Fri, 13 Sep 2013 12:48:50 -0700
8024346: ~CautiouslyPreserveExceptionMark - assert(!_thread->has_pending_exception()) failed: unexpected exception generated
Summary: Pending exceptions must be handled properly after a call to the JVMTI merge_cp_and_rewrite
Reviewed-by: coleenp, dholmes
Contributed-by: serguei.spitsyn@oracle.com
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 "trace/tracing.hpp"
63 #include "utilities/copy.hpp"
64 #include "utilities/defaultStream.hpp"
65 #include "utilities/dtrace.hpp"
66 #include "utilities/events.hpp"
67 #include "utilities/histogram.hpp"
68 #include "utilities/top.hpp"
69 #include "utilities/utf8.hpp"
70 #ifdef TARGET_OS_FAMILY_linux
71 # include "jvm_linux.h"
72 #endif
73 #ifdef TARGET_OS_FAMILY_solaris
74 # include "jvm_solaris.h"
75 #endif
76 #ifdef TARGET_OS_FAMILY_windows
77 # include "jvm_windows.h"
78 #endif
79 #ifdef TARGET_OS_FAMILY_bsd
80 # include "jvm_bsd.h"
81 #endif
83 #include <errno.h>
85 #ifndef USDT2
86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
87 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
88 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
89 #endif /* !USDT2 */
91 /*
92 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
93 such ctors and calls MUST NOT come between an oop declaration/init and its
94 usage because if objects are move this may cause various memory stomps, bus
95 errors and segfaults. Here is a cookbook for causing so called "naked oop
96 failures":
98 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
99 JVMWrapper("JVM_GetClassDeclaredFields");
101 // Object address to be held directly in mirror & not visible to GC
102 oop mirror = JNIHandles::resolve_non_null(ofClass);
104 // If this ctor can hit a safepoint, moving objects around, then
105 ComplexConstructor foo;
107 // Boom! mirror may point to JUNK instead of the intended object
108 (some dereference of mirror)
110 // Here's another call that may block for GC, making mirror stale
111 MutexLocker ml(some_lock);
113 // And here's an initializer that can result in a stale oop
114 // all in one step.
115 oop o = call_that_can_throw_exception(TRAPS);
118 The solution is to keep the oop declaration BELOW the ctor or function
119 call that might cause a GC, do another resolve to reassign the oop, or
120 consider use of a Handle instead of an oop so there is immunity from object
121 motion. But note that the "QUICK" entries below do not have a handlemark
122 and thus can only support use of handles passed in.
123 */
125 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
126 ResourceMark rm;
127 int line_number = -1;
128 const char * source_file = NULL;
129 const char * trace = "explicit";
130 InstanceKlass* caller = NULL;
131 JavaThread* jthread = JavaThread::current();
132 if (jthread->has_last_Java_frame()) {
133 vframeStream vfst(jthread);
135 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
136 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
137 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
138 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
139 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
141 Method* last_caller = NULL;
143 while (!vfst.at_end()) {
144 Method* m = vfst.method();
145 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
146 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
147 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
148 break;
149 }
150 last_caller = m;
151 vfst.next();
152 }
153 // if this is called from Class.forName0 and that is called from Class.forName,
154 // then print the caller of Class.forName. If this is Class.loadClass, then print
155 // that caller, otherwise keep quiet since this should be picked up elsewhere.
156 bool found_it = false;
157 if (!vfst.at_end() &&
158 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
159 vfst.method()->name() == vmSymbols::forName0_name()) {
160 vfst.next();
161 if (!vfst.at_end() &&
162 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
163 vfst.method()->name() == vmSymbols::forName_name()) {
164 vfst.next();
165 found_it = true;
166 }
167 } else if (last_caller != NULL &&
168 last_caller->method_holder()->name() ==
169 vmSymbols::java_lang_ClassLoader() &&
170 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
171 last_caller->name() == vmSymbols::loadClass_name())) {
172 found_it = true;
173 } else if (!vfst.at_end()) {
174 if (vfst.method()->is_native()) {
175 // JNI call
176 found_it = true;
177 }
178 }
179 if (found_it && !vfst.at_end()) {
180 // found the caller
181 caller = vfst.method()->method_holder();
182 line_number = vfst.method()->line_number_from_bci(vfst.bci());
183 if (line_number == -1) {
184 // show method name if it's a native method
185 trace = vfst.method()->name_and_sig_as_C_string();
186 }
187 Symbol* s = caller->source_file_name();
188 if (s != NULL) {
189 source_file = s->as_C_string();
190 }
191 }
192 }
193 if (caller != NULL) {
194 if (to_class != caller) {
195 const char * from = caller->external_name();
196 const char * to = to_class->external_name();
197 // print in a single call to reduce interleaving between threads
198 if (source_file != NULL) {
199 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
200 } else {
201 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
202 }
203 }
204 }
205 }
207 void trace_class_resolution(Klass* to_class) {
208 EXCEPTION_MARK;
209 trace_class_resolution_impl(to_class, THREAD);
210 if (HAS_PENDING_EXCEPTION) {
211 CLEAR_PENDING_EXCEPTION;
212 }
213 }
215 // Wrapper to trace JVM functions
217 #ifdef ASSERT
218 class JVMTraceWrapper : public StackObj {
219 public:
220 JVMTraceWrapper(const char* format, ...) {
221 if (TraceJVMCalls) {
222 va_list ap;
223 va_start(ap, format);
224 tty->print("JVM ");
225 tty->vprint_cr(format, ap);
226 va_end(ap);
227 }
228 }
229 };
231 Histogram* JVMHistogram;
232 volatile jint JVMHistogram_lock = 0;
234 class JVMHistogramElement : public HistogramElement {
235 public:
236 JVMHistogramElement(const char* name);
237 };
239 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
240 _name = elementName;
241 uintx count = 0;
243 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
244 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
245 count +=1;
246 if ( (WarnOnStalledSpinLock > 0)
247 && (count % WarnOnStalledSpinLock == 0)) {
248 warning("JVMHistogram_lock seems to be stalled");
249 }
250 }
251 }
253 if(JVMHistogram == NULL)
254 JVMHistogram = new Histogram("JVM Call Counts",100);
256 JVMHistogram->add_element(this);
257 Atomic::dec(&JVMHistogram_lock);
258 }
260 #define JVMCountWrapper(arg) \
261 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
262 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
264 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
265 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
266 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
267 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
268 #else
269 #define JVMWrapper(arg1)
270 #define JVMWrapper2(arg1, arg2)
271 #define JVMWrapper3(arg1, arg2, arg3)
272 #define JVMWrapper4(arg1, arg2, arg3, arg4)
273 #endif
276 // Interface version /////////////////////////////////////////////////////////////////////
279 JVM_LEAF(jint, JVM_GetInterfaceVersion())
280 return JVM_INTERFACE_VERSION;
281 JVM_END
284 // java.lang.System //////////////////////////////////////////////////////////////////////
287 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
288 JVMWrapper("JVM_CurrentTimeMillis");
289 return os::javaTimeMillis();
290 JVM_END
292 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
293 JVMWrapper("JVM_NanoTime");
294 return os::javaTimeNanos();
295 JVM_END
298 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
299 jobject dst, jint dst_pos, jint length))
300 JVMWrapper("JVM_ArrayCopy");
301 // Check if we have null pointers
302 if (src == NULL || dst == NULL) {
303 THROW(vmSymbols::java_lang_NullPointerException());
304 }
305 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
306 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
307 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
308 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
309 // Do copy
310 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
311 JVM_END
314 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
315 JavaValue r(T_OBJECT);
316 // public synchronized Object put(Object key, Object value);
317 HandleMark hm(THREAD);
318 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
319 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
320 JavaCalls::call_virtual(&r,
321 props,
322 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
323 vmSymbols::put_name(),
324 vmSymbols::object_object_object_signature(),
325 key_str,
326 value_str,
327 THREAD);
328 }
331 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
334 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
335 JVMWrapper("JVM_InitProperties");
336 ResourceMark rm;
338 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
340 // System property list includes both user set via -D option and
341 // jvm system specific properties.
342 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
343 PUTPROP(props, p->key(), p->value());
344 }
346 // Convert the -XX:MaxDirectMemorySize= command line flag
347 // to the sun.nio.MaxDirectMemorySize property.
348 // Do this after setting user properties to prevent people
349 // from setting the value with a -D option, as requested.
350 {
351 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
352 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
353 } else {
354 char as_chars[256];
355 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
356 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
357 }
358 }
360 // JVM monitoring and management support
361 // Add the sun.management.compiler property for the compiler's name
362 {
363 #undef CSIZE
364 #if defined(_LP64) || defined(_WIN64)
365 #define CSIZE "64-Bit "
366 #else
367 #define CSIZE
368 #endif // 64bit
370 #ifdef TIERED
371 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
372 #else
373 #if defined(COMPILER1)
374 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
375 #elif defined(COMPILER2)
376 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
377 #else
378 const char* compiler_name = "";
379 #endif // compilers
380 #endif // TIERED
382 if (*compiler_name != '\0' &&
383 (Arguments::mode() != Arguments::_int)) {
384 PUTPROP(props, "sun.management.compiler", compiler_name);
385 }
386 }
388 return properties;
389 JVM_END
392 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
394 extern volatile jint vm_created;
396 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
397 if (vm_created != 0 && (code == 0)) {
398 // The VM is about to exit. We call back into Java to check whether finalizers should be run
399 Universe::run_finalizers_on_exit();
400 }
401 before_exit(thread);
402 vm_exit(code);
403 JVM_END
406 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
407 before_exit(thread);
408 vm_exit(code);
409 JVM_END
412 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
413 register_on_exit_function(func);
414 JVM_END
417 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
418 JVMWrapper("JVM_GC");
419 if (!DisableExplicitGC) {
420 Universe::heap()->collect(GCCause::_java_lang_system_gc);
421 }
422 JVM_END
425 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
426 JVMWrapper("JVM_MaxObjectInspectionAge");
427 return Universe::heap()->millis_since_last_gc();
428 JVM_END
431 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
432 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
433 JVM_END
436 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
437 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
438 JVM_END
440 static inline jlong convert_size_t_to_jlong(size_t val) {
441 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
442 NOT_LP64 (return (jlong)val;)
443 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
444 }
446 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
447 JVMWrapper("JVM_TotalMemory");
448 size_t n = Universe::heap()->capacity();
449 return convert_size_t_to_jlong(n);
450 JVM_END
453 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
454 JVMWrapper("JVM_FreeMemory");
455 CollectedHeap* ch = Universe::heap();
456 size_t n;
457 {
458 MutexLocker x(Heap_lock);
459 n = ch->capacity() - ch->used();
460 }
461 return convert_size_t_to_jlong(n);
462 JVM_END
465 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
466 JVMWrapper("JVM_MaxMemory");
467 size_t n = Universe::heap()->max_capacity();
468 return convert_size_t_to_jlong(n);
469 JVM_END
472 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
473 JVMWrapper("JVM_ActiveProcessorCount");
474 return os::active_processor_count();
475 JVM_END
479 // java.lang.Throwable //////////////////////////////////////////////////////
482 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
483 JVMWrapper("JVM_FillInStackTrace");
484 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
485 java_lang_Throwable::fill_in_stack_trace(exception);
486 JVM_END
489 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
490 JVMWrapper("JVM_GetStackTraceDepth");
491 oop exception = JNIHandles::resolve(throwable);
492 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
493 JVM_END
496 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
497 JVMWrapper("JVM_GetStackTraceElement");
498 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
499 oop exception = JNIHandles::resolve(throwable);
500 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
501 return JNIHandles::make_local(env, element);
502 JVM_END
505 // java.lang.Object ///////////////////////////////////////////////
508 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
509 JVMWrapper("JVM_IHashCode");
510 // as implemented in the classic virtual machine; return 0 if object is NULL
511 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
512 JVM_END
515 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
516 JVMWrapper("JVM_MonitorWait");
517 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
518 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
519 if (JvmtiExport::should_post_monitor_wait()) {
520 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
521 }
522 ObjectSynchronizer::wait(obj, ms, CHECK);
523 JVM_END
526 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
527 JVMWrapper("JVM_MonitorNotify");
528 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
529 ObjectSynchronizer::notify(obj, CHECK);
530 JVM_END
533 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
534 JVMWrapper("JVM_MonitorNotifyAll");
535 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
536 ObjectSynchronizer::notifyall(obj, CHECK);
537 JVM_END
540 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
541 JVMWrapper("JVM_Clone");
542 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
543 const KlassHandle klass (THREAD, obj->klass());
544 JvmtiVMObjectAllocEventCollector oam;
546 #ifdef ASSERT
547 // Just checking that the cloneable flag is set correct
548 if (obj->is_array()) {
549 guarantee(klass->is_cloneable(), "all arrays are cloneable");
550 } else {
551 guarantee(obj->is_instance(), "should be instanceOop");
552 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
553 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
554 }
555 #endif
557 // Check if class of obj supports the Cloneable interface.
558 // All arrays are considered to be cloneable (See JLS 20.1.5)
559 if (!klass->is_cloneable()) {
560 ResourceMark rm(THREAD);
561 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
562 }
564 // Make shallow object copy
565 const int size = obj->size();
566 oop new_obj = NULL;
567 if (obj->is_array()) {
568 const int length = ((arrayOop)obj())->length();
569 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
570 } else {
571 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
572 }
573 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
574 // is modifying a reference field in the clonee, a non-oop-atomic copy might
575 // be suspended in the middle of copying the pointer and end up with parts
576 // of two different pointers in the field. Subsequent dereferences will crash.
577 // 4846409: an oop-copy of objects with long or double fields or arrays of same
578 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
579 // of oops. We know objects are aligned on a minimum of an jlong boundary.
580 // The same is true of StubRoutines::object_copy and the various oop_copy
581 // variants, and of the code generated by the inline_native_clone intrinsic.
582 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
583 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
584 (size_t)align_object_size(size) / HeapWordsPerLong);
585 // Clear the header
586 new_obj->init_mark();
588 // Store check (mark entire object and let gc sort it out)
589 BarrierSet* bs = Universe::heap()->barrier_set();
590 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
591 bs->write_region(MemRegion((HeapWord*)new_obj, size));
593 // Caution: this involves a java upcall, so the clone should be
594 // "gc-robust" by this stage.
595 if (klass->has_finalizer()) {
596 assert(obj->is_instance(), "should be instanceOop");
597 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
598 }
600 return JNIHandles::make_local(env, oop(new_obj));
601 JVM_END
603 // java.lang.Compiler ////////////////////////////////////////////////////
605 // The initial cuts of the HotSpot VM will not support JITs, and all existing
606 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
607 // functions are all silently ignored unless JVM warnings are printed.
609 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
610 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
611 JVM_END
614 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
615 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
616 return JNI_FALSE;
617 JVM_END
620 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
621 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
622 return JNI_FALSE;
623 JVM_END
626 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
627 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
628 return JNI_FALSE;
629 JVM_END
632 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
633 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
634 return NULL;
635 JVM_END
638 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
639 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
640 JVM_END
643 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
644 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
645 JVM_END
649 // Error message support //////////////////////////////////////////////////////
651 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
652 JVMWrapper("JVM_GetLastErrorString");
653 return (jint)os::lasterror(buf, len);
654 JVM_END
657 // java.io.File ///////////////////////////////////////////////////////////////
659 JVM_LEAF(char*, JVM_NativePath(char* path))
660 JVMWrapper2("JVM_NativePath (%s)", path);
661 return os::native_path(path);
662 JVM_END
665 // Misc. class handling ///////////////////////////////////////////////////////////
668 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
669 JVMWrapper("JVM_GetCallerClass");
671 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation.
672 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) {
673 Klass* k = thread->security_get_caller_class(depth);
674 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
675 } else {
676 // Basic handshaking with Java_sun_reflect_Reflection_getCallerClass
677 assert(depth == -1, "wrong handshake depth");
678 }
680 // Getting the class of the caller frame.
681 //
682 // The call stack at this point looks something like this:
683 //
684 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
685 // [1] [ @CallerSensitive API.method ]
686 // [.] [ (skipped intermediate frames) ]
687 // [n] [ caller ]
688 vframeStream vfst(thread);
689 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
690 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
691 Method* m = vfst.method();
692 assert(m != NULL, "sanity");
693 switch (n) {
694 case 0:
695 // This must only be called from Reflection.getCallerClass
696 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
697 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
698 }
699 // fall-through
700 case 1:
701 // Frame 0 and 1 must be caller sensitive.
702 if (!m->caller_sensitive()) {
703 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
704 }
705 break;
706 default:
707 if (!m->is_ignored_by_security_stack_walk()) {
708 // We have reached the desired frame; return the holder class.
709 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
710 }
711 break;
712 }
713 }
714 return NULL;
715 JVM_END
718 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
719 JVMWrapper("JVM_FindPrimitiveClass");
720 oop mirror = NULL;
721 BasicType t = name2type(utf);
722 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
723 mirror = Universe::java_mirror(t);
724 }
725 if (mirror == NULL) {
726 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
727 } else {
728 return (jclass) JNIHandles::make_local(env, mirror);
729 }
730 JVM_END
733 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
734 JVMWrapper("JVM_ResolveClass");
735 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
736 JVM_END
739 // Returns a class loaded by the bootstrap class loader; or null
740 // if not found. ClassNotFoundException is not thrown.
741 //
742 // Rationale behind JVM_FindClassFromBootLoader
743 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
744 // b> because of (a) java.dll has a direct dependecy on the unexported
745 // private symbol "_JVM_FindClassFromClassLoader@20".
746 // c> the launcher cannot use the private symbol as it dynamically opens
747 // the entry point, so if something changes, the launcher will fail
748 // unexpectedly at runtime, it is safest for the launcher to dlopen a
749 // stable exported interface.
750 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
751 // signature to change from _JVM_FindClassFromClassLoader@20 to
752 // JVM_FindClassFromClassLoader and will not be backward compatible
753 // with older JDKs.
754 // Thus a public/stable exported entry point is the right solution,
755 // public here means public in linker semantics, and is exported only
756 // to the JDK, and is not intended to be a public API.
758 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
759 const char* name))
760 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
762 // Java libraries should ensure that name is never null...
763 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
764 // It's impossible to create this class; the name cannot fit
765 // into the constant pool.
766 return NULL;
767 }
769 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
770 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
771 if (k == NULL) {
772 return NULL;
773 }
775 if (TraceClassResolution) {
776 trace_class_resolution(k);
777 }
778 return (jclass) JNIHandles::make_local(env, k->java_mirror());
779 JVM_END
781 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
782 jboolean init, jobject loader,
783 jboolean throwError))
784 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
785 throwError ? "error" : "exception");
786 // Java libraries should ensure that name is never null...
787 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
788 // It's impossible to create this class; the name cannot fit
789 // into the constant pool.
790 if (throwError) {
791 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
792 } else {
793 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
794 }
795 }
796 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
797 Handle h_loader(THREAD, JNIHandles::resolve(loader));
798 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
799 Handle(), throwError, THREAD);
801 if (TraceClassResolution && result != NULL) {
802 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
803 }
804 return result;
805 JVM_END
808 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
809 jboolean init, jclass from))
810 JVMWrapper2("JVM_FindClassFromClass %s", name);
811 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
812 // It's impossible to create this class; the name cannot fit
813 // into the constant pool.
814 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
815 }
816 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
817 oop from_class_oop = JNIHandles::resolve(from);
818 Klass* from_class = (from_class_oop == NULL)
819 ? (Klass*)NULL
820 : java_lang_Class::as_Klass(from_class_oop);
821 oop class_loader = NULL;
822 oop protection_domain = NULL;
823 if (from_class != NULL) {
824 class_loader = from_class->class_loader();
825 protection_domain = from_class->protection_domain();
826 }
827 Handle h_loader(THREAD, class_loader);
828 Handle h_prot (THREAD, protection_domain);
829 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
830 h_prot, true, thread);
832 if (TraceClassResolution && result != NULL) {
833 // this function is generally only used for class loading during verification.
834 ResourceMark rm;
835 oop from_mirror = JNIHandles::resolve_non_null(from);
836 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
837 const char * from_name = from_class->external_name();
839 oop mirror = JNIHandles::resolve_non_null(result);
840 Klass* to_class = java_lang_Class::as_Klass(mirror);
841 const char * to = to_class->external_name();
842 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
843 }
845 return result;
846 JVM_END
848 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
849 if (loader.is_null()) {
850 return;
851 }
853 // check whether the current caller thread holds the lock or not.
854 // If not, increment the corresponding counter
855 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
856 ObjectSynchronizer::owner_self) {
857 counter->inc();
858 }
859 }
861 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
862 // and JVM_DefineClassWithSourceCond()
863 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
864 jobject loader, const jbyte *buf,
865 jsize len, jobject pd, const char *source,
866 jboolean verify, TRAPS) {
867 if (source == NULL) source = "__JVM_DefineClass__";
869 assert(THREAD->is_Java_thread(), "must be a JavaThread");
870 JavaThread* jt = (JavaThread*) THREAD;
872 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
873 ClassLoader::perf_define_appclass_selftime(),
874 ClassLoader::perf_define_appclasses(),
875 jt->get_thread_stat()->perf_recursion_counts_addr(),
876 jt->get_thread_stat()->perf_timers_addr(),
877 PerfClassTraceTime::DEFINE_CLASS);
879 if (UsePerfData) {
880 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
881 }
883 // Since exceptions can be thrown, class initialization can take place
884 // if name is NULL no check for class name in .class stream has to be made.
885 TempNewSymbol class_name = NULL;
886 if (name != NULL) {
887 const int str_len = (int)strlen(name);
888 if (str_len > Symbol::max_length()) {
889 // It's impossible to create this class; the name cannot fit
890 // into the constant pool.
891 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
892 }
893 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
894 }
896 ResourceMark rm(THREAD);
897 ClassFileStream st((u1*) buf, len, (char *)source);
898 Handle class_loader (THREAD, JNIHandles::resolve(loader));
899 if (UsePerfData) {
900 is_lock_held_by_thread(class_loader,
901 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
902 THREAD);
903 }
904 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
905 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
906 protection_domain, &st,
907 verify != 0,
908 CHECK_NULL);
910 if (TraceClassResolution && k != NULL) {
911 trace_class_resolution(k);
912 }
914 return (jclass) JNIHandles::make_local(env, k->java_mirror());
915 }
918 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
919 JVMWrapper2("JVM_DefineClass %s", name);
921 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
922 JVM_END
925 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
926 JVMWrapper2("JVM_DefineClassWithSource %s", name);
928 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
929 JVM_END
931 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
932 jobject loader, const jbyte *buf,
933 jsize len, jobject pd,
934 const char *source, jboolean verify))
935 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
937 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
938 JVM_END
940 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
941 JVMWrapper("JVM_FindLoadedClass");
942 ResourceMark rm(THREAD);
944 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
945 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
947 const char* str = java_lang_String::as_utf8_string(string());
948 // Sanity check, don't expect null
949 if (str == NULL) return NULL;
951 const int str_len = (int)strlen(str);
952 if (str_len > Symbol::max_length()) {
953 // It's impossible to create this class; the name cannot fit
954 // into the constant pool.
955 return NULL;
956 }
957 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
959 // Security Note:
960 // The Java level wrapper will perform the necessary security check allowing
961 // us to pass the NULL as the initiating class loader.
962 Handle h_loader(THREAD, JNIHandles::resolve(loader));
963 if (UsePerfData) {
964 is_lock_held_by_thread(h_loader,
965 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
966 THREAD);
967 }
969 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
970 h_loader,
971 Handle(),
972 CHECK_NULL);
974 return (k == NULL) ? NULL :
975 (jclass) JNIHandles::make_local(env, k->java_mirror());
976 JVM_END
979 // Reflection support //////////////////////////////////////////////////////////////////////////////
981 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
982 assert (cls != NULL, "illegal class");
983 JVMWrapper("JVM_GetClassName");
984 JvmtiVMObjectAllocEventCollector oam;
985 ResourceMark rm(THREAD);
986 const char* name;
987 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
988 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
989 } else {
990 // Consider caching interned string in Klass
991 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
992 assert(k->is_klass(), "just checking");
993 name = k->external_name();
994 }
995 oop result = StringTable::intern((char*) name, CHECK_NULL);
996 return (jstring) JNIHandles::make_local(env, result);
997 JVM_END
1000 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1001 JVMWrapper("JVM_GetClassInterfaces");
1002 JvmtiVMObjectAllocEventCollector oam;
1003 oop mirror = JNIHandles::resolve_non_null(cls);
1005 // Special handling for primitive objects
1006 if (java_lang_Class::is_primitive(mirror)) {
1007 // Primitive objects does not have any interfaces
1008 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1009 return (jobjectArray) JNIHandles::make_local(env, r);
1010 }
1012 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1013 // Figure size of result array
1014 int size;
1015 if (klass->oop_is_instance()) {
1016 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1017 } else {
1018 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1019 size = 2;
1020 }
1022 // Allocate result array
1023 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1024 objArrayHandle result (THREAD, r);
1025 // Fill in result
1026 if (klass->oop_is_instance()) {
1027 // Regular instance klass, fill in all local interfaces
1028 for (int index = 0; index < size; index++) {
1029 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1030 result->obj_at_put(index, k->java_mirror());
1031 }
1032 } else {
1033 // All arrays implement java.lang.Cloneable and java.io.Serializable
1034 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1035 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1036 }
1037 return (jobjectArray) JNIHandles::make_local(env, result());
1038 JVM_END
1041 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1042 JVMWrapper("JVM_GetClassLoader");
1043 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1044 return NULL;
1045 }
1046 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1047 oop loader = k->class_loader();
1048 return JNIHandles::make_local(env, loader);
1049 JVM_END
1052 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1053 JVMWrapper("JVM_IsInterface");
1054 oop mirror = JNIHandles::resolve_non_null(cls);
1055 if (java_lang_Class::is_primitive(mirror)) {
1056 return JNI_FALSE;
1057 }
1058 Klass* k = java_lang_Class::as_Klass(mirror);
1059 jboolean result = k->is_interface();
1060 assert(!result || k->oop_is_instance(),
1061 "all interfaces are instance types");
1062 // The compiler intrinsic for isInterface tests the
1063 // Klass::_access_flags bits in the same way.
1064 return result;
1065 JVM_END
1068 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1069 JVMWrapper("JVM_GetClassSigners");
1070 JvmtiVMObjectAllocEventCollector oam;
1071 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1072 // There are no signers for primitive types
1073 return NULL;
1074 }
1076 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1078 // If there are no signers set in the class, or if the class
1079 // is an array, return NULL.
1080 if (signers == NULL) return NULL;
1082 // copy of the signers array
1083 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1084 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1085 for (int index = 0; index < signers->length(); index++) {
1086 signers_copy->obj_at_put(index, signers->obj_at(index));
1087 }
1089 // return the copy
1090 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1091 JVM_END
1094 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1095 JVMWrapper("JVM_SetClassSigners");
1096 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1097 // This call is ignored for primitive types and arrays.
1098 // Signers are only set once, ClassLoader.java, and thus shouldn't
1099 // be called with an array. Only the bootstrap loader creates arrays.
1100 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1101 if (k->oop_is_instance()) {
1102 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1103 }
1104 }
1105 JVM_END
1108 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1109 JVMWrapper("JVM_GetProtectionDomain");
1110 if (JNIHandles::resolve(cls) == NULL) {
1111 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1112 }
1114 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1115 // Primitive types does not have a protection domain.
1116 return NULL;
1117 }
1119 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1120 return (jobject) JNIHandles::make_local(env, pd);
1121 JVM_END
1124 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1125 // If there is a security manager and protection domain, check the access
1126 // in the protection domain, otherwise it is authorized.
1127 if (java_lang_System::has_security_manager()) {
1129 // For bootstrapping, if pd implies method isn't in the JDK, allow
1130 // this context to revert to older behavior.
1131 // In this case the isAuthorized field in AccessControlContext is also not
1132 // present.
1133 if (Universe::protection_domain_implies_method() == NULL) {
1134 return true;
1135 }
1137 // Whitelist certain access control contexts
1138 if (java_security_AccessControlContext::is_authorized(context)) {
1139 return true;
1140 }
1142 oop prot = klass->protection_domain();
1143 if (prot != NULL) {
1144 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1145 // in the new wrapper.
1146 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1147 Handle h_prot(THREAD, prot);
1148 JavaValue result(T_BOOLEAN);
1149 JavaCallArguments args(h_prot);
1150 JavaCalls::call(&result, m, &args, CHECK_false);
1151 return (result.get_jboolean() != 0);
1152 }
1153 }
1154 return true;
1155 }
1157 // Create an AccessControlContext with a protection domain with null codesource
1158 // and null permissions - which gives no permissions.
1159 oop create_dummy_access_control_context(TRAPS) {
1160 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1161 // new ProtectionDomain(null,null);
1162 oop null_protection_domain = pd_klass->allocate_instance(CHECK_NULL);
1163 Handle null_pd(THREAD, null_protection_domain);
1165 // new ProtectionDomain[] {pd};
1166 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1167 context->obj_at_put(0, null_pd());
1169 // new AccessControlContext(new ProtectionDomain[] {pd})
1170 objArrayHandle h_context(THREAD, context);
1171 oop result = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1172 return result;
1173 }
1175 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1176 JVMWrapper("JVM_DoPrivileged");
1178 if (action == NULL) {
1179 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1180 }
1182 // Compute the frame initiating the do privileged operation and setup the privileged stack
1183 vframeStream vfst(thread);
1184 vfst.security_get_caller_frame(1);
1186 if (vfst.at_end()) {
1187 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1188 }
1190 Method* method = vfst.method();
1191 instanceKlassHandle klass (THREAD, method->method_holder());
1193 // Check that action object understands "Object run()"
1194 Handle h_context;
1195 if (context != NULL) {
1196 h_context = Handle(THREAD, JNIHandles::resolve(context));
1197 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1198 if (!authorized) {
1199 // Create an unprivileged access control object and call it's run function
1200 // instead.
1201 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1202 h_context = Handle(THREAD, noprivs);
1203 }
1204 }
1206 // Check that action object understands "Object run()"
1207 Handle object (THREAD, JNIHandles::resolve(action));
1209 // get run() method
1210 Method* m_oop = object->klass()->uncached_lookup_method(
1211 vmSymbols::run_method_name(),
1212 vmSymbols::void_object_signature());
1213 methodHandle m (THREAD, m_oop);
1214 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1215 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1216 }
1218 // Stack allocated list of privileged stack elements
1219 PrivilegedElement pi;
1220 if (!vfst.at_end()) {
1221 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1222 thread->set_privileged_stack_top(&pi);
1223 }
1226 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1227 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1228 Handle pending_exception;
1229 JavaValue result(T_OBJECT);
1230 JavaCallArguments args(object);
1231 JavaCalls::call(&result, m, &args, THREAD);
1233 // done with action, remove ourselves from the list
1234 if (!vfst.at_end()) {
1235 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1236 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1237 }
1239 if (HAS_PENDING_EXCEPTION) {
1240 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1241 CLEAR_PENDING_EXCEPTION;
1243 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1244 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1245 // Throw a java.security.PrivilegedActionException(Exception e) exception
1246 JavaCallArguments args(pending_exception);
1247 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1248 vmSymbols::exception_void_signature(),
1249 &args);
1250 }
1251 }
1253 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1254 return JNIHandles::make_local(env, (oop) result.get_jobject());
1255 JVM_END
1258 // Returns the inherited_access_control_context field of the running thread.
1259 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1260 JVMWrapper("JVM_GetInheritedAccessControlContext");
1261 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1262 return JNIHandles::make_local(env, result);
1263 JVM_END
1265 class RegisterArrayForGC {
1266 private:
1267 JavaThread *_thread;
1268 public:
1269 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1270 _thread = thread;
1271 _thread->register_array_for_gc(array);
1272 }
1274 ~RegisterArrayForGC() {
1275 _thread->register_array_for_gc(NULL);
1276 }
1277 };
1280 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1281 JVMWrapper("JVM_GetStackAccessControlContext");
1282 if (!UsePrivilegedStack) return NULL;
1284 ResourceMark rm(THREAD);
1285 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1286 JvmtiVMObjectAllocEventCollector oam;
1288 // count the protection domains on the execution stack. We collapse
1289 // duplicate consecutive protection domains into a single one, as
1290 // well as stopping when we hit a privileged frame.
1292 // Use vframeStream to iterate through Java frames
1293 vframeStream vfst(thread);
1295 oop previous_protection_domain = NULL;
1296 Handle privileged_context(thread, NULL);
1297 bool is_privileged = false;
1298 oop protection_domain = NULL;
1300 for(; !vfst.at_end(); vfst.next()) {
1301 // get method of frame
1302 Method* method = vfst.method();
1303 intptr_t* frame_id = vfst.frame_id();
1305 // check the privileged frames to see if we have a match
1306 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1307 // this frame is privileged
1308 is_privileged = true;
1309 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1310 protection_domain = thread->privileged_stack_top()->protection_domain();
1311 } else {
1312 protection_domain = method->method_holder()->protection_domain();
1313 }
1315 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1316 local_array->push(protection_domain);
1317 previous_protection_domain = protection_domain;
1318 }
1320 if (is_privileged) break;
1321 }
1324 // either all the domains on the stack were system domains, or
1325 // we had a privileged system domain
1326 if (local_array->is_empty()) {
1327 if (is_privileged && privileged_context.is_null()) return NULL;
1329 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1330 return JNIHandles::make_local(env, result);
1331 }
1333 // the resource area must be registered in case of a gc
1334 RegisterArrayForGC ragc(thread, local_array);
1335 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1336 local_array->length(), CHECK_NULL);
1337 objArrayHandle h_context(thread, context);
1338 for (int index = 0; index < local_array->length(); index++) {
1339 h_context->obj_at_put(index, local_array->at(index));
1340 }
1342 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1344 return JNIHandles::make_local(env, result);
1345 JVM_END
1348 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1349 JVMWrapper("JVM_IsArrayClass");
1350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1351 return (k != NULL) && k->oop_is_array() ? true : false;
1352 JVM_END
1355 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1356 JVMWrapper("JVM_IsPrimitiveClass");
1357 oop mirror = JNIHandles::resolve_non_null(cls);
1358 return (jboolean) java_lang_Class::is_primitive(mirror);
1359 JVM_END
1362 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1363 JVMWrapper("JVM_GetComponentType");
1364 oop mirror = JNIHandles::resolve_non_null(cls);
1365 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1366 return (jclass) JNIHandles::make_local(env, result);
1367 JVM_END
1370 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1371 JVMWrapper("JVM_GetClassModifiers");
1372 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1373 // Primitive type
1374 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1375 }
1377 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1378 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1379 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1380 return k->modifier_flags();
1381 JVM_END
1384 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1386 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1387 JvmtiVMObjectAllocEventCollector oam;
1388 // ofClass is a reference to a java_lang_Class object. The mirror object
1389 // of an InstanceKlass
1391 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1392 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1393 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1394 return (jobjectArray)JNIHandles::make_local(env, result);
1395 }
1397 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1398 InnerClassesIterator iter(k);
1400 if (iter.length() == 0) {
1401 // Neither an inner nor outer class
1402 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1403 return (jobjectArray)JNIHandles::make_local(env, result);
1404 }
1406 // find inner class info
1407 constantPoolHandle cp(thread, k->constants());
1408 int length = iter.length();
1410 // Allocate temp. result array
1411 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1412 objArrayHandle result (THREAD, r);
1413 int members = 0;
1415 for (; !iter.done(); iter.next()) {
1416 int ioff = iter.inner_class_info_index();
1417 int ooff = iter.outer_class_info_index();
1419 if (ioff != 0 && ooff != 0) {
1420 // Check to see if the name matches the class we're looking for
1421 // before attempting to find the class.
1422 if (cp->klass_name_at_matches(k, ooff)) {
1423 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1424 if (outer_klass == k()) {
1425 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1426 instanceKlassHandle inner_klass (THREAD, ik);
1428 // Throws an exception if outer klass has not declared k as
1429 // an inner klass
1430 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1432 result->obj_at_put(members, inner_klass->java_mirror());
1433 members++;
1434 }
1435 }
1436 }
1437 }
1439 if (members != length) {
1440 // Return array of right length
1441 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1442 for(int i = 0; i < members; i++) {
1443 res->obj_at_put(i, result->obj_at(i));
1444 }
1445 return (jobjectArray)JNIHandles::make_local(env, res);
1446 }
1448 return (jobjectArray)JNIHandles::make_local(env, result());
1449 JVM_END
1452 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1453 {
1454 // ofClass is a reference to a java_lang_Class object.
1455 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1456 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1457 return NULL;
1458 }
1460 bool inner_is_member = false;
1461 Klass* outer_klass
1462 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1463 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1464 if (outer_klass == NULL) return NULL; // already a top-level class
1465 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1466 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1467 }
1468 JVM_END
1470 // should be in InstanceKlass.cpp, but is here for historical reasons
1471 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1472 bool* inner_is_member,
1473 TRAPS) {
1474 Thread* thread = THREAD;
1475 InnerClassesIterator iter(k);
1476 if (iter.length() == 0) {
1477 // No inner class info => no declaring class
1478 return NULL;
1479 }
1481 constantPoolHandle i_cp(thread, k->constants());
1483 bool found = false;
1484 Klass* ok;
1485 instanceKlassHandle outer_klass;
1486 *inner_is_member = false;
1488 // Find inner_klass attribute
1489 for (; !iter.done() && !found; iter.next()) {
1490 int ioff = iter.inner_class_info_index();
1491 int ooff = iter.outer_class_info_index();
1492 int noff = iter.inner_name_index();
1493 if (ioff != 0) {
1494 // Check to see if the name matches the class we're looking for
1495 // before attempting to find the class.
1496 if (i_cp->klass_name_at_matches(k, ioff)) {
1497 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1498 found = (k() == inner_klass);
1499 if (found && ooff != 0) {
1500 ok = i_cp->klass_at(ooff, CHECK_NULL);
1501 outer_klass = instanceKlassHandle(thread, ok);
1502 *inner_is_member = true;
1503 }
1504 }
1505 }
1506 }
1508 if (found && outer_klass.is_null()) {
1509 // It may be anonymous; try for that.
1510 int encl_method_class_idx = k->enclosing_method_class_index();
1511 if (encl_method_class_idx != 0) {
1512 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1513 outer_klass = instanceKlassHandle(thread, ok);
1514 *inner_is_member = false;
1515 }
1516 }
1518 // If no inner class attribute found for this class.
1519 if (outer_klass.is_null()) return NULL;
1521 // Throws an exception if outer klass has not declared k as an inner klass
1522 // We need evidence that each klass knows about the other, or else
1523 // the system could allow a spoof of an inner class to gain access rights.
1524 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1525 return outer_klass();
1526 }
1528 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1529 assert (cls != NULL, "illegal class");
1530 JVMWrapper("JVM_GetClassSignature");
1531 JvmtiVMObjectAllocEventCollector oam;
1532 ResourceMark rm(THREAD);
1533 // Return null for arrays and primatives
1534 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1535 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1536 if (k->oop_is_instance()) {
1537 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1538 if (sym == NULL) return NULL;
1539 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1540 return (jstring) JNIHandles::make_local(env, str());
1541 }
1542 }
1543 return NULL;
1544 JVM_END
1547 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1548 assert (cls != NULL, "illegal class");
1549 JVMWrapper("JVM_GetClassAnnotations");
1551 // Return null for arrays and primitives
1552 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1553 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1554 if (k->oop_is_instance()) {
1555 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1556 return (jbyteArray) JNIHandles::make_local(env, a);
1557 }
1558 }
1559 return NULL;
1560 JVM_END
1563 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1564 // some of this code was adapted from from jni_FromReflectedField
1566 oop reflected = JNIHandles::resolve_non_null(field);
1567 oop mirror = java_lang_reflect_Field::clazz(reflected);
1568 Klass* k = java_lang_Class::as_Klass(mirror);
1569 int slot = java_lang_reflect_Field::slot(reflected);
1570 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1572 KlassHandle kh(THREAD, k);
1573 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1575 if (modifiers & JVM_ACC_STATIC) {
1576 // for static fields we only look in the current class
1577 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1578 assert(false, "cannot find static field");
1579 return false;
1580 }
1581 } else {
1582 // for instance fields we start with the current class and work
1583 // our way up through the superclass chain
1584 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1585 assert(false, "cannot find instance field");
1586 return false;
1587 }
1588 }
1589 return true;
1590 }
1592 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1593 // field is a handle to a java.lang.reflect.Field object
1594 assert(field != NULL, "illegal field");
1595 JVMWrapper("JVM_GetFieldAnnotations");
1597 fieldDescriptor fd;
1598 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1599 if (!gotFd) {
1600 return NULL;
1601 }
1603 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1604 JVM_END
1607 static Method* jvm_get_method_common(jobject method) {
1608 // some of this code was adapted from from jni_FromReflectedMethod
1610 oop reflected = JNIHandles::resolve_non_null(method);
1611 oop mirror = NULL;
1612 int slot = 0;
1614 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1615 mirror = java_lang_reflect_Constructor::clazz(reflected);
1616 slot = java_lang_reflect_Constructor::slot(reflected);
1617 } else {
1618 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1619 "wrong type");
1620 mirror = java_lang_reflect_Method::clazz(reflected);
1621 slot = java_lang_reflect_Method::slot(reflected);
1622 }
1623 Klass* k = java_lang_Class::as_Klass(mirror);
1625 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1626 assert(m != NULL, "cannot find method");
1627 return m; // caller has to deal with NULL in product mode
1628 }
1631 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1632 JVMWrapper("JVM_GetMethodAnnotations");
1634 // method is a handle to a java.lang.reflect.Method object
1635 Method* m = jvm_get_method_common(method);
1636 if (m == NULL) {
1637 return NULL;
1638 }
1640 return (jbyteArray) JNIHandles::make_local(env,
1641 Annotations::make_java_array(m->annotations(), THREAD));
1642 JVM_END
1645 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1646 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1648 // method is a handle to a java.lang.reflect.Method object
1649 Method* m = jvm_get_method_common(method);
1650 if (m == NULL) {
1651 return NULL;
1652 }
1654 return (jbyteArray) JNIHandles::make_local(env,
1655 Annotations::make_java_array(m->annotation_default(), THREAD));
1656 JVM_END
1659 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1660 JVMWrapper("JVM_GetMethodParameterAnnotations");
1662 // method is a handle to a java.lang.reflect.Method object
1663 Method* m = jvm_get_method_common(method);
1664 if (m == NULL) {
1665 return NULL;
1666 }
1668 return (jbyteArray) JNIHandles::make_local(env,
1669 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1670 JVM_END
1672 /* Type use annotations support (JDK 1.8) */
1674 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1675 assert (cls != NULL, "illegal class");
1676 JVMWrapper("JVM_GetClassTypeAnnotations");
1677 ResourceMark rm(THREAD);
1678 // Return null for arrays and primitives
1679 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1680 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1681 if (k->oop_is_instance()) {
1682 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1683 if (type_annotations != NULL) {
1684 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1685 return (jbyteArray) JNIHandles::make_local(env, a);
1686 }
1687 }
1688 }
1689 return NULL;
1690 JVM_END
1692 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1693 assert (method != NULL, "illegal method");
1694 JVMWrapper("JVM_GetMethodTypeAnnotations");
1696 // method is a handle to a java.lang.reflect.Method object
1697 Method* m = jvm_get_method_common(method);
1698 if (m == NULL) {
1699 return NULL;
1700 }
1702 AnnotationArray* type_annotations = m->type_annotations();
1703 if (type_annotations != NULL) {
1704 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1705 return (jbyteArray) JNIHandles::make_local(env, a);
1706 }
1708 return NULL;
1709 JVM_END
1711 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1712 assert (field != NULL, "illegal field");
1713 JVMWrapper("JVM_GetFieldTypeAnnotations");
1715 fieldDescriptor fd;
1716 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1717 if (!gotFd) {
1718 return NULL;
1719 }
1721 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1722 JVM_END
1724 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1725 if (!cp->is_within_bounds(index)) {
1726 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1727 }
1728 }
1730 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1731 {
1732 JVMWrapper("JVM_GetMethodParameters");
1733 // method is a handle to a java.lang.reflect.Method object
1734 Method* method_ptr = jvm_get_method_common(method);
1735 methodHandle mh (THREAD, method_ptr);
1736 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1737 const int num_params = mh->method_parameters_length();
1739 if (0 != num_params) {
1740 // make sure all the symbols are properly formatted
1741 for (int i = 0; i < num_params; i++) {
1742 MethodParametersElement* params = mh->method_parameters_start();
1743 int index = params[i].name_cp_index;
1744 bounds_check(mh->constants(), index, CHECK_NULL);
1746 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1747 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1748 "Wrong type at constant pool index");
1749 }
1751 }
1753 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1754 objArrayHandle result (THREAD, result_oop);
1756 for (int i = 0; i < num_params; i++) {
1757 MethodParametersElement* params = mh->method_parameters_start();
1758 // For a 0 index, give a NULL symbol
1759 Symbol* sym = 0 != params[i].name_cp_index ?
1760 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1761 int flags = params[i].flags;
1762 oop param = Reflection::new_parameter(reflected_method, i, sym,
1763 flags, CHECK_NULL);
1764 result->obj_at_put(i, param);
1765 }
1766 return (jobjectArray)JNIHandles::make_local(env, result());
1767 } else {
1768 return (jobjectArray)NULL;
1769 }
1770 }
1771 JVM_END
1773 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1775 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1776 {
1777 JVMWrapper("JVM_GetClassDeclaredFields");
1778 JvmtiVMObjectAllocEventCollector oam;
1780 // Exclude primitive types and array types
1781 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1782 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1783 // Return empty array
1784 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1785 return (jobjectArray) JNIHandles::make_local(env, res);
1786 }
1788 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1789 constantPoolHandle cp(THREAD, k->constants());
1791 // Ensure class is linked
1792 k->link_class(CHECK_NULL);
1794 // 4496456 We need to filter out java.lang.Throwable.backtrace
1795 bool skip_backtrace = false;
1797 // Allocate result
1798 int num_fields;
1800 if (publicOnly) {
1801 num_fields = 0;
1802 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1803 if (fs.access_flags().is_public()) ++num_fields;
1804 }
1805 } else {
1806 num_fields = k->java_fields_count();
1808 if (k() == SystemDictionary::Throwable_klass()) {
1809 num_fields--;
1810 skip_backtrace = true;
1811 }
1812 }
1814 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1815 objArrayHandle result (THREAD, r);
1817 int out_idx = 0;
1818 fieldDescriptor fd;
1819 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1820 if (skip_backtrace) {
1821 // 4496456 skip java.lang.Throwable.backtrace
1822 int offset = fs.offset();
1823 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1824 }
1826 if (!publicOnly || fs.access_flags().is_public()) {
1827 fd.initialize(k(), fs.index());
1828 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1829 result->obj_at_put(out_idx, field);
1830 ++out_idx;
1831 }
1832 }
1833 assert(out_idx == num_fields, "just checking");
1834 return (jobjectArray) JNIHandles::make_local(env, result());
1835 }
1836 JVM_END
1838 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1839 {
1840 JVMWrapper("JVM_GetClassDeclaredMethods");
1841 JvmtiVMObjectAllocEventCollector oam;
1843 // Exclude primitive types and array types
1844 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1845 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1846 // Return empty array
1847 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1848 return (jobjectArray) JNIHandles::make_local(env, res);
1849 }
1851 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1853 // Ensure class is linked
1854 k->link_class(CHECK_NULL);
1856 Array<Method*>* methods = k->methods();
1857 int methods_length = methods->length();
1858 int num_methods = 0;
1860 int i;
1861 for (i = 0; i < methods_length; i++) {
1862 methodHandle method(THREAD, methods->at(i));
1863 if (!method->is_initializer() && !method->is_overpass()) {
1864 if (!publicOnly || method->is_public()) {
1865 ++num_methods;
1866 }
1867 }
1868 }
1870 // Allocate result
1871 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1872 objArrayHandle result (THREAD, r);
1874 int out_idx = 0;
1875 for (i = 0; i < methods_length; i++) {
1876 methodHandle method(THREAD, methods->at(i));
1877 if (!method->is_initializer() && !method->is_overpass()) {
1878 if (!publicOnly || method->is_public()) {
1879 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1880 result->obj_at_put(out_idx, m);
1881 ++out_idx;
1882 }
1883 }
1884 }
1885 assert(out_idx == num_methods, "just checking");
1886 return (jobjectArray) JNIHandles::make_local(env, result());
1887 }
1888 JVM_END
1890 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1891 {
1892 JVMWrapper("JVM_GetClassDeclaredConstructors");
1893 JvmtiVMObjectAllocEventCollector oam;
1895 // Exclude primitive types and array types
1896 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1897 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1898 // Return empty array
1899 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1900 return (jobjectArray) JNIHandles::make_local(env, res);
1901 }
1903 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1905 // Ensure class is linked
1906 k->link_class(CHECK_NULL);
1908 Array<Method*>* methods = k->methods();
1909 int methods_length = methods->length();
1910 int num_constructors = 0;
1912 int i;
1913 for (i = 0; i < methods_length; i++) {
1914 methodHandle method(THREAD, methods->at(i));
1915 if (method->is_initializer() && !method->is_static()) {
1916 if (!publicOnly || method->is_public()) {
1917 ++num_constructors;
1918 }
1919 }
1920 }
1922 // Allocate result
1923 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1924 objArrayHandle result(THREAD, r);
1926 int out_idx = 0;
1927 for (i = 0; i < methods_length; i++) {
1928 methodHandle method(THREAD, methods->at(i));
1929 if (method->is_initializer() && !method->is_static()) {
1930 if (!publicOnly || method->is_public()) {
1931 oop m = Reflection::new_constructor(method, CHECK_NULL);
1932 result->obj_at_put(out_idx, m);
1933 ++out_idx;
1934 }
1935 }
1936 }
1937 assert(out_idx == num_constructors, "just checking");
1938 return (jobjectArray) JNIHandles::make_local(env, result());
1939 }
1940 JVM_END
1942 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1943 {
1944 JVMWrapper("JVM_GetClassAccessFlags");
1945 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1946 // Primitive type
1947 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1948 }
1950 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1951 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1952 }
1953 JVM_END
1956 // Constant pool access //////////////////////////////////////////////////////////
1958 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1959 {
1960 JVMWrapper("JVM_GetClassConstantPool");
1961 JvmtiVMObjectAllocEventCollector oam;
1963 // Return null for primitives and arrays
1964 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1965 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1966 if (k->oop_is_instance()) {
1967 instanceKlassHandle k_h(THREAD, k);
1968 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1969 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1970 return JNIHandles::make_local(jcp());
1971 }
1972 }
1973 return NULL;
1974 }
1975 JVM_END
1978 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1979 {
1980 JVMWrapper("JVM_ConstantPoolGetSize");
1981 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1982 return cp->length();
1983 }
1984 JVM_END
1987 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1988 {
1989 JVMWrapper("JVM_ConstantPoolGetClassAt");
1990 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1991 bounds_check(cp, index, CHECK_NULL);
1992 constantTag tag = cp->tag_at(index);
1993 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1994 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1995 }
1996 Klass* k = cp->klass_at(index, CHECK_NULL);
1997 return (jclass) JNIHandles::make_local(k->java_mirror());
1998 }
1999 JVM_END
2001 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2002 {
2003 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2004 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2005 bounds_check(cp, index, CHECK_NULL);
2006 constantTag tag = cp->tag_at(index);
2007 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2008 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2009 }
2010 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2011 if (k == NULL) return NULL;
2012 return (jclass) JNIHandles::make_local(k->java_mirror());
2013 }
2014 JVM_END
2016 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2017 constantTag tag = cp->tag_at(index);
2018 if (!tag.is_method() && !tag.is_interface_method()) {
2019 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2020 }
2021 int klass_ref = cp->uncached_klass_ref_index_at(index);
2022 Klass* k_o;
2023 if (force_resolution) {
2024 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2025 } else {
2026 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2027 if (k_o == NULL) return NULL;
2028 }
2029 instanceKlassHandle k(THREAD, k_o);
2030 Symbol* name = cp->uncached_name_ref_at(index);
2031 Symbol* sig = cp->uncached_signature_ref_at(index);
2032 methodHandle m (THREAD, k->find_method(name, sig));
2033 if (m.is_null()) {
2034 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2035 }
2036 oop method;
2037 if (!m->is_initializer() || m->is_static()) {
2038 method = Reflection::new_method(m, true, true, CHECK_NULL);
2039 } else {
2040 method = Reflection::new_constructor(m, CHECK_NULL);
2041 }
2042 return JNIHandles::make_local(method);
2043 }
2045 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2046 {
2047 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2048 JvmtiVMObjectAllocEventCollector oam;
2049 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2050 bounds_check(cp, index, CHECK_NULL);
2051 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2052 return res;
2053 }
2054 JVM_END
2056 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2057 {
2058 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2059 JvmtiVMObjectAllocEventCollector oam;
2060 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2061 bounds_check(cp, index, CHECK_NULL);
2062 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2063 return res;
2064 }
2065 JVM_END
2067 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2068 constantTag tag = cp->tag_at(index);
2069 if (!tag.is_field()) {
2070 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2071 }
2072 int klass_ref = cp->uncached_klass_ref_index_at(index);
2073 Klass* k_o;
2074 if (force_resolution) {
2075 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2076 } else {
2077 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2078 if (k_o == NULL) return NULL;
2079 }
2080 instanceKlassHandle k(THREAD, k_o);
2081 Symbol* name = cp->uncached_name_ref_at(index);
2082 Symbol* sig = cp->uncached_signature_ref_at(index);
2083 fieldDescriptor fd;
2084 Klass* target_klass = k->find_field(name, sig, &fd);
2085 if (target_klass == NULL) {
2086 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2087 }
2088 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2089 return JNIHandles::make_local(field);
2090 }
2092 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2093 {
2094 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2095 JvmtiVMObjectAllocEventCollector oam;
2096 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2097 bounds_check(cp, index, CHECK_NULL);
2098 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2099 return res;
2100 }
2101 JVM_END
2103 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2104 {
2105 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2106 JvmtiVMObjectAllocEventCollector oam;
2107 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2108 bounds_check(cp, index, CHECK_NULL);
2109 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2110 return res;
2111 }
2112 JVM_END
2114 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2115 {
2116 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2117 JvmtiVMObjectAllocEventCollector oam;
2118 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2119 bounds_check(cp, index, CHECK_NULL);
2120 constantTag tag = cp->tag_at(index);
2121 if (!tag.is_field_or_method()) {
2122 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2123 }
2124 int klass_ref = cp->uncached_klass_ref_index_at(index);
2125 Symbol* klass_name = cp->klass_name_at(klass_ref);
2126 Symbol* member_name = cp->uncached_name_ref_at(index);
2127 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2128 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2129 objArrayHandle dest(THREAD, dest_o);
2130 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2131 dest->obj_at_put(0, str());
2132 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2133 dest->obj_at_put(1, str());
2134 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2135 dest->obj_at_put(2, str());
2136 return (jobjectArray) JNIHandles::make_local(dest());
2137 }
2138 JVM_END
2140 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2141 {
2142 JVMWrapper("JVM_ConstantPoolGetIntAt");
2143 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2144 bounds_check(cp, index, CHECK_0);
2145 constantTag tag = cp->tag_at(index);
2146 if (!tag.is_int()) {
2147 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2148 }
2149 return cp->int_at(index);
2150 }
2151 JVM_END
2153 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2154 {
2155 JVMWrapper("JVM_ConstantPoolGetLongAt");
2156 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2157 bounds_check(cp, index, CHECK_(0L));
2158 constantTag tag = cp->tag_at(index);
2159 if (!tag.is_long()) {
2160 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2161 }
2162 return cp->long_at(index);
2163 }
2164 JVM_END
2166 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2167 {
2168 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2169 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2170 bounds_check(cp, index, CHECK_(0.0f));
2171 constantTag tag = cp->tag_at(index);
2172 if (!tag.is_float()) {
2173 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2174 }
2175 return cp->float_at(index);
2176 }
2177 JVM_END
2179 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2180 {
2181 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2182 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2183 bounds_check(cp, index, CHECK_(0.0));
2184 constantTag tag = cp->tag_at(index);
2185 if (!tag.is_double()) {
2186 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2187 }
2188 return cp->double_at(index);
2189 }
2190 JVM_END
2192 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2193 {
2194 JVMWrapper("JVM_ConstantPoolGetStringAt");
2195 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2196 bounds_check(cp, index, CHECK_NULL);
2197 constantTag tag = cp->tag_at(index);
2198 if (!tag.is_string()) {
2199 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2200 }
2201 oop str = cp->string_at(index, CHECK_NULL);
2202 return (jstring) JNIHandles::make_local(str);
2203 }
2204 JVM_END
2206 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2207 {
2208 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2209 JvmtiVMObjectAllocEventCollector oam;
2210 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2211 bounds_check(cp, index, CHECK_NULL);
2212 constantTag tag = cp->tag_at(index);
2213 if (!tag.is_symbol()) {
2214 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2215 }
2216 Symbol* sym = cp->symbol_at(index);
2217 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2218 return (jstring) JNIHandles::make_local(str());
2219 }
2220 JVM_END
2223 // Assertion support. //////////////////////////////////////////////////////////
2225 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2226 JVMWrapper("JVM_DesiredAssertionStatus");
2227 assert(cls != NULL, "bad class");
2229 oop r = JNIHandles::resolve(cls);
2230 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2231 if (java_lang_Class::is_primitive(r)) return false;
2233 Klass* k = java_lang_Class::as_Klass(r);
2234 assert(k->oop_is_instance(), "must be an instance klass");
2235 if (! k->oop_is_instance()) return false;
2237 ResourceMark rm(THREAD);
2238 const char* name = k->name()->as_C_string();
2239 bool system_class = k->class_loader() == NULL;
2240 return JavaAssertions::enabled(name, system_class);
2242 JVM_END
2245 // Return a new AssertionStatusDirectives object with the fields filled in with
2246 // command-line assertion arguments (i.e., -ea, -da).
2247 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2248 JVMWrapper("JVM_AssertionStatusDirectives");
2249 JvmtiVMObjectAllocEventCollector oam;
2250 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2251 return JNIHandles::make_local(env, asd);
2252 JVM_END
2254 // Verification ////////////////////////////////////////////////////////////////////////////////
2256 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2258 // RedefineClasses support: bug 6214132 caused verification to fail.
2259 // All functions from this section should call the jvmtiThreadSate function:
2260 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2261 // The function returns a Klass* of the _scratch_class if the verifier
2262 // was invoked in the middle of the class redefinition.
2263 // Otherwise it returns its argument value which is the _the_class Klass*.
2264 // Please, refer to the description in the jvmtiThreadSate.hpp.
2266 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2267 JVMWrapper("JVM_GetClassNameUTF");
2268 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2269 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2270 return k->name()->as_utf8();
2271 JVM_END
2274 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2275 JVMWrapper("JVM_GetClassCPTypes");
2276 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2277 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2278 // types will have length zero if this is not an InstanceKlass
2279 // (length is determined by call to JVM_GetClassCPEntriesCount)
2280 if (k->oop_is_instance()) {
2281 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2282 for (int index = cp->length() - 1; index >= 0; index--) {
2283 constantTag tag = cp->tag_at(index);
2284 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2285 }
2286 }
2287 JVM_END
2290 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2291 JVMWrapper("JVM_GetClassCPEntriesCount");
2292 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2293 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2294 if (!k->oop_is_instance())
2295 return 0;
2296 return InstanceKlass::cast(k)->constants()->length();
2297 JVM_END
2300 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2301 JVMWrapper("JVM_GetClassFieldsCount");
2302 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2303 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2304 if (!k->oop_is_instance())
2305 return 0;
2306 return InstanceKlass::cast(k)->java_fields_count();
2307 JVM_END
2310 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2311 JVMWrapper("JVM_GetClassMethodsCount");
2312 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2313 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2314 if (!k->oop_is_instance())
2315 return 0;
2316 return InstanceKlass::cast(k)->methods()->length();
2317 JVM_END
2320 // The following methods, used for the verifier, are never called with
2321 // array klasses, so a direct cast to InstanceKlass is safe.
2322 // Typically, these methods are called in a loop with bounds determined
2323 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2324 // zero for arrays.
2325 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2326 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2327 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2328 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2329 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2330 int length = method->checked_exceptions_length();
2331 if (length > 0) {
2332 CheckedExceptionElement* table= method->checked_exceptions_start();
2333 for (int i = 0; i < length; i++) {
2334 exceptions[i] = table[i].class_cp_index;
2335 }
2336 }
2337 JVM_END
2340 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2341 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2342 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2343 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2344 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2345 return method->checked_exceptions_length();
2346 JVM_END
2349 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2350 JVMWrapper("JVM_GetMethodIxByteCode");
2351 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2352 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2353 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2354 memcpy(code, method->code_base(), method->code_size());
2355 JVM_END
2358 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2359 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2360 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2361 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2362 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2363 return method->code_size();
2364 JVM_END
2367 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2368 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2369 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2370 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2371 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2372 ExceptionTable extable(method);
2373 entry->start_pc = extable.start_pc(entry_index);
2374 entry->end_pc = extable.end_pc(entry_index);
2375 entry->handler_pc = extable.handler_pc(entry_index);
2376 entry->catchType = extable.catch_type_index(entry_index);
2377 JVM_END
2380 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2381 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2382 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2383 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2384 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2385 return method->exception_table_length();
2386 JVM_END
2389 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2390 JVMWrapper("JVM_GetMethodIxModifiers");
2391 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2392 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2393 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2394 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2395 JVM_END
2398 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2399 JVMWrapper("JVM_GetFieldIxModifiers");
2400 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2401 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2402 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2403 JVM_END
2406 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2407 JVMWrapper("JVM_GetMethodIxLocalsCount");
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->max_locals();
2412 JVM_END
2415 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2416 JVMWrapper("JVM_GetMethodIxArgsSize");
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->size_of_parameters();
2421 JVM_END
2424 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2425 JVMWrapper("JVM_GetMethodIxMaxStack");
2426 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2427 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2428 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2429 return method->verifier_max_stack();
2430 JVM_END
2433 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2434 JVMWrapper("JVM_IsConstructorIx");
2435 ResourceMark rm(THREAD);
2436 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2437 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2438 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2439 return method->name() == vmSymbols::object_initializer_name();
2440 JVM_END
2443 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2444 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2445 ResourceMark rm(THREAD);
2446 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2447 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2448 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2449 return method->is_overpass();
2450 JVM_END
2452 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2453 JVMWrapper("JVM_GetMethodIxIxUTF");
2454 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2455 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2456 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2457 return method->name()->as_utf8();
2458 JVM_END
2461 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2462 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2464 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2465 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2466 return method->signature()->as_utf8();
2467 JVM_END
2469 /**
2470 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2471 * read entries in the constant pool. Since the old verifier always
2472 * works on a copy of the code, it will not see any rewriting that
2473 * may possibly occur in the middle of verification. So it is important
2474 * that nothing it calls tries to use the cpCache instead of the raw
2475 * constant pool, so we must use cp->uncached_x methods when appropriate.
2476 */
2477 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2478 JVMWrapper("JVM_GetCPFieldNameUTF");
2479 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2480 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2481 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2482 switch (cp->tag_at(cp_index).value()) {
2483 case JVM_CONSTANT_Fieldref:
2484 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2485 default:
2486 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2487 }
2488 ShouldNotReachHere();
2489 return NULL;
2490 JVM_END
2493 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2494 JVMWrapper("JVM_GetCPMethodNameUTF");
2495 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2496 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2497 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2498 switch (cp->tag_at(cp_index).value()) {
2499 case JVM_CONSTANT_InterfaceMethodref:
2500 case JVM_CONSTANT_Methodref:
2501 case JVM_CONSTANT_NameAndType: // for invokedynamic
2502 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2503 default:
2504 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2505 }
2506 ShouldNotReachHere();
2507 return NULL;
2508 JVM_END
2511 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2512 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2514 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2515 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2516 switch (cp->tag_at(cp_index).value()) {
2517 case JVM_CONSTANT_InterfaceMethodref:
2518 case JVM_CONSTANT_Methodref:
2519 case JVM_CONSTANT_NameAndType: // for invokedynamic
2520 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2521 default:
2522 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2523 }
2524 ShouldNotReachHere();
2525 return NULL;
2526 JVM_END
2529 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2530 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2531 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2532 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2533 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2534 switch (cp->tag_at(cp_index).value()) {
2535 case JVM_CONSTANT_Fieldref:
2536 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2537 default:
2538 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2539 }
2540 ShouldNotReachHere();
2541 return NULL;
2542 JVM_END
2545 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2546 JVMWrapper("JVM_GetCPClassNameUTF");
2547 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2548 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2549 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2550 Symbol* classname = cp->klass_name_at(cp_index);
2551 return classname->as_utf8();
2552 JVM_END
2555 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2556 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2557 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2558 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2559 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2560 switch (cp->tag_at(cp_index).value()) {
2561 case JVM_CONSTANT_Fieldref: {
2562 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2563 Symbol* classname = cp->klass_name_at(class_index);
2564 return classname->as_utf8();
2565 }
2566 default:
2567 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2568 }
2569 ShouldNotReachHere();
2570 return NULL;
2571 JVM_END
2574 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2575 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2576 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2577 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2578 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2579 switch (cp->tag_at(cp_index).value()) {
2580 case JVM_CONSTANT_Methodref:
2581 case JVM_CONSTANT_InterfaceMethodref: {
2582 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2583 Symbol* classname = cp->klass_name_at(class_index);
2584 return classname->as_utf8();
2585 }
2586 default:
2587 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2588 }
2589 ShouldNotReachHere();
2590 return NULL;
2591 JVM_END
2594 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2595 JVMWrapper("JVM_GetCPFieldModifiers");
2596 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2597 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2598 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2599 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2600 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2601 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2602 switch (cp->tag_at(cp_index).value()) {
2603 case JVM_CONSTANT_Fieldref: {
2604 Symbol* name = cp->uncached_name_ref_at(cp_index);
2605 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2606 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2607 if (fs.name() == name && fs.signature() == signature) {
2608 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2609 }
2610 }
2611 return -1;
2612 }
2613 default:
2614 fatal("JVM_GetCPFieldModifiers: illegal constant");
2615 }
2616 ShouldNotReachHere();
2617 return 0;
2618 JVM_END
2621 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2622 JVMWrapper("JVM_GetCPMethodModifiers");
2623 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2624 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2625 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2626 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2627 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2628 switch (cp->tag_at(cp_index).value()) {
2629 case JVM_CONSTANT_Methodref:
2630 case JVM_CONSTANT_InterfaceMethodref: {
2631 Symbol* name = cp->uncached_name_ref_at(cp_index);
2632 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2633 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2634 int methods_count = methods->length();
2635 for (int i = 0; i < methods_count; i++) {
2636 Method* method = methods->at(i);
2637 if (method->name() == name && method->signature() == signature) {
2638 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2639 }
2640 }
2641 return -1;
2642 }
2643 default:
2644 fatal("JVM_GetCPMethodModifiers: illegal constant");
2645 }
2646 ShouldNotReachHere();
2647 return 0;
2648 JVM_END
2651 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2653 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2654 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2655 JVM_END
2658 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2659 JVMWrapper("JVM_IsSameClassPackage");
2660 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2661 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2662 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2663 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2664 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2665 JVM_END
2668 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2670 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2671 JVMWrapper2("JVM_Open (%s)", fname);
2673 //%note jvm_r6
2674 int result = os::open(fname, flags, mode);
2675 if (result >= 0) {
2676 return result;
2677 } else {
2678 switch(errno) {
2679 case EEXIST:
2680 return JVM_EEXIST;
2681 default:
2682 return -1;
2683 }
2684 }
2685 JVM_END
2688 JVM_LEAF(jint, JVM_Close(jint fd))
2689 JVMWrapper2("JVM_Close (0x%x)", fd);
2690 //%note jvm_r6
2691 return os::close(fd);
2692 JVM_END
2695 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2696 JVMWrapper2("JVM_Read (0x%x)", fd);
2698 //%note jvm_r6
2699 return (jint)os::restartable_read(fd, buf, nbytes);
2700 JVM_END
2703 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2704 JVMWrapper2("JVM_Write (0x%x)", fd);
2706 //%note jvm_r6
2707 return (jint)os::write(fd, buf, nbytes);
2708 JVM_END
2711 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2712 JVMWrapper2("JVM_Available (0x%x)", fd);
2713 //%note jvm_r6
2714 return os::available(fd, pbytes);
2715 JVM_END
2718 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2719 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2720 //%note jvm_r6
2721 return os::lseek(fd, offset, whence);
2722 JVM_END
2725 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2726 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2727 return os::ftruncate(fd, length);
2728 JVM_END
2731 JVM_LEAF(jint, JVM_Sync(jint fd))
2732 JVMWrapper2("JVM_Sync (0x%x)", fd);
2733 //%note jvm_r6
2734 return os::fsync(fd);
2735 JVM_END
2738 // Printing support //////////////////////////////////////////////////
2739 extern "C" {
2741 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2742 // see bug 4399518, 4417214
2743 if ((intptr_t)count <= 0) return -1;
2744 return vsnprintf(str, count, fmt, args);
2745 }
2748 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2749 va_list args;
2750 int len;
2751 va_start(args, fmt);
2752 len = jio_vsnprintf(str, count, fmt, args);
2753 va_end(args);
2754 return len;
2755 }
2758 int jio_fprintf(FILE* f, const char *fmt, ...) {
2759 int len;
2760 va_list args;
2761 va_start(args, fmt);
2762 len = jio_vfprintf(f, fmt, args);
2763 va_end(args);
2764 return len;
2765 }
2768 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2769 if (Arguments::vfprintf_hook() != NULL) {
2770 return Arguments::vfprintf_hook()(f, fmt, args);
2771 } else {
2772 return vfprintf(f, fmt, args);
2773 }
2774 }
2777 JNIEXPORT int jio_printf(const char *fmt, ...) {
2778 int len;
2779 va_list args;
2780 va_start(args, fmt);
2781 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2782 va_end(args);
2783 return len;
2784 }
2787 // HotSpot specific jio method
2788 void jio_print(const char* s) {
2789 // Try to make this function as atomic as possible.
2790 if (Arguments::vfprintf_hook() != NULL) {
2791 jio_fprintf(defaultStream::output_stream(), "%s", s);
2792 } else {
2793 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2794 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2795 }
2796 }
2798 } // Extern C
2800 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2802 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2803 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2804 // OSThread objects. The exception to this rule is when the target object is the thread
2805 // doing the operation, in which case we know that the thread won't exit until the
2806 // operation is done (all exits being voluntary). There are a few cases where it is
2807 // rather silly to do operations on yourself, like resuming yourself or asking whether
2808 // you are alive. While these can still happen, they are not subject to deadlocks if
2809 // the lock is held while the operation occurs (this is not the case for suspend, for
2810 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2811 // implementation is local to this file, we always lock Threads_lock for that one.
2813 static void thread_entry(JavaThread* thread, TRAPS) {
2814 HandleMark hm(THREAD);
2815 Handle obj(THREAD, thread->threadObj());
2816 JavaValue result(T_VOID);
2817 JavaCalls::call_virtual(&result,
2818 obj,
2819 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2820 vmSymbols::run_method_name(),
2821 vmSymbols::void_method_signature(),
2822 THREAD);
2823 }
2826 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2827 JVMWrapper("JVM_StartThread");
2828 JavaThread *native_thread = NULL;
2830 // We cannot hold the Threads_lock when we throw an exception,
2831 // due to rank ordering issues. Example: we might need to grab the
2832 // Heap_lock while we construct the exception.
2833 bool throw_illegal_thread_state = false;
2835 // We must release the Threads_lock before we can post a jvmti event
2836 // in Thread::start.
2837 {
2838 // Ensure that the C++ Thread and OSThread structures aren't freed before
2839 // we operate.
2840 MutexLocker mu(Threads_lock);
2842 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2843 // re-starting an already started thread, so we should usually find
2844 // that the JavaThread is null. However for a JNI attached thread
2845 // there is a small window between the Thread object being created
2846 // (with its JavaThread set) and the update to its threadStatus, so we
2847 // have to check for this
2848 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2849 throw_illegal_thread_state = true;
2850 } else {
2851 // We could also check the stillborn flag to see if this thread was already stopped, but
2852 // for historical reasons we let the thread detect that itself when it starts running
2854 jlong size =
2855 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2856 // Allocate the C++ Thread structure and create the native thread. The
2857 // stack size retrieved from java is signed, but the constructor takes
2858 // size_t (an unsigned type), so avoid passing negative values which would
2859 // result in really large stacks.
2860 size_t sz = size > 0 ? (size_t) size : 0;
2861 native_thread = new JavaThread(&thread_entry, sz);
2863 // At this point it may be possible that no osthread was created for the
2864 // JavaThread due to lack of memory. Check for this situation and throw
2865 // an exception if necessary. Eventually we may want to change this so
2866 // that we only grab the lock if the thread was created successfully -
2867 // then we can also do this check and throw the exception in the
2868 // JavaThread constructor.
2869 if (native_thread->osthread() != NULL) {
2870 // Note: the current thread is not being used within "prepare".
2871 native_thread->prepare(jthread);
2872 }
2873 }
2874 }
2876 if (throw_illegal_thread_state) {
2877 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2878 }
2880 assert(native_thread != NULL, "Starting null thread?");
2882 if (native_thread->osthread() == NULL) {
2883 // No one should hold a reference to the 'native_thread'.
2884 delete native_thread;
2885 if (JvmtiExport::should_post_resource_exhausted()) {
2886 JvmtiExport::post_resource_exhausted(
2887 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2888 "unable to create new native thread");
2889 }
2890 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2891 "unable to create new native thread");
2892 }
2894 Thread::start(native_thread);
2896 JVM_END
2898 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2899 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2900 // but is thought to be reliable and simple. In the case, where the receiver is the
2901 // same thread as the sender, no safepoint is needed.
2902 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2903 JVMWrapper("JVM_StopThread");
2905 oop java_throwable = JNIHandles::resolve(throwable);
2906 if (java_throwable == NULL) {
2907 THROW(vmSymbols::java_lang_NullPointerException());
2908 }
2909 oop java_thread = JNIHandles::resolve_non_null(jthread);
2910 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2911 Events::log_exception(JavaThread::current(),
2912 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2913 receiver, (address)java_thread, throwable);
2914 // First check if thread is alive
2915 if (receiver != NULL) {
2916 // Check if exception is getting thrown at self (use oop equality, since the
2917 // target object might exit)
2918 if (java_thread == thread->threadObj()) {
2919 THROW_OOP(java_throwable);
2920 } else {
2921 // Enques a VM_Operation to stop all threads and then deliver the exception...
2922 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2923 }
2924 }
2925 else {
2926 // Either:
2927 // - target thread has not been started before being stopped, or
2928 // - target thread already terminated
2929 // We could read the threadStatus to determine which case it is
2930 // but that is overkill as it doesn't matter. We must set the
2931 // stillborn flag for the first case, and if the thread has already
2932 // exited setting this flag has no affect
2933 java_lang_Thread::set_stillborn(java_thread);
2934 }
2935 JVM_END
2938 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2939 JVMWrapper("JVM_IsThreadAlive");
2941 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2942 return java_lang_Thread::is_alive(thread_oop);
2943 JVM_END
2946 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2947 JVMWrapper("JVM_SuspendThread");
2948 oop java_thread = JNIHandles::resolve_non_null(jthread);
2949 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2951 if (receiver != NULL) {
2952 // thread has run and has not exited (still on threads list)
2954 {
2955 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2956 if (receiver->is_external_suspend()) {
2957 // Don't allow nested external suspend requests. We can't return
2958 // an error from this interface so just ignore the problem.
2959 return;
2960 }
2961 if (receiver->is_exiting()) { // thread is in the process of exiting
2962 return;
2963 }
2964 receiver->set_external_suspend();
2965 }
2967 // java_suspend() will catch threads in the process of exiting
2968 // and will ignore them.
2969 receiver->java_suspend();
2971 // It would be nice to have the following assertion in all the
2972 // time, but it is possible for a racing resume request to have
2973 // resumed this thread right after we suspended it. Temporarily
2974 // enable this assertion if you are chasing a different kind of
2975 // bug.
2976 //
2977 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2978 // receiver->is_being_ext_suspended(), "thread is not suspended");
2979 }
2980 JVM_END
2983 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2984 JVMWrapper("JVM_ResumeThread");
2985 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2986 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2987 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2988 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2989 // looks at it.
2990 MutexLocker ml(Threads_lock);
2991 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2992 if (thr != NULL) {
2993 // the thread has run and is not in the process of exiting
2994 thr->java_resume();
2995 }
2996 JVM_END
2999 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3000 JVMWrapper("JVM_SetThreadPriority");
3001 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3002 MutexLocker ml(Threads_lock);
3003 oop java_thread = JNIHandles::resolve_non_null(jthread);
3004 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3005 JavaThread* thr = java_lang_Thread::thread(java_thread);
3006 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3007 Thread::set_priority(thr, (ThreadPriority)prio);
3008 }
3009 JVM_END
3012 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3013 JVMWrapper("JVM_Yield");
3014 if (os::dont_yield()) return;
3015 #ifndef USDT2
3016 HS_DTRACE_PROBE0(hotspot, thread__yield);
3017 #else /* USDT2 */
3018 HOTSPOT_THREAD_YIELD();
3019 #endif /* USDT2 */
3020 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3021 // Critical for similar threading behaviour
3022 if (ConvertYieldToSleep) {
3023 os::sleep(thread, MinSleepInterval, false);
3024 } else {
3025 os::yield();
3026 }
3027 JVM_END
3030 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3031 JVMWrapper("JVM_Sleep");
3033 if (millis < 0) {
3034 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3035 }
3037 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3038 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3039 }
3041 // Save current thread state and restore it at the end of this block.
3042 // And set new thread state to SLEEPING.
3043 JavaThreadSleepState jtss(thread);
3045 #ifndef USDT2
3046 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3047 #else /* USDT2 */
3048 HOTSPOT_THREAD_SLEEP_BEGIN(
3049 millis);
3050 #endif /* USDT2 */
3052 EventThreadSleep event;
3054 if (millis == 0) {
3055 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3056 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3057 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3058 // for SOLARIS
3059 if (ConvertSleepToYield) {
3060 os::yield();
3061 } else {
3062 ThreadState old_state = thread->osthread()->get_state();
3063 thread->osthread()->set_state(SLEEPING);
3064 os::sleep(thread, MinSleepInterval, false);
3065 thread->osthread()->set_state(old_state);
3066 }
3067 } else {
3068 ThreadState old_state = thread->osthread()->get_state();
3069 thread->osthread()->set_state(SLEEPING);
3070 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3071 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3072 // us while we were sleeping. We do not overwrite those.
3073 if (!HAS_PENDING_EXCEPTION) {
3074 if (event.should_commit()) {
3075 event.set_time(millis);
3076 event.commit();
3077 }
3078 #ifndef USDT2
3079 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3080 #else /* USDT2 */
3081 HOTSPOT_THREAD_SLEEP_END(
3082 1);
3083 #endif /* USDT2 */
3084 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3085 // to properly restore the thread state. That's likely wrong.
3086 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3087 }
3088 }
3089 thread->osthread()->set_state(old_state);
3090 }
3091 if (event.should_commit()) {
3092 event.set_time(millis);
3093 event.commit();
3094 }
3095 #ifndef USDT2
3096 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3097 #else /* USDT2 */
3098 HOTSPOT_THREAD_SLEEP_END(
3099 0);
3100 #endif /* USDT2 */
3101 JVM_END
3103 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3104 JVMWrapper("JVM_CurrentThread");
3105 oop jthread = thread->threadObj();
3106 assert (thread != NULL, "no current thread!");
3107 return JNIHandles::make_local(env, jthread);
3108 JVM_END
3111 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3112 JVMWrapper("JVM_CountStackFrames");
3114 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3115 oop java_thread = JNIHandles::resolve_non_null(jthread);
3116 bool throw_illegal_thread_state = false;
3117 int count = 0;
3119 {
3120 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3121 // We need to re-resolve the java_thread, since a GC might have happened during the
3122 // acquire of the lock
3123 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3125 if (thr == NULL) {
3126 // do nothing
3127 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3128 // Check whether this java thread has been suspended already. If not, throws
3129 // IllegalThreadStateException. We defer to throw that exception until
3130 // Threads_lock is released since loading exception class has to leave VM.
3131 // The correct way to test a thread is actually suspended is
3132 // wait_for_ext_suspend_completion(), but we can't call that while holding
3133 // the Threads_lock. The above tests are sufficient for our purposes
3134 // provided the walkability of the stack is stable - which it isn't
3135 // 100% but close enough for most practical purposes.
3136 throw_illegal_thread_state = true;
3137 } else {
3138 // Count all java activation, i.e., number of vframes
3139 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3140 // Native frames are not counted
3141 if (!vfst.method()->is_native()) count++;
3142 }
3143 }
3144 }
3146 if (throw_illegal_thread_state) {
3147 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3148 "this thread is not suspended");
3149 }
3150 return count;
3151 JVM_END
3153 // Consider: A better way to implement JVM_Interrupt() is to acquire
3154 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3155 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3156 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3157 // outside the critical section. Threads_lock is hot so we want to minimize
3158 // the hold-time. A cleaner interface would be to decompose interrupt into
3159 // two steps. The 1st phase, performed under Threads_lock, would return
3160 // a closure that'd be invoked after Threads_lock was dropped.
3161 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3162 // admit spurious wakeups.
3164 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3165 JVMWrapper("JVM_Interrupt");
3167 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3168 oop java_thread = JNIHandles::resolve_non_null(jthread);
3169 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3170 // We need to re-resolve the java_thread, since a GC might have happened during the
3171 // acquire of the lock
3172 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3173 if (thr != NULL) {
3174 Thread::interrupt(thr);
3175 }
3176 JVM_END
3179 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3180 JVMWrapper("JVM_IsInterrupted");
3182 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3183 oop java_thread = JNIHandles::resolve_non_null(jthread);
3184 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3185 // We need to re-resolve the java_thread, since a GC might have happened during the
3186 // acquire of the lock
3187 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3188 if (thr == NULL) {
3189 return JNI_FALSE;
3190 } else {
3191 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3192 }
3193 JVM_END
3196 // Return true iff the current thread has locked the object passed in
3198 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3199 JVMWrapper("JVM_HoldsLock");
3200 assert(THREAD->is_Java_thread(), "sanity check");
3201 if (obj == NULL) {
3202 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3203 }
3204 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3205 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3206 JVM_END
3209 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3210 JVMWrapper("JVM_DumpAllStacks");
3211 VM_PrintThreads op;
3212 VMThread::execute(&op);
3213 if (JvmtiExport::should_post_data_dump()) {
3214 JvmtiExport::post_data_dump();
3215 }
3216 JVM_END
3218 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3219 JVMWrapper("JVM_SetNativeThreadName");
3220 ResourceMark rm(THREAD);
3221 oop java_thread = JNIHandles::resolve_non_null(jthread);
3222 JavaThread* thr = java_lang_Thread::thread(java_thread);
3223 // Thread naming only supported for the current thread, doesn't work for
3224 // target threads.
3225 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3226 // we don't set the name of an attached thread to avoid stepping
3227 // on other programs
3228 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3229 os::set_native_thread_name(thread_name);
3230 }
3231 JVM_END
3233 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3235 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3236 assert(jthread->is_Java_thread(), "must be a Java thread");
3237 if (jthread->privileged_stack_top() == NULL) return false;
3238 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3239 oop loader = jthread->privileged_stack_top()->class_loader();
3240 if (loader == NULL) return true;
3241 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3242 if (trusted) return true;
3243 }
3244 return false;
3245 }
3247 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3248 JVMWrapper("JVM_CurrentLoadedClass");
3249 ResourceMark rm(THREAD);
3251 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3252 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3253 bool trusted = is_trusted_frame(thread, &vfst);
3254 if (trusted) return NULL;
3256 Method* m = vfst.method();
3257 if (!m->is_native()) {
3258 InstanceKlass* holder = m->method_holder();
3259 oop loader = holder->class_loader();
3260 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3261 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3262 }
3263 }
3264 }
3265 return NULL;
3266 JVM_END
3269 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3270 JVMWrapper("JVM_CurrentClassLoader");
3271 ResourceMark rm(THREAD);
3273 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3275 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3276 bool trusted = is_trusted_frame(thread, &vfst);
3277 if (trusted) return NULL;
3279 Method* m = vfst.method();
3280 if (!m->is_native()) {
3281 InstanceKlass* holder = m->method_holder();
3282 assert(holder->is_klass(), "just checking");
3283 oop loader = holder->class_loader();
3284 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3285 return JNIHandles::make_local(env, loader);
3286 }
3287 }
3288 }
3289 return NULL;
3290 JVM_END
3293 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3294 JVMWrapper("JVM_GetClassContext");
3295 ResourceMark rm(THREAD);
3296 JvmtiVMObjectAllocEventCollector oam;
3297 vframeStream vfst(thread);
3299 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3300 // This must only be called from SecurityManager.getClassContext
3301 Method* m = vfst.method();
3302 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3303 m->name() == vmSymbols::getClassContext_name() &&
3304 m->signature() == vmSymbols::void_class_array_signature())) {
3305 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3306 }
3307 }
3309 // Collect method holders
3310 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3311 for (; !vfst.at_end(); vfst.security_next()) {
3312 Method* m = vfst.method();
3313 // Native frames are not returned
3314 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3315 Klass* holder = m->method_holder();
3316 assert(holder->is_klass(), "just checking");
3317 klass_array->append(holder);
3318 }
3319 }
3321 // Create result array of type [Ljava/lang/Class;
3322 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3323 // Fill in mirrors corresponding to method holders
3324 for (int i = 0; i < klass_array->length(); i++) {
3325 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3326 }
3328 return (jobjectArray) JNIHandles::make_local(env, result);
3329 JVM_END
3332 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3333 JVMWrapper("JVM_ClassDepth");
3334 ResourceMark rm(THREAD);
3335 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3336 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3338 const char* str = java_lang_String::as_utf8_string(class_name_str());
3339 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3340 if (class_name_sym == NULL) {
3341 return -1;
3342 }
3344 int depth = 0;
3346 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3347 if (!vfst.method()->is_native()) {
3348 InstanceKlass* holder = vfst.method()->method_holder();
3349 assert(holder->is_klass(), "just checking");
3350 if (holder->name() == class_name_sym) {
3351 return depth;
3352 }
3353 depth++;
3354 }
3355 }
3356 return -1;
3357 JVM_END
3360 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3361 JVMWrapper("JVM_ClassLoaderDepth");
3362 ResourceMark rm(THREAD);
3363 int depth = 0;
3364 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3365 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3366 bool trusted = is_trusted_frame(thread, &vfst);
3367 if (trusted) return -1;
3369 Method* m = vfst.method();
3370 if (!m->is_native()) {
3371 InstanceKlass* holder = m->method_holder();
3372 assert(holder->is_klass(), "just checking");
3373 oop loader = holder->class_loader();
3374 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3375 return depth;
3376 }
3377 depth++;
3378 }
3379 }
3380 return -1;
3381 JVM_END
3384 // java.lang.Package ////////////////////////////////////////////////////////////////
3387 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3388 JVMWrapper("JVM_GetSystemPackage");
3389 ResourceMark rm(THREAD);
3390 JvmtiVMObjectAllocEventCollector oam;
3391 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3392 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3393 return (jstring) JNIHandles::make_local(result);
3394 JVM_END
3397 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3398 JVMWrapper("JVM_GetSystemPackages");
3399 JvmtiVMObjectAllocEventCollector oam;
3400 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3401 return (jobjectArray) JNIHandles::make_local(result);
3402 JVM_END
3405 // ObjectInputStream ///////////////////////////////////////////////////////////////
3407 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3408 if (current_class == NULL) {
3409 return true;
3410 }
3411 if ((current_class == field_class) || access.is_public()) {
3412 return true;
3413 }
3415 if (access.is_protected()) {
3416 // See if current_class is a subclass of field_class
3417 if (current_class->is_subclass_of(field_class)) {
3418 return true;
3419 }
3420 }
3422 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3423 }
3426 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3427 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3428 JVMWrapper("JVM_AllocateNewObject");
3429 JvmtiVMObjectAllocEventCollector oam;
3430 // Receiver is not used
3431 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3432 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3434 // Cannot instantiate primitive types
3435 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3436 ResourceMark rm(THREAD);
3437 THROW_0(vmSymbols::java_lang_InvalidClassException());
3438 }
3440 // Arrays not allowed here, must use JVM_AllocateNewArray
3441 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3442 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3443 ResourceMark rm(THREAD);
3444 THROW_0(vmSymbols::java_lang_InvalidClassException());
3445 }
3447 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3448 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3450 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3452 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3453 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3455 // Make sure klass is initialized, since we are about to instantiate one of them.
3456 curr_klass->initialize(CHECK_NULL);
3458 methodHandle m (THREAD,
3459 init_klass->find_method(vmSymbols::object_initializer_name(),
3460 vmSymbols::void_method_signature()));
3461 if (m.is_null()) {
3462 ResourceMark rm(THREAD);
3463 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3464 Method::name_and_sig_as_C_string(init_klass(),
3465 vmSymbols::object_initializer_name(),
3466 vmSymbols::void_method_signature()));
3467 }
3469 if (curr_klass == init_klass && !m->is_public()) {
3470 // Calling the constructor for class 'curr_klass'.
3471 // Only allow calls to a public no-arg constructor.
3472 // This path corresponds to creating an Externalizable object.
3473 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3474 }
3476 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3477 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3478 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3479 }
3481 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3482 // Call constructor m. This might call a constructor higher up in the hierachy
3483 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3485 return JNIHandles::make_local(obj());
3486 JVM_END
3489 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3490 JVMWrapper("JVM_AllocateNewArray");
3491 JvmtiVMObjectAllocEventCollector oam;
3492 oop mirror = JNIHandles::resolve_non_null(currClass);
3494 if (java_lang_Class::is_primitive(mirror)) {
3495 THROW_0(vmSymbols::java_lang_InvalidClassException());
3496 }
3497 Klass* k = java_lang_Class::as_Klass(mirror);
3498 oop result;
3500 if (k->oop_is_typeArray()) {
3501 // typeArray
3502 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3503 } else if (k->oop_is_objArray()) {
3504 // objArray
3505 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3506 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3507 result = oak->allocate(length, CHECK_NULL);
3508 } else {
3509 THROW_0(vmSymbols::java_lang_InvalidClassException());
3510 }
3511 return JNIHandles::make_local(env, result);
3512 JVM_END
3515 // Return the first non-null class loader up the execution stack, or null
3516 // if only code from the null class loader is on the stack.
3518 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3519 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3520 // UseNewReflection
3521 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3522 oop loader = vfst.method()->method_holder()->class_loader();
3523 if (loader != NULL) {
3524 return JNIHandles::make_local(env, loader);
3525 }
3526 }
3527 return NULL;
3528 JVM_END
3531 // Load a class relative to the most recent class on the stack with a non-null
3532 // classloader.
3533 // This function has been deprecated and should not be considered part of the
3534 // specified JVM interface.
3536 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3537 jclass currClass, jstring currClassName))
3538 JVMWrapper("JVM_LoadClass0");
3539 // Receiver is not used
3540 ResourceMark rm(THREAD);
3542 // Class name argument is not guaranteed to be in internal format
3543 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3544 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3546 const char* str = java_lang_String::as_utf8_string(string());
3548 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3549 // It's impossible to create this class; the name cannot fit
3550 // into the constant pool.
3551 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3552 }
3554 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3555 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3556 // Find the most recent class on the stack with a non-null classloader
3557 oop loader = NULL;
3558 oop protection_domain = NULL;
3559 if (curr_klass.is_null()) {
3560 for (vframeStream vfst(thread);
3561 !vfst.at_end() && loader == NULL;
3562 vfst.next()) {
3563 if (!vfst.method()->is_native()) {
3564 InstanceKlass* holder = vfst.method()->method_holder();
3565 loader = holder->class_loader();
3566 protection_domain = holder->protection_domain();
3567 }
3568 }
3569 } else {
3570 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3571 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3572 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3573 }
3574 Handle h_loader(THREAD, loader);
3575 Handle h_prot (THREAD, protection_domain);
3576 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3577 false, thread);
3578 if (TraceClassResolution && result != NULL) {
3579 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3580 }
3581 return result;
3582 JVM_END
3585 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3588 // resolve array handle and check arguments
3589 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3590 if (arr == NULL) {
3591 THROW_0(vmSymbols::java_lang_NullPointerException());
3592 }
3593 oop a = JNIHandles::resolve_non_null(arr);
3594 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3595 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3596 }
3597 return arrayOop(a);
3598 }
3601 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3602 JVMWrapper("JVM_GetArrayLength");
3603 arrayOop a = check_array(env, arr, false, CHECK_0);
3604 return a->length();
3605 JVM_END
3608 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3609 JVMWrapper("JVM_Array_Get");
3610 JvmtiVMObjectAllocEventCollector oam;
3611 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3612 jvalue value;
3613 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3614 oop box = Reflection::box(&value, type, CHECK_NULL);
3615 return JNIHandles::make_local(env, box);
3616 JVM_END
3619 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3620 JVMWrapper("JVM_GetPrimitiveArrayElement");
3621 jvalue value;
3622 value.i = 0; // to initialize value before getting used in CHECK
3623 arrayOop a = check_array(env, arr, true, CHECK_(value));
3624 assert(a->is_typeArray(), "just checking");
3625 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3626 BasicType wide_type = (BasicType) wCode;
3627 if (type != wide_type) {
3628 Reflection::widen(&value, type, wide_type, CHECK_(value));
3629 }
3630 return value;
3631 JVM_END
3634 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3635 JVMWrapper("JVM_SetArrayElement");
3636 arrayOop a = check_array(env, arr, false, CHECK);
3637 oop box = JNIHandles::resolve(val);
3638 jvalue value;
3639 value.i = 0; // to initialize value before getting used in CHECK
3640 BasicType value_type;
3641 if (a->is_objArray()) {
3642 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3643 value_type = Reflection::unbox_for_regular_object(box, &value);
3644 } else {
3645 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3646 }
3647 Reflection::array_set(&value, a, index, value_type, CHECK);
3648 JVM_END
3651 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3652 JVMWrapper("JVM_SetPrimitiveArrayElement");
3653 arrayOop a = check_array(env, arr, true, CHECK);
3654 assert(a->is_typeArray(), "just checking");
3655 BasicType value_type = (BasicType) vCode;
3656 Reflection::array_set(&v, a, index, value_type, CHECK);
3657 JVM_END
3660 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3661 JVMWrapper("JVM_NewArray");
3662 JvmtiVMObjectAllocEventCollector oam;
3663 oop element_mirror = JNIHandles::resolve(eltClass);
3664 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3665 return JNIHandles::make_local(env, result);
3666 JVM_END
3669 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3670 JVMWrapper("JVM_NewMultiArray");
3671 JvmtiVMObjectAllocEventCollector oam;
3672 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3673 oop element_mirror = JNIHandles::resolve(eltClass);
3674 assert(dim_array->is_typeArray(), "just checking");
3675 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3676 return JNIHandles::make_local(env, result);
3677 JVM_END
3680 // Networking library support ////////////////////////////////////////////////////////////////////
3682 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3683 JVMWrapper("JVM_InitializeSocketLibrary");
3684 return 0;
3685 JVM_END
3688 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3689 JVMWrapper("JVM_Socket");
3690 return os::socket(domain, type, protocol);
3691 JVM_END
3694 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3695 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3696 //%note jvm_r6
3697 return os::socket_close(fd);
3698 JVM_END
3701 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3702 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3703 //%note jvm_r6
3704 return os::socket_shutdown(fd, howto);
3705 JVM_END
3708 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3709 JVMWrapper2("JVM_Recv (0x%x)", fd);
3710 //%note jvm_r6
3711 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3712 JVM_END
3715 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3716 JVMWrapper2("JVM_Send (0x%x)", fd);
3717 //%note jvm_r6
3718 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3719 JVM_END
3722 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3723 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3724 //%note jvm_r6
3725 return os::timeout(fd, timeout);
3726 JVM_END
3729 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3730 JVMWrapper2("JVM_Listen (0x%x)", fd);
3731 //%note jvm_r6
3732 return os::listen(fd, count);
3733 JVM_END
3736 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3737 JVMWrapper2("JVM_Connect (0x%x)", fd);
3738 //%note jvm_r6
3739 return os::connect(fd, him, (socklen_t)len);
3740 JVM_END
3743 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3744 JVMWrapper2("JVM_Bind (0x%x)", fd);
3745 //%note jvm_r6
3746 return os::bind(fd, him, (socklen_t)len);
3747 JVM_END
3750 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3751 JVMWrapper2("JVM_Accept (0x%x)", fd);
3752 //%note jvm_r6
3753 socklen_t socklen = (socklen_t)(*len);
3754 jint result = os::accept(fd, him, &socklen);
3755 *len = (jint)socklen;
3756 return result;
3757 JVM_END
3760 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3761 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3762 //%note jvm_r6
3763 socklen_t socklen = (socklen_t)(*fromlen);
3764 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3765 *fromlen = (int)socklen;
3766 return result;
3767 JVM_END
3770 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3771 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3772 //%note jvm_r6
3773 socklen_t socklen = (socklen_t)(*len);
3774 jint result = os::get_sock_name(fd, him, &socklen);
3775 *len = (int)socklen;
3776 return result;
3777 JVM_END
3780 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3781 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3782 //%note jvm_r6
3783 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3784 JVM_END
3787 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3788 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3789 //%note jvm_r6
3790 return os::socket_available(fd, pbytes);
3791 JVM_END
3794 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3795 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3796 //%note jvm_r6
3797 socklen_t socklen = (socklen_t)(*optlen);
3798 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3799 *optlen = (int)socklen;
3800 return result;
3801 JVM_END
3804 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3805 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3806 //%note jvm_r6
3807 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3808 JVM_END
3811 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3812 JVMWrapper("JVM_GetHostName");
3813 return os::get_host_name(name, namelen);
3814 JVM_END
3817 // Library support ///////////////////////////////////////////////////////////////////////////
3819 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3820 //%note jvm_ct
3821 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3822 char ebuf[1024];
3823 void *load_result;
3824 {
3825 ThreadToNativeFromVM ttnfvm(thread);
3826 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3827 }
3828 if (load_result == NULL) {
3829 char msg[1024];
3830 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3831 // Since 'ebuf' may contain a string encoded using
3832 // platform encoding scheme, we need to pass
3833 // Exceptions::unsafe_to_utf8 to the new_exception method
3834 // as the last argument. See bug 6367357.
3835 Handle h_exception =
3836 Exceptions::new_exception(thread,
3837 vmSymbols::java_lang_UnsatisfiedLinkError(),
3838 msg, Exceptions::unsafe_to_utf8);
3840 THROW_HANDLE_0(h_exception);
3841 }
3842 return load_result;
3843 JVM_END
3846 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3847 JVMWrapper("JVM_UnloadLibrary");
3848 os::dll_unload(handle);
3849 JVM_END
3852 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3853 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3854 return os::dll_lookup(handle, name);
3855 JVM_END
3858 // Floating point support ////////////////////////////////////////////////////////////////////
3860 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3861 JVMWrapper("JVM_IsNaN");
3862 return g_isnan(a);
3863 JVM_END
3866 // JNI version ///////////////////////////////////////////////////////////////////////////////
3868 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3869 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3870 return Threads::is_supported_jni_version_including_1_1(version);
3871 JVM_END
3874 // String support ///////////////////////////////////////////////////////////////////////////
3876 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3877 JVMWrapper("JVM_InternString");
3878 JvmtiVMObjectAllocEventCollector oam;
3879 if (str == NULL) return NULL;
3880 oop string = JNIHandles::resolve_non_null(str);
3881 oop result = StringTable::intern(string, CHECK_NULL);
3882 return (jstring) JNIHandles::make_local(env, result);
3883 JVM_END
3886 // Raw monitor support //////////////////////////////////////////////////////////////////////
3888 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3889 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3890 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3891 // that only works with java threads.
3894 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3895 VM_Exit::block_if_vm_exited();
3896 JVMWrapper("JVM_RawMonitorCreate");
3897 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3898 }
3901 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3902 VM_Exit::block_if_vm_exited();
3903 JVMWrapper("JVM_RawMonitorDestroy");
3904 delete ((Mutex*) mon);
3905 }
3908 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3909 VM_Exit::block_if_vm_exited();
3910 JVMWrapper("JVM_RawMonitorEnter");
3911 ((Mutex*) mon)->jvm_raw_lock();
3912 return 0;
3913 }
3916 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3917 VM_Exit::block_if_vm_exited();
3918 JVMWrapper("JVM_RawMonitorExit");
3919 ((Mutex*) mon)->jvm_raw_unlock();
3920 }
3923 // Support for Serialization
3925 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3926 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3927 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3928 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3930 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3931 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3932 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3933 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3936 void initialize_converter_functions() {
3937 if (JDK_Version::is_gte_jdk14x_version()) {
3938 // These functions only exist for compatibility with 1.3.1 and earlier
3939 return;
3940 }
3942 // called from universe_post_init()
3943 assert(
3944 int_bits_to_float_fn == NULL &&
3945 long_bits_to_double_fn == NULL &&
3946 float_to_int_bits_fn == NULL &&
3947 double_to_long_bits_fn == NULL ,
3948 "initialization done twice"
3949 );
3950 // initialize
3951 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3952 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3953 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3954 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3955 // verify
3956 assert(
3957 int_bits_to_float_fn != NULL &&
3958 long_bits_to_double_fn != NULL &&
3959 float_to_int_bits_fn != NULL &&
3960 double_to_long_bits_fn != NULL ,
3961 "initialization failed"
3962 );
3963 }
3966 // Serialization
3967 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3968 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3969 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3971 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3972 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3973 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3974 oop o = JNIHandles::resolve(obj);
3976 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3977 THROW(vmSymbols::java_lang_NullPointerException());
3978 }
3980 jsize nfids = fids->length();
3981 if (nfids == 0) return;
3983 if (tcodes->length() < nfids) {
3984 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3985 }
3987 jsize off = 0;
3988 /* loop through fields, setting values */
3989 for (jsize i = 0; i < nfids; i++) {
3990 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3991 int field_offset;
3992 if (fid != NULL) {
3993 // NULL is a legal value for fid, but retrieving the field offset
3994 // trigger assertion in that case
3995 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3996 }
3998 switch (tcodes->char_at(i)) {
3999 case 'Z':
4000 if (fid != NULL) {
4001 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
4002 o->bool_field_put(field_offset, val);
4003 }
4004 off++;
4005 break;
4007 case 'B':
4008 if (fid != NULL) {
4009 o->byte_field_put(field_offset, dbuf->byte_at(off));
4010 }
4011 off++;
4012 break;
4014 case 'C':
4015 if (fid != NULL) {
4016 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
4017 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
4018 o->char_field_put(field_offset, val);
4019 }
4020 off += 2;
4021 break;
4023 case 'S':
4024 if (fid != NULL) {
4025 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
4026 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
4027 o->short_field_put(field_offset, val);
4028 }
4029 off += 2;
4030 break;
4032 case 'I':
4033 if (fid != NULL) {
4034 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4035 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4036 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4037 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4038 o->int_field_put(field_offset, ival);
4039 }
4040 off += 4;
4041 break;
4043 case 'F':
4044 if (fid != NULL) {
4045 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4046 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4047 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4048 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4049 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
4050 o->float_field_put(field_offset, fval);
4051 }
4052 off += 4;
4053 break;
4055 case 'J':
4056 if (fid != NULL) {
4057 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4058 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4059 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4060 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4061 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4062 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4063 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4064 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4065 o->long_field_put(field_offset, lval);
4066 }
4067 off += 8;
4068 break;
4070 case 'D':
4071 if (fid != NULL) {
4072 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4073 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4074 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4075 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4076 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4077 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4078 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4079 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4080 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
4081 o->double_field_put(field_offset, dval);
4082 }
4083 off += 8;
4084 break;
4086 default:
4087 // Illegal typecode
4088 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4089 }
4090 }
4091 JVM_END
4094 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4095 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4096 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4098 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4099 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
4100 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
4101 oop o = JNIHandles::resolve(obj);
4103 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4104 THROW(vmSymbols::java_lang_NullPointerException());
4105 }
4107 jsize nfids = fids->length();
4108 if (nfids == 0) return;
4110 if (tcodes->length() < nfids) {
4111 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4112 }
4114 /* loop through fields, fetching values */
4115 jsize off = 0;
4116 for (jsize i = 0; i < nfids; i++) {
4117 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4118 if (fid == NULL) {
4119 THROW(vmSymbols::java_lang_NullPointerException());
4120 }
4121 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4123 switch (tcodes->char_at(i)) {
4124 case 'Z':
4125 {
4126 jboolean val = o->bool_field(field_offset);
4127 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4128 }
4129 break;
4131 case 'B':
4132 dbuf->byte_at_put(off++, o->byte_field(field_offset));
4133 break;
4135 case 'C':
4136 {
4137 jchar val = o->char_field(field_offset);
4138 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4139 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4140 }
4141 break;
4143 case 'S':
4144 {
4145 jshort val = o->short_field(field_offset);
4146 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4147 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4148 }
4149 break;
4151 case 'I':
4152 {
4153 jint val = o->int_field(field_offset);
4154 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4155 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4156 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4157 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4158 }
4159 break;
4161 case 'F':
4162 {
4163 jfloat fval = o->float_field(field_offset);
4164 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4165 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4166 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4167 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4168 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4169 }
4170 break;
4172 case 'J':
4173 {
4174 jlong val = o->long_field(field_offset);
4175 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4176 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4177 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4178 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4179 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4180 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4181 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4182 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4183 }
4184 break;
4186 case 'D':
4187 {
4188 jdouble dval = o->double_field(field_offset);
4189 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4190 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4191 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4192 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4193 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4194 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4195 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4196 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4197 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4198 }
4199 break;
4201 default:
4202 // Illegal typecode
4203 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4204 }
4205 }
4206 JVM_END
4209 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4211 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4212 // Security Note:
4213 // The Java level wrapper will perform the necessary security check allowing
4214 // us to pass the NULL as the initiating class loader.
4215 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4217 KlassHandle klass_handle(THREAD, klass);
4218 // Check if we should initialize the class
4219 if (init && klass_handle->oop_is_instance()) {
4220 klass_handle->initialize(CHECK_NULL);
4221 }
4222 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4223 }
4226 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4228 #ifndef PRODUCT
4230 extern "C" {
4231 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4232 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4233 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4234 }
4236 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4237 JVMWrapper("JVM_AccessBoolVMFlag");
4238 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4239 JVM_END
4241 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4242 JVMWrapper("JVM_AccessVMIntFlag");
4243 intx v;
4244 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4245 *value = (jint)v;
4246 return result;
4247 JVM_END
4250 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4251 JVMWrapper("JVM_VMBreakPoint");
4252 oop the_obj = JNIHandles::resolve(obj);
4253 BREAKPOINT;
4254 JVM_END
4257 #endif
4260 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4262 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4263 JVMWrapper("JVM_InvokeMethod");
4264 Handle method_handle;
4265 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4266 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4267 Handle receiver(THREAD, JNIHandles::resolve(obj));
4268 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4269 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4270 jobject res = JNIHandles::make_local(env, result);
4271 if (JvmtiExport::should_post_vm_object_alloc()) {
4272 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4273 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4274 if (java_lang_Class::is_primitive(ret_type)) {
4275 // Only for primitive type vm allocates memory for java object.
4276 // See box() method.
4277 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4278 }
4279 }
4280 return res;
4281 } else {
4282 THROW_0(vmSymbols::java_lang_StackOverflowError());
4283 }
4284 JVM_END
4287 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4288 JVMWrapper("JVM_NewInstanceFromConstructor");
4289 oop constructor_mirror = JNIHandles::resolve(c);
4290 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4291 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4292 jobject res = JNIHandles::make_local(env, result);
4293 if (JvmtiExport::should_post_vm_object_alloc()) {
4294 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4295 }
4296 return res;
4297 JVM_END
4299 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4301 JVM_LEAF(jboolean, JVM_SupportsCX8())
4302 JVMWrapper("JVM_SupportsCX8");
4303 return VM_Version::supports_cx8();
4304 JVM_END
4307 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4308 JVMWrapper("JVM_CX8Field");
4309 jlong res;
4310 oop o = JNIHandles::resolve(obj);
4311 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4312 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4314 assert(VM_Version::supports_cx8(), "cx8 not supported");
4315 res = Atomic::cmpxchg(newVal, addr, oldVal);
4317 return res == oldVal;
4318 JVM_END
4320 // DTrace ///////////////////////////////////////////////////////////////////
4322 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4323 JVMWrapper("JVM_DTraceGetVersion");
4324 return (jint)JVM_TRACING_DTRACE_VERSION;
4325 JVM_END
4327 JVM_ENTRY(jlong,JVM_DTraceActivate(
4328 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4329 JVM_DTraceProvider* providers))
4330 JVMWrapper("JVM_DTraceActivate");
4331 return DTraceJSDT::activate(
4332 version, module_name, providers_count, providers, CHECK_0);
4333 JVM_END
4335 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4336 JVMWrapper("JVM_DTraceIsProbeEnabled");
4337 return DTraceJSDT::is_probe_enabled(method);
4338 JVM_END
4340 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4341 JVMWrapper("JVM_DTraceDispose");
4342 DTraceJSDT::dispose(handle);
4343 JVM_END
4345 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4346 JVMWrapper("JVM_DTraceIsSupported");
4347 return DTraceJSDT::is_supported();
4348 JVM_END
4350 // Returns an array of all live Thread objects (VM internal JavaThreads,
4351 // jvmti agent threads, and JNI attaching threads are skipped)
4352 // See CR 6404306 regarding JNI attaching threads
4353 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4354 ResourceMark rm(THREAD);
4355 ThreadsListEnumerator tle(THREAD, false, false);
4356 JvmtiVMObjectAllocEventCollector oam;
4358 int num_threads = tle.num_threads();
4359 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4360 objArrayHandle threads_ah(THREAD, r);
4362 for (int i = 0; i < num_threads; i++) {
4363 Handle h = tle.get_threadObj(i);
4364 threads_ah->obj_at_put(i, h());
4365 }
4367 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4368 JVM_END
4371 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4372 // Return StackTraceElement[][], each element is the stack trace of a thread in
4373 // the corresponding entry in the given threads array
4374 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4375 JVMWrapper("JVM_DumpThreads");
4376 JvmtiVMObjectAllocEventCollector oam;
4378 // Check if threads is null
4379 if (threads == NULL) {
4380 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4381 }
4383 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4384 objArrayHandle ah(THREAD, a);
4385 int num_threads = ah->length();
4386 // check if threads is non-empty array
4387 if (num_threads == 0) {
4388 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4389 }
4391 // check if threads is not an array of objects of Thread class
4392 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4393 if (k != SystemDictionary::Thread_klass()) {
4394 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4395 }
4397 ResourceMark rm(THREAD);
4399 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4400 for (int i = 0; i < num_threads; i++) {
4401 oop thread_obj = ah->obj_at(i);
4402 instanceHandle h(THREAD, (instanceOop) thread_obj);
4403 thread_handle_array->append(h);
4404 }
4406 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4407 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4409 JVM_END
4411 // JVM monitoring and management support
4412 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4413 return Management::get_jmm_interface(version);
4414 JVM_END
4416 // com.sun.tools.attach.VirtualMachine agent properties support
4417 //
4418 // Initialize the agent properties with the properties maintained in the VM
4419 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4420 JVMWrapper("JVM_InitAgentProperties");
4421 ResourceMark rm;
4423 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4425 PUTPROP(props, "sun.java.command", Arguments::java_command());
4426 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4427 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4428 return properties;
4429 JVM_END
4431 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4432 {
4433 JVMWrapper("JVM_GetEnclosingMethodInfo");
4434 JvmtiVMObjectAllocEventCollector oam;
4436 if (ofClass == NULL) {
4437 return NULL;
4438 }
4439 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4440 // Special handling for primitive objects
4441 if (java_lang_Class::is_primitive(mirror())) {
4442 return NULL;
4443 }
4444 Klass* k = java_lang_Class::as_Klass(mirror());
4445 if (!k->oop_is_instance()) {
4446 return NULL;
4447 }
4448 instanceKlassHandle ik_h(THREAD, k);
4449 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4450 if (encl_method_class_idx == 0) {
4451 return NULL;
4452 }
4453 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4454 objArrayHandle dest(THREAD, dest_o);
4455 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4456 dest->obj_at_put(0, enc_k->java_mirror());
4457 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4458 if (encl_method_method_idx != 0) {
4459 Symbol* sym = ik_h->constants()->symbol_at(
4460 extract_low_short_from_int(
4461 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4462 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4463 dest->obj_at_put(1, str());
4464 sym = ik_h->constants()->symbol_at(
4465 extract_high_short_from_int(
4466 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4467 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4468 dest->obj_at_put(2, str());
4469 }
4470 return (jobjectArray) JNIHandles::make_local(dest());
4471 }
4472 JVM_END
4474 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4475 jint javaThreadState))
4476 {
4477 // If new thread states are added in future JDK and VM versions,
4478 // this should check if the JDK version is compatible with thread
4479 // states supported by the VM. Return NULL if not compatible.
4480 //
4481 // This function must map the VM java_lang_Thread::ThreadStatus
4482 // to the Java thread state that the JDK supports.
4483 //
4485 typeArrayHandle values_h;
4486 switch (javaThreadState) {
4487 case JAVA_THREAD_STATE_NEW : {
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::NEW);
4491 break;
4492 }
4493 case JAVA_THREAD_STATE_RUNNABLE : {
4494 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4495 values_h = typeArrayHandle(THREAD, r);
4496 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4497 break;
4498 }
4499 case JAVA_THREAD_STATE_BLOCKED : {
4500 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4501 values_h = typeArrayHandle(THREAD, r);
4502 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4503 break;
4504 }
4505 case JAVA_THREAD_STATE_WAITING : {
4506 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4507 values_h = typeArrayHandle(THREAD, r);
4508 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4509 values_h->int_at_put(1, java_lang_Thread::PARKED);
4510 break;
4511 }
4512 case JAVA_THREAD_STATE_TIMED_WAITING : {
4513 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4514 values_h = typeArrayHandle(THREAD, r);
4515 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4516 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4517 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4518 break;
4519 }
4520 case JAVA_THREAD_STATE_TERMINATED : {
4521 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4522 values_h = typeArrayHandle(THREAD, r);
4523 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4524 break;
4525 }
4526 default:
4527 // Unknown state - probably incompatible JDK version
4528 return NULL;
4529 }
4531 return (jintArray) JNIHandles::make_local(env, values_h());
4532 }
4533 JVM_END
4536 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4537 jint javaThreadState,
4538 jintArray values))
4539 {
4540 // If new thread states are added in future JDK and VM versions,
4541 // this should check if the JDK version is compatible with thread
4542 // states supported by the VM. Return NULL if not compatible.
4543 //
4544 // This function must map the VM java_lang_Thread::ThreadStatus
4545 // to the Java thread state that the JDK supports.
4546 //
4548 ResourceMark rm;
4550 // Check if threads is null
4551 if (values == NULL) {
4552 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4553 }
4555 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4556 typeArrayHandle values_h(THREAD, v);
4558 objArrayHandle names_h;
4559 switch (javaThreadState) {
4560 case JAVA_THREAD_STATE_NEW : {
4561 assert(values_h->length() == 1 &&
4562 values_h->int_at(0) == java_lang_Thread::NEW,
4563 "Invalid threadStatus value");
4565 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4566 1, /* only 1 substate */
4567 CHECK_NULL);
4568 names_h = objArrayHandle(THREAD, r);
4569 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4570 names_h->obj_at_put(0, name());
4571 break;
4572 }
4573 case JAVA_THREAD_STATE_RUNNABLE : {
4574 assert(values_h->length() == 1 &&
4575 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4576 "Invalid threadStatus value");
4578 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4579 1, /* only 1 substate */
4580 CHECK_NULL);
4581 names_h = objArrayHandle(THREAD, r);
4582 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4583 names_h->obj_at_put(0, name());
4584 break;
4585 }
4586 case JAVA_THREAD_STATE_BLOCKED : {
4587 assert(values_h->length() == 1 &&
4588 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4589 "Invalid threadStatus value");
4591 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4592 1, /* only 1 substate */
4593 CHECK_NULL);
4594 names_h = objArrayHandle(THREAD, r);
4595 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4596 names_h->obj_at_put(0, name());
4597 break;
4598 }
4599 case JAVA_THREAD_STATE_WAITING : {
4600 assert(values_h->length() == 2 &&
4601 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4602 values_h->int_at(1) == java_lang_Thread::PARKED,
4603 "Invalid threadStatus value");
4604 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4605 2, /* number of substates */
4606 CHECK_NULL);
4607 names_h = objArrayHandle(THREAD, r);
4608 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4609 CHECK_NULL);
4610 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4611 CHECK_NULL);
4612 names_h->obj_at_put(0, name0());
4613 names_h->obj_at_put(1, name1());
4614 break;
4615 }
4616 case JAVA_THREAD_STATE_TIMED_WAITING : {
4617 assert(values_h->length() == 3 &&
4618 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4619 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4620 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4621 "Invalid threadStatus value");
4622 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4623 3, /* number of substates */
4624 CHECK_NULL);
4625 names_h = objArrayHandle(THREAD, r);
4626 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4627 CHECK_NULL);
4628 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4629 CHECK_NULL);
4630 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4631 CHECK_NULL);
4632 names_h->obj_at_put(0, name0());
4633 names_h->obj_at_put(1, name1());
4634 names_h->obj_at_put(2, name2());
4635 break;
4636 }
4637 case JAVA_THREAD_STATE_TERMINATED : {
4638 assert(values_h->length() == 1 &&
4639 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4640 "Invalid threadStatus value");
4641 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4642 1, /* only 1 substate */
4643 CHECK_NULL);
4644 names_h = objArrayHandle(THREAD, r);
4645 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4646 names_h->obj_at_put(0, name());
4647 break;
4648 }
4649 default:
4650 // Unknown state - probably incompatible JDK version
4651 return NULL;
4652 }
4653 return (jobjectArray) JNIHandles::make_local(env, names_h());
4654 }
4655 JVM_END
4657 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4658 {
4659 memset(info, 0, sizeof(info_size));
4661 info->jvm_version = Abstract_VM_Version::jvm_version();
4662 info->update_version = 0; /* 0 in HotSpot Express VM */
4663 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4665 // when we add a new capability in the jvm_version_info struct, we should also
4666 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4667 // counter defined in runtimeService.cpp.
4668 info->is_attachable = AttachListener::is_attach_supported();
4669 }
4670 JVM_END