Mercurial > hg > truffle
annotate src/share/vm/prims/jvm.cpp @ 359:d515536da189
6740930: G1: compilation failure with latest gcc
Summary: Include DB fix to resolve a compilation issue with the latest gcc.
Reviewed-by: iveresov, ysr
author | tonyp |
---|---|
date | Tue, 26 Aug 2008 00:46:03 -0400 |
parents | 1ee8caae33af |
children | f008d3631bd1 |
rev | line source |
---|---|
0 | 1 /* |
196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_jvm.cpp.incl" | |
27 #include <errno.h> | |
28 | |
29 /* | |
30 NOTE about use of any ctor or function call that can trigger a safepoint/GC: | |
31 such ctors and calls MUST NOT come between an oop declaration/init and its | |
32 usage because if objects are move this may cause various memory stomps, bus | |
33 errors and segfaults. Here is a cookbook for causing so called "naked oop | |
34 failures": | |
35 | |
36 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { | |
37 JVMWrapper("JVM_GetClassDeclaredFields"); | |
38 | |
39 // Object address to be held directly in mirror & not visible to GC | |
40 oop mirror = JNIHandles::resolve_non_null(ofClass); | |
41 | |
42 // If this ctor can hit a safepoint, moving objects around, then | |
43 ComplexConstructor foo; | |
44 | |
45 // Boom! mirror may point to JUNK instead of the intended object | |
46 (some dereference of mirror) | |
47 | |
48 // Here's another call that may block for GC, making mirror stale | |
49 MutexLocker ml(some_lock); | |
50 | |
51 // And here's an initializer that can result in a stale oop | |
52 // all in one step. | |
53 oop o = call_that_can_throw_exception(TRAPS); | |
54 | |
55 | |
56 The solution is to keep the oop declaration BELOW the ctor or function | |
57 call that might cause a GC, do another resolve to reassign the oop, or | |
58 consider use of a Handle instead of an oop so there is immunity from object | |
59 motion. But note that the "QUICK" entries below do not have a handlemark | |
60 and thus can only support use of handles passed in. | |
61 */ | |
62 | |
63 static void trace_class_resolution_impl(klassOop to_class, TRAPS) { | |
64 ResourceMark rm; | |
65 int line_number = -1; | |
66 const char * source_file = NULL; | |
67 klassOop caller = NULL; | |
68 JavaThread* jthread = JavaThread::current(); | |
69 if (jthread->has_last_Java_frame()) { | |
70 vframeStream vfst(jthread); | |
71 | |
72 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames | |
73 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK); | |
74 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); | |
75 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK); | |
76 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); | |
77 | |
78 methodOop last_caller = NULL; | |
79 | |
80 while (!vfst.at_end()) { | |
81 methodOop m = vfst.method(); | |
82 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::classloader_klass())&& | |
83 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && | |
84 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { | |
85 break; | |
86 } | |
87 last_caller = m; | |
88 vfst.next(); | |
89 } | |
90 // if this is called from Class.forName0 and that is called from Class.forName, | |
91 // then print the caller of Class.forName. If this is Class.loadClass, then print | |
92 // that caller, otherwise keep quiet since this should be picked up elsewhere. | |
93 bool found_it = false; | |
94 if (!vfst.at_end() && | |
95 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
96 vfst.method()->name() == vmSymbols::forName0_name()) { | |
97 vfst.next(); | |
98 if (!vfst.at_end() && | |
99 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
100 vfst.method()->name() == vmSymbols::forName_name()) { | |
101 vfst.next(); | |
102 found_it = true; | |
103 } | |
104 } else if (last_caller != NULL && | |
105 instanceKlass::cast(last_caller->method_holder())->name() == | |
106 vmSymbols::java_lang_ClassLoader() && | |
107 (last_caller->name() == vmSymbols::loadClassInternal_name() || | |
108 last_caller->name() == vmSymbols::loadClass_name())) { | |
109 found_it = true; | |
110 } | |
111 if (found_it && !vfst.at_end()) { | |
112 // found the caller | |
113 caller = vfst.method()->method_holder(); | |
114 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
115 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); | |
116 if (s != NULL) { | |
117 source_file = s->as_C_string(); | |
118 } | |
119 } | |
120 } | |
121 if (caller != NULL) { | |
122 if (to_class != caller) { | |
123 const char * from = Klass::cast(caller)->external_name(); | |
124 const char * to = Klass::cast(to_class)->external_name(); | |
125 // print in a single call to reduce interleaving between threads | |
126 if (source_file != NULL) { | |
127 tty->print("RESOLVE %s %s %s:%d (explicit)\n", from, to, source_file, line_number); | |
128 } else { | |
129 tty->print("RESOLVE %s %s (explicit)\n", from, to); | |
130 } | |
131 } | |
132 } | |
133 } | |
134 | |
135 static void trace_class_resolution(klassOop to_class) { | |
136 EXCEPTION_MARK; | |
137 trace_class_resolution_impl(to_class, THREAD); | |
138 if (HAS_PENDING_EXCEPTION) { | |
139 CLEAR_PENDING_EXCEPTION; | |
140 } | |
141 } | |
142 | |
143 // Wrapper to trace JVM functions | |
144 | |
145 #ifdef ASSERT | |
146 class JVMTraceWrapper : public StackObj { | |
147 public: | |
148 JVMTraceWrapper(const char* format, ...) { | |
149 if (TraceJVMCalls) { | |
150 va_list ap; | |
151 va_start(ap, format); | |
152 tty->print("JVM "); | |
153 tty->vprint_cr(format, ap); | |
154 va_end(ap); | |
155 } | |
156 } | |
157 }; | |
158 | |
159 Histogram* JVMHistogram; | |
160 volatile jint JVMHistogram_lock = 0; | |
161 | |
162 class JVMHistogramElement : public HistogramElement { | |
163 public: | |
164 JVMHistogramElement(const char* name); | |
165 }; | |
166 | |
167 JVMHistogramElement::JVMHistogramElement(const char* elementName) { | |
168 _name = elementName; | |
169 uintx count = 0; | |
170 | |
171 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { | |
172 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { | |
173 count +=1; | |
174 if ( (WarnOnStalledSpinLock > 0) | |
175 && (count % WarnOnStalledSpinLock == 0)) { | |
176 warning("JVMHistogram_lock seems to be stalled"); | |
177 } | |
178 } | |
179 } | |
180 | |
181 if(JVMHistogram == NULL) | |
182 JVMHistogram = new Histogram("JVM Call Counts",100); | |
183 | |
184 JVMHistogram->add_element(this); | |
185 Atomic::dec(&JVMHistogram_lock); | |
186 } | |
187 | |
188 #define JVMCountWrapper(arg) \ | |
189 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ | |
190 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! | |
191 | |
192 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) | |
193 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) | |
194 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) | |
195 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) | |
196 #else | |
197 #define JVMWrapper(arg1) | |
198 #define JVMWrapper2(arg1, arg2) | |
199 #define JVMWrapper3(arg1, arg2, arg3) | |
200 #define JVMWrapper4(arg1, arg2, arg3, arg4) | |
201 #endif | |
202 | |
203 | |
204 // Interface version ///////////////////////////////////////////////////////////////////// | |
205 | |
206 | |
207 JVM_LEAF(jint, JVM_GetInterfaceVersion()) | |
208 return JVM_INTERFACE_VERSION; | |
209 JVM_END | |
210 | |
211 | |
212 // java.lang.System ////////////////////////////////////////////////////////////////////// | |
213 | |
214 | |
215 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) | |
216 JVMWrapper("JVM_CurrentTimeMillis"); | |
217 return os::javaTimeMillis(); | |
218 JVM_END | |
219 | |
220 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) | |
221 JVMWrapper("JVM_NanoTime"); | |
222 return os::javaTimeNanos(); | |
223 JVM_END | |
224 | |
225 | |
226 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, | |
227 jobject dst, jint dst_pos, jint length)) | |
228 JVMWrapper("JVM_ArrayCopy"); | |
229 // Check if we have null pointers | |
230 if (src == NULL || dst == NULL) { | |
231 THROW(vmSymbols::java_lang_NullPointerException()); | |
232 } | |
233 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); | |
234 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); | |
235 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); | |
236 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); | |
237 // Do copy | |
238 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); | |
239 JVM_END | |
240 | |
241 | |
242 static void set_property(Handle props, const char* key, const char* value, TRAPS) { | |
243 JavaValue r(T_OBJECT); | |
244 // public synchronized Object put(Object key, Object value); | |
245 HandleMark hm(THREAD); | |
246 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); | |
247 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); | |
248 JavaCalls::call_virtual(&r, | |
249 props, | |
250 KlassHandle(THREAD, SystemDictionary::properties_klass()), | |
251 vmSymbolHandles::put_name(), | |
252 vmSymbolHandles::object_object_object_signature(), | |
253 key_str, | |
254 value_str, | |
255 THREAD); | |
256 } | |
257 | |
258 | |
259 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); | |
260 | |
261 | |
262 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) | |
263 JVMWrapper("JVM_InitProperties"); | |
264 ResourceMark rm; | |
265 | |
266 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
267 | |
268 // System property list includes both user set via -D option and | |
269 // jvm system specific properties. | |
270 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { | |
271 PUTPROP(props, p->key(), p->value()); | |
272 } | |
273 | |
274 // Convert the -XX:MaxDirectMemorySize= command line flag | |
275 // to the sun.nio.MaxDirectMemorySize property. | |
276 // Do this after setting user properties to prevent people | |
277 // from setting the value with a -D option, as requested. | |
278 { | |
279 char as_chars[256]; | |
280 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize); | |
281 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); | |
282 } | |
283 | |
284 // JVM monitoring and management support | |
285 // Add the sun.management.compiler property for the compiler's name | |
286 { | |
287 #undef CSIZE | |
288 #if defined(_LP64) || defined(_WIN64) | |
289 #define CSIZE "64-Bit " | |
290 #else | |
291 #define CSIZE | |
292 #endif // 64bit | |
293 | |
294 #ifdef TIERED | |
295 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; | |
296 #else | |
297 #if defined(COMPILER1) | |
298 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; | |
299 #elif defined(COMPILER2) | |
300 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; | |
301 #else | |
302 const char* compiler_name = ""; | |
303 #endif // compilers | |
304 #endif // TIERED | |
305 | |
306 if (*compiler_name != '\0' && | |
307 (Arguments::mode() != Arguments::_int)) { | |
308 PUTPROP(props, "sun.management.compiler", compiler_name); | |
309 } | |
310 } | |
311 | |
312 return properties; | |
313 JVM_END | |
314 | |
315 | |
316 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// | |
317 | |
318 extern volatile jint vm_created; | |
319 | |
320 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) | |
321 if (vm_created != 0 && (code == 0)) { | |
322 // The VM is about to exit. We call back into Java to check whether finalizers should be run | |
323 Universe::run_finalizers_on_exit(); | |
324 } | |
325 before_exit(thread); | |
326 vm_exit(code); | |
327 JVM_END | |
328 | |
329 | |
330 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) | |
331 before_exit(thread); | |
332 vm_exit(code); | |
333 JVM_END | |
334 | |
335 | |
336 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) | |
337 register_on_exit_function(func); | |
338 JVM_END | |
339 | |
340 | |
341 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) | |
342 JVMWrapper("JVM_GC"); | |
343 if (!DisableExplicitGC) { | |
344 Universe::heap()->collect(GCCause::_java_lang_system_gc); | |
345 } | |
346 JVM_END | |
347 | |
348 | |
349 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) | |
350 JVMWrapper("JVM_MaxObjectInspectionAge"); | |
351 return Universe::heap()->millis_since_last_gc(); | |
352 JVM_END | |
353 | |
354 | |
355 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) | |
356 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); | |
357 JVM_END | |
358 | |
359 | |
360 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) | |
361 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); | |
362 JVM_END | |
363 | |
364 static inline jlong convert_size_t_to_jlong(size_t val) { | |
365 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). | |
366 NOT_LP64 (return (jlong)val;) | |
367 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) | |
368 } | |
369 | |
370 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) | |
371 JVMWrapper("JVM_TotalMemory"); | |
372 size_t n = Universe::heap()->capacity(); | |
373 return convert_size_t_to_jlong(n); | |
374 JVM_END | |
375 | |
376 | |
377 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) | |
378 JVMWrapper("JVM_FreeMemory"); | |
379 CollectedHeap* ch = Universe::heap(); | |
342
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380 size_t n; |
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381 { |
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382 MutexLocker x(Heap_lock); |
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383 n = ch->capacity() - ch->used(); |
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384 } |
0 | 385 return convert_size_t_to_jlong(n); |
386 JVM_END | |
387 | |
388 | |
389 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) | |
390 JVMWrapper("JVM_MaxMemory"); | |
391 size_t n = Universe::heap()->max_capacity(); | |
392 return convert_size_t_to_jlong(n); | |
393 JVM_END | |
394 | |
395 | |
396 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) | |
397 JVMWrapper("JVM_ActiveProcessorCount"); | |
398 return os::active_processor_count(); | |
399 JVM_END | |
400 | |
401 | |
402 | |
403 // java.lang.Throwable ////////////////////////////////////////////////////// | |
404 | |
405 | |
406 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) | |
407 JVMWrapper("JVM_FillInStackTrace"); | |
408 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); | |
409 java_lang_Throwable::fill_in_stack_trace(exception); | |
410 JVM_END | |
411 | |
412 | |
413 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) | |
414 JVMWrapper("JVM_PrintStackTrace"); | |
415 // Note: This is no longer used in Merlin, but we still support it for compatibility. | |
416 oop exception = JNIHandles::resolve_non_null(receiver); | |
417 oop stream = JNIHandles::resolve_non_null(printable); | |
418 java_lang_Throwable::print_stack_trace(exception, stream); | |
419 JVM_END | |
420 | |
421 | |
422 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) | |
423 JVMWrapper("JVM_GetStackTraceDepth"); | |
424 oop exception = JNIHandles::resolve(throwable); | |
425 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); | |
426 JVM_END | |
427 | |
428 | |
429 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) | |
430 JVMWrapper("JVM_GetStackTraceElement"); | |
431 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC | |
432 oop exception = JNIHandles::resolve(throwable); | |
433 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); | |
434 return JNIHandles::make_local(env, element); | |
435 JVM_END | |
436 | |
437 | |
438 // java.lang.Object /////////////////////////////////////////////// | |
439 | |
440 | |
441 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) | |
442 JVMWrapper("JVM_IHashCode"); | |
443 // as implemented in the classic virtual machine; return 0 if object is NULL | |
444 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; | |
445 JVM_END | |
446 | |
447 | |
448 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) | |
449 JVMWrapper("JVM_MonitorWait"); | |
450 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
451 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); | |
452 JavaThreadInObjectWaitState jtiows(thread, ms != 0); | |
453 if (JvmtiExport::should_post_monitor_wait()) { | |
454 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); | |
455 } | |
456 ObjectSynchronizer::wait(obj, ms, CHECK); | |
457 JVM_END | |
458 | |
459 | |
460 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) | |
461 JVMWrapper("JVM_MonitorNotify"); | |
462 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
463 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); | |
464 ObjectSynchronizer::notify(obj, CHECK); | |
465 JVM_END | |
466 | |
467 | |
468 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) | |
469 JVMWrapper("JVM_MonitorNotifyAll"); | |
470 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
471 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); | |
472 ObjectSynchronizer::notifyall(obj, CHECK); | |
473 JVM_END | |
474 | |
475 | |
476 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) | |
477 JVMWrapper("JVM_Clone"); | |
478 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
479 const KlassHandle klass (THREAD, obj->klass()); | |
480 JvmtiVMObjectAllocEventCollector oam; | |
481 | |
482 #ifdef ASSERT | |
483 // Just checking that the cloneable flag is set correct | |
484 if (obj->is_javaArray()) { | |
485 guarantee(klass->is_cloneable(), "all arrays are cloneable"); | |
486 } else { | |
487 guarantee(obj->is_instance(), "should be instanceOop"); | |
488 bool cloneable = klass->is_subtype_of(SystemDictionary::cloneable_klass()); | |
489 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); | |
490 } | |
491 #endif | |
492 | |
493 // Check if class of obj supports the Cloneable interface. | |
494 // All arrays are considered to be cloneable (See JLS 20.1.5) | |
495 if (!klass->is_cloneable()) { | |
496 ResourceMark rm(THREAD); | |
497 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); | |
498 } | |
499 | |
500 // Make shallow object copy | |
501 const int size = obj->size(); | |
502 oop new_obj = NULL; | |
503 if (obj->is_javaArray()) { | |
504 const int length = ((arrayOop)obj())->length(); | |
505 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); | |
506 } else { | |
507 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); | |
508 } | |
509 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread | |
510 // is modifying a reference field in the clonee, a non-oop-atomic copy might | |
511 // be suspended in the middle of copying the pointer and end up with parts | |
512 // of two different pointers in the field. Subsequent dereferences will crash. | |
513 // 4846409: an oop-copy of objects with long or double fields or arrays of same | |
514 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead | |
515 // of oops. We know objects are aligned on a minimum of an jlong boundary. | |
516 // The same is true of StubRoutines::object_copy and the various oop_copy | |
517 // variants, and of the code generated by the inline_native_clone intrinsic. | |
518 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); | |
519 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, | |
520 (size_t)align_object_size(size) / HeapWordsPerLong); | |
521 // Clear the header | |
522 new_obj->init_mark(); | |
523 | |
524 // Store check (mark entire object and let gc sort it out) | |
525 BarrierSet* bs = Universe::heap()->barrier_set(); | |
526 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); | |
527 bs->write_region(MemRegion((HeapWord*)new_obj, size)); | |
528 | |
529 // Caution: this involves a java upcall, so the clone should be | |
530 // "gc-robust" by this stage. | |
531 if (klass->has_finalizer()) { | |
532 assert(obj->is_instance(), "should be instanceOop"); | |
533 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); | |
534 } | |
535 | |
536 return JNIHandles::make_local(env, oop(new_obj)); | |
537 JVM_END | |
538 | |
539 // java.lang.Compiler //////////////////////////////////////////////////// | |
540 | |
541 // The initial cuts of the HotSpot VM will not support JITs, and all existing | |
542 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM | |
543 // functions are all silently ignored unless JVM warnings are printed. | |
544 | |
545 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) | |
546 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); | |
547 JVM_END | |
548 | |
549 | |
550 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) | |
551 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); | |
552 return JNI_FALSE; | |
553 JVM_END | |
554 | |
555 | |
556 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) | |
557 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); | |
558 return JNI_FALSE; | |
559 JVM_END | |
560 | |
561 | |
562 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) | |
563 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); | |
564 return JNI_FALSE; | |
565 JVM_END | |
566 | |
567 | |
568 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) | |
569 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); | |
570 return NULL; | |
571 JVM_END | |
572 | |
573 | |
574 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) | |
575 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); | |
576 JVM_END | |
577 | |
578 | |
579 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) | |
580 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); | |
581 JVM_END | |
582 | |
583 | |
584 | |
585 // Error message support ////////////////////////////////////////////////////// | |
586 | |
587 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) | |
588 JVMWrapper("JVM_GetLastErrorString"); | |
589 return hpi::lasterror(buf, len); | |
590 JVM_END | |
591 | |
592 | |
593 // java.io.File /////////////////////////////////////////////////////////////// | |
594 | |
595 JVM_LEAF(char*, JVM_NativePath(char* path)) | |
596 JVMWrapper2("JVM_NativePath (%s)", path); | |
597 return hpi::native_path(path); | |
598 JVM_END | |
599 | |
600 | |
601 // Misc. class handling /////////////////////////////////////////////////////////// | |
602 | |
603 | |
604 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) | |
605 JVMWrapper("JVM_GetCallerClass"); | |
606 klassOop k = thread->security_get_caller_class(depth); | |
607 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
608 JVM_END | |
609 | |
610 | |
611 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) | |
612 JVMWrapper("JVM_FindPrimitiveClass"); | |
613 oop mirror = NULL; | |
614 BasicType t = name2type(utf); | |
615 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { | |
616 mirror = Universe::java_mirror(t); | |
617 } | |
618 if (mirror == NULL) { | |
619 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); | |
620 } else { | |
621 return (jclass) JNIHandles::make_local(env, mirror); | |
622 } | |
623 JVM_END | |
624 | |
625 | |
626 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) | |
627 JVMWrapper("JVM_ResolveClass"); | |
628 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); | |
629 JVM_END | |
630 | |
226
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631 // Rationale behind JVM_FindClassFromBootLoader |
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632 // a> JVM_FindClassFromClassLoader was never exported in the export tables. |
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633 // b> because of (a) java.dll has a direct dependecy on the unexported |
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634 // private symbol "_JVM_FindClassFromClassLoader@20". |
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635 // c> the launcher cannot use the private symbol as it dynamically opens |
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636 // the entry point, so if something changes, the launcher will fail |
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637 // unexpectedly at runtime, it is safest for the launcher to dlopen a |
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638 // stable exported interface. |
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639 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its |
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640 // signature to change from _JVM_FindClassFromClassLoader@20 to |
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641 // JVM_FindClassFromClassLoader and will not be backward compatible |
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642 // with older JDKs. |
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643 // Thus a public/stable exported entry point is the right solution, |
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644 // public here means public in linker semantics, and is exported only |
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645 // to the JDK, and is not intended to be a public API. |
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646 |
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647 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, |
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648 const char* name, |
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649 jboolean throwError)) |
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650 JVMWrapper3("JVM_FindClassFromBootLoader %s throw %s", name, |
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651 throwError ? "error" : "exception"); |
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652 return JVM_FindClassFromClassLoader(env, name, JNI_FALSE, |
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653 (jobject)NULL, throwError); |
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654 JVM_END |
0 | 655 |
656 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, | |
657 jboolean init, jobject loader, | |
658 jboolean throwError)) | |
659 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, | |
660 throwError ? "error" : "exception"); | |
661 // Java libraries should ensure that name is never null... | |
662 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { | |
663 // It's impossible to create this class; the name cannot fit | |
664 // into the constant pool. | |
665 if (throwError) { | |
666 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
667 } else { | |
668 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); | |
669 } | |
670 } | |
671 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
672 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
673 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
674 Handle(), throwError, thread); | |
675 | |
676 if (TraceClassResolution && result != NULL) { | |
677 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); | |
678 } | |
679 | |
680 return result; | |
681 JVM_END | |
682 | |
683 | |
684 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, | |
685 jboolean init, jclass from)) | |
686 JVMWrapper2("JVM_FindClassFromClass %s", name); | |
687 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { | |
688 // It's impossible to create this class; the name cannot fit | |
689 // into the constant pool. | |
690 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
691 } | |
692 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
693 oop from_class_oop = JNIHandles::resolve(from); | |
694 klassOop from_class = (from_class_oop == NULL) | |
695 ? (klassOop)NULL | |
696 : java_lang_Class::as_klassOop(from_class_oop); | |
697 oop class_loader = NULL; | |
698 oop protection_domain = NULL; | |
699 if (from_class != NULL) { | |
700 class_loader = Klass::cast(from_class)->class_loader(); | |
701 protection_domain = Klass::cast(from_class)->protection_domain(); | |
702 } | |
703 Handle h_loader(THREAD, class_loader); | |
704 Handle h_prot (THREAD, protection_domain); | |
705 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
706 h_prot, true, thread); | |
707 | |
708 if (TraceClassResolution && result != NULL) { | |
709 // this function is generally only used for class loading during verification. | |
710 ResourceMark rm; | |
711 oop from_mirror = JNIHandles::resolve_non_null(from); | |
712 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); | |
713 const char * from_name = Klass::cast(from_class)->external_name(); | |
714 | |
715 oop mirror = JNIHandles::resolve_non_null(result); | |
716 klassOop to_class = java_lang_Class::as_klassOop(mirror); | |
717 const char * to = Klass::cast(to_class)->external_name(); | |
718 tty->print("RESOLVE %s %s (verification)\n", from_name, to); | |
719 } | |
720 | |
721 return result; | |
722 JVM_END | |
723 | |
724 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { | |
725 if (loader.is_null()) { | |
726 return; | |
727 } | |
728 | |
729 // check whether the current caller thread holds the lock or not. | |
730 // If not, increment the corresponding counter | |
731 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != | |
732 ObjectSynchronizer::owner_self) { | |
733 counter->inc(); | |
734 } | |
735 } | |
736 | |
737 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() | |
738 static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) { | |
739 | |
740 // Since exceptions can be thrown, class initialization can take place | |
741 // if name is NULL no check for class name in .class stream has to be made. | |
742 symbolHandle class_name; | |
743 if (name != NULL) { | |
744 const int str_len = (int)strlen(name); | |
745 if (str_len > symbolOopDesc::max_length()) { | |
746 // It's impossible to create this class; the name cannot fit | |
747 // into the constant pool. | |
748 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
749 } | |
750 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL); | |
751 } | |
752 | |
753 ResourceMark rm(THREAD); | |
754 ClassFileStream st((u1*) buf, len, (char *)source); | |
755 Handle class_loader (THREAD, JNIHandles::resolve(loader)); | |
756 if (UsePerfData) { | |
757 is_lock_held_by_thread(class_loader, | |
758 ClassLoader::sync_JVMDefineClassLockFreeCounter(), | |
759 THREAD); | |
760 } | |
761 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); | |
762 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, | |
763 protection_domain, &st, | |
764 CHECK_NULL); | |
765 | |
766 if (TraceClassResolution && k != NULL) { | |
767 trace_class_resolution(k); | |
768 } | |
769 | |
770 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
771 } | |
772 | |
773 | |
774 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) | |
775 JVMWrapper2("JVM_DefineClass %s", name); | |
776 | |
777 return jvm_define_class_common(env, name, loader, buf, len, pd, "__JVM_DefineClass__", THREAD); | |
778 JVM_END | |
779 | |
780 | |
781 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) | |
782 JVMWrapper2("JVM_DefineClassWithSource %s", name); | |
783 | |
784 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD); | |
785 JVM_END | |
786 | |
787 | |
788 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) | |
789 JVMWrapper("JVM_FindLoadedClass"); | |
790 ResourceMark rm(THREAD); | |
791 | |
792 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
793 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); | |
794 | |
795 const char* str = java_lang_String::as_utf8_string(string()); | |
796 // Sanity check, don't expect null | |
797 if (str == NULL) return NULL; | |
798 | |
799 const int str_len = (int)strlen(str); | |
800 if (str_len > symbolOopDesc::max_length()) { | |
801 // It's impossible to create this class; the name cannot fit | |
802 // into the constant pool. | |
803 return NULL; | |
804 } | |
805 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL); | |
806 | |
807 // Security Note: | |
808 // The Java level wrapper will perform the necessary security check allowing | |
809 // us to pass the NULL as the initiating class loader. | |
810 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
811 if (UsePerfData) { | |
812 is_lock_held_by_thread(h_loader, | |
813 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), | |
814 THREAD); | |
815 } | |
816 | |
817 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, | |
818 h_loader, | |
819 Handle(), | |
820 CHECK_NULL); | |
821 | |
822 return (k == NULL) ? NULL : | |
823 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
824 JVM_END | |
825 | |
826 | |
827 // Reflection support ////////////////////////////////////////////////////////////////////////////// | |
828 | |
829 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) | |
830 assert (cls != NULL, "illegal class"); | |
831 JVMWrapper("JVM_GetClassName"); | |
832 JvmtiVMObjectAllocEventCollector oam; | |
833 ResourceMark rm(THREAD); | |
834 const char* name; | |
835 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
836 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); | |
837 } else { | |
838 // Consider caching interned string in Klass | |
839 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
840 assert(k->is_klass(), "just checking"); | |
841 name = Klass::cast(k)->external_name(); | |
842 } | |
843 oop result = StringTable::intern((char*) name, CHECK_NULL); | |
844 return (jstring) JNIHandles::make_local(env, result); | |
845 JVM_END | |
846 | |
847 | |
848 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) | |
849 JVMWrapper("JVM_GetClassInterfaces"); | |
850 JvmtiVMObjectAllocEventCollector oam; | |
851 oop mirror = JNIHandles::resolve_non_null(cls); | |
852 | |
853 // Special handling for primitive objects | |
854 if (java_lang_Class::is_primitive(mirror)) { | |
855 // Primitive objects does not have any interfaces | |
856 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); | |
857 return (jobjectArray) JNIHandles::make_local(env, r); | |
858 } | |
859 | |
860 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); | |
861 // Figure size of result array | |
862 int size; | |
863 if (klass->oop_is_instance()) { | |
864 size = instanceKlass::cast(klass())->local_interfaces()->length(); | |
865 } else { | |
866 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); | |
867 size = 2; | |
868 } | |
869 | |
870 // Allocate result array | |
871 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL); | |
872 objArrayHandle result (THREAD, r); | |
873 // Fill in result | |
874 if (klass->oop_is_instance()) { | |
875 // Regular instance klass, fill in all local interfaces | |
876 for (int index = 0; index < size; index++) { | |
877 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); | |
878 result->obj_at_put(index, Klass::cast(k)->java_mirror()); | |
879 } | |
880 } else { | |
881 // All arrays implement java.lang.Cloneable and java.io.Serializable | |
882 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror()); | |
883 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror()); | |
884 } | |
885 return (jobjectArray) JNIHandles::make_local(env, result()); | |
886 JVM_END | |
887 | |
888 | |
889 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) | |
890 JVMWrapper("JVM_GetClassLoader"); | |
891 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
892 return NULL; | |
893 } | |
894 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
895 oop loader = Klass::cast(k)->class_loader(); | |
896 return JNIHandles::make_local(env, loader); | |
897 JVM_END | |
898 | |
899 | |
900 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) | |
901 JVMWrapper("JVM_IsInterface"); | |
902 oop mirror = JNIHandles::resolve_non_null(cls); | |
903 if (java_lang_Class::is_primitive(mirror)) { | |
904 return JNI_FALSE; | |
905 } | |
906 klassOop k = java_lang_Class::as_klassOop(mirror); | |
907 jboolean result = Klass::cast(k)->is_interface(); | |
908 assert(!result || Klass::cast(k)->oop_is_instance(), | |
909 "all interfaces are instance types"); | |
910 // The compiler intrinsic for isInterface tests the | |
911 // Klass::_access_flags bits in the same way. | |
912 return result; | |
913 JVM_END | |
914 | |
915 | |
916 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) | |
917 JVMWrapper("JVM_GetClassSigners"); | |
918 JvmtiVMObjectAllocEventCollector oam; | |
919 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
920 // There are no signers for primitive types | |
921 return NULL; | |
922 } | |
923 | |
924 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
925 objArrayOop signers = NULL; | |
926 if (Klass::cast(k)->oop_is_instance()) { | |
927 signers = instanceKlass::cast(k)->signers(); | |
928 } | |
929 | |
930 // If there are no signers set in the class, or if the class | |
931 // is an array, return NULL. | |
932 if (signers == NULL) return NULL; | |
933 | |
934 // copy of the signers array | |
935 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); | |
936 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); | |
937 for (int index = 0; index < signers->length(); index++) { | |
938 signers_copy->obj_at_put(index, signers->obj_at(index)); | |
939 } | |
940 | |
941 // return the copy | |
942 return (jobjectArray) JNIHandles::make_local(env, signers_copy); | |
943 JVM_END | |
944 | |
945 | |
946 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) | |
947 JVMWrapper("JVM_SetClassSigners"); | |
948 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
949 // This call is ignored for primitive types and arrays. | |
950 // Signers are only set once, ClassLoader.java, and thus shouldn't | |
951 // be called with an array. Only the bootstrap loader creates arrays. | |
952 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
953 if (Klass::cast(k)->oop_is_instance()) { | |
954 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); | |
955 } | |
956 } | |
957 JVM_END | |
958 | |
959 | |
960 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) | |
961 JVMWrapper("JVM_GetProtectionDomain"); | |
962 if (JNIHandles::resolve(cls) == NULL) { | |
963 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
964 } | |
965 | |
966 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
967 // Primitive types does not have a protection domain. | |
968 return NULL; | |
969 } | |
970 | |
971 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
972 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); | |
973 JVM_END | |
974 | |
975 | |
976 // Obsolete since 1.2 (Class.setProtectionDomain removed), although | |
977 // still defined in core libraries as of 1.5. | |
978 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) | |
979 JVMWrapper("JVM_SetProtectionDomain"); | |
980 if (JNIHandles::resolve(cls) == NULL) { | |
981 THROW(vmSymbols::java_lang_NullPointerException()); | |
982 } | |
983 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
984 // Call is ignored for primitive types | |
985 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
986 | |
987 // cls won't be an array, as this called only from ClassLoader.defineClass | |
988 if (Klass::cast(k)->oop_is_instance()) { | |
989 oop pd = JNIHandles::resolve(protection_domain); | |
990 assert(pd == NULL || pd->is_oop(), "just checking"); | |
991 instanceKlass::cast(k)->set_protection_domain(pd); | |
992 } | |
993 } | |
994 JVM_END | |
995 | |
996 | |
997 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) | |
998 JVMWrapper("JVM_DoPrivileged"); | |
999 | |
1000 if (action == NULL) { | |
1001 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); | |
1002 } | |
1003 | |
1004 // Stack allocated list of privileged stack elements | |
1005 PrivilegedElement pi; | |
1006 | |
1007 // Check that action object understands "Object run()" | |
1008 Handle object (THREAD, JNIHandles::resolve(action)); | |
1009 | |
1010 // get run() method | |
1011 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( | |
1012 vmSymbols::run_method_name(), | |
1013 vmSymbols::void_object_signature()); | |
1014 methodHandle m (THREAD, m_oop); | |
1015 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { | |
1016 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); | |
1017 } | |
1018 | |
1019 // Compute the frame initiating the do privileged operation and setup the privileged stack | |
1020 vframeStream vfst(thread); | |
1021 vfst.security_get_caller_frame(1); | |
1022 | |
1023 if (!vfst.at_end()) { | |
1024 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); | |
1025 thread->set_privileged_stack_top(&pi); | |
1026 } | |
1027 | |
1028 | |
1029 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type | |
1030 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction | |
1031 Handle pending_exception; | |
1032 JavaValue result(T_OBJECT); | |
1033 JavaCallArguments args(object); | |
1034 JavaCalls::call(&result, m, &args, THREAD); | |
1035 | |
1036 // done with action, remove ourselves from the list | |
1037 if (!vfst.at_end()) { | |
1038 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); | |
1039 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); | |
1040 } | |
1041 | |
1042 if (HAS_PENDING_EXCEPTION) { | |
1043 pending_exception = Handle(THREAD, PENDING_EXCEPTION); | |
1044 CLEAR_PENDING_EXCEPTION; | |
1045 | |
1046 if ( pending_exception->is_a(SystemDictionary::exception_klass()) && | |
1047 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) { | |
1048 // Throw a java.security.PrivilegedActionException(Exception e) exception | |
1049 JavaCallArguments args(pending_exception); | |
1050 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(), | |
1051 vmSymbolHandles::exception_void_signature(), | |
1052 &args); | |
1053 } | |
1054 } | |
1055 | |
1056 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); | |
1057 return JNIHandles::make_local(env, (oop) result.get_jobject()); | |
1058 JVM_END | |
1059 | |
1060 | |
1061 // Returns the inherited_access_control_context field of the running thread. | |
1062 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) | |
1063 JVMWrapper("JVM_GetInheritedAccessControlContext"); | |
1064 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); | |
1065 return JNIHandles::make_local(env, result); | |
1066 JVM_END | |
1067 | |
1068 class RegisterArrayForGC { | |
1069 private: | |
1070 JavaThread *_thread; | |
1071 public: | |
1072 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { | |
1073 _thread = thread; | |
1074 _thread->register_array_for_gc(array); | |
1075 } | |
1076 | |
1077 ~RegisterArrayForGC() { | |
1078 _thread->register_array_for_gc(NULL); | |
1079 } | |
1080 }; | |
1081 | |
1082 | |
1083 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) | |
1084 JVMWrapper("JVM_GetStackAccessControlContext"); | |
1085 if (!UsePrivilegedStack) return NULL; | |
1086 | |
1087 ResourceMark rm(THREAD); | |
1088 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); | |
1089 JvmtiVMObjectAllocEventCollector oam; | |
1090 | |
1091 // count the protection domains on the execution stack. We collapse | |
1092 // duplicate consecutive protection domains into a single one, as | |
1093 // well as stopping when we hit a privileged frame. | |
1094 | |
1095 // Use vframeStream to iterate through Java frames | |
1096 vframeStream vfst(thread); | |
1097 | |
1098 oop previous_protection_domain = NULL; | |
1099 Handle privileged_context(thread, NULL); | |
1100 bool is_privileged = false; | |
1101 oop protection_domain = NULL; | |
1102 | |
1103 for(; !vfst.at_end(); vfst.next()) { | |
1104 // get method of frame | |
1105 methodOop method = vfst.method(); | |
1106 intptr_t* frame_id = vfst.frame_id(); | |
1107 | |
1108 // check the privileged frames to see if we have a match | |
1109 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { | |
1110 // this frame is privileged | |
1111 is_privileged = true; | |
1112 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); | |
1113 protection_domain = thread->privileged_stack_top()->protection_domain(); | |
1114 } else { | |
1115 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); | |
1116 } | |
1117 | |
1118 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { | |
1119 local_array->push(protection_domain); | |
1120 previous_protection_domain = protection_domain; | |
1121 } | |
1122 | |
1123 if (is_privileged) break; | |
1124 } | |
1125 | |
1126 | |
1127 // either all the domains on the stack were system domains, or | |
1128 // we had a privileged system domain | |
1129 if (local_array->is_empty()) { | |
1130 if (is_privileged && privileged_context.is_null()) return NULL; | |
1131 | |
1132 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); | |
1133 return JNIHandles::make_local(env, result); | |
1134 } | |
1135 | |
1136 // the resource area must be registered in case of a gc | |
1137 RegisterArrayForGC ragc(thread, local_array); | |
1138 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(), | |
1139 local_array->length(), CHECK_NULL); | |
1140 objArrayHandle h_context(thread, context); | |
1141 for (int index = 0; index < local_array->length(); index++) { | |
1142 h_context->obj_at_put(index, local_array->at(index)); | |
1143 } | |
1144 | |
1145 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); | |
1146 | |
1147 return JNIHandles::make_local(env, result); | |
1148 JVM_END | |
1149 | |
1150 | |
1151 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) | |
1152 JVMWrapper("JVM_IsArrayClass"); | |
1153 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1154 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; | |
1155 JVM_END | |
1156 | |
1157 | |
1158 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) | |
1159 JVMWrapper("JVM_IsPrimitiveClass"); | |
1160 oop mirror = JNIHandles::resolve_non_null(cls); | |
1161 return (jboolean) java_lang_Class::is_primitive(mirror); | |
1162 JVM_END | |
1163 | |
1164 | |
1165 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) | |
1166 JVMWrapper("JVM_GetComponentType"); | |
1167 oop mirror = JNIHandles::resolve_non_null(cls); | |
1168 oop result = Reflection::array_component_type(mirror, CHECK_NULL); | |
1169 return (jclass) JNIHandles::make_local(env, result); | |
1170 JVM_END | |
1171 | |
1172 | |
1173 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) | |
1174 JVMWrapper("JVM_GetClassModifiers"); | |
1175 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1176 // Primitive type | |
1177 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1178 } | |
1179 | |
1180 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1181 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); | |
1182 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); | |
1183 return k->modifier_flags(); | |
1184 JVM_END | |
1185 | |
1186 | |
1187 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// | |
1188 | |
1189 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) | |
1190 const int inner_class_info_index = 0; | |
1191 const int outer_class_info_index = 1; | |
1192 | |
1193 JvmtiVMObjectAllocEventCollector oam; | |
1194 // ofClass is a reference to a java_lang_Class object. The mirror object | |
1195 // of an instanceKlass | |
1196 | |
1197 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1198 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1199 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); | |
1200 return (jobjectArray)JNIHandles::make_local(env, result); | |
1201 } | |
1202 | |
1203 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1204 | |
1205 if (k->inner_classes()->length() == 0) { | |
1206 // Neither an inner nor outer class | |
1207 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); | |
1208 return (jobjectArray)JNIHandles::make_local(env, result); | |
1209 } | |
1210 | |
1211 // find inner class info | |
1212 typeArrayHandle icls(thread, k->inner_classes()); | |
1213 constantPoolHandle cp(thread, k->constants()); | |
1214 int length = icls->length(); | |
1215 | |
1216 // Allocate temp. result array | |
1217 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL); | |
1218 objArrayHandle result (THREAD, r); | |
1219 int members = 0; | |
1220 | |
1221 for(int i = 0; i < length; i += 4) { | |
1222 int ioff = icls->ushort_at(i + inner_class_info_index); | |
1223 int ooff = icls->ushort_at(i + outer_class_info_index); | |
1224 | |
1225 if (ioff != 0 && ooff != 0) { | |
1226 // Check to see if the name matches the class we're looking for | |
1227 // before attempting to find the class. | |
1228 if (cp->klass_name_at_matches(k, ooff)) { | |
1229 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); | |
1230 if (outer_klass == k()) { | |
1231 klassOop ik = cp->klass_at(ioff, CHECK_NULL); | |
1232 instanceKlassHandle inner_klass (THREAD, ik); | |
1233 | |
1234 // Throws an exception if outer klass has not declared k as | |
1235 // an inner klass | |
1236 Reflection::check_for_inner_class(k, inner_klass, CHECK_NULL); | |
1237 | |
1238 result->obj_at_put(members, inner_klass->java_mirror()); | |
1239 members++; | |
1240 } | |
1241 } | |
1242 } | |
1243 } | |
1244 | |
1245 if (members != length) { | |
1246 // Return array of right length | |
1247 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL); | |
1248 for(int i = 0; i < members; i++) { | |
1249 res->obj_at_put(i, result->obj_at(i)); | |
1250 } | |
1251 return (jobjectArray)JNIHandles::make_local(env, res); | |
1252 } | |
1253 | |
1254 return (jobjectArray)JNIHandles::make_local(env, result()); | |
1255 JVM_END | |
1256 | |
1257 | |
1258 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) | |
1259 const int inner_class_info_index = 0; | |
1260 const int outer_class_info_index = 1; | |
1261 | |
1262 // ofClass is a reference to a java_lang_Class object. | |
1263 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1264 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1265 return NULL; | |
1266 } | |
1267 | |
1268 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1269 | |
1270 if (k->inner_classes()->length() == 0) { | |
1271 // No inner class info => no declaring class | |
1272 return NULL; | |
1273 } | |
1274 | |
1275 typeArrayHandle i_icls(thread, k->inner_classes()); | |
1276 constantPoolHandle i_cp(thread, k->constants()); | |
1277 int i_length = i_icls->length(); | |
1278 | |
1279 bool found = false; | |
1280 klassOop ok; | |
1281 instanceKlassHandle outer_klass; | |
1282 | |
1283 // Find inner_klass attribute | |
1284 for(int i = 0; i < i_length && !found; i+= 4) { | |
1285 int ioff = i_icls->ushort_at(i + inner_class_info_index); | |
1286 int ooff = i_icls->ushort_at(i + outer_class_info_index); | |
1287 | |
1288 if (ioff != 0 && ooff != 0) { | |
1289 // Check to see if the name matches the class we're looking for | |
1290 // before attempting to find the class. | |
1291 if (i_cp->klass_name_at_matches(k, ioff)) { | |
1292 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); | |
1293 if (k() == inner_klass) { | |
1294 found = true; | |
1295 ok = i_cp->klass_at(ooff, CHECK_NULL); | |
1296 outer_klass = instanceKlassHandle(thread, ok); | |
1297 } | |
1298 } | |
1299 } | |
1300 } | |
1301 | |
1302 // If no inner class attribute found for this class. | |
1303 if (!found) return NULL; | |
1304 | |
1305 // Throws an exception if outer klass has not declared k as an inner klass | |
1306 Reflection::check_for_inner_class(outer_klass, k, CHECK_NULL); | |
1307 | |
1308 return (jclass)JNIHandles::make_local(env, outer_klass->java_mirror()); | |
1309 JVM_END | |
1310 | |
1311 | |
1312 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) | |
1313 assert (cls != NULL, "illegal class"); | |
1314 JVMWrapper("JVM_GetClassSignature"); | |
1315 JvmtiVMObjectAllocEventCollector oam; | |
1316 ResourceMark rm(THREAD); | |
1317 // Return null for arrays and primatives | |
1318 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1319 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1320 if (Klass::cast(k)->oop_is_instance()) { | |
1321 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature()); | |
1322 if (sym.is_null()) return NULL; | |
1323 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
1324 return (jstring) JNIHandles::make_local(env, str()); | |
1325 } | |
1326 } | |
1327 return NULL; | |
1328 JVM_END | |
1329 | |
1330 | |
1331 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) | |
1332 assert (cls != NULL, "illegal class"); | |
1333 JVMWrapper("JVM_GetClassAnnotations"); | |
1334 ResourceMark rm(THREAD); | |
1335 // Return null for arrays and primitives | |
1336 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1337 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1338 if (Klass::cast(k)->oop_is_instance()) { | |
1339 return (jbyteArray) JNIHandles::make_local(env, | |
1340 instanceKlass::cast(k)->class_annotations()); | |
1341 } | |
1342 } | |
1343 return NULL; | |
1344 JVM_END | |
1345 | |
1346 | |
1347 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) | |
1348 assert(field != NULL, "illegal field"); | |
1349 JVMWrapper("JVM_GetFieldAnnotations"); | |
1350 | |
1351 // some of this code was adapted from from jni_FromReflectedField | |
1352 | |
1353 // field is a handle to a java.lang.reflect.Field object | |
1354 oop reflected = JNIHandles::resolve_non_null(field); | |
1355 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
1356 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1357 int slot = java_lang_reflect_Field::slot(reflected); | |
1358 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
1359 | |
1360 fieldDescriptor fd; | |
1361 KlassHandle kh(THREAD, k); | |
1362 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot); | |
1363 | |
1364 if (modifiers & JVM_ACC_STATIC) { | |
1365 // for static fields we only look in the current class | |
1366 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, | |
1367 true, &fd)) { | |
1368 assert(false, "cannot find static field"); | |
1369 return NULL; // robustness | |
1370 } | |
1371 } else { | |
1372 // for instance fields we start with the current class and work | |
1373 // our way up through the superclass chain | |
1374 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, | |
1375 &fd)) { | |
1376 assert(false, "cannot find instance field"); | |
1377 return NULL; // robustness | |
1378 } | |
1379 } | |
1380 | |
1381 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); | |
1382 JVM_END | |
1383 | |
1384 | |
1385 static methodOop jvm_get_method_common(jobject method, TRAPS) { | |
1386 // some of this code was adapted from from jni_FromReflectedMethod | |
1387 | |
1388 oop reflected = JNIHandles::resolve_non_null(method); | |
1389 oop mirror = NULL; | |
1390 int slot = 0; | |
1391 | |
1392 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) { | |
1393 mirror = java_lang_reflect_Constructor::clazz(reflected); | |
1394 slot = java_lang_reflect_Constructor::slot(reflected); | |
1395 } else { | |
1396 assert(reflected->klass() == SystemDictionary::reflect_method_klass(), | |
1397 "wrong type"); | |
1398 mirror = java_lang_reflect_Method::clazz(reflected); | |
1399 slot = java_lang_reflect_Method::slot(reflected); | |
1400 } | |
1401 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1402 | |
1403 KlassHandle kh(THREAD, k); | |
1404 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); | |
1405 if (m == NULL) { | |
1406 assert(false, "cannot find method"); | |
1407 return NULL; // robustness | |
1408 } | |
1409 | |
1410 return m; | |
1411 } | |
1412 | |
1413 | |
1414 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) | |
1415 JVMWrapper("JVM_GetMethodAnnotations"); | |
1416 | |
1417 // method is a handle to a java.lang.reflect.Method object | |
1418 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1419 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); | |
1420 JVM_END | |
1421 | |
1422 | |
1423 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) | |
1424 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); | |
1425 | |
1426 // method is a handle to a java.lang.reflect.Method object | |
1427 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1428 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); | |
1429 JVM_END | |
1430 | |
1431 | |
1432 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) | |
1433 JVMWrapper("JVM_GetMethodParameterAnnotations"); | |
1434 | |
1435 // method is a handle to a java.lang.reflect.Method object | |
1436 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1437 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); | |
1438 JVM_END | |
1439 | |
1440 | |
1441 // New (JDK 1.4) reflection implementation ///////////////////////////////////// | |
1442 | |
1443 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1444 { | |
1445 JVMWrapper("JVM_GetClassDeclaredFields"); | |
1446 JvmtiVMObjectAllocEventCollector oam; | |
1447 | |
1448 // Exclude primitive types and array types | |
1449 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1450 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1451 // Return empty array | |
1452 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL); | |
1453 return (jobjectArray) JNIHandles::make_local(env, res); | |
1454 } | |
1455 | |
1456 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1457 constantPoolHandle cp(THREAD, k->constants()); | |
1458 | |
1459 // Ensure class is linked | |
1460 k->link_class(CHECK_NULL); | |
1461 | |
1462 typeArrayHandle fields(THREAD, k->fields()); | |
1463 int fields_len = fields->length(); | |
1464 | |
1465 // 4496456 We need to filter out java.lang.Throwable.backtrace | |
1466 bool skip_backtrace = false; | |
1467 | |
1468 // Allocate result | |
1469 int num_fields; | |
1470 | |
1471 if (publicOnly) { | |
1472 num_fields = 0; | |
1473 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) { | |
1474 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
1475 if (mods & JVM_ACC_PUBLIC) ++num_fields; | |
1476 } | |
1477 } else { | |
1478 num_fields = fields_len / instanceKlass::next_offset; | |
1479 | |
1480 if (k() == SystemDictionary::throwable_klass()) { | |
1481 num_fields--; | |
1482 skip_backtrace = true; | |
1483 } | |
1484 } | |
1485 | |
1486 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL); | |
1487 objArrayHandle result (THREAD, r); | |
1488 | |
1489 int out_idx = 0; | |
1490 fieldDescriptor fd; | |
1491 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) { | |
1492 if (skip_backtrace) { | |
1493 // 4496456 skip java.lang.Throwable.backtrace | |
1494 int offset = k->offset_from_fields(i); | |
1495 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; | |
1496 } | |
1497 | |
1498 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
1499 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) { | |
1500 fd.initialize(k(), i); | |
1501 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); | |
1502 result->obj_at_put(out_idx, field); | |
1503 ++out_idx; | |
1504 } | |
1505 } | |
1506 assert(out_idx == num_fields, "just checking"); | |
1507 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1508 } | |
1509 JVM_END | |
1510 | |
1511 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1512 { | |
1513 JVMWrapper("JVM_GetClassDeclaredMethods"); | |
1514 JvmtiVMObjectAllocEventCollector oam; | |
1515 | |
1516 // Exclude primitive types and array types | |
1517 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1518 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1519 // Return empty array | |
1520 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL); | |
1521 return (jobjectArray) JNIHandles::make_local(env, res); | |
1522 } | |
1523 | |
1524 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1525 | |
1526 // Ensure class is linked | |
1527 k->link_class(CHECK_NULL); | |
1528 | |
1529 objArrayHandle methods (THREAD, k->methods()); | |
1530 int methods_length = methods->length(); | |
1531 int num_methods = 0; | |
1532 | |
1533 int i; | |
1534 for (i = 0; i < methods_length; i++) { | |
1535 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1536 if (!method->is_initializer()) { | |
1537 if (!publicOnly || method->is_public()) { | |
1538 ++num_methods; | |
1539 } | |
1540 } | |
1541 } | |
1542 | |
1543 // Allocate result | |
1544 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL); | |
1545 objArrayHandle result (THREAD, r); | |
1546 | |
1547 int out_idx = 0; | |
1548 for (i = 0; i < methods_length; i++) { | |
1549 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1550 if (!method->is_initializer()) { | |
1551 if (!publicOnly || method->is_public()) { | |
1552 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); | |
1553 result->obj_at_put(out_idx, m); | |
1554 ++out_idx; | |
1555 } | |
1556 } | |
1557 } | |
1558 assert(out_idx == num_methods, "just checking"); | |
1559 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1560 } | |
1561 JVM_END | |
1562 | |
1563 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1564 { | |
1565 JVMWrapper("JVM_GetClassDeclaredConstructors"); | |
1566 JvmtiVMObjectAllocEventCollector oam; | |
1567 | |
1568 // Exclude primitive types and array types | |
1569 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1570 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1571 // Return empty array | |
1572 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL); | |
1573 return (jobjectArray) JNIHandles::make_local(env, res); | |
1574 } | |
1575 | |
1576 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1577 | |
1578 // Ensure class is linked | |
1579 k->link_class(CHECK_NULL); | |
1580 | |
1581 objArrayHandle methods (THREAD, k->methods()); | |
1582 int methods_length = methods->length(); | |
1583 int num_constructors = 0; | |
1584 | |
1585 int i; | |
1586 for (i = 0; i < methods_length; i++) { | |
1587 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1588 if (method->is_initializer() && !method->is_static()) { | |
1589 if (!publicOnly || method->is_public()) { | |
1590 ++num_constructors; | |
1591 } | |
1592 } | |
1593 } | |
1594 | |
1595 // Allocate result | |
1596 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL); | |
1597 objArrayHandle result(THREAD, r); | |
1598 | |
1599 int out_idx = 0; | |
1600 for (i = 0; i < methods_length; i++) { | |
1601 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1602 if (method->is_initializer() && !method->is_static()) { | |
1603 if (!publicOnly || method->is_public()) { | |
1604 oop m = Reflection::new_constructor(method, CHECK_NULL); | |
1605 result->obj_at_put(out_idx, m); | |
1606 ++out_idx; | |
1607 } | |
1608 } | |
1609 } | |
1610 assert(out_idx == num_constructors, "just checking"); | |
1611 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1612 } | |
1613 JVM_END | |
1614 | |
1615 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) | |
1616 { | |
1617 JVMWrapper("JVM_GetClassAccessFlags"); | |
1618 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1619 // Primitive type | |
1620 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1621 } | |
1622 | |
1623 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1624 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; | |
1625 } | |
1626 JVM_END | |
1627 | |
1628 | |
1629 // Constant pool access ////////////////////////////////////////////////////////// | |
1630 | |
1631 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) | |
1632 { | |
1633 JVMWrapper("JVM_GetClassConstantPool"); | |
1634 JvmtiVMObjectAllocEventCollector oam; | |
1635 | |
1636 // Return null for primitives and arrays | |
1637 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1638 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1639 if (Klass::cast(k)->oop_is_instance()) { | |
1640 instanceKlassHandle k_h(THREAD, k); | |
1641 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); | |
1642 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); | |
1643 return JNIHandles::make_local(jcp()); | |
1644 } | |
1645 } | |
1646 return NULL; | |
1647 } | |
1648 JVM_END | |
1649 | |
1650 | |
1651 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) | |
1652 { | |
1653 JVMWrapper("JVM_ConstantPoolGetSize"); | |
1654 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1655 return cp->length(); | |
1656 } | |
1657 JVM_END | |
1658 | |
1659 | |
1660 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { | |
1661 if (!cp->is_within_bounds(index)) { | |
1662 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); | |
1663 } | |
1664 } | |
1665 | |
1666 | |
1667 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1668 { | |
1669 JVMWrapper("JVM_ConstantPoolGetClassAt"); | |
1670 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1671 bounds_check(cp, index, CHECK_NULL); | |
1672 constantTag tag = cp->tag_at(index); | |
1673 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1674 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1675 } | |
1676 klassOop k = cp->klass_at(index, CHECK_NULL); | |
1677 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); | |
1678 } | |
1679 JVM_END | |
1680 | |
1681 | |
1682 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1683 { | |
1684 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); | |
1685 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1686 bounds_check(cp, index, CHECK_NULL); | |
1687 constantTag tag = cp->tag_at(index); | |
1688 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1689 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1690 } | |
1691 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); | |
1692 if (k == NULL) return NULL; | |
1693 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); | |
1694 } | |
1695 JVM_END | |
1696 | |
1697 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1698 constantTag tag = cp->tag_at(index); | |
1699 if (!tag.is_method() && !tag.is_interface_method()) { | |
1700 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1701 } | |
1702 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1703 klassOop k_o; | |
1704 if (force_resolution) { | |
1705 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1706 } else { | |
1707 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1708 if (k_o == NULL) return NULL; | |
1709 } | |
1710 instanceKlassHandle k(THREAD, k_o); | |
1711 symbolOop name = cp->uncached_name_ref_at(index); | |
1712 symbolOop sig = cp->uncached_signature_ref_at(index); | |
1713 methodHandle m (THREAD, k->find_method(name, sig)); | |
1714 if (m.is_null()) { | |
1715 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); | |
1716 } | |
1717 oop method; | |
1718 if (!m->is_initializer() || m->is_static()) { | |
1719 method = Reflection::new_method(m, true, true, CHECK_NULL); | |
1720 } else { | |
1721 method = Reflection::new_constructor(m, CHECK_NULL); | |
1722 } | |
1723 return JNIHandles::make_local(method); | |
1724 } | |
1725 | |
1726 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1727 { | |
1728 JVMWrapper("JVM_ConstantPoolGetMethodAt"); | |
1729 JvmtiVMObjectAllocEventCollector oam; | |
1730 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1731 bounds_check(cp, index, CHECK_NULL); | |
1732 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); | |
1733 return res; | |
1734 } | |
1735 JVM_END | |
1736 | |
1737 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1738 { | |
1739 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); | |
1740 JvmtiVMObjectAllocEventCollector oam; | |
1741 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1742 bounds_check(cp, index, CHECK_NULL); | |
1743 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); | |
1744 return res; | |
1745 } | |
1746 JVM_END | |
1747 | |
1748 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1749 constantTag tag = cp->tag_at(index); | |
1750 if (!tag.is_field()) { | |
1751 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1752 } | |
1753 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1754 klassOop k_o; | |
1755 if (force_resolution) { | |
1756 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1757 } else { | |
1758 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1759 if (k_o == NULL) return NULL; | |
1760 } | |
1761 instanceKlassHandle k(THREAD, k_o); | |
1762 symbolOop name = cp->uncached_name_ref_at(index); | |
1763 symbolOop sig = cp->uncached_signature_ref_at(index); | |
1764 fieldDescriptor fd; | |
1765 klassOop target_klass = k->find_field(name, sig, &fd); | |
1766 if (target_klass == NULL) { | |
1767 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); | |
1768 } | |
1769 oop field = Reflection::new_field(&fd, true, CHECK_NULL); | |
1770 return JNIHandles::make_local(field); | |
1771 } | |
1772 | |
1773 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1774 { | |
1775 JVMWrapper("JVM_ConstantPoolGetFieldAt"); | |
1776 JvmtiVMObjectAllocEventCollector oam; | |
1777 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1778 bounds_check(cp, index, CHECK_NULL); | |
1779 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); | |
1780 return res; | |
1781 } | |
1782 JVM_END | |
1783 | |
1784 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1785 { | |
1786 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); | |
1787 JvmtiVMObjectAllocEventCollector oam; | |
1788 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1789 bounds_check(cp, index, CHECK_NULL); | |
1790 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); | |
1791 return res; | |
1792 } | |
1793 JVM_END | |
1794 | |
1795 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1796 { | |
1797 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); | |
1798 JvmtiVMObjectAllocEventCollector oam; | |
1799 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1800 bounds_check(cp, index, CHECK_NULL); | |
1801 constantTag tag = cp->tag_at(index); | |
1802 if (!tag.is_field_or_method()) { | |
1803 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1804 } | |
1805 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1806 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref)); | |
1807 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index)); | |
1808 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index)); | |
1809 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL); | |
1810 objArrayHandle dest(THREAD, dest_o); | |
1811 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); | |
1812 dest->obj_at_put(0, str()); | |
1813 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); | |
1814 dest->obj_at_put(1, str()); | |
1815 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); | |
1816 dest->obj_at_put(2, str()); | |
1817 return (jobjectArray) JNIHandles::make_local(dest()); | |
1818 } | |
1819 JVM_END | |
1820 | |
1821 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1822 { | |
1823 JVMWrapper("JVM_ConstantPoolGetIntAt"); | |
1824 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1825 bounds_check(cp, index, CHECK_0); | |
1826 constantTag tag = cp->tag_at(index); | |
1827 if (!tag.is_int()) { | |
1828 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1829 } | |
1830 return cp->int_at(index); | |
1831 } | |
1832 JVM_END | |
1833 | |
1834 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1835 { | |
1836 JVMWrapper("JVM_ConstantPoolGetLongAt"); | |
1837 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1838 bounds_check(cp, index, CHECK_(0L)); | |
1839 constantTag tag = cp->tag_at(index); | |
1840 if (!tag.is_long()) { | |
1841 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1842 } | |
1843 return cp->long_at(index); | |
1844 } | |
1845 JVM_END | |
1846 | |
1847 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1848 { | |
1849 JVMWrapper("JVM_ConstantPoolGetFloatAt"); | |
1850 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1851 bounds_check(cp, index, CHECK_(0.0f)); | |
1852 constantTag tag = cp->tag_at(index); | |
1853 if (!tag.is_float()) { | |
1854 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1855 } | |
1856 return cp->float_at(index); | |
1857 } | |
1858 JVM_END | |
1859 | |
1860 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1861 { | |
1862 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); | |
1863 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1864 bounds_check(cp, index, CHECK_(0.0)); | |
1865 constantTag tag = cp->tag_at(index); | |
1866 if (!tag.is_double()) { | |
1867 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1868 } | |
1869 return cp->double_at(index); | |
1870 } | |
1871 JVM_END | |
1872 | |
1873 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1874 { | |
1875 JVMWrapper("JVM_ConstantPoolGetStringAt"); | |
1876 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1877 bounds_check(cp, index, CHECK_NULL); | |
1878 constantTag tag = cp->tag_at(index); | |
1879 if (!tag.is_string() && !tag.is_unresolved_string()) { | |
1880 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1881 } | |
1882 oop str = cp->string_at(index, CHECK_NULL); | |
1883 return (jstring) JNIHandles::make_local(str); | |
1884 } | |
1885 JVM_END | |
1886 | |
1887 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1888 { | |
1889 JVMWrapper("JVM_ConstantPoolGetUTF8At"); | |
1890 JvmtiVMObjectAllocEventCollector oam; | |
1891 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1892 bounds_check(cp, index, CHECK_NULL); | |
1893 constantTag tag = cp->tag_at(index); | |
1894 if (!tag.is_symbol()) { | |
1895 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1896 } | |
1897 symbolOop sym_o = cp->symbol_at(index); | |
1898 symbolHandle sym(THREAD, sym_o); | |
1899 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
1900 return (jstring) JNIHandles::make_local(str()); | |
1901 } | |
1902 JVM_END | |
1903 | |
1904 | |
1905 // Assertion support. ////////////////////////////////////////////////////////// | |
1906 | |
1907 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) | |
1908 JVMWrapper("JVM_DesiredAssertionStatus"); | |
1909 assert(cls != NULL, "bad class"); | |
1910 | |
1911 oop r = JNIHandles::resolve(cls); | |
1912 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); | |
1913 if (java_lang_Class::is_primitive(r)) return false; | |
1914 | |
1915 klassOop k = java_lang_Class::as_klassOop(r); | |
1916 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); | |
1917 if (! Klass::cast(k)->oop_is_instance()) return false; | |
1918 | |
1919 ResourceMark rm(THREAD); | |
1920 const char* name = Klass::cast(k)->name()->as_C_string(); | |
1921 bool system_class = Klass::cast(k)->class_loader() == NULL; | |
1922 return JavaAssertions::enabled(name, system_class); | |
1923 | |
1924 JVM_END | |
1925 | |
1926 | |
1927 // Return a new AssertionStatusDirectives object with the fields filled in with | |
1928 // command-line assertion arguments (i.e., -ea, -da). | |
1929 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) | |
1930 JVMWrapper("JVM_AssertionStatusDirectives"); | |
1931 JvmtiVMObjectAllocEventCollector oam; | |
1932 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); | |
1933 return JNIHandles::make_local(env, asd); | |
1934 JVM_END | |
1935 | |
1936 // Verification //////////////////////////////////////////////////////////////////////////////// | |
1937 | |
1938 // Reflection for the verifier ///////////////////////////////////////////////////////////////// | |
1939 | |
1940 // RedefineClasses support: bug 6214132 caused verification to fail. | |
1941 // All functions from this section should call the jvmtiThreadSate function: | |
1942 // klassOop class_to_verify_considering_redefinition(klassOop klass). | |
1943 // The function returns a klassOop of the _scratch_class if the verifier | |
1944 // was invoked in the middle of the class redefinition. | |
1945 // Otherwise it returns its argument value which is the _the_class klassOop. | |
1946 // Please, refer to the description in the jvmtiThreadSate.hpp. | |
1947 | |
1948 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) | |
1949 JVMWrapper("JVM_GetClassNameUTF"); | |
1950 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1951 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
1952 return Klass::cast(k)->name()->as_utf8(); | |
1953 JVM_END | |
1954 | |
1955 | |
1956 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) | |
1957 JVMWrapper("JVM_GetClassCPTypes"); | |
1958 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1959 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
1960 // types will have length zero if this is not an instanceKlass | |
1961 // (length is determined by call to JVM_GetClassCPEntriesCount) | |
1962 if (Klass::cast(k)->oop_is_instance()) { | |
1963 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
1964 for (int index = cp->length() - 1; index >= 0; index--) { | |
1965 constantTag tag = cp->tag_at(index); | |
1966 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : | |
1967 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); | |
1968 } | |
1969 } | |
1970 JVM_END | |
1971 | |
1972 | |
1973 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) | |
1974 JVMWrapper("JVM_GetClassCPEntriesCount"); | |
1975 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1976 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
1977 if (!Klass::cast(k)->oop_is_instance()) | |
1978 return 0; | |
1979 return instanceKlass::cast(k)->constants()->length(); | |
1980 JVM_END | |
1981 | |
1982 | |
1983 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) | |
1984 JVMWrapper("JVM_GetClassFieldsCount"); | |
1985 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1986 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
1987 if (!Klass::cast(k)->oop_is_instance()) | |
1988 return 0; | |
1989 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset; | |
1990 JVM_END | |
1991 | |
1992 | |
1993 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) | |
1994 JVMWrapper("JVM_GetClassMethodsCount"); | |
1995 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1996 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
1997 if (!Klass::cast(k)->oop_is_instance()) | |
1998 return 0; | |
1999 return instanceKlass::cast(k)->methods()->length(); | |
2000 JVM_END | |
2001 | |
2002 | |
2003 // The following methods, used for the verifier, are never called with | |
2004 // array klasses, so a direct cast to instanceKlass is safe. | |
2005 // Typically, these methods are called in a loop with bounds determined | |
2006 // by the results of JVM_GetClass{Fields,Methods}Count, which return | |
2007 // zero for arrays. | |
2008 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) | |
2009 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); | |
2010 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2011 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2012 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2013 int length = methodOop(method)->checked_exceptions_length(); | |
2014 if (length > 0) { | |
2015 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); | |
2016 for (int i = 0; i < length; i++) { | |
2017 exceptions[i] = table[i].class_cp_index; | |
2018 } | |
2019 } | |
2020 JVM_END | |
2021 | |
2022 | |
2023 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) | |
2024 JVMWrapper("JVM_GetMethodIxExceptionsCount"); | |
2025 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2026 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2027 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2028 return methodOop(method)->checked_exceptions_length(); | |
2029 JVM_END | |
2030 | |
2031 | |
2032 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) | |
2033 JVMWrapper("JVM_GetMethodIxByteCode"); | |
2034 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2035 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2036 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2037 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); | |
2038 JVM_END | |
2039 | |
2040 | |
2041 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) | |
2042 JVMWrapper("JVM_GetMethodIxByteCodeLength"); | |
2043 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2044 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2045 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2046 return methodOop(method)->code_size(); | |
2047 JVM_END | |
2048 | |
2049 | |
2050 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) | |
2051 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); | |
2052 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2053 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2054 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2055 typeArrayOop extable = methodOop(method)->exception_table(); | |
2056 entry->start_pc = extable->int_at(entry_index * 4); | |
2057 entry->end_pc = extable->int_at(entry_index * 4 + 1); | |
2058 entry->handler_pc = extable->int_at(entry_index * 4 + 2); | |
2059 entry->catchType = extable->int_at(entry_index * 4 + 3); | |
2060 JVM_END | |
2061 | |
2062 | |
2063 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) | |
2064 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); | |
2065 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2066 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2067 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2068 return methodOop(method)->exception_table()->length() / 4; | |
2069 JVM_END | |
2070 | |
2071 | |
2072 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) | |
2073 JVMWrapper("JVM_GetMethodIxModifiers"); | |
2074 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2075 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2076 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2077 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2078 JVM_END | |
2079 | |
2080 | |
2081 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) | |
2082 JVMWrapper("JVM_GetFieldIxModifiers"); | |
2083 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2084 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2085 typeArrayOop fields = instanceKlass::cast(k)->fields(); | |
2086 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
2087 JVM_END | |
2088 | |
2089 | |
2090 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) | |
2091 JVMWrapper("JVM_GetMethodIxLocalsCount"); | |
2092 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2093 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2094 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2095 return methodOop(method)->max_locals(); | |
2096 JVM_END | |
2097 | |
2098 | |
2099 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) | |
2100 JVMWrapper("JVM_GetMethodIxArgsSize"); | |
2101 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2102 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2103 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2104 return methodOop(method)->size_of_parameters(); | |
2105 JVM_END | |
2106 | |
2107 | |
2108 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) | |
2109 JVMWrapper("JVM_GetMethodIxMaxStack"); | |
2110 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2111 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2112 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2113 return methodOop(method)->max_stack(); | |
2114 JVM_END | |
2115 | |
2116 | |
2117 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) | |
2118 JVMWrapper("JVM_IsConstructorIx"); | |
2119 ResourceMark rm(THREAD); | |
2120 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2121 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2122 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2123 return methodOop(method)->name() == vmSymbols::object_initializer_name(); | |
2124 JVM_END | |
2125 | |
2126 | |
2127 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2128 JVMWrapper("JVM_GetMethodIxIxUTF"); | |
2129 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2130 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2131 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2132 return methodOop(method)->name()->as_utf8(); | |
2133 JVM_END | |
2134 | |
2135 | |
2136 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2137 JVMWrapper("JVM_GetMethodIxSignatureUTF"); | |
2138 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2139 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2140 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2141 return methodOop(method)->signature()->as_utf8(); | |
2142 JVM_END | |
2143 | |
2144 /** | |
2145 * All of these JVM_GetCP-xxx methods are used by the old verifier to | |
2146 * read entries in the constant pool. Since the old verifier always | |
2147 * works on a copy of the code, it will not see any rewriting that | |
2148 * may possibly occur in the middle of verification. So it is important | |
2149 * that nothing it calls tries to use the cpCache instead of the raw | |
2150 * constant pool, so we must use cp->uncached_x methods when appropriate. | |
2151 */ | |
2152 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2153 JVMWrapper("JVM_GetCPFieldNameUTF"); | |
2154 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2155 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2156 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2157 switch (cp->tag_at(cp_index).value()) { | |
2158 case JVM_CONSTANT_Fieldref: | |
2159 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
2160 default: | |
2161 fatal("JVM_GetCPFieldNameUTF: illegal constant"); | |
2162 } | |
2163 ShouldNotReachHere(); | |
2164 return NULL; | |
2165 JVM_END | |
2166 | |
2167 | |
2168 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2169 JVMWrapper("JVM_GetCPMethodNameUTF"); | |
2170 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2171 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2172 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2173 switch (cp->tag_at(cp_index).value()) { | |
2174 case JVM_CONSTANT_InterfaceMethodref: | |
2175 case JVM_CONSTANT_Methodref: | |
2176 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
2177 default: | |
2178 fatal("JVM_GetCPMethodNameUTF: illegal constant"); | |
2179 } | |
2180 ShouldNotReachHere(); | |
2181 return NULL; | |
2182 JVM_END | |
2183 | |
2184 | |
2185 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2186 JVMWrapper("JVM_GetCPMethodSignatureUTF"); | |
2187 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2188 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2189 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2190 switch (cp->tag_at(cp_index).value()) { | |
2191 case JVM_CONSTANT_InterfaceMethodref: | |
2192 case JVM_CONSTANT_Methodref: | |
2193 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
2194 default: | |
2195 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); | |
2196 } | |
2197 ShouldNotReachHere(); | |
2198 return NULL; | |
2199 JVM_END | |
2200 | |
2201 | |
2202 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2203 JVMWrapper("JVM_GetCPFieldSignatureUTF"); | |
2204 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2205 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2206 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2207 switch (cp->tag_at(cp_index).value()) { | |
2208 case JVM_CONSTANT_Fieldref: | |
2209 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
2210 default: | |
2211 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); | |
2212 } | |
2213 ShouldNotReachHere(); | |
2214 return NULL; | |
2215 JVM_END | |
2216 | |
2217 | |
2218 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2219 JVMWrapper("JVM_GetCPClassNameUTF"); | |
2220 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2221 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2222 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2223 symbolOop classname = cp->klass_name_at(cp_index); | |
2224 return classname->as_utf8(); | |
2225 JVM_END | |
2226 | |
2227 | |
2228 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2229 JVMWrapper("JVM_GetCPFieldClassNameUTF"); | |
2230 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2231 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2232 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2233 switch (cp->tag_at(cp_index).value()) { | |
2234 case JVM_CONSTANT_Fieldref: { | |
2235 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
2236 symbolOop classname = cp->klass_name_at(class_index); | |
2237 return classname->as_utf8(); | |
2238 } | |
2239 default: | |
2240 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); | |
2241 } | |
2242 ShouldNotReachHere(); | |
2243 return NULL; | |
2244 JVM_END | |
2245 | |
2246 | |
2247 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2248 JVMWrapper("JVM_GetCPMethodClassNameUTF"); | |
2249 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2250 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2251 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2252 switch (cp->tag_at(cp_index).value()) { | |
2253 case JVM_CONSTANT_Methodref: | |
2254 case JVM_CONSTANT_InterfaceMethodref: { | |
2255 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
2256 symbolOop classname = cp->klass_name_at(class_index); | |
2257 return classname->as_utf8(); | |
2258 } | |
2259 default: | |
2260 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); | |
2261 } | |
2262 ShouldNotReachHere(); | |
2263 return NULL; | |
2264 JVM_END | |
2265 | |
2266 | |
2267 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2268 JVMWrapper("JVM_GetCPFieldModifiers"); | |
2269 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2270 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2271 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2272 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2273 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2274 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); | |
2275 switch (cp->tag_at(cp_index).value()) { | |
2276 case JVM_CONSTANT_Fieldref: { | |
2277 symbolOop name = cp->uncached_name_ref_at(cp_index); | |
2278 symbolOop signature = cp->uncached_signature_ref_at(cp_index); | |
2279 typeArrayOop fields = instanceKlass::cast(k_called)->fields(); | |
2280 int fields_count = fields->length(); | |
2281 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) { | |
2282 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name && | |
2283 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) { | |
2284 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
2285 } | |
2286 } | |
2287 return -1; | |
2288 } | |
2289 default: | |
2290 fatal("JVM_GetCPFieldModifiers: illegal constant"); | |
2291 } | |
2292 ShouldNotReachHere(); | |
2293 return 0; | |
2294 JVM_END | |
2295 | |
2296 | |
2297 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2298 JVMWrapper("JVM_GetCPMethodModifiers"); | |
2299 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2300 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2301 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2302 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2303 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2304 switch (cp->tag_at(cp_index).value()) { | |
2305 case JVM_CONSTANT_Methodref: | |
2306 case JVM_CONSTANT_InterfaceMethodref: { | |
2307 symbolOop name = cp->uncached_name_ref_at(cp_index); | |
2308 symbolOop signature = cp->uncached_signature_ref_at(cp_index); | |
2309 objArrayOop methods = instanceKlass::cast(k_called)->methods(); | |
2310 int methods_count = methods->length(); | |
2311 for (int i = 0; i < methods_count; i++) { | |
2312 methodOop method = methodOop(methods->obj_at(i)); | |
2313 if (method->name() == name && method->signature() == signature) { | |
2314 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2315 } | |
2316 } | |
2317 return -1; | |
2318 } | |
2319 default: | |
2320 fatal("JVM_GetCPMethodModifiers: illegal constant"); | |
2321 } | |
2322 ShouldNotReachHere(); | |
2323 return 0; | |
2324 JVM_END | |
2325 | |
2326 | |
2327 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// | |
2328 | |
2329 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) | |
2330 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything | |
2331 JVM_END | |
2332 | |
2333 | |
2334 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) | |
2335 JVMWrapper("JVM_IsSameClassPackage"); | |
2336 oop class1_mirror = JNIHandles::resolve_non_null(class1); | |
2337 oop class2_mirror = JNIHandles::resolve_non_null(class2); | |
2338 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); | |
2339 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); | |
2340 return (jboolean) Reflection::is_same_class_package(klass1, klass2); | |
2341 JVM_END | |
2342 | |
2343 | |
2344 // IO functions //////////////////////////////////////////////////////////////////////////////////////// | |
2345 | |
2346 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) | |
2347 JVMWrapper2("JVM_Open (%s)", fname); | |
2348 | |
2349 //%note jvm_r6 | |
2350 int result = hpi::open(fname, flags, mode); | |
2351 if (result >= 0) { | |
2352 return result; | |
2353 } else { | |
2354 switch(errno) { | |
2355 case EEXIST: | |
2356 return JVM_EEXIST; | |
2357 default: | |
2358 return -1; | |
2359 } | |
2360 } | |
2361 JVM_END | |
2362 | |
2363 | |
2364 JVM_LEAF(jint, JVM_Close(jint fd)) | |
2365 JVMWrapper2("JVM_Close (0x%x)", fd); | |
2366 //%note jvm_r6 | |
2367 return hpi::close(fd); | |
2368 JVM_END | |
2369 | |
2370 | |
2371 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) | |
2372 JVMWrapper2("JVM_Read (0x%x)", fd); | |
2373 | |
2374 //%note jvm_r6 | |
2375 return (jint)hpi::read(fd, buf, nbytes); | |
2376 JVM_END | |
2377 | |
2378 | |
2379 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) | |
2380 JVMWrapper2("JVM_Write (0x%x)", fd); | |
2381 | |
2382 //%note jvm_r6 | |
2383 return (jint)hpi::write(fd, buf, nbytes); | |
2384 JVM_END | |
2385 | |
2386 | |
2387 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) | |
2388 JVMWrapper2("JVM_Available (0x%x)", fd); | |
2389 //%note jvm_r6 | |
2390 return hpi::available(fd, pbytes); | |
2391 JVM_END | |
2392 | |
2393 | |
2394 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) | |
2395 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); | |
2396 //%note jvm_r6 | |
2397 return hpi::lseek(fd, offset, whence); | |
2398 JVM_END | |
2399 | |
2400 | |
2401 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) | |
2402 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); | |
2403 return hpi::ftruncate(fd, length); | |
2404 JVM_END | |
2405 | |
2406 | |
2407 JVM_LEAF(jint, JVM_Sync(jint fd)) | |
2408 JVMWrapper2("JVM_Sync (0x%x)", fd); | |
2409 //%note jvm_r6 | |
2410 return hpi::fsync(fd); | |
2411 JVM_END | |
2412 | |
2413 | |
2414 // Printing support ////////////////////////////////////////////////// | |
2415 extern "C" { | |
2416 | |
2417 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { | |
2418 // see bug 4399518, 4417214 | |
2419 if ((intptr_t)count <= 0) return -1; | |
2420 return vsnprintf(str, count, fmt, args); | |
2421 } | |
2422 | |
2423 | |
2424 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { | |
2425 va_list args; | |
2426 int len; | |
2427 va_start(args, fmt); | |
2428 len = jio_vsnprintf(str, count, fmt, args); | |
2429 va_end(args); | |
2430 return len; | |
2431 } | |
2432 | |
2433 | |
2434 int jio_fprintf(FILE* f, const char *fmt, ...) { | |
2435 int len; | |
2436 va_list args; | |
2437 va_start(args, fmt); | |
2438 len = jio_vfprintf(f, fmt, args); | |
2439 va_end(args); | |
2440 return len; | |
2441 } | |
2442 | |
2443 | |
2444 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { | |
2445 if (Arguments::vfprintf_hook() != NULL) { | |
2446 return Arguments::vfprintf_hook()(f, fmt, args); | |
2447 } else { | |
2448 return vfprintf(f, fmt, args); | |
2449 } | |
2450 } | |
2451 | |
2452 | |
2453 int jio_printf(const char *fmt, ...) { | |
2454 int len; | |
2455 va_list args; | |
2456 va_start(args, fmt); | |
2457 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); | |
2458 va_end(args); | |
2459 return len; | |
2460 } | |
2461 | |
2462 | |
2463 // HotSpot specific jio method | |
2464 void jio_print(const char* s) { | |
2465 // Try to make this function as atomic as possible. | |
2466 if (Arguments::vfprintf_hook() != NULL) { | |
2467 jio_fprintf(defaultStream::output_stream(), "%s", s); | |
2468 } else { | |
2469 ::write(defaultStream::output_fd(), s, (int)strlen(s)); | |
2470 } | |
2471 } | |
2472 | |
2473 } // Extern C | |
2474 | |
2475 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// | |
2476 | |
2477 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock | |
2478 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or | |
2479 // OSThread objects. The exception to this rule is when the target object is the thread | |
2480 // doing the operation, in which case we know that the thread won't exit until the | |
2481 // operation is done (all exits being voluntary). There are a few cases where it is | |
2482 // rather silly to do operations on yourself, like resuming yourself or asking whether | |
2483 // you are alive. While these can still happen, they are not subject to deadlocks if | |
2484 // the lock is held while the operation occurs (this is not the case for suspend, for | |
2485 // instance), and are very unlikely. Because IsAlive needs to be fast and its | |
2486 // implementation is local to this file, we always lock Threads_lock for that one. | |
2487 | |
2488 static void thread_entry(JavaThread* thread, TRAPS) { | |
2489 HandleMark hm(THREAD); | |
2490 Handle obj(THREAD, thread->threadObj()); | |
2491 JavaValue result(T_VOID); | |
2492 JavaCalls::call_virtual(&result, | |
2493 obj, | |
2494 KlassHandle(THREAD, SystemDictionary::thread_klass()), | |
2495 vmSymbolHandles::run_method_name(), | |
2496 vmSymbolHandles::void_method_signature(), | |
2497 THREAD); | |
2498 } | |
2499 | |
2500 | |
2501 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) | |
2502 JVMWrapper("JVM_StartThread"); | |
2503 JavaThread *native_thread = NULL; | |
2504 | |
2505 // We cannot hold the Threads_lock when we throw an exception, | |
2506 // due to rank ordering issues. Example: we might need to grab the | |
2507 // Heap_lock while we construct the exception. | |
2508 bool throw_illegal_thread_state = false; | |
2509 | |
2510 // We must release the Threads_lock before we can post a jvmti event | |
2511 // in Thread::start. | |
2512 { | |
2513 // Ensure that the C++ Thread and OSThread structures aren't freed before | |
2514 // we operate. | |
2515 MutexLocker mu(Threads_lock); | |
2516 | |
2517 // Check to see if we're running a thread that's already exited or was | |
2518 // stopped (is_stillborn) or is still active (thread is not NULL). | |
2519 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) || | |
2520 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { | |
2521 throw_illegal_thread_state = true; | |
2522 } else { | |
2523 jlong size = | |
2524 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); | |
2525 // Allocate the C++ Thread structure and create the native thread. The | |
2526 // stack size retrieved from java is signed, but the constructor takes | |
2527 // size_t (an unsigned type), so avoid passing negative values which would | |
2528 // result in really large stacks. | |
2529 size_t sz = size > 0 ? (size_t) size : 0; | |
2530 native_thread = new JavaThread(&thread_entry, sz); | |
2531 | |
2532 // At this point it may be possible that no osthread was created for the | |
2533 // JavaThread due to lack of memory. Check for this situation and throw | |
2534 // an exception if necessary. Eventually we may want to change this so | |
2535 // that we only grab the lock if the thread was created successfully - | |
2536 // then we can also do this check and throw the exception in the | |
2537 // JavaThread constructor. | |
2538 if (native_thread->osthread() != NULL) { | |
2539 // Note: the current thread is not being used within "prepare". | |
2540 native_thread->prepare(jthread); | |
2541 } | |
2542 } | |
2543 } | |
2544 | |
2545 if (throw_illegal_thread_state) { | |
2546 THROW(vmSymbols::java_lang_IllegalThreadStateException()); | |
2547 } | |
2548 | |
2549 assert(native_thread != NULL, "Starting null thread?"); | |
2550 | |
2551 if (native_thread->osthread() == NULL) { | |
2552 // No one should hold a reference to the 'native_thread'. | |
2553 delete native_thread; | |
2554 if (JvmtiExport::should_post_resource_exhausted()) { | |
2555 JvmtiExport::post_resource_exhausted( | |
2556 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, | |
2557 "unable to create new native thread"); | |
2558 } | |
2559 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), | |
2560 "unable to create new native thread"); | |
2561 } | |
2562 | |
2563 Thread::start(native_thread); | |
2564 | |
2565 JVM_END | |
2566 | |
2567 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints | |
2568 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, | |
2569 // but is thought to be reliable and simple. In the case, where the receiver is the | |
2570 // save thread as the sender, no safepoint is needed. | |
2571 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) | |
2572 JVMWrapper("JVM_StopThread"); | |
2573 | |
2574 oop java_throwable = JNIHandles::resolve(throwable); | |
2575 if (java_throwable == NULL) { | |
2576 THROW(vmSymbols::java_lang_NullPointerException()); | |
2577 } | |
2578 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2579 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2580 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable); | |
2581 // First check if thread already exited | |
2582 if (receiver != NULL) { | |
2583 // Check if exception is getting thrown at self (use oop equality, since the | |
2584 // target object might exit) | |
2585 if (java_thread == thread->threadObj()) { | |
2586 // This is a change from JDK 1.1, but JDK 1.2 will also do it: | |
2587 // NOTE (from JDK 1.2): this is done solely to prevent stopped | |
2588 // threads from being restarted. | |
2589 // Fix for 4314342, 4145910, perhaps others: it now doesn't have | |
2590 // any effect on the "liveness" of a thread; see | |
2591 // JVM_IsThreadAlive, below. | |
2592 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) { | |
2593 java_lang_Thread::set_stillborn(java_thread); | |
2594 } | |
2595 THROW_OOP(java_throwable); | |
2596 } else { | |
2597 // Enques a VM_Operation to stop all threads and then deliver the exception... | |
2598 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); | |
2599 } | |
2600 } | |
2601 JVM_END | |
2602 | |
2603 | |
2604 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) | |
2605 JVMWrapper("JVM_IsThreadAlive"); | |
2606 | |
2607 oop thread_oop = JNIHandles::resolve_non_null(jthread); | |
2608 return java_lang_Thread::is_alive(thread_oop); | |
2609 JVM_END | |
2610 | |
2611 | |
2612 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) | |
2613 JVMWrapper("JVM_SuspendThread"); | |
2614 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2615 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2616 | |
2617 if (receiver != NULL) { | |
2618 // thread has run and has not exited (still on threads list) | |
2619 | |
2620 { | |
2621 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); | |
2622 if (receiver->is_external_suspend()) { | |
2623 // Don't allow nested external suspend requests. We can't return | |
2624 // an error from this interface so just ignore the problem. | |
2625 return; | |
2626 } | |
2627 if (receiver->is_exiting()) { // thread is in the process of exiting | |
2628 return; | |
2629 } | |
2630 receiver->set_external_suspend(); | |
2631 } | |
2632 | |
2633 // java_suspend() will catch threads in the process of exiting | |
2634 // and will ignore them. | |
2635 receiver->java_suspend(); | |
2636 | |
2637 // It would be nice to have the following assertion in all the | |
2638 // time, but it is possible for a racing resume request to have | |
2639 // resumed this thread right after we suspended it. Temporarily | |
2640 // enable this assertion if you are chasing a different kind of | |
2641 // bug. | |
2642 // | |
2643 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || | |
2644 // receiver->is_being_ext_suspended(), "thread is not suspended"); | |
2645 } | |
2646 JVM_END | |
2647 | |
2648 | |
2649 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) | |
2650 JVMWrapper("JVM_ResumeThread"); | |
2651 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. | |
2652 // We need to *always* get the threads lock here, since this operation cannot be allowed during | |
2653 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other | |
2654 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code | |
2655 // looks at it. | |
2656 MutexLocker ml(Threads_lock); | |
2657 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2658 if (thr != NULL) { | |
2659 // the thread has run and is not in the process of exiting | |
2660 thr->java_resume(); | |
2661 } | |
2662 JVM_END | |
2663 | |
2664 | |
2665 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) | |
2666 JVMWrapper("JVM_SetThreadPriority"); | |
2667 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2668 MutexLocker ml(Threads_lock); | |
2669 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2670 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); | |
2671 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
2672 if (thr != NULL) { // Thread not yet started; priority pushed down when it is | |
2673 Thread::set_priority(thr, (ThreadPriority)prio); | |
2674 } | |
2675 JVM_END | |
2676 | |
2677 | |
2678 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) | |
2679 JVMWrapper("JVM_Yield"); | |
2680 if (os::dont_yield()) return; | |
2681 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. | |
2682 // Critical for similar threading behaviour | |
2683 if (ConvertYieldToSleep) { | |
2684 os::sleep(thread, MinSleepInterval, false); | |
2685 } else { | |
2686 os::yield(); | |
2687 } | |
2688 JVM_END | |
2689 | |
2690 | |
2691 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) | |
2692 JVMWrapper("JVM_Sleep"); | |
2693 | |
2694 if (millis < 0) { | |
2695 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); | |
2696 } | |
2697 | |
2698 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { | |
2699 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2700 } | |
2701 | |
2702 // Save current thread state and restore it at the end of this block. | |
2703 // And set new thread state to SLEEPING. | |
2704 JavaThreadSleepState jtss(thread); | |
2705 | |
2706 if (millis == 0) { | |
2707 // When ConvertSleepToYield is on, this matches the classic VM implementation of | |
2708 // JVM_Sleep. Critical for similar threading behaviour (Win32) | |
2709 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep | |
2710 // for SOLARIS | |
2711 if (ConvertSleepToYield) { | |
2712 os::yield(); | |
2713 } else { | |
2714 ThreadState old_state = thread->osthread()->get_state(); | |
2715 thread->osthread()->set_state(SLEEPING); | |
2716 os::sleep(thread, MinSleepInterval, false); | |
2717 thread->osthread()->set_state(old_state); | |
2718 } | |
2719 } else { | |
2720 ThreadState old_state = thread->osthread()->get_state(); | |
2721 thread->osthread()->set_state(SLEEPING); | |
2722 if (os::sleep(thread, millis, true) == OS_INTRPT) { | |
2723 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on | |
2724 // us while we were sleeping. We do not overwrite those. | |
2725 if (!HAS_PENDING_EXCEPTION) { | |
2726 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() | |
2727 // to properly restore the thread state. That's likely wrong. | |
2728 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2729 } | |
2730 } | |
2731 thread->osthread()->set_state(old_state); | |
2732 } | |
2733 JVM_END | |
2734 | |
2735 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) | |
2736 JVMWrapper("JVM_CurrentThread"); | |
2737 oop jthread = thread->threadObj(); | |
2738 assert (thread != NULL, "no current thread!"); | |
2739 return JNIHandles::make_local(env, jthread); | |
2740 JVM_END | |
2741 | |
2742 | |
2743 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) | |
2744 JVMWrapper("JVM_CountStackFrames"); | |
2745 | |
2746 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2747 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2748 bool throw_illegal_thread_state = false; | |
2749 int count = 0; | |
2750 | |
2751 { | |
2752 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2753 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2754 // acquire of the lock | |
2755 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2756 | |
2757 if (thr == NULL) { | |
2758 // do nothing | |
2759 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { | |
2760 // Check whether this java thread has been suspended already. If not, throws | |
2761 // IllegalThreadStateException. We defer to throw that exception until | |
2762 // Threads_lock is released since loading exception class has to leave VM. | |
2763 // The correct way to test a thread is actually suspended is | |
2764 // wait_for_ext_suspend_completion(), but we can't call that while holding | |
2765 // the Threads_lock. The above tests are sufficient for our purposes | |
2766 // provided the walkability of the stack is stable - which it isn't | |
2767 // 100% but close enough for most practical purposes. | |
2768 throw_illegal_thread_state = true; | |
2769 } else { | |
2770 // Count all java activation, i.e., number of vframes | |
2771 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { | |
2772 // Native frames are not counted | |
2773 if (!vfst.method()->is_native()) count++; | |
2774 } | |
2775 } | |
2776 } | |
2777 | |
2778 if (throw_illegal_thread_state) { | |
2779 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), | |
2780 "this thread is not suspended"); | |
2781 } | |
2782 return count; | |
2783 JVM_END | |
2784 | |
2785 // Consider: A better way to implement JVM_Interrupt() is to acquire | |
2786 // Threads_lock to resolve the jthread into a Thread pointer, fetch | |
2787 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., | |
2788 // drop Threads_lock, and the perform the unpark() and thr_kill() operations | |
2789 // outside the critical section. Threads_lock is hot so we want to minimize | |
2790 // the hold-time. A cleaner interface would be to decompose interrupt into | |
2791 // two steps. The 1st phase, performed under Threads_lock, would return | |
2792 // a closure that'd be invoked after Threads_lock was dropped. | |
2793 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and | |
2794 // admit spurious wakeups. | |
2795 | |
2796 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) | |
2797 JVMWrapper("JVM_Interrupt"); | |
2798 | |
2799 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2800 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2801 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2802 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2803 // acquire of the lock | |
2804 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2805 if (thr != NULL) { | |
2806 Thread::interrupt(thr); | |
2807 } | |
2808 JVM_END | |
2809 | |
2810 | |
2811 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) | |
2812 JVMWrapper("JVM_IsInterrupted"); | |
2813 | |
2814 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2815 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2816 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2817 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2818 // acquire of the lock | |
2819 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2820 if (thr == NULL) { | |
2821 return JNI_FALSE; | |
2822 } else { | |
2823 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); | |
2824 } | |
2825 JVM_END | |
2826 | |
2827 | |
2828 // Return true iff the current thread has locked the object passed in | |
2829 | |
2830 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) | |
2831 JVMWrapper("JVM_HoldsLock"); | |
2832 assert(THREAD->is_Java_thread(), "sanity check"); | |
2833 if (obj == NULL) { | |
2834 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
2835 } | |
2836 Handle h_obj(THREAD, JNIHandles::resolve(obj)); | |
2837 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); | |
2838 JVM_END | |
2839 | |
2840 | |
2841 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) | |
2842 JVMWrapper("JVM_DumpAllStacks"); | |
2843 VM_PrintThreads op; | |
2844 VMThread::execute(&op); | |
2845 if (JvmtiExport::should_post_data_dump()) { | |
2846 JvmtiExport::post_data_dump(); | |
2847 } | |
2848 JVM_END | |
2849 | |
2850 | |
2851 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// | |
2852 | |
2853 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { | |
2854 assert(jthread->is_Java_thread(), "must be a Java thread"); | |
2855 if (jthread->privileged_stack_top() == NULL) return false; | |
2856 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { | |
2857 oop loader = jthread->privileged_stack_top()->class_loader(); | |
2858 if (loader == NULL) return true; | |
2859 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
2860 if (trusted) return true; | |
2861 } | |
2862 return false; | |
2863 } | |
2864 | |
2865 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) | |
2866 JVMWrapper("JVM_CurrentLoadedClass"); | |
2867 ResourceMark rm(THREAD); | |
2868 | |
2869 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
2870 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
2871 bool trusted = is_trusted_frame(thread, &vfst); | |
2872 if (trusted) return NULL; | |
2873 | |
2874 methodOop m = vfst.method(); | |
2875 if (!m->is_native()) { | |
2876 klassOop holder = m->method_holder(); | |
2877 oop loader = instanceKlass::cast(holder)->class_loader(); | |
2878 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
2879 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); | |
2880 } | |
2881 } | |
2882 } | |
2883 return NULL; | |
2884 JVM_END | |
2885 | |
2886 | |
2887 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) | |
2888 JVMWrapper("JVM_CurrentClassLoader"); | |
2889 ResourceMark rm(THREAD); | |
2890 | |
2891 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
2892 | |
2893 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
2894 bool trusted = is_trusted_frame(thread, &vfst); | |
2895 if (trusted) return NULL; | |
2896 | |
2897 methodOop m = vfst.method(); | |
2898 if (!m->is_native()) { | |
2899 klassOop holder = m->method_holder(); | |
2900 assert(holder->is_klass(), "just checking"); | |
2901 oop loader = instanceKlass::cast(holder)->class_loader(); | |
2902 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
2903 return JNIHandles::make_local(env, loader); | |
2904 } | |
2905 } | |
2906 } | |
2907 return NULL; | |
2908 JVM_END | |
2909 | |
2910 | |
2911 // Utility object for collecting method holders walking down the stack | |
2912 class KlassLink: public ResourceObj { | |
2913 public: | |
2914 KlassHandle klass; | |
2915 KlassLink* next; | |
2916 | |
2917 KlassLink(KlassHandle k) { klass = k; next = NULL; } | |
2918 }; | |
2919 | |
2920 | |
2921 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) | |
2922 JVMWrapper("JVM_GetClassContext"); | |
2923 ResourceMark rm(THREAD); | |
2924 JvmtiVMObjectAllocEventCollector oam; | |
2925 // Collect linked list of (handles to) method holders | |
2926 KlassLink* first = NULL; | |
2927 KlassLink* last = NULL; | |
2928 int depth = 0; | |
2929 | |
2930 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { | |
2931 // Native frames are not returned | |
2932 if (!vfst.method()->is_native()) { | |
2933 klassOop holder = vfst.method()->method_holder(); | |
2934 assert(holder->is_klass(), "just checking"); | |
2935 depth++; | |
2936 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); | |
2937 if (first == NULL) { | |
2938 first = last = l; | |
2939 } else { | |
2940 last->next = l; | |
2941 last = l; | |
2942 } | |
2943 } | |
2944 } | |
2945 | |
2946 // Create result array of type [Ljava/lang/Class; | |
2947 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL); | |
2948 // Fill in mirrors corresponding to method holders | |
2949 int index = 0; | |
2950 while (first != NULL) { | |
2951 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); | |
2952 first = first->next; | |
2953 } | |
2954 assert(index == depth, "just checking"); | |
2955 | |
2956 return (jobjectArray) JNIHandles::make_local(env, result); | |
2957 JVM_END | |
2958 | |
2959 | |
2960 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) | |
2961 JVMWrapper("JVM_ClassDepth"); | |
2962 ResourceMark rm(THREAD); | |
2963 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
2964 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); | |
2965 | |
2966 const char* str = java_lang_String::as_utf8_string(class_name_str()); | |
2967 symbolHandle class_name_sym = | |
2968 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str))); | |
2969 if (class_name_sym.is_null()) { | |
2970 return -1; | |
2971 } | |
2972 | |
2973 int depth = 0; | |
2974 | |
2975 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
2976 if (!vfst.method()->is_native()) { | |
2977 klassOop holder = vfst.method()->method_holder(); | |
2978 assert(holder->is_klass(), "just checking"); | |
2979 if (instanceKlass::cast(holder)->name() == class_name_sym()) { | |
2980 return depth; | |
2981 } | |
2982 depth++; | |
2983 } | |
2984 } | |
2985 return -1; | |
2986 JVM_END | |
2987 | |
2988 | |
2989 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) | |
2990 JVMWrapper("JVM_ClassLoaderDepth"); | |
2991 ResourceMark rm(THREAD); | |
2992 int depth = 0; | |
2993 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
2994 // if a method in a class in a trusted loader is in a doPrivileged, return -1 | |
2995 bool trusted = is_trusted_frame(thread, &vfst); | |
2996 if (trusted) return -1; | |
2997 | |
2998 methodOop m = vfst.method(); | |
2999 if (!m->is_native()) { | |
3000 klassOop holder = m->method_holder(); | |
3001 assert(holder->is_klass(), "just checking"); | |
3002 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3003 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3004 return depth; | |
3005 } | |
3006 depth++; | |
3007 } | |
3008 } | |
3009 return -1; | |
3010 JVM_END | |
3011 | |
3012 | |
3013 // java.lang.Package //////////////////////////////////////////////////////////////// | |
3014 | |
3015 | |
3016 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) | |
3017 JVMWrapper("JVM_GetSystemPackage"); | |
3018 ResourceMark rm(THREAD); | |
3019 JvmtiVMObjectAllocEventCollector oam; | |
3020 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3021 oop result = ClassLoader::get_system_package(str, CHECK_NULL); | |
3022 return (jstring) JNIHandles::make_local(result); | |
3023 JVM_END | |
3024 | |
3025 | |
3026 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) | |
3027 JVMWrapper("JVM_GetSystemPackages"); | |
3028 JvmtiVMObjectAllocEventCollector oam; | |
3029 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); | |
3030 return (jobjectArray) JNIHandles::make_local(result); | |
3031 JVM_END | |
3032 | |
3033 | |
3034 // ObjectInputStream /////////////////////////////////////////////////////////////// | |
3035 | |
3036 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { | |
3037 if (current_class == NULL) { | |
3038 return true; | |
3039 } | |
3040 if ((current_class == field_class) || access.is_public()) { | |
3041 return true; | |
3042 } | |
3043 | |
3044 if (access.is_protected()) { | |
3045 // See if current_class is a subclass of field_class | |
3046 if (Klass::cast(current_class)->is_subclass_of(field_class)) { | |
3047 return true; | |
3048 } | |
3049 } | |
3050 | |
3051 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); | |
3052 } | |
3053 | |
3054 | |
3055 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 | |
3056 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) | |
3057 JVMWrapper("JVM_AllocateNewObject"); | |
3058 JvmtiVMObjectAllocEventCollector oam; | |
3059 // Receiver is not used | |
3060 oop curr_mirror = JNIHandles::resolve_non_null(currClass); | |
3061 oop init_mirror = JNIHandles::resolve_non_null(initClass); | |
3062 | |
3063 // Cannot instantiate primitive types | |
3064 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { | |
3065 ResourceMark rm(THREAD); | |
3066 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3067 } | |
3068 | |
3069 // Arrays not allowed here, must use JVM_AllocateNewArray | |
3070 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || | |
3071 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { | |
3072 ResourceMark rm(THREAD); | |
3073 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3074 } | |
3075 | |
3076 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); | |
3077 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); | |
3078 | |
3079 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); | |
3080 | |
3081 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. | |
3082 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); | |
3083 | |
3084 // Make sure klass is initialized, since we are about to instantiate one of them. | |
3085 curr_klass->initialize(CHECK_NULL); | |
3086 | |
3087 methodHandle m (THREAD, | |
3088 init_klass->find_method(vmSymbols::object_initializer_name(), | |
3089 vmSymbols::void_method_signature())); | |
3090 if (m.is_null()) { | |
3091 ResourceMark rm(THREAD); | |
3092 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), | |
3093 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), | |
3094 vmSymbols::object_initializer_name(), | |
3095 vmSymbols::void_method_signature())); | |
3096 } | |
3097 | |
3098 if (curr_klass == init_klass && !m->is_public()) { | |
3099 // Calling the constructor for class 'curr_klass'. | |
3100 // Only allow calls to a public no-arg constructor. | |
3101 // This path corresponds to creating an Externalizable object. | |
3102 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3103 } | |
3104 | |
3105 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { | |
3106 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' | |
3107 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3108 } | |
3109 | |
3110 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); | |
3111 // Call constructor m. This might call a constructor higher up in the hierachy | |
3112 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); | |
3113 | |
3114 return JNIHandles::make_local(obj()); | |
3115 JVM_END | |
3116 | |
3117 | |
3118 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) | |
3119 JVMWrapper("JVM_AllocateNewArray"); | |
3120 JvmtiVMObjectAllocEventCollector oam; | |
3121 oop mirror = JNIHandles::resolve_non_null(currClass); | |
3122 | |
3123 if (java_lang_Class::is_primitive(mirror)) { | |
3124 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3125 } | |
3126 klassOop k = java_lang_Class::as_klassOop(mirror); | |
3127 oop result; | |
3128 | |
3129 if (k->klass_part()->oop_is_typeArray()) { | |
3130 // typeArray | |
3131 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); | |
3132 } else if (k->klass_part()->oop_is_objArray()) { | |
3133 // objArray | |
3134 objArrayKlassHandle oak(THREAD, k); | |
3135 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) | |
3136 result = oak->allocate(length, CHECK_NULL); | |
3137 } else { | |
3138 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3139 } | |
3140 return JNIHandles::make_local(env, result); | |
3141 JVM_END | |
3142 | |
3143 | |
3144 // Return the first non-null class loader up the execution stack, or null | |
3145 // if only code from the null class loader is on the stack. | |
3146 | |
3147 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) | |
3148 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3149 // UseNewReflection | |
3150 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection | |
3151 klassOop holder = vfst.method()->method_holder(); | |
3152 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3153 if (loader != NULL) { | |
3154 return JNIHandles::make_local(env, loader); | |
3155 } | |
3156 } | |
3157 return NULL; | |
3158 JVM_END | |
3159 | |
3160 | |
3161 // Load a class relative to the most recent class on the stack with a non-null | |
3162 // classloader. | |
3163 // This function has been deprecated and should not be considered part of the | |
3164 // specified JVM interface. | |
3165 | |
3166 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, | |
3167 jclass currClass, jstring currClassName)) | |
3168 JVMWrapper("JVM_LoadClass0"); | |
3169 // Receiver is not used | |
3170 ResourceMark rm(THREAD); | |
3171 | |
3172 // Class name argument is not guaranteed to be in internal format | |
3173 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); | |
3174 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); | |
3175 | |
3176 const char* str = java_lang_String::as_utf8_string(string()); | |
3177 | |
3178 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) { | |
3179 // It's impossible to create this class; the name cannot fit | |
3180 // into the constant pool. | |
3181 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); | |
3182 } | |
3183 | |
3184 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL); | |
3185 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); | |
3186 // Find the most recent class on the stack with a non-null classloader | |
3187 oop loader = NULL; | |
3188 oop protection_domain = NULL; | |
3189 if (curr_klass.is_null()) { | |
3190 for (vframeStream vfst(thread); | |
3191 !vfst.at_end() && loader == NULL; | |
3192 vfst.next()) { | |
3193 if (!vfst.method()->is_native()) { | |
3194 klassOop holder = vfst.method()->method_holder(); | |
3195 loader = instanceKlass::cast(holder)->class_loader(); | |
3196 protection_domain = instanceKlass::cast(holder)->protection_domain(); | |
3197 } | |
3198 } | |
3199 } else { | |
3200 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); | |
3201 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); | |
3202 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); | |
3203 } | |
3204 Handle h_loader(THREAD, loader); | |
3205 Handle h_prot (THREAD, protection_domain); | |
3206 return find_class_from_class_loader(env, name, true, h_loader, h_prot, | |
3207 false, thread); | |
3208 JVM_END | |
3209 | |
3210 | |
3211 // Array /////////////////////////////////////////////////////////////////////////////////////////// | |
3212 | |
3213 | |
3214 // resolve array handle and check arguments | |
3215 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { | |
3216 if (arr == NULL) { | |
3217 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
3218 } | |
3219 oop a = JNIHandles::resolve_non_null(arr); | |
3220 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { | |
3221 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); | |
3222 } | |
3223 return arrayOop(a); | |
3224 } | |
3225 | |
3226 | |
3227 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) | |
3228 JVMWrapper("JVM_GetArrayLength"); | |
3229 arrayOop a = check_array(env, arr, false, CHECK_0); | |
3230 return a->length(); | |
3231 JVM_END | |
3232 | |
3233 | |
3234 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) | |
3235 JVMWrapper("JVM_Array_Get"); | |
3236 JvmtiVMObjectAllocEventCollector oam; | |
3237 arrayOop a = check_array(env, arr, false, CHECK_NULL); | |
3238 jvalue value; | |
3239 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); | |
3240 oop box = Reflection::box(&value, type, CHECK_NULL); | |
3241 return JNIHandles::make_local(env, box); | |
3242 JVM_END | |
3243 | |
3244 | |
3245 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) | |
3246 JVMWrapper("JVM_GetPrimitiveArrayElement"); | |
3247 jvalue value; | |
3248 value.i = 0; // to initialize value before getting used in CHECK | |
3249 arrayOop a = check_array(env, arr, true, CHECK_(value)); | |
3250 assert(a->is_typeArray(), "just checking"); | |
3251 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); | |
3252 BasicType wide_type = (BasicType) wCode; | |
3253 if (type != wide_type) { | |
3254 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
3255 } | |
3256 return value; | |
3257 JVM_END | |
3258 | |
3259 | |
3260 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) | |
3261 JVMWrapper("JVM_SetArrayElement"); | |
3262 arrayOop a = check_array(env, arr, false, CHECK); | |
3263 oop box = JNIHandles::resolve(val); | |
3264 jvalue value; | |
3265 value.i = 0; // to initialize value before getting used in CHECK | |
3266 BasicType value_type; | |
3267 if (a->is_objArray()) { | |
3268 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
3269 value_type = Reflection::unbox_for_regular_object(box, &value); | |
3270 } else { | |
3271 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
3272 } | |
3273 Reflection::array_set(&value, a, index, value_type, CHECK); | |
3274 JVM_END | |
3275 | |
3276 | |
3277 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) | |
3278 JVMWrapper("JVM_SetPrimitiveArrayElement"); | |
3279 arrayOop a = check_array(env, arr, true, CHECK); | |
3280 assert(a->is_typeArray(), "just checking"); | |
3281 BasicType value_type = (BasicType) vCode; | |
3282 Reflection::array_set(&v, a, index, value_type, CHECK); | |
3283 JVM_END | |
3284 | |
3285 | |
3286 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) | |
3287 JVMWrapper("JVM_NewArray"); | |
3288 JvmtiVMObjectAllocEventCollector oam; | |
3289 oop element_mirror = JNIHandles::resolve(eltClass); | |
3290 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); | |
3291 return JNIHandles::make_local(env, result); | |
3292 JVM_END | |
3293 | |
3294 | |
3295 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) | |
3296 JVMWrapper("JVM_NewMultiArray"); | |
3297 JvmtiVMObjectAllocEventCollector oam; | |
3298 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); | |
3299 oop element_mirror = JNIHandles::resolve(eltClass); | |
3300 assert(dim_array->is_typeArray(), "just checking"); | |
3301 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); | |
3302 return JNIHandles::make_local(env, result); | |
3303 JVM_END | |
3304 | |
3305 | |
3306 // Networking library support //////////////////////////////////////////////////////////////////// | |
3307 | |
3308 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) | |
3309 JVMWrapper("JVM_InitializeSocketLibrary"); | |
3310 return hpi::initialize_socket_library(); | |
3311 JVM_END | |
3312 | |
3313 | |
3314 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) | |
3315 JVMWrapper("JVM_Socket"); | |
3316 return hpi::socket(domain, type, protocol); | |
3317 JVM_END | |
3318 | |
3319 | |
3320 JVM_LEAF(jint, JVM_SocketClose(jint fd)) | |
3321 JVMWrapper2("JVM_SocketClose (0x%x)", fd); | |
3322 //%note jvm_r6 | |
3323 return hpi::socket_close(fd); | |
3324 JVM_END | |
3325 | |
3326 | |
3327 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) | |
3328 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); | |
3329 //%note jvm_r6 | |
3330 return hpi::socket_shutdown(fd, howto); | |
3331 JVM_END | |
3332 | |
3333 | |
3334 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) | |
3335 JVMWrapper2("JVM_Recv (0x%x)", fd); | |
3336 //%note jvm_r6 | |
3337 return hpi::recv(fd, buf, nBytes, flags); | |
3338 JVM_END | |
3339 | |
3340 | |
3341 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) | |
3342 JVMWrapper2("JVM_Send (0x%x)", fd); | |
3343 //%note jvm_r6 | |
3344 return hpi::send(fd, buf, nBytes, flags); | |
3345 JVM_END | |
3346 | |
3347 | |
3348 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) | |
3349 JVMWrapper2("JVM_Timeout (0x%x)", fd); | |
3350 //%note jvm_r6 | |
3351 return hpi::timeout(fd, timeout); | |
3352 JVM_END | |
3353 | |
3354 | |
3355 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) | |
3356 JVMWrapper2("JVM_Listen (0x%x)", fd); | |
3357 //%note jvm_r6 | |
3358 return hpi::listen(fd, count); | |
3359 JVM_END | |
3360 | |
3361 | |
3362 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) | |
3363 JVMWrapper2("JVM_Connect (0x%x)", fd); | |
3364 //%note jvm_r6 | |
3365 return hpi::connect(fd, him, len); | |
3366 JVM_END | |
3367 | |
3368 | |
3369 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) | |
3370 JVMWrapper2("JVM_Bind (0x%x)", fd); | |
3371 //%note jvm_r6 | |
3372 return hpi::bind(fd, him, len); | |
3373 JVM_END | |
3374 | |
3375 | |
3376 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) | |
3377 JVMWrapper2("JVM_Accept (0x%x)", fd); | |
3378 //%note jvm_r6 | |
3379 return hpi::accept(fd, him, (int *)len); | |
3380 JVM_END | |
3381 | |
3382 | |
3383 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) | |
3384 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); | |
3385 //%note jvm_r6 | |
3386 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen); | |
3387 JVM_END | |
3388 | |
3389 | |
3390 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) | |
3391 JVMWrapper2("JVM_GetSockName (0x%x)", fd); | |
3392 //%note jvm_r6 | |
3393 return hpi::get_sock_name(fd, him, len); | |
3394 JVM_END | |
3395 | |
3396 | |
3397 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) | |
3398 JVMWrapper2("JVM_SendTo (0x%x)", fd); | |
3399 //%note jvm_r6 | |
3400 return hpi::sendto(fd, buf, len, flags, to, tolen); | |
3401 JVM_END | |
3402 | |
3403 | |
3404 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) | |
3405 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); | |
3406 //%note jvm_r6 | |
3407 return hpi::socket_available(fd, pbytes); | |
3408 JVM_END | |
3409 | |
3410 | |
3411 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) | |
3412 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3413 //%note jvm_r6 | |
3414 return hpi::get_sock_opt(fd, level, optname, optval, optlen); | |
3415 JVM_END | |
3416 | |
3417 | |
3418 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) | |
3419 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3420 //%note jvm_r6 | |
3421 return hpi::set_sock_opt(fd, level, optname, optval, optlen); | |
3422 JVM_END | |
3423 | |
3424 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) | |
3425 JVMWrapper("JVM_GetHostName"); | |
3426 return hpi::get_host_name(name, namelen); | |
3427 JVM_END | |
3428 | |
3429 #ifdef _WINDOWS | |
3430 | |
3431 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type)) | |
3432 JVMWrapper("JVM_GetHostByAddr"); | |
3433 return hpi::get_host_by_addr(name, len, type); | |
3434 JVM_END | |
3435 | |
3436 | |
3437 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name)) | |
3438 JVMWrapper("JVM_GetHostByName"); | |
3439 return hpi::get_host_by_name(name); | |
3440 JVM_END | |
3441 | |
3442 | |
3443 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name)) | |
3444 JVMWrapper("JVM_GetProtoByName"); | |
3445 return hpi::get_proto_by_name(name); | |
3446 JVM_END | |
3447 | |
3448 #endif | |
3449 | |
3450 // Library support /////////////////////////////////////////////////////////////////////////// | |
3451 | |
3452 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) | |
3453 //%note jvm_ct | |
3454 JVMWrapper2("JVM_LoadLibrary (%s)", name); | |
3455 char ebuf[1024]; | |
3456 void *load_result; | |
3457 { | |
3458 ThreadToNativeFromVM ttnfvm(thread); | |
3459 load_result = hpi::dll_load(name, ebuf, sizeof ebuf); | |
3460 } | |
3461 if (load_result == NULL) { | |
3462 char msg[1024]; | |
3463 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); | |
3464 // Since 'ebuf' may contain a string encoded using | |
3465 // platform encoding scheme, we need to pass | |
3466 // Exceptions::unsafe_to_utf8 to the new_exception method | |
3467 // as the last argument. See bug 6367357. | |
3468 Handle h_exception = | |
3469 Exceptions::new_exception(thread, | |
3470 vmSymbols::java_lang_UnsatisfiedLinkError(), | |
3471 msg, Exceptions::unsafe_to_utf8); | |
3472 | |
3473 THROW_HANDLE_0(h_exception); | |
3474 } | |
3475 return load_result; | |
3476 JVM_END | |
3477 | |
3478 | |
3479 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) | |
3480 JVMWrapper("JVM_UnloadLibrary"); | |
3481 hpi::dll_unload(handle); | |
3482 JVM_END | |
3483 | |
3484 | |
3485 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) | |
3486 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); | |
3487 return hpi::dll_lookup(handle, name); | |
3488 JVM_END | |
3489 | |
3490 // Floating point support //////////////////////////////////////////////////////////////////// | |
3491 | |
3492 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) | |
3493 JVMWrapper("JVM_IsNaN"); | |
3494 return g_isnan(a); | |
3495 JVM_END | |
3496 | |
3497 | |
3498 | |
3499 // JNI version /////////////////////////////////////////////////////////////////////////////// | |
3500 | |
3501 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) | |
3502 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); | |
3503 return Threads::is_supported_jni_version_including_1_1(version); | |
3504 JVM_END | |
3505 | |
3506 | |
3507 // String support /////////////////////////////////////////////////////////////////////////// | |
3508 | |
3509 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) | |
3510 JVMWrapper("JVM_InternString"); | |
3511 JvmtiVMObjectAllocEventCollector oam; | |
3512 if (str == NULL) return NULL; | |
3513 oop string = JNIHandles::resolve_non_null(str); | |
3514 oop result = StringTable::intern(string, CHECK_NULL); | |
3515 return (jstring) JNIHandles::make_local(env, result); | |
3516 JVM_END | |
3517 | |
3518 | |
3519 // Raw monitor support ////////////////////////////////////////////////////////////////////// | |
3520 | |
3521 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock | |
3522 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because | |
3523 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check | |
3524 // that only works with java threads. | |
3525 | |
3526 | |
3527 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { | |
3528 VM_Exit::block_if_vm_exited(); | |
3529 JVMWrapper("JVM_RawMonitorCreate"); | |
3530 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); | |
3531 } | |
3532 | |
3533 | |
3534 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { | |
3535 VM_Exit::block_if_vm_exited(); | |
3536 JVMWrapper("JVM_RawMonitorDestroy"); | |
3537 delete ((Mutex*) mon); | |
3538 } | |
3539 | |
3540 | |
3541 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { | |
3542 VM_Exit::block_if_vm_exited(); | |
3543 JVMWrapper("JVM_RawMonitorEnter"); | |
3544 ((Mutex*) mon)->jvm_raw_lock(); | |
3545 return 0; | |
3546 } | |
3547 | |
3548 | |
3549 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { | |
3550 VM_Exit::block_if_vm_exited(); | |
3551 JVMWrapper("JVM_RawMonitorExit"); | |
3552 ((Mutex*) mon)->jvm_raw_unlock(); | |
3553 } | |
3554 | |
3555 | |
3556 // Support for Serialization | |
3557 | |
3558 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); | |
3559 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); | |
3560 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); | |
3561 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); | |
3562 | |
3563 static IntBitsToFloatFn int_bits_to_float_fn = NULL; | |
3564 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; | |
3565 static FloatToIntBitsFn float_to_int_bits_fn = NULL; | |
3566 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; | |
3567 | |
3568 | |
3569 void initialize_converter_functions() { | |
3570 if (JDK_Version::is_gte_jdk14x_version()) { | |
3571 // These functions only exist for compatibility with 1.3.1 and earlier | |
3572 return; | |
3573 } | |
3574 | |
3575 // called from universe_post_init() | |
3576 assert( | |
3577 int_bits_to_float_fn == NULL && | |
3578 long_bits_to_double_fn == NULL && | |
3579 float_to_int_bits_fn == NULL && | |
3580 double_to_long_bits_fn == NULL , | |
3581 "initialization done twice" | |
3582 ); | |
3583 // initialize | |
3584 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); | |
3585 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); | |
3586 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); | |
3587 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); | |
3588 // verify | |
3589 assert( | |
3590 int_bits_to_float_fn != NULL && | |
3591 long_bits_to_double_fn != NULL && | |
3592 float_to_int_bits_fn != NULL && | |
3593 double_to_long_bits_fn != NULL , | |
3594 "initialization failed" | |
3595 ); | |
3596 } | |
3597 | |
3598 | |
3599 // Serialization | |
3600 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3601 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3602 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3603 | |
3604 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3605 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3606 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3607 oop o = JNIHandles::resolve(obj); | |
3608 | |
3609 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3610 THROW(vmSymbols::java_lang_NullPointerException()); | |
3611 } | |
3612 | |
3613 jsize nfids = fids->length(); | |
3614 if (nfids == 0) return; | |
3615 | |
3616 if (tcodes->length() < nfids) { | |
3617 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3618 } | |
3619 | |
3620 jsize off = 0; | |
3621 /* loop through fields, setting values */ | |
3622 for (jsize i = 0; i < nfids; i++) { | |
3623 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3624 int field_offset; | |
3625 if (fid != NULL) { | |
3626 // NULL is a legal value for fid, but retrieving the field offset | |
3627 // trigger assertion in that case | |
3628 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3629 } | |
3630 | |
3631 switch (tcodes->char_at(i)) { | |
3632 case 'Z': | |
3633 if (fid != NULL) { | |
3634 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; | |
3635 o->bool_field_put(field_offset, val); | |
3636 } | |
3637 off++; | |
3638 break; | |
3639 | |
3640 case 'B': | |
3641 if (fid != NULL) { | |
3642 o->byte_field_put(field_offset, dbuf->byte_at(off)); | |
3643 } | |
3644 off++; | |
3645 break; | |
3646 | |
3647 case 'C': | |
3648 if (fid != NULL) { | |
3649 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3650 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3651 o->char_field_put(field_offset, val); | |
3652 } | |
3653 off += 2; | |
3654 break; | |
3655 | |
3656 case 'S': | |
3657 if (fid != NULL) { | |
3658 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3659 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3660 o->short_field_put(field_offset, val); | |
3661 } | |
3662 off += 2; | |
3663 break; | |
3664 | |
3665 case 'I': | |
3666 if (fid != NULL) { | |
3667 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3668 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3669 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3670 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3671 o->int_field_put(field_offset, ival); | |
3672 } | |
3673 off += 4; | |
3674 break; | |
3675 | |
3676 case 'F': | |
3677 if (fid != NULL) { | |
3678 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3679 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3680 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3681 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3682 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); | |
3683 o->float_field_put(field_offset, fval); | |
3684 } | |
3685 off += 4; | |
3686 break; | |
3687 | |
3688 case 'J': | |
3689 if (fid != NULL) { | |
3690 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3691 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3692 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3693 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3694 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3695 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3696 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3697 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3698 o->long_field_put(field_offset, lval); | |
3699 } | |
3700 off += 8; | |
3701 break; | |
3702 | |
3703 case 'D': | |
3704 if (fid != NULL) { | |
3705 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3706 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3707 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3708 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3709 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3710 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3711 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3712 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3713 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); | |
3714 o->double_field_put(field_offset, dval); | |
3715 } | |
3716 off += 8; | |
3717 break; | |
3718 | |
3719 default: | |
3720 // Illegal typecode | |
3721 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
3722 } | |
3723 } | |
3724 JVM_END | |
3725 | |
3726 | |
3727 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3728 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3729 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3730 | |
3731 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3732 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3733 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3734 oop o = JNIHandles::resolve(obj); | |
3735 | |
3736 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3737 THROW(vmSymbols::java_lang_NullPointerException()); | |
3738 } | |
3739 | |
3740 jsize nfids = fids->length(); | |
3741 if (nfids == 0) return; | |
3742 | |
3743 if (tcodes->length() < nfids) { | |
3744 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3745 } | |
3746 | |
3747 /* loop through fields, fetching values */ | |
3748 jsize off = 0; | |
3749 for (jsize i = 0; i < nfids; i++) { | |
3750 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3751 if (fid == NULL) { | |
3752 THROW(vmSymbols::java_lang_NullPointerException()); | |
3753 } | |
3754 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3755 | |
3756 switch (tcodes->char_at(i)) { | |
3757 case 'Z': | |
3758 { | |
3759 jboolean val = o->bool_field(field_offset); | |
3760 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); | |
3761 } | |
3762 break; | |
3763 | |
3764 case 'B': | |
3765 dbuf->byte_at_put(off++, o->byte_field(field_offset)); | |
3766 break; | |
3767 | |
3768 case 'C': | |
3769 { | |
3770 jchar val = o->char_field(field_offset); | |
3771 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3772 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3773 } | |
3774 break; | |
3775 | |
3776 case 'S': | |
3777 { | |
3778 jshort val = o->short_field(field_offset); | |
3779 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3780 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3781 } | |
3782 break; | |
3783 | |
3784 case 'I': | |
3785 { | |
3786 jint val = o->int_field(field_offset); | |
3787 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3788 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3789 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3790 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3791 } | |
3792 break; | |
3793 | |
3794 case 'F': | |
3795 { | |
3796 jfloat fval = o->float_field(field_offset); | |
3797 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); | |
3798 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); | |
3799 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); | |
3800 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); | |
3801 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); | |
3802 } | |
3803 break; | |
3804 | |
3805 case 'J': | |
3806 { | |
3807 jlong val = o->long_field(field_offset); | |
3808 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); | |
3809 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); | |
3810 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); | |
3811 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); | |
3812 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3813 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3814 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3815 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3816 } | |
3817 break; | |
3818 | |
3819 case 'D': | |
3820 { | |
3821 jdouble dval = o->double_field(field_offset); | |
3822 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); | |
3823 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); | |
3824 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); | |
3825 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); | |
3826 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); | |
3827 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); | |
3828 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); | |
3829 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); | |
3830 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); | |
3831 } | |
3832 break; | |
3833 | |
3834 default: | |
3835 // Illegal typecode | |
3836 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
3837 } | |
3838 } | |
3839 JVM_END | |
3840 | |
3841 | |
3842 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// | |
3843 | |
3844 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { | |
3845 // Security Note: | |
3846 // The Java level wrapper will perform the necessary security check allowing | |
3847 // us to pass the NULL as the initiating class loader. | |
3848 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); | |
3849 KlassHandle klass_handle(THREAD, klass); | |
3850 // Check if we should initialize the class | |
3851 if (init && klass_handle->oop_is_instance()) { | |
3852 klass_handle->initialize(CHECK_NULL); | |
3853 } | |
3854 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); | |
3855 } | |
3856 | |
3857 | |
3858 // Internal SQE debugging support /////////////////////////////////////////////////////////// | |
3859 | |
3860 #ifndef PRODUCT | |
3861 | |
3862 extern "C" { | |
3863 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); | |
3864 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); | |
3865 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); | |
3866 } | |
3867 | |
3868 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) | |
3869 JVMWrapper("JVM_AccessBoolVMFlag"); | |
3870 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); | |
3871 JVM_END | |
3872 | |
3873 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) | |
3874 JVMWrapper("JVM_AccessVMIntFlag"); | |
3875 intx v; | |
3876 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); | |
3877 *value = (jint)v; | |
3878 return result; | |
3879 JVM_END | |
3880 | |
3881 | |
3882 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) | |
3883 JVMWrapper("JVM_VMBreakPoint"); | |
3884 oop the_obj = JNIHandles::resolve(obj); | |
3885 BREAKPOINT; | |
3886 JVM_END | |
3887 | |
3888 | |
3889 #endif | |
3890 | |
3891 | |
3892 //--------------------------------------------------------------------------- | |
3893 // | |
3894 // Support for old native code-based reflection (pre-JDK 1.4) | |
3895 // Disabled by default in the product build. | |
3896 // | |
3897 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION | |
3898 // | |
3899 //--------------------------------------------------------------------------- | |
3900 | |
3901 #ifdef SUPPORT_OLD_REFLECTION | |
3902 | |
3903 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which)) | |
3904 JVMWrapper("JVM_GetClassFields"); | |
3905 JvmtiVMObjectAllocEventCollector oam; | |
3906 oop mirror = JNIHandles::resolve_non_null(cls); | |
3907 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL); | |
3908 return (jobjectArray) JNIHandles::make_local(env, result); | |
3909 JVM_END | |
3910 | |
3911 | |
3912 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which)) | |
3913 JVMWrapper("JVM_GetClassMethods"); | |
3914 JvmtiVMObjectAllocEventCollector oam; | |
3915 oop mirror = JNIHandles::resolve_non_null(cls); | |
3916 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL); | |
3917 //%note jvm_r4 | |
3918 return (jobjectArray) JNIHandles::make_local(env, result); | |
3919 JVM_END | |
3920 | |
3921 | |
3922 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which)) | |
3923 JVMWrapper("JVM_GetClassConstructors"); | |
3924 JvmtiVMObjectAllocEventCollector oam; | |
3925 oop mirror = JNIHandles::resolve_non_null(cls); | |
3926 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL); | |
3927 //%note jvm_r4 | |
3928 return (jobjectArray) JNIHandles::make_local(env, result); | |
3929 JVM_END | |
3930 | |
3931 | |
3932 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which)) | |
3933 JVMWrapper("JVM_GetClassField"); | |
3934 JvmtiVMObjectAllocEventCollector oam; | |
3935 if (name == NULL) return NULL; | |
3936 Handle str (THREAD, JNIHandles::resolve_non_null(name)); | |
3937 | |
3938 const char* cstr = java_lang_String::as_utf8_string(str()); | |
3939 symbolHandle field_name = | |
3940 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); | |
3941 if (field_name.is_null()) { | |
3942 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); | |
3943 } | |
3944 | |
3945 oop mirror = JNIHandles::resolve_non_null(cls); | |
3946 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL); | |
3947 if (result == NULL) { | |
3948 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); | |
3949 } | |
3950 return JNIHandles::make_local(env, result); | |
3951 JVM_END | |
3952 | |
3953 | |
3954 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which)) | |
3955 JVMWrapper("JVM_GetClassMethod"); | |
3956 JvmtiVMObjectAllocEventCollector oam; | |
3957 if (name == NULL) { | |
3958 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
3959 } | |
3960 Handle str (THREAD, JNIHandles::resolve_non_null(name)); | |
3961 | |
3962 const char* cstr = java_lang_String::as_utf8_string(str()); | |
3963 symbolHandle method_name = | |
3964 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); | |
3965 if (method_name.is_null()) { | |
3966 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
3967 } | |
3968 | |
3969 oop mirror = JNIHandles::resolve_non_null(cls); | |
3970 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); | |
3971 oop result = Reflection::reflect_method(mirror, method_name, tarray, | |
3972 which, CHECK_NULL); | |
3973 if (result == NULL) { | |
3974 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
3975 } | |
3976 return JNIHandles::make_local(env, result); | |
3977 JVM_END | |
3978 | |
3979 | |
3980 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which)) | |
3981 JVMWrapper("JVM_GetClassConstructor"); | |
3982 JvmtiVMObjectAllocEventCollector oam; | |
3983 oop mirror = JNIHandles::resolve_non_null(cls); | |
3984 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); | |
3985 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL); | |
3986 if (result == NULL) { | |
3987 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
3988 } | |
3989 return (jobject) JNIHandles::make_local(env, result); | |
3990 JVM_END | |
3991 | |
3992 | |
3993 // Instantiation /////////////////////////////////////////////////////////////////////////////// | |
3994 | |
3995 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls)) | |
3996 JVMWrapper("JVM_NewInstance"); | |
3997 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls)); | |
3998 | |
3999 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror()); | |
4000 if (resolved_constructor == NULL) { | |
4001 klassOop k = java_lang_Class::as_klassOop(mirror()); | |
4002 // The java.lang.Class object caches a resolved constructor if all the checks | |
4003 // below were done successfully and a constructor was found. | |
4004 | |
4005 // Do class based checks | |
4006 if (java_lang_Class::is_primitive(mirror())) { | |
4007 const char* msg = ""; | |
4008 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean"; | |
4009 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character"; | |
4010 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float"; | |
4011 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double"; | |
4012 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte"; | |
4013 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short"; | |
4014 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer"; | |
4015 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long"; | |
4016 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg); | |
4017 } | |
4018 | |
4019 // Check whether we are allowed to instantiate this class | |
4020 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here | |
4021 instanceKlassHandle klass(THREAD, k); | |
4022 // Make sure class is initialized (also so all methods are rewritten) | |
4023 klass->initialize(CHECK_NULL); | |
4024 | |
4025 // Lookup default constructor | |
4026 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature()); | |
4027 if (resolved_constructor == NULL) { | |
4028 ResourceMark rm(THREAD); | |
4029 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name()); | |
4030 } | |
4031 | |
4032 // Cache result in java.lang.Class object. Does not have to be MT safe. | |
4033 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor); | |
4034 } | |
4035 | |
4036 assert(resolved_constructor != NULL, "sanity check"); | |
4037 methodHandle constructor = methodHandle(THREAD, resolved_constructor); | |
4038 | |
4039 // We have an initialized instanceKlass with a default constructor | |
4040 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
4041 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check"); | |
4042 | |
4043 // Do security check | |
4044 klassOop caller_klass = NULL; | |
4045 if (UsePrivilegedStack) { | |
4046 caller_klass = thread->security_get_caller_class(2); | |
4047 | |
4048 if (!Reflection::verify_class_access(caller_klass, klass(), false) || | |
4049 !Reflection::verify_field_access(caller_klass, | |
4050 klass(), | |
4051 klass(), | |
4052 constructor->access_flags(), | |
4053 false, | |
4054 true)) { | |
4055 ResourceMark rm(THREAD); | |
4056 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name()); | |
4057 } | |
4058 } | |
4059 | |
4060 // Allocate object and call constructor | |
4061 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); | |
4062 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL); | |
4063 | |
4064 jobject res = JNIHandles::make_local(env, receiver()); | |
4065 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4066 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver()); | |
4067 } | |
4068 return res; | |
4069 JVM_END | |
4070 | |
4071 | |
4072 // Field //////////////////////////////////////////////////////////////////////////////////////////// | |
4073 | |
4074 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj)) | |
4075 JVMWrapper("JVM_GetField"); | |
4076 JvmtiVMObjectAllocEventCollector oam; | |
4077 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4078 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4079 fieldDescriptor fd; | |
4080 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL); | |
4081 jvalue value; | |
4082 BasicType type = Reflection::field_get(&value, &fd, receiver); | |
4083 oop box = Reflection::box(&value, type, CHECK_NULL); | |
4084 return JNIHandles::make_local(env, box); | |
4085 JVM_END | |
4086 | |
4087 | |
4088 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode)) | |
4089 JVMWrapper("JVM_GetPrimitiveField"); | |
4090 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4091 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4092 fieldDescriptor fd; | |
4093 jvalue value; | |
4094 value.j = 0; | |
4095 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value)); | |
4096 BasicType type = Reflection::field_get(&value, &fd, receiver); | |
4097 BasicType wide_type = (BasicType) wCode; | |
4098 if (type != wide_type) { | |
4099 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
4100 } | |
4101 return value; | |
4102 JVM_END // should really be JVM_END, but that doesn't work for union types! | |
4103 | |
4104 | |
4105 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val)) | |
4106 JVMWrapper("JVM_SetField"); | |
4107 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4108 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4109 oop box = JNIHandles::resolve(val); | |
4110 fieldDescriptor fd; | |
4111 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); | |
4112 BasicType field_type = fd.field_type(); | |
4113 jvalue value; | |
4114 BasicType value_type; | |
4115 if (field_type == T_OBJECT || field_type == T_ARRAY) { | |
4116 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
4117 value_type = Reflection::unbox_for_regular_object(box, &value); | |
4118 Reflection::field_set(&value, &fd, receiver, field_type, CHECK); | |
4119 } else { | |
4120 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
4121 Reflection::field_set(&value, &fd, receiver, value_type, CHECK); | |
4122 } | |
4123 JVM_END | |
4124 | |
4125 | |
4126 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode)) | |
4127 JVMWrapper("JVM_SetPrimitiveField"); | |
4128 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4129 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4130 fieldDescriptor fd; | |
4131 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); | |
4132 BasicType value_type = (BasicType) vCode; | |
4133 Reflection::field_set(&v, &fd, receiver, value_type, CHECK); | |
4134 JVM_END | |
4135 | |
4136 | |
4137 // Method /////////////////////////////////////////////////////////////////////////////////////////// | |
4138 | |
4139 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) | |
4140 JVMWrapper("JVM_InvokeMethod"); | |
4141 Handle method_handle; | |
4142 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { | |
4143 method_handle = Handle(THREAD, JNIHandles::resolve(method)); | |
4144 Handle receiver(THREAD, JNIHandles::resolve(obj)); | |
4145 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4146 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); | |
4147 jobject res = JNIHandles::make_local(env, result); | |
4148 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4149 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); | |
4150 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); | |
4151 if (java_lang_Class::is_primitive(ret_type)) { | |
4152 // Only for primitive type vm allocates memory for java object. | |
4153 // See box() method. | |
4154 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4155 } | |
4156 } | |
4157 return res; | |
4158 } else { | |
4159 THROW_0(vmSymbols::java_lang_StackOverflowError()); | |
4160 } | |
4161 JVM_END | |
4162 | |
4163 | |
4164 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) | |
4165 JVMWrapper("JVM_NewInstanceFromConstructor"); | |
4166 oop constructor_mirror = JNIHandles::resolve(c); | |
4167 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4168 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); | |
4169 jobject res = JNIHandles::make_local(env, result); | |
4170 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4171 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4172 } | |
4173 return res; | |
4174 JVM_END | |
4175 | |
4176 #endif /* SUPPORT_OLD_REFLECTION */ | |
4177 | |
4178 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// | |
4179 | |
4180 JVM_LEAF(jboolean, JVM_SupportsCX8()) | |
4181 JVMWrapper("JVM_SupportsCX8"); | |
4182 return VM_Version::supports_cx8(); | |
4183 JVM_END | |
4184 | |
4185 | |
4186 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) | |
4187 JVMWrapper("JVM_CX8Field"); | |
4188 jlong res; | |
4189 oop o = JNIHandles::resolve(obj); | |
4190 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
4191 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); | |
4192 | |
4193 assert(VM_Version::supports_cx8(), "cx8 not supported"); | |
4194 res = Atomic::cmpxchg(newVal, addr, oldVal); | |
4195 | |
4196 return res == oldVal; | |
4197 JVM_END | |
4198 | |
116
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4199 // DTrace /////////////////////////////////////////////////////////////////// |
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4200 |
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|
4201 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) |
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|
4202 JVMWrapper("JVM_DTraceGetVersion"); |
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|
4203 return (jint)JVM_TRACING_DTRACE_VERSION; |
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|
4204 JVM_END |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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|
4205 |
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|
4206 JVM_ENTRY(jlong,JVM_DTraceActivate( |
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|
4207 JNIEnv* env, jint version, jstring module_name, jint providers_count, |
018d5b58dd4f
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|
4208 JVM_DTraceProvider* providers)) |
018d5b58dd4f
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diff
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|
4209 JVMWrapper("JVM_DTraceActivate"); |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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|
4210 return DTraceJSDT::activate( |
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|
4211 version, module_name, providers_count, providers, CHECK_0); |
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4212 JVM_END |
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4213 |
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4214 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) |
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4215 JVMWrapper("JVM_DTraceIsProbeEnabled"); |
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4216 return DTraceJSDT::is_probe_enabled(method); |
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4217 JVM_END |
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4218 |
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4219 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) |
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4220 JVMWrapper("JVM_DTraceDispose"); |
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4221 DTraceJSDT::dispose(handle); |
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4222 JVM_END |
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4223 |
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4224 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) |
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4225 JVMWrapper("JVM_DTraceIsSupported"); |
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4226 return DTraceJSDT::is_supported(); |
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4227 JVM_END |
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4228 |
0 | 4229 // Returns an array of all live Thread objects (VM internal JavaThreads, |
4230 // jvmti agent threads, and JNI attaching threads are skipped) | |
4231 // See CR 6404306 regarding JNI attaching threads | |
4232 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) | |
4233 ResourceMark rm(THREAD); | |
4234 ThreadsListEnumerator tle(THREAD, false, false); | |
4235 JvmtiVMObjectAllocEventCollector oam; | |
4236 | |
4237 int num_threads = tle.num_threads(); | |
4238 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL); | |
4239 objArrayHandle threads_ah(THREAD, r); | |
4240 | |
4241 for (int i = 0; i < num_threads; i++) { | |
4242 Handle h = tle.get_threadObj(i); | |
4243 threads_ah->obj_at_put(i, h()); | |
4244 } | |
4245 | |
4246 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); | |
4247 JVM_END | |
4248 | |
4249 | |
4250 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods | |
4251 // Return StackTraceElement[][], each element is the stack trace of a thread in | |
4252 // the corresponding entry in the given threads array | |
4253 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) | |
4254 JVMWrapper("JVM_DumpThreads"); | |
4255 JvmtiVMObjectAllocEventCollector oam; | |
4256 | |
4257 // Check if threads is null | |
4258 if (threads == NULL) { | |
4259 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4260 } | |
4261 | |
4262 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); | |
4263 objArrayHandle ah(THREAD, a); | |
4264 int num_threads = ah->length(); | |
4265 // check if threads is non-empty array | |
4266 if (num_threads == 0) { | |
4267 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4268 } | |
4269 | |
4270 // check if threads is not an array of objects of Thread class | |
4271 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); | |
4272 if (k != SystemDictionary::thread_klass()) { | |
4273 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4274 } | |
4275 | |
4276 ResourceMark rm(THREAD); | |
4277 | |
4278 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
4279 for (int i = 0; i < num_threads; i++) { | |
4280 oop thread_obj = ah->obj_at(i); | |
4281 instanceHandle h(THREAD, (instanceOop) thread_obj); | |
4282 thread_handle_array->append(h); | |
4283 } | |
4284 | |
4285 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); | |
4286 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); | |
4287 | |
4288 JVM_END | |
4289 | |
4290 // JVM monitoring and management support | |
4291 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) | |
4292 return Management::get_jmm_interface(version); | |
4293 JVM_END | |
4294 | |
4295 // com.sun.tools.attach.VirtualMachine agent properties support | |
4296 // | |
4297 // Initialize the agent properties with the properties maintained in the VM | |
4298 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) | |
4299 JVMWrapper("JVM_InitAgentProperties"); | |
4300 ResourceMark rm; | |
4301 | |
4302 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
4303 | |
4304 PUTPROP(props, "sun.java.command", Arguments::java_command()); | |
4305 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); | |
4306 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); | |
4307 return properties; | |
4308 JVM_END | |
4309 | |
4310 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) | |
4311 { | |
4312 JVMWrapper("JVM_GetEnclosingMethodInfo"); | |
4313 JvmtiVMObjectAllocEventCollector oam; | |
4314 | |
4315 if (ofClass == NULL) { | |
4316 return NULL; | |
4317 } | |
4318 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); | |
4319 // Special handling for primitive objects | |
4320 if (java_lang_Class::is_primitive(mirror())) { | |
4321 return NULL; | |
4322 } | |
4323 klassOop k = java_lang_Class::as_klassOop(mirror()); | |
4324 if (!Klass::cast(k)->oop_is_instance()) { | |
4325 return NULL; | |
4326 } | |
4327 instanceKlassHandle ik_h(THREAD, k); | |
4328 int encl_method_class_idx = ik_h->enclosing_method_class_index(); | |
4329 if (encl_method_class_idx == 0) { | |
4330 return NULL; | |
4331 } | |
4332 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL); | |
4333 objArrayHandle dest(THREAD, dest_o); | |
4334 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); | |
4335 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); | |
4336 int encl_method_method_idx = ik_h->enclosing_method_method_index(); | |
4337 if (encl_method_method_idx != 0) { | |
4338 symbolOop sym_o = ik_h->constants()->symbol_at( | |
4339 extract_low_short_from_int( | |
4340 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4341 symbolHandle sym(THREAD, sym_o); | |
4342 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4343 dest->obj_at_put(1, str()); | |
4344 sym_o = ik_h->constants()->symbol_at( | |
4345 extract_high_short_from_int( | |
4346 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4347 sym = symbolHandle(THREAD, sym_o); | |
4348 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4349 dest->obj_at_put(2, str()); | |
4350 } | |
4351 return (jobjectArray) JNIHandles::make_local(dest()); | |
4352 } | |
4353 JVM_END | |
4354 | |
4355 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, | |
4356 jint javaThreadState)) | |
4357 { | |
4358 // If new thread states are added in future JDK and VM versions, | |
4359 // this should check if the JDK version is compatible with thread | |
4360 // states supported by the VM. Return NULL if not compatible. | |
4361 // | |
4362 // This function must map the VM java_lang_Thread::ThreadStatus | |
4363 // to the Java thread state that the JDK supports. | |
4364 // | |
4365 | |
4366 typeArrayHandle values_h; | |
4367 switch (javaThreadState) { | |
4368 case JAVA_THREAD_STATE_NEW : { | |
4369 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4370 values_h = typeArrayHandle(THREAD, r); | |
4371 values_h->int_at_put(0, java_lang_Thread::NEW); | |
4372 break; | |
4373 } | |
4374 case JAVA_THREAD_STATE_RUNNABLE : { | |
4375 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4376 values_h = typeArrayHandle(THREAD, r); | |
4377 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); | |
4378 break; | |
4379 } | |
4380 case JAVA_THREAD_STATE_BLOCKED : { | |
4381 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4382 values_h = typeArrayHandle(THREAD, r); | |
4383 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); | |
4384 break; | |
4385 } | |
4386 case JAVA_THREAD_STATE_WAITING : { | |
4387 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); | |
4388 values_h = typeArrayHandle(THREAD, r); | |
4389 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); | |
4390 values_h->int_at_put(1, java_lang_Thread::PARKED); | |
4391 break; | |
4392 } | |
4393 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4394 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); | |
4395 values_h = typeArrayHandle(THREAD, r); | |
4396 values_h->int_at_put(0, java_lang_Thread::SLEEPING); | |
4397 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); | |
4398 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); | |
4399 break; | |
4400 } | |
4401 case JAVA_THREAD_STATE_TERMINATED : { | |
4402 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4403 values_h = typeArrayHandle(THREAD, r); | |
4404 values_h->int_at_put(0, java_lang_Thread::TERMINATED); | |
4405 break; | |
4406 } | |
4407 default: | |
4408 // Unknown state - probably incompatible JDK version | |
4409 return NULL; | |
4410 } | |
4411 | |
4412 return (jintArray) JNIHandles::make_local(env, values_h()); | |
4413 } | |
4414 JVM_END | |
4415 | |
4416 | |
4417 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, | |
4418 jint javaThreadState, | |
4419 jintArray values)) | |
4420 { | |
4421 // If new thread states are added in future JDK and VM versions, | |
4422 // this should check if the JDK version is compatible with thread | |
4423 // states supported by the VM. Return NULL if not compatible. | |
4424 // | |
4425 // This function must map the VM java_lang_Thread::ThreadStatus | |
4426 // to the Java thread state that the JDK supports. | |
4427 // | |
4428 | |
4429 ResourceMark rm; | |
4430 | |
4431 // Check if threads is null | |
4432 if (values == NULL) { | |
4433 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4434 } | |
4435 | |
4436 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); | |
4437 typeArrayHandle values_h(THREAD, v); | |
4438 | |
4439 objArrayHandle names_h; | |
4440 switch (javaThreadState) { | |
4441 case JAVA_THREAD_STATE_NEW : { | |
4442 assert(values_h->length() == 1 && | |
4443 values_h->int_at(0) == java_lang_Thread::NEW, | |
4444 "Invalid threadStatus value"); | |
4445 | |
4446 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4447 1, /* only 1 substate */ | |
4448 CHECK_NULL); | |
4449 names_h = objArrayHandle(THREAD, r); | |
4450 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); | |
4451 names_h->obj_at_put(0, name()); | |
4452 break; | |
4453 } | |
4454 case JAVA_THREAD_STATE_RUNNABLE : { | |
4455 assert(values_h->length() == 1 && | |
4456 values_h->int_at(0) == java_lang_Thread::RUNNABLE, | |
4457 "Invalid threadStatus value"); | |
4458 | |
4459 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4460 1, /* only 1 substate */ | |
4461 CHECK_NULL); | |
4462 names_h = objArrayHandle(THREAD, r); | |
4463 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); | |
4464 names_h->obj_at_put(0, name()); | |
4465 break; | |
4466 } | |
4467 case JAVA_THREAD_STATE_BLOCKED : { | |
4468 assert(values_h->length() == 1 && | |
4469 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, | |
4470 "Invalid threadStatus value"); | |
4471 | |
4472 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4473 1, /* only 1 substate */ | |
4474 CHECK_NULL); | |
4475 names_h = objArrayHandle(THREAD, r); | |
4476 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); | |
4477 names_h->obj_at_put(0, name()); | |
4478 break; | |
4479 } | |
4480 case JAVA_THREAD_STATE_WAITING : { | |
4481 assert(values_h->length() == 2 && | |
4482 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && | |
4483 values_h->int_at(1) == java_lang_Thread::PARKED, | |
4484 "Invalid threadStatus value"); | |
4485 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4486 2, /* number of substates */ | |
4487 CHECK_NULL); | |
4488 names_h = objArrayHandle(THREAD, r); | |
4489 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", | |
4490 CHECK_NULL); | |
4491 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", | |
4492 CHECK_NULL); | |
4493 names_h->obj_at_put(0, name0()); | |
4494 names_h->obj_at_put(1, name1()); | |
4495 break; | |
4496 } | |
4497 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4498 assert(values_h->length() == 3 && | |
4499 values_h->int_at(0) == java_lang_Thread::SLEEPING && | |
4500 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && | |
4501 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, | |
4502 "Invalid threadStatus value"); | |
4503 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4504 3, /* number of substates */ | |
4505 CHECK_NULL); | |
4506 names_h = objArrayHandle(THREAD, r); | |
4507 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", | |
4508 CHECK_NULL); | |
4509 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", | |
4510 CHECK_NULL); | |
4511 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", | |
4512 CHECK_NULL); | |
4513 names_h->obj_at_put(0, name0()); | |
4514 names_h->obj_at_put(1, name1()); | |
4515 names_h->obj_at_put(2, name2()); | |
4516 break; | |
4517 } | |
4518 case JAVA_THREAD_STATE_TERMINATED : { | |
4519 assert(values_h->length() == 1 && | |
4520 values_h->int_at(0) == java_lang_Thread::TERMINATED, | |
4521 "Invalid threadStatus value"); | |
4522 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4523 1, /* only 1 substate */ | |
4524 CHECK_NULL); | |
4525 names_h = objArrayHandle(THREAD, r); | |
4526 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); | |
4527 names_h->obj_at_put(0, name()); | |
4528 break; | |
4529 } | |
4530 default: | |
4531 // Unknown state - probably incompatible JDK version | |
4532 return NULL; | |
4533 } | |
4534 return (jobjectArray) JNIHandles::make_local(env, names_h()); | |
4535 } | |
4536 JVM_END | |
4537 | |
4538 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) | |
4539 { | |
4540 memset(info, 0, sizeof(info_size)); | |
4541 | |
4542 info->jvm_version = Abstract_VM_Version::jvm_version(); | |
4543 info->update_version = 0; /* 0 in HotSpot Express VM */ | |
4544 info->special_update_version = 0; /* 0 in HotSpot Express VM */ | |
4545 | |
4546 // when we add a new capability in the jvm_version_info struct, we should also | |
4547 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat | |
4548 // counter defined in runtimeService.cpp. | |
4549 info->is_attachable = AttachListener::is_attach_supported(); | |
4550 #ifdef KERNEL | |
4551 info->is_kernel_jvm = 1; // true; | |
4552 #else // KERNEL | |
4553 info->is_kernel_jvm = 0; // false; | |
4554 #endif // KERNEL | |
4555 } | |
4556 JVM_END | |
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4557 |