Mercurial > hg > truffle
annotate src/share/vm/prims/jvm.cpp @ 726:be93aad57795
6655646: dynamic languages need dynamically linked call sites
Summary: invokedynamic instruction (JSR 292 RI)
Reviewed-by: twisti, never
author | jrose |
---|---|
date | Tue, 21 Apr 2009 23:21:04 -0700 |
parents | d3676b4cb78c |
children | 6a93908f268f |
rev | line source |
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0 | 1 /* |
579 | 2 * Copyright 1997-2009 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; | |
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67 const char * trace = "explicit"; |
0 | 68 klassOop caller = NULL; |
69 JavaThread* jthread = JavaThread::current(); | |
70 if (jthread->has_last_Java_frame()) { | |
71 vframeStream vfst(jthread); | |
72 | |
73 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames | |
74 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK); | |
75 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); | |
76 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK); | |
77 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); | |
78 | |
79 methodOop last_caller = NULL; | |
80 | |
81 while (!vfst.at_end()) { | |
82 methodOop m = vfst.method(); | |
83 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::classloader_klass())&& | |
84 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && | |
85 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { | |
86 break; | |
87 } | |
88 last_caller = m; | |
89 vfst.next(); | |
90 } | |
91 // if this is called from Class.forName0 and that is called from Class.forName, | |
92 // then print the caller of Class.forName. If this is Class.loadClass, then print | |
93 // that caller, otherwise keep quiet since this should be picked up elsewhere. | |
94 bool found_it = false; | |
95 if (!vfst.at_end() && | |
96 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
97 vfst.method()->name() == vmSymbols::forName0_name()) { | |
98 vfst.next(); | |
99 if (!vfst.at_end() && | |
100 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
101 vfst.method()->name() == vmSymbols::forName_name()) { | |
102 vfst.next(); | |
103 found_it = true; | |
104 } | |
105 } else if (last_caller != NULL && | |
106 instanceKlass::cast(last_caller->method_holder())->name() == | |
107 vmSymbols::java_lang_ClassLoader() && | |
108 (last_caller->name() == vmSymbols::loadClassInternal_name() || | |
109 last_caller->name() == vmSymbols::loadClass_name())) { | |
110 found_it = true; | |
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111 } else if (!vfst.at_end()) { |
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112 if (vfst.method()->is_native()) { |
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113 // JNI call |
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114 found_it = true; |
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115 } |
0 | 116 } |
117 if (found_it && !vfst.at_end()) { | |
118 // found the caller | |
119 caller = vfst.method()->method_holder(); | |
120 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
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121 if (line_number == -1) { |
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122 // show method name if it's a native method |
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123 trace = vfst.method()->name_and_sig_as_C_string(); |
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124 } |
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125 symbolOop s = instanceKlass::cast(caller)->source_file_name(); |
0 | 126 if (s != NULL) { |
127 source_file = s->as_C_string(); | |
128 } | |
129 } | |
130 } | |
131 if (caller != NULL) { | |
132 if (to_class != caller) { | |
133 const char * from = Klass::cast(caller)->external_name(); | |
134 const char * to = Klass::cast(to_class)->external_name(); | |
135 // print in a single call to reduce interleaving between threads | |
136 if (source_file != NULL) { | |
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137 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); |
0 | 138 } else { |
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139 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); |
0 | 140 } |
141 } | |
142 } | |
143 } | |
144 | |
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145 void trace_class_resolution(klassOop to_class) { |
0 | 146 EXCEPTION_MARK; |
147 trace_class_resolution_impl(to_class, THREAD); | |
148 if (HAS_PENDING_EXCEPTION) { | |
149 CLEAR_PENDING_EXCEPTION; | |
150 } | |
151 } | |
152 | |
153 // Wrapper to trace JVM functions | |
154 | |
155 #ifdef ASSERT | |
156 class JVMTraceWrapper : public StackObj { | |
157 public: | |
158 JVMTraceWrapper(const char* format, ...) { | |
159 if (TraceJVMCalls) { | |
160 va_list ap; | |
161 va_start(ap, format); | |
162 tty->print("JVM "); | |
163 tty->vprint_cr(format, ap); | |
164 va_end(ap); | |
165 } | |
166 } | |
167 }; | |
168 | |
169 Histogram* JVMHistogram; | |
170 volatile jint JVMHistogram_lock = 0; | |
171 | |
172 class JVMHistogramElement : public HistogramElement { | |
173 public: | |
174 JVMHistogramElement(const char* name); | |
175 }; | |
176 | |
177 JVMHistogramElement::JVMHistogramElement(const char* elementName) { | |
178 _name = elementName; | |
179 uintx count = 0; | |
180 | |
181 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { | |
182 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { | |
183 count +=1; | |
184 if ( (WarnOnStalledSpinLock > 0) | |
185 && (count % WarnOnStalledSpinLock == 0)) { | |
186 warning("JVMHistogram_lock seems to be stalled"); | |
187 } | |
188 } | |
189 } | |
190 | |
191 if(JVMHistogram == NULL) | |
192 JVMHistogram = new Histogram("JVM Call Counts",100); | |
193 | |
194 JVMHistogram->add_element(this); | |
195 Atomic::dec(&JVMHistogram_lock); | |
196 } | |
197 | |
198 #define JVMCountWrapper(arg) \ | |
199 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ | |
200 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! | |
201 | |
202 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) | |
203 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) | |
204 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) | |
205 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) | |
206 #else | |
207 #define JVMWrapper(arg1) | |
208 #define JVMWrapper2(arg1, arg2) | |
209 #define JVMWrapper3(arg1, arg2, arg3) | |
210 #define JVMWrapper4(arg1, arg2, arg3, arg4) | |
211 #endif | |
212 | |
213 | |
214 // Interface version ///////////////////////////////////////////////////////////////////// | |
215 | |
216 | |
217 JVM_LEAF(jint, JVM_GetInterfaceVersion()) | |
218 return JVM_INTERFACE_VERSION; | |
219 JVM_END | |
220 | |
221 | |
222 // java.lang.System ////////////////////////////////////////////////////////////////////// | |
223 | |
224 | |
225 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) | |
226 JVMWrapper("JVM_CurrentTimeMillis"); | |
227 return os::javaTimeMillis(); | |
228 JVM_END | |
229 | |
230 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) | |
231 JVMWrapper("JVM_NanoTime"); | |
232 return os::javaTimeNanos(); | |
233 JVM_END | |
234 | |
235 | |
236 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, | |
237 jobject dst, jint dst_pos, jint length)) | |
238 JVMWrapper("JVM_ArrayCopy"); | |
239 // Check if we have null pointers | |
240 if (src == NULL || dst == NULL) { | |
241 THROW(vmSymbols::java_lang_NullPointerException()); | |
242 } | |
243 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); | |
244 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); | |
245 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); | |
246 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); | |
247 // Do copy | |
248 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); | |
249 JVM_END | |
250 | |
251 | |
252 static void set_property(Handle props, const char* key, const char* value, TRAPS) { | |
253 JavaValue r(T_OBJECT); | |
254 // public synchronized Object put(Object key, Object value); | |
255 HandleMark hm(THREAD); | |
256 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); | |
257 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); | |
258 JavaCalls::call_virtual(&r, | |
259 props, | |
260 KlassHandle(THREAD, SystemDictionary::properties_klass()), | |
261 vmSymbolHandles::put_name(), | |
262 vmSymbolHandles::object_object_object_signature(), | |
263 key_str, | |
264 value_str, | |
265 THREAD); | |
266 } | |
267 | |
268 | |
269 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); | |
270 | |
271 | |
272 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) | |
273 JVMWrapper("JVM_InitProperties"); | |
274 ResourceMark rm; | |
275 | |
276 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
277 | |
278 // System property list includes both user set via -D option and | |
279 // jvm system specific properties. | |
280 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { | |
281 PUTPROP(props, p->key(), p->value()); | |
282 } | |
283 | |
284 // Convert the -XX:MaxDirectMemorySize= command line flag | |
285 // to the sun.nio.MaxDirectMemorySize property. | |
286 // Do this after setting user properties to prevent people | |
287 // from setting the value with a -D option, as requested. | |
288 { | |
289 char as_chars[256]; | |
290 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize); | |
291 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); | |
292 } | |
293 | |
294 // JVM monitoring and management support | |
295 // Add the sun.management.compiler property for the compiler's name | |
296 { | |
297 #undef CSIZE | |
298 #if defined(_LP64) || defined(_WIN64) | |
299 #define CSIZE "64-Bit " | |
300 #else | |
301 #define CSIZE | |
302 #endif // 64bit | |
303 | |
304 #ifdef TIERED | |
305 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; | |
306 #else | |
307 #if defined(COMPILER1) | |
308 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; | |
309 #elif defined(COMPILER2) | |
310 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; | |
311 #else | |
312 const char* compiler_name = ""; | |
313 #endif // compilers | |
314 #endif // TIERED | |
315 | |
316 if (*compiler_name != '\0' && | |
317 (Arguments::mode() != Arguments::_int)) { | |
318 PUTPROP(props, "sun.management.compiler", compiler_name); | |
319 } | |
320 } | |
321 | |
322 return properties; | |
323 JVM_END | |
324 | |
325 | |
326 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// | |
327 | |
328 extern volatile jint vm_created; | |
329 | |
330 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) | |
331 if (vm_created != 0 && (code == 0)) { | |
332 // The VM is about to exit. We call back into Java to check whether finalizers should be run | |
333 Universe::run_finalizers_on_exit(); | |
334 } | |
335 before_exit(thread); | |
336 vm_exit(code); | |
337 JVM_END | |
338 | |
339 | |
340 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) | |
341 before_exit(thread); | |
342 vm_exit(code); | |
343 JVM_END | |
344 | |
345 | |
346 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) | |
347 register_on_exit_function(func); | |
348 JVM_END | |
349 | |
350 | |
351 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) | |
352 JVMWrapper("JVM_GC"); | |
353 if (!DisableExplicitGC) { | |
354 Universe::heap()->collect(GCCause::_java_lang_system_gc); | |
355 } | |
356 JVM_END | |
357 | |
358 | |
359 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) | |
360 JVMWrapper("JVM_MaxObjectInspectionAge"); | |
361 return Universe::heap()->millis_since_last_gc(); | |
362 JVM_END | |
363 | |
364 | |
365 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) | |
366 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); | |
367 JVM_END | |
368 | |
369 | |
370 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) | |
371 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); | |
372 JVM_END | |
373 | |
374 static inline jlong convert_size_t_to_jlong(size_t val) { | |
375 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). | |
376 NOT_LP64 (return (jlong)val;) | |
377 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) | |
378 } | |
379 | |
380 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) | |
381 JVMWrapper("JVM_TotalMemory"); | |
382 size_t n = Universe::heap()->capacity(); | |
383 return convert_size_t_to_jlong(n); | |
384 JVM_END | |
385 | |
386 | |
387 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) | |
388 JVMWrapper("JVM_FreeMemory"); | |
389 CollectedHeap* ch = Universe::heap(); | |
342
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390 size_t n; |
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391 { |
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392 MutexLocker x(Heap_lock); |
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393 n = ch->capacity() - ch->used(); |
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394 } |
0 | 395 return convert_size_t_to_jlong(n); |
396 JVM_END | |
397 | |
398 | |
399 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) | |
400 JVMWrapper("JVM_MaxMemory"); | |
401 size_t n = Universe::heap()->max_capacity(); | |
402 return convert_size_t_to_jlong(n); | |
403 JVM_END | |
404 | |
405 | |
406 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) | |
407 JVMWrapper("JVM_ActiveProcessorCount"); | |
408 return os::active_processor_count(); | |
409 JVM_END | |
410 | |
411 | |
412 | |
413 // java.lang.Throwable ////////////////////////////////////////////////////// | |
414 | |
415 | |
416 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) | |
417 JVMWrapper("JVM_FillInStackTrace"); | |
418 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); | |
419 java_lang_Throwable::fill_in_stack_trace(exception); | |
420 JVM_END | |
421 | |
422 | |
423 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) | |
424 JVMWrapper("JVM_PrintStackTrace"); | |
425 // Note: This is no longer used in Merlin, but we still support it for compatibility. | |
426 oop exception = JNIHandles::resolve_non_null(receiver); | |
427 oop stream = JNIHandles::resolve_non_null(printable); | |
428 java_lang_Throwable::print_stack_trace(exception, stream); | |
429 JVM_END | |
430 | |
431 | |
432 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) | |
433 JVMWrapper("JVM_GetStackTraceDepth"); | |
434 oop exception = JNIHandles::resolve(throwable); | |
435 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); | |
436 JVM_END | |
437 | |
438 | |
439 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) | |
440 JVMWrapper("JVM_GetStackTraceElement"); | |
441 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC | |
442 oop exception = JNIHandles::resolve(throwable); | |
443 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); | |
444 return JNIHandles::make_local(env, element); | |
445 JVM_END | |
446 | |
447 | |
448 // java.lang.Object /////////////////////////////////////////////// | |
449 | |
450 | |
451 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) | |
452 JVMWrapper("JVM_IHashCode"); | |
453 // as implemented in the classic virtual machine; return 0 if object is NULL | |
454 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; | |
455 JVM_END | |
456 | |
457 | |
458 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) | |
459 JVMWrapper("JVM_MonitorWait"); | |
460 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
461 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); | |
462 JavaThreadInObjectWaitState jtiows(thread, ms != 0); | |
463 if (JvmtiExport::should_post_monitor_wait()) { | |
464 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); | |
465 } | |
466 ObjectSynchronizer::wait(obj, ms, CHECK); | |
467 JVM_END | |
468 | |
469 | |
470 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) | |
471 JVMWrapper("JVM_MonitorNotify"); | |
472 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
473 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); | |
474 ObjectSynchronizer::notify(obj, CHECK); | |
475 JVM_END | |
476 | |
477 | |
478 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) | |
479 JVMWrapper("JVM_MonitorNotifyAll"); | |
480 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
481 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); | |
482 ObjectSynchronizer::notifyall(obj, CHECK); | |
483 JVM_END | |
484 | |
485 | |
486 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) | |
487 JVMWrapper("JVM_Clone"); | |
488 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
489 const KlassHandle klass (THREAD, obj->klass()); | |
490 JvmtiVMObjectAllocEventCollector oam; | |
491 | |
492 #ifdef ASSERT | |
493 // Just checking that the cloneable flag is set correct | |
494 if (obj->is_javaArray()) { | |
495 guarantee(klass->is_cloneable(), "all arrays are cloneable"); | |
496 } else { | |
497 guarantee(obj->is_instance(), "should be instanceOop"); | |
498 bool cloneable = klass->is_subtype_of(SystemDictionary::cloneable_klass()); | |
499 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); | |
500 } | |
501 #endif | |
502 | |
503 // Check if class of obj supports the Cloneable interface. | |
504 // All arrays are considered to be cloneable (See JLS 20.1.5) | |
505 if (!klass->is_cloneable()) { | |
506 ResourceMark rm(THREAD); | |
507 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); | |
508 } | |
509 | |
510 // Make shallow object copy | |
511 const int size = obj->size(); | |
512 oop new_obj = NULL; | |
513 if (obj->is_javaArray()) { | |
514 const int length = ((arrayOop)obj())->length(); | |
515 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); | |
516 } else { | |
517 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); | |
518 } | |
519 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread | |
520 // is modifying a reference field in the clonee, a non-oop-atomic copy might | |
521 // be suspended in the middle of copying the pointer and end up with parts | |
522 // of two different pointers in the field. Subsequent dereferences will crash. | |
523 // 4846409: an oop-copy of objects with long or double fields or arrays of same | |
524 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead | |
525 // of oops. We know objects are aligned on a minimum of an jlong boundary. | |
526 // The same is true of StubRoutines::object_copy and the various oop_copy | |
527 // variants, and of the code generated by the inline_native_clone intrinsic. | |
528 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); | |
529 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, | |
530 (size_t)align_object_size(size) / HeapWordsPerLong); | |
531 // Clear the header | |
532 new_obj->init_mark(); | |
533 | |
534 // Store check (mark entire object and let gc sort it out) | |
535 BarrierSet* bs = Universe::heap()->barrier_set(); | |
536 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); | |
537 bs->write_region(MemRegion((HeapWord*)new_obj, size)); | |
538 | |
539 // Caution: this involves a java upcall, so the clone should be | |
540 // "gc-robust" by this stage. | |
541 if (klass->has_finalizer()) { | |
542 assert(obj->is_instance(), "should be instanceOop"); | |
543 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); | |
544 } | |
545 | |
546 return JNIHandles::make_local(env, oop(new_obj)); | |
547 JVM_END | |
548 | |
549 // java.lang.Compiler //////////////////////////////////////////////////// | |
550 | |
551 // The initial cuts of the HotSpot VM will not support JITs, and all existing | |
552 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM | |
553 // functions are all silently ignored unless JVM warnings are printed. | |
554 | |
555 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) | |
556 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); | |
557 JVM_END | |
558 | |
559 | |
560 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) | |
561 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); | |
562 return JNI_FALSE; | |
563 JVM_END | |
564 | |
565 | |
566 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) | |
567 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); | |
568 return JNI_FALSE; | |
569 JVM_END | |
570 | |
571 | |
572 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) | |
573 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); | |
574 return JNI_FALSE; | |
575 JVM_END | |
576 | |
577 | |
578 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) | |
579 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); | |
580 return NULL; | |
581 JVM_END | |
582 | |
583 | |
584 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) | |
585 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); | |
586 JVM_END | |
587 | |
588 | |
589 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) | |
590 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); | |
591 JVM_END | |
592 | |
593 | |
594 | |
595 // Error message support ////////////////////////////////////////////////////// | |
596 | |
597 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) | |
598 JVMWrapper("JVM_GetLastErrorString"); | |
599 return hpi::lasterror(buf, len); | |
600 JVM_END | |
601 | |
602 | |
603 // java.io.File /////////////////////////////////////////////////////////////// | |
604 | |
605 JVM_LEAF(char*, JVM_NativePath(char* path)) | |
606 JVMWrapper2("JVM_NativePath (%s)", path); | |
607 return hpi::native_path(path); | |
608 JVM_END | |
609 | |
610 | |
611 // Misc. class handling /////////////////////////////////////////////////////////// | |
612 | |
613 | |
614 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) | |
615 JVMWrapper("JVM_GetCallerClass"); | |
616 klassOop k = thread->security_get_caller_class(depth); | |
617 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
618 JVM_END | |
619 | |
620 | |
621 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) | |
622 JVMWrapper("JVM_FindPrimitiveClass"); | |
623 oop mirror = NULL; | |
624 BasicType t = name2type(utf); | |
625 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { | |
626 mirror = Universe::java_mirror(t); | |
627 } | |
628 if (mirror == NULL) { | |
629 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); | |
630 } else { | |
631 return (jclass) JNIHandles::make_local(env, mirror); | |
632 } | |
633 JVM_END | |
634 | |
635 | |
636 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) | |
637 JVMWrapper("JVM_ResolveClass"); | |
638 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); | |
639 JVM_END | |
640 | |
388 | 641 // Common implementation for JVM_FindClassFromBootLoader and |
642 // JVM_FindClassFromLoader | |
643 static jclass jvm_find_class_from_class_loader(JNIEnv* env, const char* name, | |
644 jboolean init, jobject loader, | |
645 jboolean throwError, TRAPS) { | |
646 // Java libraries should ensure that name is never null... | |
647 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { | |
648 // It's impossible to create this class; the name cannot fit | |
649 // into the constant pool. | |
650 if (throwError) { | |
651 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
652 } else { | |
653 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); | |
654 } | |
655 } | |
656 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
657 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
658 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
659 Handle(), throwError, THREAD); | |
660 | |
661 if (TraceClassResolution && result != NULL) { | |
662 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); | |
663 } | |
664 return result; | |
665 } | |
666 | |
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667 // Rationale behind JVM_FindClassFromBootLoader |
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668 // a> JVM_FindClassFromClassLoader was never exported in the export tables. |
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669 // b> because of (a) java.dll has a direct dependecy on the unexported |
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670 // private symbol "_JVM_FindClassFromClassLoader@20". |
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671 // c> the launcher cannot use the private symbol as it dynamically opens |
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672 // the entry point, so if something changes, the launcher will fail |
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673 // unexpectedly at runtime, it is safest for the launcher to dlopen a |
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674 // stable exported interface. |
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675 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its |
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676 // signature to change from _JVM_FindClassFromClassLoader@20 to |
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677 // JVM_FindClassFromClassLoader and will not be backward compatible |
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678 // with older JDKs. |
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679 // Thus a public/stable exported entry point is the right solution, |
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680 // public here means public in linker semantics, and is exported only |
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681 // to the JDK, and is not intended to be a public API. |
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682 |
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683 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, |
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684 const char* name, |
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685 jboolean throwError)) |
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686 JVMWrapper3("JVM_FindClassFromBootLoader %s throw %s", name, |
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687 throwError ? "error" : "exception"); |
388 | 688 return jvm_find_class_from_class_loader(env, name, JNI_FALSE, |
689 (jobject)NULL, throwError, THREAD); | |
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690 JVM_END |
0 | 691 |
692 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, | |
693 jboolean init, jobject loader, | |
694 jboolean throwError)) | |
695 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, | |
696 throwError ? "error" : "exception"); | |
388 | 697 return jvm_find_class_from_class_loader(env, name, init, loader, |
698 throwError, THREAD); | |
0 | 699 JVM_END |
700 | |
701 | |
702 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, | |
703 jboolean init, jclass from)) | |
704 JVMWrapper2("JVM_FindClassFromClass %s", name); | |
705 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { | |
706 // It's impossible to create this class; the name cannot fit | |
707 // into the constant pool. | |
708 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
709 } | |
710 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
711 oop from_class_oop = JNIHandles::resolve(from); | |
712 klassOop from_class = (from_class_oop == NULL) | |
713 ? (klassOop)NULL | |
714 : java_lang_Class::as_klassOop(from_class_oop); | |
715 oop class_loader = NULL; | |
716 oop protection_domain = NULL; | |
717 if (from_class != NULL) { | |
718 class_loader = Klass::cast(from_class)->class_loader(); | |
719 protection_domain = Klass::cast(from_class)->protection_domain(); | |
720 } | |
721 Handle h_loader(THREAD, class_loader); | |
722 Handle h_prot (THREAD, protection_domain); | |
723 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
724 h_prot, true, thread); | |
725 | |
726 if (TraceClassResolution && result != NULL) { | |
727 // this function is generally only used for class loading during verification. | |
728 ResourceMark rm; | |
729 oop from_mirror = JNIHandles::resolve_non_null(from); | |
730 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); | |
731 const char * from_name = Klass::cast(from_class)->external_name(); | |
732 | |
733 oop mirror = JNIHandles::resolve_non_null(result); | |
734 klassOop to_class = java_lang_Class::as_klassOop(mirror); | |
735 const char * to = Klass::cast(to_class)->external_name(); | |
736 tty->print("RESOLVE %s %s (verification)\n", from_name, to); | |
737 } | |
738 | |
739 return result; | |
740 JVM_END | |
741 | |
742 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { | |
743 if (loader.is_null()) { | |
744 return; | |
745 } | |
746 | |
747 // check whether the current caller thread holds the lock or not. | |
748 // If not, increment the corresponding counter | |
749 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != | |
750 ObjectSynchronizer::owner_self) { | |
751 counter->inc(); | |
752 } | |
753 } | |
754 | |
755 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() | |
756 static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) { | |
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757 if (source == NULL) source = "__JVM_DefineClass__"; |
0 | 758 |
759 // Since exceptions can be thrown, class initialization can take place | |
760 // if name is NULL no check for class name in .class stream has to be made. | |
761 symbolHandle class_name; | |
762 if (name != NULL) { | |
763 const int str_len = (int)strlen(name); | |
764 if (str_len > symbolOopDesc::max_length()) { | |
765 // It's impossible to create this class; the name cannot fit | |
766 // into the constant pool. | |
767 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
768 } | |
769 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL); | |
770 } | |
771 | |
772 ResourceMark rm(THREAD); | |
773 ClassFileStream st((u1*) buf, len, (char *)source); | |
774 Handle class_loader (THREAD, JNIHandles::resolve(loader)); | |
775 if (UsePerfData) { | |
776 is_lock_held_by_thread(class_loader, | |
777 ClassLoader::sync_JVMDefineClassLockFreeCounter(), | |
778 THREAD); | |
779 } | |
780 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); | |
781 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, | |
782 protection_domain, &st, | |
783 CHECK_NULL); | |
784 | |
785 if (TraceClassResolution && k != NULL) { | |
786 trace_class_resolution(k); | |
787 } | |
788 | |
789 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
790 } | |
791 | |
792 | |
793 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) | |
794 JVMWrapper2("JVM_DefineClass %s", name); | |
795 | |
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796 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD); |
0 | 797 JVM_END |
798 | |
799 | |
800 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) | |
801 JVMWrapper2("JVM_DefineClassWithSource %s", name); | |
802 | |
803 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD); | |
804 JVM_END | |
805 | |
806 | |
807 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) | |
808 JVMWrapper("JVM_FindLoadedClass"); | |
809 ResourceMark rm(THREAD); | |
810 | |
811 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
812 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); | |
813 | |
814 const char* str = java_lang_String::as_utf8_string(string()); | |
815 // Sanity check, don't expect null | |
816 if (str == NULL) return NULL; | |
817 | |
818 const int str_len = (int)strlen(str); | |
819 if (str_len > symbolOopDesc::max_length()) { | |
820 // It's impossible to create this class; the name cannot fit | |
821 // into the constant pool. | |
822 return NULL; | |
823 } | |
824 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL); | |
825 | |
826 // Security Note: | |
827 // The Java level wrapper will perform the necessary security check allowing | |
828 // us to pass the NULL as the initiating class loader. | |
829 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
830 if (UsePerfData) { | |
831 is_lock_held_by_thread(h_loader, | |
832 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), | |
833 THREAD); | |
834 } | |
835 | |
836 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, | |
837 h_loader, | |
838 Handle(), | |
839 CHECK_NULL); | |
840 | |
841 return (k == NULL) ? NULL : | |
842 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
843 JVM_END | |
844 | |
845 | |
846 // Reflection support ////////////////////////////////////////////////////////////////////////////// | |
847 | |
848 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) | |
849 assert (cls != NULL, "illegal class"); | |
850 JVMWrapper("JVM_GetClassName"); | |
851 JvmtiVMObjectAllocEventCollector oam; | |
852 ResourceMark rm(THREAD); | |
853 const char* name; | |
854 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
855 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); | |
856 } else { | |
857 // Consider caching interned string in Klass | |
858 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
859 assert(k->is_klass(), "just checking"); | |
860 name = Klass::cast(k)->external_name(); | |
861 } | |
862 oop result = StringTable::intern((char*) name, CHECK_NULL); | |
863 return (jstring) JNIHandles::make_local(env, result); | |
864 JVM_END | |
865 | |
866 | |
867 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) | |
868 JVMWrapper("JVM_GetClassInterfaces"); | |
869 JvmtiVMObjectAllocEventCollector oam; | |
870 oop mirror = JNIHandles::resolve_non_null(cls); | |
871 | |
872 // Special handling for primitive objects | |
873 if (java_lang_Class::is_primitive(mirror)) { | |
874 // Primitive objects does not have any interfaces | |
875 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); | |
876 return (jobjectArray) JNIHandles::make_local(env, r); | |
877 } | |
878 | |
879 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); | |
880 // Figure size of result array | |
881 int size; | |
882 if (klass->oop_is_instance()) { | |
883 size = instanceKlass::cast(klass())->local_interfaces()->length(); | |
884 } else { | |
885 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); | |
886 size = 2; | |
887 } | |
888 | |
889 // Allocate result array | |
890 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL); | |
891 objArrayHandle result (THREAD, r); | |
892 // Fill in result | |
893 if (klass->oop_is_instance()) { | |
894 // Regular instance klass, fill in all local interfaces | |
895 for (int index = 0; index < size; index++) { | |
896 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); | |
897 result->obj_at_put(index, Klass::cast(k)->java_mirror()); | |
898 } | |
899 } else { | |
900 // All arrays implement java.lang.Cloneable and java.io.Serializable | |
901 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror()); | |
902 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror()); | |
903 } | |
904 return (jobjectArray) JNIHandles::make_local(env, result()); | |
905 JVM_END | |
906 | |
907 | |
908 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) | |
909 JVMWrapper("JVM_GetClassLoader"); | |
910 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
911 return NULL; | |
912 } | |
913 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
914 oop loader = Klass::cast(k)->class_loader(); | |
915 return JNIHandles::make_local(env, loader); | |
916 JVM_END | |
917 | |
918 | |
919 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) | |
920 JVMWrapper("JVM_IsInterface"); | |
921 oop mirror = JNIHandles::resolve_non_null(cls); | |
922 if (java_lang_Class::is_primitive(mirror)) { | |
923 return JNI_FALSE; | |
924 } | |
925 klassOop k = java_lang_Class::as_klassOop(mirror); | |
926 jboolean result = Klass::cast(k)->is_interface(); | |
927 assert(!result || Klass::cast(k)->oop_is_instance(), | |
928 "all interfaces are instance types"); | |
929 // The compiler intrinsic for isInterface tests the | |
930 // Klass::_access_flags bits in the same way. | |
931 return result; | |
932 JVM_END | |
933 | |
934 | |
935 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) | |
936 JVMWrapper("JVM_GetClassSigners"); | |
937 JvmtiVMObjectAllocEventCollector oam; | |
938 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
939 // There are no signers for primitive types | |
940 return NULL; | |
941 } | |
942 | |
943 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
944 objArrayOop signers = NULL; | |
945 if (Klass::cast(k)->oop_is_instance()) { | |
946 signers = instanceKlass::cast(k)->signers(); | |
947 } | |
948 | |
949 // If there are no signers set in the class, or if the class | |
950 // is an array, return NULL. | |
951 if (signers == NULL) return NULL; | |
952 | |
953 // copy of the signers array | |
954 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); | |
955 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); | |
956 for (int index = 0; index < signers->length(); index++) { | |
957 signers_copy->obj_at_put(index, signers->obj_at(index)); | |
958 } | |
959 | |
960 // return the copy | |
961 return (jobjectArray) JNIHandles::make_local(env, signers_copy); | |
962 JVM_END | |
963 | |
964 | |
965 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) | |
966 JVMWrapper("JVM_SetClassSigners"); | |
967 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
968 // This call is ignored for primitive types and arrays. | |
969 // Signers are only set once, ClassLoader.java, and thus shouldn't | |
970 // be called with an array. Only the bootstrap loader creates arrays. | |
971 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
972 if (Klass::cast(k)->oop_is_instance()) { | |
973 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); | |
974 } | |
975 } | |
976 JVM_END | |
977 | |
978 | |
979 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) | |
980 JVMWrapper("JVM_GetProtectionDomain"); | |
981 if (JNIHandles::resolve(cls) == NULL) { | |
982 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
983 } | |
984 | |
985 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
986 // Primitive types does not have a protection domain. | |
987 return NULL; | |
988 } | |
989 | |
990 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
991 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); | |
992 JVM_END | |
993 | |
994 | |
995 // Obsolete since 1.2 (Class.setProtectionDomain removed), although | |
996 // still defined in core libraries as of 1.5. | |
997 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) | |
998 JVMWrapper("JVM_SetProtectionDomain"); | |
999 if (JNIHandles::resolve(cls) == NULL) { | |
1000 THROW(vmSymbols::java_lang_NullPointerException()); | |
1001 } | |
1002 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1003 // Call is ignored for primitive types | |
1004 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1005 | |
1006 // cls won't be an array, as this called only from ClassLoader.defineClass | |
1007 if (Klass::cast(k)->oop_is_instance()) { | |
1008 oop pd = JNIHandles::resolve(protection_domain); | |
1009 assert(pd == NULL || pd->is_oop(), "just checking"); | |
1010 instanceKlass::cast(k)->set_protection_domain(pd); | |
1011 } | |
1012 } | |
1013 JVM_END | |
1014 | |
1015 | |
1016 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) | |
1017 JVMWrapper("JVM_DoPrivileged"); | |
1018 | |
1019 if (action == NULL) { | |
1020 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); | |
1021 } | |
1022 | |
1023 // Stack allocated list of privileged stack elements | |
1024 PrivilegedElement pi; | |
1025 | |
1026 // Check that action object understands "Object run()" | |
1027 Handle object (THREAD, JNIHandles::resolve(action)); | |
1028 | |
1029 // get run() method | |
1030 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( | |
1031 vmSymbols::run_method_name(), | |
1032 vmSymbols::void_object_signature()); | |
1033 methodHandle m (THREAD, m_oop); | |
1034 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { | |
1035 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); | |
1036 } | |
1037 | |
1038 // Compute the frame initiating the do privileged operation and setup the privileged stack | |
1039 vframeStream vfst(thread); | |
1040 vfst.security_get_caller_frame(1); | |
1041 | |
1042 if (!vfst.at_end()) { | |
1043 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); | |
1044 thread->set_privileged_stack_top(&pi); | |
1045 } | |
1046 | |
1047 | |
1048 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type | |
1049 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction | |
1050 Handle pending_exception; | |
1051 JavaValue result(T_OBJECT); | |
1052 JavaCallArguments args(object); | |
1053 JavaCalls::call(&result, m, &args, THREAD); | |
1054 | |
1055 // done with action, remove ourselves from the list | |
1056 if (!vfst.at_end()) { | |
1057 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); | |
1058 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); | |
1059 } | |
1060 | |
1061 if (HAS_PENDING_EXCEPTION) { | |
1062 pending_exception = Handle(THREAD, PENDING_EXCEPTION); | |
1063 CLEAR_PENDING_EXCEPTION; | |
1064 | |
1065 if ( pending_exception->is_a(SystemDictionary::exception_klass()) && | |
1066 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) { | |
1067 // Throw a java.security.PrivilegedActionException(Exception e) exception | |
1068 JavaCallArguments args(pending_exception); | |
1069 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(), | |
1070 vmSymbolHandles::exception_void_signature(), | |
1071 &args); | |
1072 } | |
1073 } | |
1074 | |
1075 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); | |
1076 return JNIHandles::make_local(env, (oop) result.get_jobject()); | |
1077 JVM_END | |
1078 | |
1079 | |
1080 // Returns the inherited_access_control_context field of the running thread. | |
1081 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) | |
1082 JVMWrapper("JVM_GetInheritedAccessControlContext"); | |
1083 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); | |
1084 return JNIHandles::make_local(env, result); | |
1085 JVM_END | |
1086 | |
1087 class RegisterArrayForGC { | |
1088 private: | |
1089 JavaThread *_thread; | |
1090 public: | |
1091 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { | |
1092 _thread = thread; | |
1093 _thread->register_array_for_gc(array); | |
1094 } | |
1095 | |
1096 ~RegisterArrayForGC() { | |
1097 _thread->register_array_for_gc(NULL); | |
1098 } | |
1099 }; | |
1100 | |
1101 | |
1102 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) | |
1103 JVMWrapper("JVM_GetStackAccessControlContext"); | |
1104 if (!UsePrivilegedStack) return NULL; | |
1105 | |
1106 ResourceMark rm(THREAD); | |
1107 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); | |
1108 JvmtiVMObjectAllocEventCollector oam; | |
1109 | |
1110 // count the protection domains on the execution stack. We collapse | |
1111 // duplicate consecutive protection domains into a single one, as | |
1112 // well as stopping when we hit a privileged frame. | |
1113 | |
1114 // Use vframeStream to iterate through Java frames | |
1115 vframeStream vfst(thread); | |
1116 | |
1117 oop previous_protection_domain = NULL; | |
1118 Handle privileged_context(thread, NULL); | |
1119 bool is_privileged = false; | |
1120 oop protection_domain = NULL; | |
1121 | |
1122 for(; !vfst.at_end(); vfst.next()) { | |
1123 // get method of frame | |
1124 methodOop method = vfst.method(); | |
1125 intptr_t* frame_id = vfst.frame_id(); | |
1126 | |
1127 // check the privileged frames to see if we have a match | |
1128 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { | |
1129 // this frame is privileged | |
1130 is_privileged = true; | |
1131 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); | |
1132 protection_domain = thread->privileged_stack_top()->protection_domain(); | |
1133 } else { | |
1134 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); | |
1135 } | |
1136 | |
1137 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { | |
1138 local_array->push(protection_domain); | |
1139 previous_protection_domain = protection_domain; | |
1140 } | |
1141 | |
1142 if (is_privileged) break; | |
1143 } | |
1144 | |
1145 | |
1146 // either all the domains on the stack were system domains, or | |
1147 // we had a privileged system domain | |
1148 if (local_array->is_empty()) { | |
1149 if (is_privileged && privileged_context.is_null()) return NULL; | |
1150 | |
1151 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); | |
1152 return JNIHandles::make_local(env, result); | |
1153 } | |
1154 | |
1155 // the resource area must be registered in case of a gc | |
1156 RegisterArrayForGC ragc(thread, local_array); | |
1157 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(), | |
1158 local_array->length(), CHECK_NULL); | |
1159 objArrayHandle h_context(thread, context); | |
1160 for (int index = 0; index < local_array->length(); index++) { | |
1161 h_context->obj_at_put(index, local_array->at(index)); | |
1162 } | |
1163 | |
1164 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); | |
1165 | |
1166 return JNIHandles::make_local(env, result); | |
1167 JVM_END | |
1168 | |
1169 | |
1170 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) | |
1171 JVMWrapper("JVM_IsArrayClass"); | |
1172 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1173 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; | |
1174 JVM_END | |
1175 | |
1176 | |
1177 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) | |
1178 JVMWrapper("JVM_IsPrimitiveClass"); | |
1179 oop mirror = JNIHandles::resolve_non_null(cls); | |
1180 return (jboolean) java_lang_Class::is_primitive(mirror); | |
1181 JVM_END | |
1182 | |
1183 | |
1184 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) | |
1185 JVMWrapper("JVM_GetComponentType"); | |
1186 oop mirror = JNIHandles::resolve_non_null(cls); | |
1187 oop result = Reflection::array_component_type(mirror, CHECK_NULL); | |
1188 return (jclass) JNIHandles::make_local(env, result); | |
1189 JVM_END | |
1190 | |
1191 | |
1192 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) | |
1193 JVMWrapper("JVM_GetClassModifiers"); | |
1194 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1195 // Primitive type | |
1196 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1197 } | |
1198 | |
1199 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1200 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); | |
1201 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); | |
1202 return k->modifier_flags(); | |
1203 JVM_END | |
1204 | |
1205 | |
1206 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// | |
1207 | |
1208 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) | |
1209 const int inner_class_info_index = 0; | |
1210 const int outer_class_info_index = 1; | |
1211 | |
1212 JvmtiVMObjectAllocEventCollector oam; | |
1213 // ofClass is a reference to a java_lang_Class object. The mirror object | |
1214 // of an instanceKlass | |
1215 | |
1216 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1217 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1218 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); | |
1219 return (jobjectArray)JNIHandles::make_local(env, result); | |
1220 } | |
1221 | |
1222 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1223 | |
1224 if (k->inner_classes()->length() == 0) { | |
1225 // Neither an inner nor outer class | |
1226 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); | |
1227 return (jobjectArray)JNIHandles::make_local(env, result); | |
1228 } | |
1229 | |
1230 // find inner class info | |
1231 typeArrayHandle icls(thread, k->inner_classes()); | |
1232 constantPoolHandle cp(thread, k->constants()); | |
1233 int length = icls->length(); | |
1234 | |
1235 // Allocate temp. result array | |
1236 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL); | |
1237 objArrayHandle result (THREAD, r); | |
1238 int members = 0; | |
1239 | |
1240 for(int i = 0; i < length; i += 4) { | |
1241 int ioff = icls->ushort_at(i + inner_class_info_index); | |
1242 int ooff = icls->ushort_at(i + outer_class_info_index); | |
1243 | |
1244 if (ioff != 0 && ooff != 0) { | |
1245 // Check to see if the name matches the class we're looking for | |
1246 // before attempting to find the class. | |
1247 if (cp->klass_name_at_matches(k, ooff)) { | |
1248 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); | |
1249 if (outer_klass == k()) { | |
1250 klassOop ik = cp->klass_at(ioff, CHECK_NULL); | |
1251 instanceKlassHandle inner_klass (THREAD, ik); | |
1252 | |
1253 // Throws an exception if outer klass has not declared k as | |
1254 // an inner klass | |
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1255 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); |
0 | 1256 |
1257 result->obj_at_put(members, inner_klass->java_mirror()); | |
1258 members++; | |
1259 } | |
1260 } | |
1261 } | |
1262 } | |
1263 | |
1264 if (members != length) { | |
1265 // Return array of right length | |
1266 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL); | |
1267 for(int i = 0; i < members; i++) { | |
1268 res->obj_at_put(i, result->obj_at(i)); | |
1269 } | |
1270 return (jobjectArray)JNIHandles::make_local(env, res); | |
1271 } | |
1272 | |
1273 return (jobjectArray)JNIHandles::make_local(env, result()); | |
1274 JVM_END | |
1275 | |
1276 | |
1277 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) | |
665
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1278 { |
0 | 1279 // ofClass is a reference to a java_lang_Class object. |
1280 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1281 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1282 return NULL; | |
1283 } | |
1284 | |
665
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1285 symbolOop simple_name = NULL; |
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1286 klassOop outer_klass |
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1287 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)) |
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1288 )->compute_enclosing_class(simple_name, CHECK_NULL); |
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1289 if (outer_klass == NULL) return NULL; // already a top-level class |
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1290 if (simple_name == NULL) return NULL; // an anonymous class (inside a method) |
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1291 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror()); |
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1292 } |
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1293 JVM_END |
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1294 |
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1295 // should be in instanceKlass.cpp, but is here for historical reasons |
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1296 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, |
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1297 symbolOop& simple_name_result, TRAPS) { |
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1298 Thread* thread = THREAD; |
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1299 const int inner_class_info_index = inner_class_inner_class_info_offset; |
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1300 const int outer_class_info_index = inner_class_outer_class_info_offset; |
0 | 1301 |
1302 if (k->inner_classes()->length() == 0) { | |
1303 // No inner class info => no declaring class | |
1304 return NULL; | |
1305 } | |
1306 | |
1307 typeArrayHandle i_icls(thread, k->inner_classes()); | |
1308 constantPoolHandle i_cp(thread, k->constants()); | |
1309 int i_length = i_icls->length(); | |
1310 | |
1311 bool found = false; | |
1312 klassOop ok; | |
1313 instanceKlassHandle outer_klass; | |
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1314 bool inner_is_member = false; |
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1315 int simple_name_index = 0; |
0 | 1316 |
1317 // Find inner_klass attribute | |
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1318 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) { |
0 | 1319 int ioff = i_icls->ushort_at(i + inner_class_info_index); |
1320 int ooff = i_icls->ushort_at(i + outer_class_info_index); | |
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1321 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset); |
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1322 if (ioff != 0) { |
0 | 1323 // Check to see if the name matches the class we're looking for |
1324 // before attempting to find the class. | |
1325 if (i_cp->klass_name_at_matches(k, ioff)) { | |
1326 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); | |
665
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1327 found = (k() == inner_klass); |
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1328 if (found && ooff != 0) { |
0 | 1329 ok = i_cp->klass_at(ooff, CHECK_NULL); |
1330 outer_klass = instanceKlassHandle(thread, ok); | |
665
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1331 simple_name_index = noff; |
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1332 inner_is_member = true; |
0 | 1333 } |
1334 } | |
1335 } | |
1336 } | |
1337 | |
665
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1338 if (found && outer_klass.is_null()) { |
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1339 // It may be anonymous; try for that. |
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1340 int encl_method_class_idx = k->enclosing_method_class_index(); |
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1341 if (encl_method_class_idx != 0) { |
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1342 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); |
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1343 outer_klass = instanceKlassHandle(thread, ok); |
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1344 inner_is_member = false; |
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1345 } |
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1346 } |
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1347 |
0 | 1348 // If no inner class attribute found for this class. |
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1349 if (outer_klass.is_null()) return NULL; |
0 | 1350 |
1351 // Throws an exception if outer klass has not declared k as an inner klass | |
665
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1352 // We need evidence that each klass knows about the other, or else |
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1353 // the system could allow a spoof of an inner class to gain access rights. |
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1354 Reflection::check_for_inner_class(outer_klass, k, inner_is_member, CHECK_NULL); |
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1355 |
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1356 simple_name_result = (inner_is_member ? i_cp->symbol_at(simple_name_index) : symbolOop(NULL)); |
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1357 return outer_klass(); |
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1358 } |
0 | 1359 |
1360 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) | |
1361 assert (cls != NULL, "illegal class"); | |
1362 JVMWrapper("JVM_GetClassSignature"); | |
1363 JvmtiVMObjectAllocEventCollector oam; | |
1364 ResourceMark rm(THREAD); | |
1365 // Return null for arrays and primatives | |
1366 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1367 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1368 if (Klass::cast(k)->oop_is_instance()) { | |
1369 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature()); | |
1370 if (sym.is_null()) return NULL; | |
1371 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
1372 return (jstring) JNIHandles::make_local(env, str()); | |
1373 } | |
1374 } | |
1375 return NULL; | |
1376 JVM_END | |
1377 | |
1378 | |
1379 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) | |
1380 assert (cls != NULL, "illegal class"); | |
1381 JVMWrapper("JVM_GetClassAnnotations"); | |
1382 ResourceMark rm(THREAD); | |
1383 // Return null for arrays and primitives | |
1384 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1385 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1386 if (Klass::cast(k)->oop_is_instance()) { | |
1387 return (jbyteArray) JNIHandles::make_local(env, | |
1388 instanceKlass::cast(k)->class_annotations()); | |
1389 } | |
1390 } | |
1391 return NULL; | |
1392 JVM_END | |
1393 | |
1394 | |
1395 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) | |
1396 assert(field != NULL, "illegal field"); | |
1397 JVMWrapper("JVM_GetFieldAnnotations"); | |
1398 | |
1399 // some of this code was adapted from from jni_FromReflectedField | |
1400 | |
1401 // field is a handle to a java.lang.reflect.Field object | |
1402 oop reflected = JNIHandles::resolve_non_null(field); | |
1403 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
1404 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1405 int slot = java_lang_reflect_Field::slot(reflected); | |
1406 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
1407 | |
1408 fieldDescriptor fd; | |
1409 KlassHandle kh(THREAD, k); | |
1410 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot); | |
1411 | |
1412 if (modifiers & JVM_ACC_STATIC) { | |
1413 // for static fields we only look in the current class | |
1414 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, | |
1415 true, &fd)) { | |
1416 assert(false, "cannot find static field"); | |
1417 return NULL; // robustness | |
1418 } | |
1419 } else { | |
1420 // for instance fields we start with the current class and work | |
1421 // our way up through the superclass chain | |
1422 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, | |
1423 &fd)) { | |
1424 assert(false, "cannot find instance field"); | |
1425 return NULL; // robustness | |
1426 } | |
1427 } | |
1428 | |
1429 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); | |
1430 JVM_END | |
1431 | |
1432 | |
1433 static methodOop jvm_get_method_common(jobject method, TRAPS) { | |
1434 // some of this code was adapted from from jni_FromReflectedMethod | |
1435 | |
1436 oop reflected = JNIHandles::resolve_non_null(method); | |
1437 oop mirror = NULL; | |
1438 int slot = 0; | |
1439 | |
1440 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) { | |
1441 mirror = java_lang_reflect_Constructor::clazz(reflected); | |
1442 slot = java_lang_reflect_Constructor::slot(reflected); | |
1443 } else { | |
1444 assert(reflected->klass() == SystemDictionary::reflect_method_klass(), | |
1445 "wrong type"); | |
1446 mirror = java_lang_reflect_Method::clazz(reflected); | |
1447 slot = java_lang_reflect_Method::slot(reflected); | |
1448 } | |
1449 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1450 | |
1451 KlassHandle kh(THREAD, k); | |
1452 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); | |
1453 if (m == NULL) { | |
1454 assert(false, "cannot find method"); | |
1455 return NULL; // robustness | |
1456 } | |
1457 | |
1458 return m; | |
1459 } | |
1460 | |
1461 | |
1462 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) | |
1463 JVMWrapper("JVM_GetMethodAnnotations"); | |
1464 | |
1465 // method is a handle to a java.lang.reflect.Method object | |
1466 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1467 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); | |
1468 JVM_END | |
1469 | |
1470 | |
1471 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) | |
1472 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); | |
1473 | |
1474 // method is a handle to a java.lang.reflect.Method object | |
1475 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1476 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); | |
1477 JVM_END | |
1478 | |
1479 | |
1480 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) | |
1481 JVMWrapper("JVM_GetMethodParameterAnnotations"); | |
1482 | |
1483 // method is a handle to a java.lang.reflect.Method object | |
1484 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1485 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); | |
1486 JVM_END | |
1487 | |
1488 | |
1489 // New (JDK 1.4) reflection implementation ///////////////////////////////////// | |
1490 | |
1491 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1492 { | |
1493 JVMWrapper("JVM_GetClassDeclaredFields"); | |
1494 JvmtiVMObjectAllocEventCollector oam; | |
1495 | |
1496 // Exclude primitive types and array types | |
1497 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1498 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1499 // Return empty array | |
1500 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL); | |
1501 return (jobjectArray) JNIHandles::make_local(env, res); | |
1502 } | |
1503 | |
1504 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1505 constantPoolHandle cp(THREAD, k->constants()); | |
1506 | |
1507 // Ensure class is linked | |
1508 k->link_class(CHECK_NULL); | |
1509 | |
1510 typeArrayHandle fields(THREAD, k->fields()); | |
1511 int fields_len = fields->length(); | |
1512 | |
1513 // 4496456 We need to filter out java.lang.Throwable.backtrace | |
1514 bool skip_backtrace = false; | |
1515 | |
1516 // Allocate result | |
1517 int num_fields; | |
1518 | |
1519 if (publicOnly) { | |
1520 num_fields = 0; | |
1521 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) { | |
1522 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
1523 if (mods & JVM_ACC_PUBLIC) ++num_fields; | |
1524 } | |
1525 } else { | |
1526 num_fields = fields_len / instanceKlass::next_offset; | |
1527 | |
1528 if (k() == SystemDictionary::throwable_klass()) { | |
1529 num_fields--; | |
1530 skip_backtrace = true; | |
1531 } | |
1532 } | |
1533 | |
1534 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL); | |
1535 objArrayHandle result (THREAD, r); | |
1536 | |
1537 int out_idx = 0; | |
1538 fieldDescriptor fd; | |
1539 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) { | |
1540 if (skip_backtrace) { | |
1541 // 4496456 skip java.lang.Throwable.backtrace | |
1542 int offset = k->offset_from_fields(i); | |
1543 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; | |
1544 } | |
1545 | |
1546 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
1547 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) { | |
1548 fd.initialize(k(), i); | |
1549 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); | |
1550 result->obj_at_put(out_idx, field); | |
1551 ++out_idx; | |
1552 } | |
1553 } | |
1554 assert(out_idx == num_fields, "just checking"); | |
1555 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1556 } | |
1557 JVM_END | |
1558 | |
1559 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1560 { | |
1561 JVMWrapper("JVM_GetClassDeclaredMethods"); | |
1562 JvmtiVMObjectAllocEventCollector oam; | |
1563 | |
1564 // Exclude primitive types and array types | |
1565 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1566 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1567 // Return empty array | |
1568 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL); | |
1569 return (jobjectArray) JNIHandles::make_local(env, res); | |
1570 } | |
1571 | |
1572 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1573 | |
1574 // Ensure class is linked | |
1575 k->link_class(CHECK_NULL); | |
1576 | |
1577 objArrayHandle methods (THREAD, k->methods()); | |
1578 int methods_length = methods->length(); | |
1579 int num_methods = 0; | |
1580 | |
1581 int i; | |
1582 for (i = 0; i < methods_length; i++) { | |
1583 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1584 if (!method->is_initializer()) { | |
1585 if (!publicOnly || method->is_public()) { | |
1586 ++num_methods; | |
1587 } | |
1588 } | |
1589 } | |
1590 | |
1591 // Allocate result | |
1592 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL); | |
1593 objArrayHandle result (THREAD, r); | |
1594 | |
1595 int out_idx = 0; | |
1596 for (i = 0; i < methods_length; i++) { | |
1597 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1598 if (!method->is_initializer()) { | |
1599 if (!publicOnly || method->is_public()) { | |
1600 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); | |
1601 result->obj_at_put(out_idx, m); | |
1602 ++out_idx; | |
1603 } | |
1604 } | |
1605 } | |
1606 assert(out_idx == num_methods, "just checking"); | |
1607 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1608 } | |
1609 JVM_END | |
1610 | |
1611 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1612 { | |
1613 JVMWrapper("JVM_GetClassDeclaredConstructors"); | |
1614 JvmtiVMObjectAllocEventCollector oam; | |
1615 | |
1616 // Exclude primitive types and array types | |
1617 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1618 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1619 // Return empty array | |
1620 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL); | |
1621 return (jobjectArray) JNIHandles::make_local(env, res); | |
1622 } | |
1623 | |
1624 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1625 | |
1626 // Ensure class is linked | |
1627 k->link_class(CHECK_NULL); | |
1628 | |
1629 objArrayHandle methods (THREAD, k->methods()); | |
1630 int methods_length = methods->length(); | |
1631 int num_constructors = 0; | |
1632 | |
1633 int i; | |
1634 for (i = 0; i < methods_length; i++) { | |
1635 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1636 if (method->is_initializer() && !method->is_static()) { | |
1637 if (!publicOnly || method->is_public()) { | |
1638 ++num_constructors; | |
1639 } | |
1640 } | |
1641 } | |
1642 | |
1643 // Allocate result | |
1644 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL); | |
1645 objArrayHandle result(THREAD, r); | |
1646 | |
1647 int out_idx = 0; | |
1648 for (i = 0; i < methods_length; i++) { | |
1649 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1650 if (method->is_initializer() && !method->is_static()) { | |
1651 if (!publicOnly || method->is_public()) { | |
1652 oop m = Reflection::new_constructor(method, CHECK_NULL); | |
1653 result->obj_at_put(out_idx, m); | |
1654 ++out_idx; | |
1655 } | |
1656 } | |
1657 } | |
1658 assert(out_idx == num_constructors, "just checking"); | |
1659 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1660 } | |
1661 JVM_END | |
1662 | |
1663 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) | |
1664 { | |
1665 JVMWrapper("JVM_GetClassAccessFlags"); | |
1666 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1667 // Primitive type | |
1668 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1669 } | |
1670 | |
1671 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1672 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; | |
1673 } | |
1674 JVM_END | |
1675 | |
1676 | |
1677 // Constant pool access ////////////////////////////////////////////////////////// | |
1678 | |
1679 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) | |
1680 { | |
1681 JVMWrapper("JVM_GetClassConstantPool"); | |
1682 JvmtiVMObjectAllocEventCollector oam; | |
1683 | |
1684 // Return null for primitives and arrays | |
1685 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1686 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1687 if (Klass::cast(k)->oop_is_instance()) { | |
1688 instanceKlassHandle k_h(THREAD, k); | |
1689 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); | |
1690 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); | |
1691 return JNIHandles::make_local(jcp()); | |
1692 } | |
1693 } | |
1694 return NULL; | |
1695 } | |
1696 JVM_END | |
1697 | |
1698 | |
1699 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) | |
1700 { | |
1701 JVMWrapper("JVM_ConstantPoolGetSize"); | |
1702 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1703 return cp->length(); | |
1704 } | |
1705 JVM_END | |
1706 | |
1707 | |
1708 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { | |
1709 if (!cp->is_within_bounds(index)) { | |
1710 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); | |
1711 } | |
1712 } | |
1713 | |
1714 | |
1715 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1716 { | |
1717 JVMWrapper("JVM_ConstantPoolGetClassAt"); | |
1718 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1719 bounds_check(cp, index, CHECK_NULL); | |
1720 constantTag tag = cp->tag_at(index); | |
1721 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1722 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1723 } | |
1724 klassOop k = cp->klass_at(index, CHECK_NULL); | |
1725 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); | |
1726 } | |
1727 JVM_END | |
1728 | |
1729 | |
1730 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1731 { | |
1732 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); | |
1733 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1734 bounds_check(cp, index, CHECK_NULL); | |
1735 constantTag tag = cp->tag_at(index); | |
1736 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1737 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1738 } | |
1739 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); | |
1740 if (k == NULL) return NULL; | |
1741 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); | |
1742 } | |
1743 JVM_END | |
1744 | |
1745 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1746 constantTag tag = cp->tag_at(index); | |
1747 if (!tag.is_method() && !tag.is_interface_method()) { | |
1748 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1749 } | |
1750 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1751 klassOop k_o; | |
1752 if (force_resolution) { | |
1753 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1754 } else { | |
1755 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1756 if (k_o == NULL) return NULL; | |
1757 } | |
1758 instanceKlassHandle k(THREAD, k_o); | |
1759 symbolOop name = cp->uncached_name_ref_at(index); | |
1760 symbolOop sig = cp->uncached_signature_ref_at(index); | |
1761 methodHandle m (THREAD, k->find_method(name, sig)); | |
1762 if (m.is_null()) { | |
1763 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); | |
1764 } | |
1765 oop method; | |
1766 if (!m->is_initializer() || m->is_static()) { | |
1767 method = Reflection::new_method(m, true, true, CHECK_NULL); | |
1768 } else { | |
1769 method = Reflection::new_constructor(m, CHECK_NULL); | |
1770 } | |
1771 return JNIHandles::make_local(method); | |
1772 } | |
1773 | |
1774 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1775 { | |
1776 JVMWrapper("JVM_ConstantPoolGetMethodAt"); | |
1777 JvmtiVMObjectAllocEventCollector oam; | |
1778 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1779 bounds_check(cp, index, CHECK_NULL); | |
1780 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); | |
1781 return res; | |
1782 } | |
1783 JVM_END | |
1784 | |
1785 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1786 { | |
1787 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); | |
1788 JvmtiVMObjectAllocEventCollector oam; | |
1789 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1790 bounds_check(cp, index, CHECK_NULL); | |
1791 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); | |
1792 return res; | |
1793 } | |
1794 JVM_END | |
1795 | |
1796 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1797 constantTag tag = cp->tag_at(index); | |
1798 if (!tag.is_field()) { | |
1799 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1800 } | |
1801 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1802 klassOop k_o; | |
1803 if (force_resolution) { | |
1804 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1805 } else { | |
1806 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1807 if (k_o == NULL) return NULL; | |
1808 } | |
1809 instanceKlassHandle k(THREAD, k_o); | |
1810 symbolOop name = cp->uncached_name_ref_at(index); | |
1811 symbolOop sig = cp->uncached_signature_ref_at(index); | |
1812 fieldDescriptor fd; | |
1813 klassOop target_klass = k->find_field(name, sig, &fd); | |
1814 if (target_klass == NULL) { | |
1815 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); | |
1816 } | |
1817 oop field = Reflection::new_field(&fd, true, CHECK_NULL); | |
1818 return JNIHandles::make_local(field); | |
1819 } | |
1820 | |
1821 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1822 { | |
1823 JVMWrapper("JVM_ConstantPoolGetFieldAt"); | |
1824 JvmtiVMObjectAllocEventCollector oam; | |
1825 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1826 bounds_check(cp, index, CHECK_NULL); | |
1827 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); | |
1828 return res; | |
1829 } | |
1830 JVM_END | |
1831 | |
1832 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1833 { | |
1834 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); | |
1835 JvmtiVMObjectAllocEventCollector oam; | |
1836 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1837 bounds_check(cp, index, CHECK_NULL); | |
1838 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); | |
1839 return res; | |
1840 } | |
1841 JVM_END | |
1842 | |
1843 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1844 { | |
1845 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); | |
1846 JvmtiVMObjectAllocEventCollector oam; | |
1847 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1848 bounds_check(cp, index, CHECK_NULL); | |
1849 constantTag tag = cp->tag_at(index); | |
1850 if (!tag.is_field_or_method()) { | |
1851 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1852 } | |
1853 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1854 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref)); | |
1855 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index)); | |
1856 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index)); | |
1857 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL); | |
1858 objArrayHandle dest(THREAD, dest_o); | |
1859 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); | |
1860 dest->obj_at_put(0, str()); | |
1861 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); | |
1862 dest->obj_at_put(1, str()); | |
1863 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); | |
1864 dest->obj_at_put(2, str()); | |
1865 return (jobjectArray) JNIHandles::make_local(dest()); | |
1866 } | |
1867 JVM_END | |
1868 | |
1869 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1870 { | |
1871 JVMWrapper("JVM_ConstantPoolGetIntAt"); | |
1872 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1873 bounds_check(cp, index, CHECK_0); | |
1874 constantTag tag = cp->tag_at(index); | |
1875 if (!tag.is_int()) { | |
1876 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1877 } | |
1878 return cp->int_at(index); | |
1879 } | |
1880 JVM_END | |
1881 | |
1882 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1883 { | |
1884 JVMWrapper("JVM_ConstantPoolGetLongAt"); | |
1885 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1886 bounds_check(cp, index, CHECK_(0L)); | |
1887 constantTag tag = cp->tag_at(index); | |
1888 if (!tag.is_long()) { | |
1889 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1890 } | |
1891 return cp->long_at(index); | |
1892 } | |
1893 JVM_END | |
1894 | |
1895 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1896 { | |
1897 JVMWrapper("JVM_ConstantPoolGetFloatAt"); | |
1898 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1899 bounds_check(cp, index, CHECK_(0.0f)); | |
1900 constantTag tag = cp->tag_at(index); | |
1901 if (!tag.is_float()) { | |
1902 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1903 } | |
1904 return cp->float_at(index); | |
1905 } | |
1906 JVM_END | |
1907 | |
1908 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1909 { | |
1910 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); | |
1911 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1912 bounds_check(cp, index, CHECK_(0.0)); | |
1913 constantTag tag = cp->tag_at(index); | |
1914 if (!tag.is_double()) { | |
1915 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1916 } | |
1917 return cp->double_at(index); | |
1918 } | |
1919 JVM_END | |
1920 | |
1921 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1922 { | |
1923 JVMWrapper("JVM_ConstantPoolGetStringAt"); | |
1924 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1925 bounds_check(cp, index, CHECK_NULL); | |
1926 constantTag tag = cp->tag_at(index); | |
1927 if (!tag.is_string() && !tag.is_unresolved_string()) { | |
1928 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1929 } | |
1930 oop str = cp->string_at(index, CHECK_NULL); | |
1931 return (jstring) JNIHandles::make_local(str); | |
1932 } | |
1933 JVM_END | |
1934 | |
1935 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1936 { | |
1937 JVMWrapper("JVM_ConstantPoolGetUTF8At"); | |
1938 JvmtiVMObjectAllocEventCollector oam; | |
1939 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1940 bounds_check(cp, index, CHECK_NULL); | |
1941 constantTag tag = cp->tag_at(index); | |
1942 if (!tag.is_symbol()) { | |
1943 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1944 } | |
1945 symbolOop sym_o = cp->symbol_at(index); | |
1946 symbolHandle sym(THREAD, sym_o); | |
1947 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
1948 return (jstring) JNIHandles::make_local(str()); | |
1949 } | |
1950 JVM_END | |
1951 | |
1952 | |
1953 // Assertion support. ////////////////////////////////////////////////////////// | |
1954 | |
1955 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) | |
1956 JVMWrapper("JVM_DesiredAssertionStatus"); | |
1957 assert(cls != NULL, "bad class"); | |
1958 | |
1959 oop r = JNIHandles::resolve(cls); | |
1960 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); | |
1961 if (java_lang_Class::is_primitive(r)) return false; | |
1962 | |
1963 klassOop k = java_lang_Class::as_klassOop(r); | |
1964 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); | |
1965 if (! Klass::cast(k)->oop_is_instance()) return false; | |
1966 | |
1967 ResourceMark rm(THREAD); | |
1968 const char* name = Klass::cast(k)->name()->as_C_string(); | |
1969 bool system_class = Klass::cast(k)->class_loader() == NULL; | |
1970 return JavaAssertions::enabled(name, system_class); | |
1971 | |
1972 JVM_END | |
1973 | |
1974 | |
1975 // Return a new AssertionStatusDirectives object with the fields filled in with | |
1976 // command-line assertion arguments (i.e., -ea, -da). | |
1977 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) | |
1978 JVMWrapper("JVM_AssertionStatusDirectives"); | |
1979 JvmtiVMObjectAllocEventCollector oam; | |
1980 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); | |
1981 return JNIHandles::make_local(env, asd); | |
1982 JVM_END | |
1983 | |
1984 // Verification //////////////////////////////////////////////////////////////////////////////// | |
1985 | |
1986 // Reflection for the verifier ///////////////////////////////////////////////////////////////// | |
1987 | |
1988 // RedefineClasses support: bug 6214132 caused verification to fail. | |
1989 // All functions from this section should call the jvmtiThreadSate function: | |
1990 // klassOop class_to_verify_considering_redefinition(klassOop klass). | |
1991 // The function returns a klassOop of the _scratch_class if the verifier | |
1992 // was invoked in the middle of the class redefinition. | |
1993 // Otherwise it returns its argument value which is the _the_class klassOop. | |
1994 // Please, refer to the description in the jvmtiThreadSate.hpp. | |
1995 | |
1996 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) | |
1997 JVMWrapper("JVM_GetClassNameUTF"); | |
1998 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1999 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2000 return Klass::cast(k)->name()->as_utf8(); | |
2001 JVM_END | |
2002 | |
2003 | |
2004 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) | |
2005 JVMWrapper("JVM_GetClassCPTypes"); | |
2006 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2007 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2008 // types will have length zero if this is not an instanceKlass | |
2009 // (length is determined by call to JVM_GetClassCPEntriesCount) | |
2010 if (Klass::cast(k)->oop_is_instance()) { | |
2011 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2012 for (int index = cp->length() - 1; index >= 0; index--) { | |
2013 constantTag tag = cp->tag_at(index); | |
2014 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : | |
2015 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); | |
2016 } | |
2017 } | |
2018 JVM_END | |
2019 | |
2020 | |
2021 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) | |
2022 JVMWrapper("JVM_GetClassCPEntriesCount"); | |
2023 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2024 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2025 if (!Klass::cast(k)->oop_is_instance()) | |
2026 return 0; | |
2027 return instanceKlass::cast(k)->constants()->length(); | |
2028 JVM_END | |
2029 | |
2030 | |
2031 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) | |
2032 JVMWrapper("JVM_GetClassFieldsCount"); | |
2033 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2034 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2035 if (!Klass::cast(k)->oop_is_instance()) | |
2036 return 0; | |
2037 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset; | |
2038 JVM_END | |
2039 | |
2040 | |
2041 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) | |
2042 JVMWrapper("JVM_GetClassMethodsCount"); | |
2043 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2044 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2045 if (!Klass::cast(k)->oop_is_instance()) | |
2046 return 0; | |
2047 return instanceKlass::cast(k)->methods()->length(); | |
2048 JVM_END | |
2049 | |
2050 | |
2051 // The following methods, used for the verifier, are never called with | |
2052 // array klasses, so a direct cast to instanceKlass is safe. | |
2053 // Typically, these methods are called in a loop with bounds determined | |
2054 // by the results of JVM_GetClass{Fields,Methods}Count, which return | |
2055 // zero for arrays. | |
2056 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) | |
2057 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); | |
2058 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2059 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2060 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2061 int length = methodOop(method)->checked_exceptions_length(); | |
2062 if (length > 0) { | |
2063 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); | |
2064 for (int i = 0; i < length; i++) { | |
2065 exceptions[i] = table[i].class_cp_index; | |
2066 } | |
2067 } | |
2068 JVM_END | |
2069 | |
2070 | |
2071 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) | |
2072 JVMWrapper("JVM_GetMethodIxExceptionsCount"); | |
2073 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2074 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2075 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2076 return methodOop(method)->checked_exceptions_length(); | |
2077 JVM_END | |
2078 | |
2079 | |
2080 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) | |
2081 JVMWrapper("JVM_GetMethodIxByteCode"); | |
2082 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2083 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2084 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2085 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); | |
2086 JVM_END | |
2087 | |
2088 | |
2089 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) | |
2090 JVMWrapper("JVM_GetMethodIxByteCodeLength"); | |
2091 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2092 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2093 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2094 return methodOop(method)->code_size(); | |
2095 JVM_END | |
2096 | |
2097 | |
2098 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) | |
2099 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); | |
2100 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2101 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2102 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2103 typeArrayOop extable = methodOop(method)->exception_table(); | |
2104 entry->start_pc = extable->int_at(entry_index * 4); | |
2105 entry->end_pc = extable->int_at(entry_index * 4 + 1); | |
2106 entry->handler_pc = extable->int_at(entry_index * 4 + 2); | |
2107 entry->catchType = extable->int_at(entry_index * 4 + 3); | |
2108 JVM_END | |
2109 | |
2110 | |
2111 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) | |
2112 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); | |
2113 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2114 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2115 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2116 return methodOop(method)->exception_table()->length() / 4; | |
2117 JVM_END | |
2118 | |
2119 | |
2120 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) | |
2121 JVMWrapper("JVM_GetMethodIxModifiers"); | |
2122 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2123 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2124 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2125 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2126 JVM_END | |
2127 | |
2128 | |
2129 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) | |
2130 JVMWrapper("JVM_GetFieldIxModifiers"); | |
2131 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2132 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2133 typeArrayOop fields = instanceKlass::cast(k)->fields(); | |
2134 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
2135 JVM_END | |
2136 | |
2137 | |
2138 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) | |
2139 JVMWrapper("JVM_GetMethodIxLocalsCount"); | |
2140 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2141 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2142 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2143 return methodOop(method)->max_locals(); | |
2144 JVM_END | |
2145 | |
2146 | |
2147 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) | |
2148 JVMWrapper("JVM_GetMethodIxArgsSize"); | |
2149 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2150 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2151 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2152 return methodOop(method)->size_of_parameters(); | |
2153 JVM_END | |
2154 | |
2155 | |
2156 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) | |
2157 JVMWrapper("JVM_GetMethodIxMaxStack"); | |
2158 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2159 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2160 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2161 return methodOop(method)->max_stack(); | |
2162 JVM_END | |
2163 | |
2164 | |
2165 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) | |
2166 JVMWrapper("JVM_IsConstructorIx"); | |
2167 ResourceMark rm(THREAD); | |
2168 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2169 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2170 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2171 return methodOop(method)->name() == vmSymbols::object_initializer_name(); | |
2172 JVM_END | |
2173 | |
2174 | |
2175 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2176 JVMWrapper("JVM_GetMethodIxIxUTF"); | |
2177 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2178 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2179 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2180 return methodOop(method)->name()->as_utf8(); | |
2181 JVM_END | |
2182 | |
2183 | |
2184 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2185 JVMWrapper("JVM_GetMethodIxSignatureUTF"); | |
2186 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2187 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2188 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2189 return methodOop(method)->signature()->as_utf8(); | |
2190 JVM_END | |
2191 | |
2192 /** | |
2193 * All of these JVM_GetCP-xxx methods are used by the old verifier to | |
2194 * read entries in the constant pool. Since the old verifier always | |
2195 * works on a copy of the code, it will not see any rewriting that | |
2196 * may possibly occur in the middle of verification. So it is important | |
2197 * that nothing it calls tries to use the cpCache instead of the raw | |
2198 * constant pool, so we must use cp->uncached_x methods when appropriate. | |
2199 */ | |
2200 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2201 JVMWrapper("JVM_GetCPFieldNameUTF"); | |
2202 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2203 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2204 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2205 switch (cp->tag_at(cp_index).value()) { | |
2206 case JVM_CONSTANT_Fieldref: | |
2207 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
2208 default: | |
2209 fatal("JVM_GetCPFieldNameUTF: illegal constant"); | |
2210 } | |
2211 ShouldNotReachHere(); | |
2212 return NULL; | |
2213 JVM_END | |
2214 | |
2215 | |
2216 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2217 JVMWrapper("JVM_GetCPMethodNameUTF"); | |
2218 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2219 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2220 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2221 switch (cp->tag_at(cp_index).value()) { | |
2222 case JVM_CONSTANT_InterfaceMethodref: | |
2223 case JVM_CONSTANT_Methodref: | |
2224 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
726
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2225 case JVM_CONSTANT_NameAndType: |
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2226 // for invokedynamic |
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2227 return cp->nt_name_ref_at(cp_index)->as_utf8(); |
0 | 2228 default: |
2229 fatal("JVM_GetCPMethodNameUTF: illegal constant"); | |
2230 } | |
2231 ShouldNotReachHere(); | |
2232 return NULL; | |
2233 JVM_END | |
2234 | |
2235 | |
2236 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2237 JVMWrapper("JVM_GetCPMethodSignatureUTF"); | |
2238 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2239 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2240 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2241 switch (cp->tag_at(cp_index).value()) { | |
2242 case JVM_CONSTANT_InterfaceMethodref: | |
2243 case JVM_CONSTANT_Methodref: | |
2244 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
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2245 case JVM_CONSTANT_NameAndType: |
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2246 // for invokedynamic |
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2247 return cp->nt_signature_ref_at(cp_index)->as_utf8(); |
0 | 2248 default: |
2249 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); | |
2250 } | |
2251 ShouldNotReachHere(); | |
2252 return NULL; | |
2253 JVM_END | |
2254 | |
2255 | |
2256 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2257 JVMWrapper("JVM_GetCPFieldSignatureUTF"); | |
2258 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2259 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2260 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2261 switch (cp->tag_at(cp_index).value()) { | |
2262 case JVM_CONSTANT_Fieldref: | |
2263 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
2264 default: | |
2265 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); | |
2266 } | |
2267 ShouldNotReachHere(); | |
2268 return NULL; | |
2269 JVM_END | |
2270 | |
2271 | |
2272 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2273 JVMWrapper("JVM_GetCPClassNameUTF"); | |
2274 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2275 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2276 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2277 symbolOop classname = cp->klass_name_at(cp_index); | |
2278 return classname->as_utf8(); | |
2279 JVM_END | |
2280 | |
2281 | |
2282 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2283 JVMWrapper("JVM_GetCPFieldClassNameUTF"); | |
2284 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2285 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2286 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2287 switch (cp->tag_at(cp_index).value()) { | |
2288 case JVM_CONSTANT_Fieldref: { | |
2289 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
2290 symbolOop classname = cp->klass_name_at(class_index); | |
2291 return classname->as_utf8(); | |
2292 } | |
2293 default: | |
2294 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); | |
2295 } | |
2296 ShouldNotReachHere(); | |
2297 return NULL; | |
2298 JVM_END | |
2299 | |
2300 | |
2301 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2302 JVMWrapper("JVM_GetCPMethodClassNameUTF"); | |
2303 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2304 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2305 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2306 switch (cp->tag_at(cp_index).value()) { | |
2307 case JVM_CONSTANT_Methodref: | |
2308 case JVM_CONSTANT_InterfaceMethodref: { | |
2309 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
2310 symbolOop classname = cp->klass_name_at(class_index); | |
2311 return classname->as_utf8(); | |
2312 } | |
2313 default: | |
2314 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); | |
2315 } | |
2316 ShouldNotReachHere(); | |
2317 return NULL; | |
2318 JVM_END | |
2319 | |
2320 | |
2321 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2322 JVMWrapper("JVM_GetCPFieldModifiers"); | |
2323 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2324 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2325 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2326 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2327 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2328 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); | |
2329 switch (cp->tag_at(cp_index).value()) { | |
2330 case JVM_CONSTANT_Fieldref: { | |
2331 symbolOop name = cp->uncached_name_ref_at(cp_index); | |
2332 symbolOop signature = cp->uncached_signature_ref_at(cp_index); | |
2333 typeArrayOop fields = instanceKlass::cast(k_called)->fields(); | |
2334 int fields_count = fields->length(); | |
2335 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) { | |
2336 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name && | |
2337 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) { | |
2338 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
2339 } | |
2340 } | |
2341 return -1; | |
2342 } | |
2343 default: | |
2344 fatal("JVM_GetCPFieldModifiers: illegal constant"); | |
2345 } | |
2346 ShouldNotReachHere(); | |
2347 return 0; | |
2348 JVM_END | |
2349 | |
2350 | |
2351 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2352 JVMWrapper("JVM_GetCPMethodModifiers"); | |
2353 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2354 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2355 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2356 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2357 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2358 switch (cp->tag_at(cp_index).value()) { | |
2359 case JVM_CONSTANT_Methodref: | |
2360 case JVM_CONSTANT_InterfaceMethodref: { | |
2361 symbolOop name = cp->uncached_name_ref_at(cp_index); | |
2362 symbolOop signature = cp->uncached_signature_ref_at(cp_index); | |
2363 objArrayOop methods = instanceKlass::cast(k_called)->methods(); | |
2364 int methods_count = methods->length(); | |
2365 for (int i = 0; i < methods_count; i++) { | |
2366 methodOop method = methodOop(methods->obj_at(i)); | |
2367 if (method->name() == name && method->signature() == signature) { | |
2368 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2369 } | |
2370 } | |
2371 return -1; | |
2372 } | |
2373 default: | |
2374 fatal("JVM_GetCPMethodModifiers: illegal constant"); | |
2375 } | |
2376 ShouldNotReachHere(); | |
2377 return 0; | |
2378 JVM_END | |
2379 | |
2380 | |
2381 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// | |
2382 | |
2383 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) | |
2384 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything | |
2385 JVM_END | |
2386 | |
2387 | |
2388 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) | |
2389 JVMWrapper("JVM_IsSameClassPackage"); | |
2390 oop class1_mirror = JNIHandles::resolve_non_null(class1); | |
2391 oop class2_mirror = JNIHandles::resolve_non_null(class2); | |
2392 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); | |
2393 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); | |
2394 return (jboolean) Reflection::is_same_class_package(klass1, klass2); | |
2395 JVM_END | |
2396 | |
2397 | |
2398 // IO functions //////////////////////////////////////////////////////////////////////////////////////// | |
2399 | |
2400 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) | |
2401 JVMWrapper2("JVM_Open (%s)", fname); | |
2402 | |
2403 //%note jvm_r6 | |
2404 int result = hpi::open(fname, flags, mode); | |
2405 if (result >= 0) { | |
2406 return result; | |
2407 } else { | |
2408 switch(errno) { | |
2409 case EEXIST: | |
2410 return JVM_EEXIST; | |
2411 default: | |
2412 return -1; | |
2413 } | |
2414 } | |
2415 JVM_END | |
2416 | |
2417 | |
2418 JVM_LEAF(jint, JVM_Close(jint fd)) | |
2419 JVMWrapper2("JVM_Close (0x%x)", fd); | |
2420 //%note jvm_r6 | |
2421 return hpi::close(fd); | |
2422 JVM_END | |
2423 | |
2424 | |
2425 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) | |
2426 JVMWrapper2("JVM_Read (0x%x)", fd); | |
2427 | |
2428 //%note jvm_r6 | |
2429 return (jint)hpi::read(fd, buf, nbytes); | |
2430 JVM_END | |
2431 | |
2432 | |
2433 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) | |
2434 JVMWrapper2("JVM_Write (0x%x)", fd); | |
2435 | |
2436 //%note jvm_r6 | |
2437 return (jint)hpi::write(fd, buf, nbytes); | |
2438 JVM_END | |
2439 | |
2440 | |
2441 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) | |
2442 JVMWrapper2("JVM_Available (0x%x)", fd); | |
2443 //%note jvm_r6 | |
2444 return hpi::available(fd, pbytes); | |
2445 JVM_END | |
2446 | |
2447 | |
2448 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) | |
2449 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); | |
2450 //%note jvm_r6 | |
2451 return hpi::lseek(fd, offset, whence); | |
2452 JVM_END | |
2453 | |
2454 | |
2455 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) | |
2456 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); | |
2457 return hpi::ftruncate(fd, length); | |
2458 JVM_END | |
2459 | |
2460 | |
2461 JVM_LEAF(jint, JVM_Sync(jint fd)) | |
2462 JVMWrapper2("JVM_Sync (0x%x)", fd); | |
2463 //%note jvm_r6 | |
2464 return hpi::fsync(fd); | |
2465 JVM_END | |
2466 | |
2467 | |
2468 // Printing support ////////////////////////////////////////////////// | |
2469 extern "C" { | |
2470 | |
2471 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { | |
2472 // see bug 4399518, 4417214 | |
2473 if ((intptr_t)count <= 0) return -1; | |
2474 return vsnprintf(str, count, fmt, args); | |
2475 } | |
2476 | |
2477 | |
2478 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { | |
2479 va_list args; | |
2480 int len; | |
2481 va_start(args, fmt); | |
2482 len = jio_vsnprintf(str, count, fmt, args); | |
2483 va_end(args); | |
2484 return len; | |
2485 } | |
2486 | |
2487 | |
2488 int jio_fprintf(FILE* f, const char *fmt, ...) { | |
2489 int len; | |
2490 va_list args; | |
2491 va_start(args, fmt); | |
2492 len = jio_vfprintf(f, fmt, args); | |
2493 va_end(args); | |
2494 return len; | |
2495 } | |
2496 | |
2497 | |
2498 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { | |
2499 if (Arguments::vfprintf_hook() != NULL) { | |
2500 return Arguments::vfprintf_hook()(f, fmt, args); | |
2501 } else { | |
2502 return vfprintf(f, fmt, args); | |
2503 } | |
2504 } | |
2505 | |
2506 | |
2507 int jio_printf(const char *fmt, ...) { | |
2508 int len; | |
2509 va_list args; | |
2510 va_start(args, fmt); | |
2511 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); | |
2512 va_end(args); | |
2513 return len; | |
2514 } | |
2515 | |
2516 | |
2517 // HotSpot specific jio method | |
2518 void jio_print(const char* s) { | |
2519 // Try to make this function as atomic as possible. | |
2520 if (Arguments::vfprintf_hook() != NULL) { | |
2521 jio_fprintf(defaultStream::output_stream(), "%s", s); | |
2522 } else { | |
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2523 // Make an unused local variable to avoid warning from gcc 4.x compiler. |
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2524 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); |
0 | 2525 } |
2526 } | |
2527 | |
2528 } // Extern C | |
2529 | |
2530 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// | |
2531 | |
2532 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock | |
2533 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or | |
2534 // OSThread objects. The exception to this rule is when the target object is the thread | |
2535 // doing the operation, in which case we know that the thread won't exit until the | |
2536 // operation is done (all exits being voluntary). There are a few cases where it is | |
2537 // rather silly to do operations on yourself, like resuming yourself or asking whether | |
2538 // you are alive. While these can still happen, they are not subject to deadlocks if | |
2539 // the lock is held while the operation occurs (this is not the case for suspend, for | |
2540 // instance), and are very unlikely. Because IsAlive needs to be fast and its | |
2541 // implementation is local to this file, we always lock Threads_lock for that one. | |
2542 | |
2543 static void thread_entry(JavaThread* thread, TRAPS) { | |
2544 HandleMark hm(THREAD); | |
2545 Handle obj(THREAD, thread->threadObj()); | |
2546 JavaValue result(T_VOID); | |
2547 JavaCalls::call_virtual(&result, | |
2548 obj, | |
2549 KlassHandle(THREAD, SystemDictionary::thread_klass()), | |
2550 vmSymbolHandles::run_method_name(), | |
2551 vmSymbolHandles::void_method_signature(), | |
2552 THREAD); | |
2553 } | |
2554 | |
2555 | |
2556 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) | |
2557 JVMWrapper("JVM_StartThread"); | |
2558 JavaThread *native_thread = NULL; | |
2559 | |
2560 // We cannot hold the Threads_lock when we throw an exception, | |
2561 // due to rank ordering issues. Example: we might need to grab the | |
2562 // Heap_lock while we construct the exception. | |
2563 bool throw_illegal_thread_state = false; | |
2564 | |
2565 // We must release the Threads_lock before we can post a jvmti event | |
2566 // in Thread::start. | |
2567 { | |
2568 // Ensure that the C++ Thread and OSThread structures aren't freed before | |
2569 // we operate. | |
2570 MutexLocker mu(Threads_lock); | |
2571 | |
2572 // Check to see if we're running a thread that's already exited or was | |
2573 // stopped (is_stillborn) or is still active (thread is not NULL). | |
2574 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) || | |
2575 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { | |
2576 throw_illegal_thread_state = true; | |
2577 } else { | |
2578 jlong size = | |
2579 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); | |
2580 // Allocate the C++ Thread structure and create the native thread. The | |
2581 // stack size retrieved from java is signed, but the constructor takes | |
2582 // size_t (an unsigned type), so avoid passing negative values which would | |
2583 // result in really large stacks. | |
2584 size_t sz = size > 0 ? (size_t) size : 0; | |
2585 native_thread = new JavaThread(&thread_entry, sz); | |
2586 | |
2587 // At this point it may be possible that no osthread was created for the | |
2588 // JavaThread due to lack of memory. Check for this situation and throw | |
2589 // an exception if necessary. Eventually we may want to change this so | |
2590 // that we only grab the lock if the thread was created successfully - | |
2591 // then we can also do this check and throw the exception in the | |
2592 // JavaThread constructor. | |
2593 if (native_thread->osthread() != NULL) { | |
2594 // Note: the current thread is not being used within "prepare". | |
2595 native_thread->prepare(jthread); | |
2596 } | |
2597 } | |
2598 } | |
2599 | |
2600 if (throw_illegal_thread_state) { | |
2601 THROW(vmSymbols::java_lang_IllegalThreadStateException()); | |
2602 } | |
2603 | |
2604 assert(native_thread != NULL, "Starting null thread?"); | |
2605 | |
2606 if (native_thread->osthread() == NULL) { | |
2607 // No one should hold a reference to the 'native_thread'. | |
2608 delete native_thread; | |
2609 if (JvmtiExport::should_post_resource_exhausted()) { | |
2610 JvmtiExport::post_resource_exhausted( | |
2611 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, | |
2612 "unable to create new native thread"); | |
2613 } | |
2614 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), | |
2615 "unable to create new native thread"); | |
2616 } | |
2617 | |
2618 Thread::start(native_thread); | |
2619 | |
2620 JVM_END | |
2621 | |
2622 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints | |
2623 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, | |
2624 // but is thought to be reliable and simple. In the case, where the receiver is the | |
2625 // save thread as the sender, no safepoint is needed. | |
2626 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) | |
2627 JVMWrapper("JVM_StopThread"); | |
2628 | |
2629 oop java_throwable = JNIHandles::resolve(throwable); | |
2630 if (java_throwable == NULL) { | |
2631 THROW(vmSymbols::java_lang_NullPointerException()); | |
2632 } | |
2633 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2634 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2635 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable); | |
2636 // First check if thread already exited | |
2637 if (receiver != NULL) { | |
2638 // Check if exception is getting thrown at self (use oop equality, since the | |
2639 // target object might exit) | |
2640 if (java_thread == thread->threadObj()) { | |
2641 // This is a change from JDK 1.1, but JDK 1.2 will also do it: | |
2642 // NOTE (from JDK 1.2): this is done solely to prevent stopped | |
2643 // threads from being restarted. | |
2644 // Fix for 4314342, 4145910, perhaps others: it now doesn't have | |
2645 // any effect on the "liveness" of a thread; see | |
2646 // JVM_IsThreadAlive, below. | |
2647 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) { | |
2648 java_lang_Thread::set_stillborn(java_thread); | |
2649 } | |
2650 THROW_OOP(java_throwable); | |
2651 } else { | |
2652 // Enques a VM_Operation to stop all threads and then deliver the exception... | |
2653 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); | |
2654 } | |
2655 } | |
2656 JVM_END | |
2657 | |
2658 | |
2659 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) | |
2660 JVMWrapper("JVM_IsThreadAlive"); | |
2661 | |
2662 oop thread_oop = JNIHandles::resolve_non_null(jthread); | |
2663 return java_lang_Thread::is_alive(thread_oop); | |
2664 JVM_END | |
2665 | |
2666 | |
2667 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) | |
2668 JVMWrapper("JVM_SuspendThread"); | |
2669 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2670 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2671 | |
2672 if (receiver != NULL) { | |
2673 // thread has run and has not exited (still on threads list) | |
2674 | |
2675 { | |
2676 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); | |
2677 if (receiver->is_external_suspend()) { | |
2678 // Don't allow nested external suspend requests. We can't return | |
2679 // an error from this interface so just ignore the problem. | |
2680 return; | |
2681 } | |
2682 if (receiver->is_exiting()) { // thread is in the process of exiting | |
2683 return; | |
2684 } | |
2685 receiver->set_external_suspend(); | |
2686 } | |
2687 | |
2688 // java_suspend() will catch threads in the process of exiting | |
2689 // and will ignore them. | |
2690 receiver->java_suspend(); | |
2691 | |
2692 // It would be nice to have the following assertion in all the | |
2693 // time, but it is possible for a racing resume request to have | |
2694 // resumed this thread right after we suspended it. Temporarily | |
2695 // enable this assertion if you are chasing a different kind of | |
2696 // bug. | |
2697 // | |
2698 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || | |
2699 // receiver->is_being_ext_suspended(), "thread is not suspended"); | |
2700 } | |
2701 JVM_END | |
2702 | |
2703 | |
2704 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) | |
2705 JVMWrapper("JVM_ResumeThread"); | |
2706 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. | |
2707 // We need to *always* get the threads lock here, since this operation cannot be allowed during | |
2708 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other | |
2709 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code | |
2710 // looks at it. | |
2711 MutexLocker ml(Threads_lock); | |
2712 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2713 if (thr != NULL) { | |
2714 // the thread has run and is not in the process of exiting | |
2715 thr->java_resume(); | |
2716 } | |
2717 JVM_END | |
2718 | |
2719 | |
2720 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) | |
2721 JVMWrapper("JVM_SetThreadPriority"); | |
2722 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2723 MutexLocker ml(Threads_lock); | |
2724 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2725 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); | |
2726 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
2727 if (thr != NULL) { // Thread not yet started; priority pushed down when it is | |
2728 Thread::set_priority(thr, (ThreadPriority)prio); | |
2729 } | |
2730 JVM_END | |
2731 | |
2732 | |
2733 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) | |
2734 JVMWrapper("JVM_Yield"); | |
2735 if (os::dont_yield()) return; | |
2736 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. | |
2737 // Critical for similar threading behaviour | |
2738 if (ConvertYieldToSleep) { | |
2739 os::sleep(thread, MinSleepInterval, false); | |
2740 } else { | |
2741 os::yield(); | |
2742 } | |
2743 JVM_END | |
2744 | |
2745 | |
2746 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) | |
2747 JVMWrapper("JVM_Sleep"); | |
2748 | |
2749 if (millis < 0) { | |
2750 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); | |
2751 } | |
2752 | |
2753 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { | |
2754 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2755 } | |
2756 | |
2757 // Save current thread state and restore it at the end of this block. | |
2758 // And set new thread state to SLEEPING. | |
2759 JavaThreadSleepState jtss(thread); | |
2760 | |
2761 if (millis == 0) { | |
2762 // When ConvertSleepToYield is on, this matches the classic VM implementation of | |
2763 // JVM_Sleep. Critical for similar threading behaviour (Win32) | |
2764 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep | |
2765 // for SOLARIS | |
2766 if (ConvertSleepToYield) { | |
2767 os::yield(); | |
2768 } else { | |
2769 ThreadState old_state = thread->osthread()->get_state(); | |
2770 thread->osthread()->set_state(SLEEPING); | |
2771 os::sleep(thread, MinSleepInterval, false); | |
2772 thread->osthread()->set_state(old_state); | |
2773 } | |
2774 } else { | |
2775 ThreadState old_state = thread->osthread()->get_state(); | |
2776 thread->osthread()->set_state(SLEEPING); | |
2777 if (os::sleep(thread, millis, true) == OS_INTRPT) { | |
2778 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on | |
2779 // us while we were sleeping. We do not overwrite those. | |
2780 if (!HAS_PENDING_EXCEPTION) { | |
2781 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() | |
2782 // to properly restore the thread state. That's likely wrong. | |
2783 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2784 } | |
2785 } | |
2786 thread->osthread()->set_state(old_state); | |
2787 } | |
2788 JVM_END | |
2789 | |
2790 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) | |
2791 JVMWrapper("JVM_CurrentThread"); | |
2792 oop jthread = thread->threadObj(); | |
2793 assert (thread != NULL, "no current thread!"); | |
2794 return JNIHandles::make_local(env, jthread); | |
2795 JVM_END | |
2796 | |
2797 | |
2798 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) | |
2799 JVMWrapper("JVM_CountStackFrames"); | |
2800 | |
2801 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2802 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2803 bool throw_illegal_thread_state = false; | |
2804 int count = 0; | |
2805 | |
2806 { | |
2807 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2808 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2809 // acquire of the lock | |
2810 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2811 | |
2812 if (thr == NULL) { | |
2813 // do nothing | |
2814 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { | |
2815 // Check whether this java thread has been suspended already. If not, throws | |
2816 // IllegalThreadStateException. We defer to throw that exception until | |
2817 // Threads_lock is released since loading exception class has to leave VM. | |
2818 // The correct way to test a thread is actually suspended is | |
2819 // wait_for_ext_suspend_completion(), but we can't call that while holding | |
2820 // the Threads_lock. The above tests are sufficient for our purposes | |
2821 // provided the walkability of the stack is stable - which it isn't | |
2822 // 100% but close enough for most practical purposes. | |
2823 throw_illegal_thread_state = true; | |
2824 } else { | |
2825 // Count all java activation, i.e., number of vframes | |
2826 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { | |
2827 // Native frames are not counted | |
2828 if (!vfst.method()->is_native()) count++; | |
2829 } | |
2830 } | |
2831 } | |
2832 | |
2833 if (throw_illegal_thread_state) { | |
2834 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), | |
2835 "this thread is not suspended"); | |
2836 } | |
2837 return count; | |
2838 JVM_END | |
2839 | |
2840 // Consider: A better way to implement JVM_Interrupt() is to acquire | |
2841 // Threads_lock to resolve the jthread into a Thread pointer, fetch | |
2842 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., | |
2843 // drop Threads_lock, and the perform the unpark() and thr_kill() operations | |
2844 // outside the critical section. Threads_lock is hot so we want to minimize | |
2845 // the hold-time. A cleaner interface would be to decompose interrupt into | |
2846 // two steps. The 1st phase, performed under Threads_lock, would return | |
2847 // a closure that'd be invoked after Threads_lock was dropped. | |
2848 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and | |
2849 // admit spurious wakeups. | |
2850 | |
2851 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) | |
2852 JVMWrapper("JVM_Interrupt"); | |
2853 | |
2854 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2855 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2856 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2857 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2858 // acquire of the lock | |
2859 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2860 if (thr != NULL) { | |
2861 Thread::interrupt(thr); | |
2862 } | |
2863 JVM_END | |
2864 | |
2865 | |
2866 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) | |
2867 JVMWrapper("JVM_IsInterrupted"); | |
2868 | |
2869 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2870 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2871 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2872 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2873 // acquire of the lock | |
2874 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2875 if (thr == NULL) { | |
2876 return JNI_FALSE; | |
2877 } else { | |
2878 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); | |
2879 } | |
2880 JVM_END | |
2881 | |
2882 | |
2883 // Return true iff the current thread has locked the object passed in | |
2884 | |
2885 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) | |
2886 JVMWrapper("JVM_HoldsLock"); | |
2887 assert(THREAD->is_Java_thread(), "sanity check"); | |
2888 if (obj == NULL) { | |
2889 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
2890 } | |
2891 Handle h_obj(THREAD, JNIHandles::resolve(obj)); | |
2892 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); | |
2893 JVM_END | |
2894 | |
2895 | |
2896 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) | |
2897 JVMWrapper("JVM_DumpAllStacks"); | |
2898 VM_PrintThreads op; | |
2899 VMThread::execute(&op); | |
2900 if (JvmtiExport::should_post_data_dump()) { | |
2901 JvmtiExport::post_data_dump(); | |
2902 } | |
2903 JVM_END | |
2904 | |
2905 | |
2906 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// | |
2907 | |
2908 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { | |
2909 assert(jthread->is_Java_thread(), "must be a Java thread"); | |
2910 if (jthread->privileged_stack_top() == NULL) return false; | |
2911 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { | |
2912 oop loader = jthread->privileged_stack_top()->class_loader(); | |
2913 if (loader == NULL) return true; | |
2914 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
2915 if (trusted) return true; | |
2916 } | |
2917 return false; | |
2918 } | |
2919 | |
2920 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) | |
2921 JVMWrapper("JVM_CurrentLoadedClass"); | |
2922 ResourceMark rm(THREAD); | |
2923 | |
2924 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
2925 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
2926 bool trusted = is_trusted_frame(thread, &vfst); | |
2927 if (trusted) return NULL; | |
2928 | |
2929 methodOop m = vfst.method(); | |
2930 if (!m->is_native()) { | |
2931 klassOop holder = m->method_holder(); | |
2932 oop loader = instanceKlass::cast(holder)->class_loader(); | |
2933 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
2934 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); | |
2935 } | |
2936 } | |
2937 } | |
2938 return NULL; | |
2939 JVM_END | |
2940 | |
2941 | |
2942 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) | |
2943 JVMWrapper("JVM_CurrentClassLoader"); | |
2944 ResourceMark rm(THREAD); | |
2945 | |
2946 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
2947 | |
2948 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
2949 bool trusted = is_trusted_frame(thread, &vfst); | |
2950 if (trusted) return NULL; | |
2951 | |
2952 methodOop m = vfst.method(); | |
2953 if (!m->is_native()) { | |
2954 klassOop holder = m->method_holder(); | |
2955 assert(holder->is_klass(), "just checking"); | |
2956 oop loader = instanceKlass::cast(holder)->class_loader(); | |
2957 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
2958 return JNIHandles::make_local(env, loader); | |
2959 } | |
2960 } | |
2961 } | |
2962 return NULL; | |
2963 JVM_END | |
2964 | |
2965 | |
2966 // Utility object for collecting method holders walking down the stack | |
2967 class KlassLink: public ResourceObj { | |
2968 public: | |
2969 KlassHandle klass; | |
2970 KlassLink* next; | |
2971 | |
2972 KlassLink(KlassHandle k) { klass = k; next = NULL; } | |
2973 }; | |
2974 | |
2975 | |
2976 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) | |
2977 JVMWrapper("JVM_GetClassContext"); | |
2978 ResourceMark rm(THREAD); | |
2979 JvmtiVMObjectAllocEventCollector oam; | |
2980 // Collect linked list of (handles to) method holders | |
2981 KlassLink* first = NULL; | |
2982 KlassLink* last = NULL; | |
2983 int depth = 0; | |
2984 | |
2985 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { | |
2986 // Native frames are not returned | |
2987 if (!vfst.method()->is_native()) { | |
2988 klassOop holder = vfst.method()->method_holder(); | |
2989 assert(holder->is_klass(), "just checking"); | |
2990 depth++; | |
2991 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); | |
2992 if (first == NULL) { | |
2993 first = last = l; | |
2994 } else { | |
2995 last->next = l; | |
2996 last = l; | |
2997 } | |
2998 } | |
2999 } | |
3000 | |
3001 // Create result array of type [Ljava/lang/Class; | |
3002 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL); | |
3003 // Fill in mirrors corresponding to method holders | |
3004 int index = 0; | |
3005 while (first != NULL) { | |
3006 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); | |
3007 first = first->next; | |
3008 } | |
3009 assert(index == depth, "just checking"); | |
3010 | |
3011 return (jobjectArray) JNIHandles::make_local(env, result); | |
3012 JVM_END | |
3013 | |
3014 | |
3015 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) | |
3016 JVMWrapper("JVM_ClassDepth"); | |
3017 ResourceMark rm(THREAD); | |
3018 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
3019 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); | |
3020 | |
3021 const char* str = java_lang_String::as_utf8_string(class_name_str()); | |
3022 symbolHandle class_name_sym = | |
3023 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str))); | |
3024 if (class_name_sym.is_null()) { | |
3025 return -1; | |
3026 } | |
3027 | |
3028 int depth = 0; | |
3029 | |
3030 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3031 if (!vfst.method()->is_native()) { | |
3032 klassOop holder = vfst.method()->method_holder(); | |
3033 assert(holder->is_klass(), "just checking"); | |
3034 if (instanceKlass::cast(holder)->name() == class_name_sym()) { | |
3035 return depth; | |
3036 } | |
3037 depth++; | |
3038 } | |
3039 } | |
3040 return -1; | |
3041 JVM_END | |
3042 | |
3043 | |
3044 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) | |
3045 JVMWrapper("JVM_ClassLoaderDepth"); | |
3046 ResourceMark rm(THREAD); | |
3047 int depth = 0; | |
3048 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3049 // if a method in a class in a trusted loader is in a doPrivileged, return -1 | |
3050 bool trusted = is_trusted_frame(thread, &vfst); | |
3051 if (trusted) return -1; | |
3052 | |
3053 methodOop m = vfst.method(); | |
3054 if (!m->is_native()) { | |
3055 klassOop holder = m->method_holder(); | |
3056 assert(holder->is_klass(), "just checking"); | |
3057 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3058 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3059 return depth; | |
3060 } | |
3061 depth++; | |
3062 } | |
3063 } | |
3064 return -1; | |
3065 JVM_END | |
3066 | |
3067 | |
3068 // java.lang.Package //////////////////////////////////////////////////////////////// | |
3069 | |
3070 | |
3071 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) | |
3072 JVMWrapper("JVM_GetSystemPackage"); | |
3073 ResourceMark rm(THREAD); | |
3074 JvmtiVMObjectAllocEventCollector oam; | |
3075 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3076 oop result = ClassLoader::get_system_package(str, CHECK_NULL); | |
3077 return (jstring) JNIHandles::make_local(result); | |
3078 JVM_END | |
3079 | |
3080 | |
3081 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) | |
3082 JVMWrapper("JVM_GetSystemPackages"); | |
3083 JvmtiVMObjectAllocEventCollector oam; | |
3084 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); | |
3085 return (jobjectArray) JNIHandles::make_local(result); | |
3086 JVM_END | |
3087 | |
3088 | |
3089 // ObjectInputStream /////////////////////////////////////////////////////////////// | |
3090 | |
3091 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { | |
3092 if (current_class == NULL) { | |
3093 return true; | |
3094 } | |
3095 if ((current_class == field_class) || access.is_public()) { | |
3096 return true; | |
3097 } | |
3098 | |
3099 if (access.is_protected()) { | |
3100 // See if current_class is a subclass of field_class | |
3101 if (Klass::cast(current_class)->is_subclass_of(field_class)) { | |
3102 return true; | |
3103 } | |
3104 } | |
3105 | |
3106 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); | |
3107 } | |
3108 | |
3109 | |
3110 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 | |
3111 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) | |
3112 JVMWrapper("JVM_AllocateNewObject"); | |
3113 JvmtiVMObjectAllocEventCollector oam; | |
3114 // Receiver is not used | |
3115 oop curr_mirror = JNIHandles::resolve_non_null(currClass); | |
3116 oop init_mirror = JNIHandles::resolve_non_null(initClass); | |
3117 | |
3118 // Cannot instantiate primitive types | |
3119 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { | |
3120 ResourceMark rm(THREAD); | |
3121 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3122 } | |
3123 | |
3124 // Arrays not allowed here, must use JVM_AllocateNewArray | |
3125 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || | |
3126 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { | |
3127 ResourceMark rm(THREAD); | |
3128 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3129 } | |
3130 | |
3131 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); | |
3132 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); | |
3133 | |
3134 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); | |
3135 | |
3136 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. | |
3137 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); | |
3138 | |
3139 // Make sure klass is initialized, since we are about to instantiate one of them. | |
3140 curr_klass->initialize(CHECK_NULL); | |
3141 | |
3142 methodHandle m (THREAD, | |
3143 init_klass->find_method(vmSymbols::object_initializer_name(), | |
3144 vmSymbols::void_method_signature())); | |
3145 if (m.is_null()) { | |
3146 ResourceMark rm(THREAD); | |
3147 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), | |
3148 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), | |
3149 vmSymbols::object_initializer_name(), | |
3150 vmSymbols::void_method_signature())); | |
3151 } | |
3152 | |
3153 if (curr_klass == init_klass && !m->is_public()) { | |
3154 // Calling the constructor for class 'curr_klass'. | |
3155 // Only allow calls to a public no-arg constructor. | |
3156 // This path corresponds to creating an Externalizable object. | |
3157 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3158 } | |
3159 | |
3160 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { | |
3161 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' | |
3162 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3163 } | |
3164 | |
3165 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); | |
3166 // Call constructor m. This might call a constructor higher up in the hierachy | |
3167 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); | |
3168 | |
3169 return JNIHandles::make_local(obj()); | |
3170 JVM_END | |
3171 | |
3172 | |
3173 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) | |
3174 JVMWrapper("JVM_AllocateNewArray"); | |
3175 JvmtiVMObjectAllocEventCollector oam; | |
3176 oop mirror = JNIHandles::resolve_non_null(currClass); | |
3177 | |
3178 if (java_lang_Class::is_primitive(mirror)) { | |
3179 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3180 } | |
3181 klassOop k = java_lang_Class::as_klassOop(mirror); | |
3182 oop result; | |
3183 | |
3184 if (k->klass_part()->oop_is_typeArray()) { | |
3185 // typeArray | |
3186 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); | |
3187 } else if (k->klass_part()->oop_is_objArray()) { | |
3188 // objArray | |
3189 objArrayKlassHandle oak(THREAD, k); | |
3190 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) | |
3191 result = oak->allocate(length, CHECK_NULL); | |
3192 } else { | |
3193 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3194 } | |
3195 return JNIHandles::make_local(env, result); | |
3196 JVM_END | |
3197 | |
3198 | |
3199 // Return the first non-null class loader up the execution stack, or null | |
3200 // if only code from the null class loader is on the stack. | |
3201 | |
3202 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) | |
3203 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3204 // UseNewReflection | |
3205 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection | |
3206 klassOop holder = vfst.method()->method_holder(); | |
3207 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3208 if (loader != NULL) { | |
3209 return JNIHandles::make_local(env, loader); | |
3210 } | |
3211 } | |
3212 return NULL; | |
3213 JVM_END | |
3214 | |
3215 | |
3216 // Load a class relative to the most recent class on the stack with a non-null | |
3217 // classloader. | |
3218 // This function has been deprecated and should not be considered part of the | |
3219 // specified JVM interface. | |
3220 | |
3221 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, | |
3222 jclass currClass, jstring currClassName)) | |
3223 JVMWrapper("JVM_LoadClass0"); | |
3224 // Receiver is not used | |
3225 ResourceMark rm(THREAD); | |
3226 | |
3227 // Class name argument is not guaranteed to be in internal format | |
3228 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); | |
3229 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); | |
3230 | |
3231 const char* str = java_lang_String::as_utf8_string(string()); | |
3232 | |
3233 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) { | |
3234 // It's impossible to create this class; the name cannot fit | |
3235 // into the constant pool. | |
3236 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); | |
3237 } | |
3238 | |
3239 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL); | |
3240 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); | |
3241 // Find the most recent class on the stack with a non-null classloader | |
3242 oop loader = NULL; | |
3243 oop protection_domain = NULL; | |
3244 if (curr_klass.is_null()) { | |
3245 for (vframeStream vfst(thread); | |
3246 !vfst.at_end() && loader == NULL; | |
3247 vfst.next()) { | |
3248 if (!vfst.method()->is_native()) { | |
3249 klassOop holder = vfst.method()->method_holder(); | |
3250 loader = instanceKlass::cast(holder)->class_loader(); | |
3251 protection_domain = instanceKlass::cast(holder)->protection_domain(); | |
3252 } | |
3253 } | |
3254 } else { | |
3255 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); | |
3256 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); | |
3257 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); | |
3258 } | |
3259 Handle h_loader(THREAD, loader); | |
3260 Handle h_prot (THREAD, protection_domain); | |
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3261 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3262 false, thread); |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3263 if (TraceClassResolution && result != NULL) { |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3264 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3265 } |
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6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3266 return result; |
0 | 3267 JVM_END |
3268 | |
3269 | |
3270 // Array /////////////////////////////////////////////////////////////////////////////////////////// | |
3271 | |
3272 | |
3273 // resolve array handle and check arguments | |
3274 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { | |
3275 if (arr == NULL) { | |
3276 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
3277 } | |
3278 oop a = JNIHandles::resolve_non_null(arr); | |
3279 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { | |
3280 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); | |
3281 } | |
3282 return arrayOop(a); | |
3283 } | |
3284 | |
3285 | |
3286 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) | |
3287 JVMWrapper("JVM_GetArrayLength"); | |
3288 arrayOop a = check_array(env, arr, false, CHECK_0); | |
3289 return a->length(); | |
3290 JVM_END | |
3291 | |
3292 | |
3293 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) | |
3294 JVMWrapper("JVM_Array_Get"); | |
3295 JvmtiVMObjectAllocEventCollector oam; | |
3296 arrayOop a = check_array(env, arr, false, CHECK_NULL); | |
3297 jvalue value; | |
3298 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); | |
3299 oop box = Reflection::box(&value, type, CHECK_NULL); | |
3300 return JNIHandles::make_local(env, box); | |
3301 JVM_END | |
3302 | |
3303 | |
3304 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) | |
3305 JVMWrapper("JVM_GetPrimitiveArrayElement"); | |
3306 jvalue value; | |
3307 value.i = 0; // to initialize value before getting used in CHECK | |
3308 arrayOop a = check_array(env, arr, true, CHECK_(value)); | |
3309 assert(a->is_typeArray(), "just checking"); | |
3310 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); | |
3311 BasicType wide_type = (BasicType) wCode; | |
3312 if (type != wide_type) { | |
3313 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
3314 } | |
3315 return value; | |
3316 JVM_END | |
3317 | |
3318 | |
3319 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) | |
3320 JVMWrapper("JVM_SetArrayElement"); | |
3321 arrayOop a = check_array(env, arr, false, CHECK); | |
3322 oop box = JNIHandles::resolve(val); | |
3323 jvalue value; | |
3324 value.i = 0; // to initialize value before getting used in CHECK | |
3325 BasicType value_type; | |
3326 if (a->is_objArray()) { | |
3327 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
3328 value_type = Reflection::unbox_for_regular_object(box, &value); | |
3329 } else { | |
3330 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
3331 } | |
3332 Reflection::array_set(&value, a, index, value_type, CHECK); | |
3333 JVM_END | |
3334 | |
3335 | |
3336 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) | |
3337 JVMWrapper("JVM_SetPrimitiveArrayElement"); | |
3338 arrayOop a = check_array(env, arr, true, CHECK); | |
3339 assert(a->is_typeArray(), "just checking"); | |
3340 BasicType value_type = (BasicType) vCode; | |
3341 Reflection::array_set(&v, a, index, value_type, CHECK); | |
3342 JVM_END | |
3343 | |
3344 | |
3345 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) | |
3346 JVMWrapper("JVM_NewArray"); | |
3347 JvmtiVMObjectAllocEventCollector oam; | |
3348 oop element_mirror = JNIHandles::resolve(eltClass); | |
3349 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); | |
3350 return JNIHandles::make_local(env, result); | |
3351 JVM_END | |
3352 | |
3353 | |
3354 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) | |
3355 JVMWrapper("JVM_NewMultiArray"); | |
3356 JvmtiVMObjectAllocEventCollector oam; | |
3357 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); | |
3358 oop element_mirror = JNIHandles::resolve(eltClass); | |
3359 assert(dim_array->is_typeArray(), "just checking"); | |
3360 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); | |
3361 return JNIHandles::make_local(env, result); | |
3362 JVM_END | |
3363 | |
3364 | |
3365 // Networking library support //////////////////////////////////////////////////////////////////// | |
3366 | |
3367 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) | |
3368 JVMWrapper("JVM_InitializeSocketLibrary"); | |
3369 return hpi::initialize_socket_library(); | |
3370 JVM_END | |
3371 | |
3372 | |
3373 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) | |
3374 JVMWrapper("JVM_Socket"); | |
3375 return hpi::socket(domain, type, protocol); | |
3376 JVM_END | |
3377 | |
3378 | |
3379 JVM_LEAF(jint, JVM_SocketClose(jint fd)) | |
3380 JVMWrapper2("JVM_SocketClose (0x%x)", fd); | |
3381 //%note jvm_r6 | |
3382 return hpi::socket_close(fd); | |
3383 JVM_END | |
3384 | |
3385 | |
3386 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) | |
3387 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); | |
3388 //%note jvm_r6 | |
3389 return hpi::socket_shutdown(fd, howto); | |
3390 JVM_END | |
3391 | |
3392 | |
3393 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) | |
3394 JVMWrapper2("JVM_Recv (0x%x)", fd); | |
3395 //%note jvm_r6 | |
3396 return hpi::recv(fd, buf, nBytes, flags); | |
3397 JVM_END | |
3398 | |
3399 | |
3400 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) | |
3401 JVMWrapper2("JVM_Send (0x%x)", fd); | |
3402 //%note jvm_r6 | |
3403 return hpi::send(fd, buf, nBytes, flags); | |
3404 JVM_END | |
3405 | |
3406 | |
3407 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) | |
3408 JVMWrapper2("JVM_Timeout (0x%x)", fd); | |
3409 //%note jvm_r6 | |
3410 return hpi::timeout(fd, timeout); | |
3411 JVM_END | |
3412 | |
3413 | |
3414 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) | |
3415 JVMWrapper2("JVM_Listen (0x%x)", fd); | |
3416 //%note jvm_r6 | |
3417 return hpi::listen(fd, count); | |
3418 JVM_END | |
3419 | |
3420 | |
3421 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) | |
3422 JVMWrapper2("JVM_Connect (0x%x)", fd); | |
3423 //%note jvm_r6 | |
3424 return hpi::connect(fd, him, len); | |
3425 JVM_END | |
3426 | |
3427 | |
3428 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) | |
3429 JVMWrapper2("JVM_Bind (0x%x)", fd); | |
3430 //%note jvm_r6 | |
3431 return hpi::bind(fd, him, len); | |
3432 JVM_END | |
3433 | |
3434 | |
3435 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) | |
3436 JVMWrapper2("JVM_Accept (0x%x)", fd); | |
3437 //%note jvm_r6 | |
3438 return hpi::accept(fd, him, (int *)len); | |
3439 JVM_END | |
3440 | |
3441 | |
3442 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) | |
3443 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); | |
3444 //%note jvm_r6 | |
3445 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen); | |
3446 JVM_END | |
3447 | |
3448 | |
3449 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) | |
3450 JVMWrapper2("JVM_GetSockName (0x%x)", fd); | |
3451 //%note jvm_r6 | |
3452 return hpi::get_sock_name(fd, him, len); | |
3453 JVM_END | |
3454 | |
3455 | |
3456 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) | |
3457 JVMWrapper2("JVM_SendTo (0x%x)", fd); | |
3458 //%note jvm_r6 | |
3459 return hpi::sendto(fd, buf, len, flags, to, tolen); | |
3460 JVM_END | |
3461 | |
3462 | |
3463 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) | |
3464 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); | |
3465 //%note jvm_r6 | |
3466 return hpi::socket_available(fd, pbytes); | |
3467 JVM_END | |
3468 | |
3469 | |
3470 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) | |
3471 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3472 //%note jvm_r6 | |
3473 return hpi::get_sock_opt(fd, level, optname, optval, optlen); | |
3474 JVM_END | |
3475 | |
3476 | |
3477 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) | |
3478 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3479 //%note jvm_r6 | |
3480 return hpi::set_sock_opt(fd, level, optname, optval, optlen); | |
3481 JVM_END | |
3482 | |
3483 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) | |
3484 JVMWrapper("JVM_GetHostName"); | |
3485 return hpi::get_host_name(name, namelen); | |
3486 JVM_END | |
3487 | |
3488 #ifdef _WINDOWS | |
3489 | |
3490 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type)) | |
3491 JVMWrapper("JVM_GetHostByAddr"); | |
3492 return hpi::get_host_by_addr(name, len, type); | |
3493 JVM_END | |
3494 | |
3495 | |
3496 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name)) | |
3497 JVMWrapper("JVM_GetHostByName"); | |
3498 return hpi::get_host_by_name(name); | |
3499 JVM_END | |
3500 | |
3501 | |
3502 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name)) | |
3503 JVMWrapper("JVM_GetProtoByName"); | |
3504 return hpi::get_proto_by_name(name); | |
3505 JVM_END | |
3506 | |
3507 #endif | |
3508 | |
3509 // Library support /////////////////////////////////////////////////////////////////////////// | |
3510 | |
3511 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) | |
3512 //%note jvm_ct | |
3513 JVMWrapper2("JVM_LoadLibrary (%s)", name); | |
3514 char ebuf[1024]; | |
3515 void *load_result; | |
3516 { | |
3517 ThreadToNativeFromVM ttnfvm(thread); | |
3518 load_result = hpi::dll_load(name, ebuf, sizeof ebuf); | |
3519 } | |
3520 if (load_result == NULL) { | |
3521 char msg[1024]; | |
3522 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); | |
3523 // Since 'ebuf' may contain a string encoded using | |
3524 // platform encoding scheme, we need to pass | |
3525 // Exceptions::unsafe_to_utf8 to the new_exception method | |
3526 // as the last argument. See bug 6367357. | |
3527 Handle h_exception = | |
3528 Exceptions::new_exception(thread, | |
3529 vmSymbols::java_lang_UnsatisfiedLinkError(), | |
3530 msg, Exceptions::unsafe_to_utf8); | |
3531 | |
3532 THROW_HANDLE_0(h_exception); | |
3533 } | |
3534 return load_result; | |
3535 JVM_END | |
3536 | |
3537 | |
3538 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) | |
3539 JVMWrapper("JVM_UnloadLibrary"); | |
3540 hpi::dll_unload(handle); | |
3541 JVM_END | |
3542 | |
3543 | |
3544 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) | |
3545 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); | |
3546 return hpi::dll_lookup(handle, name); | |
3547 JVM_END | |
3548 | |
3549 // Floating point support //////////////////////////////////////////////////////////////////// | |
3550 | |
3551 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) | |
3552 JVMWrapper("JVM_IsNaN"); | |
3553 return g_isnan(a); | |
3554 JVM_END | |
3555 | |
3556 | |
3557 | |
3558 // JNI version /////////////////////////////////////////////////////////////////////////////// | |
3559 | |
3560 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) | |
3561 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); | |
3562 return Threads::is_supported_jni_version_including_1_1(version); | |
3563 JVM_END | |
3564 | |
3565 | |
3566 // String support /////////////////////////////////////////////////////////////////////////// | |
3567 | |
3568 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) | |
3569 JVMWrapper("JVM_InternString"); | |
3570 JvmtiVMObjectAllocEventCollector oam; | |
3571 if (str == NULL) return NULL; | |
3572 oop string = JNIHandles::resolve_non_null(str); | |
3573 oop result = StringTable::intern(string, CHECK_NULL); | |
3574 return (jstring) JNIHandles::make_local(env, result); | |
3575 JVM_END | |
3576 | |
3577 | |
3578 // Raw monitor support ////////////////////////////////////////////////////////////////////// | |
3579 | |
3580 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock | |
3581 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because | |
3582 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check | |
3583 // that only works with java threads. | |
3584 | |
3585 | |
3586 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { | |
3587 VM_Exit::block_if_vm_exited(); | |
3588 JVMWrapper("JVM_RawMonitorCreate"); | |
3589 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); | |
3590 } | |
3591 | |
3592 | |
3593 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { | |
3594 VM_Exit::block_if_vm_exited(); | |
3595 JVMWrapper("JVM_RawMonitorDestroy"); | |
3596 delete ((Mutex*) mon); | |
3597 } | |
3598 | |
3599 | |
3600 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { | |
3601 VM_Exit::block_if_vm_exited(); | |
3602 JVMWrapper("JVM_RawMonitorEnter"); | |
3603 ((Mutex*) mon)->jvm_raw_lock(); | |
3604 return 0; | |
3605 } | |
3606 | |
3607 | |
3608 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { | |
3609 VM_Exit::block_if_vm_exited(); | |
3610 JVMWrapper("JVM_RawMonitorExit"); | |
3611 ((Mutex*) mon)->jvm_raw_unlock(); | |
3612 } | |
3613 | |
3614 | |
3615 // Support for Serialization | |
3616 | |
3617 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); | |
3618 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); | |
3619 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); | |
3620 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); | |
3621 | |
3622 static IntBitsToFloatFn int_bits_to_float_fn = NULL; | |
3623 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; | |
3624 static FloatToIntBitsFn float_to_int_bits_fn = NULL; | |
3625 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; | |
3626 | |
3627 | |
3628 void initialize_converter_functions() { | |
3629 if (JDK_Version::is_gte_jdk14x_version()) { | |
3630 // These functions only exist for compatibility with 1.3.1 and earlier | |
3631 return; | |
3632 } | |
3633 | |
3634 // called from universe_post_init() | |
3635 assert( | |
3636 int_bits_to_float_fn == NULL && | |
3637 long_bits_to_double_fn == NULL && | |
3638 float_to_int_bits_fn == NULL && | |
3639 double_to_long_bits_fn == NULL , | |
3640 "initialization done twice" | |
3641 ); | |
3642 // initialize | |
3643 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); | |
3644 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); | |
3645 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); | |
3646 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); | |
3647 // verify | |
3648 assert( | |
3649 int_bits_to_float_fn != NULL && | |
3650 long_bits_to_double_fn != NULL && | |
3651 float_to_int_bits_fn != NULL && | |
3652 double_to_long_bits_fn != NULL , | |
3653 "initialization failed" | |
3654 ); | |
3655 } | |
3656 | |
3657 | |
3658 // Serialization | |
3659 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3660 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3661 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3662 | |
3663 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3664 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3665 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3666 oop o = JNIHandles::resolve(obj); | |
3667 | |
3668 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3669 THROW(vmSymbols::java_lang_NullPointerException()); | |
3670 } | |
3671 | |
3672 jsize nfids = fids->length(); | |
3673 if (nfids == 0) return; | |
3674 | |
3675 if (tcodes->length() < nfids) { | |
3676 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3677 } | |
3678 | |
3679 jsize off = 0; | |
3680 /* loop through fields, setting values */ | |
3681 for (jsize i = 0; i < nfids; i++) { | |
3682 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3683 int field_offset; | |
3684 if (fid != NULL) { | |
3685 // NULL is a legal value for fid, but retrieving the field offset | |
3686 // trigger assertion in that case | |
3687 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3688 } | |
3689 | |
3690 switch (tcodes->char_at(i)) { | |
3691 case 'Z': | |
3692 if (fid != NULL) { | |
3693 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; | |
3694 o->bool_field_put(field_offset, val); | |
3695 } | |
3696 off++; | |
3697 break; | |
3698 | |
3699 case 'B': | |
3700 if (fid != NULL) { | |
3701 o->byte_field_put(field_offset, dbuf->byte_at(off)); | |
3702 } | |
3703 off++; | |
3704 break; | |
3705 | |
3706 case 'C': | |
3707 if (fid != NULL) { | |
3708 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3709 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3710 o->char_field_put(field_offset, val); | |
3711 } | |
3712 off += 2; | |
3713 break; | |
3714 | |
3715 case 'S': | |
3716 if (fid != NULL) { | |
3717 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3718 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3719 o->short_field_put(field_offset, val); | |
3720 } | |
3721 off += 2; | |
3722 break; | |
3723 | |
3724 case 'I': | |
3725 if (fid != NULL) { | |
3726 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3727 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3728 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3729 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3730 o->int_field_put(field_offset, ival); | |
3731 } | |
3732 off += 4; | |
3733 break; | |
3734 | |
3735 case 'F': | |
3736 if (fid != NULL) { | |
3737 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3738 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3739 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3740 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3741 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); | |
3742 o->float_field_put(field_offset, fval); | |
3743 } | |
3744 off += 4; | |
3745 break; | |
3746 | |
3747 case 'J': | |
3748 if (fid != NULL) { | |
3749 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3750 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3751 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3752 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3753 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3754 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3755 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3756 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3757 o->long_field_put(field_offset, lval); | |
3758 } | |
3759 off += 8; | |
3760 break; | |
3761 | |
3762 case 'D': | |
3763 if (fid != NULL) { | |
3764 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3765 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3766 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3767 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3768 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3769 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3770 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3771 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3772 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); | |
3773 o->double_field_put(field_offset, dval); | |
3774 } | |
3775 off += 8; | |
3776 break; | |
3777 | |
3778 default: | |
3779 // Illegal typecode | |
3780 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
3781 } | |
3782 } | |
3783 JVM_END | |
3784 | |
3785 | |
3786 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3787 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3788 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3789 | |
3790 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3791 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3792 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3793 oop o = JNIHandles::resolve(obj); | |
3794 | |
3795 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3796 THROW(vmSymbols::java_lang_NullPointerException()); | |
3797 } | |
3798 | |
3799 jsize nfids = fids->length(); | |
3800 if (nfids == 0) return; | |
3801 | |
3802 if (tcodes->length() < nfids) { | |
3803 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3804 } | |
3805 | |
3806 /* loop through fields, fetching values */ | |
3807 jsize off = 0; | |
3808 for (jsize i = 0; i < nfids; i++) { | |
3809 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3810 if (fid == NULL) { | |
3811 THROW(vmSymbols::java_lang_NullPointerException()); | |
3812 } | |
3813 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3814 | |
3815 switch (tcodes->char_at(i)) { | |
3816 case 'Z': | |
3817 { | |
3818 jboolean val = o->bool_field(field_offset); | |
3819 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); | |
3820 } | |
3821 break; | |
3822 | |
3823 case 'B': | |
3824 dbuf->byte_at_put(off++, o->byte_field(field_offset)); | |
3825 break; | |
3826 | |
3827 case 'C': | |
3828 { | |
3829 jchar val = o->char_field(field_offset); | |
3830 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3831 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3832 } | |
3833 break; | |
3834 | |
3835 case 'S': | |
3836 { | |
3837 jshort val = o->short_field(field_offset); | |
3838 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3839 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3840 } | |
3841 break; | |
3842 | |
3843 case 'I': | |
3844 { | |
3845 jint val = o->int_field(field_offset); | |
3846 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3847 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3848 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3849 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3850 } | |
3851 break; | |
3852 | |
3853 case 'F': | |
3854 { | |
3855 jfloat fval = o->float_field(field_offset); | |
3856 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); | |
3857 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); | |
3858 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); | |
3859 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); | |
3860 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); | |
3861 } | |
3862 break; | |
3863 | |
3864 case 'J': | |
3865 { | |
3866 jlong val = o->long_field(field_offset); | |
3867 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); | |
3868 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); | |
3869 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); | |
3870 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); | |
3871 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3872 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3873 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3874 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3875 } | |
3876 break; | |
3877 | |
3878 case 'D': | |
3879 { | |
3880 jdouble dval = o->double_field(field_offset); | |
3881 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); | |
3882 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); | |
3883 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); | |
3884 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); | |
3885 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); | |
3886 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); | |
3887 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); | |
3888 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); | |
3889 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); | |
3890 } | |
3891 break; | |
3892 | |
3893 default: | |
3894 // Illegal typecode | |
3895 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
3896 } | |
3897 } | |
3898 JVM_END | |
3899 | |
3900 | |
3901 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// | |
3902 | |
3903 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { | |
3904 // Security Note: | |
3905 // The Java level wrapper will perform the necessary security check allowing | |
3906 // us to pass the NULL as the initiating class loader. | |
3907 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); | |
3908 KlassHandle klass_handle(THREAD, klass); | |
3909 // Check if we should initialize the class | |
3910 if (init && klass_handle->oop_is_instance()) { | |
3911 klass_handle->initialize(CHECK_NULL); | |
3912 } | |
3913 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); | |
3914 } | |
3915 | |
3916 | |
3917 // Internal SQE debugging support /////////////////////////////////////////////////////////// | |
3918 | |
3919 #ifndef PRODUCT | |
3920 | |
3921 extern "C" { | |
3922 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); | |
3923 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); | |
3924 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); | |
3925 } | |
3926 | |
3927 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) | |
3928 JVMWrapper("JVM_AccessBoolVMFlag"); | |
3929 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); | |
3930 JVM_END | |
3931 | |
3932 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) | |
3933 JVMWrapper("JVM_AccessVMIntFlag"); | |
3934 intx v; | |
3935 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); | |
3936 *value = (jint)v; | |
3937 return result; | |
3938 JVM_END | |
3939 | |
3940 | |
3941 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) | |
3942 JVMWrapper("JVM_VMBreakPoint"); | |
3943 oop the_obj = JNIHandles::resolve(obj); | |
3944 BREAKPOINT; | |
3945 JVM_END | |
3946 | |
3947 | |
3948 #endif | |
3949 | |
3950 | |
3951 //--------------------------------------------------------------------------- | |
3952 // | |
3953 // Support for old native code-based reflection (pre-JDK 1.4) | |
3954 // Disabled by default in the product build. | |
3955 // | |
3956 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION | |
3957 // | |
3958 //--------------------------------------------------------------------------- | |
3959 | |
3960 #ifdef SUPPORT_OLD_REFLECTION | |
3961 | |
3962 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which)) | |
3963 JVMWrapper("JVM_GetClassFields"); | |
3964 JvmtiVMObjectAllocEventCollector oam; | |
3965 oop mirror = JNIHandles::resolve_non_null(cls); | |
3966 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL); | |
3967 return (jobjectArray) JNIHandles::make_local(env, result); | |
3968 JVM_END | |
3969 | |
3970 | |
3971 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which)) | |
3972 JVMWrapper("JVM_GetClassMethods"); | |
3973 JvmtiVMObjectAllocEventCollector oam; | |
3974 oop mirror = JNIHandles::resolve_non_null(cls); | |
3975 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL); | |
3976 //%note jvm_r4 | |
3977 return (jobjectArray) JNIHandles::make_local(env, result); | |
3978 JVM_END | |
3979 | |
3980 | |
3981 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which)) | |
3982 JVMWrapper("JVM_GetClassConstructors"); | |
3983 JvmtiVMObjectAllocEventCollector oam; | |
3984 oop mirror = JNIHandles::resolve_non_null(cls); | |
3985 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL); | |
3986 //%note jvm_r4 | |
3987 return (jobjectArray) JNIHandles::make_local(env, result); | |
3988 JVM_END | |
3989 | |
3990 | |
3991 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which)) | |
3992 JVMWrapper("JVM_GetClassField"); | |
3993 JvmtiVMObjectAllocEventCollector oam; | |
3994 if (name == NULL) return NULL; | |
3995 Handle str (THREAD, JNIHandles::resolve_non_null(name)); | |
3996 | |
3997 const char* cstr = java_lang_String::as_utf8_string(str()); | |
3998 symbolHandle field_name = | |
3999 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); | |
4000 if (field_name.is_null()) { | |
4001 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); | |
4002 } | |
4003 | |
4004 oop mirror = JNIHandles::resolve_non_null(cls); | |
4005 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL); | |
4006 if (result == NULL) { | |
4007 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); | |
4008 } | |
4009 return JNIHandles::make_local(env, result); | |
4010 JVM_END | |
4011 | |
4012 | |
4013 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which)) | |
4014 JVMWrapper("JVM_GetClassMethod"); | |
4015 JvmtiVMObjectAllocEventCollector oam; | |
4016 if (name == NULL) { | |
4017 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
4018 } | |
4019 Handle str (THREAD, JNIHandles::resolve_non_null(name)); | |
4020 | |
4021 const char* cstr = java_lang_String::as_utf8_string(str()); | |
4022 symbolHandle method_name = | |
4023 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); | |
4024 if (method_name.is_null()) { | |
4025 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
4026 } | |
4027 | |
4028 oop mirror = JNIHandles::resolve_non_null(cls); | |
4029 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); | |
4030 oop result = Reflection::reflect_method(mirror, method_name, tarray, | |
4031 which, CHECK_NULL); | |
4032 if (result == NULL) { | |
4033 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
4034 } | |
4035 return JNIHandles::make_local(env, result); | |
4036 JVM_END | |
4037 | |
4038 | |
4039 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which)) | |
4040 JVMWrapper("JVM_GetClassConstructor"); | |
4041 JvmtiVMObjectAllocEventCollector oam; | |
4042 oop mirror = JNIHandles::resolve_non_null(cls); | |
4043 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); | |
4044 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL); | |
4045 if (result == NULL) { | |
4046 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
4047 } | |
4048 return (jobject) JNIHandles::make_local(env, result); | |
4049 JVM_END | |
4050 | |
4051 | |
4052 // Instantiation /////////////////////////////////////////////////////////////////////////////// | |
4053 | |
4054 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls)) | |
4055 JVMWrapper("JVM_NewInstance"); | |
4056 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls)); | |
4057 | |
4058 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror()); | |
4059 if (resolved_constructor == NULL) { | |
4060 klassOop k = java_lang_Class::as_klassOop(mirror()); | |
4061 // The java.lang.Class object caches a resolved constructor if all the checks | |
4062 // below were done successfully and a constructor was found. | |
4063 | |
4064 // Do class based checks | |
4065 if (java_lang_Class::is_primitive(mirror())) { | |
4066 const char* msg = ""; | |
4067 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean"; | |
4068 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character"; | |
4069 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float"; | |
4070 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double"; | |
4071 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte"; | |
4072 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short"; | |
4073 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer"; | |
4074 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long"; | |
4075 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg); | |
4076 } | |
4077 | |
4078 // Check whether we are allowed to instantiate this class | |
4079 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here | |
4080 instanceKlassHandle klass(THREAD, k); | |
4081 // Make sure class is initialized (also so all methods are rewritten) | |
4082 klass->initialize(CHECK_NULL); | |
4083 | |
4084 // Lookup default constructor | |
4085 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature()); | |
4086 if (resolved_constructor == NULL) { | |
4087 ResourceMark rm(THREAD); | |
4088 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name()); | |
4089 } | |
4090 | |
4091 // Cache result in java.lang.Class object. Does not have to be MT safe. | |
4092 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor); | |
4093 } | |
4094 | |
4095 assert(resolved_constructor != NULL, "sanity check"); | |
4096 methodHandle constructor = methodHandle(THREAD, resolved_constructor); | |
4097 | |
4098 // We have an initialized instanceKlass with a default constructor | |
4099 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
4100 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check"); | |
4101 | |
4102 // Do security check | |
4103 klassOop caller_klass = NULL; | |
4104 if (UsePrivilegedStack) { | |
4105 caller_klass = thread->security_get_caller_class(2); | |
4106 | |
4107 if (!Reflection::verify_class_access(caller_klass, klass(), false) || | |
4108 !Reflection::verify_field_access(caller_klass, | |
4109 klass(), | |
4110 klass(), | |
4111 constructor->access_flags(), | |
4112 false, | |
4113 true)) { | |
4114 ResourceMark rm(THREAD); | |
4115 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name()); | |
4116 } | |
4117 } | |
4118 | |
4119 // Allocate object and call constructor | |
4120 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); | |
4121 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL); | |
4122 | |
4123 jobject res = JNIHandles::make_local(env, receiver()); | |
4124 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4125 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver()); | |
4126 } | |
4127 return res; | |
4128 JVM_END | |
4129 | |
4130 | |
4131 // Field //////////////////////////////////////////////////////////////////////////////////////////// | |
4132 | |
4133 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj)) | |
4134 JVMWrapper("JVM_GetField"); | |
4135 JvmtiVMObjectAllocEventCollector oam; | |
4136 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4137 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4138 fieldDescriptor fd; | |
4139 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL); | |
4140 jvalue value; | |
4141 BasicType type = Reflection::field_get(&value, &fd, receiver); | |
4142 oop box = Reflection::box(&value, type, CHECK_NULL); | |
4143 return JNIHandles::make_local(env, box); | |
4144 JVM_END | |
4145 | |
4146 | |
4147 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode)) | |
4148 JVMWrapper("JVM_GetPrimitiveField"); | |
4149 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4150 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4151 fieldDescriptor fd; | |
4152 jvalue value; | |
4153 value.j = 0; | |
4154 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value)); | |
4155 BasicType type = Reflection::field_get(&value, &fd, receiver); | |
4156 BasicType wide_type = (BasicType) wCode; | |
4157 if (type != wide_type) { | |
4158 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
4159 } | |
4160 return value; | |
4161 JVM_END // should really be JVM_END, but that doesn't work for union types! | |
4162 | |
4163 | |
4164 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val)) | |
4165 JVMWrapper("JVM_SetField"); | |
4166 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4167 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4168 oop box = JNIHandles::resolve(val); | |
4169 fieldDescriptor fd; | |
4170 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); | |
4171 BasicType field_type = fd.field_type(); | |
4172 jvalue value; | |
4173 BasicType value_type; | |
4174 if (field_type == T_OBJECT || field_type == T_ARRAY) { | |
4175 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
4176 value_type = Reflection::unbox_for_regular_object(box, &value); | |
4177 Reflection::field_set(&value, &fd, receiver, field_type, CHECK); | |
4178 } else { | |
4179 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
4180 Reflection::field_set(&value, &fd, receiver, value_type, CHECK); | |
4181 } | |
4182 JVM_END | |
4183 | |
4184 | |
4185 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode)) | |
4186 JVMWrapper("JVM_SetPrimitiveField"); | |
4187 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4188 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4189 fieldDescriptor fd; | |
4190 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); | |
4191 BasicType value_type = (BasicType) vCode; | |
4192 Reflection::field_set(&v, &fd, receiver, value_type, CHECK); | |
4193 JVM_END | |
4194 | |
4195 | |
4196 // Method /////////////////////////////////////////////////////////////////////////////////////////// | |
4197 | |
4198 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) | |
4199 JVMWrapper("JVM_InvokeMethod"); | |
4200 Handle method_handle; | |
4201 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { | |
4202 method_handle = Handle(THREAD, JNIHandles::resolve(method)); | |
4203 Handle receiver(THREAD, JNIHandles::resolve(obj)); | |
4204 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4205 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); | |
4206 jobject res = JNIHandles::make_local(env, result); | |
4207 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4208 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); | |
4209 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); | |
4210 if (java_lang_Class::is_primitive(ret_type)) { | |
4211 // Only for primitive type vm allocates memory for java object. | |
4212 // See box() method. | |
4213 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4214 } | |
4215 } | |
4216 return res; | |
4217 } else { | |
4218 THROW_0(vmSymbols::java_lang_StackOverflowError()); | |
4219 } | |
4220 JVM_END | |
4221 | |
4222 | |
4223 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) | |
4224 JVMWrapper("JVM_NewInstanceFromConstructor"); | |
4225 oop constructor_mirror = JNIHandles::resolve(c); | |
4226 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4227 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); | |
4228 jobject res = JNIHandles::make_local(env, result); | |
4229 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4230 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4231 } | |
4232 return res; | |
4233 JVM_END | |
4234 | |
4235 #endif /* SUPPORT_OLD_REFLECTION */ | |
4236 | |
4237 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// | |
4238 | |
4239 JVM_LEAF(jboolean, JVM_SupportsCX8()) | |
4240 JVMWrapper("JVM_SupportsCX8"); | |
4241 return VM_Version::supports_cx8(); | |
4242 JVM_END | |
4243 | |
4244 | |
4245 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) | |
4246 JVMWrapper("JVM_CX8Field"); | |
4247 jlong res; | |
4248 oop o = JNIHandles::resolve(obj); | |
4249 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
4250 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); | |
4251 | |
4252 assert(VM_Version::supports_cx8(), "cx8 not supported"); | |
4253 res = Atomic::cmpxchg(newVal, addr, oldVal); | |
4254 | |
4255 return res == oldVal; | |
4256 JVM_END | |
4257 | |
116
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4258 // DTrace /////////////////////////////////////////////////////////////////// |
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4259 |
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4260 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) |
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4261 JVMWrapper("JVM_DTraceGetVersion"); |
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4262 return (jint)JVM_TRACING_DTRACE_VERSION; |
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4263 JVM_END |
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4264 |
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4265 JVM_ENTRY(jlong,JVM_DTraceActivate( |
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4266 JNIEnv* env, jint version, jstring module_name, jint providers_count, |
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4267 JVM_DTraceProvider* providers)) |
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4268 JVMWrapper("JVM_DTraceActivate"); |
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4269 return DTraceJSDT::activate( |
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4270 version, module_name, providers_count, providers, CHECK_0); |
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4271 JVM_END |
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4272 |
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4273 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) |
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4274 JVMWrapper("JVM_DTraceIsProbeEnabled"); |
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4275 return DTraceJSDT::is_probe_enabled(method); |
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4276 JVM_END |
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4277 |
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4278 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) |
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4279 JVMWrapper("JVM_DTraceDispose"); |
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4280 DTraceJSDT::dispose(handle); |
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4281 JVM_END |
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4282 |
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4283 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) |
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4284 JVMWrapper("JVM_DTraceIsSupported"); |
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4285 return DTraceJSDT::is_supported(); |
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4286 JVM_END |
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4287 |
0 | 4288 // Returns an array of all live Thread objects (VM internal JavaThreads, |
4289 // jvmti agent threads, and JNI attaching threads are skipped) | |
4290 // See CR 6404306 regarding JNI attaching threads | |
4291 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) | |
4292 ResourceMark rm(THREAD); | |
4293 ThreadsListEnumerator tle(THREAD, false, false); | |
4294 JvmtiVMObjectAllocEventCollector oam; | |
4295 | |
4296 int num_threads = tle.num_threads(); | |
4297 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL); | |
4298 objArrayHandle threads_ah(THREAD, r); | |
4299 | |
4300 for (int i = 0; i < num_threads; i++) { | |
4301 Handle h = tle.get_threadObj(i); | |
4302 threads_ah->obj_at_put(i, h()); | |
4303 } | |
4304 | |
4305 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); | |
4306 JVM_END | |
4307 | |
4308 | |
4309 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods | |
4310 // Return StackTraceElement[][], each element is the stack trace of a thread in | |
4311 // the corresponding entry in the given threads array | |
4312 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) | |
4313 JVMWrapper("JVM_DumpThreads"); | |
4314 JvmtiVMObjectAllocEventCollector oam; | |
4315 | |
4316 // Check if threads is null | |
4317 if (threads == NULL) { | |
4318 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4319 } | |
4320 | |
4321 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); | |
4322 objArrayHandle ah(THREAD, a); | |
4323 int num_threads = ah->length(); | |
4324 // check if threads is non-empty array | |
4325 if (num_threads == 0) { | |
4326 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4327 } | |
4328 | |
4329 // check if threads is not an array of objects of Thread class | |
4330 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); | |
4331 if (k != SystemDictionary::thread_klass()) { | |
4332 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4333 } | |
4334 | |
4335 ResourceMark rm(THREAD); | |
4336 | |
4337 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
4338 for (int i = 0; i < num_threads; i++) { | |
4339 oop thread_obj = ah->obj_at(i); | |
4340 instanceHandle h(THREAD, (instanceOop) thread_obj); | |
4341 thread_handle_array->append(h); | |
4342 } | |
4343 | |
4344 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); | |
4345 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); | |
4346 | |
4347 JVM_END | |
4348 | |
4349 // JVM monitoring and management support | |
4350 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) | |
4351 return Management::get_jmm_interface(version); | |
4352 JVM_END | |
4353 | |
4354 // com.sun.tools.attach.VirtualMachine agent properties support | |
4355 // | |
4356 // Initialize the agent properties with the properties maintained in the VM | |
4357 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) | |
4358 JVMWrapper("JVM_InitAgentProperties"); | |
4359 ResourceMark rm; | |
4360 | |
4361 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
4362 | |
4363 PUTPROP(props, "sun.java.command", Arguments::java_command()); | |
4364 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); | |
4365 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); | |
4366 return properties; | |
4367 JVM_END | |
4368 | |
4369 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) | |
4370 { | |
4371 JVMWrapper("JVM_GetEnclosingMethodInfo"); | |
4372 JvmtiVMObjectAllocEventCollector oam; | |
4373 | |
4374 if (ofClass == NULL) { | |
4375 return NULL; | |
4376 } | |
4377 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); | |
4378 // Special handling for primitive objects | |
4379 if (java_lang_Class::is_primitive(mirror())) { | |
4380 return NULL; | |
4381 } | |
4382 klassOop k = java_lang_Class::as_klassOop(mirror()); | |
4383 if (!Klass::cast(k)->oop_is_instance()) { | |
4384 return NULL; | |
4385 } | |
4386 instanceKlassHandle ik_h(THREAD, k); | |
4387 int encl_method_class_idx = ik_h->enclosing_method_class_index(); | |
4388 if (encl_method_class_idx == 0) { | |
4389 return NULL; | |
4390 } | |
4391 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL); | |
4392 objArrayHandle dest(THREAD, dest_o); | |
4393 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); | |
4394 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); | |
4395 int encl_method_method_idx = ik_h->enclosing_method_method_index(); | |
4396 if (encl_method_method_idx != 0) { | |
4397 symbolOop sym_o = ik_h->constants()->symbol_at( | |
4398 extract_low_short_from_int( | |
4399 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4400 symbolHandle sym(THREAD, sym_o); | |
4401 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4402 dest->obj_at_put(1, str()); | |
4403 sym_o = ik_h->constants()->symbol_at( | |
4404 extract_high_short_from_int( | |
4405 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4406 sym = symbolHandle(THREAD, sym_o); | |
4407 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4408 dest->obj_at_put(2, str()); | |
4409 } | |
4410 return (jobjectArray) JNIHandles::make_local(dest()); | |
4411 } | |
4412 JVM_END | |
4413 | |
4414 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, | |
4415 jint javaThreadState)) | |
4416 { | |
4417 // If new thread states are added in future JDK and VM versions, | |
4418 // this should check if the JDK version is compatible with thread | |
4419 // states supported by the VM. Return NULL if not compatible. | |
4420 // | |
4421 // This function must map the VM java_lang_Thread::ThreadStatus | |
4422 // to the Java thread state that the JDK supports. | |
4423 // | |
4424 | |
4425 typeArrayHandle values_h; | |
4426 switch (javaThreadState) { | |
4427 case JAVA_THREAD_STATE_NEW : { | |
4428 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4429 values_h = typeArrayHandle(THREAD, r); | |
4430 values_h->int_at_put(0, java_lang_Thread::NEW); | |
4431 break; | |
4432 } | |
4433 case JAVA_THREAD_STATE_RUNNABLE : { | |
4434 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4435 values_h = typeArrayHandle(THREAD, r); | |
4436 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); | |
4437 break; | |
4438 } | |
4439 case JAVA_THREAD_STATE_BLOCKED : { | |
4440 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4441 values_h = typeArrayHandle(THREAD, r); | |
4442 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); | |
4443 break; | |
4444 } | |
4445 case JAVA_THREAD_STATE_WAITING : { | |
4446 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); | |
4447 values_h = typeArrayHandle(THREAD, r); | |
4448 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); | |
4449 values_h->int_at_put(1, java_lang_Thread::PARKED); | |
4450 break; | |
4451 } | |
4452 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4453 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); | |
4454 values_h = typeArrayHandle(THREAD, r); | |
4455 values_h->int_at_put(0, java_lang_Thread::SLEEPING); | |
4456 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); | |
4457 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); | |
4458 break; | |
4459 } | |
4460 case JAVA_THREAD_STATE_TERMINATED : { | |
4461 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4462 values_h = typeArrayHandle(THREAD, r); | |
4463 values_h->int_at_put(0, java_lang_Thread::TERMINATED); | |
4464 break; | |
4465 } | |
4466 default: | |
4467 // Unknown state - probably incompatible JDK version | |
4468 return NULL; | |
4469 } | |
4470 | |
4471 return (jintArray) JNIHandles::make_local(env, values_h()); | |
4472 } | |
4473 JVM_END | |
4474 | |
4475 | |
4476 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, | |
4477 jint javaThreadState, | |
4478 jintArray values)) | |
4479 { | |
4480 // If new thread states are added in future JDK and VM versions, | |
4481 // this should check if the JDK version is compatible with thread | |
4482 // states supported by the VM. Return NULL if not compatible. | |
4483 // | |
4484 // This function must map the VM java_lang_Thread::ThreadStatus | |
4485 // to the Java thread state that the JDK supports. | |
4486 // | |
4487 | |
4488 ResourceMark rm; | |
4489 | |
4490 // Check if threads is null | |
4491 if (values == NULL) { | |
4492 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4493 } | |
4494 | |
4495 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); | |
4496 typeArrayHandle values_h(THREAD, v); | |
4497 | |
4498 objArrayHandle names_h; | |
4499 switch (javaThreadState) { | |
4500 case JAVA_THREAD_STATE_NEW : { | |
4501 assert(values_h->length() == 1 && | |
4502 values_h->int_at(0) == java_lang_Thread::NEW, | |
4503 "Invalid threadStatus value"); | |
4504 | |
4505 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4506 1, /* only 1 substate */ | |
4507 CHECK_NULL); | |
4508 names_h = objArrayHandle(THREAD, r); | |
4509 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); | |
4510 names_h->obj_at_put(0, name()); | |
4511 break; | |
4512 } | |
4513 case JAVA_THREAD_STATE_RUNNABLE : { | |
4514 assert(values_h->length() == 1 && | |
4515 values_h->int_at(0) == java_lang_Thread::RUNNABLE, | |
4516 "Invalid threadStatus value"); | |
4517 | |
4518 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4519 1, /* only 1 substate */ | |
4520 CHECK_NULL); | |
4521 names_h = objArrayHandle(THREAD, r); | |
4522 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); | |
4523 names_h->obj_at_put(0, name()); | |
4524 break; | |
4525 } | |
4526 case JAVA_THREAD_STATE_BLOCKED : { | |
4527 assert(values_h->length() == 1 && | |
4528 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, | |
4529 "Invalid threadStatus value"); | |
4530 | |
4531 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4532 1, /* only 1 substate */ | |
4533 CHECK_NULL); | |
4534 names_h = objArrayHandle(THREAD, r); | |
4535 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); | |
4536 names_h->obj_at_put(0, name()); | |
4537 break; | |
4538 } | |
4539 case JAVA_THREAD_STATE_WAITING : { | |
4540 assert(values_h->length() == 2 && | |
4541 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && | |
4542 values_h->int_at(1) == java_lang_Thread::PARKED, | |
4543 "Invalid threadStatus value"); | |
4544 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4545 2, /* number of substates */ | |
4546 CHECK_NULL); | |
4547 names_h = objArrayHandle(THREAD, r); | |
4548 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", | |
4549 CHECK_NULL); | |
4550 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", | |
4551 CHECK_NULL); | |
4552 names_h->obj_at_put(0, name0()); | |
4553 names_h->obj_at_put(1, name1()); | |
4554 break; | |
4555 } | |
4556 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4557 assert(values_h->length() == 3 && | |
4558 values_h->int_at(0) == java_lang_Thread::SLEEPING && | |
4559 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && | |
4560 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, | |
4561 "Invalid threadStatus value"); | |
4562 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4563 3, /* number of substates */ | |
4564 CHECK_NULL); | |
4565 names_h = objArrayHandle(THREAD, r); | |
4566 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", | |
4567 CHECK_NULL); | |
4568 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", | |
4569 CHECK_NULL); | |
4570 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", | |
4571 CHECK_NULL); | |
4572 names_h->obj_at_put(0, name0()); | |
4573 names_h->obj_at_put(1, name1()); | |
4574 names_h->obj_at_put(2, name2()); | |
4575 break; | |
4576 } | |
4577 case JAVA_THREAD_STATE_TERMINATED : { | |
4578 assert(values_h->length() == 1 && | |
4579 values_h->int_at(0) == java_lang_Thread::TERMINATED, | |
4580 "Invalid threadStatus value"); | |
4581 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
4582 1, /* only 1 substate */ | |
4583 CHECK_NULL); | |
4584 names_h = objArrayHandle(THREAD, r); | |
4585 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); | |
4586 names_h->obj_at_put(0, name()); | |
4587 break; | |
4588 } | |
4589 default: | |
4590 // Unknown state - probably incompatible JDK version | |
4591 return NULL; | |
4592 } | |
4593 return (jobjectArray) JNIHandles::make_local(env, names_h()); | |
4594 } | |
4595 JVM_END | |
4596 | |
4597 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) | |
4598 { | |
4599 memset(info, 0, sizeof(info_size)); | |
4600 | |
4601 info->jvm_version = Abstract_VM_Version::jvm_version(); | |
4602 info->update_version = 0; /* 0 in HotSpot Express VM */ | |
4603 info->special_update_version = 0; /* 0 in HotSpot Express VM */ | |
4604 | |
4605 // when we add a new capability in the jvm_version_info struct, we should also | |
4606 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat | |
4607 // counter defined in runtimeService.cpp. | |
4608 info->is_attachable = AttachListener::is_attach_supported(); | |
4609 #ifdef KERNEL | |
4610 info->is_kernel_jvm = 1; // true; | |
4611 #else // KERNEL | |
4612 info->is_kernel_jvm = 0; // false; | |
4613 #endif // KERNEL | |
4614 } | |
4615 JVM_END | |
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018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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