Mercurial > hg > graal-compiler
annotate src/share/vm/prims/jvm.cpp @ 2142:8012aa3ccede
4926272: methodOopDesc::method_from_bcp is unsafe
Reviewed-by: coleenp, jrose, kvn, dcubed
author | never |
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date | Thu, 13 Jan 2011 22:15:41 -0800 |
parents | 828eafbd85cc |
children | ccfcb502af3f |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/classLoader.hpp" | |
27 #include "classfile/javaAssertions.hpp" | |
28 #include "classfile/javaClasses.hpp" | |
29 #include "classfile/symbolTable.hpp" | |
30 #include "classfile/systemDictionary.hpp" | |
31 #include "classfile/vmSymbols.hpp" | |
32 #include "gc_interface/collectedHeap.inline.hpp" | |
33 #include "memory/oopFactory.hpp" | |
34 #include "memory/universe.inline.hpp" | |
35 #include "oops/instanceKlass.hpp" | |
36 #include "oops/objArrayKlass.hpp" | |
37 #include "prims/jvm.h" | |
38 #include "prims/jvm_misc.hpp" | |
39 #include "prims/jvmtiExport.hpp" | |
40 #include "prims/jvmtiThreadState.hpp" | |
41 #include "prims/nativeLookup.hpp" | |
42 #include "prims/privilegedStack.hpp" | |
43 #include "runtime/arguments.hpp" | |
44 #include "runtime/dtraceJSDT.hpp" | |
45 #include "runtime/handles.inline.hpp" | |
46 #include "runtime/init.hpp" | |
47 #include "runtime/interfaceSupport.hpp" | |
48 #include "runtime/java.hpp" | |
49 #include "runtime/javaCalls.hpp" | |
50 #include "runtime/jfieldIDWorkaround.hpp" | |
51 #include "runtime/os.hpp" | |
52 #include "runtime/perfData.hpp" | |
53 #include "runtime/reflection.hpp" | |
54 #include "runtime/vframe.hpp" | |
55 #include "runtime/vm_operations.hpp" | |
56 #include "services/attachListener.hpp" | |
57 #include "services/management.hpp" | |
58 #include "services/threadService.hpp" | |
59 #include "utilities/copy.hpp" | |
60 #include "utilities/defaultStream.hpp" | |
61 #include "utilities/dtrace.hpp" | |
62 #include "utilities/events.hpp" | |
63 #include "utilities/histogram.hpp" | |
64 #include "utilities/top.hpp" | |
65 #include "utilities/utf8.hpp" | |
66 #ifdef TARGET_OS_FAMILY_linux | |
67 # include "jvm_linux.h" | |
68 #endif | |
69 #ifdef TARGET_OS_FAMILY_solaris | |
70 # include "jvm_solaris.h" | |
71 #endif | |
72 #ifdef TARGET_OS_FAMILY_windows | |
73 # include "jvm_windows.h" | |
74 #endif | |
75 | |
0 | 76 #include <errno.h> |
77 | |
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78 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); |
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79 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); |
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80 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); |
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81 |
0 | 82 /* |
83 NOTE about use of any ctor or function call that can trigger a safepoint/GC: | |
84 such ctors and calls MUST NOT come between an oop declaration/init and its | |
85 usage because if objects are move this may cause various memory stomps, bus | |
86 errors and segfaults. Here is a cookbook for causing so called "naked oop | |
87 failures": | |
88 | |
89 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { | |
90 JVMWrapper("JVM_GetClassDeclaredFields"); | |
91 | |
92 // Object address to be held directly in mirror & not visible to GC | |
93 oop mirror = JNIHandles::resolve_non_null(ofClass); | |
94 | |
95 // If this ctor can hit a safepoint, moving objects around, then | |
96 ComplexConstructor foo; | |
97 | |
98 // Boom! mirror may point to JUNK instead of the intended object | |
99 (some dereference of mirror) | |
100 | |
101 // Here's another call that may block for GC, making mirror stale | |
102 MutexLocker ml(some_lock); | |
103 | |
104 // And here's an initializer that can result in a stale oop | |
105 // all in one step. | |
106 oop o = call_that_can_throw_exception(TRAPS); | |
107 | |
108 | |
109 The solution is to keep the oop declaration BELOW the ctor or function | |
110 call that might cause a GC, do another resolve to reassign the oop, or | |
111 consider use of a Handle instead of an oop so there is immunity from object | |
112 motion. But note that the "QUICK" entries below do not have a handlemark | |
113 and thus can only support use of handles passed in. | |
114 */ | |
115 | |
116 static void trace_class_resolution_impl(klassOop to_class, TRAPS) { | |
117 ResourceMark rm; | |
118 int line_number = -1; | |
119 const char * source_file = NULL; | |
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120 const char * trace = "explicit"; |
0 | 121 klassOop caller = NULL; |
122 JavaThread* jthread = JavaThread::current(); | |
123 if (jthread->has_last_Java_frame()) { | |
124 vframeStream vfst(jthread); | |
125 | |
126 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames | |
127 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK); | |
128 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); | |
129 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK); | |
130 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); | |
131 | |
132 methodOop last_caller = NULL; | |
133 | |
134 while (!vfst.at_end()) { | |
135 methodOop m = vfst.method(); | |
1142 | 136 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& |
0 | 137 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && |
138 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { | |
139 break; | |
140 } | |
141 last_caller = m; | |
142 vfst.next(); | |
143 } | |
144 // if this is called from Class.forName0 and that is called from Class.forName, | |
145 // then print the caller of Class.forName. If this is Class.loadClass, then print | |
146 // that caller, otherwise keep quiet since this should be picked up elsewhere. | |
147 bool found_it = false; | |
148 if (!vfst.at_end() && | |
149 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
150 vfst.method()->name() == vmSymbols::forName0_name()) { | |
151 vfst.next(); | |
152 if (!vfst.at_end() && | |
153 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && | |
154 vfst.method()->name() == vmSymbols::forName_name()) { | |
155 vfst.next(); | |
156 found_it = true; | |
157 } | |
158 } else if (last_caller != NULL && | |
159 instanceKlass::cast(last_caller->method_holder())->name() == | |
160 vmSymbols::java_lang_ClassLoader() && | |
161 (last_caller->name() == vmSymbols::loadClassInternal_name() || | |
162 last_caller->name() == vmSymbols::loadClass_name())) { | |
163 found_it = true; | |
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164 } else if (!vfst.at_end()) { |
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165 if (vfst.method()->is_native()) { |
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166 // JNI call |
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167 found_it = true; |
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168 } |
0 | 169 } |
170 if (found_it && !vfst.at_end()) { | |
171 // found the caller | |
172 caller = vfst.method()->method_holder(); | |
173 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
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174 if (line_number == -1) { |
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175 // show method name if it's a native method |
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176 trace = vfst.method()->name_and_sig_as_C_string(); |
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177 } |
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178 symbolOop s = instanceKlass::cast(caller)->source_file_name(); |
0 | 179 if (s != NULL) { |
180 source_file = s->as_C_string(); | |
181 } | |
182 } | |
183 } | |
184 if (caller != NULL) { | |
185 if (to_class != caller) { | |
186 const char * from = Klass::cast(caller)->external_name(); | |
187 const char * to = Klass::cast(to_class)->external_name(); | |
188 // print in a single call to reduce interleaving between threads | |
189 if (source_file != NULL) { | |
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190 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); |
0 | 191 } else { |
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192 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); |
0 | 193 } |
194 } | |
195 } | |
196 } | |
197 | |
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198 void trace_class_resolution(klassOop to_class) { |
0 | 199 EXCEPTION_MARK; |
200 trace_class_resolution_impl(to_class, THREAD); | |
201 if (HAS_PENDING_EXCEPTION) { | |
202 CLEAR_PENDING_EXCEPTION; | |
203 } | |
204 } | |
205 | |
206 // Wrapper to trace JVM functions | |
207 | |
208 #ifdef ASSERT | |
209 class JVMTraceWrapper : public StackObj { | |
210 public: | |
211 JVMTraceWrapper(const char* format, ...) { | |
212 if (TraceJVMCalls) { | |
213 va_list ap; | |
214 va_start(ap, format); | |
215 tty->print("JVM "); | |
216 tty->vprint_cr(format, ap); | |
217 va_end(ap); | |
218 } | |
219 } | |
220 }; | |
221 | |
222 Histogram* JVMHistogram; | |
223 volatile jint JVMHistogram_lock = 0; | |
224 | |
225 class JVMHistogramElement : public HistogramElement { | |
226 public: | |
227 JVMHistogramElement(const char* name); | |
228 }; | |
229 | |
230 JVMHistogramElement::JVMHistogramElement(const char* elementName) { | |
231 _name = elementName; | |
232 uintx count = 0; | |
233 | |
234 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { | |
235 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { | |
236 count +=1; | |
237 if ( (WarnOnStalledSpinLock > 0) | |
238 && (count % WarnOnStalledSpinLock == 0)) { | |
239 warning("JVMHistogram_lock seems to be stalled"); | |
240 } | |
241 } | |
242 } | |
243 | |
244 if(JVMHistogram == NULL) | |
245 JVMHistogram = new Histogram("JVM Call Counts",100); | |
246 | |
247 JVMHistogram->add_element(this); | |
248 Atomic::dec(&JVMHistogram_lock); | |
249 } | |
250 | |
251 #define JVMCountWrapper(arg) \ | |
252 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ | |
253 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! | |
254 | |
255 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) | |
256 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) | |
257 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) | |
258 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) | |
259 #else | |
260 #define JVMWrapper(arg1) | |
261 #define JVMWrapper2(arg1, arg2) | |
262 #define JVMWrapper3(arg1, arg2, arg3) | |
263 #define JVMWrapper4(arg1, arg2, arg3, arg4) | |
264 #endif | |
265 | |
266 | |
267 // Interface version ///////////////////////////////////////////////////////////////////// | |
268 | |
269 | |
270 JVM_LEAF(jint, JVM_GetInterfaceVersion()) | |
271 return JVM_INTERFACE_VERSION; | |
272 JVM_END | |
273 | |
274 | |
275 // java.lang.System ////////////////////////////////////////////////////////////////////// | |
276 | |
277 | |
278 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) | |
279 JVMWrapper("JVM_CurrentTimeMillis"); | |
280 return os::javaTimeMillis(); | |
281 JVM_END | |
282 | |
283 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) | |
284 JVMWrapper("JVM_NanoTime"); | |
285 return os::javaTimeNanos(); | |
286 JVM_END | |
287 | |
288 | |
289 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, | |
290 jobject dst, jint dst_pos, jint length)) | |
291 JVMWrapper("JVM_ArrayCopy"); | |
292 // Check if we have null pointers | |
293 if (src == NULL || dst == NULL) { | |
294 THROW(vmSymbols::java_lang_NullPointerException()); | |
295 } | |
296 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); | |
297 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); | |
298 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); | |
299 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); | |
300 // Do copy | |
301 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); | |
302 JVM_END | |
303 | |
304 | |
305 static void set_property(Handle props, const char* key, const char* value, TRAPS) { | |
306 JavaValue r(T_OBJECT); | |
307 // public synchronized Object put(Object key, Object value); | |
308 HandleMark hm(THREAD); | |
309 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); | |
310 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); | |
311 JavaCalls::call_virtual(&r, | |
312 props, | |
1142 | 313 KlassHandle(THREAD, SystemDictionary::Properties_klass()), |
0 | 314 vmSymbolHandles::put_name(), |
315 vmSymbolHandles::object_object_object_signature(), | |
316 key_str, | |
317 value_str, | |
318 THREAD); | |
319 } | |
320 | |
321 | |
322 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); | |
323 | |
324 | |
325 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) | |
326 JVMWrapper("JVM_InitProperties"); | |
327 ResourceMark rm; | |
328 | |
329 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
330 | |
331 // System property list includes both user set via -D option and | |
332 // jvm system specific properties. | |
333 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { | |
334 PUTPROP(props, p->key(), p->value()); | |
335 } | |
336 | |
337 // Convert the -XX:MaxDirectMemorySize= command line flag | |
338 // to the sun.nio.MaxDirectMemorySize property. | |
339 // Do this after setting user properties to prevent people | |
340 // from setting the value with a -D option, as requested. | |
341 { | |
342 char as_chars[256]; | |
343 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize); | |
344 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); | |
345 } | |
346 | |
347 // JVM monitoring and management support | |
348 // Add the sun.management.compiler property for the compiler's name | |
349 { | |
350 #undef CSIZE | |
351 #if defined(_LP64) || defined(_WIN64) | |
352 #define CSIZE "64-Bit " | |
353 #else | |
354 #define CSIZE | |
355 #endif // 64bit | |
356 | |
357 #ifdef TIERED | |
358 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; | |
359 #else | |
360 #if defined(COMPILER1) | |
361 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; | |
362 #elif defined(COMPILER2) | |
363 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; | |
364 #else | |
365 const char* compiler_name = ""; | |
366 #endif // compilers | |
367 #endif // TIERED | |
368 | |
369 if (*compiler_name != '\0' && | |
370 (Arguments::mode() != Arguments::_int)) { | |
371 PUTPROP(props, "sun.management.compiler", compiler_name); | |
372 } | |
373 } | |
374 | |
375 return properties; | |
376 JVM_END | |
377 | |
378 | |
379 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// | |
380 | |
381 extern volatile jint vm_created; | |
382 | |
383 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) | |
384 if (vm_created != 0 && (code == 0)) { | |
385 // The VM is about to exit. We call back into Java to check whether finalizers should be run | |
386 Universe::run_finalizers_on_exit(); | |
387 } | |
388 before_exit(thread); | |
389 vm_exit(code); | |
390 JVM_END | |
391 | |
392 | |
393 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) | |
394 before_exit(thread); | |
395 vm_exit(code); | |
396 JVM_END | |
397 | |
398 | |
399 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) | |
400 register_on_exit_function(func); | |
401 JVM_END | |
402 | |
403 | |
404 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) | |
405 JVMWrapper("JVM_GC"); | |
406 if (!DisableExplicitGC) { | |
407 Universe::heap()->collect(GCCause::_java_lang_system_gc); | |
408 } | |
409 JVM_END | |
410 | |
411 | |
412 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) | |
413 JVMWrapper("JVM_MaxObjectInspectionAge"); | |
414 return Universe::heap()->millis_since_last_gc(); | |
415 JVM_END | |
416 | |
417 | |
418 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) | |
419 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); | |
420 JVM_END | |
421 | |
422 | |
423 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) | |
424 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); | |
425 JVM_END | |
426 | |
427 static inline jlong convert_size_t_to_jlong(size_t val) { | |
428 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). | |
429 NOT_LP64 (return (jlong)val;) | |
430 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) | |
431 } | |
432 | |
433 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) | |
434 JVMWrapper("JVM_TotalMemory"); | |
435 size_t n = Universe::heap()->capacity(); | |
436 return convert_size_t_to_jlong(n); | |
437 JVM_END | |
438 | |
439 | |
440 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) | |
441 JVMWrapper("JVM_FreeMemory"); | |
442 CollectedHeap* ch = Universe::heap(); | |
342
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443 size_t n; |
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444 { |
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445 MutexLocker x(Heap_lock); |
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446 n = ch->capacity() - ch->used(); |
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447 } |
0 | 448 return convert_size_t_to_jlong(n); |
449 JVM_END | |
450 | |
451 | |
452 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) | |
453 JVMWrapper("JVM_MaxMemory"); | |
454 size_t n = Universe::heap()->max_capacity(); | |
455 return convert_size_t_to_jlong(n); | |
456 JVM_END | |
457 | |
458 | |
459 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) | |
460 JVMWrapper("JVM_ActiveProcessorCount"); | |
461 return os::active_processor_count(); | |
462 JVM_END | |
463 | |
464 | |
465 | |
466 // java.lang.Throwable ////////////////////////////////////////////////////// | |
467 | |
468 | |
469 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) | |
470 JVMWrapper("JVM_FillInStackTrace"); | |
471 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); | |
472 java_lang_Throwable::fill_in_stack_trace(exception); | |
473 JVM_END | |
474 | |
475 | |
476 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) | |
477 JVMWrapper("JVM_PrintStackTrace"); | |
478 // Note: This is no longer used in Merlin, but we still support it for compatibility. | |
479 oop exception = JNIHandles::resolve_non_null(receiver); | |
480 oop stream = JNIHandles::resolve_non_null(printable); | |
481 java_lang_Throwable::print_stack_trace(exception, stream); | |
482 JVM_END | |
483 | |
484 | |
485 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) | |
486 JVMWrapper("JVM_GetStackTraceDepth"); | |
487 oop exception = JNIHandles::resolve(throwable); | |
488 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); | |
489 JVM_END | |
490 | |
491 | |
492 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) | |
493 JVMWrapper("JVM_GetStackTraceElement"); | |
494 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC | |
495 oop exception = JNIHandles::resolve(throwable); | |
496 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); | |
497 return JNIHandles::make_local(env, element); | |
498 JVM_END | |
499 | |
500 | |
501 // java.lang.Object /////////////////////////////////////////////// | |
502 | |
503 | |
504 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) | |
505 JVMWrapper("JVM_IHashCode"); | |
506 // as implemented in the classic virtual machine; return 0 if object is NULL | |
507 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; | |
508 JVM_END | |
509 | |
510 | |
511 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) | |
512 JVMWrapper("JVM_MonitorWait"); | |
513 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
514 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); | |
515 JavaThreadInObjectWaitState jtiows(thread, ms != 0); | |
516 if (JvmtiExport::should_post_monitor_wait()) { | |
517 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); | |
518 } | |
519 ObjectSynchronizer::wait(obj, ms, CHECK); | |
520 JVM_END | |
521 | |
522 | |
523 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) | |
524 JVMWrapper("JVM_MonitorNotify"); | |
525 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
526 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); | |
527 ObjectSynchronizer::notify(obj, CHECK); | |
528 JVM_END | |
529 | |
530 | |
531 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) | |
532 JVMWrapper("JVM_MonitorNotifyAll"); | |
533 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
534 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); | |
535 ObjectSynchronizer::notifyall(obj, CHECK); | |
536 JVM_END | |
537 | |
538 | |
539 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) | |
540 JVMWrapper("JVM_Clone"); | |
541 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); | |
542 const KlassHandle klass (THREAD, obj->klass()); | |
543 JvmtiVMObjectAllocEventCollector oam; | |
544 | |
545 #ifdef ASSERT | |
546 // Just checking that the cloneable flag is set correct | |
547 if (obj->is_javaArray()) { | |
548 guarantee(klass->is_cloneable(), "all arrays are cloneable"); | |
549 } else { | |
550 guarantee(obj->is_instance(), "should be instanceOop"); | |
1142 | 551 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); |
0 | 552 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); |
553 } | |
554 #endif | |
555 | |
556 // Check if class of obj supports the Cloneable interface. | |
557 // All arrays are considered to be cloneable (See JLS 20.1.5) | |
558 if (!klass->is_cloneable()) { | |
559 ResourceMark rm(THREAD); | |
560 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); | |
561 } | |
562 | |
563 // Make shallow object copy | |
564 const int size = obj->size(); | |
565 oop new_obj = NULL; | |
566 if (obj->is_javaArray()) { | |
567 const int length = ((arrayOop)obj())->length(); | |
568 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); | |
569 } else { | |
570 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); | |
571 } | |
572 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread | |
573 // is modifying a reference field in the clonee, a non-oop-atomic copy might | |
574 // be suspended in the middle of copying the pointer and end up with parts | |
575 // of two different pointers in the field. Subsequent dereferences will crash. | |
576 // 4846409: an oop-copy of objects with long or double fields or arrays of same | |
577 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead | |
578 // of oops. We know objects are aligned on a minimum of an jlong boundary. | |
579 // The same is true of StubRoutines::object_copy and the various oop_copy | |
580 // variants, and of the code generated by the inline_native_clone intrinsic. | |
581 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); | |
582 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, | |
583 (size_t)align_object_size(size) / HeapWordsPerLong); | |
584 // Clear the header | |
585 new_obj->init_mark(); | |
586 | |
587 // Store check (mark entire object and let gc sort it out) | |
588 BarrierSet* bs = Universe::heap()->barrier_set(); | |
589 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); | |
590 bs->write_region(MemRegion((HeapWord*)new_obj, size)); | |
591 | |
592 // Caution: this involves a java upcall, so the clone should be | |
593 // "gc-robust" by this stage. | |
594 if (klass->has_finalizer()) { | |
595 assert(obj->is_instance(), "should be instanceOop"); | |
596 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); | |
597 } | |
598 | |
599 return JNIHandles::make_local(env, oop(new_obj)); | |
600 JVM_END | |
601 | |
602 // java.lang.Compiler //////////////////////////////////////////////////// | |
603 | |
604 // The initial cuts of the HotSpot VM will not support JITs, and all existing | |
605 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM | |
606 // functions are all silently ignored unless JVM warnings are printed. | |
607 | |
608 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) | |
609 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); | |
610 JVM_END | |
611 | |
612 | |
613 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) | |
614 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); | |
615 return JNI_FALSE; | |
616 JVM_END | |
617 | |
618 | |
619 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) | |
620 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); | |
621 return JNI_FALSE; | |
622 JVM_END | |
623 | |
624 | |
625 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) | |
626 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); | |
627 return JNI_FALSE; | |
628 JVM_END | |
629 | |
630 | |
631 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) | |
632 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); | |
633 return NULL; | |
634 JVM_END | |
635 | |
636 | |
637 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) | |
638 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); | |
639 JVM_END | |
640 | |
641 | |
642 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) | |
643 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); | |
644 JVM_END | |
645 | |
646 | |
647 | |
648 // Error message support ////////////////////////////////////////////////////// | |
649 | |
650 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) | |
651 JVMWrapper("JVM_GetLastErrorString"); | |
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652 return (jint)os::lasterror(buf, len); |
0 | 653 JVM_END |
654 | |
655 | |
656 // java.io.File /////////////////////////////////////////////////////////////// | |
657 | |
658 JVM_LEAF(char*, JVM_NativePath(char* path)) | |
659 JVMWrapper2("JVM_NativePath (%s)", path); | |
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660 return os::native_path(path); |
0 | 661 JVM_END |
662 | |
663 | |
664 // Misc. class handling /////////////////////////////////////////////////////////// | |
665 | |
666 | |
667 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) | |
668 JVMWrapper("JVM_GetCallerClass"); | |
669 klassOop k = thread->security_get_caller_class(depth); | |
670 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
671 JVM_END | |
672 | |
673 | |
674 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) | |
675 JVMWrapper("JVM_FindPrimitiveClass"); | |
676 oop mirror = NULL; | |
677 BasicType t = name2type(utf); | |
678 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { | |
679 mirror = Universe::java_mirror(t); | |
680 } | |
681 if (mirror == NULL) { | |
682 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); | |
683 } else { | |
684 return (jclass) JNIHandles::make_local(env, mirror); | |
685 } | |
686 JVM_END | |
687 | |
688 | |
689 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) | |
690 JVMWrapper("JVM_ResolveClass"); | |
691 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); | |
692 JVM_END | |
693 | |
878
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694 |
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695 // Returns a class loaded by the bootstrap class loader; or null |
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696 // if not found. ClassNotFoundException is not thrown. |
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697 // |
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698 // Rationale behind JVM_FindClassFromBootLoader |
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699 // a> JVM_FindClassFromClassLoader was never exported in the export tables. |
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700 // b> because of (a) java.dll has a direct dependecy on the unexported |
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701 // private symbol "_JVM_FindClassFromClassLoader@20". |
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702 // c> the launcher cannot use the private symbol as it dynamically opens |
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703 // the entry point, so if something changes, the launcher will fail |
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704 // unexpectedly at runtime, it is safest for the launcher to dlopen a |
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705 // stable exported interface. |
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706 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its |
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707 // signature to change from _JVM_FindClassFromClassLoader@20 to |
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708 // JVM_FindClassFromClassLoader and will not be backward compatible |
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709 // with older JDKs. |
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710 // Thus a public/stable exported entry point is the right solution, |
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711 // public here means public in linker semantics, and is exported only |
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712 // to the JDK, and is not intended to be a public API. |
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713 |
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714 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, |
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715 const char* name)) |
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716 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); |
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717 |
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718 // Java libraries should ensure that name is never null... |
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719 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { |
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720 // It's impossible to create this class; the name cannot fit |
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721 // into the constant pool. |
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722 return NULL; |
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723 } |
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724 |
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725 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); |
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726 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); |
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727 if (k == NULL) { |
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728 return NULL; |
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729 } |
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730 |
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731 if (TraceClassResolution) { |
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732 trace_class_resolution(k); |
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733 } |
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734 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); |
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735 JVM_END |
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736 |
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737 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, |
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738 jboolean init, jobject loader, |
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739 jboolean throwError)) |
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740 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, |
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741 throwError ? "error" : "exception"); |
388 | 742 // Java libraries should ensure that name is never null... |
743 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { | |
744 // It's impossible to create this class; the name cannot fit | |
745 // into the constant pool. | |
746 if (throwError) { | |
747 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
748 } else { | |
749 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); | |
750 } | |
751 } | |
752 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
753 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
754 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
755 Handle(), throwError, THREAD); | |
756 | |
757 if (TraceClassResolution && result != NULL) { | |
758 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); | |
759 } | |
760 return result; | |
0 | 761 JVM_END |
762 | |
763 | |
764 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, | |
765 jboolean init, jclass from)) | |
766 JVMWrapper2("JVM_FindClassFromClass %s", name); | |
767 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { | |
768 // It's impossible to create this class; the name cannot fit | |
769 // into the constant pool. | |
770 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
771 } | |
772 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); | |
773 oop from_class_oop = JNIHandles::resolve(from); | |
774 klassOop from_class = (from_class_oop == NULL) | |
775 ? (klassOop)NULL | |
776 : java_lang_Class::as_klassOop(from_class_oop); | |
777 oop class_loader = NULL; | |
778 oop protection_domain = NULL; | |
779 if (from_class != NULL) { | |
780 class_loader = Klass::cast(from_class)->class_loader(); | |
781 protection_domain = Klass::cast(from_class)->protection_domain(); | |
782 } | |
783 Handle h_loader(THREAD, class_loader); | |
784 Handle h_prot (THREAD, protection_domain); | |
785 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, | |
786 h_prot, true, thread); | |
787 | |
788 if (TraceClassResolution && result != NULL) { | |
789 // this function is generally only used for class loading during verification. | |
790 ResourceMark rm; | |
791 oop from_mirror = JNIHandles::resolve_non_null(from); | |
792 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); | |
793 const char * from_name = Klass::cast(from_class)->external_name(); | |
794 | |
795 oop mirror = JNIHandles::resolve_non_null(result); | |
796 klassOop to_class = java_lang_Class::as_klassOop(mirror); | |
797 const char * to = Klass::cast(to_class)->external_name(); | |
798 tty->print("RESOLVE %s %s (verification)\n", from_name, to); | |
799 } | |
800 | |
801 return result; | |
802 JVM_END | |
803 | |
804 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { | |
805 if (loader.is_null()) { | |
806 return; | |
807 } | |
808 | |
809 // check whether the current caller thread holds the lock or not. | |
810 // If not, increment the corresponding counter | |
811 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != | |
812 ObjectSynchronizer::owner_self) { | |
813 counter->inc(); | |
814 } | |
815 } | |
816 | |
817 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() | |
973
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818 // and JVM_DefineClassWithSourceCond() |
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819 static jclass jvm_define_class_common(JNIEnv *env, const char *name, |
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820 jobject loader, const jbyte *buf, |
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821 jsize len, jobject pd, const char *source, |
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822 jboolean verify, TRAPS) { |
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823 if (source == NULL) source = "__JVM_DefineClass__"; |
0 | 824 |
875
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825 assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
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826 JavaThread* jt = (JavaThread*) THREAD; |
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827 |
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828 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), |
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829 ClassLoader::perf_define_appclass_selftime(), |
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830 ClassLoader::perf_define_appclasses(), |
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831 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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832 jt->get_thread_stat()->perf_timers_addr(), |
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833 PerfClassTraceTime::DEFINE_CLASS); |
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834 |
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835 if (UsePerfData) { |
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836 ClassLoader::perf_app_classfile_bytes_read()->inc(len); |
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837 } |
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838 |
0 | 839 // Since exceptions can be thrown, class initialization can take place |
840 // if name is NULL no check for class name in .class stream has to be made. | |
841 symbolHandle class_name; | |
842 if (name != NULL) { | |
843 const int str_len = (int)strlen(name); | |
844 if (str_len > symbolOopDesc::max_length()) { | |
845 // It's impossible to create this class; the name cannot fit | |
846 // into the constant pool. | |
847 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); | |
848 } | |
849 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL); | |
850 } | |
851 | |
852 ResourceMark rm(THREAD); | |
853 ClassFileStream st((u1*) buf, len, (char *)source); | |
854 Handle class_loader (THREAD, JNIHandles::resolve(loader)); | |
855 if (UsePerfData) { | |
856 is_lock_held_by_thread(class_loader, | |
857 ClassLoader::sync_JVMDefineClassLockFreeCounter(), | |
858 THREAD); | |
859 } | |
860 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); | |
861 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, | |
862 protection_domain, &st, | |
973
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863 verify != 0, |
0 | 864 CHECK_NULL); |
865 | |
866 if (TraceClassResolution && k != NULL) { | |
867 trace_class_resolution(k); | |
868 } | |
869 | |
870 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
871 } | |
872 | |
873 | |
874 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) | |
875 JVMWrapper2("JVM_DefineClass %s", name); | |
876 | |
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877 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); |
0 | 878 JVM_END |
879 | |
880 | |
881 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) | |
882 JVMWrapper2("JVM_DefineClassWithSource %s", name); | |
883 | |
973
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884 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); |
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885 JVM_END |
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886 |
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887 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, |
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888 jobject loader, const jbyte *buf, |
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889 jsize len, jobject pd, |
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890 const char *source, jboolean verify)) |
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891 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); |
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892 |
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893 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); |
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894 JVM_END |
0 | 895 |
896 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) | |
897 JVMWrapper("JVM_FindLoadedClass"); | |
898 ResourceMark rm(THREAD); | |
899 | |
900 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
901 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); | |
902 | |
903 const char* str = java_lang_String::as_utf8_string(string()); | |
904 // Sanity check, don't expect null | |
905 if (str == NULL) return NULL; | |
906 | |
907 const int str_len = (int)strlen(str); | |
908 if (str_len > symbolOopDesc::max_length()) { | |
909 // It's impossible to create this class; the name cannot fit | |
910 // into the constant pool. | |
911 return NULL; | |
912 } | |
913 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL); | |
914 | |
915 // Security Note: | |
916 // The Java level wrapper will perform the necessary security check allowing | |
917 // us to pass the NULL as the initiating class loader. | |
918 Handle h_loader(THREAD, JNIHandles::resolve(loader)); | |
919 if (UsePerfData) { | |
920 is_lock_held_by_thread(h_loader, | |
921 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), | |
922 THREAD); | |
923 } | |
924 | |
925 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, | |
926 h_loader, | |
927 Handle(), | |
928 CHECK_NULL); | |
929 | |
930 return (k == NULL) ? NULL : | |
931 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); | |
932 JVM_END | |
933 | |
934 | |
935 // Reflection support ////////////////////////////////////////////////////////////////////////////// | |
936 | |
937 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) | |
938 assert (cls != NULL, "illegal class"); | |
939 JVMWrapper("JVM_GetClassName"); | |
940 JvmtiVMObjectAllocEventCollector oam; | |
941 ResourceMark rm(THREAD); | |
942 const char* name; | |
943 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
944 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); | |
945 } else { | |
946 // Consider caching interned string in Klass | |
947 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
948 assert(k->is_klass(), "just checking"); | |
949 name = Klass::cast(k)->external_name(); | |
950 } | |
951 oop result = StringTable::intern((char*) name, CHECK_NULL); | |
952 return (jstring) JNIHandles::make_local(env, result); | |
953 JVM_END | |
954 | |
955 | |
956 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) | |
957 JVMWrapper("JVM_GetClassInterfaces"); | |
958 JvmtiVMObjectAllocEventCollector oam; | |
959 oop mirror = JNIHandles::resolve_non_null(cls); | |
960 | |
961 // Special handling for primitive objects | |
962 if (java_lang_Class::is_primitive(mirror)) { | |
963 // Primitive objects does not have any interfaces | |
1142 | 964 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 965 return (jobjectArray) JNIHandles::make_local(env, r); |
966 } | |
967 | |
968 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); | |
969 // Figure size of result array | |
970 int size; | |
971 if (klass->oop_is_instance()) { | |
972 size = instanceKlass::cast(klass())->local_interfaces()->length(); | |
973 } else { | |
974 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); | |
975 size = 2; | |
976 } | |
977 | |
978 // Allocate result array | |
1142 | 979 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); |
0 | 980 objArrayHandle result (THREAD, r); |
981 // Fill in result | |
982 if (klass->oop_is_instance()) { | |
983 // Regular instance klass, fill in all local interfaces | |
984 for (int index = 0; index < size; index++) { | |
985 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); | |
986 result->obj_at_put(index, Klass::cast(k)->java_mirror()); | |
987 } | |
988 } else { | |
989 // All arrays implement java.lang.Cloneable and java.io.Serializable | |
1142 | 990 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror()); |
991 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror()); | |
0 | 992 } |
993 return (jobjectArray) JNIHandles::make_local(env, result()); | |
994 JVM_END | |
995 | |
996 | |
997 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) | |
998 JVMWrapper("JVM_GetClassLoader"); | |
999 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1000 return NULL; | |
1001 } | |
1002 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1003 oop loader = Klass::cast(k)->class_loader(); | |
1004 return JNIHandles::make_local(env, loader); | |
1005 JVM_END | |
1006 | |
1007 | |
1008 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) | |
1009 JVMWrapper("JVM_IsInterface"); | |
1010 oop mirror = JNIHandles::resolve_non_null(cls); | |
1011 if (java_lang_Class::is_primitive(mirror)) { | |
1012 return JNI_FALSE; | |
1013 } | |
1014 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1015 jboolean result = Klass::cast(k)->is_interface(); | |
1016 assert(!result || Klass::cast(k)->oop_is_instance(), | |
1017 "all interfaces are instance types"); | |
1018 // The compiler intrinsic for isInterface tests the | |
1019 // Klass::_access_flags bits in the same way. | |
1020 return result; | |
1021 JVM_END | |
1022 | |
1023 | |
1024 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) | |
1025 JVMWrapper("JVM_GetClassSigners"); | |
1026 JvmtiVMObjectAllocEventCollector oam; | |
1027 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1028 // There are no signers for primitive types | |
1029 return NULL; | |
1030 } | |
1031 | |
1032 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1033 objArrayOop signers = NULL; | |
1034 if (Klass::cast(k)->oop_is_instance()) { | |
1035 signers = instanceKlass::cast(k)->signers(); | |
1036 } | |
1037 | |
1038 // If there are no signers set in the class, or if the class | |
1039 // is an array, return NULL. | |
1040 if (signers == NULL) return NULL; | |
1041 | |
1042 // copy of the signers array | |
1043 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); | |
1044 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); | |
1045 for (int index = 0; index < signers->length(); index++) { | |
1046 signers_copy->obj_at_put(index, signers->obj_at(index)); | |
1047 } | |
1048 | |
1049 // return the copy | |
1050 return (jobjectArray) JNIHandles::make_local(env, signers_copy); | |
1051 JVM_END | |
1052 | |
1053 | |
1054 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) | |
1055 JVMWrapper("JVM_SetClassSigners"); | |
1056 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1057 // This call is ignored for primitive types and arrays. | |
1058 // Signers are only set once, ClassLoader.java, and thus shouldn't | |
1059 // be called with an array. Only the bootstrap loader creates arrays. | |
1060 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1061 if (Klass::cast(k)->oop_is_instance()) { | |
1062 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); | |
1063 } | |
1064 } | |
1065 JVM_END | |
1066 | |
1067 | |
1068 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) | |
1069 JVMWrapper("JVM_GetProtectionDomain"); | |
1070 if (JNIHandles::resolve(cls) == NULL) { | |
1071 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); | |
1072 } | |
1073 | |
1074 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1075 // Primitive types does not have a protection domain. | |
1076 return NULL; | |
1077 } | |
1078 | |
1079 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1080 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); | |
1081 JVM_END | |
1082 | |
1083 | |
1084 // Obsolete since 1.2 (Class.setProtectionDomain removed), although | |
1085 // still defined in core libraries as of 1.5. | |
1086 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) | |
1087 JVMWrapper("JVM_SetProtectionDomain"); | |
1088 if (JNIHandles::resolve(cls) == NULL) { | |
1089 THROW(vmSymbols::java_lang_NullPointerException()); | |
1090 } | |
1091 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1092 // Call is ignored for primitive types | |
1093 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1094 | |
1095 // cls won't be an array, as this called only from ClassLoader.defineClass | |
1096 if (Klass::cast(k)->oop_is_instance()) { | |
1097 oop pd = JNIHandles::resolve(protection_domain); | |
1098 assert(pd == NULL || pd->is_oop(), "just checking"); | |
1099 instanceKlass::cast(k)->set_protection_domain(pd); | |
1100 } | |
1101 } | |
1102 JVM_END | |
1103 | |
1104 | |
1105 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) | |
1106 JVMWrapper("JVM_DoPrivileged"); | |
1107 | |
1108 if (action == NULL) { | |
1109 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); | |
1110 } | |
1111 | |
1112 // Stack allocated list of privileged stack elements | |
1113 PrivilegedElement pi; | |
1114 | |
1115 // Check that action object understands "Object run()" | |
1116 Handle object (THREAD, JNIHandles::resolve(action)); | |
1117 | |
1118 // get run() method | |
1119 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( | |
1120 vmSymbols::run_method_name(), | |
1121 vmSymbols::void_object_signature()); | |
1122 methodHandle m (THREAD, m_oop); | |
1123 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { | |
1124 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); | |
1125 } | |
1126 | |
1127 // Compute the frame initiating the do privileged operation and setup the privileged stack | |
1128 vframeStream vfst(thread); | |
1129 vfst.security_get_caller_frame(1); | |
1130 | |
1131 if (!vfst.at_end()) { | |
1132 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); | |
1133 thread->set_privileged_stack_top(&pi); | |
1134 } | |
1135 | |
1136 | |
1137 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type | |
1138 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction | |
1139 Handle pending_exception; | |
1140 JavaValue result(T_OBJECT); | |
1141 JavaCallArguments args(object); | |
1142 JavaCalls::call(&result, m, &args, THREAD); | |
1143 | |
1144 // done with action, remove ourselves from the list | |
1145 if (!vfst.at_end()) { | |
1146 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); | |
1147 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); | |
1148 } | |
1149 | |
1150 if (HAS_PENDING_EXCEPTION) { | |
1151 pending_exception = Handle(THREAD, PENDING_EXCEPTION); | |
1152 CLEAR_PENDING_EXCEPTION; | |
1153 | |
1142 | 1154 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && |
1155 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { | |
0 | 1156 // Throw a java.security.PrivilegedActionException(Exception e) exception |
1157 JavaCallArguments args(pending_exception); | |
1158 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(), | |
1159 vmSymbolHandles::exception_void_signature(), | |
1160 &args); | |
1161 } | |
1162 } | |
1163 | |
1164 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); | |
1165 return JNIHandles::make_local(env, (oop) result.get_jobject()); | |
1166 JVM_END | |
1167 | |
1168 | |
1169 // Returns the inherited_access_control_context field of the running thread. | |
1170 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) | |
1171 JVMWrapper("JVM_GetInheritedAccessControlContext"); | |
1172 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); | |
1173 return JNIHandles::make_local(env, result); | |
1174 JVM_END | |
1175 | |
1176 class RegisterArrayForGC { | |
1177 private: | |
1178 JavaThread *_thread; | |
1179 public: | |
1180 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { | |
1181 _thread = thread; | |
1182 _thread->register_array_for_gc(array); | |
1183 } | |
1184 | |
1185 ~RegisterArrayForGC() { | |
1186 _thread->register_array_for_gc(NULL); | |
1187 } | |
1188 }; | |
1189 | |
1190 | |
1191 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) | |
1192 JVMWrapper("JVM_GetStackAccessControlContext"); | |
1193 if (!UsePrivilegedStack) return NULL; | |
1194 | |
1195 ResourceMark rm(THREAD); | |
1196 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); | |
1197 JvmtiVMObjectAllocEventCollector oam; | |
1198 | |
1199 // count the protection domains on the execution stack. We collapse | |
1200 // duplicate consecutive protection domains into a single one, as | |
1201 // well as stopping when we hit a privileged frame. | |
1202 | |
1203 // Use vframeStream to iterate through Java frames | |
1204 vframeStream vfst(thread); | |
1205 | |
1206 oop previous_protection_domain = NULL; | |
1207 Handle privileged_context(thread, NULL); | |
1208 bool is_privileged = false; | |
1209 oop protection_domain = NULL; | |
1210 | |
1211 for(; !vfst.at_end(); vfst.next()) { | |
1212 // get method of frame | |
1213 methodOop method = vfst.method(); | |
1214 intptr_t* frame_id = vfst.frame_id(); | |
1215 | |
1216 // check the privileged frames to see if we have a match | |
1217 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { | |
1218 // this frame is privileged | |
1219 is_privileged = true; | |
1220 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); | |
1221 protection_domain = thread->privileged_stack_top()->protection_domain(); | |
1222 } else { | |
1223 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); | |
1224 } | |
1225 | |
1226 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { | |
1227 local_array->push(protection_domain); | |
1228 previous_protection_domain = protection_domain; | |
1229 } | |
1230 | |
1231 if (is_privileged) break; | |
1232 } | |
1233 | |
1234 | |
1235 // either all the domains on the stack were system domains, or | |
1236 // we had a privileged system domain | |
1237 if (local_array->is_empty()) { | |
1238 if (is_privileged && privileged_context.is_null()) return NULL; | |
1239 | |
1240 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); | |
1241 return JNIHandles::make_local(env, result); | |
1242 } | |
1243 | |
1244 // the resource area must be registered in case of a gc | |
1245 RegisterArrayForGC ragc(thread, local_array); | |
1142 | 1246 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), |
0 | 1247 local_array->length(), CHECK_NULL); |
1248 objArrayHandle h_context(thread, context); | |
1249 for (int index = 0; index < local_array->length(); index++) { | |
1250 h_context->obj_at_put(index, local_array->at(index)); | |
1251 } | |
1252 | |
1253 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); | |
1254 | |
1255 return JNIHandles::make_local(env, result); | |
1256 JVM_END | |
1257 | |
1258 | |
1259 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) | |
1260 JVMWrapper("JVM_IsArrayClass"); | |
1261 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1262 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; | |
1263 JVM_END | |
1264 | |
1265 | |
1266 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) | |
1267 JVMWrapper("JVM_IsPrimitiveClass"); | |
1268 oop mirror = JNIHandles::resolve_non_null(cls); | |
1269 return (jboolean) java_lang_Class::is_primitive(mirror); | |
1270 JVM_END | |
1271 | |
1272 | |
1273 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) | |
1274 JVMWrapper("JVM_GetComponentType"); | |
1275 oop mirror = JNIHandles::resolve_non_null(cls); | |
1276 oop result = Reflection::array_component_type(mirror, CHECK_NULL); | |
1277 return (jclass) JNIHandles::make_local(env, result); | |
1278 JVM_END | |
1279 | |
1280 | |
1281 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) | |
1282 JVMWrapper("JVM_GetClassModifiers"); | |
1283 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1284 // Primitive type | |
1285 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1286 } | |
1287 | |
1288 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1289 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); | |
1290 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); | |
1291 return k->modifier_flags(); | |
1292 JVM_END | |
1293 | |
1294 | |
1295 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// | |
1296 | |
1297 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) | |
1298 const int inner_class_info_index = 0; | |
1299 const int outer_class_info_index = 1; | |
1300 | |
1301 JvmtiVMObjectAllocEventCollector oam; | |
1302 // ofClass is a reference to a java_lang_Class object. The mirror object | |
1303 // of an instanceKlass | |
1304 | |
1305 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1306 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1142 | 1307 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1308 return (jobjectArray)JNIHandles::make_local(env, result); |
1309 } | |
1310 | |
1311 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1312 | |
1313 if (k->inner_classes()->length() == 0) { | |
1314 // Neither an inner nor outer class | |
1142 | 1315 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); |
0 | 1316 return (jobjectArray)JNIHandles::make_local(env, result); |
1317 } | |
1318 | |
1319 // find inner class info | |
1320 typeArrayHandle icls(thread, k->inner_classes()); | |
1321 constantPoolHandle cp(thread, k->constants()); | |
1322 int length = icls->length(); | |
1323 | |
1324 // Allocate temp. result array | |
1142 | 1325 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); |
0 | 1326 objArrayHandle result (THREAD, r); |
1327 int members = 0; | |
1328 | |
1329 for(int i = 0; i < length; i += 4) { | |
1330 int ioff = icls->ushort_at(i + inner_class_info_index); | |
1331 int ooff = icls->ushort_at(i + outer_class_info_index); | |
1332 | |
1333 if (ioff != 0 && ooff != 0) { | |
1334 // Check to see if the name matches the class we're looking for | |
1335 // before attempting to find the class. | |
1336 if (cp->klass_name_at_matches(k, ooff)) { | |
1337 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); | |
1338 if (outer_klass == k()) { | |
1339 klassOop ik = cp->klass_at(ioff, CHECK_NULL); | |
1340 instanceKlassHandle inner_klass (THREAD, ik); | |
1341 | |
1342 // Throws an exception if outer klass has not declared k as | |
1343 // an inner klass | |
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1344 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); |
0 | 1345 |
1346 result->obj_at_put(members, inner_klass->java_mirror()); | |
1347 members++; | |
1348 } | |
1349 } | |
1350 } | |
1351 } | |
1352 | |
1353 if (members != length) { | |
1354 // Return array of right length | |
1142 | 1355 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); |
0 | 1356 for(int i = 0; i < members; i++) { |
1357 res->obj_at_put(i, result->obj_at(i)); | |
1358 } | |
1359 return (jobjectArray)JNIHandles::make_local(env, res); | |
1360 } | |
1361 | |
1362 return (jobjectArray)JNIHandles::make_local(env, result()); | |
1363 JVM_END | |
1364 | |
1365 | |
1366 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) | |
665
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1367 { |
0 | 1368 // ofClass is a reference to a java_lang_Class object. |
1369 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1370 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { | |
1371 return NULL; | |
1372 } | |
1373 | |
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1374 bool inner_is_member = false; |
665
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1375 klassOop outer_klass |
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1376 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)) |
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1377 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); |
665
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1378 if (outer_klass == NULL) return NULL; // already a top-level class |
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1379 if (!inner_is_member) return NULL; // an anonymous class (inside a method) |
665
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1380 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror()); |
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1381 } |
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1382 JVM_END |
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1383 |
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1384 // should be in instanceKlass.cpp, but is here for historical reasons |
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1385 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, |
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1386 bool* inner_is_member, |
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1387 TRAPS) { |
665
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1388 Thread* thread = THREAD; |
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1389 const int inner_class_info_index = inner_class_inner_class_info_offset; |
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1390 const int outer_class_info_index = inner_class_outer_class_info_offset; |
0 | 1391 |
1392 if (k->inner_classes()->length() == 0) { | |
1393 // No inner class info => no declaring class | |
1394 return NULL; | |
1395 } | |
1396 | |
1397 typeArrayHandle i_icls(thread, k->inner_classes()); | |
1398 constantPoolHandle i_cp(thread, k->constants()); | |
1399 int i_length = i_icls->length(); | |
1400 | |
1401 bool found = false; | |
1402 klassOop ok; | |
1403 instanceKlassHandle outer_klass; | |
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1404 *inner_is_member = false; |
0 | 1405 |
1406 // Find inner_klass attribute | |
665
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1407 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) { |
0 | 1408 int ioff = i_icls->ushort_at(i + inner_class_info_index); |
1409 int ooff = i_icls->ushort_at(i + outer_class_info_index); | |
665
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1410 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset); |
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1411 if (ioff != 0) { |
0 | 1412 // Check to see if the name matches the class we're looking for |
1413 // before attempting to find the class. | |
1414 if (i_cp->klass_name_at_matches(k, ioff)) { | |
1415 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); | |
665
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1416 found = (k() == inner_klass); |
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1417 if (found && ooff != 0) { |
0 | 1418 ok = i_cp->klass_at(ooff, CHECK_NULL); |
1419 outer_klass = instanceKlassHandle(thread, ok); | |
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1420 *inner_is_member = true; |
0 | 1421 } |
1422 } | |
1423 } | |
1424 } | |
1425 | |
665
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1426 if (found && outer_klass.is_null()) { |
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1427 // It may be anonymous; try for that. |
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1428 int encl_method_class_idx = k->enclosing_method_class_index(); |
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1429 if (encl_method_class_idx != 0) { |
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1430 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); |
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1431 outer_klass = instanceKlassHandle(thread, ok); |
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1432 *inner_is_member = false; |
665
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1433 } |
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1434 } |
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1435 |
0 | 1436 // If no inner class attribute found for this class. |
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1437 if (outer_klass.is_null()) return NULL; |
0 | 1438 |
1439 // Throws an exception if outer klass has not declared k as an inner klass | |
665
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1440 // We need evidence that each klass knows about the other, or else |
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1441 // the system could allow a spoof of an inner class to gain access rights. |
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1442 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); |
665
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1443 return outer_klass(); |
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1444 } |
0 | 1445 |
1446 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) | |
1447 assert (cls != NULL, "illegal class"); | |
1448 JVMWrapper("JVM_GetClassSignature"); | |
1449 JvmtiVMObjectAllocEventCollector oam; | |
1450 ResourceMark rm(THREAD); | |
1451 // Return null for arrays and primatives | |
1452 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1453 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1454 if (Klass::cast(k)->oop_is_instance()) { | |
1455 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature()); | |
1456 if (sym.is_null()) return NULL; | |
1457 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
1458 return (jstring) JNIHandles::make_local(env, str()); | |
1459 } | |
1460 } | |
1461 return NULL; | |
1462 JVM_END | |
1463 | |
1464 | |
1465 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) | |
1466 assert (cls != NULL, "illegal class"); | |
1467 JVMWrapper("JVM_GetClassAnnotations"); | |
1468 ResourceMark rm(THREAD); | |
1469 // Return null for arrays and primitives | |
1470 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { | |
1471 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); | |
1472 if (Klass::cast(k)->oop_is_instance()) { | |
1473 return (jbyteArray) JNIHandles::make_local(env, | |
1474 instanceKlass::cast(k)->class_annotations()); | |
1475 } | |
1476 } | |
1477 return NULL; | |
1478 JVM_END | |
1479 | |
1480 | |
1481 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) | |
1482 assert(field != NULL, "illegal field"); | |
1483 JVMWrapper("JVM_GetFieldAnnotations"); | |
1484 | |
1485 // some of this code was adapted from from jni_FromReflectedField | |
1486 | |
1487 // field is a handle to a java.lang.reflect.Field object | |
1488 oop reflected = JNIHandles::resolve_non_null(field); | |
1489 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
1490 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1491 int slot = java_lang_reflect_Field::slot(reflected); | |
1492 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
1493 | |
1494 fieldDescriptor fd; | |
1495 KlassHandle kh(THREAD, k); | |
1496 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot); | |
1497 | |
1498 if (modifiers & JVM_ACC_STATIC) { | |
1499 // for static fields we only look in the current class | |
1500 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, | |
1501 true, &fd)) { | |
1502 assert(false, "cannot find static field"); | |
1503 return NULL; // robustness | |
1504 } | |
1505 } else { | |
1506 // for instance fields we start with the current class and work | |
1507 // our way up through the superclass chain | |
1508 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, | |
1509 &fd)) { | |
1510 assert(false, "cannot find instance field"); | |
1511 return NULL; // robustness | |
1512 } | |
1513 } | |
1514 | |
1515 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); | |
1516 JVM_END | |
1517 | |
1518 | |
1519 static methodOop jvm_get_method_common(jobject method, TRAPS) { | |
1520 // some of this code was adapted from from jni_FromReflectedMethod | |
1521 | |
1522 oop reflected = JNIHandles::resolve_non_null(method); | |
1523 oop mirror = NULL; | |
1524 int slot = 0; | |
1525 | |
1142 | 1526 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { |
0 | 1527 mirror = java_lang_reflect_Constructor::clazz(reflected); |
1528 slot = java_lang_reflect_Constructor::slot(reflected); | |
1529 } else { | |
1142 | 1530 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), |
0 | 1531 "wrong type"); |
1532 mirror = java_lang_reflect_Method::clazz(reflected); | |
1533 slot = java_lang_reflect_Method::slot(reflected); | |
1534 } | |
1535 klassOop k = java_lang_Class::as_klassOop(mirror); | |
1536 | |
1537 KlassHandle kh(THREAD, k); | |
1538 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); | |
1539 if (m == NULL) { | |
1540 assert(false, "cannot find method"); | |
1541 return NULL; // robustness | |
1542 } | |
1543 | |
1544 return m; | |
1545 } | |
1546 | |
1547 | |
1548 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) | |
1549 JVMWrapper("JVM_GetMethodAnnotations"); | |
1550 | |
1551 // method is a handle to a java.lang.reflect.Method object | |
1552 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1553 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); | |
1554 JVM_END | |
1555 | |
1556 | |
1557 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) | |
1558 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); | |
1559 | |
1560 // method is a handle to a java.lang.reflect.Method object | |
1561 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1562 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); | |
1563 JVM_END | |
1564 | |
1565 | |
1566 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) | |
1567 JVMWrapper("JVM_GetMethodParameterAnnotations"); | |
1568 | |
1569 // method is a handle to a java.lang.reflect.Method object | |
1570 methodOop m = jvm_get_method_common(method, CHECK_NULL); | |
1571 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); | |
1572 JVM_END | |
1573 | |
1574 | |
1575 // New (JDK 1.4) reflection implementation ///////////////////////////////////// | |
1576 | |
1577 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1578 { | |
1579 JVMWrapper("JVM_GetClassDeclaredFields"); | |
1580 JvmtiVMObjectAllocEventCollector oam; | |
1581 | |
1582 // Exclude primitive types and array types | |
1583 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || | |
1584 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1585 // Return empty array | |
1142 | 1586 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); |
0 | 1587 return (jobjectArray) JNIHandles::make_local(env, res); |
1588 } | |
1589 | |
1590 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1591 constantPoolHandle cp(THREAD, k->constants()); | |
1592 | |
1593 // Ensure class is linked | |
1594 k->link_class(CHECK_NULL); | |
1595 | |
1596 typeArrayHandle fields(THREAD, k->fields()); | |
1597 int fields_len = fields->length(); | |
1598 | |
1599 // 4496456 We need to filter out java.lang.Throwable.backtrace | |
1600 bool skip_backtrace = false; | |
1601 | |
1602 // Allocate result | |
1603 int num_fields; | |
1604 | |
1605 if (publicOnly) { | |
1606 num_fields = 0; | |
1607 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) { | |
1608 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
1609 if (mods & JVM_ACC_PUBLIC) ++num_fields; | |
1610 } | |
1611 } else { | |
1612 num_fields = fields_len / instanceKlass::next_offset; | |
1613 | |
1142 | 1614 if (k() == SystemDictionary::Throwable_klass()) { |
0 | 1615 num_fields--; |
1616 skip_backtrace = true; | |
1617 } | |
1618 } | |
1619 | |
1142 | 1620 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); |
0 | 1621 objArrayHandle result (THREAD, r); |
1622 | |
1623 int out_idx = 0; | |
1624 fieldDescriptor fd; | |
1625 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) { | |
1626 if (skip_backtrace) { | |
1627 // 4496456 skip java.lang.Throwable.backtrace | |
1628 int offset = k->offset_from_fields(i); | |
1629 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; | |
1630 } | |
1631 | |
1632 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
1633 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) { | |
1634 fd.initialize(k(), i); | |
1635 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); | |
1636 result->obj_at_put(out_idx, field); | |
1637 ++out_idx; | |
1638 } | |
1639 } | |
1640 assert(out_idx == num_fields, "just checking"); | |
1641 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1642 } | |
1643 JVM_END | |
1644 | |
1645 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1646 { | |
1647 JVMWrapper("JVM_GetClassDeclaredMethods"); | |
1648 JvmtiVMObjectAllocEventCollector oam; | |
1649 | |
1650 // Exclude primitive types and array types | |
1651 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1652 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1653 // Return empty array | |
1142 | 1654 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); |
0 | 1655 return (jobjectArray) JNIHandles::make_local(env, res); |
1656 } | |
1657 | |
1658 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1659 | |
1660 // Ensure class is linked | |
1661 k->link_class(CHECK_NULL); | |
1662 | |
1663 objArrayHandle methods (THREAD, k->methods()); | |
1664 int methods_length = methods->length(); | |
1665 int num_methods = 0; | |
1666 | |
1667 int i; | |
1668 for (i = 0; i < methods_length; i++) { | |
1669 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1670 if (!method->is_initializer()) { | |
1671 if (!publicOnly || method->is_public()) { | |
1672 ++num_methods; | |
1673 } | |
1674 } | |
1675 } | |
1676 | |
1677 // Allocate result | |
1142 | 1678 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); |
0 | 1679 objArrayHandle result (THREAD, r); |
1680 | |
1681 int out_idx = 0; | |
1682 for (i = 0; i < methods_length; i++) { | |
1683 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1684 if (!method->is_initializer()) { | |
1685 if (!publicOnly || method->is_public()) { | |
1686 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); | |
1687 result->obj_at_put(out_idx, m); | |
1688 ++out_idx; | |
1689 } | |
1690 } | |
1691 } | |
1692 assert(out_idx == num_methods, "just checking"); | |
1693 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1694 } | |
1695 JVM_END | |
1696 | |
1697 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) | |
1698 { | |
1699 JVMWrapper("JVM_GetClassDeclaredConstructors"); | |
1700 JvmtiVMObjectAllocEventCollector oam; | |
1701 | |
1702 // Exclude primitive types and array types | |
1703 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) | |
1704 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { | |
1705 // Return empty array | |
1142 | 1706 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); |
0 | 1707 return (jobjectArray) JNIHandles::make_local(env, res); |
1708 } | |
1709 | |
1710 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); | |
1711 | |
1712 // Ensure class is linked | |
1713 k->link_class(CHECK_NULL); | |
1714 | |
1715 objArrayHandle methods (THREAD, k->methods()); | |
1716 int methods_length = methods->length(); | |
1717 int num_constructors = 0; | |
1718 | |
1719 int i; | |
1720 for (i = 0; i < methods_length; i++) { | |
1721 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1722 if (method->is_initializer() && !method->is_static()) { | |
1723 if (!publicOnly || method->is_public()) { | |
1724 ++num_constructors; | |
1725 } | |
1726 } | |
1727 } | |
1728 | |
1729 // Allocate result | |
1142 | 1730 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); |
0 | 1731 objArrayHandle result(THREAD, r); |
1732 | |
1733 int out_idx = 0; | |
1734 for (i = 0; i < methods_length; i++) { | |
1735 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); | |
1736 if (method->is_initializer() && !method->is_static()) { | |
1737 if (!publicOnly || method->is_public()) { | |
1738 oop m = Reflection::new_constructor(method, CHECK_NULL); | |
1739 result->obj_at_put(out_idx, m); | |
1740 ++out_idx; | |
1741 } | |
1742 } | |
1743 } | |
1744 assert(out_idx == num_constructors, "just checking"); | |
1745 return (jobjectArray) JNIHandles::make_local(env, result()); | |
1746 } | |
1747 JVM_END | |
1748 | |
1749 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) | |
1750 { | |
1751 JVMWrapper("JVM_GetClassAccessFlags"); | |
1752 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1753 // Primitive type | |
1754 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
1755 } | |
1756 | |
1757 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
1758 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; | |
1759 } | |
1760 JVM_END | |
1761 | |
1762 | |
1763 // Constant pool access ////////////////////////////////////////////////////////// | |
1764 | |
1765 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) | |
1766 { | |
1767 JVMWrapper("JVM_GetClassConstantPool"); | |
1768 JvmtiVMObjectAllocEventCollector oam; | |
1769 | |
1770 // Return null for primitives and arrays | |
1771 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { | |
1772 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
1773 if (Klass::cast(k)->oop_is_instance()) { | |
1774 instanceKlassHandle k_h(THREAD, k); | |
1775 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); | |
1776 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); | |
1777 return JNIHandles::make_local(jcp()); | |
1778 } | |
1779 } | |
1780 return NULL; | |
1781 } | |
1782 JVM_END | |
1783 | |
1784 | |
1785 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) | |
1786 { | |
1787 JVMWrapper("JVM_ConstantPoolGetSize"); | |
1788 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1789 return cp->length(); | |
1790 } | |
1791 JVM_END | |
1792 | |
1793 | |
1794 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { | |
1795 if (!cp->is_within_bounds(index)) { | |
1796 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); | |
1797 } | |
1798 } | |
1799 | |
1800 | |
1801 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1802 { | |
1803 JVMWrapper("JVM_ConstantPoolGetClassAt"); | |
1804 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1805 bounds_check(cp, index, CHECK_NULL); | |
1806 constantTag tag = cp->tag_at(index); | |
1807 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1808 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1809 } | |
1810 klassOop k = cp->klass_at(index, CHECK_NULL); | |
1811 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); | |
1812 } | |
1813 JVM_END | |
1814 | |
1815 | |
1816 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1817 { | |
1818 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); | |
1819 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1820 bounds_check(cp, index, CHECK_NULL); | |
1821 constantTag tag = cp->tag_at(index); | |
1822 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1823 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1824 } | |
1825 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); | |
1826 if (k == NULL) return NULL; | |
1827 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); | |
1828 } | |
1829 JVM_END | |
1830 | |
1831 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1832 constantTag tag = cp->tag_at(index); | |
1833 if (!tag.is_method() && !tag.is_interface_method()) { | |
1834 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1835 } | |
1836 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1837 klassOop k_o; | |
1838 if (force_resolution) { | |
1839 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1840 } else { | |
1841 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1842 if (k_o == NULL) return NULL; | |
1843 } | |
1844 instanceKlassHandle k(THREAD, k_o); | |
1845 symbolOop name = cp->uncached_name_ref_at(index); | |
1846 symbolOop sig = cp->uncached_signature_ref_at(index); | |
1847 methodHandle m (THREAD, k->find_method(name, sig)); | |
1848 if (m.is_null()) { | |
1849 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); | |
1850 } | |
1851 oop method; | |
1852 if (!m->is_initializer() || m->is_static()) { | |
1853 method = Reflection::new_method(m, true, true, CHECK_NULL); | |
1854 } else { | |
1855 method = Reflection::new_constructor(m, CHECK_NULL); | |
1856 } | |
1857 return JNIHandles::make_local(method); | |
1858 } | |
1859 | |
1860 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1861 { | |
1862 JVMWrapper("JVM_ConstantPoolGetMethodAt"); | |
1863 JvmtiVMObjectAllocEventCollector oam; | |
1864 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1865 bounds_check(cp, index, CHECK_NULL); | |
1866 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); | |
1867 return res; | |
1868 } | |
1869 JVM_END | |
1870 | |
1871 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1872 { | |
1873 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); | |
1874 JvmtiVMObjectAllocEventCollector oam; | |
1875 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1876 bounds_check(cp, index, CHECK_NULL); | |
1877 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); | |
1878 return res; | |
1879 } | |
1880 JVM_END | |
1881 | |
1882 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { | |
1883 constantTag tag = cp->tag_at(index); | |
1884 if (!tag.is_field()) { | |
1885 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1886 } | |
1887 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1888 klassOop k_o; | |
1889 if (force_resolution) { | |
1890 k_o = cp->klass_at(klass_ref, CHECK_NULL); | |
1891 } else { | |
1892 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); | |
1893 if (k_o == NULL) return NULL; | |
1894 } | |
1895 instanceKlassHandle k(THREAD, k_o); | |
1896 symbolOop name = cp->uncached_name_ref_at(index); | |
1897 symbolOop sig = cp->uncached_signature_ref_at(index); | |
1898 fieldDescriptor fd; | |
1899 klassOop target_klass = k->find_field(name, sig, &fd); | |
1900 if (target_klass == NULL) { | |
1901 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); | |
1902 } | |
1903 oop field = Reflection::new_field(&fd, true, CHECK_NULL); | |
1904 return JNIHandles::make_local(field); | |
1905 } | |
1906 | |
1907 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1908 { | |
1909 JVMWrapper("JVM_ConstantPoolGetFieldAt"); | |
1910 JvmtiVMObjectAllocEventCollector oam; | |
1911 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1912 bounds_check(cp, index, CHECK_NULL); | |
1913 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); | |
1914 return res; | |
1915 } | |
1916 JVM_END | |
1917 | |
1918 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1919 { | |
1920 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); | |
1921 JvmtiVMObjectAllocEventCollector oam; | |
1922 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1923 bounds_check(cp, index, CHECK_NULL); | |
1924 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); | |
1925 return res; | |
1926 } | |
1927 JVM_END | |
1928 | |
1929 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1930 { | |
1931 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); | |
1932 JvmtiVMObjectAllocEventCollector oam; | |
1933 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1934 bounds_check(cp, index, CHECK_NULL); | |
1935 constantTag tag = cp->tag_at(index); | |
1936 if (!tag.is_field_or_method()) { | |
1937 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1938 } | |
1939 int klass_ref = cp->uncached_klass_ref_index_at(index); | |
1940 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref)); | |
1941 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index)); | |
1942 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index)); | |
1142 | 1943 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); |
0 | 1944 objArrayHandle dest(THREAD, dest_o); |
1945 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); | |
1946 dest->obj_at_put(0, str()); | |
1947 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); | |
1948 dest->obj_at_put(1, str()); | |
1949 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); | |
1950 dest->obj_at_put(2, str()); | |
1951 return (jobjectArray) JNIHandles::make_local(dest()); | |
1952 } | |
1953 JVM_END | |
1954 | |
1955 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1956 { | |
1957 JVMWrapper("JVM_ConstantPoolGetIntAt"); | |
1958 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1959 bounds_check(cp, index, CHECK_0); | |
1960 constantTag tag = cp->tag_at(index); | |
1961 if (!tag.is_int()) { | |
1962 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1963 } | |
1964 return cp->int_at(index); | |
1965 } | |
1966 JVM_END | |
1967 | |
1968 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1969 { | |
1970 JVMWrapper("JVM_ConstantPoolGetLongAt"); | |
1971 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1972 bounds_check(cp, index, CHECK_(0L)); | |
1973 constantTag tag = cp->tag_at(index); | |
1974 if (!tag.is_long()) { | |
1975 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1976 } | |
1977 return cp->long_at(index); | |
1978 } | |
1979 JVM_END | |
1980 | |
1981 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1982 { | |
1983 JVMWrapper("JVM_ConstantPoolGetFloatAt"); | |
1984 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1985 bounds_check(cp, index, CHECK_(0.0f)); | |
1986 constantTag tag = cp->tag_at(index); | |
1987 if (!tag.is_float()) { | |
1988 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
1989 } | |
1990 return cp->float_at(index); | |
1991 } | |
1992 JVM_END | |
1993 | |
1994 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
1995 { | |
1996 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); | |
1997 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
1998 bounds_check(cp, index, CHECK_(0.0)); | |
1999 constantTag tag = cp->tag_at(index); | |
2000 if (!tag.is_double()) { | |
2001 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2002 } | |
2003 return cp->double_at(index); | |
2004 } | |
2005 JVM_END | |
2006 | |
2007 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
2008 { | |
2009 JVMWrapper("JVM_ConstantPoolGetStringAt"); | |
2010 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
2011 bounds_check(cp, index, CHECK_NULL); | |
2012 constantTag tag = cp->tag_at(index); | |
2013 if (!tag.is_string() && !tag.is_unresolved_string()) { | |
2014 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2015 } | |
2016 oop str = cp->string_at(index, CHECK_NULL); | |
2017 return (jstring) JNIHandles::make_local(str); | |
2018 } | |
2019 JVM_END | |
2020 | |
2021 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) | |
2022 { | |
2023 JVMWrapper("JVM_ConstantPoolGetUTF8At"); | |
2024 JvmtiVMObjectAllocEventCollector oam; | |
2025 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); | |
2026 bounds_check(cp, index, CHECK_NULL); | |
2027 constantTag tag = cp->tag_at(index); | |
2028 if (!tag.is_symbol()) { | |
2029 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); | |
2030 } | |
2031 symbolOop sym_o = cp->symbol_at(index); | |
2032 symbolHandle sym(THREAD, sym_o); | |
2033 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
2034 return (jstring) JNIHandles::make_local(str()); | |
2035 } | |
2036 JVM_END | |
2037 | |
2038 | |
2039 // Assertion support. ////////////////////////////////////////////////////////// | |
2040 | |
2041 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) | |
2042 JVMWrapper("JVM_DesiredAssertionStatus"); | |
2043 assert(cls != NULL, "bad class"); | |
2044 | |
2045 oop r = JNIHandles::resolve(cls); | |
2046 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); | |
2047 if (java_lang_Class::is_primitive(r)) return false; | |
2048 | |
2049 klassOop k = java_lang_Class::as_klassOop(r); | |
2050 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); | |
2051 if (! Klass::cast(k)->oop_is_instance()) return false; | |
2052 | |
2053 ResourceMark rm(THREAD); | |
2054 const char* name = Klass::cast(k)->name()->as_C_string(); | |
2055 bool system_class = Klass::cast(k)->class_loader() == NULL; | |
2056 return JavaAssertions::enabled(name, system_class); | |
2057 | |
2058 JVM_END | |
2059 | |
2060 | |
2061 // Return a new AssertionStatusDirectives object with the fields filled in with | |
2062 // command-line assertion arguments (i.e., -ea, -da). | |
2063 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) | |
2064 JVMWrapper("JVM_AssertionStatusDirectives"); | |
2065 JvmtiVMObjectAllocEventCollector oam; | |
2066 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); | |
2067 return JNIHandles::make_local(env, asd); | |
2068 JVM_END | |
2069 | |
2070 // Verification //////////////////////////////////////////////////////////////////////////////// | |
2071 | |
2072 // Reflection for the verifier ///////////////////////////////////////////////////////////////// | |
2073 | |
2074 // RedefineClasses support: bug 6214132 caused verification to fail. | |
2075 // All functions from this section should call the jvmtiThreadSate function: | |
2076 // klassOop class_to_verify_considering_redefinition(klassOop klass). | |
2077 // The function returns a klassOop of the _scratch_class if the verifier | |
2078 // was invoked in the middle of the class redefinition. | |
2079 // Otherwise it returns its argument value which is the _the_class klassOop. | |
2080 // Please, refer to the description in the jvmtiThreadSate.hpp. | |
2081 | |
2082 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) | |
2083 JVMWrapper("JVM_GetClassNameUTF"); | |
2084 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2085 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2086 return Klass::cast(k)->name()->as_utf8(); | |
2087 JVM_END | |
2088 | |
2089 | |
2090 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) | |
2091 JVMWrapper("JVM_GetClassCPTypes"); | |
2092 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2093 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2094 // types will have length zero if this is not an instanceKlass | |
2095 // (length is determined by call to JVM_GetClassCPEntriesCount) | |
2096 if (Klass::cast(k)->oop_is_instance()) { | |
2097 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2098 for (int index = cp->length() - 1; index >= 0; index--) { | |
2099 constantTag tag = cp->tag_at(index); | |
2100 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : | |
2101 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); | |
2102 } | |
2103 } | |
2104 JVM_END | |
2105 | |
2106 | |
2107 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) | |
2108 JVMWrapper("JVM_GetClassCPEntriesCount"); | |
2109 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2110 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2111 if (!Klass::cast(k)->oop_is_instance()) | |
2112 return 0; | |
2113 return instanceKlass::cast(k)->constants()->length(); | |
2114 JVM_END | |
2115 | |
2116 | |
2117 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) | |
2118 JVMWrapper("JVM_GetClassFieldsCount"); | |
2119 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2120 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2121 if (!Klass::cast(k)->oop_is_instance()) | |
2122 return 0; | |
2123 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset; | |
2124 JVM_END | |
2125 | |
2126 | |
2127 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) | |
2128 JVMWrapper("JVM_GetClassMethodsCount"); | |
2129 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2130 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2131 if (!Klass::cast(k)->oop_is_instance()) | |
2132 return 0; | |
2133 return instanceKlass::cast(k)->methods()->length(); | |
2134 JVM_END | |
2135 | |
2136 | |
2137 // The following methods, used for the verifier, are never called with | |
2138 // array klasses, so a direct cast to instanceKlass is safe. | |
2139 // Typically, these methods are called in a loop with bounds determined | |
2140 // by the results of JVM_GetClass{Fields,Methods}Count, which return | |
2141 // zero for arrays. | |
2142 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) | |
2143 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); | |
2144 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2145 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2146 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2147 int length = methodOop(method)->checked_exceptions_length(); | |
2148 if (length > 0) { | |
2149 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); | |
2150 for (int i = 0; i < length; i++) { | |
2151 exceptions[i] = table[i].class_cp_index; | |
2152 } | |
2153 } | |
2154 JVM_END | |
2155 | |
2156 | |
2157 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) | |
2158 JVMWrapper("JVM_GetMethodIxExceptionsCount"); | |
2159 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2160 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2161 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2162 return methodOop(method)->checked_exceptions_length(); | |
2163 JVM_END | |
2164 | |
2165 | |
2166 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) | |
2167 JVMWrapper("JVM_GetMethodIxByteCode"); | |
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 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); | |
2172 JVM_END | |
2173 | |
2174 | |
2175 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) | |
2176 JVMWrapper("JVM_GetMethodIxByteCodeLength"); | |
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)->code_size(); | |
2181 JVM_END | |
2182 | |
2183 | |
2184 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) | |
2185 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); | |
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 typeArrayOop extable = methodOop(method)->exception_table(); | |
2190 entry->start_pc = extable->int_at(entry_index * 4); | |
2191 entry->end_pc = extable->int_at(entry_index * 4 + 1); | |
2192 entry->handler_pc = extable->int_at(entry_index * 4 + 2); | |
2193 entry->catchType = extable->int_at(entry_index * 4 + 3); | |
2194 JVM_END | |
2195 | |
2196 | |
2197 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) | |
2198 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); | |
2199 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2200 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2201 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2202 return methodOop(method)->exception_table()->length() / 4; | |
2203 JVM_END | |
2204 | |
2205 | |
2206 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) | |
2207 JVMWrapper("JVM_GetMethodIxModifiers"); | |
2208 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2209 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2210 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2211 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2212 JVM_END | |
2213 | |
2214 | |
2215 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) | |
2216 JVMWrapper("JVM_GetFieldIxModifiers"); | |
2217 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2218 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2219 typeArrayOop fields = instanceKlass::cast(k)->fields(); | |
2220 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
2221 JVM_END | |
2222 | |
2223 | |
2224 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) | |
2225 JVMWrapper("JVM_GetMethodIxLocalsCount"); | |
2226 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2227 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2228 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2229 return methodOop(method)->max_locals(); | |
2230 JVM_END | |
2231 | |
2232 | |
2233 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) | |
2234 JVMWrapper("JVM_GetMethodIxArgsSize"); | |
2235 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2236 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2237 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2238 return methodOop(method)->size_of_parameters(); | |
2239 JVM_END | |
2240 | |
2241 | |
2242 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) | |
2243 JVMWrapper("JVM_GetMethodIxMaxStack"); | |
2244 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2245 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2246 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2247 return methodOop(method)->max_stack(); | |
2248 JVM_END | |
2249 | |
2250 | |
2251 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) | |
2252 JVMWrapper("JVM_IsConstructorIx"); | |
2253 ResourceMark rm(THREAD); | |
2254 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2255 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2256 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2257 return methodOop(method)->name() == vmSymbols::object_initializer_name(); | |
2258 JVM_END | |
2259 | |
2260 | |
2261 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2262 JVMWrapper("JVM_GetMethodIxIxUTF"); | |
2263 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2264 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2265 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2266 return methodOop(method)->name()->as_utf8(); | |
2267 JVM_END | |
2268 | |
2269 | |
2270 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) | |
2271 JVMWrapper("JVM_GetMethodIxSignatureUTF"); | |
2272 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2273 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2274 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); | |
2275 return methodOop(method)->signature()->as_utf8(); | |
2276 JVM_END | |
2277 | |
2278 /** | |
2279 * All of these JVM_GetCP-xxx methods are used by the old verifier to | |
2280 * read entries in the constant pool. Since the old verifier always | |
2281 * works on a copy of the code, it will not see any rewriting that | |
2282 * may possibly occur in the middle of verification. So it is important | |
2283 * that nothing it calls tries to use the cpCache instead of the raw | |
2284 * constant pool, so we must use cp->uncached_x methods when appropriate. | |
2285 */ | |
2286 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2287 JVMWrapper("JVM_GetCPFieldNameUTF"); | |
2288 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2289 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2290 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2291 switch (cp->tag_at(cp_index).value()) { | |
2292 case JVM_CONSTANT_Fieldref: | |
2293 return cp->uncached_name_ref_at(cp_index)->as_utf8(); | |
2294 default: | |
2295 fatal("JVM_GetCPFieldNameUTF: illegal constant"); | |
2296 } | |
2297 ShouldNotReachHere(); | |
2298 return NULL; | |
2299 JVM_END | |
2300 | |
2301 | |
2302 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2303 JVMWrapper("JVM_GetCPMethodNameUTF"); | |
2304 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2305 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2306 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2307 switch (cp->tag_at(cp_index).value()) { | |
2308 case JVM_CONSTANT_InterfaceMethodref: | |
2309 case JVM_CONSTANT_Methodref: | |
1059
389049f3f393
6858164: invokedynamic code needs some cleanup (post-6655638)
jrose
parents:
973
diff
changeset
|
2310 case JVM_CONSTANT_NameAndType: // for invokedynamic |
0 | 2311 return cp->uncached_name_ref_at(cp_index)->as_utf8(); |
2312 default: | |
2313 fatal("JVM_GetCPMethodNameUTF: illegal constant"); | |
2314 } | |
2315 ShouldNotReachHere(); | |
2316 return NULL; | |
2317 JVM_END | |
2318 | |
2319 | |
2320 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2321 JVMWrapper("JVM_GetCPMethodSignatureUTF"); | |
2322 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2323 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2324 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2325 switch (cp->tag_at(cp_index).value()) { | |
2326 case JVM_CONSTANT_InterfaceMethodref: | |
2327 case JVM_CONSTANT_Methodref: | |
1059
389049f3f393
6858164: invokedynamic code needs some cleanup (post-6655638)
jrose
parents:
973
diff
changeset
|
2328 case JVM_CONSTANT_NameAndType: // for invokedynamic |
0 | 2329 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); |
2330 default: | |
2331 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); | |
2332 } | |
2333 ShouldNotReachHere(); | |
2334 return NULL; | |
2335 JVM_END | |
2336 | |
2337 | |
2338 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2339 JVMWrapper("JVM_GetCPFieldSignatureUTF"); | |
2340 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2341 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2342 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2343 switch (cp->tag_at(cp_index).value()) { | |
2344 case JVM_CONSTANT_Fieldref: | |
2345 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); | |
2346 default: | |
2347 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); | |
2348 } | |
2349 ShouldNotReachHere(); | |
2350 return NULL; | |
2351 JVM_END | |
2352 | |
2353 | |
2354 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2355 JVMWrapper("JVM_GetCPClassNameUTF"); | |
2356 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2357 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2358 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2359 symbolOop classname = cp->klass_name_at(cp_index); | |
2360 return classname->as_utf8(); | |
2361 JVM_END | |
2362 | |
2363 | |
2364 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2365 JVMWrapper("JVM_GetCPFieldClassNameUTF"); | |
2366 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2367 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2368 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2369 switch (cp->tag_at(cp_index).value()) { | |
2370 case JVM_CONSTANT_Fieldref: { | |
2371 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
2372 symbolOop classname = cp->klass_name_at(class_index); | |
2373 return classname->as_utf8(); | |
2374 } | |
2375 default: | |
2376 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); | |
2377 } | |
2378 ShouldNotReachHere(); | |
2379 return NULL; | |
2380 JVM_END | |
2381 | |
2382 | |
2383 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) | |
2384 JVMWrapper("JVM_GetCPMethodClassNameUTF"); | |
2385 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2386 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2387 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2388 switch (cp->tag_at(cp_index).value()) { | |
2389 case JVM_CONSTANT_Methodref: | |
2390 case JVM_CONSTANT_InterfaceMethodref: { | |
2391 int class_index = cp->uncached_klass_ref_index_at(cp_index); | |
2392 symbolOop classname = cp->klass_name_at(class_index); | |
2393 return classname->as_utf8(); | |
2394 } | |
2395 default: | |
2396 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); | |
2397 } | |
2398 ShouldNotReachHere(); | |
2399 return NULL; | |
2400 JVM_END | |
2401 | |
2402 | |
2403 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2404 JVMWrapper("JVM_GetCPFieldModifiers"); | |
2405 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2406 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2407 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2408 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2409 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2410 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); | |
2411 switch (cp->tag_at(cp_index).value()) { | |
2412 case JVM_CONSTANT_Fieldref: { | |
2413 symbolOop name = cp->uncached_name_ref_at(cp_index); | |
2414 symbolOop signature = cp->uncached_signature_ref_at(cp_index); | |
2415 typeArrayOop fields = instanceKlass::cast(k_called)->fields(); | |
2416 int fields_count = fields->length(); | |
2417 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) { | |
2418 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name && | |
2419 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) { | |
2420 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
2421 } | |
2422 } | |
2423 return -1; | |
2424 } | |
2425 default: | |
2426 fatal("JVM_GetCPFieldModifiers: illegal constant"); | |
2427 } | |
2428 ShouldNotReachHere(); | |
2429 return 0; | |
2430 JVM_END | |
2431 | |
2432 | |
2433 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) | |
2434 JVMWrapper("JVM_GetCPMethodModifiers"); | |
2435 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); | |
2436 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); | |
2437 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); | |
2438 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); | |
2439 constantPoolOop cp = instanceKlass::cast(k)->constants(); | |
2440 switch (cp->tag_at(cp_index).value()) { | |
2441 case JVM_CONSTANT_Methodref: | |
2442 case JVM_CONSTANT_InterfaceMethodref: { | |
2443 symbolOop name = cp->uncached_name_ref_at(cp_index); | |
2444 symbolOop signature = cp->uncached_signature_ref_at(cp_index); | |
2445 objArrayOop methods = instanceKlass::cast(k_called)->methods(); | |
2446 int methods_count = methods->length(); | |
2447 for (int i = 0; i < methods_count; i++) { | |
2448 methodOop method = methodOop(methods->obj_at(i)); | |
2449 if (method->name() == name && method->signature() == signature) { | |
2450 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2451 } | |
2452 } | |
2453 return -1; | |
2454 } | |
2455 default: | |
2456 fatal("JVM_GetCPMethodModifiers: illegal constant"); | |
2457 } | |
2458 ShouldNotReachHere(); | |
2459 return 0; | |
2460 JVM_END | |
2461 | |
2462 | |
2463 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// | |
2464 | |
2465 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) | |
2466 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything | |
2467 JVM_END | |
2468 | |
2469 | |
2470 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) | |
2471 JVMWrapper("JVM_IsSameClassPackage"); | |
2472 oop class1_mirror = JNIHandles::resolve_non_null(class1); | |
2473 oop class2_mirror = JNIHandles::resolve_non_null(class2); | |
2474 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); | |
2475 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); | |
2476 return (jboolean) Reflection::is_same_class_package(klass1, klass2); | |
2477 JVM_END | |
2478 | |
2479 | |
2480 // IO functions //////////////////////////////////////////////////////////////////////////////////////// | |
2481 | |
2482 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) | |
2483 JVMWrapper2("JVM_Open (%s)", fname); | |
2484 | |
2485 //%note jvm_r6 | |
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|
2486 int result = os::open(fname, flags, mode); |
0 | 2487 if (result >= 0) { |
2488 return result; | |
2489 } else { | |
2490 switch(errno) { | |
2491 case EEXIST: | |
2492 return JVM_EEXIST; | |
2493 default: | |
2494 return -1; | |
2495 } | |
2496 } | |
2497 JVM_END | |
2498 | |
2499 | |
2500 JVM_LEAF(jint, JVM_Close(jint fd)) | |
2501 JVMWrapper2("JVM_Close (0x%x)", fd); | |
2502 //%note jvm_r6 | |
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|
2503 return os::close(fd); |
0 | 2504 JVM_END |
2505 | |
2506 | |
2507 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) | |
2508 JVMWrapper2("JVM_Read (0x%x)", fd); | |
2509 | |
2510 //%note jvm_r6 | |
1980
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|
2511 return (jint)os::restartable_read(fd, buf, nbytes); |
0 | 2512 JVM_END |
2513 | |
2514 | |
2515 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) | |
2516 JVMWrapper2("JVM_Write (0x%x)", fd); | |
2517 | |
2518 //%note jvm_r6 | |
1980
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2519 return (jint)os::write(fd, buf, nbytes); |
0 | 2520 JVM_END |
2521 | |
2522 | |
2523 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) | |
2524 JVMWrapper2("JVM_Available (0x%x)", fd); | |
2525 //%note jvm_r6 | |
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|
2526 return os::available(fd, pbytes); |
0 | 2527 JVM_END |
2528 | |
2529 | |
2530 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) | |
2531 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); | |
2532 //%note jvm_r6 | |
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|
2533 return os::lseek(fd, offset, whence); |
0 | 2534 JVM_END |
2535 | |
2536 | |
2537 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) | |
2538 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); | |
1980
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diff
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|
2539 return os::ftruncate(fd, length); |
0 | 2540 JVM_END |
2541 | |
2542 | |
2543 JVM_LEAF(jint, JVM_Sync(jint fd)) | |
2544 JVMWrapper2("JVM_Sync (0x%x)", fd); | |
2545 //%note jvm_r6 | |
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|
2546 return os::fsync(fd); |
0 | 2547 JVM_END |
2548 | |
2549 | |
2550 // Printing support ////////////////////////////////////////////////// | |
2551 extern "C" { | |
2552 | |
2553 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { | |
2554 // see bug 4399518, 4417214 | |
2555 if ((intptr_t)count <= 0) return -1; | |
2556 return vsnprintf(str, count, fmt, args); | |
2557 } | |
2558 | |
2559 | |
2560 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { | |
2561 va_list args; | |
2562 int len; | |
2563 va_start(args, fmt); | |
2564 len = jio_vsnprintf(str, count, fmt, args); | |
2565 va_end(args); | |
2566 return len; | |
2567 } | |
2568 | |
2569 | |
2570 int jio_fprintf(FILE* f, const char *fmt, ...) { | |
2571 int len; | |
2572 va_list args; | |
2573 va_start(args, fmt); | |
2574 len = jio_vfprintf(f, fmt, args); | |
2575 va_end(args); | |
2576 return len; | |
2577 } | |
2578 | |
2579 | |
2580 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { | |
2581 if (Arguments::vfprintf_hook() != NULL) { | |
2582 return Arguments::vfprintf_hook()(f, fmt, args); | |
2583 } else { | |
2584 return vfprintf(f, fmt, args); | |
2585 } | |
2586 } | |
2587 | |
2588 | |
2589 int jio_printf(const char *fmt, ...) { | |
2590 int len; | |
2591 va_list args; | |
2592 va_start(args, fmt); | |
2593 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); | |
2594 va_end(args); | |
2595 return len; | |
2596 } | |
2597 | |
2598 | |
2599 // HotSpot specific jio method | |
2600 void jio_print(const char* s) { | |
2601 // Try to make this function as atomic as possible. | |
2602 if (Arguments::vfprintf_hook() != NULL) { | |
2603 jio_fprintf(defaultStream::output_stream(), "%s", s); | |
2604 } else { | |
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2605 // Make an unused local variable to avoid warning from gcc 4.x compiler. |
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2606 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); |
0 | 2607 } |
2608 } | |
2609 | |
2610 } // Extern C | |
2611 | |
2612 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// | |
2613 | |
2614 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock | |
2615 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or | |
2616 // OSThread objects. The exception to this rule is when the target object is the thread | |
2617 // doing the operation, in which case we know that the thread won't exit until the | |
2618 // operation is done (all exits being voluntary). There are a few cases where it is | |
2619 // rather silly to do operations on yourself, like resuming yourself or asking whether | |
2620 // you are alive. While these can still happen, they are not subject to deadlocks if | |
2621 // the lock is held while the operation occurs (this is not the case for suspend, for | |
2622 // instance), and are very unlikely. Because IsAlive needs to be fast and its | |
2623 // implementation is local to this file, we always lock Threads_lock for that one. | |
2624 | |
2625 static void thread_entry(JavaThread* thread, TRAPS) { | |
2626 HandleMark hm(THREAD); | |
2627 Handle obj(THREAD, thread->threadObj()); | |
2628 JavaValue result(T_VOID); | |
2629 JavaCalls::call_virtual(&result, | |
2630 obj, | |
1142 | 2631 KlassHandle(THREAD, SystemDictionary::Thread_klass()), |
0 | 2632 vmSymbolHandles::run_method_name(), |
2633 vmSymbolHandles::void_method_signature(), | |
2634 THREAD); | |
2635 } | |
2636 | |
2637 | |
2638 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) | |
2639 JVMWrapper("JVM_StartThread"); | |
2640 JavaThread *native_thread = NULL; | |
2641 | |
2642 // We cannot hold the Threads_lock when we throw an exception, | |
2643 // due to rank ordering issues. Example: we might need to grab the | |
2644 // Heap_lock while we construct the exception. | |
2645 bool throw_illegal_thread_state = false; | |
2646 | |
2647 // We must release the Threads_lock before we can post a jvmti event | |
2648 // in Thread::start. | |
2649 { | |
2650 // Ensure that the C++ Thread and OSThread structures aren't freed before | |
2651 // we operate. | |
2652 MutexLocker mu(Threads_lock); | |
2653 | |
2654 // Check to see if we're running a thread that's already exited or was | |
2655 // stopped (is_stillborn) or is still active (thread is not NULL). | |
2656 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) || | |
2657 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { | |
2658 throw_illegal_thread_state = true; | |
2659 } else { | |
2660 jlong size = | |
2661 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); | |
2662 // Allocate the C++ Thread structure and create the native thread. The | |
2663 // stack size retrieved from java is signed, but the constructor takes | |
2664 // size_t (an unsigned type), so avoid passing negative values which would | |
2665 // result in really large stacks. | |
2666 size_t sz = size > 0 ? (size_t) size : 0; | |
2667 native_thread = new JavaThread(&thread_entry, sz); | |
2668 | |
2669 // At this point it may be possible that no osthread was created for the | |
2670 // JavaThread due to lack of memory. Check for this situation and throw | |
2671 // an exception if necessary. Eventually we may want to change this so | |
2672 // that we only grab the lock if the thread was created successfully - | |
2673 // then we can also do this check and throw the exception in the | |
2674 // JavaThread constructor. | |
2675 if (native_thread->osthread() != NULL) { | |
2676 // Note: the current thread is not being used within "prepare". | |
2677 native_thread->prepare(jthread); | |
2678 } | |
2679 } | |
2680 } | |
2681 | |
2682 if (throw_illegal_thread_state) { | |
2683 THROW(vmSymbols::java_lang_IllegalThreadStateException()); | |
2684 } | |
2685 | |
2686 assert(native_thread != NULL, "Starting null thread?"); | |
2687 | |
2688 if (native_thread->osthread() == NULL) { | |
2689 // No one should hold a reference to the 'native_thread'. | |
2690 delete native_thread; | |
2691 if (JvmtiExport::should_post_resource_exhausted()) { | |
2692 JvmtiExport::post_resource_exhausted( | |
2693 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, | |
2694 "unable to create new native thread"); | |
2695 } | |
2696 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), | |
2697 "unable to create new native thread"); | |
2698 } | |
2699 | |
2700 Thread::start(native_thread); | |
2701 | |
2702 JVM_END | |
2703 | |
2704 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints | |
2705 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, | |
2706 // but is thought to be reliable and simple. In the case, where the receiver is the | |
2707 // save thread as the sender, no safepoint is needed. | |
2708 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) | |
2709 JVMWrapper("JVM_StopThread"); | |
2710 | |
2711 oop java_throwable = JNIHandles::resolve(throwable); | |
2712 if (java_throwable == NULL) { | |
2713 THROW(vmSymbols::java_lang_NullPointerException()); | |
2714 } | |
2715 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2716 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2717 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable); | |
2718 // First check if thread already exited | |
2719 if (receiver != NULL) { | |
2720 // Check if exception is getting thrown at self (use oop equality, since the | |
2721 // target object might exit) | |
2722 if (java_thread == thread->threadObj()) { | |
2723 // This is a change from JDK 1.1, but JDK 1.2 will also do it: | |
2724 // NOTE (from JDK 1.2): this is done solely to prevent stopped | |
2725 // threads from being restarted. | |
2726 // Fix for 4314342, 4145910, perhaps others: it now doesn't have | |
2727 // any effect on the "liveness" of a thread; see | |
2728 // JVM_IsThreadAlive, below. | |
1142 | 2729 if (java_throwable->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 2730 java_lang_Thread::set_stillborn(java_thread); |
2731 } | |
2732 THROW_OOP(java_throwable); | |
2733 } else { | |
2734 // Enques a VM_Operation to stop all threads and then deliver the exception... | |
2735 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); | |
2736 } | |
2737 } | |
2738 JVM_END | |
2739 | |
2740 | |
2741 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) | |
2742 JVMWrapper("JVM_IsThreadAlive"); | |
2743 | |
2744 oop thread_oop = JNIHandles::resolve_non_null(jthread); | |
2745 return java_lang_Thread::is_alive(thread_oop); | |
2746 JVM_END | |
2747 | |
2748 | |
2749 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) | |
2750 JVMWrapper("JVM_SuspendThread"); | |
2751 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2752 JavaThread* receiver = java_lang_Thread::thread(java_thread); | |
2753 | |
2754 if (receiver != NULL) { | |
2755 // thread has run and has not exited (still on threads list) | |
2756 | |
2757 { | |
2758 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); | |
2759 if (receiver->is_external_suspend()) { | |
2760 // Don't allow nested external suspend requests. We can't return | |
2761 // an error from this interface so just ignore the problem. | |
2762 return; | |
2763 } | |
2764 if (receiver->is_exiting()) { // thread is in the process of exiting | |
2765 return; | |
2766 } | |
2767 receiver->set_external_suspend(); | |
2768 } | |
2769 | |
2770 // java_suspend() will catch threads in the process of exiting | |
2771 // and will ignore them. | |
2772 receiver->java_suspend(); | |
2773 | |
2774 // It would be nice to have the following assertion in all the | |
2775 // time, but it is possible for a racing resume request to have | |
2776 // resumed this thread right after we suspended it. Temporarily | |
2777 // enable this assertion if you are chasing a different kind of | |
2778 // bug. | |
2779 // | |
2780 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || | |
2781 // receiver->is_being_ext_suspended(), "thread is not suspended"); | |
2782 } | |
2783 JVM_END | |
2784 | |
2785 | |
2786 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) | |
2787 JVMWrapper("JVM_ResumeThread"); | |
2788 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. | |
2789 // We need to *always* get the threads lock here, since this operation cannot be allowed during | |
2790 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other | |
2791 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code | |
2792 // looks at it. | |
2793 MutexLocker ml(Threads_lock); | |
2794 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2795 if (thr != NULL) { | |
2796 // the thread has run and is not in the process of exiting | |
2797 thr->java_resume(); | |
2798 } | |
2799 JVM_END | |
2800 | |
2801 | |
2802 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) | |
2803 JVMWrapper("JVM_SetThreadPriority"); | |
2804 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2805 MutexLocker ml(Threads_lock); | |
2806 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2807 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); | |
2808 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
2809 if (thr != NULL) { // Thread not yet started; priority pushed down when it is | |
2810 Thread::set_priority(thr, (ThreadPriority)prio); | |
2811 } | |
2812 JVM_END | |
2813 | |
2814 | |
2815 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) | |
2816 JVMWrapper("JVM_Yield"); | |
2817 if (os::dont_yield()) return; | |
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1144
diff
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|
2818 HS_DTRACE_PROBE0(hotspot, thread__yield); |
0 | 2819 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. |
2820 // Critical for similar threading behaviour | |
2821 if (ConvertYieldToSleep) { | |
2822 os::sleep(thread, MinSleepInterval, false); | |
2823 } else { | |
2824 os::yield(); | |
2825 } | |
2826 JVM_END | |
2827 | |
2828 | |
2829 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) | |
2830 JVMWrapper("JVM_Sleep"); | |
2831 | |
2832 if (millis < 0) { | |
2833 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); | |
2834 } | |
2835 | |
2836 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { | |
2837 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2838 } | |
2839 | |
2840 // Save current thread state and restore it at the end of this block. | |
2841 // And set new thread state to SLEEPING. | |
2842 JavaThreadSleepState jtss(thread); | |
2843 | |
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diff
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|
2844 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); |
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diff
changeset
|
2845 |
0 | 2846 if (millis == 0) { |
2847 // When ConvertSleepToYield is on, this matches the classic VM implementation of | |
2848 // JVM_Sleep. Critical for similar threading behaviour (Win32) | |
2849 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep | |
2850 // for SOLARIS | |
2851 if (ConvertSleepToYield) { | |
2852 os::yield(); | |
2853 } else { | |
2854 ThreadState old_state = thread->osthread()->get_state(); | |
2855 thread->osthread()->set_state(SLEEPING); | |
2856 os::sleep(thread, MinSleepInterval, false); | |
2857 thread->osthread()->set_state(old_state); | |
2858 } | |
2859 } else { | |
2860 ThreadState old_state = thread->osthread()->get_state(); | |
2861 thread->osthread()->set_state(SLEEPING); | |
2862 if (os::sleep(thread, millis, true) == OS_INTRPT) { | |
2863 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on | |
2864 // us while we were sleeping. We do not overwrite those. | |
2865 if (!HAS_PENDING_EXCEPTION) { | |
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diff
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|
2866 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); |
0 | 2867 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() |
2868 // to properly restore the thread state. That's likely wrong. | |
2869 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); | |
2870 } | |
2871 } | |
2872 thread->osthread()->set_state(old_state); | |
2873 } | |
1324
e392695de029
6935224: Adding new DTrace probes to work with Palantir
fparain
parents:
1144
diff
changeset
|
2874 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); |
0 | 2875 JVM_END |
2876 | |
2877 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) | |
2878 JVMWrapper("JVM_CurrentThread"); | |
2879 oop jthread = thread->threadObj(); | |
2880 assert (thread != NULL, "no current thread!"); | |
2881 return JNIHandles::make_local(env, jthread); | |
2882 JVM_END | |
2883 | |
2884 | |
2885 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) | |
2886 JVMWrapper("JVM_CountStackFrames"); | |
2887 | |
2888 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2889 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2890 bool throw_illegal_thread_state = false; | |
2891 int count = 0; | |
2892 | |
2893 { | |
2894 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2895 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2896 // acquire of the lock | |
2897 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2898 | |
2899 if (thr == NULL) { | |
2900 // do nothing | |
2901 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { | |
2902 // Check whether this java thread has been suspended already. If not, throws | |
2903 // IllegalThreadStateException. We defer to throw that exception until | |
2904 // Threads_lock is released since loading exception class has to leave VM. | |
2905 // The correct way to test a thread is actually suspended is | |
2906 // wait_for_ext_suspend_completion(), but we can't call that while holding | |
2907 // the Threads_lock. The above tests are sufficient for our purposes | |
2908 // provided the walkability of the stack is stable - which it isn't | |
2909 // 100% but close enough for most practical purposes. | |
2910 throw_illegal_thread_state = true; | |
2911 } else { | |
2912 // Count all java activation, i.e., number of vframes | |
2913 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { | |
2914 // Native frames are not counted | |
2915 if (!vfst.method()->is_native()) count++; | |
2916 } | |
2917 } | |
2918 } | |
2919 | |
2920 if (throw_illegal_thread_state) { | |
2921 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), | |
2922 "this thread is not suspended"); | |
2923 } | |
2924 return count; | |
2925 JVM_END | |
2926 | |
2927 // Consider: A better way to implement JVM_Interrupt() is to acquire | |
2928 // Threads_lock to resolve the jthread into a Thread pointer, fetch | |
2929 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., | |
2930 // drop Threads_lock, and the perform the unpark() and thr_kill() operations | |
2931 // outside the critical section. Threads_lock is hot so we want to minimize | |
2932 // the hold-time. A cleaner interface would be to decompose interrupt into | |
2933 // two steps. The 1st phase, performed under Threads_lock, would return | |
2934 // a closure that'd be invoked after Threads_lock was dropped. | |
2935 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and | |
2936 // admit spurious wakeups. | |
2937 | |
2938 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) | |
2939 JVMWrapper("JVM_Interrupt"); | |
2940 | |
2941 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2942 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2943 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2944 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2945 // acquire of the lock | |
2946 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2947 if (thr != NULL) { | |
2948 Thread::interrupt(thr); | |
2949 } | |
2950 JVM_END | |
2951 | |
2952 | |
2953 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) | |
2954 JVMWrapper("JVM_IsInterrupted"); | |
2955 | |
2956 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
2957 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
2958 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); | |
2959 // We need to re-resolve the java_thread, since a GC might have happened during the | |
2960 // acquire of the lock | |
2961 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); | |
2962 if (thr == NULL) { | |
2963 return JNI_FALSE; | |
2964 } else { | |
2965 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); | |
2966 } | |
2967 JVM_END | |
2968 | |
2969 | |
2970 // Return true iff the current thread has locked the object passed in | |
2971 | |
2972 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) | |
2973 JVMWrapper("JVM_HoldsLock"); | |
2974 assert(THREAD->is_Java_thread(), "sanity check"); | |
2975 if (obj == NULL) { | |
2976 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
2977 } | |
2978 Handle h_obj(THREAD, JNIHandles::resolve(obj)); | |
2979 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); | |
2980 JVM_END | |
2981 | |
2982 | |
2983 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) | |
2984 JVMWrapper("JVM_DumpAllStacks"); | |
2985 VM_PrintThreads op; | |
2986 VMThread::execute(&op); | |
2987 if (JvmtiExport::should_post_data_dump()) { | |
2988 JvmtiExport::post_data_dump(); | |
2989 } | |
2990 JVM_END | |
2991 | |
2992 | |
2993 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// | |
2994 | |
2995 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { | |
2996 assert(jthread->is_Java_thread(), "must be a Java thread"); | |
2997 if (jthread->privileged_stack_top() == NULL) return false; | |
2998 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { | |
2999 oop loader = jthread->privileged_stack_top()->class_loader(); | |
3000 if (loader == NULL) return true; | |
3001 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
3002 if (trusted) return true; | |
3003 } | |
3004 return false; | |
3005 } | |
3006 | |
3007 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) | |
3008 JVMWrapper("JVM_CurrentLoadedClass"); | |
3009 ResourceMark rm(THREAD); | |
3010 | |
3011 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3012 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
3013 bool trusted = is_trusted_frame(thread, &vfst); | |
3014 if (trusted) return NULL; | |
3015 | |
3016 methodOop m = vfst.method(); | |
3017 if (!m->is_native()) { | |
3018 klassOop holder = m->method_holder(); | |
3019 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3020 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3021 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); | |
3022 } | |
3023 } | |
3024 } | |
3025 return NULL; | |
3026 JVM_END | |
3027 | |
3028 | |
3029 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) | |
3030 JVMWrapper("JVM_CurrentClassLoader"); | |
3031 ResourceMark rm(THREAD); | |
3032 | |
3033 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3034 | |
3035 // if a method in a class in a trusted loader is in a doPrivileged, return NULL | |
3036 bool trusted = is_trusted_frame(thread, &vfst); | |
3037 if (trusted) return NULL; | |
3038 | |
3039 methodOop m = vfst.method(); | |
3040 if (!m->is_native()) { | |
3041 klassOop holder = m->method_holder(); | |
3042 assert(holder->is_klass(), "just checking"); | |
3043 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3044 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3045 return JNIHandles::make_local(env, loader); | |
3046 } | |
3047 } | |
3048 } | |
3049 return NULL; | |
3050 JVM_END | |
3051 | |
3052 | |
3053 // Utility object for collecting method holders walking down the stack | |
3054 class KlassLink: public ResourceObj { | |
3055 public: | |
3056 KlassHandle klass; | |
3057 KlassLink* next; | |
3058 | |
3059 KlassLink(KlassHandle k) { klass = k; next = NULL; } | |
3060 }; | |
3061 | |
3062 | |
3063 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) | |
3064 JVMWrapper("JVM_GetClassContext"); | |
3065 ResourceMark rm(THREAD); | |
3066 JvmtiVMObjectAllocEventCollector oam; | |
3067 // Collect linked list of (handles to) method holders | |
3068 KlassLink* first = NULL; | |
3069 KlassLink* last = NULL; | |
3070 int depth = 0; | |
3071 | |
3072 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { | |
3073 // Native frames are not returned | |
3074 if (!vfst.method()->is_native()) { | |
3075 klassOop holder = vfst.method()->method_holder(); | |
3076 assert(holder->is_klass(), "just checking"); | |
3077 depth++; | |
3078 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); | |
3079 if (first == NULL) { | |
3080 first = last = l; | |
3081 } else { | |
3082 last->next = l; | |
3083 last = l; | |
3084 } | |
3085 } | |
3086 } | |
3087 | |
3088 // Create result array of type [Ljava/lang/Class; | |
1142 | 3089 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL); |
0 | 3090 // Fill in mirrors corresponding to method holders |
3091 int index = 0; | |
3092 while (first != NULL) { | |
3093 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); | |
3094 first = first->next; | |
3095 } | |
3096 assert(index == depth, "just checking"); | |
3097 | |
3098 return (jobjectArray) JNIHandles::make_local(env, result); | |
3099 JVM_END | |
3100 | |
3101 | |
3102 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) | |
3103 JVMWrapper("JVM_ClassDepth"); | |
3104 ResourceMark rm(THREAD); | |
3105 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); | |
3106 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); | |
3107 | |
3108 const char* str = java_lang_String::as_utf8_string(class_name_str()); | |
3109 symbolHandle class_name_sym = | |
3110 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str))); | |
3111 if (class_name_sym.is_null()) { | |
3112 return -1; | |
3113 } | |
3114 | |
3115 int depth = 0; | |
3116 | |
3117 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3118 if (!vfst.method()->is_native()) { | |
3119 klassOop holder = vfst.method()->method_holder(); | |
3120 assert(holder->is_klass(), "just checking"); | |
3121 if (instanceKlass::cast(holder)->name() == class_name_sym()) { | |
3122 return depth; | |
3123 } | |
3124 depth++; | |
3125 } | |
3126 } | |
3127 return -1; | |
3128 JVM_END | |
3129 | |
3130 | |
3131 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) | |
3132 JVMWrapper("JVM_ClassLoaderDepth"); | |
3133 ResourceMark rm(THREAD); | |
3134 int depth = 0; | |
3135 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3136 // if a method in a class in a trusted loader is in a doPrivileged, return -1 | |
3137 bool trusted = is_trusted_frame(thread, &vfst); | |
3138 if (trusted) return -1; | |
3139 | |
3140 methodOop m = vfst.method(); | |
3141 if (!m->is_native()) { | |
3142 klassOop holder = m->method_holder(); | |
3143 assert(holder->is_klass(), "just checking"); | |
3144 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3145 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { | |
3146 return depth; | |
3147 } | |
3148 depth++; | |
3149 } | |
3150 } | |
3151 return -1; | |
3152 JVM_END | |
3153 | |
3154 | |
3155 // java.lang.Package //////////////////////////////////////////////////////////////// | |
3156 | |
3157 | |
3158 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) | |
3159 JVMWrapper("JVM_GetSystemPackage"); | |
3160 ResourceMark rm(THREAD); | |
3161 JvmtiVMObjectAllocEventCollector oam; | |
3162 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); | |
3163 oop result = ClassLoader::get_system_package(str, CHECK_NULL); | |
3164 return (jstring) JNIHandles::make_local(result); | |
3165 JVM_END | |
3166 | |
3167 | |
3168 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) | |
3169 JVMWrapper("JVM_GetSystemPackages"); | |
3170 JvmtiVMObjectAllocEventCollector oam; | |
3171 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); | |
3172 return (jobjectArray) JNIHandles::make_local(result); | |
3173 JVM_END | |
3174 | |
3175 | |
3176 // ObjectInputStream /////////////////////////////////////////////////////////////// | |
3177 | |
3178 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { | |
3179 if (current_class == NULL) { | |
3180 return true; | |
3181 } | |
3182 if ((current_class == field_class) || access.is_public()) { | |
3183 return true; | |
3184 } | |
3185 | |
3186 if (access.is_protected()) { | |
3187 // See if current_class is a subclass of field_class | |
3188 if (Klass::cast(current_class)->is_subclass_of(field_class)) { | |
3189 return true; | |
3190 } | |
3191 } | |
3192 | |
3193 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); | |
3194 } | |
3195 | |
3196 | |
3197 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 | |
3198 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) | |
3199 JVMWrapper("JVM_AllocateNewObject"); | |
3200 JvmtiVMObjectAllocEventCollector oam; | |
3201 // Receiver is not used | |
3202 oop curr_mirror = JNIHandles::resolve_non_null(currClass); | |
3203 oop init_mirror = JNIHandles::resolve_non_null(initClass); | |
3204 | |
3205 // Cannot instantiate primitive types | |
3206 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { | |
3207 ResourceMark rm(THREAD); | |
3208 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3209 } | |
3210 | |
3211 // Arrays not allowed here, must use JVM_AllocateNewArray | |
3212 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || | |
3213 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { | |
3214 ResourceMark rm(THREAD); | |
3215 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3216 } | |
3217 | |
3218 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); | |
3219 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); | |
3220 | |
3221 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); | |
3222 | |
3223 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. | |
3224 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); | |
3225 | |
3226 // Make sure klass is initialized, since we are about to instantiate one of them. | |
3227 curr_klass->initialize(CHECK_NULL); | |
3228 | |
3229 methodHandle m (THREAD, | |
3230 init_klass->find_method(vmSymbols::object_initializer_name(), | |
3231 vmSymbols::void_method_signature())); | |
3232 if (m.is_null()) { | |
3233 ResourceMark rm(THREAD); | |
3234 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), | |
3235 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), | |
3236 vmSymbols::object_initializer_name(), | |
3237 vmSymbols::void_method_signature())); | |
3238 } | |
3239 | |
3240 if (curr_klass == init_klass && !m->is_public()) { | |
3241 // Calling the constructor for class 'curr_klass'. | |
3242 // Only allow calls to a public no-arg constructor. | |
3243 // This path corresponds to creating an Externalizable object. | |
3244 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3245 } | |
3246 | |
3247 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { | |
3248 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' | |
3249 THROW_0(vmSymbols::java_lang_IllegalAccessException()); | |
3250 } | |
3251 | |
3252 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); | |
3253 // Call constructor m. This might call a constructor higher up in the hierachy | |
3254 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); | |
3255 | |
3256 return JNIHandles::make_local(obj()); | |
3257 JVM_END | |
3258 | |
3259 | |
3260 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) | |
3261 JVMWrapper("JVM_AllocateNewArray"); | |
3262 JvmtiVMObjectAllocEventCollector oam; | |
3263 oop mirror = JNIHandles::resolve_non_null(currClass); | |
3264 | |
3265 if (java_lang_Class::is_primitive(mirror)) { | |
3266 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3267 } | |
3268 klassOop k = java_lang_Class::as_klassOop(mirror); | |
3269 oop result; | |
3270 | |
3271 if (k->klass_part()->oop_is_typeArray()) { | |
3272 // typeArray | |
3273 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); | |
3274 } else if (k->klass_part()->oop_is_objArray()) { | |
3275 // objArray | |
3276 objArrayKlassHandle oak(THREAD, k); | |
3277 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) | |
3278 result = oak->allocate(length, CHECK_NULL); | |
3279 } else { | |
3280 THROW_0(vmSymbols::java_lang_InvalidClassException()); | |
3281 } | |
3282 return JNIHandles::make_local(env, result); | |
3283 JVM_END | |
3284 | |
3285 | |
3286 // Return the first non-null class loader up the execution stack, or null | |
3287 // if only code from the null class loader is on the stack. | |
3288 | |
3289 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) | |
3290 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { | |
3291 // UseNewReflection | |
3292 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection | |
3293 klassOop holder = vfst.method()->method_holder(); | |
3294 oop loader = instanceKlass::cast(holder)->class_loader(); | |
3295 if (loader != NULL) { | |
3296 return JNIHandles::make_local(env, loader); | |
3297 } | |
3298 } | |
3299 return NULL; | |
3300 JVM_END | |
3301 | |
3302 | |
3303 // Load a class relative to the most recent class on the stack with a non-null | |
3304 // classloader. | |
3305 // This function has been deprecated and should not be considered part of the | |
3306 // specified JVM interface. | |
3307 | |
3308 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, | |
3309 jclass currClass, jstring currClassName)) | |
3310 JVMWrapper("JVM_LoadClass0"); | |
3311 // Receiver is not used | |
3312 ResourceMark rm(THREAD); | |
3313 | |
3314 // Class name argument is not guaranteed to be in internal format | |
3315 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); | |
3316 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); | |
3317 | |
3318 const char* str = java_lang_String::as_utf8_string(string()); | |
3319 | |
3320 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) { | |
3321 // It's impossible to create this class; the name cannot fit | |
3322 // into the constant pool. | |
3323 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); | |
3324 } | |
3325 | |
3326 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL); | |
3327 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); | |
3328 // Find the most recent class on the stack with a non-null classloader | |
3329 oop loader = NULL; | |
3330 oop protection_domain = NULL; | |
3331 if (curr_klass.is_null()) { | |
3332 for (vframeStream vfst(thread); | |
3333 !vfst.at_end() && loader == NULL; | |
3334 vfst.next()) { | |
3335 if (!vfst.method()->is_native()) { | |
3336 klassOop holder = vfst.method()->method_holder(); | |
3337 loader = instanceKlass::cast(holder)->class_loader(); | |
3338 protection_domain = instanceKlass::cast(holder)->protection_domain(); | |
3339 } | |
3340 } | |
3341 } else { | |
3342 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); | |
3343 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); | |
3344 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); | |
3345 } | |
3346 Handle h_loader(THREAD, loader); | |
3347 Handle h_prot (THREAD, protection_domain); | |
657
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
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parents:
579
diff
changeset
|
3348 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
|
3349 false, thread); |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3350 if (TraceClassResolution && result != NULL) { |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
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parents:
579
diff
changeset
|
3351 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
|
3352 } |
715dceaa89b7
6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
579
diff
changeset
|
3353 return result; |
0 | 3354 JVM_END |
3355 | |
3356 | |
3357 // Array /////////////////////////////////////////////////////////////////////////////////////////// | |
3358 | |
3359 | |
3360 // resolve array handle and check arguments | |
3361 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { | |
3362 if (arr == NULL) { | |
3363 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
3364 } | |
3365 oop a = JNIHandles::resolve_non_null(arr); | |
3366 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { | |
3367 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); | |
3368 } | |
3369 return arrayOop(a); | |
3370 } | |
3371 | |
3372 | |
3373 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) | |
3374 JVMWrapper("JVM_GetArrayLength"); | |
3375 arrayOop a = check_array(env, arr, false, CHECK_0); | |
3376 return a->length(); | |
3377 JVM_END | |
3378 | |
3379 | |
3380 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) | |
3381 JVMWrapper("JVM_Array_Get"); | |
3382 JvmtiVMObjectAllocEventCollector oam; | |
3383 arrayOop a = check_array(env, arr, false, CHECK_NULL); | |
3384 jvalue value; | |
3385 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); | |
3386 oop box = Reflection::box(&value, type, CHECK_NULL); | |
3387 return JNIHandles::make_local(env, box); | |
3388 JVM_END | |
3389 | |
3390 | |
3391 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) | |
3392 JVMWrapper("JVM_GetPrimitiveArrayElement"); | |
3393 jvalue value; | |
3394 value.i = 0; // to initialize value before getting used in CHECK | |
3395 arrayOop a = check_array(env, arr, true, CHECK_(value)); | |
3396 assert(a->is_typeArray(), "just checking"); | |
3397 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); | |
3398 BasicType wide_type = (BasicType) wCode; | |
3399 if (type != wide_type) { | |
3400 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
3401 } | |
3402 return value; | |
3403 JVM_END | |
3404 | |
3405 | |
3406 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) | |
3407 JVMWrapper("JVM_SetArrayElement"); | |
3408 arrayOop a = check_array(env, arr, false, CHECK); | |
3409 oop box = JNIHandles::resolve(val); | |
3410 jvalue value; | |
3411 value.i = 0; // to initialize value before getting used in CHECK | |
3412 BasicType value_type; | |
3413 if (a->is_objArray()) { | |
3414 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
3415 value_type = Reflection::unbox_for_regular_object(box, &value); | |
3416 } else { | |
3417 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
3418 } | |
3419 Reflection::array_set(&value, a, index, value_type, CHECK); | |
3420 JVM_END | |
3421 | |
3422 | |
3423 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) | |
3424 JVMWrapper("JVM_SetPrimitiveArrayElement"); | |
3425 arrayOop a = check_array(env, arr, true, CHECK); | |
3426 assert(a->is_typeArray(), "just checking"); | |
3427 BasicType value_type = (BasicType) vCode; | |
3428 Reflection::array_set(&v, a, index, value_type, CHECK); | |
3429 JVM_END | |
3430 | |
3431 | |
3432 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) | |
3433 JVMWrapper("JVM_NewArray"); | |
3434 JvmtiVMObjectAllocEventCollector oam; | |
3435 oop element_mirror = JNIHandles::resolve(eltClass); | |
3436 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); | |
3437 return JNIHandles::make_local(env, result); | |
3438 JVM_END | |
3439 | |
3440 | |
3441 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) | |
3442 JVMWrapper("JVM_NewMultiArray"); | |
3443 JvmtiVMObjectAllocEventCollector oam; | |
3444 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); | |
3445 oop element_mirror = JNIHandles::resolve(eltClass); | |
3446 assert(dim_array->is_typeArray(), "just checking"); | |
3447 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); | |
3448 return JNIHandles::make_local(env, result); | |
3449 JVM_END | |
3450 | |
3451 | |
3452 // Networking library support //////////////////////////////////////////////////////////////////// | |
3453 | |
3454 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) | |
3455 JVMWrapper("JVM_InitializeSocketLibrary"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3456 return 0; |
0 | 3457 JVM_END |
3458 | |
3459 | |
3460 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) | |
3461 JVMWrapper("JVM_Socket"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3462 return os::socket(domain, type, protocol); |
0 | 3463 JVM_END |
3464 | |
3465 | |
3466 JVM_LEAF(jint, JVM_SocketClose(jint fd)) | |
3467 JVMWrapper2("JVM_SocketClose (0x%x)", fd); | |
3468 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3469 return os::socket_close(fd); |
0 | 3470 JVM_END |
3471 | |
3472 | |
3473 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) | |
3474 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); | |
3475 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3476 return os::socket_shutdown(fd, howto); |
0 | 3477 JVM_END |
3478 | |
3479 | |
3480 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) | |
3481 JVMWrapper2("JVM_Recv (0x%x)", fd); | |
3482 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3483 return os::recv(fd, buf, nBytes, flags); |
0 | 3484 JVM_END |
3485 | |
3486 | |
3487 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) | |
3488 JVMWrapper2("JVM_Send (0x%x)", fd); | |
3489 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3490 return os::send(fd, buf, nBytes, flags); |
0 | 3491 JVM_END |
3492 | |
3493 | |
3494 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) | |
3495 JVMWrapper2("JVM_Timeout (0x%x)", fd); | |
3496 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3497 return os::timeout(fd, timeout); |
0 | 3498 JVM_END |
3499 | |
3500 | |
3501 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) | |
3502 JVMWrapper2("JVM_Listen (0x%x)", fd); | |
3503 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3504 return os::listen(fd, count); |
0 | 3505 JVM_END |
3506 | |
3507 | |
3508 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) | |
3509 JVMWrapper2("JVM_Connect (0x%x)", fd); | |
3510 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3511 return os::connect(fd, him, len); |
0 | 3512 JVM_END |
3513 | |
3514 | |
3515 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) | |
3516 JVMWrapper2("JVM_Bind (0x%x)", fd); | |
3517 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3518 return os::bind(fd, him, len); |
0 | 3519 JVM_END |
3520 | |
3521 | |
3522 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) | |
3523 JVMWrapper2("JVM_Accept (0x%x)", fd); | |
3524 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3525 return os::accept(fd, him, (int *)len); |
0 | 3526 JVM_END |
3527 | |
3528 | |
3529 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) | |
3530 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); | |
3531 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3532 return os::recvfrom(fd, buf, nBytes, flags, from, fromlen); |
0 | 3533 JVM_END |
3534 | |
3535 | |
3536 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) | |
3537 JVMWrapper2("JVM_GetSockName (0x%x)", fd); | |
3538 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3539 return os::get_sock_name(fd, him, len); |
0 | 3540 JVM_END |
3541 | |
3542 | |
3543 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) | |
3544 JVMWrapper2("JVM_SendTo (0x%x)", fd); | |
3545 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3546 return os::sendto(fd, buf, len, flags, to, tolen); |
0 | 3547 JVM_END |
3548 | |
3549 | |
3550 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) | |
3551 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); | |
3552 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3553 return os::socket_available(fd, pbytes); |
0 | 3554 JVM_END |
3555 | |
3556 | |
3557 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) | |
3558 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3559 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3560 return os::get_sock_opt(fd, level, optname, optval, optlen); |
0 | 3561 JVM_END |
3562 | |
3563 | |
3564 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) | |
3565 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); | |
3566 //%note jvm_r6 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3567 return os::set_sock_opt(fd, level, optname, optval, optlen); |
0 | 3568 JVM_END |
3569 | |
3570 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) | |
3571 JVMWrapper("JVM_GetHostName"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3572 return os::get_host_name(name, namelen); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3573 JVM_END |
0 | 3574 |
3575 // Library support /////////////////////////////////////////////////////////////////////////// | |
3576 | |
3577 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) | |
3578 //%note jvm_ct | |
3579 JVMWrapper2("JVM_LoadLibrary (%s)", name); | |
3580 char ebuf[1024]; | |
3581 void *load_result; | |
3582 { | |
3583 ThreadToNativeFromVM ttnfvm(thread); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3584 load_result = os::dll_load(name, ebuf, sizeof ebuf); |
0 | 3585 } |
3586 if (load_result == NULL) { | |
3587 char msg[1024]; | |
3588 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); | |
3589 // Since 'ebuf' may contain a string encoded using | |
3590 // platform encoding scheme, we need to pass | |
3591 // Exceptions::unsafe_to_utf8 to the new_exception method | |
3592 // as the last argument. See bug 6367357. | |
3593 Handle h_exception = | |
3594 Exceptions::new_exception(thread, | |
3595 vmSymbols::java_lang_UnsatisfiedLinkError(), | |
3596 msg, Exceptions::unsafe_to_utf8); | |
3597 | |
3598 THROW_HANDLE_0(h_exception); | |
3599 } | |
3600 return load_result; | |
3601 JVM_END | |
3602 | |
3603 | |
3604 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) | |
3605 JVMWrapper("JVM_UnloadLibrary"); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3606 os::dll_unload(handle); |
0 | 3607 JVM_END |
3608 | |
3609 | |
3610 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) | |
3611 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3612 return os::dll_lookup(handle, name); |
0 | 3613 JVM_END |
3614 | |
3615 // Floating point support //////////////////////////////////////////////////////////////////// | |
3616 | |
3617 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) | |
3618 JVMWrapper("JVM_IsNaN"); | |
3619 return g_isnan(a); | |
3620 JVM_END | |
3621 | |
3622 | |
3623 | |
3624 // JNI version /////////////////////////////////////////////////////////////////////////////// | |
3625 | |
3626 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) | |
3627 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); | |
3628 return Threads::is_supported_jni_version_including_1_1(version); | |
3629 JVM_END | |
3630 | |
3631 | |
3632 // String support /////////////////////////////////////////////////////////////////////////// | |
3633 | |
3634 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) | |
3635 JVMWrapper("JVM_InternString"); | |
3636 JvmtiVMObjectAllocEventCollector oam; | |
3637 if (str == NULL) return NULL; | |
3638 oop string = JNIHandles::resolve_non_null(str); | |
3639 oop result = StringTable::intern(string, CHECK_NULL); | |
3640 return (jstring) JNIHandles::make_local(env, result); | |
3641 JVM_END | |
3642 | |
3643 | |
3644 // Raw monitor support ////////////////////////////////////////////////////////////////////// | |
3645 | |
3646 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock | |
3647 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because | |
3648 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check | |
3649 // that only works with java threads. | |
3650 | |
3651 | |
3652 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { | |
3653 VM_Exit::block_if_vm_exited(); | |
3654 JVMWrapper("JVM_RawMonitorCreate"); | |
3655 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); | |
3656 } | |
3657 | |
3658 | |
3659 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { | |
3660 VM_Exit::block_if_vm_exited(); | |
3661 JVMWrapper("JVM_RawMonitorDestroy"); | |
3662 delete ((Mutex*) mon); | |
3663 } | |
3664 | |
3665 | |
3666 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { | |
3667 VM_Exit::block_if_vm_exited(); | |
3668 JVMWrapper("JVM_RawMonitorEnter"); | |
3669 ((Mutex*) mon)->jvm_raw_lock(); | |
3670 return 0; | |
3671 } | |
3672 | |
3673 | |
3674 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { | |
3675 VM_Exit::block_if_vm_exited(); | |
3676 JVMWrapper("JVM_RawMonitorExit"); | |
3677 ((Mutex*) mon)->jvm_raw_unlock(); | |
3678 } | |
3679 | |
3680 | |
3681 // Support for Serialization | |
3682 | |
3683 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); | |
3684 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); | |
3685 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); | |
3686 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); | |
3687 | |
3688 static IntBitsToFloatFn int_bits_to_float_fn = NULL; | |
3689 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; | |
3690 static FloatToIntBitsFn float_to_int_bits_fn = NULL; | |
3691 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; | |
3692 | |
3693 | |
3694 void initialize_converter_functions() { | |
3695 if (JDK_Version::is_gte_jdk14x_version()) { | |
3696 // These functions only exist for compatibility with 1.3.1 and earlier | |
3697 return; | |
3698 } | |
3699 | |
3700 // called from universe_post_init() | |
3701 assert( | |
3702 int_bits_to_float_fn == NULL && | |
3703 long_bits_to_double_fn == NULL && | |
3704 float_to_int_bits_fn == NULL && | |
3705 double_to_long_bits_fn == NULL , | |
3706 "initialization done twice" | |
3707 ); | |
3708 // initialize | |
3709 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); | |
3710 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); | |
3711 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); | |
3712 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); | |
3713 // verify | |
3714 assert( | |
3715 int_bits_to_float_fn != NULL && | |
3716 long_bits_to_double_fn != NULL && | |
3717 float_to_int_bits_fn != NULL && | |
3718 double_to_long_bits_fn != NULL , | |
3719 "initialization failed" | |
3720 ); | |
3721 } | |
3722 | |
3723 | |
3724 // Serialization | |
3725 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3726 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3727 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3728 | |
3729 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3730 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3731 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3732 oop o = JNIHandles::resolve(obj); | |
3733 | |
3734 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3735 THROW(vmSymbols::java_lang_NullPointerException()); | |
3736 } | |
3737 | |
3738 jsize nfids = fids->length(); | |
3739 if (nfids == 0) return; | |
3740 | |
3741 if (tcodes->length() < nfids) { | |
3742 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3743 } | |
3744 | |
3745 jsize off = 0; | |
3746 /* loop through fields, setting values */ | |
3747 for (jsize i = 0; i < nfids; i++) { | |
3748 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3749 int field_offset; | |
3750 if (fid != NULL) { | |
3751 // NULL is a legal value for fid, but retrieving the field offset | |
3752 // trigger assertion in that case | |
3753 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3754 } | |
3755 | |
3756 switch (tcodes->char_at(i)) { | |
3757 case 'Z': | |
3758 if (fid != NULL) { | |
3759 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; | |
3760 o->bool_field_put(field_offset, val); | |
3761 } | |
3762 off++; | |
3763 break; | |
3764 | |
3765 case 'B': | |
3766 if (fid != NULL) { | |
3767 o->byte_field_put(field_offset, dbuf->byte_at(off)); | |
3768 } | |
3769 off++; | |
3770 break; | |
3771 | |
3772 case 'C': | |
3773 if (fid != NULL) { | |
3774 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3775 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3776 o->char_field_put(field_offset, val); | |
3777 } | |
3778 off += 2; | |
3779 break; | |
3780 | |
3781 case 'S': | |
3782 if (fid != NULL) { | |
3783 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) | |
3784 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); | |
3785 o->short_field_put(field_offset, val); | |
3786 } | |
3787 off += 2; | |
3788 break; | |
3789 | |
3790 case 'I': | |
3791 if (fid != NULL) { | |
3792 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3793 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3794 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3795 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3796 o->int_field_put(field_offset, ival); | |
3797 } | |
3798 off += 4; | |
3799 break; | |
3800 | |
3801 case 'F': | |
3802 if (fid != NULL) { | |
3803 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) | |
3804 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) | |
3805 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) | |
3806 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); | |
3807 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); | |
3808 o->float_field_put(field_offset, fval); | |
3809 } | |
3810 off += 4; | |
3811 break; | |
3812 | |
3813 case 'J': | |
3814 if (fid != NULL) { | |
3815 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3816 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3817 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3818 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3819 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3820 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3821 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3822 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3823 o->long_field_put(field_offset, lval); | |
3824 } | |
3825 off += 8; | |
3826 break; | |
3827 | |
3828 case 'D': | |
3829 if (fid != NULL) { | |
3830 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) | |
3831 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) | |
3832 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) | |
3833 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) | |
3834 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) | |
3835 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) | |
3836 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) | |
3837 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); | |
3838 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); | |
3839 o->double_field_put(field_offset, dval); | |
3840 } | |
3841 off += 8; | |
3842 break; | |
3843 | |
3844 default: | |
3845 // Illegal typecode | |
3846 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
3847 } | |
3848 } | |
3849 JVM_END | |
3850 | |
3851 | |
3852 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, | |
3853 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) | |
3854 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); | |
3855 | |
3856 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); | |
3857 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); | |
3858 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); | |
3859 oop o = JNIHandles::resolve(obj); | |
3860 | |
3861 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { | |
3862 THROW(vmSymbols::java_lang_NullPointerException()); | |
3863 } | |
3864 | |
3865 jsize nfids = fids->length(); | |
3866 if (nfids == 0) return; | |
3867 | |
3868 if (tcodes->length() < nfids) { | |
3869 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); | |
3870 } | |
3871 | |
3872 /* loop through fields, fetching values */ | |
3873 jsize off = 0; | |
3874 for (jsize i = 0; i < nfids; i++) { | |
3875 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); | |
3876 if (fid == NULL) { | |
3877 THROW(vmSymbols::java_lang_NullPointerException()); | |
3878 } | |
3879 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
3880 | |
3881 switch (tcodes->char_at(i)) { | |
3882 case 'Z': | |
3883 { | |
3884 jboolean val = o->bool_field(field_offset); | |
3885 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); | |
3886 } | |
3887 break; | |
3888 | |
3889 case 'B': | |
3890 dbuf->byte_at_put(off++, o->byte_field(field_offset)); | |
3891 break; | |
3892 | |
3893 case 'C': | |
3894 { | |
3895 jchar val = o->char_field(field_offset); | |
3896 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3897 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3898 } | |
3899 break; | |
3900 | |
3901 case 'S': | |
3902 { | |
3903 jshort val = o->short_field(field_offset); | |
3904 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3905 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3906 } | |
3907 break; | |
3908 | |
3909 case 'I': | |
3910 { | |
3911 jint val = o->int_field(field_offset); | |
3912 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3913 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3914 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3915 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3916 } | |
3917 break; | |
3918 | |
3919 case 'F': | |
3920 { | |
3921 jfloat fval = o->float_field(field_offset); | |
3922 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); | |
3923 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); | |
3924 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); | |
3925 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); | |
3926 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); | |
3927 } | |
3928 break; | |
3929 | |
3930 case 'J': | |
3931 { | |
3932 jlong val = o->long_field(field_offset); | |
3933 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); | |
3934 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); | |
3935 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); | |
3936 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); | |
3937 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); | |
3938 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); | |
3939 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); | |
3940 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); | |
3941 } | |
3942 break; | |
3943 | |
3944 case 'D': | |
3945 { | |
3946 jdouble dval = o->double_field(field_offset); | |
3947 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); | |
3948 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); | |
3949 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); | |
3950 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); | |
3951 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); | |
3952 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); | |
3953 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); | |
3954 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); | |
3955 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); | |
3956 } | |
3957 break; | |
3958 | |
3959 default: | |
3960 // Illegal typecode | |
3961 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); | |
3962 } | |
3963 } | |
3964 JVM_END | |
3965 | |
3966 | |
3967 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// | |
3968 | |
3969 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { | |
3970 // Security Note: | |
3971 // The Java level wrapper will perform the necessary security check allowing | |
3972 // us to pass the NULL as the initiating class loader. | |
3973 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); | |
878
abe076e3636f
6864003: Modify JVM_FindClassFromBootLoader to return null if class not found
mchung
parents:
875
diff
changeset
|
3974 |
0 | 3975 KlassHandle klass_handle(THREAD, klass); |
3976 // Check if we should initialize the class | |
3977 if (init && klass_handle->oop_is_instance()) { | |
3978 klass_handle->initialize(CHECK_NULL); | |
3979 } | |
3980 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); | |
3981 } | |
3982 | |
3983 | |
3984 // Internal SQE debugging support /////////////////////////////////////////////////////////// | |
3985 | |
3986 #ifndef PRODUCT | |
3987 | |
3988 extern "C" { | |
3989 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); | |
3990 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); | |
3991 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); | |
3992 } | |
3993 | |
3994 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) | |
3995 JVMWrapper("JVM_AccessBoolVMFlag"); | |
3996 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); | |
3997 JVM_END | |
3998 | |
3999 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) | |
4000 JVMWrapper("JVM_AccessVMIntFlag"); | |
4001 intx v; | |
4002 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); | |
4003 *value = (jint)v; | |
4004 return result; | |
4005 JVM_END | |
4006 | |
4007 | |
4008 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) | |
4009 JVMWrapper("JVM_VMBreakPoint"); | |
4010 oop the_obj = JNIHandles::resolve(obj); | |
4011 BREAKPOINT; | |
4012 JVM_END | |
4013 | |
4014 | |
4015 #endif | |
4016 | |
4017 | |
4018 //--------------------------------------------------------------------------- | |
4019 // | |
4020 // Support for old native code-based reflection (pre-JDK 1.4) | |
4021 // Disabled by default in the product build. | |
4022 // | |
4023 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION | |
4024 // | |
4025 //--------------------------------------------------------------------------- | |
4026 | |
4027 #ifdef SUPPORT_OLD_REFLECTION | |
4028 | |
4029 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which)) | |
4030 JVMWrapper("JVM_GetClassFields"); | |
4031 JvmtiVMObjectAllocEventCollector oam; | |
4032 oop mirror = JNIHandles::resolve_non_null(cls); | |
4033 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL); | |
4034 return (jobjectArray) JNIHandles::make_local(env, result); | |
4035 JVM_END | |
4036 | |
4037 | |
4038 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which)) | |
4039 JVMWrapper("JVM_GetClassMethods"); | |
4040 JvmtiVMObjectAllocEventCollector oam; | |
4041 oop mirror = JNIHandles::resolve_non_null(cls); | |
4042 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL); | |
4043 //%note jvm_r4 | |
4044 return (jobjectArray) JNIHandles::make_local(env, result); | |
4045 JVM_END | |
4046 | |
4047 | |
4048 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which)) | |
4049 JVMWrapper("JVM_GetClassConstructors"); | |
4050 JvmtiVMObjectAllocEventCollector oam; | |
4051 oop mirror = JNIHandles::resolve_non_null(cls); | |
4052 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL); | |
4053 //%note jvm_r4 | |
4054 return (jobjectArray) JNIHandles::make_local(env, result); | |
4055 JVM_END | |
4056 | |
4057 | |
4058 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which)) | |
4059 JVMWrapper("JVM_GetClassField"); | |
4060 JvmtiVMObjectAllocEventCollector oam; | |
4061 if (name == NULL) return NULL; | |
4062 Handle str (THREAD, JNIHandles::resolve_non_null(name)); | |
4063 | |
4064 const char* cstr = java_lang_String::as_utf8_string(str()); | |
4065 symbolHandle field_name = | |
4066 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); | |
4067 if (field_name.is_null()) { | |
4068 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); | |
4069 } | |
4070 | |
4071 oop mirror = JNIHandles::resolve_non_null(cls); | |
4072 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL); | |
4073 if (result == NULL) { | |
4074 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); | |
4075 } | |
4076 return JNIHandles::make_local(env, result); | |
4077 JVM_END | |
4078 | |
4079 | |
4080 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which)) | |
4081 JVMWrapper("JVM_GetClassMethod"); | |
4082 JvmtiVMObjectAllocEventCollector oam; | |
4083 if (name == NULL) { | |
4084 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
4085 } | |
4086 Handle str (THREAD, JNIHandles::resolve_non_null(name)); | |
4087 | |
4088 const char* cstr = java_lang_String::as_utf8_string(str()); | |
4089 symbolHandle method_name = | |
4090 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); | |
4091 if (method_name.is_null()) { | |
4092 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
4093 } | |
4094 | |
4095 oop mirror = JNIHandles::resolve_non_null(cls); | |
4096 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); | |
4097 oop result = Reflection::reflect_method(mirror, method_name, tarray, | |
4098 which, CHECK_NULL); | |
4099 if (result == NULL) { | |
4100 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
4101 } | |
4102 return JNIHandles::make_local(env, result); | |
4103 JVM_END | |
4104 | |
4105 | |
4106 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which)) | |
4107 JVMWrapper("JVM_GetClassConstructor"); | |
4108 JvmtiVMObjectAllocEventCollector oam; | |
4109 oop mirror = JNIHandles::resolve_non_null(cls); | |
4110 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); | |
4111 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL); | |
4112 if (result == NULL) { | |
4113 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); | |
4114 } | |
4115 return (jobject) JNIHandles::make_local(env, result); | |
4116 JVM_END | |
4117 | |
4118 | |
4119 // Instantiation /////////////////////////////////////////////////////////////////////////////// | |
4120 | |
4121 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls)) | |
4122 JVMWrapper("JVM_NewInstance"); | |
4123 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls)); | |
4124 | |
4125 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror()); | |
4126 if (resolved_constructor == NULL) { | |
4127 klassOop k = java_lang_Class::as_klassOop(mirror()); | |
4128 // The java.lang.Class object caches a resolved constructor if all the checks | |
4129 // below were done successfully and a constructor was found. | |
4130 | |
4131 // Do class based checks | |
4132 if (java_lang_Class::is_primitive(mirror())) { | |
4133 const char* msg = ""; | |
4134 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean"; | |
4135 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character"; | |
4136 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float"; | |
4137 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double"; | |
4138 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte"; | |
4139 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short"; | |
4140 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer"; | |
4141 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long"; | |
4142 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg); | |
4143 } | |
4144 | |
4145 // Check whether we are allowed to instantiate this class | |
4146 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here | |
4147 instanceKlassHandle klass(THREAD, k); | |
4148 // Make sure class is initialized (also so all methods are rewritten) | |
4149 klass->initialize(CHECK_NULL); | |
4150 | |
4151 // Lookup default constructor | |
4152 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature()); | |
4153 if (resolved_constructor == NULL) { | |
4154 ResourceMark rm(THREAD); | |
4155 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name()); | |
4156 } | |
4157 | |
4158 // Cache result in java.lang.Class object. Does not have to be MT safe. | |
4159 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor); | |
4160 } | |
4161 | |
4162 assert(resolved_constructor != NULL, "sanity check"); | |
4163 methodHandle constructor = methodHandle(THREAD, resolved_constructor); | |
4164 | |
4165 // We have an initialized instanceKlass with a default constructor | |
4166 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); | |
4167 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check"); | |
4168 | |
4169 // Do security check | |
4170 klassOop caller_klass = NULL; | |
4171 if (UsePrivilegedStack) { | |
4172 caller_klass = thread->security_get_caller_class(2); | |
4173 | |
4174 if (!Reflection::verify_class_access(caller_klass, klass(), false) || | |
4175 !Reflection::verify_field_access(caller_klass, | |
4176 klass(), | |
4177 klass(), | |
4178 constructor->access_flags(), | |
4179 false, | |
4180 true)) { | |
4181 ResourceMark rm(THREAD); | |
4182 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name()); | |
4183 } | |
4184 } | |
4185 | |
4186 // Allocate object and call constructor | |
4187 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); | |
4188 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL); | |
4189 | |
4190 jobject res = JNIHandles::make_local(env, receiver()); | |
4191 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4192 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver()); | |
4193 } | |
4194 return res; | |
4195 JVM_END | |
4196 | |
4197 | |
4198 // Field //////////////////////////////////////////////////////////////////////////////////////////// | |
4199 | |
4200 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj)) | |
4201 JVMWrapper("JVM_GetField"); | |
4202 JvmtiVMObjectAllocEventCollector oam; | |
4203 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4204 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4205 fieldDescriptor fd; | |
4206 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL); | |
4207 jvalue value; | |
4208 BasicType type = Reflection::field_get(&value, &fd, receiver); | |
4209 oop box = Reflection::box(&value, type, CHECK_NULL); | |
4210 return JNIHandles::make_local(env, box); | |
4211 JVM_END | |
4212 | |
4213 | |
4214 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode)) | |
4215 JVMWrapper("JVM_GetPrimitiveField"); | |
4216 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4217 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4218 fieldDescriptor fd; | |
4219 jvalue value; | |
4220 value.j = 0; | |
4221 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value)); | |
4222 BasicType type = Reflection::field_get(&value, &fd, receiver); | |
4223 BasicType wide_type = (BasicType) wCode; | |
4224 if (type != wide_type) { | |
4225 Reflection::widen(&value, type, wide_type, CHECK_(value)); | |
4226 } | |
4227 return value; | |
4228 JVM_END // should really be JVM_END, but that doesn't work for union types! | |
4229 | |
4230 | |
4231 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val)) | |
4232 JVMWrapper("JVM_SetField"); | |
4233 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4234 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4235 oop box = JNIHandles::resolve(val); | |
4236 fieldDescriptor fd; | |
4237 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); | |
4238 BasicType field_type = fd.field_type(); | |
4239 jvalue value; | |
4240 BasicType value_type; | |
4241 if (field_type == T_OBJECT || field_type == T_ARRAY) { | |
4242 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array | |
4243 value_type = Reflection::unbox_for_regular_object(box, &value); | |
4244 Reflection::field_set(&value, &fd, receiver, field_type, CHECK); | |
4245 } else { | |
4246 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); | |
4247 Reflection::field_set(&value, &fd, receiver, value_type, CHECK); | |
4248 } | |
4249 JVM_END | |
4250 | |
4251 | |
4252 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode)) | |
4253 JVMWrapper("JVM_SetPrimitiveField"); | |
4254 Handle field_mirror(thread, JNIHandles::resolve(field)); | |
4255 Handle receiver (thread, JNIHandles::resolve(obj)); | |
4256 fieldDescriptor fd; | |
4257 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); | |
4258 BasicType value_type = (BasicType) vCode; | |
4259 Reflection::field_set(&v, &fd, receiver, value_type, CHECK); | |
4260 JVM_END | |
4261 | |
4262 | |
4263 // Method /////////////////////////////////////////////////////////////////////////////////////////// | |
4264 | |
4265 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) | |
4266 JVMWrapper("JVM_InvokeMethod"); | |
4267 Handle method_handle; | |
4268 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { | |
4269 method_handle = Handle(THREAD, JNIHandles::resolve(method)); | |
4270 Handle receiver(THREAD, JNIHandles::resolve(obj)); | |
4271 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4272 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); | |
4273 jobject res = JNIHandles::make_local(env, result); | |
4274 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4275 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); | |
4276 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); | |
4277 if (java_lang_Class::is_primitive(ret_type)) { | |
4278 // Only for primitive type vm allocates memory for java object. | |
4279 // See box() method. | |
4280 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4281 } | |
4282 } | |
4283 return res; | |
4284 } else { | |
4285 THROW_0(vmSymbols::java_lang_StackOverflowError()); | |
4286 } | |
4287 JVM_END | |
4288 | |
4289 | |
4290 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) | |
4291 JVMWrapper("JVM_NewInstanceFromConstructor"); | |
4292 oop constructor_mirror = JNIHandles::resolve(c); | |
4293 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); | |
4294 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); | |
4295 jobject res = JNIHandles::make_local(env, result); | |
4296 if (JvmtiExport::should_post_vm_object_alloc()) { | |
4297 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); | |
4298 } | |
4299 return res; | |
4300 JVM_END | |
4301 | |
4302 #endif /* SUPPORT_OLD_REFLECTION */ | |
4303 | |
4304 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// | |
4305 | |
4306 JVM_LEAF(jboolean, JVM_SupportsCX8()) | |
4307 JVMWrapper("JVM_SupportsCX8"); | |
4308 return VM_Version::supports_cx8(); | |
4309 JVM_END | |
4310 | |
4311 | |
4312 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) | |
4313 JVMWrapper("JVM_CX8Field"); | |
4314 jlong res; | |
4315 oop o = JNIHandles::resolve(obj); | |
4316 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); | |
4317 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); | |
4318 | |
4319 assert(VM_Version::supports_cx8(), "cx8 not supported"); | |
4320 res = Atomic::cmpxchg(newVal, addr, oldVal); | |
4321 | |
4322 return res == oldVal; | |
4323 JVM_END | |
4324 | |
116
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4325 // DTrace /////////////////////////////////////////////////////////////////// |
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4326 |
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4327 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) |
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4328 JVMWrapper("JVM_DTraceGetVersion"); |
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4329 return (jint)JVM_TRACING_DTRACE_VERSION; |
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4330 JVM_END |
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4331 |
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4332 JVM_ENTRY(jlong,JVM_DTraceActivate( |
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4333 JNIEnv* env, jint version, jstring module_name, jint providers_count, |
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4334 JVM_DTraceProvider* providers)) |
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4335 JVMWrapper("JVM_DTraceActivate"); |
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4336 return DTraceJSDT::activate( |
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4337 version, module_name, providers_count, providers, CHECK_0); |
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4338 JVM_END |
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4339 |
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4340 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) |
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4341 JVMWrapper("JVM_DTraceIsProbeEnabled"); |
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4342 return DTraceJSDT::is_probe_enabled(method); |
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4343 JVM_END |
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4344 |
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4345 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) |
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4346 JVMWrapper("JVM_DTraceDispose"); |
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4347 DTraceJSDT::dispose(handle); |
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4348 JVM_END |
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4349 |
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4350 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) |
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4351 JVMWrapper("JVM_DTraceIsSupported"); |
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4352 return DTraceJSDT::is_supported(); |
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4353 JVM_END |
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4354 |
0 | 4355 // Returns an array of all live Thread objects (VM internal JavaThreads, |
4356 // jvmti agent threads, and JNI attaching threads are skipped) | |
4357 // See CR 6404306 regarding JNI attaching threads | |
4358 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) | |
4359 ResourceMark rm(THREAD); | |
4360 ThreadsListEnumerator tle(THREAD, false, false); | |
4361 JvmtiVMObjectAllocEventCollector oam; | |
4362 | |
4363 int num_threads = tle.num_threads(); | |
1142 | 4364 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); |
0 | 4365 objArrayHandle threads_ah(THREAD, r); |
4366 | |
4367 for (int i = 0; i < num_threads; i++) { | |
4368 Handle h = tle.get_threadObj(i); | |
4369 threads_ah->obj_at_put(i, h()); | |
4370 } | |
4371 | |
4372 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); | |
4373 JVM_END | |
4374 | |
4375 | |
4376 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods | |
4377 // Return StackTraceElement[][], each element is the stack trace of a thread in | |
4378 // the corresponding entry in the given threads array | |
4379 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) | |
4380 JVMWrapper("JVM_DumpThreads"); | |
4381 JvmtiVMObjectAllocEventCollector oam; | |
4382 | |
4383 // Check if threads is null | |
4384 if (threads == NULL) { | |
4385 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4386 } | |
4387 | |
4388 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); | |
4389 objArrayHandle ah(THREAD, a); | |
4390 int num_threads = ah->length(); | |
4391 // check if threads is non-empty array | |
4392 if (num_threads == 0) { | |
4393 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); | |
4394 } | |
4395 | |
4396 // check if threads is not an array of objects of Thread class | |
4397 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); | |
1142 | 4398 if (k != SystemDictionary::Thread_klass()) { |
0 | 4399 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); |
4400 } | |
4401 | |
4402 ResourceMark rm(THREAD); | |
4403 | |
4404 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); | |
4405 for (int i = 0; i < num_threads; i++) { | |
4406 oop thread_obj = ah->obj_at(i); | |
4407 instanceHandle h(THREAD, (instanceOop) thread_obj); | |
4408 thread_handle_array->append(h); | |
4409 } | |
4410 | |
4411 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); | |
4412 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); | |
4413 | |
4414 JVM_END | |
4415 | |
4416 // JVM monitoring and management support | |
4417 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) | |
4418 return Management::get_jmm_interface(version); | |
4419 JVM_END | |
4420 | |
4421 // com.sun.tools.attach.VirtualMachine agent properties support | |
4422 // | |
4423 // Initialize the agent properties with the properties maintained in the VM | |
4424 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) | |
4425 JVMWrapper("JVM_InitAgentProperties"); | |
4426 ResourceMark rm; | |
4427 | |
4428 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); | |
4429 | |
4430 PUTPROP(props, "sun.java.command", Arguments::java_command()); | |
4431 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); | |
4432 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); | |
4433 return properties; | |
4434 JVM_END | |
4435 | |
4436 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) | |
4437 { | |
4438 JVMWrapper("JVM_GetEnclosingMethodInfo"); | |
4439 JvmtiVMObjectAllocEventCollector oam; | |
4440 | |
4441 if (ofClass == NULL) { | |
4442 return NULL; | |
4443 } | |
4444 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); | |
4445 // Special handling for primitive objects | |
4446 if (java_lang_Class::is_primitive(mirror())) { | |
4447 return NULL; | |
4448 } | |
4449 klassOop k = java_lang_Class::as_klassOop(mirror()); | |
4450 if (!Klass::cast(k)->oop_is_instance()) { | |
4451 return NULL; | |
4452 } | |
4453 instanceKlassHandle ik_h(THREAD, k); | |
4454 int encl_method_class_idx = ik_h->enclosing_method_class_index(); | |
4455 if (encl_method_class_idx == 0) { | |
4456 return NULL; | |
4457 } | |
1142 | 4458 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); |
0 | 4459 objArrayHandle dest(THREAD, dest_o); |
4460 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); | |
4461 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); | |
4462 int encl_method_method_idx = ik_h->enclosing_method_method_index(); | |
4463 if (encl_method_method_idx != 0) { | |
4464 symbolOop sym_o = ik_h->constants()->symbol_at( | |
4465 extract_low_short_from_int( | |
4466 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4467 symbolHandle sym(THREAD, sym_o); | |
4468 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4469 dest->obj_at_put(1, str()); | |
4470 sym_o = ik_h->constants()->symbol_at( | |
4471 extract_high_short_from_int( | |
4472 ik_h->constants()->name_and_type_at(encl_method_method_idx))); | |
4473 sym = symbolHandle(THREAD, sym_o); | |
4474 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); | |
4475 dest->obj_at_put(2, str()); | |
4476 } | |
4477 return (jobjectArray) JNIHandles::make_local(dest()); | |
4478 } | |
4479 JVM_END | |
4480 | |
4481 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, | |
4482 jint javaThreadState)) | |
4483 { | |
4484 // If new thread states are added in future JDK and VM versions, | |
4485 // this should check if the JDK version is compatible with thread | |
4486 // states supported by the VM. Return NULL if not compatible. | |
4487 // | |
4488 // This function must map the VM java_lang_Thread::ThreadStatus | |
4489 // to the Java thread state that the JDK supports. | |
4490 // | |
4491 | |
4492 typeArrayHandle values_h; | |
4493 switch (javaThreadState) { | |
4494 case JAVA_THREAD_STATE_NEW : { | |
4495 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4496 values_h = typeArrayHandle(THREAD, r); | |
4497 values_h->int_at_put(0, java_lang_Thread::NEW); | |
4498 break; | |
4499 } | |
4500 case JAVA_THREAD_STATE_RUNNABLE : { | |
4501 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4502 values_h = typeArrayHandle(THREAD, r); | |
4503 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); | |
4504 break; | |
4505 } | |
4506 case JAVA_THREAD_STATE_BLOCKED : { | |
4507 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4508 values_h = typeArrayHandle(THREAD, r); | |
4509 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); | |
4510 break; | |
4511 } | |
4512 case JAVA_THREAD_STATE_WAITING : { | |
4513 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); | |
4514 values_h = typeArrayHandle(THREAD, r); | |
4515 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); | |
4516 values_h->int_at_put(1, java_lang_Thread::PARKED); | |
4517 break; | |
4518 } | |
4519 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4520 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); | |
4521 values_h = typeArrayHandle(THREAD, r); | |
4522 values_h->int_at_put(0, java_lang_Thread::SLEEPING); | |
4523 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); | |
4524 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); | |
4525 break; | |
4526 } | |
4527 case JAVA_THREAD_STATE_TERMINATED : { | |
4528 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); | |
4529 values_h = typeArrayHandle(THREAD, r); | |
4530 values_h->int_at_put(0, java_lang_Thread::TERMINATED); | |
4531 break; | |
4532 } | |
4533 default: | |
4534 // Unknown state - probably incompatible JDK version | |
4535 return NULL; | |
4536 } | |
4537 | |
4538 return (jintArray) JNIHandles::make_local(env, values_h()); | |
4539 } | |
4540 JVM_END | |
4541 | |
4542 | |
4543 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, | |
4544 jint javaThreadState, | |
4545 jintArray values)) | |
4546 { | |
4547 // If new thread states are added in future JDK and VM versions, | |
4548 // this should check if the JDK version is compatible with thread | |
4549 // states supported by the VM. Return NULL if not compatible. | |
4550 // | |
4551 // This function must map the VM java_lang_Thread::ThreadStatus | |
4552 // to the Java thread state that the JDK supports. | |
4553 // | |
4554 | |
4555 ResourceMark rm; | |
4556 | |
4557 // Check if threads is null | |
4558 if (values == NULL) { | |
4559 THROW_(vmSymbols::java_lang_NullPointerException(), 0); | |
4560 } | |
4561 | |
4562 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); | |
4563 typeArrayHandle values_h(THREAD, v); | |
4564 | |
4565 objArrayHandle names_h; | |
4566 switch (javaThreadState) { | |
4567 case JAVA_THREAD_STATE_NEW : { | |
4568 assert(values_h->length() == 1 && | |
4569 values_h->int_at(0) == java_lang_Thread::NEW, | |
4570 "Invalid threadStatus value"); | |
4571 | |
1142 | 4572 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4573 1, /* only 1 substate */ |
4574 CHECK_NULL); | |
4575 names_h = objArrayHandle(THREAD, r); | |
4576 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); | |
4577 names_h->obj_at_put(0, name()); | |
4578 break; | |
4579 } | |
4580 case JAVA_THREAD_STATE_RUNNABLE : { | |
4581 assert(values_h->length() == 1 && | |
4582 values_h->int_at(0) == java_lang_Thread::RUNNABLE, | |
4583 "Invalid threadStatus value"); | |
4584 | |
1142 | 4585 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4586 1, /* only 1 substate */ |
4587 CHECK_NULL); | |
4588 names_h = objArrayHandle(THREAD, r); | |
4589 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); | |
4590 names_h->obj_at_put(0, name()); | |
4591 break; | |
4592 } | |
4593 case JAVA_THREAD_STATE_BLOCKED : { | |
4594 assert(values_h->length() == 1 && | |
4595 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, | |
4596 "Invalid threadStatus value"); | |
4597 | |
1142 | 4598 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4599 1, /* only 1 substate */ |
4600 CHECK_NULL); | |
4601 names_h = objArrayHandle(THREAD, r); | |
4602 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); | |
4603 names_h->obj_at_put(0, name()); | |
4604 break; | |
4605 } | |
4606 case JAVA_THREAD_STATE_WAITING : { | |
4607 assert(values_h->length() == 2 && | |
4608 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && | |
4609 values_h->int_at(1) == java_lang_Thread::PARKED, | |
4610 "Invalid threadStatus value"); | |
1142 | 4611 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4612 2, /* number of substates */ |
4613 CHECK_NULL); | |
4614 names_h = objArrayHandle(THREAD, r); | |
4615 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", | |
4616 CHECK_NULL); | |
4617 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", | |
4618 CHECK_NULL); | |
4619 names_h->obj_at_put(0, name0()); | |
4620 names_h->obj_at_put(1, name1()); | |
4621 break; | |
4622 } | |
4623 case JAVA_THREAD_STATE_TIMED_WAITING : { | |
4624 assert(values_h->length() == 3 && | |
4625 values_h->int_at(0) == java_lang_Thread::SLEEPING && | |
4626 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && | |
4627 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, | |
4628 "Invalid threadStatus value"); | |
1142 | 4629 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4630 3, /* number of substates */ |
4631 CHECK_NULL); | |
4632 names_h = objArrayHandle(THREAD, r); | |
4633 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", | |
4634 CHECK_NULL); | |
4635 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", | |
4636 CHECK_NULL); | |
4637 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", | |
4638 CHECK_NULL); | |
4639 names_h->obj_at_put(0, name0()); | |
4640 names_h->obj_at_put(1, name1()); | |
4641 names_h->obj_at_put(2, name2()); | |
4642 break; | |
4643 } | |
4644 case JAVA_THREAD_STATE_TERMINATED : { | |
4645 assert(values_h->length() == 1 && | |
4646 values_h->int_at(0) == java_lang_Thread::TERMINATED, | |
4647 "Invalid threadStatus value"); | |
1142 | 4648 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 4649 1, /* only 1 substate */ |
4650 CHECK_NULL); | |
4651 names_h = objArrayHandle(THREAD, r); | |
4652 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); | |
4653 names_h->obj_at_put(0, name()); | |
4654 break; | |
4655 } | |
4656 default: | |
4657 // Unknown state - probably incompatible JDK version | |
4658 return NULL; | |
4659 } | |
4660 return (jobjectArray) JNIHandles::make_local(env, names_h()); | |
4661 } | |
4662 JVM_END | |
4663 | |
4664 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) | |
4665 { | |
4666 memset(info, 0, sizeof(info_size)); | |
4667 | |
4668 info->jvm_version = Abstract_VM_Version::jvm_version(); | |
4669 info->update_version = 0; /* 0 in HotSpot Express VM */ | |
4670 info->special_update_version = 0; /* 0 in HotSpot Express VM */ | |
4671 | |
4672 // when we add a new capability in the jvm_version_info struct, we should also | |
4673 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat | |
4674 // counter defined in runtimeService.cpp. | |
4675 info->is_attachable = AttachListener::is_attach_supported(); | |
4676 #ifdef KERNEL | |
4677 info->is_kernel_jvm = 1; // true; | |
4678 #else // KERNEL | |
4679 info->is_kernel_jvm = 0; // false; | |
4680 #endif // KERNEL | |
4681 } | |
4682 JVM_END |