1 /* 2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 27 #include "memory/universe.hpp" 28 #include "oops/oop.inline.hpp" 29 30 #include "classfile/symbolTable.hpp" 31 #include "classfile/classLoaderData.hpp" 32 33 #include "prims/whitebox.hpp" 34 #include "prims/wbtestmethods/parserTests.hpp" 35 36 #include "runtime/interfaceSupport.hpp" 37 #include "runtime/os.hpp" 38 #include "utilities/debug.hpp" 39 #include "utilities/macros.hpp" 40 #include "utilities/exceptions.hpp" 41 42 #if INCLUDE_ALL_GCS 43 #include "gc_implementation/g1/concurrentMark.hpp" 44 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 45 #include "gc_implementation/g1/heapRegionRemSet.hpp" 46 #endif // INCLUDE_ALL_GCS 47 48 #ifdef INCLUDE_NMT 49 #include "services/memTracker.hpp" 50 #endif // INCLUDE_NMT 51 52 #include "compiler/compileBroker.hpp" 53 #include "runtime/compilationPolicy.hpp" 54 55 bool WhiteBox::_used = false; 56 57 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) 58 return (jlong)(void*)JNIHandles::resolve(obj); 59 WB_END 60 61 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) 62 return heapOopSize; 63 WB_END 64 65 66 class WBIsKlassAliveClosure : public KlassClosure { 67 Symbol* _name; 68 bool _found; 69 public: 70 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} 71 72 void do_klass(Klass* k) { 73 if (_found) return; 74 Symbol* ksym = k->name(); 75 if (ksym->fast_compare(_name) == 0) { 76 _found = true; 77 } 78 } 79 80 bool found() const { 81 return _found; 82 } 83 }; 84 85 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) 86 Handle h_name = JNIHandles::resolve(name); 87 if (h_name.is_null()) return false; 88 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); 89 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return 90 91 WBIsKlassAliveClosure closure(sym); 92 ClassLoaderDataGraph::classes_do(&closure); 93 94 return closure.found(); 95 WB_END 96 97 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) { 98 CollectorPolicy * p = Universe::heap()->collector_policy(); 99 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap " 100 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Min alignment "SIZE_FORMAT" Max alignment "SIZE_FORMAT, 101 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(), 102 p->min_alignment(), p->max_alignment()); 103 } 104 WB_END 105 106 #if INCLUDE_ALL_GCS 107 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) 108 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 109 oop result = JNIHandles::resolve(obj); 110 const HeapRegion* hr = g1->heap_region_containing(result); 111 return hr->isHumongous(); 112 WB_END 113 114 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) 115 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 116 size_t nr = g1->free_regions(); 117 return (jlong)nr; 118 WB_END 119 120 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) 121 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 122 ConcurrentMark* cm = g1->concurrent_mark(); 123 return cm->concurrent_marking_in_progress(); 124 WB_END 125 126 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) 127 return (jint)HeapRegion::GrainBytes; 128 WB_END 129 #endif // INCLUDE_ALL_GCS 130 131 #ifdef INCLUDE_NMT 132 // Alloc memory using the test memory type so that we can use that to see if 133 // NMT picks it up correctly 134 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size)) 135 jlong addr = 0; 136 137 if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) { 138 addr = (jlong)(uintptr_t)os::malloc(size, mtTest); 139 } 140 141 return addr; 142 WB_END 143 144 // Free the memory allocated by NMTAllocTest 145 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem)) 146 os::free((void*)(uintptr_t)mem, mtTest); 147 WB_END 148 149 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size)) 150 jlong addr = 0; 151 152 if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) { 153 addr = (jlong)(uintptr_t)os::reserve_memory(size); 154 MemTracker::record_virtual_memory_type((address)addr, mtTest); 155 } 156 157 return addr; 158 WB_END 159 160 161 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 162 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem); 163 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest); 164 WB_END 165 166 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 167 os::uncommit_memory((char *)(uintptr_t)addr, size); 168 WB_END 169 170 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 171 os::release_memory((char *)(uintptr_t)addr, size); 172 WB_END 173 174 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature 175 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env)) 176 177 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { 178 return false; 179 } 180 181 return MemTracker::wbtest_wait_for_data_merge(); 182 WB_END 183 184 #endif // INCLUDE_NMT 185 186 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) { 187 assert(method != NULL, "method should not be null"); 188 ThreadToNativeFromVM ttn(thread); 189 return env->FromReflectedMethod(method); 190 } 191 192 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o)) 193 MutexLockerEx mu(Compile_lock); 194 CodeCache::mark_all_nmethods_for_deoptimization(); 195 VM_Deoptimize op; 196 VMThread::execute(&op); 197 WB_END 198 199 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 200 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 201 MutexLockerEx mu(Compile_lock); 202 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 203 int result = 0; 204 nmethod* code; 205 if (is_osr) { 206 int bci = InvocationEntryBci; 207 while ((code = mh->lookup_osr_nmethod_for(bci, CompLevel_none, false)) != NULL) { 208 code->mark_for_deoptimization(); 209 ++result; 210 bci = code->osr_entry_bci() + 1; 211 } 212 } else { 213 code = mh->code(); 214 } 215 if (code != NULL) { 216 code->mark_for_deoptimization(); 217 ++result; 218 } 219 result += CodeCache::mark_for_deoptimization(mh()); 220 if (result > 0) { 221 VM_Deoptimize op; 222 VMThread::execute(&op); 223 } 224 return result; 225 WB_END 226 227 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 228 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 229 MutexLockerEx mu(Compile_lock); 230 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 231 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 232 if (code == NULL) { 233 return JNI_FALSE; 234 } 235 return (code->is_alive() && !code->is_marked_for_deoptimization()); 236 WB_END 237 238 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 239 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 240 MutexLockerEx mu(Compile_lock); 241 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 242 if (is_osr) { 243 return CompilationPolicy::can_be_osr_compiled(mh, comp_level); 244 } else { 245 return CompilationPolicy::can_be_compiled(mh, comp_level); 246 } 247 WB_END 248 249 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method)) 250 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 251 MutexLockerEx mu(Compile_lock); 252 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 253 return mh->queued_for_compilation(); 254 WB_END 255 256 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 257 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 258 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 259 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 260 return (code != NULL ? code->comp_level() : CompLevel_none); 261 WB_END 262 263 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 264 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 265 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 266 if (is_osr) { 267 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox"); 268 } else { 269 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox"); 270 } 271 WB_END 272 273 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method)) 274 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 275 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 276 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false); 277 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci); 278 WB_END 279 280 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 281 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 282 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 283 bool result = mh->dont_inline(); 284 mh->set_dont_inline(value == JNI_TRUE); 285 return result; 286 WB_END 287 288 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level)) 289 if (comp_level == CompLevel_any) { 290 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ + 291 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */; 292 } else { 293 return CompileBroker::queue_size(comp_level); 294 } 295 WB_END 296 297 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 298 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 299 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 300 bool result = mh->force_inline(); 301 mh->set_force_inline(value == JNI_TRUE); 302 return result; 303 WB_END 304 305 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci)) 306 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 307 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 308 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD); 309 MutexLockerEx mu(Compile_lock); 310 return (mh->queued_for_compilation() || nm != NULL); 311 WB_END 312 313 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method)) 314 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 315 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 316 MutexLockerEx mu(Compile_lock); 317 MethodData* mdo = mh->method_data(); 318 MethodCounters* mcs = mh->method_counters(); 319 320 if (mdo != NULL) { 321 mdo->init(); 322 ResourceMark rm; 323 int arg_count = mdo->method()->size_of_parameters(); 324 for (int i = 0; i < arg_count; i++) { 325 mdo->set_arg_modified(i, 0); 326 } 327 } 328 329 mh->clear_not_c1_compilable(); 330 mh->clear_not_c2_compilable(); 331 mh->clear_not_c2_osr_compilable(); 332 NOT_PRODUCT(mh->set_compiled_invocation_count(0)); 333 if (mcs != NULL) { 334 mcs->backedge_counter()->init(); 335 mcs->invocation_counter()->init(); 336 mcs->set_interpreter_invocation_count(0); 337 mcs->set_interpreter_throwout_count(0); 338 339 #ifdef TIERED 340 mcs->set_rate(0.0F); 341 mh->set_prev_event_count(0, THREAD); 342 mh->set_prev_time(0, THREAD); 343 #endif 344 } 345 WB_END 346 347 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString)) 348 ResourceMark rm(THREAD); 349 int len; 350 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false); 351 return (StringTable::lookup(name, len) != NULL); 352 WB_END 353 354 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o)) 355 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true); 356 Universe::heap()->collect(GCCause::_last_ditch_collection); 357 WB_END 358 359 360 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o)) 361 // static+volatile in order to force the read to happen 362 // (not be eliminated by the compiler) 363 static char c; 364 static volatile char* p; 365 366 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0); 367 if (p == NULL) { 368 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory"); 369 } 370 371 c = *p; 372 WB_END 373 374 //Some convenience methods to deal with objects from java 375 int WhiteBox::offset_for_field(const char* field_name, oop object, 376 Symbol* signature_symbol) { 377 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); 378 Thread* THREAD = Thread::current(); 379 380 //Get the class of our object 381 Klass* arg_klass = object->klass(); 382 //Turn it into an instance-klass 383 InstanceKlass* ik = InstanceKlass::cast(arg_klass); 384 385 //Create symbols to look for in the class 386 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), 387 THREAD); 388 389 //To be filled in with an offset of the field we're looking for 390 fieldDescriptor fd; 391 392 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); 393 if (res == NULL) { 394 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), 395 name_symbol->as_C_string()); 396 fatal("Invalid layout of preloaded class"); 397 } 398 399 //fetch the field at the offset we've found 400 int dest_offset = fd.offset(); 401 402 return dest_offset; 403 } 404 405 406 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { 407 int offset = offset_for_field(field_name, object, 408 vmSymbols::string_signature()); 409 oop string = object->obj_field(offset); 410 if (string == NULL) { 411 return NULL; 412 } 413 const char* ret = java_lang_String::as_utf8_string(string); 414 return ret; 415 } 416 417 bool WhiteBox::lookup_bool(const char* field_name, oop object) { 418 int offset = 419 offset_for_field(field_name, object, vmSymbols::bool_signature()); 420 bool ret = (object->bool_field(offset) == JNI_TRUE); 421 return ret; 422 } 423 424 425 #define CC (char*) 426 427 static JNINativeMethod methods[] = { 428 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, 429 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, 430 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, 431 {CC"parseCommandLine", 432 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", 433 (void*) &WB_ParseCommandLine 434 }, 435 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes }, 436 #if INCLUDE_ALL_GCS 437 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, 438 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, 439 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, 440 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, 441 #endif // INCLUDE_ALL_GCS 442 #ifdef INCLUDE_NMT 443 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc }, 444 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree }, 445 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory }, 446 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory }, 447 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory }, 448 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory }, 449 {CC"NMTWaitForDataMerge", CC"()Z", (void*)&WB_NMTWaitForDataMerge}, 450 #endif // INCLUDE_NMT 451 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll }, 452 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I", 453 (void*)&WB_DeoptimizeMethod }, 454 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z", 455 (void*)&WB_IsMethodCompiled }, 456 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z", 457 (void*)&WB_IsMethodCompilable}, 458 {CC"isMethodQueuedForCompilation", 459 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation}, 460 {CC"makeMethodNotCompilable", 461 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable}, 462 {CC"testSetDontInlineMethod", 463 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod}, 464 {CC"getMethodCompilationLevel", 465 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel}, 466 {CC"getMethodEntryBci", 467 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci}, 468 {CC"getCompileQueueSize", 469 CC"(I)I", (void*)&WB_GetCompileQueueSize}, 470 {CC"testSetForceInlineMethod", 471 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod}, 472 {CC"enqueueMethodForCompilation", 473 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation}, 474 {CC"clearMethodState", 475 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState}, 476 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable }, 477 {CC"fullGC", CC"()V", (void*)&WB_FullGC }, 478 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory }, 479 }; 480 481 #undef CC 482 483 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) 484 { 485 if (WhiteBoxAPI) { 486 // Make sure that wbclass is loaded by the null classloader 487 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); 488 Handle loader(ikh->class_loader()); 489 if (loader.is_null()) { 490 ResourceMark rm; 491 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 492 bool result = true; 493 // one by one registration natives for exception catching 494 jclass exceptionKlass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string()); 495 for (int i = 0, n = sizeof(methods) / sizeof(methods[0]); i < n; ++i) { 496 if (env->RegisterNatives(wbclass, methods + i, 1) != 0) { 497 result = false; 498 if (env->ExceptionCheck() && env->IsInstanceOf(env->ExceptionOccurred(), exceptionKlass)) { 499 // j.l.NoSuchMethodError is thrown when a method can't be found or a method is not native 500 // ignoring the exception 501 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s", methods[i].name, methods[i].signature); 502 env->ExceptionClear(); 503 } else { 504 // register is failed w/o exception or w/ unexpected exception 505 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered", methods[i].name, methods[i].signature); 506 env->UnregisterNatives(wbclass); 507 break; 508 } 509 } 510 } 511 512 if (result) { 513 WhiteBox::set_used(); 514 } 515 } 516 } 517 } 518 JVM_END