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/thread.hpp" 37 #include "runtime/arguments.hpp" 38 #include "runtime/interfaceSupport.hpp" 39 #include "runtime/os.hpp" 40 41 #include "utilities/debug.hpp" 42 #include "utilities/macros.hpp" 43 #include "utilities/exceptions.hpp" 44 45 #if INCLUDE_ALL_GCS 46 #include "gc_implementation/g1/concurrentMark.hpp" 47 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 48 #include "gc_implementation/g1/heapRegionRemSet.hpp" 49 #endif // INCLUDE_ALL_GCS 50 51 #ifdef INCLUDE_NMT 52 #include "services/memTracker.hpp" 53 #endif // INCLUDE_NMT 54 55 #include "compiler/compileBroker.hpp" 56 #include "runtime/compilationPolicy.hpp" 57 58 #define SIZE_T_MAX_VALUE ((size_t) -1) 59 60 bool WhiteBox::_used = false; 61 62 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) 63 return (jlong)(void*)JNIHandles::resolve(obj); 64 WB_END 65 66 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) 67 return heapOopSize; 68 WB_END 69 70 71 class WBIsKlassAliveClosure : public KlassClosure { 72 Symbol* _name; 73 bool _found; 74 public: 75 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} 76 77 void do_klass(Klass* k) { 78 if (_found) return; 79 Symbol* ksym = k->name(); 80 if (ksym->fast_compare(_name) == 0) { 81 _found = true; 82 } 83 } 84 85 bool found() const { 86 return _found; 87 } 88 }; 89 90 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) 91 Handle h_name = JNIHandles::resolve(name); 92 if (h_name.is_null()) return false; 93 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); 94 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return 95 96 WBIsKlassAliveClosure closure(sym); 97 ClassLoaderDataGraph::classes_do(&closure); 98 99 return closure.found(); 100 WB_END 101 102 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) { 103 return (jlong)Arguments::max_heap_for_compressed_oops(); 104 } 105 WB_END 106 107 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) { 108 CollectorPolicy * p = Universe::heap()->collector_policy(); 109 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap " 110 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Min alignment "SIZE_FORMAT" Max alignment "SIZE_FORMAT, 111 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(), 112 p->space_alignment(), p->heap_alignment()); 113 } 114 WB_END 115 116 #ifndef PRODUCT 117 // Forward declaration 118 void TestReservedSpace_test(); 119 void TestReserveMemorySpecial_test(); 120 void TestVirtualSpace_test(); 121 void TestMetaspaceAux_test(); 122 #endif 123 124 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o)) 125 #ifndef PRODUCT 126 TestReservedSpace_test(); 127 TestReserveMemorySpecial_test(); 128 TestVirtualSpace_test(); 129 TestMetaspaceAux_test(); 130 #endif 131 WB_END 132 133 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o)) 134 size_t granularity = os::vm_allocation_granularity(); 135 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL); 136 VirtualSpace vs; 137 vs.initialize(rhs, 50 * granularity); 138 139 //Check if constraints are complied 140 if (!( UseCompressedOops && rhs.base() != NULL && 141 Universe::narrow_oop_base() != NULL && 142 Universe::narrow_oop_use_implicit_null_checks() )) { 143 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n " 144 "\tUseCompressedOops is %d\n" 145 "\trhs.base() is "PTR_FORMAT"\n" 146 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n" 147 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d", 148 UseCompressedOops, 149 rhs.base(), 150 Universe::narrow_oop_base(), 151 Universe::narrow_oop_use_implicit_null_checks()); 152 return; 153 } 154 tty->print_cr("Reading from no access area... "); 155 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c", 156 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 )); 157 WB_END 158 159 static jint wb_stress_virtual_space_resize(size_t reserved_space_size, 160 size_t magnitude, size_t iterations) { 161 size_t granularity = os::vm_allocation_granularity(); 162 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL); 163 VirtualSpace vs; 164 if (!vs.initialize(rhs, 0)) { 165 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed."); 166 return 3; 167 } 168 169 long seed = os::random(); 170 tty->print_cr("Random seed is %ld", seed); 171 os::init_random(seed); 172 173 for (size_t i = 0; i < iterations; i++) { 174 175 // Whether we will shrink or grow 176 bool shrink = os::random() % 2L == 0; 177 178 // Get random delta to resize virtual space 179 size_t delta = (size_t)os::random() % magnitude; 180 181 // If we are about to shrink virtual space below zero, then expand instead 182 if (shrink && vs.committed_size() < delta) { 183 shrink = false; 184 } 185 186 // Resizing by delta 187 if (shrink) { 188 vs.shrink_by(delta); 189 } else { 190 // If expanding fails expand_by will silently return false 191 vs.expand_by(delta, true); 192 } 193 } 194 return 0; 195 } 196 197 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o, 198 jlong reserved_space_size, jlong magnitude, jlong iterations)) 199 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", " 200 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude, 201 iterations); 202 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) { 203 tty->print_cr("One of variables printed above is negative. Can't proceed.\n"); 204 return 1; 205 } 206 207 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is 208 // always 8 byte. That's why we should avoid overflow in case of 32bit platform. 209 if (sizeof(size_t) < sizeof(jlong)) { 210 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE; 211 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value 212 || iterations > size_t_max_value) { 213 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n"); 214 return 2; 215 } 216 } 217 218 return wb_stress_virtual_space_resize((size_t) reserved_space_size, 219 (size_t) magnitude, (size_t) iterations); 220 WB_END 221 222 #if INCLUDE_ALL_GCS 223 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) 224 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 225 oop result = JNIHandles::resolve(obj); 226 const HeapRegion* hr = g1->heap_region_containing(result); 227 return hr->isHumongous(); 228 WB_END 229 230 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) 231 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 232 size_t nr = g1->free_regions(); 233 return (jlong)nr; 234 WB_END 235 236 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) 237 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 238 ConcurrentMark* cm = g1->concurrent_mark(); 239 return cm->concurrent_marking_in_progress(); 240 WB_END 241 242 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) 243 return (jint)HeapRegion::GrainBytes; 244 WB_END 245 #endif // INCLUDE_ALL_GCS 246 247 #if INCLUDE_NMT 248 // Alloc memory using the test memory type so that we can use that to see if 249 // NMT picks it up correctly 250 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size)) 251 jlong addr = 0; 252 253 if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) { 254 addr = (jlong)(uintptr_t)os::malloc(size, mtTest); 255 } 256 257 return addr; 258 WB_END 259 260 // Free the memory allocated by NMTAllocTest 261 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem)) 262 os::free((void*)(uintptr_t)mem, mtTest); 263 WB_END 264 265 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size)) 266 jlong addr = 0; 267 268 if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) { 269 addr = (jlong)(uintptr_t)os::reserve_memory(size); 270 MemTracker::record_virtual_memory_type((address)addr, mtTest); 271 } 272 273 return addr; 274 WB_END 275 276 277 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 278 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem); 279 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest); 280 WB_END 281 282 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 283 os::uncommit_memory((char *)(uintptr_t)addr, size); 284 WB_END 285 286 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 287 os::release_memory((char *)(uintptr_t)addr, size); 288 WB_END 289 290 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature 291 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env)) 292 293 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { 294 return false; 295 } 296 297 return MemTracker::wbtest_wait_for_data_merge(); 298 WB_END 299 300 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env)) 301 return MemTracker::tracking_level() == MemTracker::NMT_detail; 302 WB_END 303 304 #endif // INCLUDE_NMT 305 306 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) { 307 assert(method != NULL, "method should not be null"); 308 ThreadToNativeFromVM ttn(thread); 309 return env->FromReflectedMethod(method); 310 } 311 312 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o)) 313 MutexLockerEx mu(Compile_lock); 314 CodeCache::mark_all_nmethods_for_deoptimization(); 315 VM_Deoptimize op; 316 VMThread::execute(&op); 317 WB_END 318 319 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 320 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 321 MutexLockerEx mu(Compile_lock); 322 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 323 int result = 0; 324 nmethod* code; 325 if (is_osr) { 326 int bci = InvocationEntryBci; 327 while ((code = mh->lookup_osr_nmethod_for(bci, CompLevel_none, false)) != NULL) { 328 code->mark_for_deoptimization(); 329 ++result; 330 bci = code->osr_entry_bci() + 1; 331 } 332 } else { 333 code = mh->code(); 334 } 335 if (code != NULL) { 336 code->mark_for_deoptimization(); 337 ++result; 338 } 339 result += CodeCache::mark_for_deoptimization(mh()); 340 if (result > 0) { 341 VM_Deoptimize op; 342 VMThread::execute(&op); 343 } 344 return result; 345 WB_END 346 347 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 348 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 349 MutexLockerEx mu(Compile_lock); 350 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 351 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 352 if (code == NULL) { 353 return JNI_FALSE; 354 } 355 return (code->is_alive() && !code->is_marked_for_deoptimization()); 356 WB_END 357 358 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 359 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 360 MutexLockerEx mu(Compile_lock); 361 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 362 if (is_osr) { 363 return CompilationPolicy::can_be_osr_compiled(mh, comp_level); 364 } else { 365 return CompilationPolicy::can_be_compiled(mh, comp_level); 366 } 367 WB_END 368 369 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method)) 370 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 371 MutexLockerEx mu(Compile_lock); 372 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 373 return mh->queued_for_compilation(); 374 WB_END 375 376 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 377 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 378 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 379 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 380 return (code != NULL ? code->comp_level() : CompLevel_none); 381 WB_END 382 383 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 384 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 385 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 386 if (is_osr) { 387 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox"); 388 } else { 389 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox"); 390 } 391 WB_END 392 393 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method)) 394 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 395 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 396 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false); 397 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci); 398 WB_END 399 400 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 401 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 402 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 403 bool result = mh->dont_inline(); 404 mh->set_dont_inline(value == JNI_TRUE); 405 return result; 406 WB_END 407 408 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level)) 409 if (comp_level == CompLevel_any) { 410 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ + 411 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */; 412 } else { 413 return CompileBroker::queue_size(comp_level); 414 } 415 WB_END 416 417 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 418 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 419 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 420 bool result = mh->force_inline(); 421 mh->set_force_inline(value == JNI_TRUE); 422 return result; 423 WB_END 424 425 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci)) 426 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 427 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 428 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD); 429 MutexLockerEx mu(Compile_lock); 430 return (mh->queued_for_compilation() || nm != NULL); 431 WB_END 432 433 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method)) 434 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 435 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 436 MutexLockerEx mu(Compile_lock); 437 MethodData* mdo = mh->method_data(); 438 MethodCounters* mcs = mh->method_counters(); 439 440 if (mdo != NULL) { 441 mdo->init(); 442 ResourceMark rm; 443 int arg_count = mdo->method()->size_of_parameters(); 444 for (int i = 0; i < arg_count; i++) { 445 mdo->set_arg_modified(i, 0); 446 } 447 } 448 449 mh->clear_not_c1_compilable(); 450 mh->clear_not_c2_compilable(); 451 mh->clear_not_c2_osr_compilable(); 452 NOT_PRODUCT(mh->set_compiled_invocation_count(0)); 453 if (mcs != NULL) { 454 mcs->backedge_counter()->init(); 455 mcs->invocation_counter()->init(); 456 mcs->set_interpreter_invocation_count(0); 457 mcs->set_interpreter_throwout_count(0); 458 459 #ifdef TIERED 460 mcs->set_rate(0.0F); 461 mh->set_prev_event_count(0, THREAD); 462 mh->set_prev_time(0, THREAD); 463 #endif 464 } 465 WB_END 466 467 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString)) 468 ResourceMark rm(THREAD); 469 int len; 470 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false); 471 return (StringTable::lookup(name, len) != NULL); 472 WB_END 473 474 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o)) 475 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true); 476 Universe::heap()->collect(GCCause::_last_ditch_collection); 477 WB_END 478 479 480 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o)) 481 // static+volatile in order to force the read to happen 482 // (not be eliminated by the compiler) 483 static char c; 484 static volatile char* p; 485 486 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0); 487 if (p == NULL) { 488 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory"); 489 } 490 491 c = *p; 492 WB_END 493 494 WB_ENTRY(jlong, WB_GetThreadFullStackSize(JNIEnv* env, jobject o)) 495 return (jlong) Thread::current()->stack_size(); 496 WB_END 497 498 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o)) 499 JavaThread* t = JavaThread::current(); 500 return (jlong) ( (ptrdiff_t) t->stack_available(os::current_stack_pointer()) - StackShadowPages * os::vm_page_size() ); 501 WB_END 502 503 //Some convenience methods to deal with objects from java 504 int WhiteBox::offset_for_field(const char* field_name, oop object, 505 Symbol* signature_symbol) { 506 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); 507 Thread* THREAD = Thread::current(); 508 509 //Get the class of our object 510 Klass* arg_klass = object->klass(); 511 //Turn it into an instance-klass 512 InstanceKlass* ik = InstanceKlass::cast(arg_klass); 513 514 //Create symbols to look for in the class 515 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), 516 THREAD); 517 518 //To be filled in with an offset of the field we're looking for 519 fieldDescriptor fd; 520 521 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); 522 if (res == NULL) { 523 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), 524 name_symbol->as_C_string()); 525 fatal("Invalid layout of preloaded class"); 526 } 527 528 //fetch the field at the offset we've found 529 int dest_offset = fd.offset(); 530 531 return dest_offset; 532 } 533 534 535 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { 536 int offset = offset_for_field(field_name, object, 537 vmSymbols::string_signature()); 538 oop string = object->obj_field(offset); 539 if (string == NULL) { 540 return NULL; 541 } 542 const char* ret = java_lang_String::as_utf8_string(string); 543 return ret; 544 } 545 546 bool WhiteBox::lookup_bool(const char* field_name, oop object) { 547 int offset = 548 offset_for_field(field_name, object, vmSymbols::bool_signature()); 549 bool ret = (object->bool_field(offset) == JNI_TRUE); 550 return ret; 551 } 552 553 554 #define CC (char*) 555 556 static JNINativeMethod methods[] = { 557 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, 558 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, 559 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, 560 {CC"parseCommandLine", 561 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", 562 (void*) &WB_ParseCommandLine 563 }, 564 {CC"getCompressedOopsMaxHeapSize", CC"()J", 565 (void*)&WB_GetCompressedOopsMaxHeapSize}, 566 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes }, 567 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests}, 568 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea}, 569 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize}, 570 #if INCLUDE_ALL_GCS 571 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, 572 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, 573 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, 574 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, 575 #endif // INCLUDE_ALL_GCS 576 #if INCLUDE_NMT 577 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc }, 578 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree }, 579 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory }, 580 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory }, 581 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory }, 582 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory }, 583 {CC"NMTWaitForDataMerge", CC"()Z", (void*)&WB_NMTWaitForDataMerge}, 584 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported}, 585 #endif // INCLUDE_NMT 586 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll }, 587 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I", 588 (void*)&WB_DeoptimizeMethod }, 589 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z", 590 (void*)&WB_IsMethodCompiled }, 591 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z", 592 (void*)&WB_IsMethodCompilable}, 593 {CC"isMethodQueuedForCompilation", 594 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation}, 595 {CC"makeMethodNotCompilable", 596 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable}, 597 {CC"testSetDontInlineMethod", 598 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod}, 599 {CC"getMethodCompilationLevel", 600 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel}, 601 {CC"getMethodEntryBci", 602 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci}, 603 {CC"getCompileQueueSize", 604 CC"(I)I", (void*)&WB_GetCompileQueueSize}, 605 {CC"testSetForceInlineMethod", 606 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod}, 607 {CC"enqueueMethodForCompilation", 608 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation}, 609 {CC"clearMethodState", 610 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState}, 611 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable }, 612 {CC"fullGC", CC"()V", (void*)&WB_FullGC }, 613 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory }, 614 {CC"getThreadFullStackSize", CC"()J", (void*)&WB_GetThreadFullStackSize }, 615 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize }, 616 }; 617 618 #undef CC 619 620 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) 621 { 622 if (WhiteBoxAPI) { 623 // Make sure that wbclass is loaded by the null classloader 624 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); 625 Handle loader(ikh->class_loader()); 626 if (loader.is_null()) { 627 ResourceMark rm; 628 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 629 bool result = true; 630 // one by one registration natives for exception catching 631 jclass exceptionKlass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string()); 632 for (int i = 0, n = sizeof(methods) / sizeof(methods[0]); i < n; ++i) { 633 if (env->RegisterNatives(wbclass, methods + i, 1) != 0) { 634 result = false; 635 if (env->ExceptionCheck() && env->IsInstanceOf(env->ExceptionOccurred(), exceptionKlass)) { 636 // j.l.NoSuchMethodError is thrown when a method can't be found or a method is not native 637 // ignoring the exception 638 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s", methods[i].name, methods[i].signature); 639 env->ExceptionClear(); 640 } else { 641 // register is failed w/o exception or w/ unexpected exception 642 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); 643 env->UnregisterNatives(wbclass); 644 break; 645 } 646 } 647 } 648 649 if (result) { 650 WhiteBox::set_used(); 651 } 652 } 653 } 654 } 655 JVM_END