1 /* 2 * Copyright (c) 2012, 2015, 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 <new> 28 29 #include "classfile/classLoaderData.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "code/codeCache.hpp" 32 #include "jvmtifiles/jvmtiEnv.hpp" 33 #include "memory/metadataFactory.hpp" 34 #include "memory/universe.hpp" 35 #include "oops/oop.inline.hpp" 36 #include "prims/wbtestmethods/parserTests.hpp" 37 #include "prims/whitebox.hpp" 38 #include "runtime/arguments.hpp" 39 #include "runtime/compilationPolicy.hpp" 40 #include "runtime/deoptimization.hpp" 41 #include "runtime/interfaceSupport.hpp" 42 #include "runtime/os.hpp" 43 #include "runtime/sweeper.hpp" 44 #include "runtime/javaCalls.hpp" 45 #include "runtime/thread.hpp" 46 #include "runtime/vm_version.hpp" 47 #include "utilities/array.hpp" 48 #include "utilities/debug.hpp" 49 #include "utilities/exceptions.hpp" 50 #include "utilities/macros.hpp" 51 #if INCLUDE_ALL_GCS 52 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" 53 #include "gc_implementation/g1/concurrentMark.hpp" 54 #include "gc_implementation/g1/concurrentMarkThread.hpp" 55 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 56 #include "gc_implementation/g1/heapRegionRemSet.hpp" 57 #endif // INCLUDE_ALL_GCS 58 #if INCLUDE_NMT 59 #include "services/mallocSiteTable.hpp" 60 #include "services/memTracker.hpp" 61 #include "utilities/nativeCallStack.hpp" 62 #endif // INCLUDE_NMT 63 64 65 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 66 67 #define SIZE_T_MAX_VALUE ((size_t) -1) 68 69 bool WhiteBox::_used = false; 70 volatile bool WhiteBox::compilation_locked = false; 71 72 class VM_WhiteBoxOperation : public VM_Operation { 73 public: 74 VM_WhiteBoxOperation() { } 75 VMOp_Type type() const { return VMOp_WhiteBoxOperation; } 76 bool allow_nested_vm_operations() const { return true; } 77 }; 78 79 80 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) 81 return (jlong)(void*)JNIHandles::resolve(obj); 82 WB_END 83 84 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) 85 return heapOopSize; 86 WB_END 87 88 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o)) 89 return os::vm_page_size(); 90 WB_END 91 92 class WBIsKlassAliveClosure : public KlassClosure { 93 Symbol* _name; 94 bool _found; 95 public: 96 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} 97 98 void do_klass(Klass* k) { 99 if (_found) return; 100 Symbol* ksym = k->name(); 101 if (ksym->fast_compare(_name) == 0) { 102 _found = true; 103 } 104 } 105 106 bool found() const { 107 return _found; 108 } 109 }; 110 111 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) 112 Handle h_name = JNIHandles::resolve(name); 113 if (h_name.is_null()) return false; 114 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); 115 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return 116 117 WBIsKlassAliveClosure closure(sym); 118 ClassLoaderDataGraph::classes_do(&closure); 119 120 return closure.found(); 121 WB_END 122 123 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) { 124 #if INCLUDE_JVMTI 125 ResourceMark rm; 126 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment)); 127 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION); 128 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg); 129 assert(err == JVMTI_ERROR_NONE, "must not fail"); 130 #endif 131 } 132 WB_END 133 134 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) { 135 #if INCLUDE_JVMTI 136 ResourceMark rm; 137 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment)); 138 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION); 139 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg); 140 assert(err == JVMTI_ERROR_NONE, "must not fail"); 141 #endif 142 } 143 WB_END 144 145 146 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) { 147 return (jlong)Arguments::max_heap_for_compressed_oops(); 148 } 149 WB_END 150 151 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) { 152 CollectorPolicy * p = Universe::heap()->collector_policy(); 153 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap " 154 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT, 155 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(), 156 p->space_alignment(), p->heap_alignment()); 157 } 158 WB_END 159 160 #ifndef PRODUCT 161 // Forward declaration 162 void TestReservedSpace_test(); 163 void TestReserveMemorySpecial_test(); 164 void TestVirtualSpace_test(); 165 void TestMetaspaceAux_test(); 166 #endif 167 168 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o)) 169 #ifndef PRODUCT 170 TestReservedSpace_test(); 171 TestReserveMemorySpecial_test(); 172 TestVirtualSpace_test(); 173 TestMetaspaceAux_test(); 174 #endif 175 WB_END 176 177 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o)) 178 size_t granularity = os::vm_allocation_granularity(); 179 ReservedHeapSpace rhs(100 * granularity, granularity, false); 180 VirtualSpace vs; 181 vs.initialize(rhs, 50 * granularity); 182 183 // Check if constraints are complied 184 if (!( UseCompressedOops && rhs.base() != NULL && 185 Universe::narrow_oop_base() != NULL && 186 Universe::narrow_oop_use_implicit_null_checks() )) { 187 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n " 188 "\tUseCompressedOops is %d\n" 189 "\trhs.base() is "PTR_FORMAT"\n" 190 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n" 191 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d", 192 UseCompressedOops, 193 rhs.base(), 194 Universe::narrow_oop_base(), 195 Universe::narrow_oop_use_implicit_null_checks()); 196 return; 197 } 198 tty->print_cr("Reading from no access area... "); 199 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c", 200 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 )); 201 WB_END 202 203 static jint wb_stress_virtual_space_resize(size_t reserved_space_size, 204 size_t magnitude, size_t iterations) { 205 size_t granularity = os::vm_allocation_granularity(); 206 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false); 207 VirtualSpace vs; 208 if (!vs.initialize(rhs, 0)) { 209 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed."); 210 return 3; 211 } 212 213 long seed = os::random(); 214 tty->print_cr("Random seed is %ld", seed); 215 os::init_random(seed); 216 217 for (size_t i = 0; i < iterations; i++) { 218 219 // Whether we will shrink or grow 220 bool shrink = os::random() % 2L == 0; 221 222 // Get random delta to resize virtual space 223 size_t delta = (size_t)os::random() % magnitude; 224 225 // If we are about to shrink virtual space below zero, then expand instead 226 if (shrink && vs.committed_size() < delta) { 227 shrink = false; 228 } 229 230 // Resizing by delta 231 if (shrink) { 232 vs.shrink_by(delta); 233 } else { 234 // If expanding fails expand_by will silently return false 235 vs.expand_by(delta, true); 236 } 237 } 238 return 0; 239 } 240 241 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o, 242 jlong reserved_space_size, jlong magnitude, jlong iterations)) 243 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", " 244 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude, 245 iterations); 246 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) { 247 tty->print_cr("One of variables printed above is negative. Can't proceed.\n"); 248 return 1; 249 } 250 251 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is 252 // always 8 byte. That's why we should avoid overflow in case of 32bit platform. 253 if (sizeof(size_t) < sizeof(jlong)) { 254 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE; 255 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value 256 || iterations > size_t_max_value) { 257 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n"); 258 return 2; 259 } 260 } 261 262 return wb_stress_virtual_space_resize((size_t) reserved_space_size, 263 (size_t) magnitude, (size_t) iterations); 264 WB_END 265 266 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj)) 267 oop p = JNIHandles::resolve(obj); 268 #if INCLUDE_ALL_GCS 269 if (UseG1GC) { 270 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 271 const HeapRegion* hr = g1->heap_region_containing(p); 272 if (hr == NULL) { 273 return false; 274 } 275 return !(hr->is_young()); 276 } else if (UseParallelGC) { 277 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap(); 278 return !psh->is_in_young(p); 279 } 280 #endif // INCLUDE_ALL_GCS 281 GenCollectedHeap* gch = GenCollectedHeap::heap(); 282 return !gch->is_in_young(p); 283 WB_END 284 285 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj)) 286 oop p = JNIHandles::resolve(obj); 287 return p->size() * HeapWordSize; 288 WB_END 289 290 #if INCLUDE_ALL_GCS 291 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) 292 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 293 oop result = JNIHandles::resolve(obj); 294 const HeapRegion* hr = g1->heap_region_containing(result); 295 return hr->is_humongous(); 296 WB_END 297 298 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o)) 299 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 300 size_t nr = g1->max_regions(); 301 return (jlong)nr; 302 WB_END 303 304 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) 305 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 306 size_t nr = g1->num_free_regions(); 307 return (jlong)nr; 308 WB_END 309 310 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) 311 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 312 return g1->concurrent_mark()->cmThread()->during_cycle(); 313 WB_END 314 315 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o)) 316 G1CollectedHeap* g1h = G1CollectedHeap::heap(); 317 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) { 318 g1h->collect(GCCause::_wb_conc_mark); 319 return true; 320 } 321 return false; 322 WB_END 323 324 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) 325 return (jint)HeapRegion::GrainBytes; 326 WB_END 327 328 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env)) 329 ResourceMark rm(THREAD); 330 G1CollectedHeap* g1h = G1CollectedHeap::heap(); 331 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage(); 332 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 333 return JNIHandles::make_local(env, h()); 334 WB_END 335 #endif // INCLUDE_ALL_GCS 336 337 #if INCLUDE_NMT 338 // Alloc memory using the test memory type so that we can use that to see if 339 // NMT picks it up correctly 340 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size)) 341 jlong addr = 0; 342 addr = (jlong)(uintptr_t)os::malloc(size, mtTest); 343 return addr; 344 WB_END 345 346 // Alloc memory with pseudo call stack. The test can create psudo malloc 347 // allocation site to stress the malloc tracking. 348 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack)) 349 address pc = (address)(size_t)pseudo_stack; 350 NativeCallStack stack(&pc, 1); 351 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack); 352 WB_END 353 354 // Free the memory allocated by NMTAllocTest 355 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem)) 356 os::free((void*)(uintptr_t)mem); 357 WB_END 358 359 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size)) 360 jlong addr = 0; 361 362 addr = (jlong)(uintptr_t)os::reserve_memory(size); 363 MemTracker::record_virtual_memory_type((address)addr, mtTest); 364 365 return addr; 366 WB_END 367 368 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 369 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem); 370 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest); 371 WB_END 372 373 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 374 os::uncommit_memory((char *)(uintptr_t)addr, size); 375 WB_END 376 377 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 378 os::release_memory((char *)(uintptr_t)addr, size); 379 WB_END 380 381 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env)) 382 // Test that we can downgrade NMT levels but not upgrade them. 383 if (MemTracker::tracking_level() == NMT_off) { 384 MemTracker::transition_to(NMT_off); 385 return MemTracker::tracking_level() == NMT_off; 386 } else { 387 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking"); 388 MemTracker::transition_to(NMT_summary); 389 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now"); 390 391 // Can't go to detail once NMT is set to summary. 392 MemTracker::transition_to(NMT_detail); 393 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now"); 394 395 // Shutdown sets tracking level to minimal. 396 MemTracker::shutdown(); 397 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now"); 398 399 // Once the tracking level is minimal, we cannot increase to summary. 400 // The code ignores this request instead of asserting because if the malloc site 401 // table overflows in another thread, it tries to change the code to summary. 402 MemTracker::transition_to(NMT_summary); 403 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now"); 404 405 // Really can never go up to detail, verify that the code would never do this. 406 MemTracker::transition_to(NMT_detail); 407 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now"); 408 return MemTracker::tracking_level() == NMT_minimal; 409 } 410 WB_END 411 412 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o)) 413 int hash_size = MallocSiteTable::hash_buckets(); 414 assert(hash_size > 0, "NMT hash_size should be > 0"); 415 return (jint)hash_size; 416 WB_END 417 #endif // INCLUDE_NMT 418 419 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) { 420 assert(method != NULL, "method should not be null"); 421 ThreadToNativeFromVM ttn(thread); 422 return env->FromReflectedMethod(method); 423 } 424 425 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested 426 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation { 427 private: 428 int _result; 429 const bool _make_not_entrant; 430 public: 431 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) : 432 _result(0), _make_not_entrant(make_not_entrant) { } 433 int result() const { return _result; } 434 435 void doit() { 436 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) { 437 if (t->has_last_Java_frame()) { 438 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) { 439 frame* f = fst.current(); 440 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) { 441 RegisterMap* reg_map = fst.register_map(); 442 Deoptimization::deoptimize(t, *f, reg_map); 443 if (_make_not_entrant) { 444 nmethod* nm = CodeCache::find_nmethod(f->pc()); 445 assert(nm != NULL, "sanity check"); 446 nm->make_not_entrant(); 447 } 448 ++_result; 449 } 450 } 451 } 452 } 453 } 454 }; 455 456 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant)) 457 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE); 458 VMThread::execute(&op); 459 return op.result(); 460 WB_END 461 462 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o)) 463 MutexLockerEx mu(Compile_lock); 464 CodeCache::mark_all_nmethods_for_deoptimization(); 465 VM_Deoptimize op; 466 VMThread::execute(&op); 467 WB_END 468 469 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 470 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 471 int result = 0; 472 CHECK_JNI_EXCEPTION_(env, result); 473 MutexLockerEx mu(Compile_lock); 474 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 475 if (is_osr) { 476 result += mh->mark_osr_nmethods(); 477 } else if (mh->code() != NULL) { 478 mh->code()->mark_for_deoptimization(); 479 ++result; 480 } 481 result += CodeCache::mark_for_deoptimization(mh()); 482 if (result > 0) { 483 VM_Deoptimize op; 484 VMThread::execute(&op); 485 } 486 return result; 487 WB_END 488 489 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 490 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 491 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 492 MutexLockerEx mu(Compile_lock); 493 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 494 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 495 if (code == NULL) { 496 return JNI_FALSE; 497 } 498 return (code->is_alive() && !code->is_marked_for_deoptimization()); 499 WB_END 500 501 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 502 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 503 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 504 MutexLockerEx mu(Compile_lock); 505 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 506 if (is_osr) { 507 return CompilationPolicy::can_be_osr_compiled(mh, comp_level); 508 } else { 509 return CompilationPolicy::can_be_compiled(mh, comp_level); 510 } 511 WB_END 512 513 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method)) 514 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 515 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 516 MutexLockerEx mu(Compile_lock); 517 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 518 return mh->queued_for_compilation(); 519 WB_END 520 521 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 522 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 523 CHECK_JNI_EXCEPTION_(env, CompLevel_none); 524 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 525 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 526 return (code != NULL ? code->comp_level() : CompLevel_none); 527 WB_END 528 529 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 530 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 531 CHECK_JNI_EXCEPTION(env); 532 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 533 if (is_osr) { 534 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox"); 535 } else { 536 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox"); 537 } 538 WB_END 539 540 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method)) 541 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 542 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci); 543 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 544 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false); 545 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci); 546 WB_END 547 548 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 549 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 550 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 551 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 552 bool result = mh->dont_inline(); 553 mh->set_dont_inline(value == JNI_TRUE); 554 return result; 555 WB_END 556 557 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level)) 558 if (comp_level == CompLevel_any) { 559 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ + 560 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */; 561 } else { 562 return CompileBroker::queue_size(comp_level); 563 } 564 WB_END 565 566 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 567 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 568 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 569 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 570 bool result = mh->force_inline(); 571 mh->set_force_inline(value == JNI_TRUE); 572 return result; 573 WB_END 574 575 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci)) 576 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 577 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 578 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 579 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD); 580 MutexLockerEx mu(Compile_lock); 581 return (mh->queued_for_compilation() || nm != NULL); 582 WB_END 583 584 class AlwaysFalseClosure : public BoolObjectClosure { 585 public: 586 bool do_object_b(oop p) { return false; } 587 }; 588 589 static AlwaysFalseClosure always_false; 590 591 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method)) 592 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 593 CHECK_JNI_EXCEPTION(env); 594 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 595 MutexLockerEx mu(Compile_lock); 596 MethodData* mdo = mh->method_data(); 597 MethodCounters* mcs = mh->method_counters(); 598 599 if (mdo != NULL) { 600 mdo->init(); 601 ResourceMark rm; 602 int arg_count = mdo->method()->size_of_parameters(); 603 for (int i = 0; i < arg_count; i++) { 604 mdo->set_arg_modified(i, 0); 605 } 606 MutexLockerEx mu(mdo->extra_data_lock()); 607 mdo->clean_method_data(&always_false); 608 } 609 610 mh->clear_not_c1_compilable(); 611 mh->clear_not_c2_compilable(); 612 mh->clear_not_c2_osr_compilable(); 613 NOT_PRODUCT(mh->set_compiled_invocation_count(0)); 614 if (mcs != NULL) { 615 mcs->backedge_counter()->init(); 616 mcs->invocation_counter()->init(); 617 mcs->set_interpreter_invocation_count(0); 618 mcs->set_interpreter_throwout_count(0); 619 620 #ifdef TIERED 621 mcs->set_rate(0.0F); 622 mh->set_prev_event_count(0); 623 mh->set_prev_time(0); 624 #endif 625 } 626 WB_END 627 628 template <typename T> 629 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) { 630 if (name == NULL) { 631 return false; 632 } 633 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 634 const char* flag_name = env->GetStringUTFChars(name, NULL); 635 bool result = (*TAt)(flag_name, value, true, true); 636 env->ReleaseStringUTFChars(name, flag_name); 637 return result; 638 } 639 640 template <typename T> 641 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) { 642 if (name == NULL) { 643 return false; 644 } 645 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 646 const char* flag_name = env->GetStringUTFChars(name, NULL); 647 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL); 648 env->ReleaseStringUTFChars(name, flag_name); 649 return result; 650 } 651 652 template <typename T> 653 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) { 654 ResourceMark rm(thread); 655 jclass clazz = env->FindClass(name->as_C_string()); 656 CHECK_JNI_EXCEPTION_(env, NULL); 657 jmethodID methodID = env->GetStaticMethodID(clazz, 658 vmSymbols::valueOf_name()->as_C_string(), 659 sig->as_C_string()); 660 CHECK_JNI_EXCEPTION_(env, NULL); 661 jobject result = env->CallStaticObjectMethod(clazz, methodID, value); 662 CHECK_JNI_EXCEPTION_(env, NULL); 663 return result; 664 } 665 666 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) { 667 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value); 668 } 669 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) { 670 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value); 671 } 672 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) { 673 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value); 674 } 675 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) { 676 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value); 677 }*/ 678 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) { 679 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value); 680 } 681 682 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) { 683 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 684 const char* flag_name = env->GetStringUTFChars(name, NULL); 685 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true); 686 env->ReleaseStringUTFChars(name, flag_name); 687 return result; 688 } 689 690 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name)) 691 Flag* flag = getVMFlag(thread, env, name); 692 return (flag != NULL) && flag->is_constant_in_binary(); 693 WB_END 694 695 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name)) 696 Flag* flag = getVMFlag(thread, env, name); 697 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker()); 698 WB_END 699 700 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name)) 701 bool result; 702 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) { 703 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 704 return booleanBox(thread, env, result); 705 } 706 return NULL; 707 WB_END 708 709 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name)) 710 intx result; 711 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) { 712 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 713 return longBox(thread, env, result); 714 } 715 return NULL; 716 WB_END 717 718 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name)) 719 uintx result; 720 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) { 721 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 722 return longBox(thread, env, result); 723 } 724 return NULL; 725 WB_END 726 727 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name)) 728 uint64_t result; 729 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) { 730 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 731 return longBox(thread, env, result); 732 } 733 return NULL; 734 WB_END 735 736 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name)) 737 uintx result; 738 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) { 739 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 740 return longBox(thread, env, result); 741 } 742 return NULL; 743 WB_END 744 745 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name)) 746 double result; 747 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) { 748 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 749 return doubleBox(thread, env, result); 750 } 751 return NULL; 752 WB_END 753 754 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name)) 755 ccstr ccstrResult; 756 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) { 757 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 758 jstring result = env->NewStringUTF(ccstrResult); 759 CHECK_JNI_EXCEPTION_(env, NULL); 760 return result; 761 } 762 return NULL; 763 WB_END 764 765 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value)) 766 bool result = value == JNI_TRUE ? true : false; 767 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut); 768 WB_END 769 770 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 771 intx result = value; 772 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut); 773 WB_END 774 775 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 776 uintx result = value; 777 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut); 778 WB_END 779 780 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 781 uint64_t result = value; 782 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut); 783 WB_END 784 785 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 786 size_t result = value; 787 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut); 788 WB_END 789 790 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value)) 791 double result = value; 792 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut); 793 WB_END 794 795 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value)) 796 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 797 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL); 798 ccstr ccstrResult = ccstrValue; 799 bool needFree; 800 { 801 ThreadInVMfromNative ttvfn(thread); // back to VM 802 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut); 803 } 804 if (value != NULL) { 805 env->ReleaseStringUTFChars(value, ccstrValue); 806 } 807 if (needFree) { 808 FREE_C_HEAP_ARRAY(char, ccstrResult); 809 } 810 WB_END 811 812 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout)) 813 WhiteBox::compilation_locked = true; 814 WB_END 815 816 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o)) 817 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag); 818 WhiteBox::compilation_locked = false; 819 mo.notify_all(); 820 WB_END 821 822 void WhiteBox::sweeper_thread_entry(JavaThread* thread, TRAPS) { 823 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled"); 824 { 825 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 826 NMethodSweeper::_should_sweep = true; 827 } 828 NMethodSweeper::possibly_sweep(); 829 } 830 831 JavaThread* WhiteBox::create_sweeper_thread(TRAPS) { 832 // create sweeper thread w/ custom entry -- one iteration instead of loop 833 CodeCacheSweeperThread* sweeper_thread = new CodeCacheSweeperThread(); 834 sweeper_thread->set_entry_point(&WhiteBox::sweeper_thread_entry); 835 836 // create j.l.Thread object and associate it w/ sweeper thread 837 { 838 // inherit deamon property from current thread 839 bool is_daemon = java_lang_Thread::is_daemon(JavaThread::current()->threadObj()); 840 841 HandleMark hm(THREAD); 842 Handle thread_group(THREAD, Universe::system_thread_group()); 843 const char* name = "WB Sweeper thread"; 844 sweeper_thread->allocate_threadObj(thread_group, name, is_daemon, THREAD); 845 } 846 847 { 848 MutexLocker mu(Threads_lock, THREAD); 849 Threads::add(sweeper_thread); 850 } 851 return sweeper_thread; 852 } 853 854 WB_ENTRY(jobject, WB_ForceNMethodSweep(JNIEnv* env, jobject o)) 855 JavaThread* sweeper_thread = WhiteBox::create_sweeper_thread(Thread::current()); 856 if (sweeper_thread == NULL) { 857 return NULL; 858 } 859 jobject result = JNIHandles::make_local(env, sweeper_thread->threadObj()); 860 Thread::start(sweeper_thread); 861 return result; 862 WB_END 863 864 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString)) 865 ResourceMark rm(THREAD); 866 int len; 867 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false); 868 return (StringTable::lookup(name, len) != NULL); 869 WB_END 870 871 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o)) 872 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true); 873 Universe::heap()->collect(GCCause::_last_ditch_collection); 874 #if INCLUDE_ALL_GCS 875 if (UseG1GC) { 876 // Needs to be cleared explicitly for G1 877 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false); 878 } 879 #endif // INCLUDE_ALL_GCS 880 WB_END 881 882 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o)) 883 Universe::heap()->collect(GCCause::_wb_young_gc); 884 WB_END 885 886 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o)) 887 // static+volatile in order to force the read to happen 888 // (not be eliminated by the compiler) 889 static char c; 890 static volatile char* p; 891 892 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0); 893 if (p == NULL) { 894 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory"); 895 } 896 897 c = *p; 898 WB_END 899 900 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o)) 901 const char* cpu_features = VM_Version::cpu_features(); 902 ThreadToNativeFromVM ttn(thread); 903 jstring features_string = env->NewStringUTF(cpu_features); 904 905 CHECK_JNI_EXCEPTION_(env, NULL); 906 907 return features_string; 908 WB_END 909 910 int WhiteBox::get_blob_type(const CodeBlob* code) { 911 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled"); 912 return CodeCache::get_code_heap(code)->code_blob_type(); 913 } 914 915 CodeHeap* WhiteBox::get_code_heap(int blob_type) { 916 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled"); 917 return CodeCache::get_code_heap(blob_type); 918 } 919 920 struct CodeBlobStub { 921 CodeBlobStub(const CodeBlob* blob) : 922 name(os::strdup(blob->name())), 923 size(blob->size()), 924 blob_type(WhiteBox::get_blob_type(blob)) { } 925 ~CodeBlobStub() { os::free((void*) name); } 926 const char* const name; 927 const int size; 928 const int blob_type; 929 }; 930 931 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) { 932 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 933 CHECK_JNI_EXCEPTION_(env, NULL); 934 jobjectArray result = env->NewObjectArray(3, clazz, NULL); 935 936 jstring name = env->NewStringUTF(cb->name); 937 CHECK_JNI_EXCEPTION_(env, NULL); 938 env->SetObjectArrayElement(result, 0, name); 939 940 jobject obj = integerBox(thread, env, cb->size); 941 CHECK_JNI_EXCEPTION_(env, NULL); 942 env->SetObjectArrayElement(result, 1, obj); 943 944 obj = integerBox(thread, env, cb->blob_type); 945 CHECK_JNI_EXCEPTION_(env, NULL); 946 env->SetObjectArrayElement(result, 2, obj); 947 948 return result; 949 } 950 951 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 952 ResourceMark rm(THREAD); 953 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 954 CHECK_JNI_EXCEPTION_(env, NULL); 955 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 956 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 957 jobjectArray result = NULL; 958 if (code == NULL) { 959 return result; 960 } 961 int insts_size = code->insts_size(); 962 963 ThreadToNativeFromVM ttn(thread); 964 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 965 CHECK_JNI_EXCEPTION_(env, NULL); 966 result = env->NewObjectArray(4, clazz, NULL); 967 if (result == NULL) { 968 return result; 969 } 970 971 CodeBlobStub stub(code); 972 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub); 973 env->SetObjectArrayElement(result, 0, codeBlob); 974 975 jobject level = integerBox(thread, env, code->comp_level()); 976 CHECK_JNI_EXCEPTION_(env, NULL); 977 env->SetObjectArrayElement(result, 1, level); 978 979 jbyteArray insts = env->NewByteArray(insts_size); 980 CHECK_JNI_EXCEPTION_(env, NULL); 981 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin()); 982 env->SetObjectArrayElement(result, 2, insts); 983 984 jobject id = integerBox(thread, env, code->compile_id()); 985 CHECK_JNI_EXCEPTION_(env, NULL); 986 env->SetObjectArrayElement(result, 3, id); 987 988 return result; 989 WB_END 990 991 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) { 992 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled"); 993 BufferBlob* blob; 994 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob)); 995 if (full_size < size) { 996 full_size += round_to(size - full_size, oopSize); 997 } 998 { 999 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1000 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type); 1001 ::new (blob) BufferBlob("WB::DummyBlob", full_size); 1002 } 1003 // Track memory usage statistic after releasing CodeCache_lock 1004 MemoryService::track_code_cache_memory_usage(); 1005 return blob; 1006 } 1007 1008 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type)) 1009 return (jlong) WhiteBox::allocate_code_blob(size, blob_type); 1010 WB_END 1011 1012 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr)) 1013 BufferBlob::free((BufferBlob*) addr); 1014 WB_END 1015 1016 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type)) 1017 ResourceMark rm; 1018 GrowableArray<CodeBlobStub*> blobs; 1019 { 1020 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1021 CodeHeap* heap = WhiteBox::get_code_heap(blob_type); 1022 if (heap == NULL) { 1023 return NULL; 1024 } 1025 for (CodeBlob* cb = (CodeBlob*) heap->first(); 1026 cb != NULL; cb = (CodeBlob*) heap->next(cb)) { 1027 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub); 1028 new (stub) CodeBlobStub(cb); 1029 blobs.append(stub); 1030 } 1031 } 1032 if (blobs.length() == 0) { 1033 return NULL; 1034 } 1035 ThreadToNativeFromVM ttn(thread); 1036 jobjectArray result = NULL; 1037 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 1038 CHECK_JNI_EXCEPTION_(env, NULL); 1039 result = env->NewObjectArray(blobs.length(), clazz, NULL); 1040 if (result == NULL) { 1041 return result; 1042 } 1043 int i = 0; 1044 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin(); 1045 it != blobs.end(); ++it) { 1046 jobjectArray obj = codeBlob2objectArray(thread, env, *it); 1047 env->SetObjectArrayElement(result, i, obj); 1048 ++i; 1049 } 1050 return result; 1051 WB_END 1052 1053 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o)) 1054 return CompileBroker::get_compilation_activity_mode(); 1055 WB_END 1056 1057 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr)) 1058 ThreadToNativeFromVM ttn(thread); 1059 CodeBlobStub stub((CodeBlob*) addr); 1060 return codeBlob2objectArray(thread, env, &stub); 1061 WB_END 1062 1063 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o)) 1064 return (jlong) Thread::current()->stack_size(); 1065 WB_END 1066 1067 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o)) 1068 JavaThread* t = JavaThread::current(); 1069 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size(); 1070 WB_END 1071 1072 int WhiteBox::array_bytes_to_length(size_t bytes) { 1073 return Array<u1>::bytes_to_length(bytes); 1074 } 1075 1076 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size)) 1077 if (size < 0) { 1078 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1079 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size)); 1080 } 1081 1082 oop class_loader_oop = JNIHandles::resolve(class_loader); 1083 ClassLoaderData* cld = class_loader_oop != NULL 1084 ? java_lang_ClassLoader::loader_data(class_loader_oop) 1085 : ClassLoaderData::the_null_class_loader_data(); 1086 1087 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread); 1088 1089 return (jlong)(uintptr_t)metadata; 1090 WB_END 1091 1092 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size)) 1093 oop class_loader_oop = JNIHandles::resolve(class_loader); 1094 ClassLoaderData* cld = class_loader_oop != NULL 1095 ? java_lang_ClassLoader::loader_data(class_loader_oop) 1096 : ClassLoaderData::the_null_class_loader_data(); 1097 1098 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr); 1099 WB_END 1100 1101 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc)) 1102 if (inc < 0) { 1103 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1104 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc)); 1105 } 1106 1107 jlong max_size_t = (jlong) ((size_t) -1); 1108 if (inc > max_size_t) { 1109 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1110 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc)); 1111 } 1112 1113 size_t new_cap_until_GC = 0; 1114 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment()); 1115 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC); 1116 if (!success) { 1117 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), 1118 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC " 1119 "due to contention with another thread"); 1120 } 1121 return (jlong) new_cap_until_GC; 1122 WB_END 1123 1124 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb)) 1125 return (jlong) MetaspaceGC::capacity_until_GC(); 1126 WB_END 1127 1128 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue)) 1129 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ? 1130 Monitor::_safepoint_check_always : 1131 Monitor::_safepoint_check_never; 1132 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required), 1133 attemptedNoSafepointValue == JNI_TRUE); 1134 WB_END 1135 1136 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj)) 1137 oop obj_oop = JNIHandles::resolve(obj); 1138 return (jboolean) obj_oop->mark()->has_monitor(); 1139 WB_END 1140 1141 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb)) 1142 VM_ForceSafepoint force_safepoint_op; 1143 VMThread::execute(&force_safepoint_op); 1144 WB_END 1145 1146 template <typename T> 1147 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) { 1148 assert(value != NULL, "sanity"); 1149 if (method == NULL || name == NULL) { 1150 return false; 1151 } 1152 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 1153 CHECK_JNI_EXCEPTION_(env, false); 1154 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid)); 1155 // can't be in VM when we call JNI 1156 ThreadToNativeFromVM ttnfv(thread); 1157 const char* flag_name = env->GetStringUTFChars(name, NULL); 1158 bool result = CompilerOracle::has_option_value(mh, flag_name, *value); 1159 env->ReleaseStringUTFChars(name, flag_name); 1160 return result; 1161 } 1162 1163 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name)) 1164 bool result; 1165 if (GetMethodOption<bool> (thread, env, method, name, &result)) { 1166 // can't be in VM when we call JNI 1167 ThreadToNativeFromVM ttnfv(thread); 1168 return booleanBox(thread, env, result); 1169 } 1170 return NULL; 1171 WB_END 1172 1173 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name)) 1174 intx result; 1175 if (GetMethodOption <intx> (thread, env, method, name, &result)) { 1176 // can't be in VM when we call JNI 1177 ThreadToNativeFromVM ttnfv(thread); 1178 return longBox(thread, env, result); 1179 } 1180 return NULL; 1181 WB_END 1182 1183 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name)) 1184 uintx result; 1185 if (GetMethodOption <uintx> (thread, env, method, name, &result)) { 1186 // can't be in VM when we call JNI 1187 ThreadToNativeFromVM ttnfv(thread); 1188 return longBox(thread, env, result); 1189 } 1190 return NULL; 1191 WB_END 1192 1193 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name)) 1194 double result; 1195 if (GetMethodOption <double> (thread, env, method, name, &result)) { 1196 // can't be in VM when we call JNI 1197 ThreadToNativeFromVM ttnfv(thread); 1198 return doubleBox(thread, env, result); 1199 } 1200 return NULL; 1201 WB_END 1202 1203 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name)) 1204 ccstr ccstrResult; 1205 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) { 1206 // can't be in VM when we call JNI 1207 ThreadToNativeFromVM ttnfv(thread); 1208 jstring result = env->NewStringUTF(ccstrResult); 1209 CHECK_JNI_EXCEPTION_(env, NULL); 1210 return result; 1211 } 1212 return NULL; 1213 WB_END 1214 1215 //Some convenience methods to deal with objects from java 1216 int WhiteBox::offset_for_field(const char* field_name, oop object, 1217 Symbol* signature_symbol) { 1218 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); 1219 Thread* THREAD = Thread::current(); 1220 1221 //Get the class of our object 1222 Klass* arg_klass = object->klass(); 1223 //Turn it into an instance-klass 1224 InstanceKlass* ik = InstanceKlass::cast(arg_klass); 1225 1226 //Create symbols to look for in the class 1227 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), 1228 THREAD); 1229 1230 //To be filled in with an offset of the field we're looking for 1231 fieldDescriptor fd; 1232 1233 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); 1234 if (res == NULL) { 1235 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), 1236 name_symbol->as_C_string()); 1237 fatal("Invalid layout of preloaded class"); 1238 } 1239 1240 //fetch the field at the offset we've found 1241 int dest_offset = fd.offset(); 1242 1243 return dest_offset; 1244 } 1245 1246 1247 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { 1248 int offset = offset_for_field(field_name, object, 1249 vmSymbols::string_signature()); 1250 oop string = object->obj_field(offset); 1251 if (string == NULL) { 1252 return NULL; 1253 } 1254 const char* ret = java_lang_String::as_utf8_string(string); 1255 return ret; 1256 } 1257 1258 bool WhiteBox::lookup_bool(const char* field_name, oop object) { 1259 int offset = 1260 offset_for_field(field_name, object, vmSymbols::bool_signature()); 1261 bool ret = (object->bool_field(offset) == JNI_TRUE); 1262 return ret; 1263 } 1264 1265 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) { 1266 ResourceMark rm; 1267 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 1268 1269 // one by one registration natives for exception catching 1270 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string()); 1271 CHECK_JNI_EXCEPTION(env); 1272 for (int i = 0, n = method_count; i < n; ++i) { 1273 // Skip dummy entries 1274 if (method_array[i].fnPtr == NULL) continue; 1275 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) { 1276 jthrowable throwable_obj = env->ExceptionOccurred(); 1277 if (throwable_obj != NULL) { 1278 env->ExceptionClear(); 1279 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) { 1280 // NoSuchMethodError is thrown when a method can't be found or a method is not native. 1281 // Ignoring the exception since it is not preventing use of other WhiteBox methods. 1282 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s", 1283 method_array[i].name, method_array[i].signature); 1284 } 1285 } else { 1286 // Registration failed unexpectedly. 1287 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered", 1288 method_array[i].name, method_array[i].signature); 1289 env->UnregisterNatives(wbclass); 1290 break; 1291 } 1292 } 1293 } 1294 } 1295 1296 #define CC (char*) 1297 1298 static JNINativeMethod methods[] = { 1299 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, 1300 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize }, 1301 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen }, 1302 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, 1303 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize }, 1304 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, 1305 {CC"parseCommandLine", 1306 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", 1307 (void*) &WB_ParseCommandLine 1308 }, 1309 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V", 1310 (void*)&WB_AddToBootstrapClassLoaderSearch}, 1311 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V", 1312 (void*)&WB_AddToSystemClassLoaderSearch}, 1313 {CC"getCompressedOopsMaxHeapSize", CC"()J", 1314 (void*)&WB_GetCompressedOopsMaxHeapSize}, 1315 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes }, 1316 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests}, 1317 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea}, 1318 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize}, 1319 #if INCLUDE_ALL_GCS 1320 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, 1321 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, 1322 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions }, 1323 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, 1324 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, 1325 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle }, 1326 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;", 1327 (void*)&WB_G1AuxiliaryMemoryUsage }, 1328 #endif // INCLUDE_ALL_GCS 1329 #if INCLUDE_NMT 1330 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc }, 1331 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack}, 1332 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree }, 1333 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory }, 1334 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory }, 1335 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory }, 1336 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory }, 1337 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel}, 1338 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize }, 1339 #endif // INCLUDE_NMT 1340 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames }, 1341 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll }, 1342 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I", 1343 (void*)&WB_DeoptimizeMethod }, 1344 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z", 1345 (void*)&WB_IsMethodCompiled }, 1346 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z", 1347 (void*)&WB_IsMethodCompilable}, 1348 {CC"isMethodQueuedForCompilation", 1349 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation}, 1350 {CC"makeMethodNotCompilable", 1351 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable}, 1352 {CC"testSetDontInlineMethod", 1353 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod}, 1354 {CC"getMethodCompilationLevel", 1355 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel}, 1356 {CC"getMethodEntryBci", 1357 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci}, 1358 {CC"getCompileQueueSize", 1359 CC"(I)I", (void*)&WB_GetCompileQueueSize}, 1360 {CC"testSetForceInlineMethod", 1361 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod}, 1362 {CC"enqueueMethodForCompilation", 1363 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation}, 1364 {CC"clearMethodState", 1365 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState}, 1366 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation}, 1367 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation}, 1368 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag}, 1369 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag}, 1370 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag}, 1371 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag}, 1372 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag}, 1373 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag}, 1374 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag}, 1375 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag}, 1376 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V", 1377 (void*)&WB_SetStringVMFlag}, 1378 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;", 1379 (void*)&WB_GetBooleanVMFlag}, 1380 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1381 (void*)&WB_GetIntxVMFlag}, 1382 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1383 (void*)&WB_GetUintxVMFlag}, 1384 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1385 (void*)&WB_GetUint64VMFlag}, 1386 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1387 (void*)&WB_GetSizeTVMFlag}, 1388 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;", 1389 (void*)&WB_GetDoubleVMFlag}, 1390 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;", 1391 (void*)&WB_GetStringVMFlag}, 1392 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable }, 1393 {CC"fullGC", CC"()V", (void*)&WB_FullGC }, 1394 {CC"youngGC", CC"()V", (void*)&WB_YoungGC }, 1395 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory }, 1396 {CC"allocateMetaspace", 1397 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace }, 1398 {CC"freeMetaspace", 1399 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace }, 1400 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC }, 1401 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC }, 1402 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures }, 1403 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;", 1404 (void*)&WB_GetNMethod }, 1405 {CC"forceNMethodSweep0", CC"()Ljava/lang/Thread;", (void*)&WB_ForceNMethodSweep }, 1406 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob }, 1407 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob }, 1408 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries }, 1409 {CC"getCompilationActivityMode", 1410 CC"()I", (void*)&WB_GetCompilationActivityMode}, 1411 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob }, 1412 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize }, 1413 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize }, 1414 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls }, 1415 {CC"isMonitorInflated", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated }, 1416 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint }, 1417 {CC"getMethodBooleanOption", 1418 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;", 1419 (void*)&WB_GetMethodBooleaneOption}, 1420 {CC"getMethodIntxOption", 1421 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;", 1422 (void*)&WB_GetMethodIntxOption}, 1423 {CC"getMethodUintxOption", 1424 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;", 1425 (void*)&WB_GetMethodUintxOption}, 1426 {CC"getMethodDoubleOption", 1427 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;", 1428 (void*)&WB_GetMethodDoubleOption}, 1429 {CC"getMethodStringOption", 1430 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;", 1431 (void*)&WB_GetMethodStringOption}, 1432 }; 1433 1434 #undef CC 1435 1436 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) 1437 { 1438 if (WhiteBoxAPI) { 1439 // Make sure that wbclass is loaded by the null classloader 1440 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); 1441 Handle loader(ikh->class_loader()); 1442 if (loader.is_null()) { 1443 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0])); 1444 WhiteBox::register_extended(env, wbclass, thread); 1445 WhiteBox::set_used(); 1446 } 1447 } 1448 } 1449 JVM_END