1 /*
   2  * Copyright (c) 2012, 2014, 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 "code/codeCache.hpp"
  28 #include "memory/metadataFactory.hpp"
  29 #include "memory/universe.hpp"
  30 #include "oops/oop.inline.hpp"
  31 
  32 #include "classfile/stringTable.hpp"
  33 #include "classfile/classLoaderData.hpp"
  34 
  35 #include "prims/whitebox.hpp"
  36 #include "prims/wbtestmethods/parserTests.hpp"
  37 
  38 #include "runtime/thread.hpp"
  39 #include "runtime/arguments.hpp"
  40 #include "runtime/interfaceSupport.hpp"
  41 #include "runtime/os.hpp"
  42 #include "runtime/vm_version.hpp"
  43 
  44 #include "utilities/array.hpp"
  45 #include "utilities/debug.hpp"
  46 #include "utilities/macros.hpp"
  47 #include "utilities/exceptions.hpp"
  48 
  49 #if INCLUDE_ALL_GCS
  50 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
  51 #include "gc_implementation/g1/concurrentMark.hpp"
  52 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
  53 #include "gc_implementation/g1/heapRegionRemSet.hpp"
  54 #endif // INCLUDE_ALL_GCS
  55 
  56 #if INCLUDE_NMT
  57 #include "services/mallocSiteTable.hpp"
  58 #include "services/memTracker.hpp"
  59 #include "utilities/nativeCallStack.hpp"
  60 #endif // INCLUDE_NMT
  61 
  62 #include "compiler/compileBroker.hpp"
  63 #include "runtime/compilationPolicy.hpp"
  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 
  71 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  72   return (jlong)(void*)JNIHandles::resolve(obj);
  73 WB_END
  74 
  75 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  76   return heapOopSize;
  77 WB_END
  78 
  79 
  80 class WBIsKlassAliveClosure : public KlassClosure {
  81     Symbol* _name;
  82     bool _found;
  83 public:
  84     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
  85 
  86     void do_klass(Klass* k) {
  87       if (_found) return;
  88       Symbol* ksym = k->name();
  89       if (ksym->fast_compare(_name) == 0) {
  90         _found = true;
  91       }
  92     }
  93 
  94     bool found() const {
  95         return _found;
  96     }
  97 };
  98 
  99 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
 100   Handle h_name = JNIHandles::resolve(name);
 101   if (h_name.is_null()) return false;
 102   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
 103   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 104 
 105   WBIsKlassAliveClosure closure(sym);
 106   ClassLoaderDataGraph::classes_do(&closure);
 107 
 108   return closure.found();
 109 WB_END
 110 
 111 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 112   return (jlong)Arguments::max_heap_for_compressed_oops();
 113 }
 114 WB_END
 115 
 116 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 117   CollectorPolicy * p = Universe::heap()->collector_policy();
 118   gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
 119     SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
 120     p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
 121     p->space_alignment(), p->heap_alignment());
 122 }
 123 WB_END
 124 
 125 #ifndef PRODUCT
 126 // Forward declaration
 127 void TestReservedSpace_test();
 128 void TestReserveMemorySpecial_test();
 129 void TestVirtualSpace_test();
 130 void TestMetaspaceAux_test();
 131 #endif
 132 
 133 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 134 #ifndef PRODUCT
 135   TestReservedSpace_test();
 136   TestReserveMemorySpecial_test();
 137   TestVirtualSpace_test();
 138   TestMetaspaceAux_test();
 139 #endif
 140 WB_END
 141 
 142 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 143   size_t granularity = os::vm_allocation_granularity();
 144   ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
 145   VirtualSpace vs;
 146   vs.initialize(rhs, 50 * granularity);
 147 
 148   //Check if constraints are complied
 149   if (!( UseCompressedOops && rhs.base() != NULL &&
 150          Universe::narrow_oop_base() != NULL &&
 151          Universe::narrow_oop_use_implicit_null_checks() )) {
 152     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 153                   "\tUseCompressedOops is %d\n"
 154                   "\trhs.base() is "PTR_FORMAT"\n"
 155                   "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
 156                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
 157                   UseCompressedOops,
 158                   rhs.base(),
 159                   Universe::narrow_oop_base(),
 160                   Universe::narrow_oop_use_implicit_null_checks());
 161     return;
 162   }
 163   tty->print_cr("Reading from no access area... ");
 164   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 165                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 166 WB_END
 167 
 168 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 169                                            size_t magnitude, size_t iterations) {
 170   size_t granularity = os::vm_allocation_granularity();
 171   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
 172   VirtualSpace vs;
 173   if (!vs.initialize(rhs, 0)) {
 174     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 175     return 3;
 176   }
 177 
 178   long seed = os::random();
 179   tty->print_cr("Random seed is %ld", seed);
 180   os::init_random(seed);
 181 
 182   for (size_t i = 0; i < iterations; i++) {
 183 
 184     // Whether we will shrink or grow
 185     bool shrink = os::random() % 2L == 0;
 186 
 187     // Get random delta to resize virtual space
 188     size_t delta = (size_t)os::random() % magnitude;
 189 
 190     // If we are about to shrink virtual space below zero, then expand instead
 191     if (shrink && vs.committed_size() < delta) {
 192       shrink = false;
 193     }
 194 
 195     // Resizing by delta
 196     if (shrink) {
 197       vs.shrink_by(delta);
 198     } else {
 199       // If expanding fails expand_by will silently return false
 200       vs.expand_by(delta, true);
 201     }
 202   }
 203   return 0;
 204 }
 205 
 206 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 207         jlong reserved_space_size, jlong magnitude, jlong iterations))
 208   tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
 209                 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
 210                 iterations);
 211   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 212     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 213     return 1;
 214   }
 215 
 216   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 217   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 218   if (sizeof(size_t) < sizeof(jlong)) {
 219     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 220     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 221         || iterations > size_t_max_value) {
 222       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 223       return 2;
 224     }
 225   }
 226 
 227   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 228                                         (size_t) magnitude, (size_t) iterations);
 229 WB_END
 230 
 231 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 232   oop p = JNIHandles::resolve(obj);
 233 #if INCLUDE_ALL_GCS
 234   if (UseG1GC) {
 235     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 236     const HeapRegion* hr = g1->heap_region_containing(p);
 237     if (hr == NULL) {
 238       return false;
 239     }
 240     return !(hr->is_young());
 241   } else if (UseParallelGC) {
 242     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 243     return !psh->is_in_young(p);
 244   }
 245 #endif // INCLUDE_ALL_GCS
 246   GenCollectedHeap* gch = GenCollectedHeap::heap();
 247   return !gch->is_in_young(p);
 248 WB_END
 249 
 250 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 251   oop p = JNIHandles::resolve(obj);
 252   return p->size() * HeapWordSize;
 253 WB_END
 254 
 255 #if INCLUDE_ALL_GCS
 256 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 257   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 258   oop result = JNIHandles::resolve(obj);
 259   const HeapRegion* hr = g1->heap_region_containing(result);
 260   return hr->is_humongous();
 261 WB_END
 262 
 263 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 264   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 265   size_t nr = g1->num_free_regions();
 266   return (jlong)nr;
 267 WB_END
 268 
 269 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 270   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 271   ConcurrentMark* cm = g1->concurrent_mark();
 272   return cm->concurrent_marking_in_progress();
 273 WB_END
 274 
 275 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 276   return (jint)HeapRegion::GrainBytes;
 277 WB_END
 278 #endif // INCLUDE_ALL_GCS
 279 
 280 #if INCLUDE_NMT
 281 // Alloc memory using the test memory type so that we can use that to see if
 282 // NMT picks it up correctly
 283 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 284   jlong addr = 0;
 285     addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 286   return addr;
 287 WB_END
 288 
 289 // Alloc memory with pseudo call stack. The test can create psudo malloc
 290 // allocation site to stress the malloc tracking.
 291 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 292   address pc = (address)(size_t)pseudo_stack;
 293   NativeCallStack stack(&pc, 1);
 294   return (jlong)os::malloc(size, mtTest, stack);
 295 WB_END
 296 
 297 // Free the memory allocated by NMTAllocTest
 298 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 299   os::free((void*)(uintptr_t)mem, mtTest);
 300 WB_END
 301 
 302 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 303   jlong addr = 0;
 304 
 305     addr = (jlong)(uintptr_t)os::reserve_memory(size);
 306     MemTracker::record_virtual_memory_type((address)addr, mtTest);
 307 
 308   return addr;
 309 WB_END
 310 
 311 
 312 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 313   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 314   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 315 WB_END
 316 
 317 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 318   os::uncommit_memory((char *)(uintptr_t)addr, size);
 319 WB_END
 320 
 321 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 322   os::release_memory((char *)(uintptr_t)addr, size);
 323 WB_END
 324 
 325 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
 326   return MemTracker::tracking_level() == NMT_detail;
 327 WB_END
 328 
 329 WB_ENTRY(void, WB_NMTOverflowHashBucket(JNIEnv* env, jobject o, jlong num))
 330   address pc = (address)1;
 331   for (jlong index = 0; index < num; index ++) {
 332     NativeCallStack stack(&pc, 1);
 333     os::malloc(0, mtTest, stack);
 334     pc += MallocSiteTable::hash_buckets();
 335   }
 336 WB_END
 337 
 338 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 339   // Test that we can downgrade NMT levels but not upgrade them.
 340   if (MemTracker::tracking_level() == NMT_off) {
 341     MemTracker::transition_to(NMT_off);
 342     return MemTracker::tracking_level() == NMT_off;
 343   } else {
 344     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 345     MemTracker::transition_to(NMT_summary);
 346     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 347 
 348     // Can't go to detail once NMT is set to summary.
 349     MemTracker::transition_to(NMT_detail);
 350     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 351 
 352     // Shutdown sets tracking level to minimal.
 353     MemTracker::shutdown();
 354     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 355 
 356     // Once the tracking level is minimal, we cannot increase to summary.
 357     // The code ignores this request instead of asserting because if the malloc site
 358     // table overflows in another thread, it tries to change the code to summary.
 359     MemTracker::transition_to(NMT_summary);
 360     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 361 
 362     // Really can never go up to detail, verify that the code would never do this.
 363     MemTracker::transition_to(NMT_detail);
 364     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 365     return MemTracker::tracking_level() == NMT_minimal;
 366   }
 367 WB_END
 368 #endif // INCLUDE_NMT
 369 
 370 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 371   assert(method != NULL, "method should not be null");
 372   ThreadToNativeFromVM ttn(thread);
 373   return env->FromReflectedMethod(method);
 374 }
 375 
 376 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 377   MutexLockerEx mu(Compile_lock);
 378   CodeCache::mark_all_nmethods_for_deoptimization();
 379   VM_Deoptimize op;
 380   VMThread::execute(&op);
 381 WB_END
 382 
 383 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 384   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 385   int result = 0;
 386   CHECK_JNI_EXCEPTION_(env, result);
 387   MutexLockerEx mu(Compile_lock);
 388   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 389   nmethod* code;
 390   if (is_osr) {
 391     int bci = InvocationEntryBci;
 392     while ((code = mh->lookup_osr_nmethod_for(bci, CompLevel_none, false)) != NULL) {
 393       code->mark_for_deoptimization();
 394       ++result;
 395       bci = code->osr_entry_bci() + 1;
 396     }
 397   } else {
 398     code = mh->code();
 399   }
 400   if (code != NULL) {
 401     code->mark_for_deoptimization();
 402     ++result;
 403   }
 404   result += CodeCache::mark_for_deoptimization(mh());
 405   if (result > 0) {
 406     VM_Deoptimize op;
 407     VMThread::execute(&op);
 408   }
 409   return result;
 410 WB_END
 411 
 412 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 413   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 414   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 415   MutexLockerEx mu(Compile_lock);
 416   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 417   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 418   if (code == NULL) {
 419     return JNI_FALSE;
 420   }
 421   return (code->is_alive() && !code->is_marked_for_deoptimization());
 422 WB_END
 423 
 424 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 425   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 426   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 427   MutexLockerEx mu(Compile_lock);
 428   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 429   if (is_osr) {
 430     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 431   } else {
 432     return CompilationPolicy::can_be_compiled(mh, comp_level);
 433   }
 434 WB_END
 435 
 436 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 437   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 438   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 439   MutexLockerEx mu(Compile_lock);
 440   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 441   return mh->queued_for_compilation();
 442 WB_END
 443 
 444 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 445   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 446   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 447   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 448   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 449   return (code != NULL ? code->comp_level() : CompLevel_none);
 450 WB_END
 451 
 452 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 453   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 454   CHECK_JNI_EXCEPTION(env);
 455   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 456   if (is_osr) {
 457     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 458   } else {
 459     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 460   }
 461 WB_END
 462 
 463 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 464   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 465   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 466   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 467   nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 468   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 469 WB_END
 470 
 471 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 472   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 473   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 474   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 475   bool result = mh->dont_inline();
 476   mh->set_dont_inline(value == JNI_TRUE);
 477   return result;
 478 WB_END
 479 
 480 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 481   if (comp_level == CompLevel_any) {
 482     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 483         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 484   } else {
 485     return CompileBroker::queue_size(comp_level);
 486   }
 487 WB_END
 488 
 489 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 490   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 491   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 492   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 493   bool result = mh->force_inline();
 494   mh->set_force_inline(value == JNI_TRUE);
 495   return result;
 496 WB_END
 497 
 498 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
 499   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 500   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 501   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 502   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
 503   MutexLockerEx mu(Compile_lock);
 504   return (mh->queued_for_compilation() || nm != NULL);
 505 WB_END
 506 
 507 class VM_WhiteBoxOperation : public VM_Operation {
 508  public:
 509   VM_WhiteBoxOperation()                         { }
 510   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
 511   bool allow_nested_vm_operations() const        { return true; }
 512 };
 513 
 514 class AlwaysFalseClosure : public BoolObjectClosure {
 515  public:
 516   bool do_object_b(oop p) { return false; }
 517 };
 518 
 519 static AlwaysFalseClosure always_false;
 520 
 521 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation {
 522  public:
 523   VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { }
 524   void doit() {
 525     _mdo->clean_method_data(&always_false);
 526   }
 527  private:
 528   MethodData* _mdo;
 529 };
 530 
 531 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
 532   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 533   CHECK_JNI_EXCEPTION(env);
 534   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 535   MutexLockerEx mu(Compile_lock);
 536   MethodData* mdo = mh->method_data();
 537   MethodCounters* mcs = mh->method_counters();
 538 
 539   if (mdo != NULL) {
 540     mdo->init();
 541     ResourceMark rm;
 542     int arg_count = mdo->method()->size_of_parameters();
 543     for (int i = 0; i < arg_count; i++) {
 544       mdo->set_arg_modified(i, 0);
 545     }
 546     VM_WhiteBoxCleanMethodData op(mdo);
 547     VMThread::execute(&op);
 548   }
 549 
 550   mh->clear_not_c1_compilable();
 551   mh->clear_not_c2_compilable();
 552   mh->clear_not_c2_osr_compilable();
 553   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
 554   if (mcs != NULL) {
 555     mcs->backedge_counter()->init();
 556     mcs->invocation_counter()->init();
 557     mcs->set_interpreter_invocation_count(0);
 558     mcs->set_interpreter_throwout_count(0);
 559 
 560 #ifdef TIERED
 561     mcs->set_rate(0.0F);
 562     mh->set_prev_event_count(0);
 563     mh->set_prev_time(0);
 564 #endif
 565   }
 566 WB_END
 567 
 568 template <typename T>
 569 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
 570   if (name == NULL) {
 571     return false;
 572   }
 573   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 574   const char* flag_name = env->GetStringUTFChars(name, NULL);
 575   bool result = (*TAt)(flag_name, value, true, true);
 576   env->ReleaseStringUTFChars(name, flag_name);
 577   return result;
 578 }
 579 
 580 template <typename T>
 581 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
 582   if (name == NULL) {
 583     return false;
 584   }
 585   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 586   const char* flag_name = env->GetStringUTFChars(name, NULL);
 587   bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
 588   env->ReleaseStringUTFChars(name, flag_name);
 589   return result;
 590 }
 591 
 592 template <typename T>
 593 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
 594   ResourceMark rm(thread);
 595   jclass clazz = env->FindClass(name->as_C_string());
 596   CHECK_JNI_EXCEPTION_(env, NULL);
 597   jmethodID methodID = env->GetStaticMethodID(clazz,
 598         vmSymbols::valueOf_name()->as_C_string(),
 599         sig->as_C_string());
 600   CHECK_JNI_EXCEPTION_(env, NULL);
 601   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
 602   CHECK_JNI_EXCEPTION_(env, NULL);
 603   return result;
 604 }
 605 
 606 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
 607   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
 608 }
 609 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
 610   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
 611 }
 612 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
 613   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
 614 }
 615 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
 616   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
 617 }*/
 618 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
 619   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
 620 }
 621 
 622 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
 623   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 624   const char* flag_name = env->GetStringUTFChars(name, NULL);
 625   Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
 626   env->ReleaseStringUTFChars(name, flag_name);
 627   return result;
 628 }
 629 
 630 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
 631   Flag* flag = getVMFlag(thread, env, name);
 632   return (flag != NULL) && flag->is_constant_in_binary();
 633 WB_END
 634 
 635 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
 636   Flag* flag = getVMFlag(thread, env, name);
 637   return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
 638 WB_END
 639 
 640 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
 641   bool result;
 642   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
 643     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 644     return booleanBox(thread, env, result);
 645   }
 646   return NULL;
 647 WB_END
 648 
 649 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
 650   intx result;
 651   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
 652     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 653     return longBox(thread, env, result);
 654   }
 655   return NULL;
 656 WB_END
 657 
 658 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
 659   uintx result;
 660   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
 661     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 662     return longBox(thread, env, result);
 663   }
 664   return NULL;
 665 WB_END
 666 
 667 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
 668   uint64_t result;
 669   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
 670     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 671     return longBox(thread, env, result);
 672   }
 673   return NULL;
 674 WB_END
 675 
 676 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
 677   uintx result;
 678   if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
 679     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 680     return longBox(thread, env, result);
 681   }
 682   return NULL;
 683 WB_END
 684 
 685 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
 686   double result;
 687   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
 688     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 689     return doubleBox(thread, env, result);
 690   }
 691   return NULL;
 692 WB_END
 693 
 694 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
 695   ccstr ccstrResult;
 696   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
 697     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 698     jstring result = env->NewStringUTF(ccstrResult);
 699     CHECK_JNI_EXCEPTION_(env, NULL);
 700     return result;
 701   }
 702   return NULL;
 703 WB_END
 704 
 705 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
 706   bool result = value == JNI_TRUE ? true : false;
 707   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
 708 WB_END
 709 
 710 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 711   intx result = value;
 712   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
 713 WB_END
 714 
 715 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 716   uintx result = value;
 717   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
 718 WB_END
 719 
 720 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 721   uint64_t result = value;
 722   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
 723 WB_END
 724 
 725 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 726   size_t result = value;
 727   SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
 728 WB_END
 729 
 730 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
 731   double result = value;
 732   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
 733 WB_END
 734 
 735 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
 736   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 737   const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
 738   ccstr ccstrResult = ccstrValue;
 739   bool needFree;
 740   {
 741     ThreadInVMfromNative ttvfn(thread); // back to VM
 742     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
 743   }
 744   if (value != NULL) {
 745     env->ReleaseStringUTFChars(value, ccstrValue);
 746   }
 747   if (needFree) {
 748     FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
 749   }
 750 WB_END
 751 
 752 
 753 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
 754   ResourceMark rm(THREAD);
 755   int len;
 756   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
 757   return (StringTable::lookup(name, len) != NULL);
 758 WB_END
 759 
 760 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
 761   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
 762   Universe::heap()->collect(GCCause::_last_ditch_collection);
 763 #if INCLUDE_ALL_GCS
 764   if (UseG1GC) {
 765     // Needs to be cleared explicitly for G1
 766     Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
 767   }
 768 #endif // INCLUDE_ALL_GCS
 769 WB_END
 770 
 771 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
 772   Universe::heap()->collect(GCCause::_wb_young_gc);
 773 WB_END
 774 
 775 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
 776   // static+volatile in order to force the read to happen
 777   // (not be eliminated by the compiler)
 778   static char c;
 779   static volatile char* p;
 780 
 781   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
 782   if (p == NULL) {
 783     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
 784   }
 785 
 786   c = *p;
 787 WB_END
 788 
 789 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
 790   const char* cpu_features = VM_Version::cpu_features();
 791   ThreadToNativeFromVM ttn(thread);
 792   jstring features_string = env->NewStringUTF(cpu_features);
 793 
 794   CHECK_JNI_EXCEPTION_(env, NULL);
 795 
 796   return features_string;
 797 WB_END
 798 
 799 
 800 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 801   ResourceMark rm(THREAD);
 802   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 803   CHECK_JNI_EXCEPTION_(env, NULL);
 804   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 805   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 806   jobjectArray result = NULL;
 807   if (code == NULL) {
 808     return result;
 809   }
 810   int insts_size = code->insts_size();
 811 
 812   ThreadToNativeFromVM ttn(thread);
 813   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
 814   CHECK_JNI_EXCEPTION_(env, NULL);
 815   result = env->NewObjectArray(3, clazz, NULL);
 816   if (result == NULL) {
 817     return result;
 818   }
 819 
 820   jobject level = integerBox(thread, env, code->comp_level());
 821   CHECK_JNI_EXCEPTION_(env, NULL);
 822   env->SetObjectArrayElement(result, 0, level);
 823 
 824   jbyteArray insts = env->NewByteArray(insts_size);
 825   CHECK_JNI_EXCEPTION_(env, NULL);
 826   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
 827   env->SetObjectArrayElement(result, 1, insts);
 828 
 829   jobject id = integerBox(thread, env, code->compile_id());
 830   CHECK_JNI_EXCEPTION_(env, NULL);
 831   env->SetObjectArrayElement(result, 2, id);
 832 
 833   return result;
 834 WB_END
 835 
 836 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
 837   return (jlong) Thread::current()->stack_size();
 838 WB_END
 839 
 840 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
 841   JavaThread* t = JavaThread::current();
 842   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
 843 WB_END
 844 
 845 int WhiteBox::array_bytes_to_length(size_t bytes) {
 846   return Array<u1>::bytes_to_length(bytes);
 847 }
 848 
 849 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
 850   if (size < 0) {
 851     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 852         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
 853   }
 854 
 855   oop class_loader_oop = JNIHandles::resolve(class_loader);
 856   ClassLoaderData* cld = class_loader_oop != NULL
 857       ? java_lang_ClassLoader::loader_data(class_loader_oop)
 858       : ClassLoaderData::the_null_class_loader_data();
 859 
 860   void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
 861 
 862   return (jlong)(uintptr_t)metadata;
 863 WB_END
 864 
 865 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
 866   oop class_loader_oop = JNIHandles::resolve(class_loader);
 867   ClassLoaderData* cld = class_loader_oop != NULL
 868       ? java_lang_ClassLoader::loader_data(class_loader_oop)
 869       : ClassLoaderData::the_null_class_loader_data();
 870 
 871   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
 872 WB_END
 873 
 874 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
 875   if (inc < 0) {
 876     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 877         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
 878   }
 879 
 880   jlong max_size_t = (jlong) ((size_t) -1);
 881   if (inc > max_size_t) {
 882     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 883         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
 884   }
 885 
 886   size_t new_cap_until_GC = 0;
 887   size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
 888   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
 889   if (!success) {
 890     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
 891                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
 892                 "due to contention with another thread");
 893   }
 894   return (jlong) new_cap_until_GC;
 895 WB_END
 896 
 897 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
 898   return (jlong) MetaspaceGC::capacity_until_GC();
 899 WB_END
 900 
 901 //Some convenience methods to deal with objects from java
 902 int WhiteBox::offset_for_field(const char* field_name, oop object,
 903     Symbol* signature_symbol) {
 904   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
 905   Thread* THREAD = Thread::current();
 906 
 907   //Get the class of our object
 908   Klass* arg_klass = object->klass();
 909   //Turn it into an instance-klass
 910   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
 911 
 912   //Create symbols to look for in the class
 913   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
 914       THREAD);
 915 
 916   //To be filled in with an offset of the field we're looking for
 917   fieldDescriptor fd;
 918 
 919   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
 920   if (res == NULL) {
 921     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
 922         name_symbol->as_C_string());
 923     fatal("Invalid layout of preloaded class");
 924   }
 925 
 926   //fetch the field at the offset we've found
 927   int dest_offset = fd.offset();
 928 
 929   return dest_offset;
 930 }
 931 
 932 
 933 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
 934   int offset = offset_for_field(field_name, object,
 935       vmSymbols::string_signature());
 936   oop string = object->obj_field(offset);
 937   if (string == NULL) {
 938     return NULL;
 939   }
 940   const char* ret = java_lang_String::as_utf8_string(string);
 941   return ret;
 942 }
 943 
 944 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
 945   int offset =
 946       offset_for_field(field_name, object, vmSymbols::bool_signature());
 947   bool ret = (object->bool_field(offset) == JNI_TRUE);
 948   return ret;
 949 }
 950 
 951 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
 952   ResourceMark rm;
 953   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
 954 
 955   //  one by one registration natives for exception catching
 956   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
 957   CHECK_JNI_EXCEPTION(env);
 958   for (int i = 0, n = method_count; i < n; ++i) {
 959     // Skip dummy entries
 960     if (method_array[i].fnPtr == NULL) continue;
 961     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
 962       jthrowable throwable_obj = env->ExceptionOccurred();
 963       if (throwable_obj != NULL) {
 964         env->ExceptionClear();
 965         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
 966           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
 967           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
 968           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
 969               method_array[i].name, method_array[i].signature);
 970         }
 971       } else {
 972         // Registration failed unexpectedly.
 973         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
 974             method_array[i].name, method_array[i].signature);
 975         env->UnregisterNatives(wbclass);
 976         break;
 977       }
 978     }
 979   }
 980 }
 981 
 982 #define CC (char*)
 983 
 984 static JNINativeMethod methods[] = {
 985   {CC"getObjectAddress",   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
 986   {CC"getObjectSize",      CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
 987   {CC"isObjectInOldGen",   CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
 988   {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
 989   {CC"isClassAlive0",      CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
 990   {CC"parseCommandLine",
 991       CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
 992       (void*) &WB_ParseCommandLine
 993   },
 994   {CC"getCompressedOopsMaxHeapSize", CC"()J",
 995       (void*)&WB_GetCompressedOopsMaxHeapSize},
 996   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
 997   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
 998   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
 999   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
1000 #if INCLUDE_ALL_GCS
1001   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
1002   {CC"g1IsHumongous",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
1003   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
1004   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
1005 #endif // INCLUDE_ALL_GCS
1006 #if INCLUDE_NMT
1007   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
1008   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
1009   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
1010   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
1011   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
1012   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
1013   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
1014   {CC"NMTOverflowHashBucket", CC"(J)V",               (void*)&WB_NMTOverflowHashBucket},
1015   {CC"NMTIsDetailSupported",CC"()Z",                  (void*)&WB_NMTIsDetailSupported},
1016   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
1017 #endif // INCLUDE_NMT
1018   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
1019   {CC"deoptimizeMethod",   CC"(Ljava/lang/reflect/Executable;Z)I",
1020                                                       (void*)&WB_DeoptimizeMethod  },
1021   {CC"isMethodCompiled",   CC"(Ljava/lang/reflect/Executable;Z)Z",
1022                                                       (void*)&WB_IsMethodCompiled  },
1023   {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1024                                                       (void*)&WB_IsMethodCompilable},
1025   {CC"isMethodQueuedForCompilation",
1026       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
1027   {CC"makeMethodNotCompilable",
1028       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
1029   {CC"testSetDontInlineMethod",
1030       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
1031   {CC"getMethodCompilationLevel",
1032       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
1033   {CC"getMethodEntryBci",
1034       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
1035   {CC"getCompileQueueSize",
1036       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
1037   {CC"testSetForceInlineMethod",
1038       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
1039   {CC"enqueueMethodForCompilation",
1040       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
1041   {CC"clearMethodState",
1042       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
1043   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1044   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1045   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1046   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1047   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1048   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1049   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1050   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1051   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
1052                                                       (void*)&WB_SetStringVMFlag},
1053   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1054                                                       (void*)&WB_GetBooleanVMFlag},
1055   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1056                                                       (void*)&WB_GetIntxVMFlag},
1057   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1058                                                       (void*)&WB_GetUintxVMFlag},
1059   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
1060                                                       (void*)&WB_GetUint64VMFlag},
1061   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1062                                                       (void*)&WB_GetSizeTVMFlag},
1063   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
1064                                                       (void*)&WB_GetDoubleVMFlag},
1065   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
1066                                                       (void*)&WB_GetStringVMFlag},
1067   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
1068   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
1069   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
1070   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
1071   {CC"allocateMetaspace",
1072      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
1073   {CC"freeMetaspace",
1074      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
1075   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
1076   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
1077   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
1078   {CC"getNMethod",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1079                                                       (void*)&WB_GetNMethod         },
1080   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
1081   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
1082 };
1083 
1084 #undef CC
1085 
1086 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1087   {
1088     if (WhiteBoxAPI) {
1089       // Make sure that wbclass is loaded by the null classloader
1090       instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1091       Handle loader(ikh->class_loader());
1092       if (loader.is_null()) {
1093         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1094         WhiteBox::register_extended(env, wbclass, thread);
1095         WhiteBox::set_used();
1096       }
1097     }
1098   }
1099 JVM_END