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     // Mark all OSR compiled versions for deoptimization
 392     while ((code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false, true)) != NULL) {
 393       code->mark_for_deoptimization();
 394       ++result;
 395     }
 396   } else {
 397     code = mh->code();
 398   }
 399   if (code != NULL) {
 400     code->mark_for_deoptimization();
 401     ++result;
 402   }
 403   result += CodeCache::mark_for_deoptimization(mh());
 404   if (result > 0) {
 405     VM_Deoptimize op;
 406     VMThread::execute(&op);
 407   }
 408   return result;
 409 WB_END
 410 
 411 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 412   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 413   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 414   MutexLockerEx mu(Compile_lock);
 415   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 416   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 417   if (code == NULL) {
 418     return JNI_FALSE;
 419   }
 420   return (code->is_alive() && !code->is_marked_for_deoptimization());
 421 WB_END
 422 
 423 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 424   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 425   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 426   MutexLockerEx mu(Compile_lock);
 427   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 428   if (is_osr) {
 429     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 430   } else {
 431     return CompilationPolicy::can_be_compiled(mh, comp_level);
 432   }
 433 WB_END
 434 
 435 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 436   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 437   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 438   MutexLockerEx mu(Compile_lock);
 439   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 440   return mh->queued_for_compilation();
 441 WB_END
 442 
 443 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 444   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 445   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 446   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 447   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 448   return (code != NULL ? code->comp_level() : CompLevel_none);
 449 WB_END
 450 
 451 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 452   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 453   CHECK_JNI_EXCEPTION(env);
 454   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 455   if (is_osr) {
 456     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 457   } else {
 458     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 459   }
 460 WB_END
 461 
 462 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 463   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 464   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 465   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 466   nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 467   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 468 WB_END
 469 
 470 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 471   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 472   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 473   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 474   bool result = mh->dont_inline();
 475   mh->set_dont_inline(value == JNI_TRUE);
 476   return result;
 477 WB_END
 478 
 479 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 480   if (comp_level == CompLevel_any) {
 481     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 482         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 483   } else {
 484     return CompileBroker::queue_size(comp_level);
 485   }
 486 WB_END
 487 
 488 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 489   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 490   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 491   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 492   bool result = mh->force_inline();
 493   mh->set_force_inline(value == JNI_TRUE);
 494   return result;
 495 WB_END
 496 
 497 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
 498   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 499   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 500   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 501   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
 502   MutexLockerEx mu(Compile_lock);
 503   return (mh->queued_for_compilation() || nm != NULL);
 504 WB_END
 505 
 506 class VM_WhiteBoxOperation : public VM_Operation {
 507  public:
 508   VM_WhiteBoxOperation()                         { }
 509   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
 510   bool allow_nested_vm_operations() const        { return true; }
 511 };
 512 
 513 class AlwaysFalseClosure : public BoolObjectClosure {
 514  public:
 515   bool do_object_b(oop p) { return false; }
 516 };
 517 
 518 static AlwaysFalseClosure always_false;
 519 
 520 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation {
 521  public:
 522   VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { }
 523   void doit() {
 524     _mdo->clean_method_data(&always_false);
 525   }
 526  private:
 527   MethodData* _mdo;
 528 };
 529 
 530 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
 531   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 532   CHECK_JNI_EXCEPTION(env);
 533   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 534   MutexLockerEx mu(Compile_lock);
 535   MethodData* mdo = mh->method_data();
 536   MethodCounters* mcs = mh->method_counters();
 537 
 538   if (mdo != NULL) {
 539     mdo->init();
 540     ResourceMark rm;
 541     int arg_count = mdo->method()->size_of_parameters();
 542     for (int i = 0; i < arg_count; i++) {
 543       mdo->set_arg_modified(i, 0);
 544     }
 545     VM_WhiteBoxCleanMethodData op(mdo);
 546     VMThread::execute(&op);
 547   }
 548 
 549   mh->clear_not_c1_compilable();
 550   mh->clear_not_c2_compilable();
 551   mh->clear_not_c2_osr_compilable();
 552   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
 553   if (mcs != NULL) {
 554     mcs->backedge_counter()->init();
 555     mcs->invocation_counter()->init();
 556     mcs->set_interpreter_invocation_count(0);
 557     mcs->set_interpreter_throwout_count(0);
 558 
 559 #ifdef TIERED
 560     mcs->set_rate(0.0F);
 561     mh->set_prev_event_count(0);
 562     mh->set_prev_time(0);
 563 #endif
 564   }
 565 WB_END
 566 
 567 template <typename T>
 568 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*)) {
 569   if (name == NULL) {
 570     return false;
 571   }
 572   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 573   const char* flag_name = env->GetStringUTFChars(name, NULL);
 574   bool result = (*TAt)(flag_name, value);
 575   env->ReleaseStringUTFChars(name, flag_name);
 576   return result;
 577 }
 578 
 579 template <typename T>
 580 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
 581   if (name == NULL) {
 582     return false;
 583   }
 584   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 585   const char* flag_name = env->GetStringUTFChars(name, NULL);
 586   bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
 587   env->ReleaseStringUTFChars(name, flag_name);
 588   return result;
 589 }
 590 
 591 template <typename T>
 592 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
 593   ResourceMark rm(thread);
 594   jclass clazz = env->FindClass(name->as_C_string());
 595   CHECK_JNI_EXCEPTION_(env, NULL);
 596   jmethodID methodID = env->GetStaticMethodID(clazz,
 597         vmSymbols::valueOf_name()->as_C_string(),
 598         sig->as_C_string());
 599   CHECK_JNI_EXCEPTION_(env, NULL);
 600   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
 601   CHECK_JNI_EXCEPTION_(env, NULL);
 602   return result;
 603 }
 604 
 605 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
 606   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
 607 }
 608 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
 609   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
 610 }
 611 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
 612   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
 613 }
 614 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
 615   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
 616 }*/
 617 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
 618   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
 619 }
 620 
 621 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
 622   bool result;
 623   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
 624     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 625     return booleanBox(thread, env, result);
 626   }
 627   return NULL;
 628 WB_END
 629 
 630 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
 631   intx result;
 632   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
 633     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 634     return longBox(thread, env, result);
 635   }
 636   return NULL;
 637 WB_END
 638 
 639 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
 640   uintx result;
 641   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
 642     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 643     return longBox(thread, env, result);
 644   }
 645   return NULL;
 646 WB_END
 647 
 648 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
 649   uint64_t result;
 650   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
 651     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 652     return longBox(thread, env, result);
 653   }
 654   return NULL;
 655 WB_END
 656 
 657 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
 658   uintx result;
 659   if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
 660     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 661     return longBox(thread, env, result);
 662   }
 663   return NULL;
 664 WB_END
 665 
 666 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
 667   double result;
 668   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
 669     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 670     return doubleBox(thread, env, result);
 671   }
 672   return NULL;
 673 WB_END
 674 
 675 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
 676   ccstr ccstrResult;
 677   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
 678     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 679     jstring result = env->NewStringUTF(ccstrResult);
 680     CHECK_JNI_EXCEPTION_(env, NULL);
 681     return result;
 682   }
 683   return NULL;
 684 WB_END
 685 
 686 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
 687   bool result = value == JNI_TRUE ? true : false;
 688   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
 689 WB_END
 690 
 691 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 692   intx result = value;
 693   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
 694 WB_END
 695 
 696 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 697   uintx result = value;
 698   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
 699 WB_END
 700 
 701 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 702   uint64_t result = value;
 703   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
 704 WB_END
 705 
 706 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 707   size_t result = value;
 708   SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
 709 WB_END
 710 
 711 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
 712   double result = value;
 713   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
 714 WB_END
 715 
 716 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
 717   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 718   const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
 719   ccstr ccstrResult = ccstrValue;
 720   bool needFree;
 721   {
 722     ThreadInVMfromNative ttvfn(thread); // back to VM
 723     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
 724   }
 725   if (value != NULL) {
 726     env->ReleaseStringUTFChars(value, ccstrValue);
 727   }
 728   if (needFree) {
 729     FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
 730   }
 731 WB_END
 732 
 733 
 734 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
 735   ResourceMark rm(THREAD);
 736   int len;
 737   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
 738   return (StringTable::lookup(name, len) != NULL);
 739 WB_END
 740 
 741 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
 742   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
 743   Universe::heap()->collect(GCCause::_last_ditch_collection);
 744 #if INCLUDE_ALL_GCS
 745   if (UseG1GC) {
 746     // Needs to be cleared explicitly for G1
 747     Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
 748   }
 749 #endif // INCLUDE_ALL_GCS
 750 WB_END
 751 
 752 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
 753   Universe::heap()->collect(GCCause::_wb_young_gc);
 754 WB_END
 755 
 756 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
 757   // static+volatile in order to force the read to happen
 758   // (not be eliminated by the compiler)
 759   static char c;
 760   static volatile char* p;
 761 
 762   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
 763   if (p == NULL) {
 764     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
 765   }
 766 
 767   c = *p;
 768 WB_END
 769 
 770 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
 771   const char* cpu_features = VM_Version::cpu_features();
 772   ThreadToNativeFromVM ttn(thread);
 773   jstring features_string = env->NewStringUTF(cpu_features);
 774 
 775   CHECK_JNI_EXCEPTION_(env, NULL);
 776 
 777   return features_string;
 778 WB_END
 779 
 780 
 781 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 782   ResourceMark rm(THREAD);
 783   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 784   CHECK_JNI_EXCEPTION_(env, NULL);
 785   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 786   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 787   jobjectArray result = NULL;
 788   if (code == NULL) {
 789     return result;
 790   }
 791   int insts_size = code->insts_size();
 792 
 793   ThreadToNativeFromVM ttn(thread);
 794   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
 795   CHECK_JNI_EXCEPTION_(env, NULL);
 796   result = env->NewObjectArray(2, clazz, NULL);
 797   if (result == NULL) {
 798     return result;
 799   }
 800 
 801   jobject obj = integerBox(thread, env, code->comp_level());
 802   CHECK_JNI_EXCEPTION_(env, NULL);
 803   env->SetObjectArrayElement(result, 0, obj);
 804 
 805   jbyteArray insts = env->NewByteArray(insts_size);
 806   CHECK_JNI_EXCEPTION_(env, NULL);
 807   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
 808   env->SetObjectArrayElement(result, 1, insts);
 809 
 810   return result;
 811 WB_END
 812 
 813 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
 814   return (jlong) Thread::current()->stack_size();
 815 WB_END
 816 
 817 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
 818   JavaThread* t = JavaThread::current();
 819   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
 820 WB_END
 821 
 822 int WhiteBox::array_bytes_to_length(size_t bytes) {
 823   return Array<u1>::bytes_to_length(bytes);
 824 }
 825 
 826 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
 827   if (size < 0) {
 828     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 829         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
 830   }
 831 
 832   oop class_loader_oop = JNIHandles::resolve(class_loader);
 833   ClassLoaderData* cld = class_loader_oop != NULL
 834       ? java_lang_ClassLoader::loader_data(class_loader_oop)
 835       : ClassLoaderData::the_null_class_loader_data();
 836 
 837   void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
 838 
 839   return (jlong)(uintptr_t)metadata;
 840 WB_END
 841 
 842 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
 843   oop class_loader_oop = JNIHandles::resolve(class_loader);
 844   ClassLoaderData* cld = class_loader_oop != NULL
 845       ? java_lang_ClassLoader::loader_data(class_loader_oop)
 846       : ClassLoaderData::the_null_class_loader_data();
 847 
 848   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
 849 WB_END
 850 
 851 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
 852   if (inc < 0) {
 853     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 854         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
 855   }
 856 
 857   jlong max_size_t = (jlong) ((size_t) -1);
 858   if (inc > max_size_t) {
 859     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 860         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
 861   }
 862 
 863   size_t new_cap_until_GC = 0;
 864   size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
 865   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
 866   if (!success) {
 867     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
 868                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
 869                 "due to contention with another thread");
 870   }
 871   return (jlong) new_cap_until_GC;
 872 WB_END
 873 
 874 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
 875   return (jlong) MetaspaceGC::capacity_until_GC();
 876 WB_END
 877 
 878 //Some convenience methods to deal with objects from java
 879 int WhiteBox::offset_for_field(const char* field_name, oop object,
 880     Symbol* signature_symbol) {
 881   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
 882   Thread* THREAD = Thread::current();
 883 
 884   //Get the class of our object
 885   Klass* arg_klass = object->klass();
 886   //Turn it into an instance-klass
 887   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
 888 
 889   //Create symbols to look for in the class
 890   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
 891       THREAD);
 892 
 893   //To be filled in with an offset of the field we're looking for
 894   fieldDescriptor fd;
 895 
 896   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
 897   if (res == NULL) {
 898     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
 899         name_symbol->as_C_string());
 900     fatal("Invalid layout of preloaded class");
 901   }
 902 
 903   //fetch the field at the offset we've found
 904   int dest_offset = fd.offset();
 905 
 906   return dest_offset;
 907 }
 908 
 909 
 910 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
 911   int offset = offset_for_field(field_name, object,
 912       vmSymbols::string_signature());
 913   oop string = object->obj_field(offset);
 914   if (string == NULL) {
 915     return NULL;
 916   }
 917   const char* ret = java_lang_String::as_utf8_string(string);
 918   return ret;
 919 }
 920 
 921 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
 922   int offset =
 923       offset_for_field(field_name, object, vmSymbols::bool_signature());
 924   bool ret = (object->bool_field(offset) == JNI_TRUE);
 925   return ret;
 926 }
 927 
 928 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
 929   ResourceMark rm;
 930   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
 931 
 932   //  one by one registration natives for exception catching
 933   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
 934   CHECK_JNI_EXCEPTION(env);
 935   for (int i = 0, n = method_count; i < n; ++i) {
 936     // Skip dummy entries
 937     if (method_array[i].fnPtr == NULL) continue;
 938     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
 939       jthrowable throwable_obj = env->ExceptionOccurred();
 940       if (throwable_obj != NULL) {
 941         env->ExceptionClear();
 942         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
 943           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
 944           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
 945           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
 946               method_array[i].name, method_array[i].signature);
 947         }
 948       } else {
 949         // Registration failed unexpectedly.
 950         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
 951             method_array[i].name, method_array[i].signature);
 952         env->UnregisterNatives(wbclass);
 953         break;
 954       }
 955     }
 956   }
 957 }
 958 
 959 #define CC (char*)
 960 
 961 static JNINativeMethod methods[] = {
 962   {CC"getObjectAddress",   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
 963   {CC"getObjectSize",      CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
 964   {CC"isObjectInOldGen",   CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
 965   {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
 966   {CC"isClassAlive0",      CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
 967   {CC"parseCommandLine",
 968       CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
 969       (void*) &WB_ParseCommandLine
 970   },
 971   {CC"getCompressedOopsMaxHeapSize", CC"()J",
 972       (void*)&WB_GetCompressedOopsMaxHeapSize},
 973   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
 974   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
 975   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
 976   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
 977 #if INCLUDE_ALL_GCS
 978   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
 979   {CC"g1IsHumongous",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
 980   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
 981   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
 982 #endif // INCLUDE_ALL_GCS
 983 #if INCLUDE_NMT
 984   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
 985   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
 986   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
 987   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
 988   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
 989   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
 990   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
 991   {CC"NMTOverflowHashBucket", CC"(J)V",               (void*)&WB_NMTOverflowHashBucket},
 992   {CC"NMTIsDetailSupported",CC"()Z",                  (void*)&WB_NMTIsDetailSupported},
 993   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
 994 #endif // INCLUDE_NMT
 995   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
 996   {CC"deoptimizeMethod",   CC"(Ljava/lang/reflect/Executable;Z)I",
 997                                                       (void*)&WB_DeoptimizeMethod  },
 998   {CC"isMethodCompiled",   CC"(Ljava/lang/reflect/Executable;Z)Z",
 999                                                       (void*)&WB_IsMethodCompiled  },
1000   {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1001                                                       (void*)&WB_IsMethodCompilable},
1002   {CC"isMethodQueuedForCompilation",
1003       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
1004   {CC"makeMethodNotCompilable",
1005       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
1006   {CC"testSetDontInlineMethod",
1007       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
1008   {CC"getMethodCompilationLevel",
1009       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
1010   {CC"getMethodEntryBci",
1011       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
1012   {CC"getCompileQueueSize",
1013       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
1014   {CC"testSetForceInlineMethod",
1015       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
1016   {CC"enqueueMethodForCompilation",
1017       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
1018   {CC"clearMethodState",
1019       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
1020   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1021   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1022   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1023   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1024   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1025   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1026   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
1027                                                       (void*)&WB_SetStringVMFlag},
1028   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1029                                                       (void*)&WB_GetBooleanVMFlag},
1030   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1031                                                       (void*)&WB_GetIntxVMFlag},
1032   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1033                                                       (void*)&WB_GetUintxVMFlag},
1034   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
1035                                                       (void*)&WB_GetUint64VMFlag},
1036   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1037                                                       (void*)&WB_GetSizeTVMFlag},
1038   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
1039                                                       (void*)&WB_GetDoubleVMFlag},
1040   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
1041                                                       (void*)&WB_GetStringVMFlag},
1042   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
1043   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
1044   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
1045   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
1046   {CC"allocateMetaspace",
1047      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
1048   {CC"freeMetaspace",
1049      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
1050   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
1051   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
1052   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
1053   {CC"getNMethod",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1054                                                       (void*)&WB_GetNMethod         },
1055   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
1056   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
1057 };
1058 
1059 #undef CC
1060 
1061 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1062   {
1063     if (WhiteBoxAPI) {
1064       // Make sure that wbclass is loaded by the null classloader
1065       instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1066       Handle loader(ikh->class_loader());
1067       if (loader.is_null()) {
1068         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1069         WhiteBox::register_extended(env, wbclass, thread);
1070         WhiteBox::set_used();
1071       }
1072     }
1073   }
1074 JVM_END