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 "memory/metadataFactory.hpp"
  28 #include "memory/universe.hpp"
  29 #include "oops/oop.inline.hpp"
  30 
  31 #include "classfile/symbolTable.hpp"
  32 #include "classfile/classLoaderData.hpp"
  33 
  34 #include "prims/whitebox.hpp"
  35 #include "prims/wbtestmethods/parserTests.hpp"
  36 
  37 #include "runtime/arguments.hpp"
  38 #include "runtime/interfaceSupport.hpp"
  39 #include "runtime/os.hpp"
  40 #include "utilities/array.hpp"
  41 #include "utilities/debug.hpp"
  42 #include "utilities/macros.hpp"
  43 #include "utilities/exceptions.hpp"
  44 
  45 #if INCLUDE_ALL_GCS
  46 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
  47 #include "gc_implementation/g1/concurrentMark.hpp"
  48 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
  49 #include "gc_implementation/g1/heapRegionRemSet.hpp"
  50 #endif // INCLUDE_ALL_GCS
  51 
  52 #if INCLUDE_NMT
  53 #include "services/mallocSiteTable.hpp"
  54 #include "services/memTracker.hpp"
  55 #include "utilities/nativeCallStack.hpp"
  56 #endif // INCLUDE_NMT
  57 
  58 #include "compiler/compileBroker.hpp"
  59 #include "runtime/compilationPolicy.hpp"
  60 
  61 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  62 
  63 #define SIZE_T_MAX_VALUE ((size_t) -1)
  64 
  65 bool WhiteBox::_used = false;
  66 
  67 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  68   return (jlong)(void*)JNIHandles::resolve(obj);
  69 WB_END
  70 
  71 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  72   return heapOopSize;
  73 WB_END
  74 
  75 
  76 class WBIsKlassAliveClosure : public KlassClosure {
  77     Symbol* _name;
  78     bool _found;
  79 public:
  80     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
  81 
  82     void do_klass(Klass* k) {
  83       if (_found) return;
  84       Symbol* ksym = k->name();
  85       if (ksym->fast_compare(_name) == 0) {
  86         _found = true;
  87       }
  88     }
  89 
  90     bool found() const {
  91         return _found;
  92     }
  93 };
  94 
  95 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
  96   Handle h_name = JNIHandles::resolve(name);
  97   if (h_name.is_null()) return false;
  98   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
  99   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 100 
 101   WBIsKlassAliveClosure closure(sym);
 102   ClassLoaderDataGraph::classes_do(&closure);
 103 
 104   return closure.found();
 105 WB_END
 106 
 107 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 108   return (jlong)Arguments::max_heap_for_compressed_oops();
 109 }
 110 WB_END
 111 
 112 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 113   CollectorPolicy * p = Universe::heap()->collector_policy();
 114   gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
 115     SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Min alignment "SIZE_FORMAT" Max alignment "SIZE_FORMAT,
 116     p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
 117     p->space_alignment(), p->heap_alignment());
 118 }
 119 WB_END
 120 
 121 #ifndef PRODUCT
 122 // Forward declaration
 123 void TestReservedSpace_test();
 124 void TestReserveMemorySpecial_test();
 125 void TestVirtualSpace_test();
 126 void TestMetaspaceAux_test();
 127 #endif
 128 
 129 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 130 #ifndef PRODUCT
 131   TestReservedSpace_test();
 132   TestReserveMemorySpecial_test();
 133   TestVirtualSpace_test();
 134   TestMetaspaceAux_test();
 135 #endif
 136 WB_END
 137 
 138 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 139   size_t granularity = os::vm_allocation_granularity();
 140   ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
 141   VirtualSpace vs;
 142   vs.initialize(rhs, 50 * granularity);
 143 
 144   //Check if constraints are complied
 145   if (!( UseCompressedOops && rhs.base() != NULL &&
 146          Universe::narrow_oop_base() != NULL &&
 147          Universe::narrow_oop_use_implicit_null_checks() )) {
 148     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 149                   "\tUseCompressedOops is %d\n"
 150                   "\trhs.base() is "PTR_FORMAT"\n"
 151                   "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
 152                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
 153                   UseCompressedOops,
 154                   rhs.base(),
 155                   Universe::narrow_oop_base(),
 156                   Universe::narrow_oop_use_implicit_null_checks());
 157     return;
 158   }
 159   tty->print_cr("Reading from no access area... ");
 160   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 161                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 162 WB_END
 163 
 164 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 165                                            size_t magnitude, size_t iterations) {
 166   size_t granularity = os::vm_allocation_granularity();
 167   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
 168   VirtualSpace vs;
 169   if (!vs.initialize(rhs, 0)) {
 170     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 171     return 3;
 172   }
 173 
 174   long seed = os::random();
 175   tty->print_cr("Random seed is %ld", seed);
 176   os::init_random(seed);
 177 
 178   for (size_t i = 0; i < iterations; i++) {
 179 
 180     // Whether we will shrink or grow
 181     bool shrink = os::random() % 2L == 0;
 182 
 183     // Get random delta to resize virtual space
 184     size_t delta = (size_t)os::random() % magnitude;
 185 
 186     // If we are about to shrink virtual space below zero, then expand instead
 187     if (shrink && vs.committed_size() < delta) {
 188       shrink = false;
 189     }
 190 
 191     // Resizing by delta
 192     if (shrink) {
 193       vs.shrink_by(delta);
 194     } else {
 195       // If expanding fails expand_by will silently return false
 196       vs.expand_by(delta, true);
 197     }
 198   }
 199   return 0;
 200 }
 201 
 202 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 203         jlong reserved_space_size, jlong magnitude, jlong iterations))
 204   tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
 205                 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
 206                 iterations);
 207   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 208     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 209     return 1;
 210   }
 211 
 212   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 213   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 214   if (sizeof(size_t) < sizeof(jlong)) {
 215     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 216     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 217         || iterations > size_t_max_value) {
 218       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 219       return 2;
 220     }
 221   }
 222 
 223   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 224                                         (size_t) magnitude, (size_t) iterations);
 225 WB_END
 226 
 227 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 228   oop p = JNIHandles::resolve(obj);
 229 #if INCLUDE_ALL_GCS
 230   if (UseG1GC) {
 231     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 232     const HeapRegion* hr = g1->heap_region_containing(p);
 233     if (hr == NULL) {
 234       return false;
 235     }
 236     return !(hr->is_young());
 237   } else if (UseParallelGC) {
 238     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 239     return !psh->is_in_young(p);
 240   }
 241 #endif // INCLUDE_ALL_GCS
 242   GenCollectedHeap* gch = GenCollectedHeap::heap();
 243   return !gch->is_in_young(p);
 244 WB_END
 245 
 246 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 247   oop p = JNIHandles::resolve(obj);
 248   return p->size() * HeapWordSize;
 249 WB_END
 250 
 251 #if INCLUDE_ALL_GCS
 252 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 253   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 254   oop result = JNIHandles::resolve(obj);
 255   const HeapRegion* hr = g1->heap_region_containing(result);
 256   return hr->isHumongous();
 257 WB_END
 258 
 259 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 260   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 261   size_t nr = g1->num_free_regions();
 262   return (jlong)nr;
 263 WB_END
 264 
 265 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 266   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 267   ConcurrentMark* cm = g1->concurrent_mark();
 268   return cm->concurrent_marking_in_progress();
 269 WB_END
 270 
 271 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 272   return (jint)HeapRegion::GrainBytes;
 273 WB_END
 274 #endif // INCLUDE_ALL_GCS
 275 
 276 #if INCLUDE_NMT
 277 // Alloc memory using the test memory type so that we can use that to see if
 278 // NMT picks it up correctly
 279 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 280   jlong addr = 0;
 281     addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 282   return addr;
 283 WB_END
 284 
 285 // Alloc memory with pseudo call stack. The test can create psudo malloc
 286 // allocation site to stress the malloc tracking.
 287 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 288   address pc = (address)(size_t)pseudo_stack;
 289   NativeCallStack stack(&pc, 1);
 290   return (jlong)os::malloc(size, mtTest, stack);
 291 WB_END
 292 
 293 // Free the memory allocated by NMTAllocTest
 294 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 295   os::free((void*)(uintptr_t)mem, mtTest);
 296 WB_END
 297 
 298 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 299   jlong addr = 0;
 300 
 301     addr = (jlong)(uintptr_t)os::reserve_memory(size);
 302     MemTracker::record_virtual_memory_type((address)addr, mtTest);
 303 
 304   return addr;
 305 WB_END
 306 
 307 
 308 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 309   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 310   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 311 WB_END
 312 
 313 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 314   os::uncommit_memory((char *)(uintptr_t)addr, size);
 315 WB_END
 316 
 317 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 318   os::release_memory((char *)(uintptr_t)addr, size);
 319 WB_END
 320 
 321 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
 322   return MemTracker::tracking_level() == NMT_detail;
 323 WB_END
 324 
 325 WB_ENTRY(void, WB_NMTOverflowHashBucket(JNIEnv* env, jobject o, jlong num))
 326   address pc = (address)1;
 327   for (jlong index = 0; index < num; index ++) {
 328     NativeCallStack stack(&pc, 1);
 329     os::malloc(0, mtTest, stack);
 330     pc += MallocSiteTable::hash_buckets();
 331   }
 332 WB_END
 333 
 334 
 335 #endif // INCLUDE_NMT
 336 
 337 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 338   assert(method != NULL, "method should not be null");
 339   ThreadToNativeFromVM ttn(thread);
 340   return env->FromReflectedMethod(method);
 341 }
 342 
 343 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 344   MutexLockerEx mu(Compile_lock);
 345   CodeCache::mark_all_nmethods_for_deoptimization();
 346   VM_Deoptimize op;
 347   VMThread::execute(&op);
 348 WB_END
 349 
 350 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 351   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 352   int result = 0;
 353   CHECK_JNI_EXCEPTION_(env, result);
 354   MutexLockerEx mu(Compile_lock);
 355   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 356   nmethod* code;
 357   if (is_osr) {
 358     int bci = InvocationEntryBci;
 359     while ((code = mh->lookup_osr_nmethod_for(bci, CompLevel_none, false)) != NULL) {
 360       code->mark_for_deoptimization();
 361       ++result;
 362       bci = code->osr_entry_bci() + 1;
 363     }
 364   } else {
 365     code = mh->code();
 366   }
 367   if (code != NULL) {
 368     code->mark_for_deoptimization();
 369     ++result;
 370   }
 371   result += CodeCache::mark_for_deoptimization(mh());
 372   if (result > 0) {
 373     VM_Deoptimize op;
 374     VMThread::execute(&op);
 375   }
 376   return result;
 377 WB_END
 378 
 379 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 380   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 381   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 382   MutexLockerEx mu(Compile_lock);
 383   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 384   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 385   if (code == NULL) {
 386     return JNI_FALSE;
 387   }
 388   return (code->is_alive() && !code->is_marked_for_deoptimization());
 389 WB_END
 390 
 391 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 392   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 393   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 394   MutexLockerEx mu(Compile_lock);
 395   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 396   if (is_osr) {
 397     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 398   } else {
 399     return CompilationPolicy::can_be_compiled(mh, comp_level);
 400   }
 401 WB_END
 402 
 403 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 404   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 405   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 406   MutexLockerEx mu(Compile_lock);
 407   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 408   return mh->queued_for_compilation();
 409 WB_END
 410 
 411 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 412   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 413   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 414   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 415   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 416   return (code != NULL ? code->comp_level() : CompLevel_none);
 417 WB_END
 418 
 419 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 420   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 421   CHECK_JNI_EXCEPTION(env);
 422   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 423   if (is_osr) {
 424     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 425   } else {
 426     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 427   }
 428 WB_END
 429 
 430 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 431   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 432   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 433   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 434   nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 435   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 436 WB_END
 437 
 438 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 439   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 440   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 441   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 442   bool result = mh->dont_inline();
 443   mh->set_dont_inline(value == JNI_TRUE);
 444   return result;
 445 WB_END
 446 
 447 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 448   if (comp_level == CompLevel_any) {
 449     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 450         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 451   } else {
 452     return CompileBroker::queue_size(comp_level);
 453   }
 454 WB_END
 455 
 456 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 457   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 458   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 459   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 460   bool result = mh->force_inline();
 461   mh->set_force_inline(value == JNI_TRUE);
 462   return result;
 463 WB_END
 464 
 465 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
 466   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 467   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 468   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 469   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
 470   MutexLockerEx mu(Compile_lock);
 471   return (mh->queued_for_compilation() || nm != NULL);
 472 WB_END
 473 
 474 class VM_WhiteBoxOperation : public VM_Operation {
 475  public:
 476   VM_WhiteBoxOperation()                         { }
 477   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
 478   bool allow_nested_vm_operations() const        { return true; }
 479 };
 480 
 481 class AlwaysFalseClosure : public BoolObjectClosure {
 482  public:
 483   bool do_object_b(oop p) { return false; }
 484 };
 485 
 486 static AlwaysFalseClosure always_false;
 487 
 488 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation {
 489  public:
 490   VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { }
 491   void doit() {
 492     _mdo->clean_method_data(&always_false);
 493   }
 494  private:
 495   MethodData* _mdo;
 496 };
 497 
 498 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
 499   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 500   CHECK_JNI_EXCEPTION(env);
 501   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 502   MutexLockerEx mu(Compile_lock);
 503   MethodData* mdo = mh->method_data();
 504   MethodCounters* mcs = mh->method_counters();
 505 
 506   if (mdo != NULL) {
 507     mdo->init();
 508     ResourceMark rm;
 509     int arg_count = mdo->method()->size_of_parameters();
 510     for (int i = 0; i < arg_count; i++) {
 511       mdo->set_arg_modified(i, 0);
 512     }
 513     VM_WhiteBoxCleanMethodData op(mdo);
 514     VMThread::execute(&op);
 515   }
 516 
 517   mh->clear_not_c1_compilable();
 518   mh->clear_not_c2_compilable();
 519   mh->clear_not_c2_osr_compilable();
 520   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
 521   if (mcs != NULL) {
 522     mcs->backedge_counter()->init();
 523     mcs->invocation_counter()->init();
 524     mcs->set_interpreter_invocation_count(0);
 525     mcs->set_interpreter_throwout_count(0);
 526 
 527 #ifdef TIERED
 528     mcs->set_rate(0.0F);
 529     mh->set_prev_event_count(0);
 530     mh->set_prev_time(0);
 531 #endif
 532   }
 533 WB_END
 534 
 535 template <typename T>
 536 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*)) {
 537   if (name == NULL) {
 538     return false;
 539   }
 540   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 541   const char* flag_name = env->GetStringUTFChars(name, NULL);
 542   bool result = (*TAt)(flag_name, value);
 543   env->ReleaseStringUTFChars(name, flag_name);
 544   return result;
 545 }
 546 
 547 template <typename T>
 548 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
 549   if (name == NULL) {
 550     return false;
 551   }
 552   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 553   const char* flag_name = env->GetStringUTFChars(name, NULL);
 554   bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
 555   env->ReleaseStringUTFChars(name, flag_name);
 556   return result;
 557 }
 558 
 559 template <typename T>
 560 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
 561   ResourceMark rm(thread);
 562   jclass clazz = env->FindClass(name->as_C_string());
 563   CHECK_JNI_EXCEPTION_(env, NULL);
 564   jmethodID methodID = env->GetStaticMethodID(clazz,
 565         vmSymbols::valueOf_name()->as_C_string(),
 566         sig->as_C_string());
 567   CHECK_JNI_EXCEPTION_(env, NULL);
 568   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
 569   CHECK_JNI_EXCEPTION_(env, NULL);
 570   return result;
 571 }
 572 
 573 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
 574   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
 575 }
 576 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
 577   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
 578 }
 579 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
 580   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
 581 }
 582 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
 583   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
 584 }*/
 585 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
 586   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
 587 }
 588 
 589 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
 590   bool result;
 591   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
 592     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 593     return booleanBox(thread, env, result);
 594   }
 595   return NULL;
 596 WB_END
 597 
 598 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
 599   intx result;
 600   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
 601     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 602     return longBox(thread, env, result);
 603   }
 604   return NULL;
 605 WB_END
 606 
 607 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
 608   uintx result;
 609   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
 610     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 611     return longBox(thread, env, result);
 612   }
 613   return NULL;
 614 WB_END
 615 
 616 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
 617   uint64_t result;
 618   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
 619     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 620     return longBox(thread, env, result);
 621   }
 622   return NULL;
 623 WB_END
 624 
 625 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
 626   double result;
 627   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
 628     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 629     return doubleBox(thread, env, result);
 630   }
 631   return NULL;
 632 WB_END
 633 
 634 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
 635   ccstr ccstrResult;
 636   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
 637     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 638     jstring result = env->NewStringUTF(ccstrResult);
 639     CHECK_JNI_EXCEPTION_(env, NULL);
 640     return result;
 641   }
 642   return NULL;
 643 WB_END
 644 
 645 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
 646   bool result = value == JNI_TRUE ? true : false;
 647   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
 648 WB_END
 649 
 650 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 651   intx result = value;
 652   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
 653 WB_END
 654 
 655 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 656   uintx result = value;
 657   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
 658 WB_END
 659 
 660 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 661   uint64_t result = value;
 662   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
 663 WB_END
 664 
 665 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
 666   double result = value;
 667   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
 668 WB_END
 669 
 670 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
 671   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 672   const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
 673   ccstr ccstrResult = ccstrValue;
 674   bool needFree;
 675   {
 676     ThreadInVMfromNative ttvfn(thread); // back to VM
 677     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
 678   }
 679   if (value != NULL) {
 680     env->ReleaseStringUTFChars(value, ccstrValue);
 681   }
 682   if (needFree) {
 683     FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
 684   }
 685 WB_END
 686 
 687 
 688 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
 689   ResourceMark rm(THREAD);
 690   int len;
 691   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
 692   return (StringTable::lookup(name, len) != NULL);
 693 WB_END
 694 
 695 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
 696   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
 697   Universe::heap()->collect(GCCause::_last_ditch_collection);
 698 #if INCLUDE_ALL_GCS
 699   if (UseG1GC) {
 700     // Needs to be cleared explicitly for G1
 701     Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
 702   }
 703 #endif // INCLUDE_ALL_GCS
 704 WB_END
 705 
 706 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
 707   Universe::heap()->collect(GCCause::_wb_young_gc);
 708 WB_END
 709 
 710 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
 711   // static+volatile in order to force the read to happen
 712   // (not be eliminated by the compiler)
 713   static char c;
 714   static volatile char* p;
 715 
 716   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
 717   if (p == NULL) {
 718     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
 719   }
 720 
 721   c = *p;
 722 WB_END
 723 
 724 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
 725   const char* cpu_features = VM_Version::cpu_features();
 726   ThreadToNativeFromVM ttn(thread);
 727   jstring features_string = env->NewStringUTF(cpu_features);
 728 
 729   CHECK_JNI_EXCEPTION_(env, NULL);
 730 
 731   return features_string;
 732 WB_END
 733 
 734 
 735 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 736   ResourceMark rm(THREAD);
 737   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 738   CHECK_JNI_EXCEPTION_(env, NULL);
 739   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 740   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 741   jobjectArray result = NULL;
 742   if (code == NULL) {
 743     return result;
 744   }
 745   int insts_size = code->insts_size();
 746 
 747   ThreadToNativeFromVM ttn(thread);
 748   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
 749   CHECK_JNI_EXCEPTION_(env, NULL);
 750   result = env->NewObjectArray(2, clazz, NULL);
 751   if (result == NULL) {
 752     return result;
 753   }
 754 
 755   jobject obj = integerBox(thread, env, code->comp_level());
 756   CHECK_JNI_EXCEPTION_(env, NULL);
 757   env->SetObjectArrayElement(result, 0, obj);
 758 
 759   jbyteArray insts = env->NewByteArray(insts_size);
 760   CHECK_JNI_EXCEPTION_(env, NULL);
 761   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
 762   env->SetObjectArrayElement(result, 1, insts);
 763 
 764   return result;
 765 WB_END
 766 
 767 
 768 int WhiteBox::array_bytes_to_length(size_t bytes) {
 769   return Array<u1>::bytes_to_length(bytes);
 770 }
 771 
 772 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
 773   if (size < 0) {
 774     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 775         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
 776   }
 777 
 778   oop class_loader_oop = JNIHandles::resolve(class_loader);
 779   ClassLoaderData* cld = class_loader_oop != NULL
 780       ? java_lang_ClassLoader::loader_data(class_loader_oop)
 781       : ClassLoaderData::the_null_class_loader_data();
 782 
 783   void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
 784 
 785   return (jlong)(uintptr_t)metadata;
 786 WB_END
 787 
 788 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
 789   oop class_loader_oop = JNIHandles::resolve(class_loader);
 790   ClassLoaderData* cld = class_loader_oop != NULL
 791       ? java_lang_ClassLoader::loader_data(class_loader_oop)
 792       : ClassLoaderData::the_null_class_loader_data();
 793 
 794   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
 795 WB_END
 796 
 797 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
 798   if (inc < 0) {
 799     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 800         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
 801   }
 802 
 803   jlong max_size_t = (jlong) ((size_t) -1);
 804   if (inc > max_size_t) {
 805     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 806         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
 807   }
 808 
 809   size_t new_cap_until_GC = 0;
 810   size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
 811   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
 812   if (!success) {
 813     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
 814                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
 815                 "due to contention with another thread");
 816   }
 817   return (jlong) new_cap_until_GC;
 818 WB_END
 819 
 820 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
 821   return (jlong) MetaspaceGC::capacity_until_GC();
 822 WB_END
 823 
 824 //Some convenience methods to deal with objects from java
 825 int WhiteBox::offset_for_field(const char* field_name, oop object,
 826     Symbol* signature_symbol) {
 827   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
 828   Thread* THREAD = Thread::current();
 829 
 830   //Get the class of our object
 831   Klass* arg_klass = object->klass();
 832   //Turn it into an instance-klass
 833   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
 834 
 835   //Create symbols to look for in the class
 836   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
 837       THREAD);
 838 
 839   //To be filled in with an offset of the field we're looking for
 840   fieldDescriptor fd;
 841 
 842   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
 843   if (res == NULL) {
 844     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
 845         name_symbol->as_C_string());
 846     fatal("Invalid layout of preloaded class");
 847   }
 848 
 849   //fetch the field at the offset we've found
 850   int dest_offset = fd.offset();
 851 
 852   return dest_offset;
 853 }
 854 
 855 
 856 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
 857   int offset = offset_for_field(field_name, object,
 858       vmSymbols::string_signature());
 859   oop string = object->obj_field(offset);
 860   if (string == NULL) {
 861     return NULL;
 862   }
 863   const char* ret = java_lang_String::as_utf8_string(string);
 864   return ret;
 865 }
 866 
 867 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
 868   int offset =
 869       offset_for_field(field_name, object, vmSymbols::bool_signature());
 870   bool ret = (object->bool_field(offset) == JNI_TRUE);
 871   return ret;
 872 }
 873 
 874 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
 875   ResourceMark rm;
 876   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
 877 
 878   //  one by one registration natives for exception catching
 879   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
 880   CHECK_JNI_EXCEPTION(env);
 881   for (int i = 0, n = method_count; i < n; ++i) {
 882     // Skip dummy entries
 883     if (method_array[i].fnPtr == NULL) continue;
 884     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
 885       jthrowable throwable_obj = env->ExceptionOccurred();
 886       if (throwable_obj != NULL) {
 887         env->ExceptionClear();
 888         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
 889           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
 890           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
 891           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
 892               method_array[i].name, method_array[i].signature);
 893         }
 894       } else {
 895         // Registration failed unexpectedly.
 896         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
 897             method_array[i].name, method_array[i].signature);
 898         env->UnregisterNatives(wbclass);
 899         break;
 900       }
 901     }
 902   }
 903 }
 904 
 905 #define CC (char*)
 906 
 907 static JNINativeMethod methods[] = {
 908   {CC"getObjectAddress",   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
 909   {CC"getObjectSize",      CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
 910   {CC"isObjectInOldGen",   CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
 911   {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
 912   {CC"isClassAlive0",      CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
 913   {CC"parseCommandLine",
 914       CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
 915       (void*) &WB_ParseCommandLine
 916   },
 917   {CC"getCompressedOopsMaxHeapSize", CC"()J",
 918       (void*)&WB_GetCompressedOopsMaxHeapSize},
 919   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
 920   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
 921   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
 922   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
 923 #if INCLUDE_ALL_GCS
 924   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
 925   {CC"g1IsHumongous",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
 926   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
 927   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
 928 #endif // INCLUDE_ALL_GCS
 929 #if INCLUDE_NMT
 930   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
 931   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
 932   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
 933   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
 934   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
 935   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
 936   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
 937   {CC"NMTOverflowHashBucket", CC"(J)V",               (void*)&WB_NMTOverflowHashBucket},
 938   {CC"NMTIsDetailSupported",CC"()Z",                  (void*)&WB_NMTIsDetailSupported},
 939 #endif // INCLUDE_NMT
 940   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
 941   {CC"deoptimizeMethod",   CC"(Ljava/lang/reflect/Executable;Z)I",
 942                                                       (void*)&WB_DeoptimizeMethod  },
 943   {CC"isMethodCompiled",   CC"(Ljava/lang/reflect/Executable;Z)Z",
 944                                                       (void*)&WB_IsMethodCompiled  },
 945   {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
 946                                                       (void*)&WB_IsMethodCompilable},
 947   {CC"isMethodQueuedForCompilation",
 948       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
 949   {CC"makeMethodNotCompilable",
 950       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
 951   {CC"testSetDontInlineMethod",
 952       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
 953   {CC"getMethodCompilationLevel",
 954       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
 955   {CC"getMethodEntryBci",
 956       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
 957   {CC"getCompileQueueSize",
 958       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
 959   {CC"testSetForceInlineMethod",
 960       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
 961   {CC"enqueueMethodForCompilation",
 962       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
 963   {CC"clearMethodState",
 964       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
 965   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
 966   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
 967   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
 968   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
 969   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
 970   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
 971                                                       (void*)&WB_SetStringVMFlag},
 972   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
 973                                                       (void*)&WB_GetBooleanVMFlag},
 974   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
 975                                                       (void*)&WB_GetIntxVMFlag},
 976   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
 977                                                       (void*)&WB_GetUintxVMFlag},
 978   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
 979                                                       (void*)&WB_GetUint64VMFlag},
 980   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
 981                                                       (void*)&WB_GetDoubleVMFlag},
 982   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
 983                                                       (void*)&WB_GetStringVMFlag},
 984   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
 985   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
 986   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
 987   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
 988   {CC"allocateMetaspace",
 989      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
 990   {CC"freeMetaspace",
 991      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
 992   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
 993   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
 994   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
 995   {CC"getNMethod",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
 996                                                       (void*)&WB_GetNMethod         },
 997 };
 998 
 999 #undef CC
1000 
1001 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1002   {
1003     if (WhiteBoxAPI) {
1004       // Make sure that wbclass is loaded by the null classloader
1005       instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1006       Handle loader(ikh->class_loader());
1007       if (loader.is_null()) {
1008         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1009         WhiteBox::register_extended(env, wbclass, thread);
1010         WhiteBox::set_used();
1011       }
1012     }
1013   }
1014 JVM_END