1 /*
   2  * Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 
  27 #include <new>
  28 
  29 #include "classfile/classLoaderData.hpp"
  30 #include "classfile/modules.hpp"
  31 #include "classfile/stringTable.hpp"
  32 #include "code/codeCache.hpp"
  33 #include "compiler/methodMatcher.hpp"
  34 #include "compiler/directivesParser.hpp"
  35 #include "jvmtifiles/jvmtiEnv.hpp"
  36 #include "memory/metadataFactory.hpp"
  37 #include "memory/metaspaceShared.hpp"
  38 #include "memory/iterator.hpp"
  39 #include "memory/resourceArea.hpp"
  40 #include "memory/universe.hpp"
  41 #include "memory/oopFactory.hpp"
  42 #include "oops/constantPool.hpp"
  43 #include "oops/oop.inline.hpp"
  44 #include "prims/wbtestmethods/parserTests.hpp"
  45 #include "prims/whitebox.hpp"
  46 #include "runtime/arguments.hpp"
  47 #include "runtime/compilationPolicy.hpp"
  48 #include "runtime/deoptimization.hpp"
  49 #include "runtime/interfaceSupport.hpp"
  50 #include "runtime/javaCalls.hpp"
  51 #include "runtime/os.hpp"
  52 #include "runtime/sweeper.hpp"
  53 #include "runtime/thread.hpp"
  54 #include "runtime/vm_version.hpp"
  55 #include "utilities/array.hpp"
  56 #include "utilities/debug.hpp"
  57 #include "utilities/exceptions.hpp"
  58 #include "utilities/macros.hpp"
  59 #if INCLUDE_ALL_GCS
  60 #include "gc/g1/concurrentMarkThread.hpp"
  61 #include "gc/g1/g1CollectedHeap.inline.hpp"
  62 #include "gc/g1/g1ConcurrentMark.hpp"
  63 #include "gc/g1/heapRegionRemSet.hpp"
  64 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
  65 #include "gc/parallel/adjoiningGenerations.hpp"
  66 #endif // INCLUDE_ALL_GCS
  67 #if INCLUDE_NMT
  68 #include "services/mallocSiteTable.hpp"
  69 #include "services/memTracker.hpp"
  70 #include "utilities/nativeCallStack.hpp"
  71 #endif // INCLUDE_NMT
  72 
  73 
  74 #define SIZE_T_MAX_VALUE ((size_t) -1)
  75 
  76 bool WhiteBox::_used = false;
  77 volatile bool WhiteBox::compilation_locked = false;
  78 
  79 class VM_WhiteBoxOperation : public VM_Operation {
  80  public:
  81   VM_WhiteBoxOperation()                         { }
  82   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
  83   bool allow_nested_vm_operations() const        { return true; }
  84 };
  85 
  86 
  87 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  88   return (jlong)(void*)JNIHandles::resolve(obj);
  89 WB_END
  90 
  91 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  92   return heapOopSize;
  93 WB_END
  94 
  95 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
  96   return os::vm_page_size();
  97 WB_END
  98 
  99 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
 100   return os::vm_allocation_granularity();
 101 WB_END
 102 
 103 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
 104   return os::large_page_size();
 105 WB_END
 106 
 107 class WBIsKlassAliveClosure : public KlassClosure {
 108     Symbol* _name;
 109     bool _found;
 110 public:
 111     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
 112 
 113     void do_klass(Klass* k) {
 114       if (_found) return;
 115       Symbol* ksym = k->name();
 116       if (ksym->fast_compare(_name) == 0) {
 117         _found = true;
 118       }
 119     }
 120 
 121     bool found() const {
 122         return _found;
 123     }
 124 };
 125 
 126 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
 127   oop h_name = JNIHandles::resolve(name);
 128   if (h_name == NULL) return false;
 129   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
 130   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 131 
 132   WBIsKlassAliveClosure closure(sym);
 133   ClassLoaderDataGraph::classes_do(&closure);
 134 
 135   return closure.found();
 136 WB_END
 137 
 138 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 139 #if INCLUDE_JVMTI
 140   ResourceMark rm;
 141   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 142   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 143   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 144   assert(err == JVMTI_ERROR_NONE, "must not fail");
 145 #endif
 146 }
 147 WB_END
 148 
 149 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 150 #if INCLUDE_JVMTI
 151   ResourceMark rm;
 152   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 153   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 154   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 155   assert(err == JVMTI_ERROR_NONE, "must not fail");
 156 #endif
 157 }
 158 WB_END
 159 
 160 
 161 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 162   return (jlong)Arguments::max_heap_for_compressed_oops();
 163 }
 164 WB_END
 165 
 166 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 167   CollectorPolicy * p = Universe::heap()->collector_policy();
 168   tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
 169     SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
 170     p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
 171     p->space_alignment(), p->heap_alignment());
 172 }
 173 WB_END
 174 
 175 #ifndef PRODUCT
 176 // Forward declaration
 177 void TestReservedSpace_test();
 178 void TestReserveMemorySpecial_test();
 179 void TestVirtualSpace_test();
 180 void TestMetaspaceAux_test();
 181 #endif
 182 
 183 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 184 #ifndef PRODUCT
 185   TestReservedSpace_test();
 186   TestReserveMemorySpecial_test();
 187   TestVirtualSpace_test();
 188   TestMetaspaceAux_test();
 189 #endif
 190 WB_END
 191 
 192 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 193   size_t granularity = os::vm_allocation_granularity();
 194   ReservedHeapSpace rhs(100 * granularity, granularity, false);
 195   VirtualSpace vs;
 196   vs.initialize(rhs, 50 * granularity);
 197 
 198   // Check if constraints are complied
 199   if (!( UseCompressedOops && rhs.base() != NULL &&
 200          Universe::narrow_oop_base() != NULL &&
 201          Universe::narrow_oop_use_implicit_null_checks() )) {
 202     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 203                   "\tUseCompressedOops is %d\n"
 204                   "\trhs.base() is " PTR_FORMAT "\n"
 205                   "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
 206                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
 207                   UseCompressedOops,
 208                   p2i(rhs.base()),
 209                   p2i(Universe::narrow_oop_base()),
 210                   Universe::narrow_oop_use_implicit_null_checks());
 211     return;
 212   }
 213   tty->print_cr("Reading from no access area... ");
 214   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 215                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 216 WB_END
 217 
 218 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 219                                            size_t magnitude, size_t iterations) {
 220   size_t granularity = os::vm_allocation_granularity();
 221   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
 222   VirtualSpace vs;
 223   if (!vs.initialize(rhs, 0)) {
 224     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 225     return 3;
 226   }
 227 
 228   long seed = os::random();
 229   tty->print_cr("Random seed is %ld", seed);
 230   os::init_random(seed);
 231 
 232   for (size_t i = 0; i < iterations; i++) {
 233 
 234     // Whether we will shrink or grow
 235     bool shrink = os::random() % 2L == 0;
 236 
 237     // Get random delta to resize virtual space
 238     size_t delta = (size_t)os::random() % magnitude;
 239 
 240     // If we are about to shrink virtual space below zero, then expand instead
 241     if (shrink && vs.committed_size() < delta) {
 242       shrink = false;
 243     }
 244 
 245     // Resizing by delta
 246     if (shrink) {
 247       vs.shrink_by(delta);
 248     } else {
 249       // If expanding fails expand_by will silently return false
 250       vs.expand_by(delta, true);
 251     }
 252   }
 253   return 0;
 254 }
 255 
 256 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 257         jlong reserved_space_size, jlong magnitude, jlong iterations))
 258   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 259                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 260                 iterations);
 261   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 262     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 263     return 1;
 264   }
 265 
 266   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 267   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 268   if (sizeof(size_t) < sizeof(jlong)) {
 269     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 270     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 271         || iterations > size_t_max_value) {
 272       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 273       return 2;
 274     }
 275   }
 276 
 277   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 278                                         (size_t) magnitude, (size_t) iterations);
 279 WB_END
 280 
 281 static const jint serial_code   = 1;
 282 static const jint parallel_code = 2;
 283 static const jint cms_code      = 4;
 284 static const jint g1_code       = 8;
 285 
 286 WB_ENTRY(jint, WB_CurrentGC(JNIEnv* env, jobject o, jobject obj))
 287   if (UseSerialGC) {
 288     return serial_code;
 289   } else if (UseParallelGC || UseParallelOldGC) {
 290     return parallel_code;
 291   } if (UseConcMarkSweepGC) {
 292     return cms_code;
 293   } else if (UseG1GC) {
 294     return g1_code;
 295   }
 296   ShouldNotReachHere();
 297   return 0;
 298 WB_END
 299 
 300 WB_ENTRY(jint, WB_AllSupportedGC(JNIEnv* env, jobject o, jobject obj))
 301 #if INCLUDE_ALL_GCS
 302   return serial_code | parallel_code | cms_code | g1_code;
 303 #else
 304   return serial_code;
 305 #endif // INCLUDE_ALL_GCS
 306 WB_END
 307 
 308 WB_ENTRY(jboolean, WB_GCSelectedByErgo(JNIEnv* env, jobject o, jobject obj))
 309   if (UseSerialGC) {
 310     return FLAG_IS_ERGO(UseSerialGC);
 311   } else if (UseParallelGC) {
 312     return FLAG_IS_ERGO(UseParallelGC);
 313   } else if (UseParallelOldGC) {
 314     return FLAG_IS_ERGO(UseParallelOldGC);
 315   } else if (UseConcMarkSweepGC) {
 316     return FLAG_IS_ERGO(UseConcMarkSweepGC);
 317   } else if (UseG1GC) {
 318     return FLAG_IS_ERGO(UseG1GC);
 319   }
 320   ShouldNotReachHere();
 321   return false;
 322 WB_END
 323 
 324 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 325   oop p = JNIHandles::resolve(obj);
 326 #if INCLUDE_ALL_GCS
 327   if (UseG1GC) {
 328     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 329     const HeapRegion* hr = g1->heap_region_containing(p);
 330     if (hr == NULL) {
 331       return false;
 332     }
 333     return !(hr->is_young());
 334   } else if (UseParallelGC) {
 335     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 336     return !psh->is_in_young(p);
 337   }
 338 #endif // INCLUDE_ALL_GCS
 339   GenCollectedHeap* gch = GenCollectedHeap::heap();
 340   return !gch->is_in_young(p);
 341 WB_END
 342 
 343 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 344   oop p = JNIHandles::resolve(obj);
 345   return p->size() * HeapWordSize;
 346 WB_END
 347 
 348 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 349   size_t alignment = Universe::heap()->collector_policy()->space_alignment();
 350   return (jlong)alignment;
 351 WB_END
 352 
 353 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
 354   size_t alignment = Universe::heap()->collector_policy()->heap_alignment();
 355   return (jlong)alignment;
 356 WB_END
 357 
 358 #if INCLUDE_ALL_GCS
 359 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 360   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 361   oop result = JNIHandles::resolve(obj);
 362   const HeapRegion* hr = g1->heap_region_containing(result);
 363   return hr->is_humongous();
 364 WB_END
 365 
 366 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 367   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 368   const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 369   return hr->is_humongous();
 370 WB_END
 371 
 372 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 373   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 374   const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 375   return hr->is_free();
 376 WB_END
 377 
 378 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 379   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 380   size_t nr = g1->max_regions();
 381   return (jlong)nr;
 382 WB_END
 383 
 384 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 385   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 386   size_t nr = g1->num_free_regions();
 387   return (jlong)nr;
 388 WB_END
 389 
 390 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 391   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 392   return g1h->concurrent_mark()->cmThread()->during_cycle();
 393 WB_END
 394 
 395 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
 396   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 397   if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
 398     g1h->collect(GCCause::_wb_conc_mark);
 399     return true;
 400   }
 401   return false;
 402 WB_END
 403 
 404 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 405   return (jint)HeapRegion::GrainBytes;
 406 WB_END
 407 
 408 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
 409 #if INCLUDE_ALL_GCS
 410   if (UseParallelGC) {
 411     return ParallelScavengeHeap::heap()->gens()->virtual_spaces()->alignment();
 412   }
 413 #endif // INCLUDE_ALL_GCS
 414   THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
 415 WB_END
 416 
 417 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
 418 #if INCLUDE_ALL_GCS
 419   if (UseParallelGC) {
 420     return ParallelScavengeHeap::heap()->generation_alignment();
 421   }
 422 #endif // INCLUDE_ALL_GCS
 423   THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
 424 WB_END
 425 
 426 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 427   ResourceMark rm(THREAD);
 428   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 429   MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 430   Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 431   return JNIHandles::make_local(env, h());
 432 WB_END
 433 
 434 class OldRegionsLivenessClosure: public HeapRegionClosure {
 435 
 436  private:
 437   const int _liveness;
 438   size_t _total_count;
 439   size_t _total_memory;
 440   size_t _total_memory_to_free;
 441 
 442  public:
 443   OldRegionsLivenessClosure(int liveness) :
 444     _liveness(liveness),
 445     _total_count(0),
 446     _total_memory(0),
 447     _total_memory_to_free(0) { }
 448 
 449     size_t total_count() { return _total_count; }
 450     size_t total_memory() { return _total_memory; }
 451     size_t total_memory_to_free() { return _total_memory_to_free; }
 452 
 453   bool doHeapRegion(HeapRegion* r) {
 454     if (r->is_old()) {
 455       size_t prev_live = r->marked_bytes();
 456       size_t live = r->live_bytes();
 457       size_t size = r->used();
 458       size_t reg_size = HeapRegion::GrainBytes;
 459       if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
 460         _total_memory += size;
 461         ++_total_count;
 462         if (size == reg_size) {
 463         // we don't include non-full regions since they are unlikely included in mixed gc
 464         // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
 465           _total_memory_to_free += size - prev_live;
 466         }
 467       }
 468     }
 469     return false;
 470   }
 471 };
 472 
 473 
 474 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
 475   if (!UseG1GC) {
 476     THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "WB_G1GetMixedGCInfo: G1 is not enabled");
 477   }
 478   if (liveness < 0) {
 479     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
 480   }
 481 
 482   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 483   OldRegionsLivenessClosure rli(liveness);
 484   g1h->heap_region_iterate(&rli);
 485 
 486   typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
 487   result->long_at_put(0, rli.total_count());
 488   result->long_at_put(1, rli.total_memory());
 489   result->long_at_put(2, rli.total_memory_to_free());
 490   return (jlongArray) JNIHandles::make_local(env, result);
 491 WB_END
 492 
 493 
 494 
 495 #endif // INCLUDE_ALL_GCS
 496 
 497 #if INCLUDE_NMT
 498 // Alloc memory using the test memory type so that we can use that to see if
 499 // NMT picks it up correctly
 500 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 501   jlong addr = 0;
 502   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 503   return addr;
 504 WB_END
 505 
 506 // Alloc memory with pseudo call stack. The test can create psudo malloc
 507 // allocation site to stress the malloc tracking.
 508 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 509   address pc = (address)(size_t)pseudo_stack;
 510   NativeCallStack stack(&pc, 1);
 511   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 512 WB_END
 513 
 514 // Free the memory allocated by NMTAllocTest
 515 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 516   os::free((void*)(uintptr_t)mem);
 517 WB_END
 518 
 519 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 520   jlong addr = 0;
 521 
 522   addr = (jlong)(uintptr_t)os::reserve_memory(size);
 523   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 524 
 525   return addr;
 526 WB_END
 527 
 528 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 529   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 530   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 531 WB_END
 532 
 533 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 534   os::uncommit_memory((char *)(uintptr_t)addr, size);
 535 WB_END
 536 
 537 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 538   os::release_memory((char *)(uintptr_t)addr, size);
 539 WB_END
 540 
 541 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 542   // Test that we can downgrade NMT levels but not upgrade them.
 543   if (MemTracker::tracking_level() == NMT_off) {
 544     MemTracker::transition_to(NMT_off);
 545     return MemTracker::tracking_level() == NMT_off;
 546   } else {
 547     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 548     MemTracker::transition_to(NMT_summary);
 549     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 550 
 551     // Can't go to detail once NMT is set to summary.
 552     MemTracker::transition_to(NMT_detail);
 553     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 554 
 555     // Shutdown sets tracking level to minimal.
 556     MemTracker::shutdown();
 557     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 558 
 559     // Once the tracking level is minimal, we cannot increase to summary.
 560     // The code ignores this request instead of asserting because if the malloc site
 561     // table overflows in another thread, it tries to change the code to summary.
 562     MemTracker::transition_to(NMT_summary);
 563     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 564 
 565     // Really can never go up to detail, verify that the code would never do this.
 566     MemTracker::transition_to(NMT_detail);
 567     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 568     return MemTracker::tracking_level() == NMT_minimal;
 569   }
 570 WB_END
 571 
 572 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 573   int hash_size = MallocSiteTable::hash_buckets();
 574   assert(hash_size > 0, "NMT hash_size should be > 0");
 575   return (jint)hash_size;
 576 WB_END
 577 #endif // INCLUDE_NMT
 578 
 579 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 580   assert(method != NULL, "method should not be null");
 581   ThreadToNativeFromVM ttn(thread);
 582   return env->FromReflectedMethod(method);
 583 }
 584 
 585 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 586 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 587  private:
 588   int _result;
 589   const bool _make_not_entrant;
 590  public:
 591   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 592         _result(0), _make_not_entrant(make_not_entrant) { }
 593   int  result() const { return _result; }
 594 
 595   void doit() {
 596     for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
 597       if (t->has_last_Java_frame()) {
 598         for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
 599           frame* f = fst.current();
 600           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 601             RegisterMap* reg_map = fst.register_map();
 602             Deoptimization::deoptimize(t, *f, reg_map);
 603             if (_make_not_entrant) {
 604                 CompiledMethod* cm = CodeCache::find_compiled(f->pc());
 605                 assert(cm != NULL, "sanity check");
 606                 cm->make_not_entrant();
 607             }
 608             ++_result;
 609           }
 610         }
 611       }
 612     }
 613   }
 614 };
 615 
 616 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 617   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 618   VMThread::execute(&op);
 619   return op.result();
 620 WB_END
 621 
 622 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 623   MutexLockerEx mu(Compile_lock);
 624   CodeCache::mark_all_nmethods_for_deoptimization();
 625   VM_Deoptimize op;
 626   VMThread::execute(&op);
 627 WB_END
 628 
 629 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 630   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 631   int result = 0;
 632   CHECK_JNI_EXCEPTION_(env, result);
 633   MutexLockerEx mu(Compile_lock);
 634   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 635   if (is_osr) {
 636     result += mh->mark_osr_nmethods();
 637   } else if (mh->code() != NULL) {
 638     mh->code()->mark_for_deoptimization();
 639     ++result;
 640   }
 641   result += CodeCache::mark_for_deoptimization(mh());
 642   if (result > 0) {
 643     VM_Deoptimize op;
 644     VMThread::execute(&op);
 645   }
 646   return result;
 647 WB_END
 648 
 649 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 650   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 651   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 652   MutexLockerEx mu(Compile_lock);
 653   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 654   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 655   if (code == NULL) {
 656     return JNI_FALSE;
 657   }
 658   return (code->is_alive() && !code->is_marked_for_deoptimization());
 659 WB_END
 660 
 661 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 662   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 663   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 664   MutexLockerEx mu(Compile_lock);
 665   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 666   if (is_osr) {
 667     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 668   } else {
 669     return CompilationPolicy::can_be_compiled(mh, comp_level);
 670   }
 671 WB_END
 672 
 673 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 674   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 675   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 676   MutexLockerEx mu(Compile_lock);
 677   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 678   return mh->queued_for_compilation();
 679 WB_END
 680 
 681 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 682   if (compLevel < CompLevel_none || compLevel > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 683     return false; // Intrinsic is not available on a non-existent compilation level.
 684   }
 685   jmethodID method_id, compilation_context_id;
 686   method_id = reflected_method_to_jmid(thread, env, method);
 687   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 688   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 689 
 690   DirectiveSet* directive;
 691   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 692   assert(comp != NULL, "compiler not available");
 693   if (compilation_context != NULL) {
 694     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 695     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 696     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 697     directive = DirectivesStack::getMatchingDirective(cch, comp);
 698   } else {
 699     // Calling with NULL matches default directive
 700     directive = DirectivesStack::getDefaultDirective(comp);
 701   }
 702   bool result = comp->is_intrinsic_available(mh, directive);
 703   DirectivesStack::release(directive);
 704   return result;
 705 WB_END
 706 
 707 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 708   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 709   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 710   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 711   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 712   return (code != NULL ? code->comp_level() : CompLevel_none);
 713 WB_END
 714 
 715 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 716   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 717   CHECK_JNI_EXCEPTION(env);
 718   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 719   if (is_osr) {
 720     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 721   } else {
 722     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 723   }
 724 WB_END
 725 
 726 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 727   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 728   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 729   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 730   CompiledMethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 731   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 732 WB_END
 733 
 734 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 735   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 736   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 737   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 738   bool result = mh->dont_inline();
 739   mh->set_dont_inline(value == JNI_TRUE);
 740   return result;
 741 WB_END
 742 
 743 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 744   if (comp_level == CompLevel_any) {
 745     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 746         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 747   } else {
 748     return CompileBroker::queue_size(comp_level);
 749   }
 750 WB_END
 751 
 752 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 753   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 754   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 755   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 756   bool result = mh->force_inline();
 757   mh->set_force_inline(value == JNI_TRUE);
 758   return result;
 759 WB_END
 760 
 761 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
 762   // Screen for unavailable/bad comp level or null method
 763   if (method == NULL || comp_level > TieredStopAtLevel ||
 764       CompileBroker::compiler(comp_level) == NULL) {
 765     return false;
 766   }
 767   methodHandle mh(THREAD, method);
 768   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, THREAD);
 769   MutexLockerEx mu(Compile_lock);
 770   return (mh->queued_for_compilation() || nm != NULL);
 771 }
 772 
 773 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
 774   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 775   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 776   return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
 777 WB_END
 778 
 779 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
 780   instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
 781   return WhiteBox::compile_method(ikh->class_initializer(), comp_level, InvocationEntryBci, THREAD);
 782 WB_END
 783 
 784 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
 785   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 786   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 787 
 788   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 789   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
 790   bool result = directive->PrintAssemblyOption;
 791   DirectivesStack::release(directive);
 792 
 793   return result;
 794 WB_END
 795 
 796 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
 797   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 798   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 799 
 800   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 801 
 802   ResourceMark rm;
 803   const char* error_msg = NULL;
 804   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 805   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
 806 
 807   if (m == NULL) {
 808     assert(error_msg != NULL, "Always have an error message");
 809     tty->print_cr("Got error: %s", error_msg);
 810     return -1; // Pattern failed
 811   }
 812 
 813   // Pattern works - now check if it matches
 814   int result;
 815   if (m->match(mh, InlineMatcher::force_inline)) {
 816     result = 2; // Force inline match
 817   } else if (m->match(mh, InlineMatcher::dont_inline)) {
 818     result = 1; // Dont inline match
 819   } else {
 820     result = 0; // No match
 821   }
 822   delete m;
 823   return result;
 824 WB_END
 825 
 826 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
 827   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 828   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 829 
 830   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 831 
 832   ResourceMark rm;
 833   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 834 
 835   const char* error_msg = NULL;
 836 
 837   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
 838   if (m == NULL) {
 839     assert(error_msg != NULL, "Must have error_msg");
 840     tty->print_cr("Got error: %s", error_msg);
 841     return -1;
 842   }
 843 
 844   // Pattern works - now check if it matches
 845   int result = m->matches(mh);
 846   delete m;
 847   assert(result == 0 || result == 1, "Result out of range");
 848   return result;
 849 WB_END
 850 
 851 static AlwaysFalseClosure always_false;
 852 
 853 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
 854   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 855   CHECK_JNI_EXCEPTION(env);
 856   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 857   MutexLockerEx mu(Compile_lock);
 858   MethodData* mdo = mh->method_data();
 859   MethodCounters* mcs = mh->method_counters();
 860 
 861   if (mdo != NULL) {
 862     mdo->init();
 863     ResourceMark rm;
 864     int arg_count = mdo->method()->size_of_parameters();
 865     for (int i = 0; i < arg_count; i++) {
 866       mdo->set_arg_modified(i, 0);
 867     }
 868     MutexLockerEx mu(mdo->extra_data_lock());
 869     mdo->clean_method_data(&always_false);
 870   }
 871 
 872   mh->clear_not_c1_compilable();
 873   mh->clear_not_c2_compilable();
 874   mh->clear_not_c2_osr_compilable();
 875   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
 876   if (mcs != NULL) {
 877     mcs->backedge_counter()->init();
 878     mcs->invocation_counter()->init();
 879     mcs->set_interpreter_invocation_count(0);
 880     mcs->set_interpreter_throwout_count(0);
 881 
 882 #ifdef TIERED
 883     mcs->set_rate(0.0F);
 884     mh->set_prev_event_count(0);
 885     mh->set_prev_time(0);
 886 #endif
 887   }
 888 WB_END
 889 
 890 template <typename T>
 891 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
 892   if (name == NULL) {
 893     return false;
 894   }
 895   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 896   const char* flag_name = env->GetStringUTFChars(name, NULL);
 897   CHECK_JNI_EXCEPTION_(env, false);
 898   Flag::Error result = (*TAt)(flag_name, value, true, true);
 899   env->ReleaseStringUTFChars(name, flag_name);
 900   return (result == Flag::SUCCESS);
 901 }
 902 
 903 template <typename T>
 904 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
 905   if (name == NULL) {
 906     return false;
 907   }
 908   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 909   const char* flag_name = env->GetStringUTFChars(name, NULL);
 910   CHECK_JNI_EXCEPTION_(env, false);
 911   Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
 912   env->ReleaseStringUTFChars(name, flag_name);
 913   return (result == Flag::SUCCESS);
 914 }
 915 
 916 template <typename T>
 917 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
 918   ResourceMark rm(thread);
 919   jclass clazz = env->FindClass(name->as_C_string());
 920   CHECK_JNI_EXCEPTION_(env, NULL);
 921   jmethodID methodID = env->GetStaticMethodID(clazz,
 922         vmSymbols::valueOf_name()->as_C_string(),
 923         sig->as_C_string());
 924   CHECK_JNI_EXCEPTION_(env, NULL);
 925   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
 926   CHECK_JNI_EXCEPTION_(env, NULL);
 927   return result;
 928 }
 929 
 930 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
 931   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
 932 }
 933 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
 934   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
 935 }
 936 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
 937   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
 938 }
 939 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
 940   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
 941 }*/
 942 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
 943   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
 944 }
 945 
 946 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
 947   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 948   const char* flag_name = env->GetStringUTFChars(name, NULL);
 949   CHECK_JNI_EXCEPTION_(env, NULL);
 950   Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
 951   env->ReleaseStringUTFChars(name, flag_name);
 952   return result;
 953 }
 954 
 955 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
 956   Flag* flag = getVMFlag(thread, env, name);
 957   return (flag != NULL) && flag->is_constant_in_binary();
 958 WB_END
 959 
 960 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
 961   Flag* flag = getVMFlag(thread, env, name);
 962   return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
 963 WB_END
 964 
 965 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
 966   bool result;
 967   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
 968     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 969     return booleanBox(thread, env, result);
 970   }
 971   return NULL;
 972 WB_END
 973 
 974 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
 975   int result;
 976   if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
 977     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 978     return longBox(thread, env, result);
 979   }
 980   return NULL;
 981 WB_END
 982 
 983 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
 984   uint result;
 985   if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
 986     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 987     return longBox(thread, env, result);
 988   }
 989   return NULL;
 990 WB_END
 991 
 992 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
 993   intx result;
 994   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
 995     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 996     return longBox(thread, env, result);
 997   }
 998   return NULL;
 999 WB_END
1000 
1001 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1002   uintx result;
1003   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
1004     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1005     return longBox(thread, env, result);
1006   }
1007   return NULL;
1008 WB_END
1009 
1010 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1011   uint64_t result;
1012   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
1013     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1014     return longBox(thread, env, result);
1015   }
1016   return NULL;
1017 WB_END
1018 
1019 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1020   uintx result;
1021   if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
1022     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1023     return longBox(thread, env, result);
1024   }
1025   return NULL;
1026 WB_END
1027 
1028 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1029   double result;
1030   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
1031     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1032     return doubleBox(thread, env, result);
1033   }
1034   return NULL;
1035 WB_END
1036 
1037 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1038   ccstr ccstrResult;
1039   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
1040     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1041     jstring result = env->NewStringUTF(ccstrResult);
1042     CHECK_JNI_EXCEPTION_(env, NULL);
1043     return result;
1044   }
1045   return NULL;
1046 WB_END
1047 
1048 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1049   bool result = value == JNI_TRUE ? true : false;
1050   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
1051 WB_END
1052 
1053 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1054   int result = value;
1055   SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
1056 WB_END
1057 
1058 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1059   uint result = value;
1060   SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
1061 WB_END
1062 
1063 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1064   intx result = value;
1065   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
1066 WB_END
1067 
1068 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1069   uintx result = value;
1070   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
1071 WB_END
1072 
1073 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1074   uint64_t result = value;
1075   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
1076 WB_END
1077 
1078 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1079   size_t result = value;
1080   SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
1081 WB_END
1082 
1083 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1084   double result = value;
1085   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
1086 WB_END
1087 
1088 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1089   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1090   const char* ccstrValue;
1091   if (value == NULL) {
1092     ccstrValue = NULL;
1093   }
1094   else {
1095     ccstrValue = env->GetStringUTFChars(value, NULL);
1096     CHECK_JNI_EXCEPTION(env);
1097   }
1098   ccstr ccstrResult = ccstrValue;
1099   bool needFree;
1100   {
1101     ThreadInVMfromNative ttvfn(thread); // back to VM
1102     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
1103   }
1104   if (value != NULL) {
1105     env->ReleaseStringUTFChars(value, ccstrValue);
1106   }
1107   if (needFree) {
1108     FREE_C_HEAP_ARRAY(char, ccstrResult);
1109   }
1110 WB_END
1111 
1112 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1113   WhiteBox::compilation_locked = true;
1114 WB_END
1115 
1116 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1117   MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1118   WhiteBox::compilation_locked = false;
1119   mo.notify_all();
1120 WB_END
1121 
1122 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
1123   // Force a code cache sweep and block until it finished
1124   NMethodSweeper::force_sweep();
1125 WB_END
1126 
1127 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1128   ResourceMark rm(THREAD);
1129   int len;
1130   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1131   return (StringTable::lookup(name, len) != NULL);
1132 WB_END
1133 
1134 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1135   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
1136   Universe::heap()->collect(GCCause::_wb_full_gc);
1137 #if INCLUDE_ALL_GCS
1138   if (UseG1GC) {
1139     // Needs to be cleared explicitly for G1
1140     Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
1141   }
1142 #endif // INCLUDE_ALL_GCS
1143 WB_END
1144 
1145 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1146   Universe::heap()->collect(GCCause::_wb_young_gc);
1147 WB_END
1148 
1149 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1150   // static+volatile in order to force the read to happen
1151   // (not be eliminated by the compiler)
1152   static char c;
1153   static volatile char* p;
1154 
1155   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1156   if (p == NULL) {
1157     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1158   }
1159 
1160   c = *p;
1161 WB_END
1162 
1163 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1164   const char* features = VM_Version::features_string();
1165   ThreadToNativeFromVM ttn(thread);
1166   jstring features_string = env->NewStringUTF(features);
1167 
1168   CHECK_JNI_EXCEPTION_(env, NULL);
1169 
1170   return features_string;
1171 WB_END
1172 
1173 int WhiteBox::get_blob_type(const CodeBlob* code) {
1174   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1175   if (code->is_aot()) {
1176     return -1;
1177   }
1178   return CodeCache::get_code_heap(code)->code_blob_type();
1179 }
1180 
1181 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1182   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1183   return CodeCache::get_code_heap(blob_type);
1184 }
1185 
1186 struct CodeBlobStub {
1187   CodeBlobStub(const CodeBlob* blob) :
1188       name(os::strdup(blob->name())),
1189       size(blob->size()),
1190       blob_type(WhiteBox::get_blob_type(blob)),
1191       address((jlong) blob) { }
1192   ~CodeBlobStub() { os::free((void*) name); }
1193   const char* const name;
1194   const jint        size;
1195   const jint        blob_type;
1196   const jlong       address;
1197 };
1198 
1199 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1200   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1201   CHECK_JNI_EXCEPTION_(env, NULL);
1202   jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1203 
1204   jstring name = env->NewStringUTF(cb->name);
1205   CHECK_JNI_EXCEPTION_(env, NULL);
1206   env->SetObjectArrayElement(result, 0, name);
1207 
1208   jobject obj = integerBox(thread, env, cb->size);
1209   CHECK_JNI_EXCEPTION_(env, NULL);
1210   env->SetObjectArrayElement(result, 1, obj);
1211 
1212   obj = integerBox(thread, env, cb->blob_type);
1213   CHECK_JNI_EXCEPTION_(env, NULL);
1214   env->SetObjectArrayElement(result, 2, obj);
1215 
1216   obj = longBox(thread, env, cb->address);
1217   CHECK_JNI_EXCEPTION_(env, NULL);
1218   env->SetObjectArrayElement(result, 3, obj);
1219 
1220   return result;
1221 }
1222 
1223 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1224   ResourceMark rm(THREAD);
1225   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1226   CHECK_JNI_EXCEPTION_(env, NULL);
1227   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1228   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1229   jobjectArray result = NULL;
1230   if (code == NULL) {
1231     return result;
1232   }
1233   int comp_level = code->comp_level();
1234   int insts_size = comp_level == CompLevel_aot ? code->code_end() - code->code_begin() : code->insts_size();
1235 
1236   ThreadToNativeFromVM ttn(thread);
1237   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1238   CHECK_JNI_EXCEPTION_(env, NULL);
1239   result = env->NewObjectArray(5, clazz, NULL);
1240   if (result == NULL) {
1241     return result;
1242   }
1243 
1244   CodeBlobStub stub(code);
1245   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1246   CHECK_JNI_EXCEPTION_(env, NULL);
1247   env->SetObjectArrayElement(result, 0, codeBlob);
1248 
1249   jobject level = integerBox(thread, env, comp_level);
1250   CHECK_JNI_EXCEPTION_(env, NULL);
1251   env->SetObjectArrayElement(result, 1, level);
1252 
1253   jbyteArray insts = env->NewByteArray(insts_size);
1254   CHECK_JNI_EXCEPTION_(env, NULL);
1255   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1256   env->SetObjectArrayElement(result, 2, insts);
1257 
1258   jobject id = integerBox(thread, env, code->compile_id());
1259   CHECK_JNI_EXCEPTION_(env, NULL);
1260   env->SetObjectArrayElement(result, 3, id);
1261 
1262   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1263   CHECK_JNI_EXCEPTION_(env, NULL);
1264   env->SetObjectArrayElement(result, 4, entry_point);
1265 
1266   return result;
1267 WB_END
1268 
1269 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1270   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1271   BufferBlob* blob;
1272   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1273   if (full_size < size) {
1274     full_size += round_to(size - full_size, oopSize);
1275   }
1276   {
1277     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1278     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1279     ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1280   }
1281   // Track memory usage statistic after releasing CodeCache_lock
1282   MemoryService::track_code_cache_memory_usage();
1283   return blob;
1284 }
1285 
1286 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1287   if (size < 0) {
1288     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1289       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1290   }
1291   return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1292 WB_END
1293 
1294 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1295   if (addr == 0) {
1296     return;
1297   }
1298   BufferBlob::free((BufferBlob*) addr);
1299 WB_END
1300 
1301 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1302   ResourceMark rm;
1303   GrowableArray<CodeBlobStub*> blobs;
1304   {
1305     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1306     CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1307     if (heap == NULL) {
1308       return NULL;
1309     }
1310     for (CodeBlob* cb = (CodeBlob*) heap->first();
1311          cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1312       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1313       new (stub) CodeBlobStub(cb);
1314       blobs.append(stub);
1315     }
1316   }
1317   if (blobs.length() == 0) {
1318     return NULL;
1319   }
1320   ThreadToNativeFromVM ttn(thread);
1321   jobjectArray result = NULL;
1322   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1323   CHECK_JNI_EXCEPTION_(env, NULL);
1324   result = env->NewObjectArray(blobs.length(), clazz, NULL);
1325   CHECK_JNI_EXCEPTION_(env, NULL);
1326   if (result == NULL) {
1327     return result;
1328   }
1329   int i = 0;
1330   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1331        it != blobs.end(); ++it) {
1332     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1333     CHECK_JNI_EXCEPTION_(env, NULL);
1334     env->SetObjectArrayElement(result, i, obj);
1335     CHECK_JNI_EXCEPTION_(env, NULL);
1336     ++i;
1337   }
1338   return result;
1339 WB_END
1340 
1341 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1342   return CompileBroker::get_compilation_activity_mode();
1343 WB_END
1344 
1345 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1346   if (addr == 0) {
1347     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1348       "WB_GetCodeBlob: addr is null");
1349   }
1350   ThreadToNativeFromVM ttn(thread);
1351   CodeBlobStub stub((CodeBlob*) addr);
1352   return codeBlob2objectArray(thread, env, &stub);
1353 WB_END
1354 
1355 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1356   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1357   CHECK_JNI_EXCEPTION_(env, 0);
1358   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1359   return (jlong) mh->method_data();
1360 WB_END
1361 
1362 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1363   return (jlong) Thread::current()->stack_size();
1364 WB_END
1365 
1366 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1367   JavaThread* t = JavaThread::current();
1368   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1369 WB_END
1370 
1371 
1372 int WhiteBox::array_bytes_to_length(size_t bytes) {
1373   return Array<u1>::bytes_to_length(bytes);
1374 }
1375 
1376 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1377   if (size < 0) {
1378     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1379         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1380   }
1381 
1382   oop class_loader_oop = JNIHandles::resolve(class_loader);
1383   ClassLoaderData* cld = class_loader_oop != NULL
1384       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1385       : ClassLoaderData::the_null_class_loader_data();
1386 
1387   void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1388 
1389   return (jlong)(uintptr_t)metadata;
1390 WB_END
1391 
1392 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1393   oop class_loader_oop = JNIHandles::resolve(class_loader);
1394   ClassLoaderData* cld = class_loader_oop != NULL
1395       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1396       : ClassLoaderData::the_null_class_loader_data();
1397 
1398   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1399 WB_END
1400 
1401 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jstring version, jstring location,
1402                                 jobjectArray packages))
1403   Modules::define_module(module, version, location, packages, CHECK);
1404 WB_END
1405 
1406 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1407   Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1408 WB_END
1409 
1410 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1411   Modules::add_module_exports_to_all_unnamed(module, package, CHECK);
1412 WB_END
1413 
1414 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1415   Modules::add_module_exports(module, package, NULL, CHECK);
1416 WB_END
1417 
1418 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1419   Modules::add_reads_module(from_module, source_module, CHECK);
1420 WB_END
1421 
1422 WB_ENTRY(void, WB_AddModulePackage(JNIEnv* env, jobject o, jclass module, jstring package))
1423   Modules::add_module_package(module, package, CHECK);
1424 WB_END
1425 
1426 WB_ENTRY(jobject, WB_GetModuleByPackageName(JNIEnv* env, jobject o, jobject loader, jstring package))
1427   return Modules::get_module_by_package_name(loader, package, THREAD);
1428 WB_END
1429 
1430 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1431   if (inc < 0) {
1432     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1433         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1434   }
1435 
1436   jlong max_size_t = (jlong) ((size_t) -1);
1437   if (inc > max_size_t) {
1438     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1439         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1440   }
1441 
1442   size_t new_cap_until_GC = 0;
1443   size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1444   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1445   if (!success) {
1446     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1447                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1448                 "due to contention with another thread");
1449   }
1450   return (jlong) new_cap_until_GC;
1451 WB_END
1452 
1453 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1454   return (jlong) MetaspaceGC::capacity_until_GC();
1455 WB_END
1456 
1457 WB_ENTRY(jboolean, WB_MetaspaceShouldConcurrentCollect(JNIEnv* env, jobject wb))
1458   return MetaspaceGC::should_concurrent_collect();
1459 WB_END
1460 
1461 
1462 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1463   Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1464                                            Monitor::_safepoint_check_always :
1465                                            Monitor::_safepoint_check_never;
1466   MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1467                    attemptedNoSafepointValue == JNI_TRUE);
1468 WB_END
1469 
1470 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1471   oop obj_oop = JNIHandles::resolve(obj);
1472   return (jboolean) obj_oop->mark()->has_monitor();
1473 WB_END
1474 
1475 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1476   VM_ForceSafepoint force_safepoint_op;
1477   VMThread::execute(&force_safepoint_op);
1478 WB_END
1479 
1480 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1481   instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1482   return (jlong) ikh->constants();
1483 WB_END
1484 
1485 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1486   return ConstantPool::CPCACHE_INDEX_TAG;
1487 WB_END
1488 
1489 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1490   instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1491   ConstantPool* cp = ikh->constants();
1492   if (cp->cache() == NULL) {
1493       return -1;
1494   }
1495   return cp->cache()->length();
1496 WB_END
1497 
1498 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1499   instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1500   ConstantPool* cp = ikh->constants();
1501   if (cp->cache() == NULL) {
1502     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1503   }
1504   jint cpci = index;
1505   jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1506   if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1507     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1508   }
1509   jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1510   return cpi;
1511 WB_END
1512 
1513 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1514   return ConstantPool::encode_invokedynamic_index(index);
1515 WB_END
1516 
1517 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1518   VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1519   VMThread::execute(&clear_ics);
1520 WB_END
1521 
1522 template <typename T>
1523 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1524   assert(value != NULL, "sanity");
1525   if (method == NULL || name == NULL) {
1526     return false;
1527   }
1528   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1529   CHECK_JNI_EXCEPTION_(env, false);
1530   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1531   // can't be in VM when we call JNI
1532   ThreadToNativeFromVM ttnfv(thread);
1533   const char* flag_name = env->GetStringUTFChars(name, NULL);
1534   CHECK_JNI_EXCEPTION_(env, false);
1535   bool result =  CompilerOracle::has_option_value(mh, flag_name, *value);
1536   env->ReleaseStringUTFChars(name, flag_name);
1537   return result;
1538 }
1539 
1540 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1541   bool result;
1542   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1543     // can't be in VM when we call JNI
1544     ThreadToNativeFromVM ttnfv(thread);
1545     return booleanBox(thread, env, result);
1546   }
1547   return NULL;
1548 WB_END
1549 
1550 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1551   intx result;
1552   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1553     // can't be in VM when we call JNI
1554     ThreadToNativeFromVM ttnfv(thread);
1555     return longBox(thread, env, result);
1556   }
1557   return NULL;
1558 WB_END
1559 
1560 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1561   uintx result;
1562   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1563     // can't be in VM when we call JNI
1564     ThreadToNativeFromVM ttnfv(thread);
1565     return longBox(thread, env, result);
1566   }
1567   return NULL;
1568 WB_END
1569 
1570 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1571   double result;
1572   if (GetMethodOption <double> (thread, env, method, name, &result)) {
1573     // can't be in VM when we call JNI
1574     ThreadToNativeFromVM ttnfv(thread);
1575     return doubleBox(thread, env, result);
1576   }
1577   return NULL;
1578 WB_END
1579 
1580 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1581   ccstr ccstrResult;
1582   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1583     // can't be in VM when we call JNI
1584     ThreadToNativeFromVM ttnfv(thread);
1585     jstring result = env->NewStringUTF(ccstrResult);
1586     CHECK_JNI_EXCEPTION_(env, NULL);
1587     return result;
1588   }
1589   return NULL;
1590 WB_END
1591 
1592 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1593   oop obj_oop = JNIHandles::resolve(obj);
1594   return MetaspaceShared::is_in_shared_space((void*)obj_oop);
1595 WB_END
1596 
1597 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1598   return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1599 WB_END
1600 
1601 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1602   return StringTable::shared_string_ignored();
1603 WB_END
1604 
1605 //Some convenience methods to deal with objects from java
1606 int WhiteBox::offset_for_field(const char* field_name, oop object,
1607     Symbol* signature_symbol) {
1608   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1609   Thread* THREAD = Thread::current();
1610 
1611   //Get the class of our object
1612   Klass* arg_klass = object->klass();
1613   //Turn it into an instance-klass
1614   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1615 
1616   //Create symbols to look for in the class
1617   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1618       THREAD);
1619 
1620   //To be filled in with an offset of the field we're looking for
1621   fieldDescriptor fd;
1622 
1623   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1624   if (res == NULL) {
1625     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1626         name_symbol->as_C_string());
1627     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
1628   }
1629 
1630   //fetch the field at the offset we've found
1631   int dest_offset = fd.offset();
1632 
1633   return dest_offset;
1634 }
1635 
1636 
1637 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1638   int offset = offset_for_field(field_name, object,
1639       vmSymbols::string_signature());
1640   oop string = object->obj_field(offset);
1641   if (string == NULL) {
1642     return NULL;
1643   }
1644   const char* ret = java_lang_String::as_utf8_string(string);
1645   return ret;
1646 }
1647 
1648 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1649   int offset =
1650       offset_for_field(field_name, object, vmSymbols::bool_signature());
1651   bool ret = (object->bool_field(offset) == JNI_TRUE);
1652   return ret;
1653 }
1654 
1655 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1656   ResourceMark rm;
1657   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1658 
1659   //  one by one registration natives for exception catching
1660   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1661   CHECK_JNI_EXCEPTION(env);
1662   for (int i = 0, n = method_count; i < n; ++i) {
1663     // Skip dummy entries
1664     if (method_array[i].fnPtr == NULL) continue;
1665     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1666       jthrowable throwable_obj = env->ExceptionOccurred();
1667       if (throwable_obj != NULL) {
1668         env->ExceptionClear();
1669         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1670           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1671           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1672           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1673               method_array[i].name, method_array[i].signature);
1674         }
1675       } else {
1676         // Registration failed unexpectedly.
1677         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1678             method_array[i].name, method_array[i].signature);
1679         env->UnregisterNatives(wbclass);
1680         break;
1681       }
1682     }
1683   }
1684 }
1685 
1686 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
1687   // can't be in VM when we call JNI
1688   ThreadToNativeFromVM ttnfv(thread);
1689   const char* dir = env->GetStringUTFChars(compDirect, NULL);
1690   CHECK_JNI_EXCEPTION_(env, 0);
1691   int ret;
1692   {
1693     ThreadInVMfromNative ttvfn(thread); // back to VM
1694     ret = DirectivesParser::parse_string(dir, tty);
1695   }
1696   env->ReleaseStringUTFChars(compDirect, dir);
1697   // -1 for error parsing directive. Return 0 as number of directives added.
1698   if (ret == -1) {
1699     ret = 0;
1700   }
1701   return (jint) ret;
1702 WB_END
1703 
1704 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
1705   DirectivesStack::pop(count);
1706 WB_END
1707 
1708 #define CC (char*)
1709 
1710 static JNINativeMethod methods[] = {
1711   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
1712   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
1713   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
1714   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
1715   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
1716   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
1717   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
1718   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
1719   {CC"getHeapAlignment",                 CC"()J",                   (void*)&WB_GetHeapAlignment},
1720   {CC"isClassAlive0",                    CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
1721   {CC"parseCommandLine0",
1722       CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1723       (void*) &WB_ParseCommandLine
1724   },
1725   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1726                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
1727   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
1728                                                       (void*)&WB_AddToSystemClassLoaderSearch},
1729   {CC"getCompressedOopsMaxHeapSize", CC"()J",
1730       (void*)&WB_GetCompressedOopsMaxHeapSize},
1731   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
1732   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
1733   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
1734   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
1735 #if INCLUDE_ALL_GCS
1736   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
1737   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
1738   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
1739   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
1740   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
1741   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
1742   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
1743   {CC"g1StartConcMarkCycle",       CC"()Z",           (void*)&WB_G1StartMarkCycle  },
1744   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1745                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
1746   {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
1747   {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
1748   {CC"g1GetMixedGCInfo",   CC"(I)[J",                 (void*)&WB_G1GetMixedGCInfo },
1749 #endif // INCLUDE_ALL_GCS
1750 #if INCLUDE_NMT
1751   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
1752   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
1753   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
1754   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
1755   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
1756   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
1757   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
1758   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
1759   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
1760 #endif // INCLUDE_NMT
1761   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
1762   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
1763   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
1764                                                       (void*)&WB_DeoptimizeMethod  },
1765   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
1766                                                       (void*)&WB_IsMethodCompiled  },
1767   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1768                                                       (void*)&WB_IsMethodCompilable},
1769   {CC"isMethodQueuedForCompilation0",
1770       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
1771   {CC"isIntrinsicAvailable0",
1772       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1773                                                       (void*)&WB_IsIntrinsicAvailable},
1774   {CC"makeMethodNotCompilable0",
1775       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
1776   {CC"testSetDontInlineMethod0",
1777       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
1778   {CC"getMethodCompilationLevel0",
1779       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
1780   {CC"getMethodEntryBci0",
1781       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
1782   {CC"getCompileQueueSize",
1783       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
1784   {CC"testSetForceInlineMethod0",
1785       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
1786   {CC"enqueueMethodForCompilation0",
1787       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
1788   {CC"enqueueInitializerForCompilation0",
1789       CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
1790   {CC"clearMethodState0",
1791       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
1792   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
1793   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
1794   {CC"matchesMethod",
1795       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1796                                                       (void*)&WB_MatchesMethod},
1797   {CC"matchesInline",
1798       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1799                                                       (void*)&WB_MatchesInline},
1800   {CC"shouldPrintAssembly",
1801         CC"(Ljava/lang/reflect/Executable;I)Z",
1802                                                         (void*)&WB_ShouldPrintAssembly},
1803 
1804   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1805   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1806   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1807   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1808   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1809   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1810   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1811   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1812   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1813   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1814   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
1815                                                       (void*)&WB_SetStringVMFlag},
1816   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1817                                                       (void*)&WB_GetBooleanVMFlag},
1818   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
1819                                                       (void*)&WB_GetIntVMFlag},
1820   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1821                                                       (void*)&WB_GetUintVMFlag},
1822   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1823                                                       (void*)&WB_GetIntxVMFlag},
1824   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1825                                                       (void*)&WB_GetUintxVMFlag},
1826   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
1827                                                       (void*)&WB_GetUint64VMFlag},
1828   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1829                                                       (void*)&WB_GetSizeTVMFlag},
1830   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
1831                                                       (void*)&WB_GetDoubleVMFlag},
1832   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
1833                                                       (void*)&WB_GetStringVMFlag},
1834   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
1835   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
1836   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
1837   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
1838   {CC"allocateMetaspace",
1839      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
1840   {CC"freeMetaspace",
1841      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
1842   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
1843   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
1844   {CC"metaspaceShouldConcurrentCollect", CC"()Z",     (void*)&WB_MetaspaceShouldConcurrentCollect },
1845   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
1846   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1847                                                       (void*)&WB_GetNMethod         },
1848   {CC"forceNMethodSweep",  CC"()V",                   (void*)&WB_ForceNMethodSweep  },
1849   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
1850   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
1851   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1852   {CC"getCompilationActivityMode",
1853                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
1854   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
1855                                                       (void*)&WB_GetMethodData      },
1856   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
1857   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
1858   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
1859   {CC"DefineModule",       CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
1860                                                       (void*)&WB_DefineModule },
1861   {CC"AddModuleExports",   CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
1862                                                       (void*)&WB_AddModuleExports },
1863   {CC"AddReadsModule",     CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
1864                                                       (void*)&WB_AddReadsModule },
1865   {CC"AddModulePackage",   CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1866                                                       (void*)&WB_AddModulePackage },
1867   {CC"GetModuleByPackageName", CC"(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;",
1868                                                       (void*)&WB_GetModuleByPackageName },
1869   {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1870                                                       (void*)&WB_AddModuleExportsToAllUnnamed },
1871   {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1872                                                       (void*)&WB_AddModuleExportsToAll },
1873   {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
1874   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
1875   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
1876   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
1877   {CC"getConstantPoolCacheIndexTag0", CC"()I",  (void*)&WB_GetConstantPoolCacheIndexTag},
1878   {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_GetConstantPoolCacheLength},
1879   {CC"remapInstructionOperandFromCPCache0",
1880       CC"(Ljava/lang/Class;I)I",                      (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
1881   {CC"encodeConstantPoolIndyIndex0",
1882       CC"(I)I",                      (void*)&WB_ConstantPoolEncodeIndyIndex},
1883   {CC"getMethodBooleanOption",
1884       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1885                                                       (void*)&WB_GetMethodBooleaneOption},
1886   {CC"getMethodIntxOption",
1887       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1888                                                       (void*)&WB_GetMethodIntxOption},
1889   {CC"getMethodUintxOption",
1890       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1891                                                       (void*)&WB_GetMethodUintxOption},
1892   {CC"getMethodDoubleOption",
1893       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1894                                                       (void*)&WB_GetMethodDoubleOption},
1895   {CC"getMethodStringOption",
1896       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1897                                                       (void*)&WB_GetMethodStringOption},
1898   {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
1899   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
1900   {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
1901   {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
1902   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
1903                                                       (void*)&WB_AddCompilerDirective },
1904   {CC"removeCompilerDirective",   CC"(I)V",             (void*)&WB_RemoveCompilerDirective },
1905   {CC"currentGC",                 CC"()I",            (void*)&WB_CurrentGC},
1906   {CC"allSupportedGC",            CC"()I",            (void*)&WB_AllSupportedGC},
1907   {CC"gcSelectedByErgo",          CC"()Z",            (void*)&WB_GCSelectedByErgo},
1908 };
1909 
1910 #undef CC
1911 
1912 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1913   {
1914     if (WhiteBoxAPI) {
1915       // Make sure that wbclass is loaded by the null classloader
1916       instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1917       Handle loader(THREAD, ikh->class_loader());
1918       if (loader.is_null()) {
1919         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1920         WhiteBox::register_extended(env, wbclass, thread);
1921         WhiteBox::set_used();
1922       }
1923     }
1924   }
1925 JVM_END