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/objArrayKlass.hpp"
  44 #include "oops/objArrayOop.inline.hpp"
  45 #include "oops/oop.inline.hpp"
  46 #include "prims/wbtestmethods/parserTests.hpp"
  47 #include "prims/whitebox.hpp"
  48 #include "runtime/arguments.hpp"
  49 #include "runtime/compilationPolicy.hpp"
  50 #include "runtime/deoptimization.hpp"
  51 #include "runtime/interfaceSupport.hpp"
  52 #include "runtime/javaCalls.hpp"
  53 #include "runtime/os.hpp"
  54 #include "runtime/sweeper.hpp"
  55 #include "runtime/thread.hpp"
  56 #include "runtime/vm_version.hpp"
  57 #include "utilities/array.hpp"
  58 #include "utilities/debug.hpp"
  59 #include "utilities/exceptions.hpp"
  60 #include "utilities/macros.hpp"
  61 #if INCLUDE_ALL_GCS
  62 #include "gc/g1/concurrentMarkThread.hpp"
  63 #include "gc/g1/g1CollectedHeap.inline.hpp"
  64 #include "gc/g1/g1ConcurrentMark.hpp"
  65 #include "gc/g1/heapRegionRemSet.hpp"
  66 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
  67 #include "gc/parallel/adjoiningGenerations.hpp"
  68 #endif // INCLUDE_ALL_GCS
  69 #if INCLUDE_NMT
  70 #include "services/mallocSiteTable.hpp"
  71 #include "services/memTracker.hpp"
  72 #include "utilities/nativeCallStack.hpp"
  73 #endif // INCLUDE_NMT
  74 
  75 
  76 #define SIZE_T_MAX_VALUE ((size_t) -1)
  77 
  78 bool WhiteBox::_used = false;
  79 volatile bool WhiteBox::compilation_locked = false;
  80 
  81 class VM_WhiteBoxOperation : public VM_Operation {
  82  public:
  83   VM_WhiteBoxOperation()                         { }
  84   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
  85   bool allow_nested_vm_operations() const        { return true; }
  86 };
  87 
  88 
  89 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  90   return (jlong)(void*)JNIHandles::resolve(obj);
  91 WB_END
  92 
  93 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  94   return heapOopSize;
  95 WB_END
  96 
  97 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
  98   return os::vm_page_size();
  99 WB_END
 100 
 101 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
 102   return os::vm_allocation_granularity();
 103 WB_END
 104 
 105 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
 106   return os::large_page_size();
 107 WB_END
 108 
 109 class WBIsKlassAliveClosure : public KlassClosure {
 110     Symbol* _name;
 111     bool _found;
 112 public:
 113     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
 114 
 115     void do_klass(Klass* k) {
 116       if (_found) return;
 117       Symbol* ksym = k->name();
 118       if (ksym->fast_compare(_name) == 0) {
 119         _found = true;
 120       }
 121     }
 122 
 123     bool found() const {
 124         return _found;
 125     }
 126 };
 127 
 128 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
 129   oop h_name = JNIHandles::resolve(name);
 130   if (h_name == NULL) return false;
 131   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
 132   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 133 
 134   WBIsKlassAliveClosure closure(sym);
 135   ClassLoaderDataGraph::classes_do(&closure);
 136 
 137   return closure.found();
 138 WB_END
 139 
 140 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 141 #if INCLUDE_JVMTI
 142   ResourceMark rm;
 143   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 144   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 145   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 146   assert(err == JVMTI_ERROR_NONE, "must not fail");
 147 #endif
 148 }
 149 WB_END
 150 
 151 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 152 #if INCLUDE_JVMTI
 153   ResourceMark rm;
 154   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 155   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 156   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 157   assert(err == JVMTI_ERROR_NONE, "must not fail");
 158 #endif
 159 }
 160 WB_END
 161 
 162 
 163 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 164   return (jlong)Arguments::max_heap_for_compressed_oops();
 165 }
 166 WB_END
 167 
 168 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 169   CollectorPolicy * p = Universe::heap()->collector_policy();
 170   tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
 171     SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
 172     p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
 173     p->space_alignment(), p->heap_alignment());
 174 }
 175 WB_END
 176 
 177 #ifndef PRODUCT
 178 // Forward declaration
 179 void TestReservedSpace_test();
 180 void TestReserveMemorySpecial_test();
 181 void TestVirtualSpace_test();
 182 void TestMetaspaceAux_test();
 183 #endif
 184 
 185 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 186 #ifndef PRODUCT
 187   TestReservedSpace_test();
 188   TestReserveMemorySpecial_test();
 189   TestVirtualSpace_test();
 190   TestMetaspaceAux_test();
 191 #endif
 192 WB_END
 193 
 194 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 195   size_t granularity = os::vm_allocation_granularity();
 196   ReservedHeapSpace rhs(100 * granularity, granularity, false);
 197   VirtualSpace vs;
 198   vs.initialize(rhs, 50 * granularity);
 199 
 200   // Check if constraints are complied
 201   if (!( UseCompressedOops && rhs.base() != NULL &&
 202          Universe::narrow_oop_base() != NULL &&
 203          Universe::narrow_oop_use_implicit_null_checks() )) {
 204     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 205                   "\tUseCompressedOops is %d\n"
 206                   "\trhs.base() is " PTR_FORMAT "\n"
 207                   "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
 208                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
 209                   UseCompressedOops,
 210                   p2i(rhs.base()),
 211                   p2i(Universe::narrow_oop_base()),
 212                   Universe::narrow_oop_use_implicit_null_checks());
 213     return;
 214   }
 215   tty->print_cr("Reading from no access area... ");
 216   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 217                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 218 WB_END
 219 
 220 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 221                                            size_t magnitude, size_t iterations) {
 222   size_t granularity = os::vm_allocation_granularity();
 223   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
 224   VirtualSpace vs;
 225   if (!vs.initialize(rhs, 0)) {
 226     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 227     return 3;
 228   }
 229 
 230   long seed = os::random();
 231   tty->print_cr("Random seed is %ld", seed);
 232   os::init_random(seed);
 233 
 234   for (size_t i = 0; i < iterations; i++) {
 235 
 236     // Whether we will shrink or grow
 237     bool shrink = os::random() % 2L == 0;
 238 
 239     // Get random delta to resize virtual space
 240     size_t delta = (size_t)os::random() % magnitude;
 241 
 242     // If we are about to shrink virtual space below zero, then expand instead
 243     if (shrink && vs.committed_size() < delta) {
 244       shrink = false;
 245     }
 246 
 247     // Resizing by delta
 248     if (shrink) {
 249       vs.shrink_by(delta);
 250     } else {
 251       // If expanding fails expand_by will silently return false
 252       vs.expand_by(delta, true);
 253     }
 254   }
 255   return 0;
 256 }
 257 
 258 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 259         jlong reserved_space_size, jlong magnitude, jlong iterations))
 260   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 261                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 262                 iterations);
 263   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 264     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 265     return 1;
 266   }
 267 
 268   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 269   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 270   if (sizeof(size_t) < sizeof(jlong)) {
 271     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 272     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 273         || iterations > size_t_max_value) {
 274       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 275       return 2;
 276     }
 277   }
 278 
 279   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 280                                         (size_t) magnitude, (size_t) iterations);
 281 WB_END
 282 
 283 static const jint serial_code   = 1;
 284 static const jint parallel_code = 2;
 285 static const jint cms_code      = 4;
 286 static const jint g1_code       = 8;
 287 
 288 WB_ENTRY(jint, WB_CurrentGC(JNIEnv* env, jobject o, jobject obj))
 289   if (UseSerialGC) {
 290     return serial_code;
 291   } else if (UseParallelGC || UseParallelOldGC) {
 292     return parallel_code;
 293   } if (UseConcMarkSweepGC) {
 294     return cms_code;
 295   } else if (UseG1GC) {
 296     return g1_code;
 297   }
 298   ShouldNotReachHere();
 299   return 0;
 300 WB_END
 301 
 302 WB_ENTRY(jint, WB_AllSupportedGC(JNIEnv* env, jobject o, jobject obj))
 303 #if INCLUDE_ALL_GCS
 304   return serial_code | parallel_code | cms_code | g1_code;
 305 #else
 306   return serial_code;
 307 #endif // INCLUDE_ALL_GCS
 308 WB_END
 309 
 310 WB_ENTRY(jboolean, WB_GCSelectedByErgo(JNIEnv* env, jobject o, jobject obj))
 311   if (UseSerialGC) {
 312     return FLAG_IS_ERGO(UseSerialGC);
 313   } else if (UseParallelGC) {
 314     return FLAG_IS_ERGO(UseParallelGC);
 315   } else if (UseParallelOldGC) {
 316     return FLAG_IS_ERGO(UseParallelOldGC);
 317   } else if (UseConcMarkSweepGC) {
 318     return FLAG_IS_ERGO(UseConcMarkSweepGC);
 319   } else if (UseG1GC) {
 320     return FLAG_IS_ERGO(UseG1GC);
 321   }
 322   ShouldNotReachHere();
 323   return false;
 324 WB_END
 325 
 326 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 327   oop p = JNIHandles::resolve(obj);
 328 #if INCLUDE_ALL_GCS
 329   if (UseG1GC) {
 330     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 331     const HeapRegion* hr = g1->heap_region_containing(p);
 332     if (hr == NULL) {
 333       return false;
 334     }
 335     return !(hr->is_young());
 336   } else if (UseParallelGC) {
 337     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 338     return !psh->is_in_young(p);
 339   }
 340 #endif // INCLUDE_ALL_GCS
 341   GenCollectedHeap* gch = GenCollectedHeap::heap();
 342   return !gch->is_in_young(p);
 343 WB_END
 344 
 345 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 346   oop p = JNIHandles::resolve(obj);
 347   return p->size() * HeapWordSize;
 348 WB_END
 349 
 350 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 351   size_t alignment = Universe::heap()->collector_policy()->space_alignment();
 352   return (jlong)alignment;
 353 WB_END
 354 
 355 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
 356   size_t alignment = Universe::heap()->collector_policy()->heap_alignment();
 357   return (jlong)alignment;
 358 WB_END
 359 
 360 #if INCLUDE_ALL_GCS
 361 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 362   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 363   oop result = JNIHandles::resolve(obj);
 364   const HeapRegion* hr = g1->heap_region_containing(result);
 365   return hr->is_humongous();
 366 WB_END
 367 
 368 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 369   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 370   const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 371   return hr->is_humongous();
 372 WB_END
 373 
 374 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 375   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 376   const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 377   return hr->is_free();
 378 WB_END
 379 
 380 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 381   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 382   size_t nr = g1->max_regions();
 383   return (jlong)nr;
 384 WB_END
 385 
 386 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 387   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 388   size_t nr = g1->num_free_regions();
 389   return (jlong)nr;
 390 WB_END
 391 
 392 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 393   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 394   return g1h->concurrent_mark()->cmThread()->during_cycle();
 395 WB_END
 396 
 397 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
 398   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 399   if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
 400     g1h->collect(GCCause::_wb_conc_mark);
 401     return true;
 402   }
 403   return false;
 404 WB_END
 405 
 406 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 407   return (jint)HeapRegion::GrainBytes;
 408 WB_END
 409 
 410 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
 411 #if INCLUDE_ALL_GCS
 412   if (UseParallelGC) {
 413     return ParallelScavengeHeap::heap()->gens()->virtual_spaces()->alignment();
 414   }
 415 #endif // INCLUDE_ALL_GCS
 416   THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
 417 WB_END
 418 
 419 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
 420 #if INCLUDE_ALL_GCS
 421   if (UseParallelGC) {
 422     return ParallelScavengeHeap::heap()->generation_alignment();
 423   }
 424 #endif // INCLUDE_ALL_GCS
 425   THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
 426 WB_END
 427 
 428 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 429   ResourceMark rm(THREAD);
 430   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 431   MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 432   Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 433   return JNIHandles::make_local(env, h());
 434 WB_END
 435 
 436 class OldRegionsLivenessClosure: public HeapRegionClosure {
 437 
 438  private:
 439   const int _liveness;
 440   size_t _total_count;
 441   size_t _total_memory;
 442   size_t _total_memory_to_free;
 443 
 444  public:
 445   OldRegionsLivenessClosure(int liveness) :
 446     _liveness(liveness),
 447     _total_count(0),
 448     _total_memory(0),
 449     _total_memory_to_free(0) { }
 450 
 451     size_t total_count() { return _total_count; }
 452     size_t total_memory() { return _total_memory; }
 453     size_t total_memory_to_free() { return _total_memory_to_free; }
 454 
 455   bool doHeapRegion(HeapRegion* r) {
 456     if (r->is_old()) {
 457       size_t prev_live = r->marked_bytes();
 458       size_t live = r->live_bytes();
 459       size_t size = r->used();
 460       size_t reg_size = HeapRegion::GrainBytes;
 461       if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
 462         _total_memory += size;
 463         ++_total_count;
 464         if (size == reg_size) {
 465         // we don't include non-full regions since they are unlikely included in mixed gc
 466         // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
 467           _total_memory_to_free += size - prev_live;
 468         }
 469       }
 470     }
 471     return false;
 472   }
 473 };
 474 
 475 
 476 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
 477   if (!UseG1GC) {
 478     THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "WB_G1GetMixedGCInfo: G1 is not enabled");
 479   }
 480   if (liveness < 0) {
 481     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
 482   }
 483 
 484   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 485   OldRegionsLivenessClosure rli(liveness);
 486   g1h->heap_region_iterate(&rli);
 487 
 488   typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
 489   result->long_at_put(0, rli.total_count());
 490   result->long_at_put(1, rli.total_memory());
 491   result->long_at_put(2, rli.total_memory_to_free());
 492   return (jlongArray) JNIHandles::make_local(env, result);
 493 WB_END
 494 
 495 
 496 
 497 #endif // INCLUDE_ALL_GCS
 498 
 499 #if INCLUDE_NMT
 500 // Alloc memory using the test memory type so that we can use that to see if
 501 // NMT picks it up correctly
 502 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 503   jlong addr = 0;
 504   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 505   return addr;
 506 WB_END
 507 
 508 // Alloc memory with pseudo call stack. The test can create psudo malloc
 509 // allocation site to stress the malloc tracking.
 510 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 511   address pc = (address)(size_t)pseudo_stack;
 512   NativeCallStack stack(&pc, 1);
 513   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 514 WB_END
 515 
 516 // Free the memory allocated by NMTAllocTest
 517 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 518   os::free((void*)(uintptr_t)mem);
 519 WB_END
 520 
 521 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 522   jlong addr = 0;
 523 
 524   addr = (jlong)(uintptr_t)os::reserve_memory(size);
 525   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 526 
 527   return addr;
 528 WB_END
 529 
 530 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 531   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 532   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 533 WB_END
 534 
 535 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 536   os::uncommit_memory((char *)(uintptr_t)addr, size);
 537 WB_END
 538 
 539 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 540   os::release_memory((char *)(uintptr_t)addr, size);
 541 WB_END
 542 
 543 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 544   // Test that we can downgrade NMT levels but not upgrade them.
 545   if (MemTracker::tracking_level() == NMT_off) {
 546     MemTracker::transition_to(NMT_off);
 547     return MemTracker::tracking_level() == NMT_off;
 548   } else {
 549     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 550     MemTracker::transition_to(NMT_summary);
 551     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 552 
 553     // Can't go to detail once NMT is set to summary.
 554     MemTracker::transition_to(NMT_detail);
 555     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 556 
 557     // Shutdown sets tracking level to minimal.
 558     MemTracker::shutdown();
 559     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 560 
 561     // Once the tracking level is minimal, we cannot increase to summary.
 562     // The code ignores this request instead of asserting because if the malloc site
 563     // table overflows in another thread, it tries to change the code to summary.
 564     MemTracker::transition_to(NMT_summary);
 565     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 566 
 567     // Really can never go up to detail, verify that the code would never do this.
 568     MemTracker::transition_to(NMT_detail);
 569     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 570     return MemTracker::tracking_level() == NMT_minimal;
 571   }
 572 WB_END
 573 
 574 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 575   int hash_size = MallocSiteTable::hash_buckets();
 576   assert(hash_size > 0, "NMT hash_size should be > 0");
 577   return (jint)hash_size;
 578 WB_END
 579 #endif // INCLUDE_NMT
 580 
 581 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 582   assert(method != NULL, "method should not be null");
 583   ThreadToNativeFromVM ttn(thread);
 584   return env->FromReflectedMethod(method);
 585 }
 586 
 587 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 588 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 589  private:
 590   int _result;
 591   const bool _make_not_entrant;
 592  public:
 593   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 594         _result(0), _make_not_entrant(make_not_entrant) { }
 595   int  result() const { return _result; }
 596 
 597   void doit() {
 598     for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
 599       if (t->has_last_Java_frame()) {
 600         for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
 601           frame* f = fst.current();
 602           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 603             RegisterMap* reg_map = fst.register_map();
 604             Deoptimization::deoptimize(t, *f, reg_map);
 605             if (_make_not_entrant) {
 606                 CompiledMethod* cm = CodeCache::find_compiled(f->pc());
 607                 assert(cm != NULL, "sanity check");
 608                 cm->make_not_entrant();
 609             }
 610             ++_result;
 611           }
 612         }
 613       }
 614     }
 615   }
 616 };
 617 
 618 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 619   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 620   VMThread::execute(&op);
 621   return op.result();
 622 WB_END
 623 
 624 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 625   MutexLockerEx mu(Compile_lock);
 626   CodeCache::mark_all_nmethods_for_deoptimization();
 627   VM_Deoptimize op;
 628   VMThread::execute(&op);
 629 WB_END
 630 
 631 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 632   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 633   int result = 0;
 634   CHECK_JNI_EXCEPTION_(env, result);
 635   MutexLockerEx mu(Compile_lock);
 636   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 637   if (is_osr) {
 638     result += mh->mark_osr_nmethods();
 639   } else if (mh->code() != NULL) {
 640     mh->code()->mark_for_deoptimization();
 641     ++result;
 642   }
 643   result += CodeCache::mark_for_deoptimization(mh());
 644   if (result > 0) {
 645     VM_Deoptimize op;
 646     VMThread::execute(&op);
 647   }
 648   return result;
 649 WB_END
 650 
 651 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 652   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 653   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 654   MutexLockerEx mu(Compile_lock);
 655   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 656   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 657   if (code == NULL) {
 658     return JNI_FALSE;
 659   }
 660   return (code->is_alive() && !code->is_marked_for_deoptimization());
 661 WB_END
 662 
 663 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 664   if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 665     return false;
 666   }
 667   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 668   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 669   MutexLockerEx mu(Compile_lock);
 670   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 671   if (is_osr) {
 672     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 673   } else {
 674     return CompilationPolicy::can_be_compiled(mh, comp_level);
 675   }
 676 WB_END
 677 
 678 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 679   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 680   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 681   MutexLockerEx mu(Compile_lock);
 682   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 683   return mh->queued_for_compilation();
 684 WB_END
 685 
 686 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 687   if (compLevel < CompLevel_none || compLevel > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 688     return false; // Intrinsic is not available on a non-existent compilation level.
 689   }
 690   jmethodID method_id, compilation_context_id;
 691   method_id = reflected_method_to_jmid(thread, env, method);
 692   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 693   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 694 
 695   DirectiveSet* directive;
 696   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 697   assert(comp != NULL, "compiler not available");
 698   if (compilation_context != NULL) {
 699     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 700     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 701     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 702     directive = DirectivesStack::getMatchingDirective(cch, comp);
 703   } else {
 704     // Calling with NULL matches default directive
 705     directive = DirectivesStack::getDefaultDirective(comp);
 706   }
 707   bool result = comp->is_intrinsic_available(mh, directive);
 708   DirectivesStack::release(directive);
 709   return result;
 710 WB_END
 711 
 712 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 713   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 714   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 715   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 716   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 717   return (code != NULL ? code->comp_level() : CompLevel_none);
 718 WB_END
 719 
 720 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 721   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 722   CHECK_JNI_EXCEPTION(env);
 723   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 724   if (is_osr) {
 725     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 726   } else {
 727     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 728   }
 729 WB_END
 730 
 731 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 732   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 733   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 734   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 735   CompiledMethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 736   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 737 WB_END
 738 
 739 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 740   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 741   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 742   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 743   bool result = mh->dont_inline();
 744   mh->set_dont_inline(value == JNI_TRUE);
 745   return result;
 746 WB_END
 747 
 748 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 749   if (comp_level == CompLevel_any) {
 750     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 751         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 752   } else {
 753     return CompileBroker::queue_size(comp_level);
 754   }
 755 WB_END
 756 
 757 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 758   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 759   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 760   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 761   bool result = mh->force_inline();
 762   mh->set_force_inline(value == JNI_TRUE);
 763   return result;
 764 WB_END
 765 
 766 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
 767   // Screen for unavailable/bad comp level or null method
 768   if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier) ||
 769       CompileBroker::compiler(comp_level) == NULL) {
 770     return false;
 771   }
 772   methodHandle mh(THREAD, method);
 773   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, THREAD);
 774   MutexLockerEx mu(Compile_lock);
 775   return (mh->queued_for_compilation() || nm != NULL);
 776 }
 777 
 778 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
 779   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 780   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 781   return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
 782 WB_END
 783 
 784 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
 785   instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
 786   return WhiteBox::compile_method(ikh->class_initializer(), comp_level, InvocationEntryBci, THREAD);
 787 WB_END
 788 
 789 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
 790   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 791   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 792 
 793   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 794   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
 795   bool result = directive->PrintAssemblyOption;
 796   DirectivesStack::release(directive);
 797 
 798   return result;
 799 WB_END
 800 
 801 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
 802   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 803   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 804 
 805   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 806 
 807   ResourceMark rm;
 808   const char* error_msg = NULL;
 809   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 810   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
 811 
 812   if (m == NULL) {
 813     assert(error_msg != NULL, "Always have an error message");
 814     tty->print_cr("Got error: %s", error_msg);
 815     return -1; // Pattern failed
 816   }
 817 
 818   // Pattern works - now check if it matches
 819   int result;
 820   if (m->match(mh, InlineMatcher::force_inline)) {
 821     result = 2; // Force inline match
 822   } else if (m->match(mh, InlineMatcher::dont_inline)) {
 823     result = 1; // Dont inline match
 824   } else {
 825     result = 0; // No match
 826   }
 827   delete m;
 828   return result;
 829 WB_END
 830 
 831 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
 832   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 833   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 834 
 835   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 836 
 837   ResourceMark rm;
 838   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 839 
 840   const char* error_msg = NULL;
 841 
 842   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
 843   if (m == NULL) {
 844     assert(error_msg != NULL, "Must have error_msg");
 845     tty->print_cr("Got error: %s", error_msg);
 846     return -1;
 847   }
 848 
 849   // Pattern works - now check if it matches
 850   int result = m->matches(mh);
 851   delete m;
 852   assert(result == 0 || result == 1, "Result out of range");
 853   return result;
 854 WB_END
 855 
 856 static AlwaysFalseClosure always_false;
 857 
 858 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
 859   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 860   CHECK_JNI_EXCEPTION(env);
 861   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 862   MutexLockerEx mu(Compile_lock);
 863   MethodData* mdo = mh->method_data();
 864   MethodCounters* mcs = mh->method_counters();
 865 
 866   if (mdo != NULL) {
 867     mdo->init();
 868     ResourceMark rm;
 869     int arg_count = mdo->method()->size_of_parameters();
 870     for (int i = 0; i < arg_count; i++) {
 871       mdo->set_arg_modified(i, 0);
 872     }
 873     MutexLockerEx mu(mdo->extra_data_lock());
 874     mdo->clean_method_data(&always_false);
 875   }
 876 
 877   mh->clear_not_c1_compilable();
 878   mh->clear_not_c2_compilable();
 879   mh->clear_not_c2_osr_compilable();
 880   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
 881   if (mcs != NULL) {
 882     mcs->backedge_counter()->init();
 883     mcs->invocation_counter()->init();
 884     mcs->set_interpreter_invocation_count(0);
 885     mcs->set_interpreter_throwout_count(0);
 886 
 887 #ifdef TIERED
 888     mcs->set_rate(0.0F);
 889     mh->set_prev_event_count(0);
 890     mh->set_prev_time(0);
 891 #endif
 892   }
 893 WB_END
 894 
 895 template <typename T>
 896 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
 897   if (name == NULL) {
 898     return false;
 899   }
 900   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 901   const char* flag_name = env->GetStringUTFChars(name, NULL);
 902   CHECK_JNI_EXCEPTION_(env, false);
 903   Flag::Error result = (*TAt)(flag_name, value, true, true);
 904   env->ReleaseStringUTFChars(name, flag_name);
 905   return (result == Flag::SUCCESS);
 906 }
 907 
 908 template <typename T>
 909 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
 910   if (name == NULL) {
 911     return false;
 912   }
 913   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 914   const char* flag_name = env->GetStringUTFChars(name, NULL);
 915   CHECK_JNI_EXCEPTION_(env, false);
 916   Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
 917   env->ReleaseStringUTFChars(name, flag_name);
 918   return (result == Flag::SUCCESS);
 919 }
 920 
 921 template <typename T>
 922 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
 923   ResourceMark rm(thread);
 924   jclass clazz = env->FindClass(name->as_C_string());
 925   CHECK_JNI_EXCEPTION_(env, NULL);
 926   jmethodID methodID = env->GetStaticMethodID(clazz,
 927         vmSymbols::valueOf_name()->as_C_string(),
 928         sig->as_C_string());
 929   CHECK_JNI_EXCEPTION_(env, NULL);
 930   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
 931   CHECK_JNI_EXCEPTION_(env, NULL);
 932   return result;
 933 }
 934 
 935 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
 936   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
 937 }
 938 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
 939   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
 940 }
 941 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
 942   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
 943 }
 944 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
 945   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
 946 }*/
 947 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
 948   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
 949 }
 950 
 951 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
 952   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 953   const char* flag_name = env->GetStringUTFChars(name, NULL);
 954   CHECK_JNI_EXCEPTION_(env, NULL);
 955   Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
 956   env->ReleaseStringUTFChars(name, flag_name);
 957   return result;
 958 }
 959 
 960 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
 961   Flag* flag = getVMFlag(thread, env, name);
 962   return (flag != NULL) && flag->is_constant_in_binary();
 963 WB_END
 964 
 965 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
 966   Flag* flag = getVMFlag(thread, env, name);
 967   return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
 968 WB_END
 969 
 970 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
 971   bool result;
 972   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
 973     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 974     return booleanBox(thread, env, result);
 975   }
 976   return NULL;
 977 WB_END
 978 
 979 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
 980   int result;
 981   if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
 982     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 983     return longBox(thread, env, result);
 984   }
 985   return NULL;
 986 WB_END
 987 
 988 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
 989   uint result;
 990   if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
 991     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 992     return longBox(thread, env, result);
 993   }
 994   return NULL;
 995 WB_END
 996 
 997 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
 998   intx result;
 999   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
1000     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1001     return longBox(thread, env, result);
1002   }
1003   return NULL;
1004 WB_END
1005 
1006 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1007   uintx result;
1008   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
1009     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1010     return longBox(thread, env, result);
1011   }
1012   return NULL;
1013 WB_END
1014 
1015 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1016   uint64_t result;
1017   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
1018     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1019     return longBox(thread, env, result);
1020   }
1021   return NULL;
1022 WB_END
1023 
1024 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1025   uintx result;
1026   if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
1027     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1028     return longBox(thread, env, result);
1029   }
1030   return NULL;
1031 WB_END
1032 
1033 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1034   double result;
1035   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
1036     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1037     return doubleBox(thread, env, result);
1038   }
1039   return NULL;
1040 WB_END
1041 
1042 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1043   ccstr ccstrResult;
1044   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
1045     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1046     jstring result = env->NewStringUTF(ccstrResult);
1047     CHECK_JNI_EXCEPTION_(env, NULL);
1048     return result;
1049   }
1050   return NULL;
1051 WB_END
1052 
1053 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1054   bool result = value == JNI_TRUE ? true : false;
1055   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
1056 WB_END
1057 
1058 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1059   int result = value;
1060   SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
1061 WB_END
1062 
1063 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1064   uint result = value;
1065   SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
1066 WB_END
1067 
1068 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1069   intx result = value;
1070   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
1071 WB_END
1072 
1073 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1074   uintx result = value;
1075   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
1076 WB_END
1077 
1078 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1079   uint64_t result = value;
1080   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
1081 WB_END
1082 
1083 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1084   size_t result = value;
1085   SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
1086 WB_END
1087 
1088 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1089   double result = value;
1090   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
1091 WB_END
1092 
1093 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1094   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1095   const char* ccstrValue;
1096   if (value == NULL) {
1097     ccstrValue = NULL;
1098   }
1099   else {
1100     ccstrValue = env->GetStringUTFChars(value, NULL);
1101     CHECK_JNI_EXCEPTION(env);
1102   }
1103   ccstr ccstrResult = ccstrValue;
1104   bool needFree;
1105   {
1106     ThreadInVMfromNative ttvfn(thread); // back to VM
1107     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
1108   }
1109   if (value != NULL) {
1110     env->ReleaseStringUTFChars(value, ccstrValue);
1111   }
1112   if (needFree) {
1113     FREE_C_HEAP_ARRAY(char, ccstrResult);
1114   }
1115 WB_END
1116 
1117 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1118   WhiteBox::compilation_locked = true;
1119 WB_END
1120 
1121 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1122   MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1123   WhiteBox::compilation_locked = false;
1124   mo.notify_all();
1125 WB_END
1126 
1127 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
1128   // Force a code cache sweep and block until it finished
1129   NMethodSweeper::force_sweep();
1130 WB_END
1131 
1132 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1133   ResourceMark rm(THREAD);
1134   int len;
1135   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1136   return (StringTable::lookup(name, len) != NULL);
1137 WB_END
1138 
1139 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1140   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
1141   Universe::heap()->collect(GCCause::_wb_full_gc);
1142 #if INCLUDE_ALL_GCS
1143   if (UseG1GC) {
1144     // Needs to be cleared explicitly for G1
1145     Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
1146   }
1147 #endif // INCLUDE_ALL_GCS
1148 WB_END
1149 
1150 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1151   Universe::heap()->collect(GCCause::_wb_young_gc);
1152 WB_END
1153 
1154 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1155   // static+volatile in order to force the read to happen
1156   // (not be eliminated by the compiler)
1157   static char c;
1158   static volatile char* p;
1159 
1160   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1161   if (p == NULL) {
1162     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1163   }
1164 
1165   c = *p;
1166 WB_END
1167 
1168 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1169   const char* features = VM_Version::features_string();
1170   ThreadToNativeFromVM ttn(thread);
1171   jstring features_string = env->NewStringUTF(features);
1172 
1173   CHECK_JNI_EXCEPTION_(env, NULL);
1174 
1175   return features_string;
1176 WB_END
1177 
1178 int WhiteBox::get_blob_type(const CodeBlob* code) {
1179   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1180   if (code->is_aot()) {
1181     return -1;
1182   }
1183   return CodeCache::get_code_heap(code)->code_blob_type();
1184 }
1185 
1186 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1187   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1188   return CodeCache::get_code_heap(blob_type);
1189 }
1190 
1191 struct CodeBlobStub {
1192   CodeBlobStub(const CodeBlob* blob) :
1193       name(os::strdup(blob->name())),
1194       size(blob->size()),
1195       blob_type(WhiteBox::get_blob_type(blob)),
1196       address((jlong) blob) { }
1197   ~CodeBlobStub() { os::free((void*) name); }
1198   const char* const name;
1199   const jint        size;
1200   const jint        blob_type;
1201   const jlong       address;
1202 };
1203 
1204 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1205   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1206   CHECK_JNI_EXCEPTION_(env, NULL);
1207   jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1208 
1209   jstring name = env->NewStringUTF(cb->name);
1210   CHECK_JNI_EXCEPTION_(env, NULL);
1211   env->SetObjectArrayElement(result, 0, name);
1212 
1213   jobject obj = integerBox(thread, env, cb->size);
1214   CHECK_JNI_EXCEPTION_(env, NULL);
1215   env->SetObjectArrayElement(result, 1, obj);
1216 
1217   obj = integerBox(thread, env, cb->blob_type);
1218   CHECK_JNI_EXCEPTION_(env, NULL);
1219   env->SetObjectArrayElement(result, 2, obj);
1220 
1221   obj = longBox(thread, env, cb->address);
1222   CHECK_JNI_EXCEPTION_(env, NULL);
1223   env->SetObjectArrayElement(result, 3, obj);
1224 
1225   return result;
1226 }
1227 
1228 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1229   ResourceMark rm(THREAD);
1230   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1231   CHECK_JNI_EXCEPTION_(env, NULL);
1232   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1233   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1234   jobjectArray result = NULL;
1235   if (code == NULL) {
1236     return result;
1237   }
1238   int comp_level = code->comp_level();
1239   int insts_size = comp_level == CompLevel_aot ? code->code_end() - code->code_begin() : code->insts_size();
1240 
1241   ThreadToNativeFromVM ttn(thread);
1242   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1243   CHECK_JNI_EXCEPTION_(env, NULL);
1244   result = env->NewObjectArray(5, clazz, NULL);
1245   if (result == NULL) {
1246     return result;
1247   }
1248 
1249   CodeBlobStub stub(code);
1250   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1251   CHECK_JNI_EXCEPTION_(env, NULL);
1252   env->SetObjectArrayElement(result, 0, codeBlob);
1253 
1254   jobject level = integerBox(thread, env, comp_level);
1255   CHECK_JNI_EXCEPTION_(env, NULL);
1256   env->SetObjectArrayElement(result, 1, level);
1257 
1258   jbyteArray insts = env->NewByteArray(insts_size);
1259   CHECK_JNI_EXCEPTION_(env, NULL);
1260   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1261   env->SetObjectArrayElement(result, 2, insts);
1262 
1263   jobject id = integerBox(thread, env, code->compile_id());
1264   CHECK_JNI_EXCEPTION_(env, NULL);
1265   env->SetObjectArrayElement(result, 3, id);
1266 
1267   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1268   CHECK_JNI_EXCEPTION_(env, NULL);
1269   env->SetObjectArrayElement(result, 4, entry_point);
1270 
1271   return result;
1272 WB_END
1273 
1274 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1275   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1276   BufferBlob* blob;
1277   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1278   if (full_size < size) {
1279     full_size += round_to(size - full_size, oopSize);
1280   }
1281   {
1282     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1283     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1284     ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1285   }
1286   // Track memory usage statistic after releasing CodeCache_lock
1287   MemoryService::track_code_cache_memory_usage();
1288   return blob;
1289 }
1290 
1291 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1292   if (size < 0) {
1293     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1294       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1295   }
1296   return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1297 WB_END
1298 
1299 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1300   if (addr == 0) {
1301     return;
1302   }
1303   BufferBlob::free((BufferBlob*) addr);
1304 WB_END
1305 
1306 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1307   ResourceMark rm;
1308   GrowableArray<CodeBlobStub*> blobs;
1309   {
1310     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1311     CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1312     if (heap == NULL) {
1313       return NULL;
1314     }
1315     for (CodeBlob* cb = (CodeBlob*) heap->first();
1316          cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1317       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1318       new (stub) CodeBlobStub(cb);
1319       blobs.append(stub);
1320     }
1321   }
1322   if (blobs.length() == 0) {
1323     return NULL;
1324   }
1325   ThreadToNativeFromVM ttn(thread);
1326   jobjectArray result = NULL;
1327   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1328   CHECK_JNI_EXCEPTION_(env, NULL);
1329   result = env->NewObjectArray(blobs.length(), clazz, NULL);
1330   CHECK_JNI_EXCEPTION_(env, NULL);
1331   if (result == NULL) {
1332     return result;
1333   }
1334   int i = 0;
1335   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1336        it != blobs.end(); ++it) {
1337     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1338     CHECK_JNI_EXCEPTION_(env, NULL);
1339     env->SetObjectArrayElement(result, i, obj);
1340     CHECK_JNI_EXCEPTION_(env, NULL);
1341     ++i;
1342   }
1343   return result;
1344 WB_END
1345 
1346 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1347   return CompileBroker::get_compilation_activity_mode();
1348 WB_END
1349 
1350 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1351   if (addr == 0) {
1352     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1353       "WB_GetCodeBlob: addr is null");
1354   }
1355   ThreadToNativeFromVM ttn(thread);
1356   CodeBlobStub stub((CodeBlob*) addr);
1357   return codeBlob2objectArray(thread, env, &stub);
1358 WB_END
1359 
1360 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1361   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1362   CHECK_JNI_EXCEPTION_(env, 0);
1363   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1364   return (jlong) mh->method_data();
1365 WB_END
1366 
1367 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1368   return (jlong) Thread::current()->stack_size();
1369 WB_END
1370 
1371 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1372   JavaThread* t = JavaThread::current();
1373   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1374 WB_END
1375 
1376 
1377 int WhiteBox::array_bytes_to_length(size_t bytes) {
1378   return Array<u1>::bytes_to_length(bytes);
1379 }
1380 
1381 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1382   if (size < 0) {
1383     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1384         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1385   }
1386 
1387   oop class_loader_oop = JNIHandles::resolve(class_loader);
1388   ClassLoaderData* cld = class_loader_oop != NULL
1389       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1390       : ClassLoaderData::the_null_class_loader_data();
1391 
1392   void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1393 
1394   return (jlong)(uintptr_t)metadata;
1395 WB_END
1396 
1397 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1398   oop class_loader_oop = JNIHandles::resolve(class_loader);
1399   ClassLoaderData* cld = class_loader_oop != NULL
1400       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1401       : ClassLoaderData::the_null_class_loader_data();
1402 
1403   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1404 WB_END
1405 
1406 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jstring version, jstring location,
1407                                 jobjectArray packages))
1408   ResourceMark rm(THREAD);
1409 
1410   objArrayOop packages_oop = objArrayOop(JNIHandles::resolve(packages));
1411   objArrayHandle packages_h(THREAD, packages_oop);
1412   int num_packages = (packages_h == NULL ? 0 : packages_h->length());
1413 
1414   char** pkgs = NULL;
1415   if (num_packages > 0) {
1416     pkgs = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char*, num_packages);
1417     for (int x = 0; x < num_packages; x++) {
1418       oop pkg_str = packages_h->obj_at(x);
1419       if (pkg_str == NULL || !pkg_str->is_a(SystemDictionary::String_klass())) {
1420         THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1421                   err_msg("Bad package name"));
1422       }
1423       pkgs[x] = java_lang_String::as_utf8_string(pkg_str);
1424     }
1425   }
1426   Modules::define_module(module, version, location, (const char* const*)pkgs, num_packages, CHECK);
1427 WB_END
1428 
1429 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1430   ResourceMark rm(THREAD);
1431   char* package_name = NULL;
1432   if (package != NULL) {
1433       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1434   }
1435   Modules::add_module_exports_qualified(from_module, package_name, to_module, CHECK);
1436 WB_END
1437 
1438 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1439   ResourceMark rm(THREAD);
1440   char* package_name = NULL;
1441   if (package != NULL) {
1442       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1443   }
1444   Modules::add_module_exports_to_all_unnamed(module, package_name, CHECK);
1445 WB_END
1446 
1447 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1448   ResourceMark rm(THREAD);
1449   char* package_name = NULL;
1450   if (package != NULL) {
1451       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1452   }
1453   Modules::add_module_exports(module, package_name, NULL, CHECK);
1454 WB_END
1455 
1456 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1457   Modules::add_reads_module(from_module, source_module, CHECK);
1458 WB_END
1459 
1460 WB_ENTRY(void, WB_AddModulePackage(JNIEnv* env, jobject o, jclass module, jstring package))
1461   ResourceMark rm(THREAD);
1462   char* package_name = NULL;
1463   if (package != NULL) {
1464       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1465   }
1466   Modules::add_module_package(module, package_name, CHECK);
1467 WB_END
1468 
1469 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1470   if (inc < 0) {
1471     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1472         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1473   }
1474 
1475   jlong max_size_t = (jlong) ((size_t) -1);
1476   if (inc > max_size_t) {
1477     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1478         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1479   }
1480 
1481   size_t new_cap_until_GC = 0;
1482   size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1483   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1484   if (!success) {
1485     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1486                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1487                 "due to contention with another thread");
1488   }
1489   return (jlong) new_cap_until_GC;
1490 WB_END
1491 
1492 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1493   return (jlong) MetaspaceGC::capacity_until_GC();
1494 WB_END
1495 
1496 WB_ENTRY(jboolean, WB_MetaspaceShouldConcurrentCollect(JNIEnv* env, jobject wb))
1497   return MetaspaceGC::should_concurrent_collect();
1498 WB_END
1499 
1500 
1501 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1502   Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1503                                            Monitor::_safepoint_check_always :
1504                                            Monitor::_safepoint_check_never;
1505   MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1506                    attemptedNoSafepointValue == JNI_TRUE);
1507 WB_END
1508 
1509 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1510   oop obj_oop = JNIHandles::resolve(obj);
1511   return (jboolean) obj_oop->mark()->has_monitor();
1512 WB_END
1513 
1514 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1515   VM_ForceSafepoint force_safepoint_op;
1516   VMThread::execute(&force_safepoint_op);
1517 WB_END
1518 
1519 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1520   instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1521   return (jlong) ikh->constants();
1522 WB_END
1523 
1524 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1525   return ConstantPool::CPCACHE_INDEX_TAG;
1526 WB_END
1527 
1528 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1529   instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1530   ConstantPool* cp = ikh->constants();
1531   if (cp->cache() == NULL) {
1532       return -1;
1533   }
1534   return cp->cache()->length();
1535 WB_END
1536 
1537 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1538   instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1539   ConstantPool* cp = ikh->constants();
1540   if (cp->cache() == NULL) {
1541     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1542   }
1543   jint cpci = index;
1544   jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1545   if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1546     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1547   }
1548   jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1549   return cpi;
1550 WB_END
1551 
1552 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1553   return ConstantPool::encode_invokedynamic_index(index);
1554 WB_END
1555 
1556 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1557   VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1558   VMThread::execute(&clear_ics);
1559 WB_END
1560 
1561 template <typename T>
1562 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1563   assert(value != NULL, "sanity");
1564   if (method == NULL || name == NULL) {
1565     return false;
1566   }
1567   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1568   CHECK_JNI_EXCEPTION_(env, false);
1569   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1570   // can't be in VM when we call JNI
1571   ThreadToNativeFromVM ttnfv(thread);
1572   const char* flag_name = env->GetStringUTFChars(name, NULL);
1573   CHECK_JNI_EXCEPTION_(env, false);
1574   bool result =  CompilerOracle::has_option_value(mh, flag_name, *value);
1575   env->ReleaseStringUTFChars(name, flag_name);
1576   return result;
1577 }
1578 
1579 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1580   bool result;
1581   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1582     // can't be in VM when we call JNI
1583     ThreadToNativeFromVM ttnfv(thread);
1584     return booleanBox(thread, env, result);
1585   }
1586   return NULL;
1587 WB_END
1588 
1589 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1590   intx result;
1591   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1592     // can't be in VM when we call JNI
1593     ThreadToNativeFromVM ttnfv(thread);
1594     return longBox(thread, env, result);
1595   }
1596   return NULL;
1597 WB_END
1598 
1599 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1600   uintx result;
1601   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1602     // can't be in VM when we call JNI
1603     ThreadToNativeFromVM ttnfv(thread);
1604     return longBox(thread, env, result);
1605   }
1606   return NULL;
1607 WB_END
1608 
1609 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1610   double result;
1611   if (GetMethodOption <double> (thread, env, method, name, &result)) {
1612     // can't be in VM when we call JNI
1613     ThreadToNativeFromVM ttnfv(thread);
1614     return doubleBox(thread, env, result);
1615   }
1616   return NULL;
1617 WB_END
1618 
1619 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1620   ccstr ccstrResult;
1621   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1622     // can't be in VM when we call JNI
1623     ThreadToNativeFromVM ttnfv(thread);
1624     jstring result = env->NewStringUTF(ccstrResult);
1625     CHECK_JNI_EXCEPTION_(env, NULL);
1626     return result;
1627   }
1628   return NULL;
1629 WB_END
1630 
1631 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1632   oop obj_oop = JNIHandles::resolve(obj);
1633   return MetaspaceShared::is_in_shared_space((void*)obj_oop);
1634 WB_END
1635 
1636 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1637   return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1638 WB_END
1639 
1640 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1641   return StringTable::shared_string_ignored();
1642 WB_END
1643 
1644 //Some convenience methods to deal with objects from java
1645 int WhiteBox::offset_for_field(const char* field_name, oop object,
1646     Symbol* signature_symbol) {
1647   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1648   Thread* THREAD = Thread::current();
1649 
1650   //Get the class of our object
1651   Klass* arg_klass = object->klass();
1652   //Turn it into an instance-klass
1653   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1654 
1655   //Create symbols to look for in the class
1656   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1657       THREAD);
1658 
1659   //To be filled in with an offset of the field we're looking for
1660   fieldDescriptor fd;
1661 
1662   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1663   if (res == NULL) {
1664     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1665         name_symbol->as_C_string());
1666     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
1667   }
1668 
1669   //fetch the field at the offset we've found
1670   int dest_offset = fd.offset();
1671 
1672   return dest_offset;
1673 }
1674 
1675 
1676 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1677   int offset = offset_for_field(field_name, object,
1678       vmSymbols::string_signature());
1679   oop string = object->obj_field(offset);
1680   if (string == NULL) {
1681     return NULL;
1682   }
1683   const char* ret = java_lang_String::as_utf8_string(string);
1684   return ret;
1685 }
1686 
1687 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1688   int offset =
1689       offset_for_field(field_name, object, vmSymbols::bool_signature());
1690   bool ret = (object->bool_field(offset) == JNI_TRUE);
1691   return ret;
1692 }
1693 
1694 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1695   ResourceMark rm;
1696   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1697 
1698   //  one by one registration natives for exception catching
1699   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1700   CHECK_JNI_EXCEPTION(env);
1701   for (int i = 0, n = method_count; i < n; ++i) {
1702     // Skip dummy entries
1703     if (method_array[i].fnPtr == NULL) continue;
1704     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1705       jthrowable throwable_obj = env->ExceptionOccurred();
1706       if (throwable_obj != NULL) {
1707         env->ExceptionClear();
1708         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1709           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1710           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1711           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1712               method_array[i].name, method_array[i].signature);
1713         }
1714       } else {
1715         // Registration failed unexpectedly.
1716         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1717             method_array[i].name, method_array[i].signature);
1718         env->UnregisterNatives(wbclass);
1719         break;
1720       }
1721     }
1722   }
1723 }
1724 
1725 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
1726   // can't be in VM when we call JNI
1727   ThreadToNativeFromVM ttnfv(thread);
1728   const char* dir = env->GetStringUTFChars(compDirect, NULL);
1729   CHECK_JNI_EXCEPTION_(env, 0);
1730   int ret;
1731   {
1732     ThreadInVMfromNative ttvfn(thread); // back to VM
1733     ret = DirectivesParser::parse_string(dir, tty);
1734   }
1735   env->ReleaseStringUTFChars(compDirect, dir);
1736   // -1 for error parsing directive. Return 0 as number of directives added.
1737   if (ret == -1) {
1738     ret = 0;
1739   }
1740   return (jint) ret;
1741 WB_END
1742 
1743 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
1744   DirectivesStack::pop(count);
1745 WB_END
1746 
1747 #define CC (char*)
1748 
1749 static JNINativeMethod methods[] = {
1750   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
1751   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
1752   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
1753   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
1754   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
1755   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
1756   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
1757   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
1758   {CC"getHeapAlignment",                 CC"()J",                   (void*)&WB_GetHeapAlignment},
1759   {CC"isClassAlive0",                    CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
1760   {CC"parseCommandLine0",
1761       CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1762       (void*) &WB_ParseCommandLine
1763   },
1764   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1765                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
1766   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
1767                                                       (void*)&WB_AddToSystemClassLoaderSearch},
1768   {CC"getCompressedOopsMaxHeapSize", CC"()J",
1769       (void*)&WB_GetCompressedOopsMaxHeapSize},
1770   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
1771   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
1772   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
1773   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
1774 #if INCLUDE_ALL_GCS
1775   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
1776   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
1777   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
1778   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
1779   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
1780   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
1781   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
1782   {CC"g1StartConcMarkCycle",       CC"()Z",           (void*)&WB_G1StartMarkCycle  },
1783   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1784                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
1785   {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
1786   {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
1787   {CC"g1GetMixedGCInfo",   CC"(I)[J",                 (void*)&WB_G1GetMixedGCInfo },
1788 #endif // INCLUDE_ALL_GCS
1789 #if INCLUDE_NMT
1790   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
1791   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
1792   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
1793   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
1794   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
1795   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
1796   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
1797   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
1798   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
1799 #endif // INCLUDE_NMT
1800   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
1801   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
1802   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
1803                                                       (void*)&WB_DeoptimizeMethod  },
1804   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
1805                                                       (void*)&WB_IsMethodCompiled  },
1806   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1807                                                       (void*)&WB_IsMethodCompilable},
1808   {CC"isMethodQueuedForCompilation0",
1809       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
1810   {CC"isIntrinsicAvailable0",
1811       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1812                                                       (void*)&WB_IsIntrinsicAvailable},
1813   {CC"makeMethodNotCompilable0",
1814       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
1815   {CC"testSetDontInlineMethod0",
1816       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
1817   {CC"getMethodCompilationLevel0",
1818       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
1819   {CC"getMethodEntryBci0",
1820       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
1821   {CC"getCompileQueueSize",
1822       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
1823   {CC"testSetForceInlineMethod0",
1824       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
1825   {CC"enqueueMethodForCompilation0",
1826       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
1827   {CC"enqueueInitializerForCompilation0",
1828       CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
1829   {CC"clearMethodState0",
1830       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
1831   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
1832   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
1833   {CC"matchesMethod",
1834       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1835                                                       (void*)&WB_MatchesMethod},
1836   {CC"matchesInline",
1837       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1838                                                       (void*)&WB_MatchesInline},
1839   {CC"shouldPrintAssembly",
1840         CC"(Ljava/lang/reflect/Executable;I)Z",
1841                                                         (void*)&WB_ShouldPrintAssembly},
1842 
1843   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1844   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1845   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1846   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1847   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1848   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1849   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1850   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1851   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1852   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1853   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
1854                                                       (void*)&WB_SetStringVMFlag},
1855   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1856                                                       (void*)&WB_GetBooleanVMFlag},
1857   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
1858                                                       (void*)&WB_GetIntVMFlag},
1859   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1860                                                       (void*)&WB_GetUintVMFlag},
1861   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1862                                                       (void*)&WB_GetIntxVMFlag},
1863   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1864                                                       (void*)&WB_GetUintxVMFlag},
1865   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
1866                                                       (void*)&WB_GetUint64VMFlag},
1867   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1868                                                       (void*)&WB_GetSizeTVMFlag},
1869   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
1870                                                       (void*)&WB_GetDoubleVMFlag},
1871   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
1872                                                       (void*)&WB_GetStringVMFlag},
1873   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
1874   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
1875   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
1876   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
1877   {CC"allocateMetaspace",
1878      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
1879   {CC"freeMetaspace",
1880      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
1881   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
1882   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
1883   {CC"metaspaceShouldConcurrentCollect", CC"()Z",     (void*)&WB_MetaspaceShouldConcurrentCollect },
1884   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
1885   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1886                                                       (void*)&WB_GetNMethod         },
1887   {CC"forceNMethodSweep",  CC"()V",                   (void*)&WB_ForceNMethodSweep  },
1888   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
1889   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
1890   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1891   {CC"getCompilationActivityMode",
1892                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
1893   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
1894                                                       (void*)&WB_GetMethodData      },
1895   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
1896   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
1897   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
1898   {CC"DefineModule",       CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
1899                                                       (void*)&WB_DefineModule },
1900   {CC"AddModuleExports",   CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
1901                                                       (void*)&WB_AddModuleExports },
1902   {CC"AddReadsModule",     CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
1903                                                       (void*)&WB_AddReadsModule },
1904   {CC"AddModulePackage",   CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1905                                                       (void*)&WB_AddModulePackage },
1906   {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1907                                                       (void*)&WB_AddModuleExportsToAllUnnamed },
1908   {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1909                                                       (void*)&WB_AddModuleExportsToAll },
1910   {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
1911   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
1912   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
1913   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
1914   {CC"getConstantPoolCacheIndexTag0", CC"()I",  (void*)&WB_GetConstantPoolCacheIndexTag},
1915   {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_GetConstantPoolCacheLength},
1916   {CC"remapInstructionOperandFromCPCache0",
1917       CC"(Ljava/lang/Class;I)I",                      (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
1918   {CC"encodeConstantPoolIndyIndex0",
1919       CC"(I)I",                      (void*)&WB_ConstantPoolEncodeIndyIndex},
1920   {CC"getMethodBooleanOption",
1921       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1922                                                       (void*)&WB_GetMethodBooleaneOption},
1923   {CC"getMethodIntxOption",
1924       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1925                                                       (void*)&WB_GetMethodIntxOption},
1926   {CC"getMethodUintxOption",
1927       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1928                                                       (void*)&WB_GetMethodUintxOption},
1929   {CC"getMethodDoubleOption",
1930       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1931                                                       (void*)&WB_GetMethodDoubleOption},
1932   {CC"getMethodStringOption",
1933       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1934                                                       (void*)&WB_GetMethodStringOption},
1935   {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
1936   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
1937   {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
1938   {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
1939   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
1940                                                       (void*)&WB_AddCompilerDirective },
1941   {CC"removeCompilerDirective",   CC"(I)V",             (void*)&WB_RemoveCompilerDirective },
1942   {CC"currentGC",                 CC"()I",            (void*)&WB_CurrentGC},
1943   {CC"allSupportedGC",            CC"()I",            (void*)&WB_AllSupportedGC},
1944   {CC"gcSelectedByErgo",          CC"()Z",            (void*)&WB_GCSelectedByErgo},
1945 };
1946 
1947 #undef CC
1948 
1949 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1950   {
1951     if (WhiteBoxAPI) {
1952       // Make sure that wbclass is loaded by the null classloader
1953       instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1954       Handle loader(THREAD, ikh->class_loader());
1955       if (loader.is_null()) {
1956         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1957         WhiteBox::register_extended(env, wbclass, thread);
1958         WhiteBox::set_used();
1959       }
1960     }
1961   }
1962 JVM_END