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/array.hpp"
  43 #include "oops/constantPool.hpp"
  44 #include "oops/objArrayKlass.hpp"
  45 #include "oops/objArrayOop.inline.hpp"
  46 #include "oops/oop.inline.hpp"
  47 #include "prims/wbtestmethods/parserTests.hpp"
  48 #include "prims/whitebox.hpp"
  49 #include "runtime/arguments.hpp"
  50 #include "runtime/compilationPolicy.hpp"
  51 #include "runtime/deoptimization.hpp"
  52 #include "runtime/interfaceSupport.hpp"
  53 #include "runtime/javaCalls.hpp"
  54 #include "runtime/os.hpp"
  55 #include "runtime/sweeper.hpp"
  56 #include "runtime/thread.hpp"
  57 #include "runtime/threadSMR.hpp"
  58 #include "runtime/vm_version.hpp"
  59 #include "utilities/align.hpp"
  60 #include "utilities/debug.hpp"
  61 #include "utilities/exceptions.hpp"
  62 #include "utilities/macros.hpp"
  63 #if INCLUDE_ALL_GCS
  64 #include "gc/g1/concurrentMarkThread.hpp"
  65 #include "gc/g1/g1CollectedHeap.inline.hpp"
  66 #include "gc/g1/g1ConcurrentMark.hpp"
  67 #include "gc/g1/heapRegionRemSet.hpp"
  68 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
  69 #include "gc/parallel/adjoiningGenerations.hpp"
  70 #endif // INCLUDE_ALL_GCS
  71 #if INCLUDE_NMT
  72 #include "services/mallocSiteTable.hpp"
  73 #include "services/memTracker.hpp"
  74 #include "utilities/nativeCallStack.hpp"
  75 #endif // INCLUDE_NMT
  76 
  77 
  78 #define SIZE_T_MAX_VALUE ((size_t) -1)
  79 
  80 bool WhiteBox::_used = false;
  81 volatile bool WhiteBox::compilation_locked = false;
  82 
  83 class VM_WhiteBoxOperation : public VM_Operation {
  84  public:
  85   VM_WhiteBoxOperation()                         { }
  86   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
  87   bool allow_nested_vm_operations() const        { return true; }
  88 };
  89 
  90 
  91 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  92   return (jlong)(void*)JNIHandles::resolve(obj);
  93 WB_END
  94 
  95 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  96   return heapOopSize;
  97 WB_END
  98 
  99 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
 100   return os::vm_page_size();
 101 WB_END
 102 
 103 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
 104   return os::vm_allocation_granularity();
 105 WB_END
 106 
 107 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
 108   return os::large_page_size();
 109 WB_END
 110 
 111 class WBIsKlassAliveClosure : public KlassClosure {
 112     Symbol* _name;
 113     bool _found;
 114 public:
 115     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
 116 
 117     void do_klass(Klass* k) {
 118       if (_found) return;
 119       Symbol* ksym = k->name();
 120       if (ksym->fast_compare(_name) == 0) {
 121         _found = true;
 122       }
 123     }
 124 
 125     bool found() const {
 126         return _found;
 127     }
 128 };
 129 
 130 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
 131   oop h_name = JNIHandles::resolve(name);
 132   if (h_name == NULL) return false;
 133   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
 134   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 135 
 136   WBIsKlassAliveClosure closure(sym);
 137   ClassLoaderDataGraph::classes_do(&closure);
 138 
 139   return closure.found();
 140 WB_END
 141 
 142 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 143 #if INCLUDE_JVMTI
 144   ResourceMark rm;
 145   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 146   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 147   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 148   assert(err == JVMTI_ERROR_NONE, "must not fail");
 149 #endif
 150 }
 151 WB_END
 152 
 153 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 154 #if INCLUDE_JVMTI
 155   ResourceMark rm;
 156   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 157   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 158   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 159   assert(err == JVMTI_ERROR_NONE, "must not fail");
 160 #endif
 161 }
 162 WB_END
 163 
 164 
 165 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 166   return (jlong)Arguments::max_heap_for_compressed_oops();
 167 }
 168 WB_END
 169 
 170 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 171   CollectorPolicy * p = Universe::heap()->collector_policy();
 172   tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
 173     SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
 174     p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
 175     p->space_alignment(), p->heap_alignment());
 176 }
 177 WB_END
 178 
 179 #ifndef PRODUCT
 180 // Forward declaration
 181 void TestReservedSpace_test();
 182 void TestReserveMemorySpecial_test();
 183 void TestVirtualSpace_test();
 184 void TestMetaspaceAux_test();
 185 #endif
 186 
 187 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 188 #ifndef PRODUCT
 189   TestReservedSpace_test();
 190   TestReserveMemorySpecial_test();
 191   TestVirtualSpace_test();
 192   TestMetaspaceAux_test();
 193 #endif
 194 WB_END
 195 
 196 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 197   size_t granularity = os::vm_allocation_granularity();
 198   ReservedHeapSpace rhs(100 * granularity, granularity, false);
 199   VirtualSpace vs;
 200   vs.initialize(rhs, 50 * granularity);
 201 
 202   // Check if constraints are complied
 203   if (!( UseCompressedOops && rhs.base() != NULL &&
 204          Universe::narrow_oop_base() != NULL &&
 205          Universe::narrow_oop_use_implicit_null_checks() )) {
 206     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 207                   "\tUseCompressedOops is %d\n"
 208                   "\trhs.base() is " PTR_FORMAT "\n"
 209                   "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
 210                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
 211                   UseCompressedOops,
 212                   p2i(rhs.base()),
 213                   p2i(Universe::narrow_oop_base()),
 214                   Universe::narrow_oop_use_implicit_null_checks());
 215     return;
 216   }
 217   tty->print_cr("Reading from no access area... ");
 218   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 219                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 220 WB_END
 221 
 222 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 223                                            size_t magnitude, size_t iterations) {
 224   size_t granularity = os::vm_allocation_granularity();
 225   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
 226   VirtualSpace vs;
 227   if (!vs.initialize(rhs, 0)) {
 228     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 229     return 3;
 230   }
 231 
 232   int seed = os::random();
 233   tty->print_cr("Random seed is %d", seed);
 234   os::init_random(seed);
 235 
 236   for (size_t i = 0; i < iterations; i++) {
 237 
 238     // Whether we will shrink or grow
 239     bool shrink = os::random() % 2L == 0;
 240 
 241     // Get random delta to resize virtual space
 242     size_t delta = (size_t)os::random() % magnitude;
 243 
 244     // If we are about to shrink virtual space below zero, then expand instead
 245     if (shrink && vs.committed_size() < delta) {
 246       shrink = false;
 247     }
 248 
 249     // Resizing by delta
 250     if (shrink) {
 251       vs.shrink_by(delta);
 252     } else {
 253       // If expanding fails expand_by will silently return false
 254       vs.expand_by(delta, true);
 255     }
 256   }
 257   return 0;
 258 }
 259 
 260 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 261         jlong reserved_space_size, jlong magnitude, jlong iterations))
 262   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 263                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 264                 iterations);
 265   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 266     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 267     return 1;
 268   }
 269 
 270   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 271   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 272   if (sizeof(size_t) < sizeof(jlong)) {
 273     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 274     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 275         || iterations > size_t_max_value) {
 276       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 277       return 2;
 278     }
 279   }
 280 
 281   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 282                                         (size_t) magnitude, (size_t) iterations);
 283 WB_END
 284 
 285 static const jint serial_code   = 1;
 286 static const jint parallel_code = 2;
 287 static const jint cms_code      = 4;
 288 static const jint g1_code       = 8;
 289 
 290 WB_ENTRY(jint, WB_CurrentGC(JNIEnv* env, jobject o, jobject obj))
 291   if (UseSerialGC) {
 292     return serial_code;
 293   } else if (UseParallelGC || UseParallelOldGC) {
 294     return parallel_code;
 295   } if (UseConcMarkSweepGC) {
 296     return cms_code;
 297   } else if (UseG1GC) {
 298     return g1_code;
 299   }
 300   ShouldNotReachHere();
 301   return 0;
 302 WB_END
 303 
 304 WB_ENTRY(jint, WB_AllSupportedGC(JNIEnv* env, jobject o, jobject obj))
 305 #if INCLUDE_ALL_GCS
 306   return serial_code | parallel_code | cms_code | g1_code;
 307 #else
 308   return serial_code;
 309 #endif // INCLUDE_ALL_GCS
 310 WB_END
 311 
 312 WB_ENTRY(jboolean, WB_GCSelectedByErgo(JNIEnv* env, jobject o, jobject obj))
 313   if (UseSerialGC) {
 314     return FLAG_IS_ERGO(UseSerialGC);
 315   } else if (UseParallelGC) {
 316     return FLAG_IS_ERGO(UseParallelGC);
 317   } else if (UseParallelOldGC) {
 318     return FLAG_IS_ERGO(UseParallelOldGC);
 319   } else if (UseConcMarkSweepGC) {
 320     return FLAG_IS_ERGO(UseConcMarkSweepGC);
 321   } else if (UseG1GC) {
 322     return FLAG_IS_ERGO(UseG1GC);
 323   }
 324   ShouldNotReachHere();
 325   return false;
 326 WB_END
 327 
 328 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 329   oop p = JNIHandles::resolve(obj);
 330 #if INCLUDE_ALL_GCS
 331   if (UseG1GC) {
 332     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 333     const HeapRegion* hr = g1->heap_region_containing(p);
 334     if (hr == NULL) {
 335       return false;
 336     }
 337     return !(hr->is_young());
 338   } else if (UseParallelGC) {
 339     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 340     return !psh->is_in_young(p);
 341   }
 342 #endif // INCLUDE_ALL_GCS
 343   GenCollectedHeap* gch = GenCollectedHeap::heap();
 344   return !gch->is_in_young(p);
 345 WB_END
 346 
 347 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 348   oop p = JNIHandles::resolve(obj);
 349   return p->size() * HeapWordSize;
 350 WB_END
 351 
 352 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 353   size_t alignment = Universe::heap()->collector_policy()->space_alignment();
 354   return (jlong)alignment;
 355 WB_END
 356 
 357 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
 358   size_t alignment = Universe::heap()->collector_policy()->heap_alignment();
 359   return (jlong)alignment;
 360 WB_END
 361 
 362 WB_ENTRY(jboolean, WB_SupportsConcurrentGCPhaseControl(JNIEnv* env, jobject o))
 363   return Universe::heap()->supports_concurrent_phase_control();
 364 WB_END
 365 
 366 WB_ENTRY(jobjectArray, WB_GetConcurrentGCPhases(JNIEnv* env, jobject o))
 367   const char* const* phases = Universe::heap()->concurrent_phases();
 368   jint nphases = 0;
 369   for ( ; phases[nphases] != NULL; ++nphases) ;
 370 
 371   ResourceMark rm(thread);
 372   ThreadToNativeFromVM ttn(thread);
 373   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
 374   CHECK_JNI_EXCEPTION_(env, NULL);
 375 
 376   jobjectArray result = env->NewObjectArray(nphases, clazz, NULL);
 377   CHECK_JNI_EXCEPTION_(env, NULL);
 378 
 379   // If push fails, return with pending exception.
 380   if (env->PushLocalFrame(nphases) < 0) return NULL;
 381   for (jint i = 0; i < nphases; ++i) {
 382     jstring phase = env->NewStringUTF(phases[i]);
 383     CHECK_JNI_EXCEPTION_(env, NULL);
 384     env->SetObjectArrayElement(result, i, phase);
 385     CHECK_JNI_EXCEPTION_(env, NULL);
 386   }
 387   env->PopLocalFrame(NULL);
 388 
 389   return result;
 390 WB_END
 391 
 392 WB_ENTRY(jboolean, WB_RequestConcurrentGCPhase(JNIEnv* env, jobject o, jstring name))
 393   Handle h_name(THREAD, JNIHandles::resolve(name));
 394   ResourceMark rm;
 395   const char* c_name = java_lang_String::as_utf8_string(h_name());
 396   return Universe::heap()->request_concurrent_phase(c_name);
 397 WB_END
 398 
 399 #if INCLUDE_ALL_GCS
 400 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 401   if (UseG1GC) {
 402     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 403     oop result = JNIHandles::resolve(obj);
 404     const HeapRegion* hr = g1->heap_region_containing(result);
 405     return hr->is_humongous();
 406   }
 407   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
 408 WB_END
 409 
 410 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 411   if (UseG1GC) {
 412     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 413     const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 414     return hr->is_humongous();
 415   }
 416   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
 417 WB_END
 418 
 419 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 420   if (UseG1GC) {
 421     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 422     const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 423     return hr->is_free();
 424   }
 425   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
 426 WB_END
 427 
 428 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 429   if (UseG1GC) {
 430     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 431     size_t nr = g1->max_regions();
 432     return (jlong)nr;
 433   }
 434   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
 435 WB_END
 436 
 437 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 438   if (UseG1GC) {
 439     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 440     size_t nr = g1->num_free_regions();
 441     return (jlong)nr;
 442   }
 443   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
 444 WB_END
 445 
 446 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 447   if (UseG1GC) {
 448     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 449     return g1h->concurrent_mark()->cmThread()->during_cycle();
 450   }
 451   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
 452 WB_END
 453 
 454 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
 455   if (UseG1GC) {
 456     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 457     if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
 458       g1h->collect(GCCause::_wb_conc_mark);
 459       return true;
 460     }
 461     return false;
 462   }
 463   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1StartMarkCycle: G1 GC is not enabled");
 464 WB_END
 465 
 466 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 467   if (UseG1GC) {
 468     return (jint)HeapRegion::GrainBytes;
 469   }
 470   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
 471 WB_END
 472 
 473 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
 474 #if INCLUDE_ALL_GCS
 475   if (UseParallelGC) {
 476     return ParallelScavengeHeap::heap()->gens()->virtual_spaces()->alignment();
 477   }
 478 #endif // INCLUDE_ALL_GCS
 479   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
 480 WB_END
 481 
 482 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
 483 #if INCLUDE_ALL_GCS
 484   if (UseParallelGC) {
 485     return ParallelScavengeHeap::heap()->generation_alignment();
 486   }
 487 #endif // INCLUDE_ALL_GCS
 488   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
 489 WB_END
 490 
 491 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 492 #if INCLUDE_ALL_GCS
 493   if (UseG1GC) {
 494     ResourceMark rm(THREAD);
 495     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 496     MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 497     Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 498     return JNIHandles::make_local(env, h());
 499   }
 500 #endif // INCLUDE_ALL_GCS
 501   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
 502 WB_END
 503 
 504 class OldRegionsLivenessClosure: public HeapRegionClosure {
 505 
 506  private:
 507   const int _liveness;
 508   size_t _total_count;
 509   size_t _total_memory;
 510   size_t _total_memory_to_free;
 511 
 512  public:
 513   OldRegionsLivenessClosure(int liveness) :
 514     _liveness(liveness),
 515     _total_count(0),
 516     _total_memory(0),
 517     _total_memory_to_free(0) { }
 518 
 519     size_t total_count() { return _total_count; }
 520     size_t total_memory() { return _total_memory; }
 521     size_t total_memory_to_free() { return _total_memory_to_free; }
 522 
 523   bool doHeapRegion(HeapRegion* r) {
 524     if (r->is_old()) {
 525       size_t prev_live = r->marked_bytes();
 526       size_t live = r->live_bytes();
 527       size_t size = r->used();
 528       size_t reg_size = HeapRegion::GrainBytes;
 529       if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
 530         _total_memory += size;
 531         ++_total_count;
 532         if (size == reg_size) {
 533         // we don't include non-full regions since they are unlikely included in mixed gc
 534         // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
 535           _total_memory_to_free += size - prev_live;
 536         }
 537       }
 538     }
 539     return false;
 540   }
 541 };
 542 
 543 
 544 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
 545   if (!UseG1GC) {
 546     THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
 547   }
 548   if (liveness < 0) {
 549     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
 550   }
 551 
 552   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 553   OldRegionsLivenessClosure rli(liveness);
 554   g1h->heap_region_iterate(&rli);
 555 
 556   typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
 557   result->long_at_put(0, rli.total_count());
 558   result->long_at_put(1, rli.total_memory());
 559   result->long_at_put(2, rli.total_memory_to_free());
 560   return (jlongArray) JNIHandles::make_local(env, result);
 561 WB_END
 562 
 563 #endif // INCLUDE_ALL_GCS
 564 
 565 #if INCLUDE_NMT
 566 // Alloc memory using the test memory type so that we can use that to see if
 567 // NMT picks it up correctly
 568 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 569   jlong addr = 0;
 570   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 571   return addr;
 572 WB_END
 573 
 574 // Alloc memory with pseudo call stack. The test can create psudo malloc
 575 // allocation site to stress the malloc tracking.
 576 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 577   address pc = (address)(size_t)pseudo_stack;
 578   NativeCallStack stack(&pc, 1);
 579   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 580 WB_END
 581 
 582 // Free the memory allocated by NMTAllocTest
 583 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 584   os::free((void*)(uintptr_t)mem);
 585 WB_END
 586 
 587 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 588   jlong addr = 0;
 589 
 590   addr = (jlong)(uintptr_t)os::reserve_memory(size);
 591   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 592 
 593   return addr;
 594 WB_END
 595 
 596 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 597   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 598   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 599 WB_END
 600 
 601 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 602   os::uncommit_memory((char *)(uintptr_t)addr, size);
 603 WB_END
 604 
 605 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 606   os::release_memory((char *)(uintptr_t)addr, size);
 607 WB_END
 608 
 609 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 610   // Test that we can downgrade NMT levels but not upgrade them.
 611   if (MemTracker::tracking_level() == NMT_off) {
 612     MemTracker::transition_to(NMT_off);
 613     return MemTracker::tracking_level() == NMT_off;
 614   } else {
 615     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 616     MemTracker::transition_to(NMT_summary);
 617     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 618 
 619     // Can't go to detail once NMT is set to summary.
 620     MemTracker::transition_to(NMT_detail);
 621     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 622 
 623     // Shutdown sets tracking level to minimal.
 624     MemTracker::shutdown();
 625     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 626 
 627     // Once the tracking level is minimal, we cannot increase to summary.
 628     // The code ignores this request instead of asserting because if the malloc site
 629     // table overflows in another thread, it tries to change the code to summary.
 630     MemTracker::transition_to(NMT_summary);
 631     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 632 
 633     // Really can never go up to detail, verify that the code would never do this.
 634     MemTracker::transition_to(NMT_detail);
 635     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 636     return MemTracker::tracking_level() == NMT_minimal;
 637   }
 638 WB_END
 639 
 640 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 641   int hash_size = MallocSiteTable::hash_buckets();
 642   assert(hash_size > 0, "NMT hash_size should be > 0");
 643   return (jint)hash_size;
 644 WB_END
 645 #endif // INCLUDE_NMT
 646 
 647 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 648   assert(method != NULL, "method should not be null");
 649   ThreadToNativeFromVM ttn(thread);
 650   return env->FromReflectedMethod(method);
 651 }
 652 
 653 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 654 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 655  private:
 656   int _result;
 657   const bool _make_not_entrant;
 658  public:
 659   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 660         _result(0), _make_not_entrant(make_not_entrant) { }
 661   int  result() const { return _result; }
 662 
 663   void doit() {
 664     for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
 665       if (t->has_last_Java_frame()) {
 666         for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
 667           frame* f = fst.current();
 668           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 669             RegisterMap* reg_map = fst.register_map();
 670             Deoptimization::deoptimize(t, *f, reg_map);
 671             if (_make_not_entrant) {
 672                 CompiledMethod* cm = CodeCache::find_compiled(f->pc());
 673                 assert(cm != NULL, "sanity check");
 674                 cm->make_not_entrant();
 675             }
 676             ++_result;
 677           }
 678         }
 679       }
 680     }
 681   }
 682 };
 683 
 684 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 685   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 686   VMThread::execute(&op);
 687   return op.result();
 688 WB_END
 689 
 690 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 691   MutexLockerEx mu(Compile_lock);
 692   CodeCache::mark_all_nmethods_for_deoptimization();
 693   VM_Deoptimize op;
 694   VMThread::execute(&op);
 695 WB_END
 696 
 697 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 698   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 699   int result = 0;
 700   CHECK_JNI_EXCEPTION_(env, result);
 701   MutexLockerEx mu(Compile_lock);
 702   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 703   if (is_osr) {
 704     result += mh->mark_osr_nmethods();
 705   } else if (mh->code() != NULL) {
 706     mh->code()->mark_for_deoptimization();
 707     ++result;
 708   }
 709   result += CodeCache::mark_for_deoptimization(mh());
 710   if (result > 0) {
 711     VM_Deoptimize op;
 712     VMThread::execute(&op);
 713   }
 714   return result;
 715 WB_END
 716 
 717 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 718   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 719   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 720   MutexLockerEx mu(Compile_lock);
 721   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 722   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 723   if (code == NULL) {
 724     return JNI_FALSE;
 725   }
 726   return (code->is_alive() && !code->is_marked_for_deoptimization());
 727 WB_END
 728 
 729 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 730   if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 731     return false;
 732   }
 733   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 734   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 735   MutexLockerEx mu(Compile_lock);
 736   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 737   if (is_osr) {
 738     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 739   } else {
 740     return CompilationPolicy::can_be_compiled(mh, comp_level);
 741   }
 742 WB_END
 743 
 744 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 745   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 746   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 747   MutexLockerEx mu(Compile_lock);
 748   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 749   return mh->queued_for_compilation();
 750 WB_END
 751 
 752 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 753   if (compLevel < CompLevel_none || compLevel > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 754     return false; // Intrinsic is not available on a non-existent compilation level.
 755   }
 756   jmethodID method_id, compilation_context_id;
 757   method_id = reflected_method_to_jmid(thread, env, method);
 758   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 759   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 760 
 761   DirectiveSet* directive;
 762   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 763   assert(comp != NULL, "compiler not available");
 764   if (compilation_context != NULL) {
 765     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 766     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 767     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 768     directive = DirectivesStack::getMatchingDirective(cch, comp);
 769   } else {
 770     // Calling with NULL matches default directive
 771     directive = DirectivesStack::getDefaultDirective(comp);
 772   }
 773   bool result = comp->is_intrinsic_available(mh, directive);
 774   DirectivesStack::release(directive);
 775   return result;
 776 WB_END
 777 
 778 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 779   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 780   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 781   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 782   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 783   return (code != NULL ? code->comp_level() : CompLevel_none);
 784 WB_END
 785 
 786 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 787   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 788   CHECK_JNI_EXCEPTION(env);
 789   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 790   if (is_osr) {
 791     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 792   } else {
 793     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 794   }
 795 WB_END
 796 
 797 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 798   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 799   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 800   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 801   CompiledMethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 802   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 803 WB_END
 804 
 805 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 806   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 807   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 808   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 809   bool result = mh->dont_inline();
 810   mh->set_dont_inline(value == JNI_TRUE);
 811   return result;
 812 WB_END
 813 
 814 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 815   if (comp_level == CompLevel_any) {
 816     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 817         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 818   } else {
 819     return CompileBroker::queue_size(comp_level);
 820   }
 821 WB_END
 822 
 823 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 824   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 825   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 826   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 827   bool result = mh->force_inline();
 828   mh->set_force_inline(value == JNI_TRUE);
 829   return result;
 830 WB_END
 831 
 832 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
 833   // Screen for unavailable/bad comp level or null method
 834   if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier) ||
 835       CompileBroker::compiler(comp_level) == NULL) {
 836     return false;
 837   }
 838   methodHandle mh(THREAD, method);
 839   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, THREAD);
 840   MutexLockerEx mu(Compile_lock);
 841   return (mh->queued_for_compilation() || nm != NULL);
 842 }
 843 
 844 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
 845   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 846   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 847   return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
 848 WB_END
 849 
 850 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
 851   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
 852   return WhiteBox::compile_method(ik->class_initializer(), comp_level, InvocationEntryBci, THREAD);
 853 WB_END
 854 
 855 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
 856   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 857   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 858 
 859   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 860   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
 861   bool result = directive->PrintAssemblyOption;
 862   DirectivesStack::release(directive);
 863 
 864   return result;
 865 WB_END
 866 
 867 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
 868   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 869   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 870 
 871   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 872 
 873   ResourceMark rm;
 874   const char* error_msg = NULL;
 875   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 876   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
 877 
 878   if (m == NULL) {
 879     assert(error_msg != NULL, "Always have an error message");
 880     tty->print_cr("Got error: %s", error_msg);
 881     return -1; // Pattern failed
 882   }
 883 
 884   // Pattern works - now check if it matches
 885   int result;
 886   if (m->match(mh, InlineMatcher::force_inline)) {
 887     result = 2; // Force inline match
 888   } else if (m->match(mh, InlineMatcher::dont_inline)) {
 889     result = 1; // Dont inline match
 890   } else {
 891     result = 0; // No match
 892   }
 893   delete m;
 894   return result;
 895 WB_END
 896 
 897 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
 898   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 899   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 900 
 901   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 902 
 903   ResourceMark rm;
 904   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 905 
 906   const char* error_msg = NULL;
 907 
 908   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
 909   if (m == NULL) {
 910     assert(error_msg != NULL, "Must have error_msg");
 911     tty->print_cr("Got error: %s", error_msg);
 912     return -1;
 913   }
 914 
 915   // Pattern works - now check if it matches
 916   int result = m->matches(mh);
 917   delete m;
 918   assert(result == 0 || result == 1, "Result out of range");
 919   return result;
 920 WB_END
 921 
 922 static AlwaysFalseClosure always_false;
 923 
 924 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
 925   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 926   CHECK_JNI_EXCEPTION(env);
 927   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 928   MutexLockerEx mu(Compile_lock);
 929   MethodData* mdo = mh->method_data();
 930   MethodCounters* mcs = mh->method_counters();
 931 
 932   if (mdo != NULL) {
 933     mdo->init();
 934     ResourceMark rm;
 935     int arg_count = mdo->method()->size_of_parameters();
 936     for (int i = 0; i < arg_count; i++) {
 937       mdo->set_arg_modified(i, 0);
 938     }
 939     MutexLockerEx mu(mdo->extra_data_lock());
 940     mdo->clean_method_data(&always_false);
 941   }
 942 
 943   mh->clear_not_c1_compilable();
 944   mh->clear_not_c2_compilable();
 945   mh->clear_not_c2_osr_compilable();
 946   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
 947   if (mcs != NULL) {
 948     mcs->backedge_counter()->init();
 949     mcs->invocation_counter()->init();
 950     mcs->set_interpreter_invocation_count(0);
 951     mcs->set_interpreter_throwout_count(0);
 952 
 953 #ifdef TIERED
 954     mcs->set_rate(0.0F);
 955     mh->set_prev_event_count(0);
 956     mh->set_prev_time(0);
 957 #endif
 958   }
 959 WB_END
 960 
 961 template <typename T>
 962 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
 963   if (name == NULL) {
 964     return false;
 965   }
 966   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 967   const char* flag_name = env->GetStringUTFChars(name, NULL);
 968   CHECK_JNI_EXCEPTION_(env, false);
 969   Flag::Error result = (*TAt)(flag_name, value, true, true);
 970   env->ReleaseStringUTFChars(name, flag_name);
 971   return (result == Flag::SUCCESS);
 972 }
 973 
 974 template <typename T>
 975 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
 976   if (name == NULL) {
 977     return false;
 978   }
 979   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 980   const char* flag_name = env->GetStringUTFChars(name, NULL);
 981   CHECK_JNI_EXCEPTION_(env, false);
 982   Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
 983   env->ReleaseStringUTFChars(name, flag_name);
 984   return (result == Flag::SUCCESS);
 985 }
 986 
 987 template <typename T>
 988 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
 989   ResourceMark rm(thread);
 990   jclass clazz = env->FindClass(name->as_C_string());
 991   CHECK_JNI_EXCEPTION_(env, NULL);
 992   jmethodID methodID = env->GetStaticMethodID(clazz,
 993         vmSymbols::valueOf_name()->as_C_string(),
 994         sig->as_C_string());
 995   CHECK_JNI_EXCEPTION_(env, NULL);
 996   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
 997   CHECK_JNI_EXCEPTION_(env, NULL);
 998   return result;
 999 }
1000 
1001 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1002   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1003 }
1004 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1005   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1006 }
1007 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1008   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1009 }
1010 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1011   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1012 }*/
1013 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1014   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1015 }
1016 
1017 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1018   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1019   const char* flag_name = env->GetStringUTFChars(name, NULL);
1020   CHECK_JNI_EXCEPTION_(env, NULL);
1021   Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
1022   env->ReleaseStringUTFChars(name, flag_name);
1023   return result;
1024 }
1025 
1026 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1027   Flag* flag = getVMFlag(thread, env, name);
1028   return (flag != NULL) && flag->is_constant_in_binary();
1029 WB_END
1030 
1031 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1032   Flag* flag = getVMFlag(thread, env, name);
1033   return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
1034 WB_END
1035 
1036 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1037   bool result;
1038   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
1039     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1040     return booleanBox(thread, env, result);
1041   }
1042   return NULL;
1043 WB_END
1044 
1045 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1046   int result;
1047   if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
1048     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1049     return longBox(thread, env, result);
1050   }
1051   return NULL;
1052 WB_END
1053 
1054 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1055   uint result;
1056   if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
1057     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1058     return longBox(thread, env, result);
1059   }
1060   return NULL;
1061 WB_END
1062 
1063 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1064   intx result;
1065   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
1066     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1067     return longBox(thread, env, result);
1068   }
1069   return NULL;
1070 WB_END
1071 
1072 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1073   uintx result;
1074   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
1075     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1076     return longBox(thread, env, result);
1077   }
1078   return NULL;
1079 WB_END
1080 
1081 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1082   uint64_t result;
1083   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
1084     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1085     return longBox(thread, env, result);
1086   }
1087   return NULL;
1088 WB_END
1089 
1090 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1091   uintx result;
1092   if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
1093     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1094     return longBox(thread, env, result);
1095   }
1096   return NULL;
1097 WB_END
1098 
1099 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1100   double result;
1101   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
1102     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1103     return doubleBox(thread, env, result);
1104   }
1105   return NULL;
1106 WB_END
1107 
1108 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1109   ccstr ccstrResult;
1110   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
1111     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1112     jstring result = env->NewStringUTF(ccstrResult);
1113     CHECK_JNI_EXCEPTION_(env, NULL);
1114     return result;
1115   }
1116   return NULL;
1117 WB_END
1118 
1119 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1120   bool result = value == JNI_TRUE ? true : false;
1121   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
1122 WB_END
1123 
1124 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1125   int result = value;
1126   SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
1127 WB_END
1128 
1129 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1130   uint result = value;
1131   SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
1132 WB_END
1133 
1134 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1135   intx result = value;
1136   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
1137 WB_END
1138 
1139 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1140   uintx result = value;
1141   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
1142 WB_END
1143 
1144 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1145   uint64_t result = value;
1146   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
1147 WB_END
1148 
1149 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1150   size_t result = value;
1151   SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
1152 WB_END
1153 
1154 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1155   double result = value;
1156   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
1157 WB_END
1158 
1159 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1160   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1161   const char* ccstrValue;
1162   if (value == NULL) {
1163     ccstrValue = NULL;
1164   }
1165   else {
1166     ccstrValue = env->GetStringUTFChars(value, NULL);
1167     CHECK_JNI_EXCEPTION(env);
1168   }
1169   ccstr ccstrResult = ccstrValue;
1170   bool needFree;
1171   {
1172     ThreadInVMfromNative ttvfn(thread); // back to VM
1173     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
1174   }
1175   if (value != NULL) {
1176     env->ReleaseStringUTFChars(value, ccstrValue);
1177   }
1178   if (needFree) {
1179     FREE_C_HEAP_ARRAY(char, ccstrResult);
1180   }
1181 WB_END
1182 
1183 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1184   WhiteBox::compilation_locked = true;
1185 WB_END
1186 
1187 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1188   MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1189   WhiteBox::compilation_locked = false;
1190   mo.notify_all();
1191 WB_END
1192 
1193 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
1194   // Force a code cache sweep and block until it finished
1195   NMethodSweeper::force_sweep();
1196 WB_END
1197 
1198 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1199   ResourceMark rm(THREAD);
1200   int len;
1201   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1202   return (StringTable::lookup(name, len) != NULL);
1203 WB_END
1204 
1205 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1206   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
1207   Universe::heap()->collect(GCCause::_wb_full_gc);
1208 #if INCLUDE_ALL_GCS
1209   if (UseG1GC) {
1210     // Needs to be cleared explicitly for G1
1211     Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
1212   }
1213 #endif // INCLUDE_ALL_GCS
1214 WB_END
1215 
1216 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1217   Universe::heap()->collect(GCCause::_wb_young_gc);
1218 WB_END
1219 
1220 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1221   // static+volatile in order to force the read to happen
1222   // (not be eliminated by the compiler)
1223   static char c;
1224   static volatile char* p;
1225 
1226   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1227   if (p == NULL) {
1228     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1229   }
1230 
1231   c = *p;
1232 WB_END
1233 
1234 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1235   const char* features = VM_Version::features_string();
1236   ThreadToNativeFromVM ttn(thread);
1237   jstring features_string = env->NewStringUTF(features);
1238 
1239   CHECK_JNI_EXCEPTION_(env, NULL);
1240 
1241   return features_string;
1242 WB_END
1243 
1244 int WhiteBox::get_blob_type(const CodeBlob* code) {
1245   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1246   if (code->is_aot()) {
1247     return -1;
1248   }
1249   return CodeCache::get_code_heap(code)->code_blob_type();
1250 }
1251 
1252 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1253   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1254   return CodeCache::get_code_heap(blob_type);
1255 }
1256 
1257 struct CodeBlobStub {
1258   CodeBlobStub(const CodeBlob* blob) :
1259       name(os::strdup(blob->name())),
1260       size(blob->size()),
1261       blob_type(WhiteBox::get_blob_type(blob)),
1262       address((jlong) blob) { }
1263   ~CodeBlobStub() { os::free((void*) name); }
1264   const char* const name;
1265   const jint        size;
1266   const jint        blob_type;
1267   const jlong       address;
1268 };
1269 
1270 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1271   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1272   CHECK_JNI_EXCEPTION_(env, NULL);
1273   jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1274 
1275   jstring name = env->NewStringUTF(cb->name);
1276   CHECK_JNI_EXCEPTION_(env, NULL);
1277   env->SetObjectArrayElement(result, 0, name);
1278 
1279   jobject obj = integerBox(thread, env, cb->size);
1280   CHECK_JNI_EXCEPTION_(env, NULL);
1281   env->SetObjectArrayElement(result, 1, obj);
1282 
1283   obj = integerBox(thread, env, cb->blob_type);
1284   CHECK_JNI_EXCEPTION_(env, NULL);
1285   env->SetObjectArrayElement(result, 2, obj);
1286 
1287   obj = longBox(thread, env, cb->address);
1288   CHECK_JNI_EXCEPTION_(env, NULL);
1289   env->SetObjectArrayElement(result, 3, obj);
1290 
1291   return result;
1292 }
1293 
1294 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1295   ResourceMark rm(THREAD);
1296   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1297   CHECK_JNI_EXCEPTION_(env, NULL);
1298   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1299   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1300   jobjectArray result = NULL;
1301   if (code == NULL) {
1302     return result;
1303   }
1304   int comp_level = code->comp_level();
1305   int insts_size = comp_level == CompLevel_aot ? code->code_end() - code->code_begin() : code->insts_size();
1306 
1307   ThreadToNativeFromVM ttn(thread);
1308   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1309   CHECK_JNI_EXCEPTION_(env, NULL);
1310   result = env->NewObjectArray(5, clazz, NULL);
1311   if (result == NULL) {
1312     return result;
1313   }
1314 
1315   CodeBlobStub stub(code);
1316   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1317   CHECK_JNI_EXCEPTION_(env, NULL);
1318   env->SetObjectArrayElement(result, 0, codeBlob);
1319 
1320   jobject level = integerBox(thread, env, comp_level);
1321   CHECK_JNI_EXCEPTION_(env, NULL);
1322   env->SetObjectArrayElement(result, 1, level);
1323 
1324   jbyteArray insts = env->NewByteArray(insts_size);
1325   CHECK_JNI_EXCEPTION_(env, NULL);
1326   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1327   env->SetObjectArrayElement(result, 2, insts);
1328 
1329   jobject id = integerBox(thread, env, code->compile_id());
1330   CHECK_JNI_EXCEPTION_(env, NULL);
1331   env->SetObjectArrayElement(result, 3, id);
1332 
1333   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1334   CHECK_JNI_EXCEPTION_(env, NULL);
1335   env->SetObjectArrayElement(result, 4, entry_point);
1336 
1337   return result;
1338 WB_END
1339 
1340 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1341   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1342   BufferBlob* blob;
1343   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1344   if (full_size < size) {
1345     full_size += align_up(size - full_size, oopSize);
1346   }
1347   {
1348     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1349     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1350     ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1351   }
1352   // Track memory usage statistic after releasing CodeCache_lock
1353   MemoryService::track_code_cache_memory_usage();
1354   return blob;
1355 }
1356 
1357 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1358   if (size < 0) {
1359     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1360       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1361   }
1362   return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1363 WB_END
1364 
1365 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1366   if (addr == 0) {
1367     return;
1368   }
1369   BufferBlob::free((BufferBlob*) addr);
1370 WB_END
1371 
1372 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1373   ResourceMark rm;
1374   GrowableArray<CodeBlobStub*> blobs;
1375   {
1376     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1377     CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1378     if (heap == NULL) {
1379       return NULL;
1380     }
1381     for (CodeBlob* cb = (CodeBlob*) heap->first();
1382          cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1383       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1384       new (stub) CodeBlobStub(cb);
1385       blobs.append(stub);
1386     }
1387   }
1388   if (blobs.length() == 0) {
1389     return NULL;
1390   }
1391   ThreadToNativeFromVM ttn(thread);
1392   jobjectArray result = NULL;
1393   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1394   CHECK_JNI_EXCEPTION_(env, NULL);
1395   result = env->NewObjectArray(blobs.length(), clazz, NULL);
1396   CHECK_JNI_EXCEPTION_(env, NULL);
1397   if (result == NULL) {
1398     return result;
1399   }
1400   int i = 0;
1401   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1402        it != blobs.end(); ++it) {
1403     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1404     CHECK_JNI_EXCEPTION_(env, NULL);
1405     env->SetObjectArrayElement(result, i, obj);
1406     CHECK_JNI_EXCEPTION_(env, NULL);
1407     ++i;
1408   }
1409   return result;
1410 WB_END
1411 
1412 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1413   return CompileBroker::get_compilation_activity_mode();
1414 WB_END
1415 
1416 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1417   if (addr == 0) {
1418     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1419       "WB_GetCodeBlob: addr is null");
1420   }
1421   ThreadToNativeFromVM ttn(thread);
1422   CodeBlobStub stub((CodeBlob*) addr);
1423   return codeBlob2objectArray(thread, env, &stub);
1424 WB_END
1425 
1426 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1427   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1428   CHECK_JNI_EXCEPTION_(env, 0);
1429   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1430   return (jlong) mh->method_data();
1431 WB_END
1432 
1433 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1434   return (jlong) Thread::current()->stack_size();
1435 WB_END
1436 
1437 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1438   JavaThread* t = JavaThread::current();
1439   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1440 WB_END
1441 
1442 
1443 int WhiteBox::array_bytes_to_length(size_t bytes) {
1444   return Array<u1>::bytes_to_length(bytes);
1445 }
1446 
1447 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1448   if (size < 0) {
1449     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1450         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1451   }
1452 
1453   oop class_loader_oop = JNIHandles::resolve(class_loader);
1454   ClassLoaderData* cld = class_loader_oop != NULL
1455       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1456       : ClassLoaderData::the_null_class_loader_data();
1457 
1458   void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1459 
1460   return (jlong)(uintptr_t)metadata;
1461 WB_END
1462 
1463 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1464   oop class_loader_oop = JNIHandles::resolve(class_loader);
1465   ClassLoaderData* cld = class_loader_oop != NULL
1466       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1467       : ClassLoaderData::the_null_class_loader_data();
1468 
1469   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1470 WB_END
1471 
1472 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1473                                 jstring version, jstring location, jobjectArray packages))
1474   ResourceMark rm(THREAD);
1475 
1476   objArrayOop packages_oop = objArrayOop(JNIHandles::resolve(packages));
1477   objArrayHandle packages_h(THREAD, packages_oop);
1478   int num_packages = (packages_h == NULL ? 0 : packages_h->length());
1479 
1480   char** pkgs = NULL;
1481   if (num_packages > 0) {
1482     pkgs = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char*, num_packages);
1483     for (int x = 0; x < num_packages; x++) {
1484       oop pkg_str = packages_h->obj_at(x);
1485       if (pkg_str == NULL || !pkg_str->is_a(SystemDictionary::String_klass())) {
1486         THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1487                   err_msg("Bad package name"));
1488       }
1489       pkgs[x] = java_lang_String::as_utf8_string(pkg_str);
1490     }
1491   }
1492   Modules::define_module(module, is_open, version, location, (const char* const*)pkgs, num_packages, CHECK);
1493 WB_END
1494 
1495 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1496   ResourceMark rm(THREAD);
1497   char* package_name = NULL;
1498   if (package != NULL) {
1499       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1500   }
1501   Modules::add_module_exports_qualified(from_module, package_name, to_module, CHECK);
1502 WB_END
1503 
1504 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1505   ResourceMark rm(THREAD);
1506   char* package_name = NULL;
1507   if (package != NULL) {
1508       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1509   }
1510   Modules::add_module_exports_to_all_unnamed(module, package_name, CHECK);
1511 WB_END
1512 
1513 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1514   ResourceMark rm(THREAD);
1515   char* package_name = NULL;
1516   if (package != NULL) {
1517       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1518   }
1519   Modules::add_module_exports(module, package_name, NULL, CHECK);
1520 WB_END
1521 
1522 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1523   Modules::add_reads_module(from_module, source_module, CHECK);
1524 WB_END
1525 
1526 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1527   if (inc < 0) {
1528     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1529         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1530   }
1531 
1532   jlong max_size_t = (jlong) ((size_t) -1);
1533   if (inc > max_size_t) {
1534     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1535         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1536   }
1537 
1538   size_t new_cap_until_GC = 0;
1539   size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1540   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1541   if (!success) {
1542     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1543                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1544                 "due to contention with another thread");
1545   }
1546   return (jlong) new_cap_until_GC;
1547 WB_END
1548 
1549 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1550   return (jlong) MetaspaceGC::capacity_until_GC();
1551 WB_END
1552 
1553 WB_ENTRY(jboolean, WB_MetaspaceShouldConcurrentCollect(JNIEnv* env, jobject wb))
1554   return MetaspaceGC::should_concurrent_collect();
1555 WB_END
1556 
1557 WB_ENTRY(jlong, WB_MetaspaceReserveAlignment(JNIEnv* env, jobject wb))
1558   return (jlong)Metaspace::reserve_alignment();
1559 WB_END
1560 
1561 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1562   Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1563                                            Monitor::_safepoint_check_always :
1564                                            Monitor::_safepoint_check_never;
1565   MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1566                    attemptedNoSafepointValue == JNI_TRUE);
1567 WB_END
1568 
1569 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1570   oop obj_oop = JNIHandles::resolve(obj);
1571   return (jboolean) obj_oop->mark()->has_monitor();
1572 WB_END
1573 
1574 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1575   VM_ForceSafepoint force_safepoint_op;
1576   VMThread::execute(&force_safepoint_op);
1577 WB_END
1578 
1579 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1580   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1581   return (jlong) ik->constants();
1582 WB_END
1583 
1584 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1585   return ConstantPool::CPCACHE_INDEX_TAG;
1586 WB_END
1587 
1588 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1589   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1590   ConstantPool* cp = ik->constants();
1591   if (cp->cache() == NULL) {
1592       return -1;
1593   }
1594   return cp->cache()->length();
1595 WB_END
1596 
1597 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1598   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1599   ConstantPool* cp = ik->constants();
1600   if (cp->cache() == NULL) {
1601     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1602   }
1603   jint cpci = index;
1604   jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1605   if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1606     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1607   }
1608   jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1609   return cpi;
1610 WB_END
1611 
1612 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1613   return ConstantPool::encode_invokedynamic_index(index);
1614 WB_END
1615 
1616 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1617   VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1618   VMThread::execute(&clear_ics);
1619 WB_END
1620 
1621 template <typename T>
1622 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1623   assert(value != NULL, "sanity");
1624   if (method == NULL || name == NULL) {
1625     return false;
1626   }
1627   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1628   CHECK_JNI_EXCEPTION_(env, false);
1629   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1630   // can't be in VM when we call JNI
1631   ThreadToNativeFromVM ttnfv(thread);
1632   const char* flag_name = env->GetStringUTFChars(name, NULL);
1633   CHECK_JNI_EXCEPTION_(env, false);
1634   bool result =  CompilerOracle::has_option_value(mh, flag_name, *value);
1635   env->ReleaseStringUTFChars(name, flag_name);
1636   return result;
1637 }
1638 
1639 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1640   bool result;
1641   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1642     // can't be in VM when we call JNI
1643     ThreadToNativeFromVM ttnfv(thread);
1644     return booleanBox(thread, env, result);
1645   }
1646   return NULL;
1647 WB_END
1648 
1649 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1650   intx result;
1651   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1652     // can't be in VM when we call JNI
1653     ThreadToNativeFromVM ttnfv(thread);
1654     return longBox(thread, env, result);
1655   }
1656   return NULL;
1657 WB_END
1658 
1659 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1660   uintx result;
1661   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1662     // can't be in VM when we call JNI
1663     ThreadToNativeFromVM ttnfv(thread);
1664     return longBox(thread, env, result);
1665   }
1666   return NULL;
1667 WB_END
1668 
1669 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1670   double result;
1671   if (GetMethodOption <double> (thread, env, method, name, &result)) {
1672     // can't be in VM when we call JNI
1673     ThreadToNativeFromVM ttnfv(thread);
1674     return doubleBox(thread, env, result);
1675   }
1676   return NULL;
1677 WB_END
1678 
1679 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1680   ccstr ccstrResult;
1681   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1682     // can't be in VM when we call JNI
1683     ThreadToNativeFromVM ttnfv(thread);
1684     jstring result = env->NewStringUTF(ccstrResult);
1685     CHECK_JNI_EXCEPTION_(env, NULL);
1686     return result;
1687   }
1688   return NULL;
1689 WB_END
1690 
1691 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1692   oop obj_oop = JNIHandles::resolve(obj);
1693   return oopDesc::is_archive_object(obj_oop);
1694 WB_END
1695 
1696 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1697   return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1698 WB_END
1699 
1700 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1701   return !StringTable::shared_string_mapped();
1702 WB_END
1703 
1704 WB_ENTRY(jobject, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass clazz))
1705   Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1706   if (k->is_instance_klass()) {
1707     InstanceKlass *ik = InstanceKlass::cast(k);
1708     ConstantPool *cp = ik->constants();
1709     objArrayOop refs =  cp->resolved_references();
1710     return (jobject)JNIHandles::make_local(env, refs);
1711   } else {
1712     return NULL;
1713   }
1714 WB_END
1715 
1716 WB_ENTRY(jboolean, WB_IsCDSIncludedInVmBuild(JNIEnv* env))
1717 #if INCLUDE_CDS
1718   return true;
1719 #else
1720   return false;
1721 #endif
1722 WB_END
1723 
1724 //Some convenience methods to deal with objects from java
1725 int WhiteBox::offset_for_field(const char* field_name, oop object,
1726     Symbol* signature_symbol) {
1727   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1728   Thread* THREAD = Thread::current();
1729 
1730   //Get the class of our object
1731   Klass* arg_klass = object->klass();
1732   //Turn it into an instance-klass
1733   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1734 
1735   //Create symbols to look for in the class
1736   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1737       THREAD);
1738 
1739   //To be filled in with an offset of the field we're looking for
1740   fieldDescriptor fd;
1741 
1742   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1743   if (res == NULL) {
1744     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1745         name_symbol->as_C_string());
1746     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
1747   }
1748 
1749   //fetch the field at the offset we've found
1750   int dest_offset = fd.offset();
1751 
1752   return dest_offset;
1753 }
1754 
1755 
1756 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1757   int offset = offset_for_field(field_name, object,
1758       vmSymbols::string_signature());
1759   oop string = object->obj_field(offset);
1760   if (string == NULL) {
1761     return NULL;
1762   }
1763   const char* ret = java_lang_String::as_utf8_string(string);
1764   return ret;
1765 }
1766 
1767 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1768   int offset =
1769       offset_for_field(field_name, object, vmSymbols::bool_signature());
1770   bool ret = (object->bool_field(offset) == JNI_TRUE);
1771   return ret;
1772 }
1773 
1774 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1775   ResourceMark rm;
1776   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1777 
1778   //  one by one registration natives for exception catching
1779   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1780   CHECK_JNI_EXCEPTION(env);
1781   for (int i = 0, n = method_count; i < n; ++i) {
1782     // Skip dummy entries
1783     if (method_array[i].fnPtr == NULL) continue;
1784     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1785       jthrowable throwable_obj = env->ExceptionOccurred();
1786       if (throwable_obj != NULL) {
1787         env->ExceptionClear();
1788         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1789           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1790           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1791           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1792               method_array[i].name, method_array[i].signature);
1793         }
1794       } else {
1795         // Registration failed unexpectedly.
1796         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1797             method_array[i].name, method_array[i].signature);
1798         env->UnregisterNatives(wbclass);
1799         break;
1800       }
1801     }
1802   }
1803 }
1804 
1805 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
1806   // can't be in VM when we call JNI
1807   ThreadToNativeFromVM ttnfv(thread);
1808   const char* dir = env->GetStringUTFChars(compDirect, NULL);
1809   CHECK_JNI_EXCEPTION_(env, 0);
1810   int ret;
1811   {
1812     ThreadInVMfromNative ttvfn(thread); // back to VM
1813     ret = DirectivesParser::parse_string(dir, tty);
1814   }
1815   env->ReleaseStringUTFChars(compDirect, dir);
1816   // -1 for error parsing directive. Return 0 as number of directives added.
1817   if (ret == -1) {
1818     ret = 0;
1819   }
1820   return (jint) ret;
1821 WB_END
1822 
1823 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
1824   DirectivesStack::pop(count);
1825 WB_END
1826 
1827 #define CC (char*)
1828 
1829 static JNINativeMethod methods[] = {
1830   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
1831   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
1832   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
1833   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
1834   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
1835   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
1836   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
1837   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
1838   {CC"getHeapAlignment",                 CC"()J",                   (void*)&WB_GetHeapAlignment},
1839   {CC"isClassAlive0",                    CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
1840   {CC"parseCommandLine0",
1841       CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1842       (void*) &WB_ParseCommandLine
1843   },
1844   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1845                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
1846   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
1847                                                       (void*)&WB_AddToSystemClassLoaderSearch},
1848   {CC"getCompressedOopsMaxHeapSize", CC"()J",
1849       (void*)&WB_GetCompressedOopsMaxHeapSize},
1850   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
1851   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
1852   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
1853   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
1854 #if INCLUDE_ALL_GCS
1855   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
1856   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
1857   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
1858   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
1859   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
1860   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
1861   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
1862   {CC"g1StartConcMarkCycle",       CC"()Z",           (void*)&WB_G1StartMarkCycle  },
1863   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1864                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
1865   {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
1866   {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
1867   {CC"g1GetMixedGCInfo",   CC"(I)[J",                 (void*)&WB_G1GetMixedGCInfo },
1868 #endif // INCLUDE_ALL_GCS
1869 #if INCLUDE_NMT
1870   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
1871   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
1872   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
1873   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
1874   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
1875   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
1876   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
1877   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
1878   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
1879 #endif // INCLUDE_NMT
1880   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
1881   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
1882   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
1883                                                       (void*)&WB_DeoptimizeMethod  },
1884   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
1885                                                       (void*)&WB_IsMethodCompiled  },
1886   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1887                                                       (void*)&WB_IsMethodCompilable},
1888   {CC"isMethodQueuedForCompilation0",
1889       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
1890   {CC"isIntrinsicAvailable0",
1891       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1892                                                       (void*)&WB_IsIntrinsicAvailable},
1893   {CC"makeMethodNotCompilable0",
1894       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
1895   {CC"testSetDontInlineMethod0",
1896       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
1897   {CC"getMethodCompilationLevel0",
1898       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
1899   {CC"getMethodEntryBci0",
1900       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
1901   {CC"getCompileQueueSize",
1902       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
1903   {CC"testSetForceInlineMethod0",
1904       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
1905   {CC"enqueueMethodForCompilation0",
1906       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
1907   {CC"enqueueInitializerForCompilation0",
1908       CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
1909   {CC"clearMethodState0",
1910       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
1911   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
1912   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
1913   {CC"matchesMethod",
1914       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1915                                                       (void*)&WB_MatchesMethod},
1916   {CC"matchesInline",
1917       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1918                                                       (void*)&WB_MatchesInline},
1919   {CC"shouldPrintAssembly",
1920         CC"(Ljava/lang/reflect/Executable;I)Z",
1921                                                         (void*)&WB_ShouldPrintAssembly},
1922 
1923   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1924   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1925   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1926   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1927   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1928   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1929   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1930   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1931   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1932   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1933   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
1934                                                       (void*)&WB_SetStringVMFlag},
1935   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1936                                                       (void*)&WB_GetBooleanVMFlag},
1937   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
1938                                                       (void*)&WB_GetIntVMFlag},
1939   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1940                                                       (void*)&WB_GetUintVMFlag},
1941   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1942                                                       (void*)&WB_GetIntxVMFlag},
1943   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1944                                                       (void*)&WB_GetUintxVMFlag},
1945   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
1946                                                       (void*)&WB_GetUint64VMFlag},
1947   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1948                                                       (void*)&WB_GetSizeTVMFlag},
1949   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
1950                                                       (void*)&WB_GetDoubleVMFlag},
1951   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
1952                                                       (void*)&WB_GetStringVMFlag},
1953   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
1954   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
1955   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
1956   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
1957   {CC"allocateMetaspace",
1958      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
1959   {CC"freeMetaspace",
1960      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
1961   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
1962   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
1963   {CC"metaspaceShouldConcurrentCollect", CC"()Z",     (void*)&WB_MetaspaceShouldConcurrentCollect },
1964   {CC"metaspaceReserveAlignment", CC"()J",            (void*)&WB_MetaspaceReserveAlignment },
1965   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
1966   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1967                                                       (void*)&WB_GetNMethod         },
1968   {CC"forceNMethodSweep",  CC"()V",                   (void*)&WB_ForceNMethodSweep  },
1969   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
1970   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
1971   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1972   {CC"getCompilationActivityMode",
1973                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
1974   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
1975                                                       (void*)&WB_GetMethodData      },
1976   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
1977   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
1978   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
1979   {CC"DefineModule",       CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
1980                                                       (void*)&WB_DefineModule },
1981   {CC"AddModuleExports",   CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
1982                                                       (void*)&WB_AddModuleExports },
1983   {CC"AddReadsModule",     CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
1984                                                       (void*)&WB_AddReadsModule },
1985   {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1986                                                       (void*)&WB_AddModuleExportsToAllUnnamed },
1987   {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1988                                                       (void*)&WB_AddModuleExportsToAll },
1989   {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
1990   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
1991   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
1992   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
1993   {CC"getConstantPoolCacheIndexTag0", CC"()I",  (void*)&WB_GetConstantPoolCacheIndexTag},
1994   {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_GetConstantPoolCacheLength},
1995   {CC"remapInstructionOperandFromCPCache0",
1996       CC"(Ljava/lang/Class;I)I",                      (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
1997   {CC"encodeConstantPoolIndyIndex0",
1998       CC"(I)I",                      (void*)&WB_ConstantPoolEncodeIndyIndex},
1999   {CC"getMethodBooleanOption",
2000       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
2001                                                       (void*)&WB_GetMethodBooleaneOption},
2002   {CC"getMethodIntxOption",
2003       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2004                                                       (void*)&WB_GetMethodIntxOption},
2005   {CC"getMethodUintxOption",
2006       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2007                                                       (void*)&WB_GetMethodUintxOption},
2008   {CC"getMethodDoubleOption",
2009       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
2010                                                       (void*)&WB_GetMethodDoubleOption},
2011   {CC"getMethodStringOption",
2012       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
2013                                                       (void*)&WB_GetMethodStringOption},
2014   {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
2015   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
2016   {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
2017   {CC"getResolvedReferences", CC"(Ljava/lang/Class;)Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
2018   {CC"isCDSIncludedInVmBuild",            CC"()Z",    (void*)&WB_IsCDSIncludedInVmBuild },
2019   {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
2020   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
2021                                                       (void*)&WB_AddCompilerDirective },
2022   {CC"removeCompilerDirective",   CC"(I)V",             (void*)&WB_RemoveCompilerDirective },
2023   {CC"currentGC",                 CC"()I",            (void*)&WB_CurrentGC},
2024   {CC"allSupportedGC",            CC"()I",            (void*)&WB_AllSupportedGC},
2025   {CC"gcSelectedByErgo",          CC"()Z",            (void*)&WB_GCSelectedByErgo},
2026   {CC"supportsConcurrentGCPhaseControl", CC"()Z",     (void*)&WB_SupportsConcurrentGCPhaseControl},
2027   {CC"getConcurrentGCPhases",     CC"()[Ljava/lang/String;",
2028                                                       (void*)&WB_GetConcurrentGCPhases},
2029   {CC"requestConcurrentGCPhase0", CC"(Ljava/lang/String;)Z",
2030                                                       (void*)&WB_RequestConcurrentGCPhase},
2031 };
2032 
2033 #undef CC
2034 
2035 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
2036   {
2037     if (WhiteBoxAPI) {
2038       // Make sure that wbclass is loaded by the null classloader
2039       InstanceKlass* ik = InstanceKlass::cast(JNIHandles::resolve(wbclass)->klass());
2040       Handle loader(THREAD, ik->class_loader());
2041       if (loader.is_null()) {
2042         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
2043         WhiteBox::register_extended(env, wbclass, thread);
2044         WhiteBox::set_used();
2045       }
2046     }
2047   }
2048 JVM_END