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/vm_version.hpp"
  58 #include "utilities/align.hpp"
  59 #include "utilities/debug.hpp"
  60 #include "utilities/exceptions.hpp"
  61 #include "utilities/macros.hpp"
  62 #if INCLUDE_ALL_GCS
  63 #include "gc/g1/concurrentMarkThread.hpp"
  64 #include "gc/g1/g1CollectedHeap.inline.hpp"
  65 #include "gc/g1/g1ConcurrentMark.hpp"
  66 #include "gc/g1/heapRegionRemSet.hpp"
  67 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
  68 #include "gc/parallel/adjoiningGenerations.hpp"
  69 #endif // INCLUDE_ALL_GCS
  70 #if INCLUDE_NMT
  71 #include "services/mallocSiteTable.hpp"
  72 #include "services/memTracker.hpp"
  73 #include "utilities/nativeCallStack.hpp"
  74 #endif // INCLUDE_NMT
  75 
  76 #ifdef LINUX
  77 #include "utilities/elfFile.hpp"
  78 #endif
  79 
  80 
  81 #define SIZE_T_MAX_VALUE ((size_t) -1)
  82 
  83 bool WhiteBox::_used = false;
  84 volatile bool WhiteBox::compilation_locked = false;
  85 
  86 class VM_WhiteBoxOperation : public VM_Operation {
  87  public:
  88   VM_WhiteBoxOperation()                         { }
  89   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
  90   bool allow_nested_vm_operations() const        { return true; }
  91 };
  92 
  93 
  94 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  95   return (jlong)(void*)JNIHandles::resolve(obj);
  96 WB_END
  97 
  98 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  99   return heapOopSize;
 100 WB_END
 101 
 102 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
 103   return os::vm_page_size();
 104 WB_END
 105 
 106 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
 107   return os::vm_allocation_granularity();
 108 WB_END
 109 
 110 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
 111   return os::large_page_size();
 112 WB_END
 113 
 114 class WBIsKlassAliveClosure : public KlassClosure {
 115     Symbol* _name;
 116     bool _found;
 117 public:
 118     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
 119 
 120     void do_klass(Klass* k) {
 121       if (_found) return;
 122       Symbol* ksym = k->name();
 123       if (ksym->fast_compare(_name) == 0) {
 124         _found = true;
 125       }
 126     }
 127 
 128     bool found() const {
 129         return _found;
 130     }
 131 };
 132 
 133 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
 134   oop h_name = JNIHandles::resolve(name);
 135   if (h_name == NULL) return false;
 136   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
 137   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 138 
 139   WBIsKlassAliveClosure closure(sym);
 140   ClassLoaderDataGraph::classes_do(&closure);
 141 
 142   return closure.found();
 143 WB_END
 144 
 145 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 146 #if INCLUDE_JVMTI
 147   ResourceMark rm;
 148   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 149   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 150   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 151   assert(err == JVMTI_ERROR_NONE, "must not fail");
 152 #endif
 153 }
 154 WB_END
 155 
 156 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 157 #if INCLUDE_JVMTI
 158   ResourceMark rm;
 159   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 160   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 161   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 162   assert(err == JVMTI_ERROR_NONE, "must not fail");
 163 #endif
 164 }
 165 WB_END
 166 
 167 
 168 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 169   return (jlong)Arguments::max_heap_for_compressed_oops();
 170 }
 171 WB_END
 172 
 173 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 174   CollectorPolicy * p = Universe::heap()->collector_policy();
 175   tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
 176     SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
 177     p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
 178     p->space_alignment(), p->heap_alignment());
 179 }
 180 WB_END
 181 
 182 #ifndef PRODUCT
 183 // Forward declaration
 184 void TestReservedSpace_test();
 185 void TestReserveMemorySpecial_test();
 186 void TestVirtualSpace_test();
 187 void TestMetaspaceAux_test();
 188 #endif
 189 
 190 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 191 #ifndef PRODUCT
 192   TestReservedSpace_test();
 193   TestReserveMemorySpecial_test();
 194   TestVirtualSpace_test();
 195   TestMetaspaceAux_test();
 196 #endif
 197 WB_END
 198 
 199 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 200   size_t granularity = os::vm_allocation_granularity();
 201   ReservedHeapSpace rhs(100 * granularity, granularity, false);
 202   VirtualSpace vs;
 203   vs.initialize(rhs, 50 * granularity);
 204 
 205   // Check if constraints are complied
 206   if (!( UseCompressedOops && rhs.base() != NULL &&
 207          Universe::narrow_oop_base() != NULL &&
 208          Universe::narrow_oop_use_implicit_null_checks() )) {
 209     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 210                   "\tUseCompressedOops is %d\n"
 211                   "\trhs.base() is " PTR_FORMAT "\n"
 212                   "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
 213                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
 214                   UseCompressedOops,
 215                   p2i(rhs.base()),
 216                   p2i(Universe::narrow_oop_base()),
 217                   Universe::narrow_oop_use_implicit_null_checks());
 218     return;
 219   }
 220   tty->print_cr("Reading from no access area... ");
 221   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 222                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 223 WB_END
 224 
 225 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 226                                            size_t magnitude, size_t iterations) {
 227   size_t granularity = os::vm_allocation_granularity();
 228   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
 229   VirtualSpace vs;
 230   if (!vs.initialize(rhs, 0)) {
 231     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 232     return 3;
 233   }
 234 
 235   int seed = os::random();
 236   tty->print_cr("Random seed is %d", seed);
 237   os::init_random(seed);
 238 
 239   for (size_t i = 0; i < iterations; i++) {
 240 
 241     // Whether we will shrink or grow
 242     bool shrink = os::random() % 2L == 0;
 243 
 244     // Get random delta to resize virtual space
 245     size_t delta = (size_t)os::random() % magnitude;
 246 
 247     // If we are about to shrink virtual space below zero, then expand instead
 248     if (shrink && vs.committed_size() < delta) {
 249       shrink = false;
 250     }
 251 
 252     // Resizing by delta
 253     if (shrink) {
 254       vs.shrink_by(delta);
 255     } else {
 256       // If expanding fails expand_by will silently return false
 257       vs.expand_by(delta, true);
 258     }
 259   }
 260   return 0;
 261 }
 262 
 263 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 264         jlong reserved_space_size, jlong magnitude, jlong iterations))
 265   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 266                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 267                 iterations);
 268   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 269     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 270     return 1;
 271   }
 272 
 273   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 274   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 275   if (sizeof(size_t) < sizeof(jlong)) {
 276     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 277     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 278         || iterations > size_t_max_value) {
 279       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 280       return 2;
 281     }
 282   }
 283 
 284   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 285                                         (size_t) magnitude, (size_t) iterations);
 286 WB_END
 287 
 288 static const jint serial_code   = 1;
 289 static const jint parallel_code = 2;
 290 static const jint cms_code      = 4;
 291 static const jint g1_code       = 8;
 292 
 293 WB_ENTRY(jint, WB_CurrentGC(JNIEnv* env, jobject o, jobject obj))
 294   if (UseSerialGC) {
 295     return serial_code;
 296   } else if (UseParallelGC || UseParallelOldGC) {
 297     return parallel_code;
 298   } if (UseConcMarkSweepGC) {
 299     return cms_code;
 300   } else if (UseG1GC) {
 301     return g1_code;
 302   }
 303   ShouldNotReachHere();
 304   return 0;
 305 WB_END
 306 
 307 WB_ENTRY(jint, WB_AllSupportedGC(JNIEnv* env, jobject o, jobject obj))
 308 #if INCLUDE_ALL_GCS
 309   return serial_code | parallel_code | cms_code | g1_code;
 310 #else
 311   return serial_code;
 312 #endif // INCLUDE_ALL_GCS
 313 WB_END
 314 
 315 WB_ENTRY(jboolean, WB_GCSelectedByErgo(JNIEnv* env, jobject o, jobject obj))
 316   if (UseSerialGC) {
 317     return FLAG_IS_ERGO(UseSerialGC);
 318   } else if (UseParallelGC) {
 319     return FLAG_IS_ERGO(UseParallelGC);
 320   } else if (UseParallelOldGC) {
 321     return FLAG_IS_ERGO(UseParallelOldGC);
 322   } else if (UseConcMarkSweepGC) {
 323     return FLAG_IS_ERGO(UseConcMarkSweepGC);
 324   } else if (UseG1GC) {
 325     return FLAG_IS_ERGO(UseG1GC);
 326   }
 327   ShouldNotReachHere();
 328   return false;
 329 WB_END
 330 
 331 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 332   oop p = JNIHandles::resolve(obj);
 333 #if INCLUDE_ALL_GCS
 334   if (UseG1GC) {
 335     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 336     const HeapRegion* hr = g1->heap_region_containing(p);
 337     if (hr == NULL) {
 338       return false;
 339     }
 340     return !(hr->is_young());
 341   } else if (UseParallelGC) {
 342     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 343     return !psh->is_in_young(p);
 344   }
 345 #endif // INCLUDE_ALL_GCS
 346   GenCollectedHeap* gch = GenCollectedHeap::heap();
 347   return !gch->is_in_young(p);
 348 WB_END
 349 
 350 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 351   oop p = JNIHandles::resolve(obj);
 352   return p->size() * HeapWordSize;
 353 WB_END
 354 
 355 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 356   size_t alignment = Universe::heap()->collector_policy()->space_alignment();
 357   return (jlong)alignment;
 358 WB_END
 359 
 360 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
 361   size_t alignment = Universe::heap()->collector_policy()->heap_alignment();
 362   return (jlong)alignment;
 363 WB_END
 364 
 365 WB_ENTRY(jboolean, WB_SupportsConcurrentGCPhaseControl(JNIEnv* env, jobject o))
 366   return Universe::heap()->supports_concurrent_phase_control();
 367 WB_END
 368 
 369 WB_ENTRY(jobjectArray, WB_GetConcurrentGCPhases(JNIEnv* env, jobject o))
 370   const char* const* phases = Universe::heap()->concurrent_phases();
 371   jint nphases = 0;
 372   for ( ; phases[nphases] != NULL; ++nphases) ;
 373 
 374   ResourceMark rm(thread);
 375   ThreadToNativeFromVM ttn(thread);
 376   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
 377   CHECK_JNI_EXCEPTION_(env, NULL);
 378 
 379   jobjectArray result = env->NewObjectArray(nphases, clazz, NULL);
 380   CHECK_JNI_EXCEPTION_(env, NULL);
 381 
 382   // If push fails, return with pending exception.
 383   if (env->PushLocalFrame(nphases) < 0) return NULL;
 384   for (jint i = 0; i < nphases; ++i) {
 385     jstring phase = env->NewStringUTF(phases[i]);
 386     CHECK_JNI_EXCEPTION_(env, NULL);
 387     env->SetObjectArrayElement(result, i, phase);
 388     CHECK_JNI_EXCEPTION_(env, NULL);
 389   }
 390   env->PopLocalFrame(NULL);
 391 
 392   return result;
 393 WB_END
 394 
 395 WB_ENTRY(jboolean, WB_RequestConcurrentGCPhase(JNIEnv* env, jobject o, jstring name))
 396   Handle h_name(THREAD, JNIHandles::resolve(name));
 397   ResourceMark rm;
 398   const char* c_name = java_lang_String::as_utf8_string(h_name());
 399   return Universe::heap()->request_concurrent_phase(c_name);
 400 WB_END
 401 
 402 #if INCLUDE_ALL_GCS
 403 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 404   if (UseG1GC) {
 405     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 406     oop result = JNIHandles::resolve(obj);
 407     const HeapRegion* hr = g1->heap_region_containing(result);
 408     return hr->is_humongous();
 409   }
 410   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
 411 WB_END
 412 
 413 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 414   if (UseG1GC) {
 415     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 416     const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 417     return hr->is_humongous();
 418   }
 419   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
 420 WB_END
 421 
 422 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 423   if (UseG1GC) {
 424     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 425     const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 426     return hr->is_free();
 427   }
 428   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
 429 WB_END
 430 
 431 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 432   if (UseG1GC) {
 433     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 434     size_t nr = g1->max_regions();
 435     return (jlong)nr;
 436   }
 437   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
 438 WB_END
 439 
 440 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 441   if (UseG1GC) {
 442     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 443     size_t nr = g1->num_free_regions();
 444     return (jlong)nr;
 445   }
 446   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
 447 WB_END
 448 
 449 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 450   if (UseG1GC) {
 451     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 452     return g1h->concurrent_mark()->cmThread()->during_cycle();
 453   }
 454   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
 455 WB_END
 456 
 457 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
 458   if (UseG1GC) {
 459     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 460     if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
 461       g1h->collect(GCCause::_wb_conc_mark);
 462       return true;
 463     }
 464     return false;
 465   }
 466   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1StartMarkCycle: G1 GC is not enabled");
 467 WB_END
 468 
 469 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 470   if (UseG1GC) {
 471     return (jint)HeapRegion::GrainBytes;
 472   }
 473   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
 474 WB_END
 475 
 476 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
 477 #if INCLUDE_ALL_GCS
 478   if (UseParallelGC) {
 479     return ParallelScavengeHeap::heap()->gens()->virtual_spaces()->alignment();
 480   }
 481 #endif // INCLUDE_ALL_GCS
 482   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
 483 WB_END
 484 
 485 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
 486 #if INCLUDE_ALL_GCS
 487   if (UseParallelGC) {
 488     return ParallelScavengeHeap::heap()->generation_alignment();
 489   }
 490 #endif // INCLUDE_ALL_GCS
 491   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
 492 WB_END
 493 
 494 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 495 #if INCLUDE_ALL_GCS
 496   if (UseG1GC) {
 497     ResourceMark rm(THREAD);
 498     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 499     MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 500     Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 501     return JNIHandles::make_local(env, h());
 502   }
 503 #endif // INCLUDE_ALL_GCS
 504   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
 505 WB_END
 506 
 507 class OldRegionsLivenessClosure: public HeapRegionClosure {
 508 
 509  private:
 510   const int _liveness;
 511   size_t _total_count;
 512   size_t _total_memory;
 513   size_t _total_memory_to_free;
 514 
 515  public:
 516   OldRegionsLivenessClosure(int liveness) :
 517     _liveness(liveness),
 518     _total_count(0),
 519     _total_memory(0),
 520     _total_memory_to_free(0) { }
 521 
 522     size_t total_count() { return _total_count; }
 523     size_t total_memory() { return _total_memory; }
 524     size_t total_memory_to_free() { return _total_memory_to_free; }
 525 
 526   bool doHeapRegion(HeapRegion* r) {
 527     if (r->is_old()) {
 528       size_t prev_live = r->marked_bytes();
 529       size_t live = r->live_bytes();
 530       size_t size = r->used();
 531       size_t reg_size = HeapRegion::GrainBytes;
 532       if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
 533         _total_memory += size;
 534         ++_total_count;
 535         if (size == reg_size) {
 536         // we don't include non-full regions since they are unlikely included in mixed gc
 537         // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
 538           _total_memory_to_free += size - prev_live;
 539         }
 540       }
 541     }
 542     return false;
 543   }
 544 };
 545 
 546 
 547 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
 548   if (!UseG1GC) {
 549     THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
 550   }
 551   if (liveness < 0) {
 552     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
 553   }
 554 
 555   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 556   OldRegionsLivenessClosure rli(liveness);
 557   g1h->heap_region_iterate(&rli);
 558 
 559   typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
 560   result->long_at_put(0, rli.total_count());
 561   result->long_at_put(1, rli.total_memory());
 562   result->long_at_put(2, rli.total_memory_to_free());
 563   return (jlongArray) JNIHandles::make_local(env, result);
 564 WB_END
 565 
 566 #endif // INCLUDE_ALL_GCS
 567 
 568 #if INCLUDE_NMT
 569 // Alloc memory using the test memory type so that we can use that to see if
 570 // NMT picks it up correctly
 571 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 572   jlong addr = 0;
 573   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 574   return addr;
 575 WB_END
 576 
 577 // Alloc memory with pseudo call stack. The test can create psudo malloc
 578 // allocation site to stress the malloc tracking.
 579 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 580   address pc = (address)(size_t)pseudo_stack;
 581   NativeCallStack stack(&pc, 1);
 582   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 583 WB_END
 584 
 585 // Free the memory allocated by NMTAllocTest
 586 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 587   os::free((void*)(uintptr_t)mem);
 588 WB_END
 589 
 590 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 591   jlong addr = 0;
 592 
 593   addr = (jlong)(uintptr_t)os::reserve_memory(size);
 594   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 595 
 596   return addr;
 597 WB_END
 598 
 599 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 600   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 601   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 602 WB_END
 603 
 604 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 605   os::uncommit_memory((char *)(uintptr_t)addr, size);
 606 WB_END
 607 
 608 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 609   os::release_memory((char *)(uintptr_t)addr, size);
 610 WB_END
 611 
 612 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 613   // Test that we can downgrade NMT levels but not upgrade them.
 614   if (MemTracker::tracking_level() == NMT_off) {
 615     MemTracker::transition_to(NMT_off);
 616     return MemTracker::tracking_level() == NMT_off;
 617   } else {
 618     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 619     MemTracker::transition_to(NMT_summary);
 620     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 621 
 622     // Can't go to detail once NMT is set to summary.
 623     MemTracker::transition_to(NMT_detail);
 624     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 625 
 626     // Shutdown sets tracking level to minimal.
 627     MemTracker::shutdown();
 628     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 629 
 630     // Once the tracking level is minimal, we cannot increase to summary.
 631     // The code ignores this request instead of asserting because if the malloc site
 632     // table overflows in another thread, it tries to change the code to summary.
 633     MemTracker::transition_to(NMT_summary);
 634     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 635 
 636     // Really can never go up to detail, verify that the code would never do this.
 637     MemTracker::transition_to(NMT_detail);
 638     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 639     return MemTracker::tracking_level() == NMT_minimal;
 640   }
 641 WB_END
 642 
 643 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 644   int hash_size = MallocSiteTable::hash_buckets();
 645   assert(hash_size > 0, "NMT hash_size should be > 0");
 646   return (jint)hash_size;
 647 WB_END
 648 #endif // INCLUDE_NMT
 649 
 650 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 651   assert(method != NULL, "method should not be null");
 652   ThreadToNativeFromVM ttn(thread);
 653   return env->FromReflectedMethod(method);
 654 }
 655 
 656 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 657 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 658  private:
 659   int _result;
 660   const bool _make_not_entrant;
 661  public:
 662   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 663         _result(0), _make_not_entrant(make_not_entrant) { }
 664   int  result() const { return _result; }
 665 
 666   void doit() {
 667     for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
 668       if (t->has_last_Java_frame()) {
 669         for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
 670           frame* f = fst.current();
 671           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 672             RegisterMap* reg_map = fst.register_map();
 673             Deoptimization::deoptimize(t, *f, reg_map);
 674             if (_make_not_entrant) {
 675                 CompiledMethod* cm = CodeCache::find_compiled(f->pc());
 676                 assert(cm != NULL, "sanity check");
 677                 cm->make_not_entrant();
 678             }
 679             ++_result;
 680           }
 681         }
 682       }
 683     }
 684   }
 685 };
 686 
 687 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 688   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 689   VMThread::execute(&op);
 690   return op.result();
 691 WB_END
 692 
 693 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 694   MutexLockerEx mu(Compile_lock);
 695   CodeCache::mark_all_nmethods_for_deoptimization();
 696   VM_Deoptimize op;
 697   VMThread::execute(&op);
 698 WB_END
 699 
 700 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 701   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 702   int result = 0;
 703   CHECK_JNI_EXCEPTION_(env, result);
 704   MutexLockerEx mu(Compile_lock);
 705   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 706   if (is_osr) {
 707     result += mh->mark_osr_nmethods();
 708   } else if (mh->code() != NULL) {
 709     mh->code()->mark_for_deoptimization();
 710     ++result;
 711   }
 712   result += CodeCache::mark_for_deoptimization(mh());
 713   if (result > 0) {
 714     VM_Deoptimize op;
 715     VMThread::execute(&op);
 716   }
 717   return result;
 718 WB_END
 719 
 720 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 721   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 722   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 723   MutexLockerEx mu(Compile_lock);
 724   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 725   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 726   if (code == NULL) {
 727     return JNI_FALSE;
 728   }
 729   return (code->is_alive() && !code->is_marked_for_deoptimization());
 730 WB_END
 731 
 732 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 733   if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 734     return false;
 735   }
 736   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 737   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 738   MutexLockerEx mu(Compile_lock);
 739   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 740   if (is_osr) {
 741     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 742   } else {
 743     return CompilationPolicy::can_be_compiled(mh, comp_level);
 744   }
 745 WB_END
 746 
 747 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 748   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 749   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 750   MutexLockerEx mu(Compile_lock);
 751   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 752   return mh->queued_for_compilation();
 753 WB_END
 754 
 755 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 756   if (compLevel < CompLevel_none || compLevel > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 757     return false; // Intrinsic is not available on a non-existent compilation level.
 758   }
 759   jmethodID method_id, compilation_context_id;
 760   method_id = reflected_method_to_jmid(thread, env, method);
 761   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 762   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 763 
 764   DirectiveSet* directive;
 765   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 766   assert(comp != NULL, "compiler not available");
 767   if (compilation_context != NULL) {
 768     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 769     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 770     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 771     directive = DirectivesStack::getMatchingDirective(cch, comp);
 772   } else {
 773     // Calling with NULL matches default directive
 774     directive = DirectivesStack::getDefaultDirective(comp);
 775   }
 776   bool result = comp->is_intrinsic_available(mh, directive);
 777   DirectivesStack::release(directive);
 778   return result;
 779 WB_END
 780 
 781 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 782   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 783   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 784   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 785   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 786   return (code != NULL ? code->comp_level() : CompLevel_none);
 787 WB_END
 788 
 789 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 790   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 791   CHECK_JNI_EXCEPTION(env);
 792   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 793   if (is_osr) {
 794     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 795   } else {
 796     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 797   }
 798 WB_END
 799 
 800 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 801   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 802   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 803   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 804   CompiledMethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 805   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 806 WB_END
 807 
 808 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 809   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 810   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 811   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 812   bool result = mh->dont_inline();
 813   mh->set_dont_inline(value == JNI_TRUE);
 814   return result;
 815 WB_END
 816 
 817 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 818   if (comp_level == CompLevel_any) {
 819     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 820         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 821   } else {
 822     return CompileBroker::queue_size(comp_level);
 823   }
 824 WB_END
 825 
 826 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 827   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 828   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 829   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 830   bool result = mh->force_inline();
 831   mh->set_force_inline(value == JNI_TRUE);
 832   return result;
 833 WB_END
 834 
 835 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
 836   // Screen for unavailable/bad comp level or null method
 837   if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier) ||
 838       CompileBroker::compiler(comp_level) == NULL) {
 839     return false;
 840   }
 841   methodHandle mh(THREAD, method);
 842   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, THREAD);
 843   MutexLockerEx mu(Compile_lock);
 844   return (mh->queued_for_compilation() || nm != NULL);
 845 }
 846 
 847 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
 848   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 849   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 850   return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
 851 WB_END
 852 
 853 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
 854   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
 855   return WhiteBox::compile_method(ik->class_initializer(), comp_level, InvocationEntryBci, THREAD);
 856 WB_END
 857 
 858 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
 859   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 860   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 861 
 862   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 863   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
 864   bool result = directive->PrintAssemblyOption;
 865   DirectivesStack::release(directive);
 866 
 867   return result;
 868 WB_END
 869 
 870 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
 871   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 872   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 873 
 874   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 875 
 876   ResourceMark rm;
 877   const char* error_msg = NULL;
 878   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 879   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
 880 
 881   if (m == NULL) {
 882     assert(error_msg != NULL, "Always have an error message");
 883     tty->print_cr("Got error: %s", error_msg);
 884     return -1; // Pattern failed
 885   }
 886 
 887   // Pattern works - now check if it matches
 888   int result;
 889   if (m->match(mh, InlineMatcher::force_inline)) {
 890     result = 2; // Force inline match
 891   } else if (m->match(mh, InlineMatcher::dont_inline)) {
 892     result = 1; // Dont inline match
 893   } else {
 894     result = 0; // No match
 895   }
 896   delete m;
 897   return result;
 898 WB_END
 899 
 900 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
 901   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 902   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 903 
 904   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 905 
 906   ResourceMark rm;
 907   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 908 
 909   const char* error_msg = NULL;
 910 
 911   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
 912   if (m == NULL) {
 913     assert(error_msg != NULL, "Must have error_msg");
 914     tty->print_cr("Got error: %s", error_msg);
 915     return -1;
 916   }
 917 
 918   // Pattern works - now check if it matches
 919   int result = m->matches(mh);
 920   delete m;
 921   assert(result == 0 || result == 1, "Result out of range");
 922   return result;
 923 WB_END
 924 
 925 static AlwaysFalseClosure always_false;
 926 
 927 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
 928   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 929   CHECK_JNI_EXCEPTION(env);
 930   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 931   MutexLockerEx mu(Compile_lock);
 932   MethodData* mdo = mh->method_data();
 933   MethodCounters* mcs = mh->method_counters();
 934 
 935   if (mdo != NULL) {
 936     mdo->init();
 937     ResourceMark rm;
 938     int arg_count = mdo->method()->size_of_parameters();
 939     for (int i = 0; i < arg_count; i++) {
 940       mdo->set_arg_modified(i, 0);
 941     }
 942     MutexLockerEx mu(mdo->extra_data_lock());
 943     mdo->clean_method_data(&always_false);
 944   }
 945 
 946   mh->clear_not_c1_compilable();
 947   mh->clear_not_c2_compilable();
 948   mh->clear_not_c2_osr_compilable();
 949   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
 950   if (mcs != NULL) {
 951     mcs->backedge_counter()->init();
 952     mcs->invocation_counter()->init();
 953     mcs->set_interpreter_invocation_count(0);
 954     mcs->set_interpreter_throwout_count(0);
 955 
 956 #ifdef TIERED
 957     mcs->set_rate(0.0F);
 958     mh->set_prev_event_count(0);
 959     mh->set_prev_time(0);
 960 #endif
 961   }
 962 WB_END
 963 
 964 template <typename T>
 965 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
 966   if (name == NULL) {
 967     return false;
 968   }
 969   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 970   const char* flag_name = env->GetStringUTFChars(name, NULL);
 971   CHECK_JNI_EXCEPTION_(env, false);
 972   Flag::Error result = (*TAt)(flag_name, value, true, true);
 973   env->ReleaseStringUTFChars(name, flag_name);
 974   return (result == Flag::SUCCESS);
 975 }
 976 
 977 template <typename T>
 978 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
 979   if (name == NULL) {
 980     return false;
 981   }
 982   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 983   const char* flag_name = env->GetStringUTFChars(name, NULL);
 984   CHECK_JNI_EXCEPTION_(env, false);
 985   Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
 986   env->ReleaseStringUTFChars(name, flag_name);
 987   return (result == Flag::SUCCESS);
 988 }
 989 
 990 template <typename T>
 991 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
 992   ResourceMark rm(thread);
 993   jclass clazz = env->FindClass(name->as_C_string());
 994   CHECK_JNI_EXCEPTION_(env, NULL);
 995   jmethodID methodID = env->GetStaticMethodID(clazz,
 996         vmSymbols::valueOf_name()->as_C_string(),
 997         sig->as_C_string());
 998   CHECK_JNI_EXCEPTION_(env, NULL);
 999   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1000   CHECK_JNI_EXCEPTION_(env, NULL);
1001   return result;
1002 }
1003 
1004 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1005   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1006 }
1007 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1008   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1009 }
1010 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1011   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1012 }
1013 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1014   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1015 }*/
1016 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1017   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1018 }
1019 
1020 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1021   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1022   const char* flag_name = env->GetStringUTFChars(name, NULL);
1023   CHECK_JNI_EXCEPTION_(env, NULL);
1024   Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
1025   env->ReleaseStringUTFChars(name, flag_name);
1026   return result;
1027 }
1028 
1029 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1030   Flag* flag = getVMFlag(thread, env, name);
1031   return (flag != NULL) && flag->is_constant_in_binary();
1032 WB_END
1033 
1034 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1035   Flag* flag = getVMFlag(thread, env, name);
1036   return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
1037 WB_END
1038 
1039 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1040   bool result;
1041   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
1042     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1043     return booleanBox(thread, env, result);
1044   }
1045   return NULL;
1046 WB_END
1047 
1048 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1049   int result;
1050   if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
1051     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1052     return longBox(thread, env, result);
1053   }
1054   return NULL;
1055 WB_END
1056 
1057 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1058   uint result;
1059   if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
1060     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1061     return longBox(thread, env, result);
1062   }
1063   return NULL;
1064 WB_END
1065 
1066 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1067   intx result;
1068   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
1069     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1070     return longBox(thread, env, result);
1071   }
1072   return NULL;
1073 WB_END
1074 
1075 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1076   uintx result;
1077   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
1078     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1079     return longBox(thread, env, result);
1080   }
1081   return NULL;
1082 WB_END
1083 
1084 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1085   uint64_t result;
1086   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
1087     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1088     return longBox(thread, env, result);
1089   }
1090   return NULL;
1091 WB_END
1092 
1093 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1094   uintx result;
1095   if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
1096     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1097     return longBox(thread, env, result);
1098   }
1099   return NULL;
1100 WB_END
1101 
1102 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1103   double result;
1104   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
1105     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1106     return doubleBox(thread, env, result);
1107   }
1108   return NULL;
1109 WB_END
1110 
1111 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1112   ccstr ccstrResult;
1113   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
1114     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1115     jstring result = env->NewStringUTF(ccstrResult);
1116     CHECK_JNI_EXCEPTION_(env, NULL);
1117     return result;
1118   }
1119   return NULL;
1120 WB_END
1121 
1122 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1123   bool result = value == JNI_TRUE ? true : false;
1124   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
1125 WB_END
1126 
1127 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1128   int result = value;
1129   SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
1130 WB_END
1131 
1132 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1133   uint result = value;
1134   SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
1135 WB_END
1136 
1137 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1138   intx result = value;
1139   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
1140 WB_END
1141 
1142 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1143   uintx result = value;
1144   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
1145 WB_END
1146 
1147 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1148   uint64_t result = value;
1149   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
1150 WB_END
1151 
1152 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1153   size_t result = value;
1154   SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
1155 WB_END
1156 
1157 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1158   double result = value;
1159   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
1160 WB_END
1161 
1162 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1163   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1164   const char* ccstrValue;
1165   if (value == NULL) {
1166     ccstrValue = NULL;
1167   }
1168   else {
1169     ccstrValue = env->GetStringUTFChars(value, NULL);
1170     CHECK_JNI_EXCEPTION(env);
1171   }
1172   ccstr ccstrResult = ccstrValue;
1173   bool needFree;
1174   {
1175     ThreadInVMfromNative ttvfn(thread); // back to VM
1176     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
1177   }
1178   if (value != NULL) {
1179     env->ReleaseStringUTFChars(value, ccstrValue);
1180   }
1181   if (needFree) {
1182     FREE_C_HEAP_ARRAY(char, ccstrResult);
1183   }
1184 WB_END
1185 
1186 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1187   WhiteBox::compilation_locked = true;
1188 WB_END
1189 
1190 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1191   MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1192   WhiteBox::compilation_locked = false;
1193   mo.notify_all();
1194 WB_END
1195 
1196 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
1197   // Force a code cache sweep and block until it finished
1198   NMethodSweeper::force_sweep();
1199 WB_END
1200 
1201 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1202   ResourceMark rm(THREAD);
1203   int len;
1204   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1205   return (StringTable::lookup(name, len) != NULL);
1206 WB_END
1207 
1208 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1209   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
1210   Universe::heap()->collect(GCCause::_wb_full_gc);
1211 #if INCLUDE_ALL_GCS
1212   if (UseG1GC) {
1213     // Needs to be cleared explicitly for G1
1214     Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
1215   }
1216 #endif // INCLUDE_ALL_GCS
1217 WB_END
1218 
1219 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1220   Universe::heap()->collect(GCCause::_wb_young_gc);
1221 WB_END
1222 
1223 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1224   // static+volatile in order to force the read to happen
1225   // (not be eliminated by the compiler)
1226   static char c;
1227   static volatile char* p;
1228 
1229   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1230   if (p == NULL) {
1231     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1232   }
1233 
1234   c = *p;
1235 WB_END
1236 
1237 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1238   const char* features = VM_Version::features_string();
1239   ThreadToNativeFromVM ttn(thread);
1240   jstring features_string = env->NewStringUTF(features);
1241 
1242   CHECK_JNI_EXCEPTION_(env, NULL);
1243 
1244   return features_string;
1245 WB_END
1246 
1247 int WhiteBox::get_blob_type(const CodeBlob* code) {
1248   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1249   if (code->is_aot()) {
1250     return -1;
1251   }
1252   return CodeCache::get_code_heap(code)->code_blob_type();
1253 }
1254 
1255 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1256   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1257   return CodeCache::get_code_heap(blob_type);
1258 }
1259 
1260 struct CodeBlobStub {
1261   CodeBlobStub(const CodeBlob* blob) :
1262       name(os::strdup(blob->name())),
1263       size(blob->size()),
1264       blob_type(WhiteBox::get_blob_type(blob)),
1265       address((jlong) blob) { }
1266   ~CodeBlobStub() { os::free((void*) name); }
1267   const char* const name;
1268   const jint        size;
1269   const jint        blob_type;
1270   const jlong       address;
1271 };
1272 
1273 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1274   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1275   CHECK_JNI_EXCEPTION_(env, NULL);
1276   jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1277 
1278   jstring name = env->NewStringUTF(cb->name);
1279   CHECK_JNI_EXCEPTION_(env, NULL);
1280   env->SetObjectArrayElement(result, 0, name);
1281 
1282   jobject obj = integerBox(thread, env, cb->size);
1283   CHECK_JNI_EXCEPTION_(env, NULL);
1284   env->SetObjectArrayElement(result, 1, obj);
1285 
1286   obj = integerBox(thread, env, cb->blob_type);
1287   CHECK_JNI_EXCEPTION_(env, NULL);
1288   env->SetObjectArrayElement(result, 2, obj);
1289 
1290   obj = longBox(thread, env, cb->address);
1291   CHECK_JNI_EXCEPTION_(env, NULL);
1292   env->SetObjectArrayElement(result, 3, obj);
1293 
1294   return result;
1295 }
1296 
1297 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1298   ResourceMark rm(THREAD);
1299   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1300   CHECK_JNI_EXCEPTION_(env, NULL);
1301   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1302   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1303   jobjectArray result = NULL;
1304   if (code == NULL) {
1305     return result;
1306   }
1307   int comp_level = code->comp_level();
1308   int insts_size = comp_level == CompLevel_aot ? code->code_end() - code->code_begin() : code->insts_size();
1309 
1310   ThreadToNativeFromVM ttn(thread);
1311   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1312   CHECK_JNI_EXCEPTION_(env, NULL);
1313   result = env->NewObjectArray(5, clazz, NULL);
1314   if (result == NULL) {
1315     return result;
1316   }
1317 
1318   CodeBlobStub stub(code);
1319   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1320   CHECK_JNI_EXCEPTION_(env, NULL);
1321   env->SetObjectArrayElement(result, 0, codeBlob);
1322 
1323   jobject level = integerBox(thread, env, comp_level);
1324   CHECK_JNI_EXCEPTION_(env, NULL);
1325   env->SetObjectArrayElement(result, 1, level);
1326 
1327   jbyteArray insts = env->NewByteArray(insts_size);
1328   CHECK_JNI_EXCEPTION_(env, NULL);
1329   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1330   env->SetObjectArrayElement(result, 2, insts);
1331 
1332   jobject id = integerBox(thread, env, code->compile_id());
1333   CHECK_JNI_EXCEPTION_(env, NULL);
1334   env->SetObjectArrayElement(result, 3, id);
1335 
1336   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1337   CHECK_JNI_EXCEPTION_(env, NULL);
1338   env->SetObjectArrayElement(result, 4, entry_point);
1339 
1340   return result;
1341 WB_END
1342 
1343 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1344   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1345   BufferBlob* blob;
1346   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1347   if (full_size < size) {
1348     full_size += align_up(size - full_size, oopSize);
1349   }
1350   {
1351     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1352     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1353     ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1354   }
1355   // Track memory usage statistic after releasing CodeCache_lock
1356   MemoryService::track_code_cache_memory_usage();
1357   return blob;
1358 }
1359 
1360 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1361   if (size < 0) {
1362     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1363       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1364   }
1365   return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1366 WB_END
1367 
1368 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1369   if (addr == 0) {
1370     return;
1371   }
1372   BufferBlob::free((BufferBlob*) addr);
1373 WB_END
1374 
1375 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1376   ResourceMark rm;
1377   GrowableArray<CodeBlobStub*> blobs;
1378   {
1379     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1380     CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1381     if (heap == NULL) {
1382       return NULL;
1383     }
1384     for (CodeBlob* cb = (CodeBlob*) heap->first();
1385          cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1386       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1387       new (stub) CodeBlobStub(cb);
1388       blobs.append(stub);
1389     }
1390   }
1391   if (blobs.length() == 0) {
1392     return NULL;
1393   }
1394   ThreadToNativeFromVM ttn(thread);
1395   jobjectArray result = NULL;
1396   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1397   CHECK_JNI_EXCEPTION_(env, NULL);
1398   result = env->NewObjectArray(blobs.length(), clazz, NULL);
1399   CHECK_JNI_EXCEPTION_(env, NULL);
1400   if (result == NULL) {
1401     return result;
1402   }
1403   int i = 0;
1404   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1405        it != blobs.end(); ++it) {
1406     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1407     CHECK_JNI_EXCEPTION_(env, NULL);
1408     env->SetObjectArrayElement(result, i, obj);
1409     CHECK_JNI_EXCEPTION_(env, NULL);
1410     ++i;
1411   }
1412   return result;
1413 WB_END
1414 
1415 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1416   return CompileBroker::get_compilation_activity_mode();
1417 WB_END
1418 
1419 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1420   if (addr == 0) {
1421     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1422       "WB_GetCodeBlob: addr is null");
1423   }
1424   ThreadToNativeFromVM ttn(thread);
1425   CodeBlobStub stub((CodeBlob*) addr);
1426   return codeBlob2objectArray(thread, env, &stub);
1427 WB_END
1428 
1429 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1430   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1431   CHECK_JNI_EXCEPTION_(env, 0);
1432   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1433   return (jlong) mh->method_data();
1434 WB_END
1435 
1436 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1437   return (jlong) Thread::current()->stack_size();
1438 WB_END
1439 
1440 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1441   JavaThread* t = JavaThread::current();
1442   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1443 WB_END
1444 
1445 
1446 int WhiteBox::array_bytes_to_length(size_t bytes) {
1447   return Array<u1>::bytes_to_length(bytes);
1448 }
1449 
1450 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1451   if (size < 0) {
1452     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1453         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1454   }
1455 
1456   oop class_loader_oop = JNIHandles::resolve(class_loader);
1457   ClassLoaderData* cld = class_loader_oop != NULL
1458       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1459       : ClassLoaderData::the_null_class_loader_data();
1460 
1461   void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1462 
1463   return (jlong)(uintptr_t)metadata;
1464 WB_END
1465 
1466 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1467   oop class_loader_oop = JNIHandles::resolve(class_loader);
1468   ClassLoaderData* cld = class_loader_oop != NULL
1469       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1470       : ClassLoaderData::the_null_class_loader_data();
1471 
1472   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1473 WB_END
1474 
1475 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1476                                 jstring version, jstring location, jobjectArray packages))
1477   ResourceMark rm(THREAD);
1478 
1479   objArrayOop packages_oop = objArrayOop(JNIHandles::resolve(packages));
1480   objArrayHandle packages_h(THREAD, packages_oop);
1481   int num_packages = (packages_h == NULL ? 0 : packages_h->length());
1482 
1483   char** pkgs = NULL;
1484   if (num_packages > 0) {
1485     pkgs = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char*, num_packages);
1486     for (int x = 0; x < num_packages; x++) {
1487       oop pkg_str = packages_h->obj_at(x);
1488       if (pkg_str == NULL || !pkg_str->is_a(SystemDictionary::String_klass())) {
1489         THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1490                   err_msg("Bad package name"));
1491       }
1492       pkgs[x] = java_lang_String::as_utf8_string(pkg_str);
1493     }
1494   }
1495   Modules::define_module(module, is_open, version, location, (const char* const*)pkgs, num_packages, CHECK);
1496 WB_END
1497 
1498 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1499   ResourceMark rm(THREAD);
1500   char* package_name = NULL;
1501   if (package != NULL) {
1502       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1503   }
1504   Modules::add_module_exports_qualified(from_module, package_name, to_module, CHECK);
1505 WB_END
1506 
1507 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1508   ResourceMark rm(THREAD);
1509   char* package_name = NULL;
1510   if (package != NULL) {
1511       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1512   }
1513   Modules::add_module_exports_to_all_unnamed(module, package_name, CHECK);
1514 WB_END
1515 
1516 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1517   ResourceMark rm(THREAD);
1518   char* package_name = NULL;
1519   if (package != NULL) {
1520       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1521   }
1522   Modules::add_module_exports(module, package_name, NULL, CHECK);
1523 WB_END
1524 
1525 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1526   Modules::add_reads_module(from_module, source_module, CHECK);
1527 WB_END
1528 
1529 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1530   if (inc < 0) {
1531     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1532         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1533   }
1534 
1535   jlong max_size_t = (jlong) ((size_t) -1);
1536   if (inc > max_size_t) {
1537     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1538         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1539   }
1540 
1541   size_t new_cap_until_GC = 0;
1542   size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1543   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1544   if (!success) {
1545     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1546                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1547                 "due to contention with another thread");
1548   }
1549   return (jlong) new_cap_until_GC;
1550 WB_END
1551 
1552 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1553   return (jlong) MetaspaceGC::capacity_until_GC();
1554 WB_END
1555 
1556 WB_ENTRY(jboolean, WB_MetaspaceShouldConcurrentCollect(JNIEnv* env, jobject wb))
1557   return MetaspaceGC::should_concurrent_collect();
1558 WB_END
1559 
1560 WB_ENTRY(jlong, WB_MetaspaceReserveAlignment(JNIEnv* env, jobject wb))
1561   return (jlong)Metaspace::reserve_alignment();
1562 WB_END
1563 
1564 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1565   Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1566                                            Monitor::_safepoint_check_always :
1567                                            Monitor::_safepoint_check_never;
1568   MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1569                    attemptedNoSafepointValue == JNI_TRUE);
1570 WB_END
1571 
1572 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1573   oop obj_oop = JNIHandles::resolve(obj);
1574   return (jboolean) obj_oop->mark()->has_monitor();
1575 WB_END
1576 
1577 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1578   VM_ForceSafepoint force_safepoint_op;
1579   VMThread::execute(&force_safepoint_op);
1580 WB_END
1581 
1582 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1583   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1584   return (jlong) ik->constants();
1585 WB_END
1586 
1587 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1588   return ConstantPool::CPCACHE_INDEX_TAG;
1589 WB_END
1590 
1591 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1592   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1593   ConstantPool* cp = ik->constants();
1594   if (cp->cache() == NULL) {
1595       return -1;
1596   }
1597   return cp->cache()->length();
1598 WB_END
1599 
1600 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1601   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1602   ConstantPool* cp = ik->constants();
1603   if (cp->cache() == NULL) {
1604     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1605   }
1606   jint cpci = index;
1607   jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1608   if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1609     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1610   }
1611   jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1612   return cpi;
1613 WB_END
1614 
1615 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1616   return ConstantPool::encode_invokedynamic_index(index);
1617 WB_END
1618 
1619 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1620   VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1621   VMThread::execute(&clear_ics);
1622 WB_END
1623 
1624 template <typename T>
1625 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1626   assert(value != NULL, "sanity");
1627   if (method == NULL || name == NULL) {
1628     return false;
1629   }
1630   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1631   CHECK_JNI_EXCEPTION_(env, false);
1632   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1633   // can't be in VM when we call JNI
1634   ThreadToNativeFromVM ttnfv(thread);
1635   const char* flag_name = env->GetStringUTFChars(name, NULL);
1636   CHECK_JNI_EXCEPTION_(env, false);
1637   bool result =  CompilerOracle::has_option_value(mh, flag_name, *value);
1638   env->ReleaseStringUTFChars(name, flag_name);
1639   return result;
1640 }
1641 
1642 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1643   bool result;
1644   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1645     // can't be in VM when we call JNI
1646     ThreadToNativeFromVM ttnfv(thread);
1647     return booleanBox(thread, env, result);
1648   }
1649   return NULL;
1650 WB_END
1651 
1652 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1653   intx result;
1654   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1655     // can't be in VM when we call JNI
1656     ThreadToNativeFromVM ttnfv(thread);
1657     return longBox(thread, env, result);
1658   }
1659   return NULL;
1660 WB_END
1661 
1662 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1663   uintx result;
1664   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1665     // can't be in VM when we call JNI
1666     ThreadToNativeFromVM ttnfv(thread);
1667     return longBox(thread, env, result);
1668   }
1669   return NULL;
1670 WB_END
1671 
1672 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1673   double result;
1674   if (GetMethodOption <double> (thread, env, method, name, &result)) {
1675     // can't be in VM when we call JNI
1676     ThreadToNativeFromVM ttnfv(thread);
1677     return doubleBox(thread, env, result);
1678   }
1679   return NULL;
1680 WB_END
1681 
1682 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1683   ccstr ccstrResult;
1684   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1685     // can't be in VM when we call JNI
1686     ThreadToNativeFromVM ttnfv(thread);
1687     jstring result = env->NewStringUTF(ccstrResult);
1688     CHECK_JNI_EXCEPTION_(env, NULL);
1689     return result;
1690   }
1691   return NULL;
1692 WB_END
1693 
1694 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1695   oop obj_oop = JNIHandles::resolve(obj);
1696   return oopDesc::is_archive_object(obj_oop);
1697 WB_END
1698 
1699 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1700   return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1701 WB_END
1702 
1703 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1704   return !StringTable::shared_string_mapped();
1705 WB_END
1706 
1707 WB_ENTRY(jobject, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass clazz))
1708   Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1709   if (k->is_instance_klass()) {
1710     InstanceKlass *ik = InstanceKlass::cast(k);
1711     ConstantPool *cp = ik->constants();
1712     objArrayOop refs =  cp->resolved_references();
1713     return (jobject)JNIHandles::make_local(env, refs);
1714   } else {
1715     return NULL;
1716   }
1717 WB_END
1718 
1719 WB_ENTRY(jboolean, WB_IsCDSIncludedInVmBuild(JNIEnv* env))
1720 #if INCLUDE_CDS
1721   return true;
1722 #else
1723   return false;
1724 #endif
1725 WB_END
1726 
1727 //Some convenience methods to deal with objects from java
1728 int WhiteBox::offset_for_field(const char* field_name, oop object,
1729     Symbol* signature_symbol) {
1730   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1731   Thread* THREAD = Thread::current();
1732 
1733   //Get the class of our object
1734   Klass* arg_klass = object->klass();
1735   //Turn it into an instance-klass
1736   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1737 
1738   //Create symbols to look for in the class
1739   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1740       THREAD);
1741 
1742   //To be filled in with an offset of the field we're looking for
1743   fieldDescriptor fd;
1744 
1745   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1746   if (res == NULL) {
1747     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1748         name_symbol->as_C_string());
1749     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
1750   }
1751 
1752   //fetch the field at the offset we've found
1753   int dest_offset = fd.offset();
1754 
1755   return dest_offset;
1756 }
1757 
1758 
1759 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1760   int offset = offset_for_field(field_name, object,
1761       vmSymbols::string_signature());
1762   oop string = object->obj_field(offset);
1763   if (string == NULL) {
1764     return NULL;
1765   }
1766   const char* ret = java_lang_String::as_utf8_string(string);
1767   return ret;
1768 }
1769 
1770 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1771   int offset =
1772       offset_for_field(field_name, object, vmSymbols::bool_signature());
1773   bool ret = (object->bool_field(offset) == JNI_TRUE);
1774   return ret;
1775 }
1776 
1777 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1778   ResourceMark rm;
1779   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1780 
1781   //  one by one registration natives for exception catching
1782   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1783   CHECK_JNI_EXCEPTION(env);
1784   for (int i = 0, n = method_count; i < n; ++i) {
1785     // Skip dummy entries
1786     if (method_array[i].fnPtr == NULL) continue;
1787     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1788       jthrowable throwable_obj = env->ExceptionOccurred();
1789       if (throwable_obj != NULL) {
1790         env->ExceptionClear();
1791         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1792           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1793           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1794           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1795               method_array[i].name, method_array[i].signature);
1796         }
1797       } else {
1798         // Registration failed unexpectedly.
1799         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1800             method_array[i].name, method_array[i].signature);
1801         env->UnregisterNatives(wbclass);
1802         break;
1803       }
1804     }
1805   }
1806 }
1807 
1808 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
1809   // can't be in VM when we call JNI
1810   ThreadToNativeFromVM ttnfv(thread);
1811   const char* dir = env->GetStringUTFChars(compDirect, NULL);
1812   CHECK_JNI_EXCEPTION_(env, 0);
1813   int ret;
1814   {
1815     ThreadInVMfromNative ttvfn(thread); // back to VM
1816     ret = DirectivesParser::parse_string(dir, tty);
1817   }
1818   env->ReleaseStringUTFChars(compDirect, dir);
1819   // -1 for error parsing directive. Return 0 as number of directives added.
1820   if (ret == -1) {
1821     ret = 0;
1822   }
1823   return (jint) ret;
1824 WB_END
1825 
1826 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
1827   DirectivesStack::pop(count);
1828 WB_END
1829 
1830 // Checks that the library libfile has the noexecstack bit set.
1831 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
1832   jboolean ret = false;
1833 #ifdef LINUX
1834   // Can't be in VM when we call JNI.
1835   ThreadToNativeFromVM ttnfv(thread);
1836   const char* lf = env->GetStringUTFChars(libfile, NULL);
1837   CHECK_JNI_EXCEPTION_(env, 0);
1838   ret = (jboolean) ElfFile::specifies_noexecstack(lf);
1839   env->ReleaseStringUTFChars(libfile, lf);
1840 #endif
1841   return ret;
1842 WB_END
1843 
1844 #define CC (char*)
1845 
1846 static JNINativeMethod methods[] = {
1847   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
1848   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
1849   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
1850   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
1851   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
1852   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
1853   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
1854   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
1855   {CC"getHeapAlignment",                 CC"()J",                   (void*)&WB_GetHeapAlignment},
1856   {CC"isClassAlive0",                    CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
1857   {CC"parseCommandLine0",
1858       CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1859       (void*) &WB_ParseCommandLine
1860   },
1861   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1862                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
1863   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
1864                                                       (void*)&WB_AddToSystemClassLoaderSearch},
1865   {CC"getCompressedOopsMaxHeapSize", CC"()J",
1866       (void*)&WB_GetCompressedOopsMaxHeapSize},
1867   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
1868   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
1869   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
1870   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
1871 #if INCLUDE_ALL_GCS
1872   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
1873   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
1874   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
1875   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
1876   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
1877   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
1878   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
1879   {CC"g1StartConcMarkCycle",       CC"()Z",           (void*)&WB_G1StartMarkCycle  },
1880   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1881                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
1882   {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
1883   {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
1884   {CC"g1GetMixedGCInfo",   CC"(I)[J",                 (void*)&WB_G1GetMixedGCInfo },
1885 #endif // INCLUDE_ALL_GCS
1886 #if INCLUDE_NMT
1887   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
1888   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
1889   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
1890   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
1891   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
1892   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
1893   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
1894   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
1895   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
1896 #endif // INCLUDE_NMT
1897   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
1898   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
1899   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
1900                                                       (void*)&WB_DeoptimizeMethod  },
1901   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
1902                                                       (void*)&WB_IsMethodCompiled  },
1903   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1904                                                       (void*)&WB_IsMethodCompilable},
1905   {CC"isMethodQueuedForCompilation0",
1906       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
1907   {CC"isIntrinsicAvailable0",
1908       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1909                                                       (void*)&WB_IsIntrinsicAvailable},
1910   {CC"makeMethodNotCompilable0",
1911       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
1912   {CC"testSetDontInlineMethod0",
1913       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
1914   {CC"getMethodCompilationLevel0",
1915       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
1916   {CC"getMethodEntryBci0",
1917       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
1918   {CC"getCompileQueueSize",
1919       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
1920   {CC"testSetForceInlineMethod0",
1921       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
1922   {CC"enqueueMethodForCompilation0",
1923       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
1924   {CC"enqueueInitializerForCompilation0",
1925       CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
1926   {CC"clearMethodState0",
1927       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
1928   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
1929   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
1930   {CC"matchesMethod",
1931       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1932                                                       (void*)&WB_MatchesMethod},
1933   {CC"matchesInline",
1934       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1935                                                       (void*)&WB_MatchesInline},
1936   {CC"shouldPrintAssembly",
1937         CC"(Ljava/lang/reflect/Executable;I)Z",
1938                                                         (void*)&WB_ShouldPrintAssembly},
1939 
1940   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1941   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1942   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1943   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1944   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1945   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1946   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1947   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1948   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1949   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1950   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
1951                                                       (void*)&WB_SetStringVMFlag},
1952   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1953                                                       (void*)&WB_GetBooleanVMFlag},
1954   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
1955                                                       (void*)&WB_GetIntVMFlag},
1956   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1957                                                       (void*)&WB_GetUintVMFlag},
1958   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1959                                                       (void*)&WB_GetIntxVMFlag},
1960   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1961                                                       (void*)&WB_GetUintxVMFlag},
1962   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
1963                                                       (void*)&WB_GetUint64VMFlag},
1964   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1965                                                       (void*)&WB_GetSizeTVMFlag},
1966   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
1967                                                       (void*)&WB_GetDoubleVMFlag},
1968   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
1969                                                       (void*)&WB_GetStringVMFlag},
1970   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
1971   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
1972   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
1973   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
1974   {CC"allocateMetaspace",
1975      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
1976   {CC"freeMetaspace",
1977      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
1978   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
1979   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
1980   {CC"metaspaceShouldConcurrentCollect", CC"()Z",     (void*)&WB_MetaspaceShouldConcurrentCollect },
1981   {CC"metaspaceReserveAlignment", CC"()J",            (void*)&WB_MetaspaceReserveAlignment },
1982   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
1983   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1984                                                       (void*)&WB_GetNMethod         },
1985   {CC"forceNMethodSweep",  CC"()V",                   (void*)&WB_ForceNMethodSweep  },
1986   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
1987   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
1988   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1989   {CC"getCompilationActivityMode",
1990                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
1991   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
1992                                                       (void*)&WB_GetMethodData      },
1993   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
1994   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
1995   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
1996   {CC"DefineModule",       CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
1997                                                       (void*)&WB_DefineModule },
1998   {CC"AddModuleExports",   CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
1999                                                       (void*)&WB_AddModuleExports },
2000   {CC"AddReadsModule",     CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
2001                                                       (void*)&WB_AddReadsModule },
2002   {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2003                                                       (void*)&WB_AddModuleExportsToAllUnnamed },
2004   {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2005                                                       (void*)&WB_AddModuleExportsToAll },
2006   {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
2007   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
2008   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
2009   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
2010   {CC"getConstantPoolCacheIndexTag0", CC"()I",  (void*)&WB_GetConstantPoolCacheIndexTag},
2011   {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_GetConstantPoolCacheLength},
2012   {CC"remapInstructionOperandFromCPCache0",
2013       CC"(Ljava/lang/Class;I)I",                      (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
2014   {CC"encodeConstantPoolIndyIndex0",
2015       CC"(I)I",                      (void*)&WB_ConstantPoolEncodeIndyIndex},
2016   {CC"getMethodBooleanOption",
2017       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
2018                                                       (void*)&WB_GetMethodBooleaneOption},
2019   {CC"getMethodIntxOption",
2020       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2021                                                       (void*)&WB_GetMethodIntxOption},
2022   {CC"getMethodUintxOption",
2023       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2024                                                       (void*)&WB_GetMethodUintxOption},
2025   {CC"getMethodDoubleOption",
2026       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
2027                                                       (void*)&WB_GetMethodDoubleOption},
2028   {CC"getMethodStringOption",
2029       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
2030                                                       (void*)&WB_GetMethodStringOption},
2031   {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
2032   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
2033   {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
2034   {CC"getResolvedReferences", CC"(Ljava/lang/Class;)Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
2035   {CC"isCDSIncludedInVmBuild",            CC"()Z",    (void*)&WB_IsCDSIncludedInVmBuild },
2036   {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
2037   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
2038                                                       (void*)&WB_AddCompilerDirective },
2039   {CC"removeCompilerDirective",   CC"(I)V",             (void*)&WB_RemoveCompilerDirective },
2040   {CC"currentGC",                 CC"()I",            (void*)&WB_CurrentGC},
2041   {CC"allSupportedGC",            CC"()I",            (void*)&WB_AllSupportedGC},
2042   {CC"gcSelectedByErgo",          CC"()Z",            (void*)&WB_GCSelectedByErgo},
2043   {CC"supportsConcurrentGCPhaseControl", CC"()Z",     (void*)&WB_SupportsConcurrentGCPhaseControl},
2044   {CC"getConcurrentGCPhases",     CC"()[Ljava/lang/String;",
2045                                                       (void*)&WB_GetConcurrentGCPhases},
2046   {CC"requestConcurrentGCPhase0", CC"(Ljava/lang/String;)Z",
2047                                                       (void*)&WB_RequestConcurrentGCPhase},
2048   {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
2049                                                       (void*)&WB_CheckLibSpecifiesNoexecstack},
2050 };
2051 
2052 #undef CC
2053 
2054 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
2055   {
2056     if (WhiteBoxAPI) {
2057       // Make sure that wbclass is loaded by the null classloader
2058       InstanceKlass* ik = InstanceKlass::cast(JNIHandles::resolve(wbclass)->klass());
2059       Handle loader(THREAD, ik->class_loader());
2060       if (loader.is_null()) {
2061         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
2062         WhiteBox::register_extended(env, wbclass, thread);
2063         WhiteBox::set_used();
2064       }
2065     }
2066   }
2067 JVM_END