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