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/handshake.hpp"
  53 #include "runtime/interfaceSupport.hpp"
  54 #include "runtime/javaCalls.hpp"
  55 #include "runtime/os.hpp"
  56 #include "runtime/sweeper.hpp"
  57 #include "runtime/thread.hpp"
  58 #include "runtime/vm_version.hpp"
  59 #include "utilities/align.hpp"
  60 #include "utilities/debug.hpp"
  61 #include "utilities/exceptions.hpp"
  62 #include "utilities/macros.hpp"
  63 #if INCLUDE_ALL_GCS
  64 #include "gc/g1/concurrentMarkThread.hpp"
  65 #include "gc/g1/g1CollectedHeap.inline.hpp"
  66 #include "gc/g1/g1ConcurrentMark.hpp"
  67 #include "gc/g1/heapRegionRemSet.hpp"
  68 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
  69 #include "gc/parallel/adjoiningGenerations.hpp"
  70 #endif // INCLUDE_ALL_GCS
  71 #if INCLUDE_NMT
  72 #include "services/mallocSiteTable.hpp"
  73 #include "services/memTracker.hpp"
  74 #include "utilities/nativeCallStack.hpp"
  75 #endif // INCLUDE_NMT
  76 
  77 #ifdef LINUX
  78 #include "utilities/elfFile.hpp"
  79 #include "osContainer_linux.hpp"
  80 #endif
  81 
  82 #define SIZE_T_MAX_VALUE ((size_t) -1)
  83 
  84 bool WhiteBox::_used = false;
  85 volatile bool WhiteBox::compilation_locked = false;
  86 
  87 class VM_WhiteBoxOperation : public VM_Operation {
  88  public:
  89   VM_WhiteBoxOperation()                         { }
  90   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
  91   bool allow_nested_vm_operations() const        { return true; }
  92 };
  93 
  94 
  95 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  96   return (jlong)(void*)JNIHandles::resolve(obj);
  97 WB_END
  98 
  99 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
 100   return heapOopSize;
 101 WB_END
 102 
 103 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
 104   return os::vm_page_size();
 105 WB_END
 106 
 107 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
 108   return os::vm_allocation_granularity();
 109 WB_END
 110 
 111 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
 112   return os::large_page_size();
 113 WB_END
 114 
 115 class WBIsKlassAliveClosure : public KlassClosure {
 116     Symbol* _name;
 117     bool _found;
 118 public:
 119     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
 120 
 121     void do_klass(Klass* k) {
 122       if (_found) return;
 123       Symbol* ksym = k->name();
 124       if (ksym->fast_compare(_name) == 0) {
 125         _found = true;
 126       }
 127     }
 128 
 129     bool found() const {
 130         return _found;
 131     }
 132 };
 133 
 134 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
 135   oop h_name = JNIHandles::resolve(name);
 136   if (h_name == NULL) return false;
 137   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
 138   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 139 
 140   WBIsKlassAliveClosure closure(sym);
 141   ClassLoaderDataGraph::classes_do(&closure);
 142 
 143   return closure.found();
 144 WB_END
 145 
 146 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 147 #if INCLUDE_JVMTI
 148   ResourceMark rm;
 149   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 150   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 151   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 152   assert(err == JVMTI_ERROR_NONE, "must not fail");
 153 #endif
 154 }
 155 WB_END
 156 
 157 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 158 #if INCLUDE_JVMTI
 159   ResourceMark rm;
 160   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 161   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 162   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 163   assert(err == JVMTI_ERROR_NONE, "must not fail");
 164 #endif
 165 }
 166 WB_END
 167 
 168 
 169 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 170   return (jlong)Arguments::max_heap_for_compressed_oops();
 171 }
 172 WB_END
 173 
 174 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 175   CollectorPolicy * p = Universe::heap()->collector_policy();
 176   tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
 177     SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
 178     p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
 179     p->space_alignment(), p->heap_alignment());
 180 }
 181 WB_END
 182 
 183 #ifndef PRODUCT
 184 // Forward declaration
 185 void TestReservedSpace_test();
 186 void TestReserveMemorySpecial_test();
 187 void TestVirtualSpace_test();
 188 void TestMetaspaceAux_test();
 189 #endif
 190 
 191 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 192 #ifndef PRODUCT
 193   TestReservedSpace_test();
 194   TestReserveMemorySpecial_test();
 195   TestVirtualSpace_test();
 196   TestMetaspaceAux_test();
 197 #endif
 198 WB_END
 199 
 200 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 201   size_t granularity = os::vm_allocation_granularity();
 202   ReservedHeapSpace rhs(100 * granularity, granularity, false);
 203   VirtualSpace vs;
 204   vs.initialize(rhs, 50 * granularity);
 205 
 206   // Check if constraints are complied
 207   if (!( UseCompressedOops && rhs.base() != NULL &&
 208          Universe::narrow_oop_base() != NULL &&
 209          Universe::narrow_oop_use_implicit_null_checks() )) {
 210     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 211                   "\tUseCompressedOops is %d\n"
 212                   "\trhs.base() is " PTR_FORMAT "\n"
 213                   "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
 214                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
 215                   UseCompressedOops,
 216                   p2i(rhs.base()),
 217                   p2i(Universe::narrow_oop_base()),
 218                   Universe::narrow_oop_use_implicit_null_checks());
 219     return;
 220   }
 221   tty->print_cr("Reading from no access area... ");
 222   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 223                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 224 WB_END
 225 
 226 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 227                                            size_t magnitude, size_t iterations) {
 228   size_t granularity = os::vm_allocation_granularity();
 229   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
 230   VirtualSpace vs;
 231   if (!vs.initialize(rhs, 0)) {
 232     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 233     return 3;
 234   }
 235 
 236   int seed = os::random();
 237   tty->print_cr("Random seed is %d", seed);
 238   os::init_random(seed);
 239 
 240   for (size_t i = 0; i < iterations; i++) {
 241 
 242     // Whether we will shrink or grow
 243     bool shrink = os::random() % 2L == 0;
 244 
 245     // Get random delta to resize virtual space
 246     size_t delta = (size_t)os::random() % magnitude;
 247 
 248     // If we are about to shrink virtual space below zero, then expand instead
 249     if (shrink && vs.committed_size() < delta) {
 250       shrink = false;
 251     }
 252 
 253     // Resizing by delta
 254     if (shrink) {
 255       vs.shrink_by(delta);
 256     } else {
 257       // If expanding fails expand_by will silently return false
 258       vs.expand_by(delta, true);
 259     }
 260   }
 261   return 0;
 262 }
 263 
 264 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 265         jlong reserved_space_size, jlong magnitude, jlong iterations))
 266   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 267                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 268                 iterations);
 269   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 270     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 271     return 1;
 272   }
 273 
 274   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 275   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 276   if (sizeof(size_t) < sizeof(jlong)) {
 277     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 278     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 279         || iterations > size_t_max_value) {
 280       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 281       return 2;
 282     }
 283   }
 284 
 285   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 286                                         (size_t) magnitude, (size_t) iterations);
 287 WB_END
 288 
 289 static const jint serial_code   = 1;
 290 static const jint parallel_code = 2;
 291 static const jint cms_code      = 4;
 292 static const jint g1_code       = 8;
 293 
 294 WB_ENTRY(jint, WB_CurrentGC(JNIEnv* env, jobject o, jobject obj))
 295   if (UseSerialGC) {
 296     return serial_code;
 297   } else if (UseParallelGC || UseParallelOldGC) {
 298     return parallel_code;
 299   } if (UseConcMarkSweepGC) {
 300     return cms_code;
 301   } else if (UseG1GC) {
 302     return g1_code;
 303   }
 304   ShouldNotReachHere();
 305   return 0;
 306 WB_END
 307 
 308 WB_ENTRY(jint, WB_AllSupportedGC(JNIEnv* env, jobject o, jobject obj))
 309 #if INCLUDE_ALL_GCS
 310   return serial_code | parallel_code | cms_code | g1_code;
 311 #else
 312   return serial_code;
 313 #endif // INCLUDE_ALL_GCS
 314 WB_END
 315 
 316 WB_ENTRY(jboolean, WB_GCSelectedByErgo(JNIEnv* env, jobject o, jobject obj))
 317   if (UseSerialGC) {
 318     return FLAG_IS_ERGO(UseSerialGC);
 319   } else if (UseParallelGC) {
 320     return FLAG_IS_ERGO(UseParallelGC);
 321   } else if (UseParallelOldGC) {
 322     return FLAG_IS_ERGO(UseParallelOldGC);
 323   } else if (UseConcMarkSweepGC) {
 324     return FLAG_IS_ERGO(UseConcMarkSweepGC);
 325   } else if (UseG1GC) {
 326     return FLAG_IS_ERGO(UseG1GC);
 327   }
 328   ShouldNotReachHere();
 329   return false;
 330 WB_END
 331 
 332 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 333   oop p = JNIHandles::resolve(obj);
 334 #if INCLUDE_ALL_GCS
 335   if (UseG1GC) {
 336     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 337     const HeapRegion* hr = g1->heap_region_containing(p);
 338     if (hr == NULL) {
 339       return false;
 340     }
 341     return !(hr->is_young());
 342   } else if (UseParallelGC) {
 343     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 344     return !psh->is_in_young(p);
 345   }
 346 #endif // INCLUDE_ALL_GCS
 347   GenCollectedHeap* gch = GenCollectedHeap::heap();
 348   return !gch->is_in_young(p);
 349 WB_END
 350 
 351 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 352   oop p = JNIHandles::resolve(obj);
 353   return p->size() * HeapWordSize;
 354 WB_END
 355 
 356 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 357   size_t alignment = Universe::heap()->collector_policy()->space_alignment();
 358   return (jlong)alignment;
 359 WB_END
 360 
 361 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
 362   size_t alignment = Universe::heap()->collector_policy()->heap_alignment();
 363   return (jlong)alignment;
 364 WB_END
 365 
 366 WB_ENTRY(jboolean, WB_SupportsConcurrentGCPhaseControl(JNIEnv* env, jobject o))
 367   return Universe::heap()->supports_concurrent_phase_control();
 368 WB_END
 369 
 370 WB_ENTRY(jobjectArray, WB_GetConcurrentGCPhases(JNIEnv* env, jobject o))
 371   const char* const* phases = Universe::heap()->concurrent_phases();
 372   jint nphases = 0;
 373   for ( ; phases[nphases] != NULL; ++nphases) ;
 374 
 375   ResourceMark rm(thread);
 376   ThreadToNativeFromVM ttn(thread);
 377   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
 378   CHECK_JNI_EXCEPTION_(env, NULL);
 379 
 380   jobjectArray result = env->NewObjectArray(nphases, clazz, NULL);
 381   CHECK_JNI_EXCEPTION_(env, NULL);
 382 
 383   // If push fails, return with pending exception.
 384   if (env->PushLocalFrame(nphases) < 0) return NULL;
 385   for (jint i = 0; i < nphases; ++i) {
 386     jstring phase = env->NewStringUTF(phases[i]);
 387     CHECK_JNI_EXCEPTION_(env, NULL);
 388     env->SetObjectArrayElement(result, i, phase);
 389     CHECK_JNI_EXCEPTION_(env, NULL);
 390   }
 391   env->PopLocalFrame(NULL);
 392 
 393   return result;
 394 WB_END
 395 
 396 WB_ENTRY(jboolean, WB_RequestConcurrentGCPhase(JNIEnv* env, jobject o, jstring name))
 397   Handle h_name(THREAD, JNIHandles::resolve(name));
 398   ResourceMark rm;
 399   const char* c_name = java_lang_String::as_utf8_string(h_name());
 400   return Universe::heap()->request_concurrent_phase(c_name);
 401 WB_END
 402 
 403 #if INCLUDE_ALL_GCS
 404 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 405   if (UseG1GC) {
 406     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 407     oop result = JNIHandles::resolve(obj);
 408     const HeapRegion* hr = g1->heap_region_containing(result);
 409     return hr->is_humongous();
 410   }
 411   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
 412 WB_END
 413 
 414 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 415   if (UseG1GC) {
 416     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 417     const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 418     return hr->is_humongous();
 419   }
 420   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
 421 WB_END
 422 
 423 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 424   if (UseG1GC) {
 425     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 426     const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 427     return hr->is_free();
 428   }
 429   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
 430 WB_END
 431 
 432 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 433   if (UseG1GC) {
 434     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 435     size_t nr = g1->max_regions();
 436     return (jlong)nr;
 437   }
 438   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
 439 WB_END
 440 
 441 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 442   if (UseG1GC) {
 443     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 444     size_t nr = g1->num_free_regions();
 445     return (jlong)nr;
 446   }
 447   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
 448 WB_END
 449 
 450 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 451   if (UseG1GC) {
 452     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 453     return g1h->concurrent_mark()->cm_thread()->during_cycle();
 454   }
 455   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
 456 WB_END
 457 
 458 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
 459   if (UseG1GC) {
 460     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 461     if (!g1h->concurrent_mark()->cm_thread()->during_cycle()) {
 462       g1h->collect(GCCause::_wb_conc_mark);
 463       return true;
 464     }
 465     return false;
 466   }
 467   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1StartMarkCycle: G1 GC is not enabled");
 468 WB_END
 469 
 470 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 471   if (UseG1GC) {
 472     return (jint)HeapRegion::GrainBytes;
 473   }
 474   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
 475 WB_END
 476 
 477 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
 478 #if INCLUDE_ALL_GCS
 479   if (UseParallelGC) {
 480     return ParallelScavengeHeap::heap()->gens()->virtual_spaces()->alignment();
 481   }
 482 #endif // INCLUDE_ALL_GCS
 483   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
 484 WB_END
 485 
 486 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
 487 #if INCLUDE_ALL_GCS
 488   if (UseParallelGC) {
 489     return ParallelScavengeHeap::heap()->generation_alignment();
 490   }
 491 #endif // INCLUDE_ALL_GCS
 492   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
 493 WB_END
 494 
 495 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 496 #if INCLUDE_ALL_GCS
 497   if (UseG1GC) {
 498     ResourceMark rm(THREAD);
 499     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 500     MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 501     Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 502     return JNIHandles::make_local(env, h());
 503   }
 504 #endif // INCLUDE_ALL_GCS
 505   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
 506 WB_END
 507 
 508 class OldRegionsLivenessClosure: public HeapRegionClosure {
 509 
 510  private:
 511   const int _liveness;
 512   size_t _total_count;
 513   size_t _total_memory;
 514   size_t _total_memory_to_free;
 515 
 516  public:
 517   OldRegionsLivenessClosure(int liveness) :
 518     _liveness(liveness),
 519     _total_count(0),
 520     _total_memory(0),
 521     _total_memory_to_free(0) { }
 522 
 523     size_t total_count() { return _total_count; }
 524     size_t total_memory() { return _total_memory; }
 525     size_t total_memory_to_free() { return _total_memory_to_free; }
 526 
 527   bool doHeapRegion(HeapRegion* r) {
 528     if (r->is_old()) {
 529       size_t prev_live = r->marked_bytes();
 530       size_t live = r->live_bytes();
 531       size_t size = r->used();
 532       size_t reg_size = HeapRegion::GrainBytes;
 533       if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
 534         _total_memory += size;
 535         ++_total_count;
 536         if (size == reg_size) {
 537         // we don't include non-full regions since they are unlikely included in mixed gc
 538         // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
 539           _total_memory_to_free += size - prev_live;
 540         }
 541       }
 542     }
 543     return false;
 544   }
 545 };
 546 
 547 
 548 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
 549   if (!UseG1GC) {
 550     THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
 551   }
 552   if (liveness < 0) {
 553     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
 554   }
 555 
 556   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 557   OldRegionsLivenessClosure rli(liveness);
 558   g1h->heap_region_iterate(&rli);
 559 
 560   typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
 561   result->long_at_put(0, rli.total_count());
 562   result->long_at_put(1, rli.total_memory());
 563   result->long_at_put(2, rli.total_memory_to_free());
 564   return (jlongArray) JNIHandles::make_local(env, result);
 565 WB_END
 566 
 567 #endif // INCLUDE_ALL_GCS
 568 
 569 #if INCLUDE_NMT
 570 // Alloc memory using the test memory type so that we can use that to see if
 571 // NMT picks it up correctly
 572 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 573   jlong addr = 0;
 574   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 575   return addr;
 576 WB_END
 577 
 578 // Alloc memory with pseudo call stack. The test can create psudo malloc
 579 // allocation site to stress the malloc tracking.
 580 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 581   address pc = (address)(size_t)pseudo_stack;
 582   NativeCallStack stack(&pc, 1);
 583   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 584 WB_END
 585 
 586 // Free the memory allocated by NMTAllocTest
 587 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 588   os::free((void*)(uintptr_t)mem);
 589 WB_END
 590 
 591 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 592   jlong addr = 0;
 593 
 594   addr = (jlong)(uintptr_t)os::reserve_memory(size);
 595   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 596 
 597   return addr;
 598 WB_END
 599 
 600 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 601   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 602   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 603 WB_END
 604 
 605 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 606   os::uncommit_memory((char *)(uintptr_t)addr, size);
 607 WB_END
 608 
 609 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 610   os::release_memory((char *)(uintptr_t)addr, size);
 611 WB_END
 612 
 613 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 614   // Test that we can downgrade NMT levels but not upgrade them.
 615   if (MemTracker::tracking_level() == NMT_off) {
 616     MemTracker::transition_to(NMT_off);
 617     return MemTracker::tracking_level() == NMT_off;
 618   } else {
 619     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 620     MemTracker::transition_to(NMT_summary);
 621     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 622 
 623     // Can't go to detail once NMT is set to summary.
 624     MemTracker::transition_to(NMT_detail);
 625     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 626 
 627     // Shutdown sets tracking level to minimal.
 628     MemTracker::shutdown();
 629     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 630 
 631     // Once the tracking level is minimal, we cannot increase to summary.
 632     // The code ignores this request instead of asserting because if the malloc site
 633     // table overflows in another thread, it tries to change the code to summary.
 634     MemTracker::transition_to(NMT_summary);
 635     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 636 
 637     // Really can never go up to detail, verify that the code would never do this.
 638     MemTracker::transition_to(NMT_detail);
 639     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 640     return MemTracker::tracking_level() == NMT_minimal;
 641   }
 642 WB_END
 643 
 644 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 645   int hash_size = MallocSiteTable::hash_buckets();
 646   assert(hash_size > 0, "NMT hash_size should be > 0");
 647   return (jint)hash_size;
 648 WB_END
 649 #endif // INCLUDE_NMT
 650 
 651 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 652   assert(method != NULL, "method should not be null");
 653   ThreadToNativeFromVM ttn(thread);
 654   return env->FromReflectedMethod(method);
 655 }
 656 
 657 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 658 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 659  private:
 660   int _result;
 661   const bool _make_not_entrant;
 662  public:
 663   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 664         _result(0), _make_not_entrant(make_not_entrant) { }
 665   int  result() const { return _result; }
 666 
 667   void doit() {
 668     for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
 669       if (t->has_last_Java_frame()) {
 670         for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
 671           frame* f = fst.current();
 672           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 673             RegisterMap* reg_map = fst.register_map();
 674             Deoptimization::deoptimize(t, *f, reg_map);
 675             if (_make_not_entrant) {
 676                 CompiledMethod* cm = CodeCache::find_compiled(f->pc());
 677                 assert(cm != NULL, "sanity check");
 678                 cm->make_not_entrant();
 679             }
 680             ++_result;
 681           }
 682         }
 683       }
 684     }
 685   }
 686 };
 687 
 688 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 689   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 690   VMThread::execute(&op);
 691   return op.result();
 692 WB_END
 693 
 694 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 695   MutexLockerEx mu(Compile_lock);
 696   CodeCache::mark_all_nmethods_for_deoptimization();
 697   VM_Deoptimize op;
 698   VMThread::execute(&op);
 699 WB_END
 700 
 701 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 702   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 703   int result = 0;
 704   CHECK_JNI_EXCEPTION_(env, result);
 705   MutexLockerEx mu(Compile_lock);
 706   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 707   if (is_osr) {
 708     result += mh->mark_osr_nmethods();
 709   } else if (mh->code() != NULL) {
 710     mh->code()->mark_for_deoptimization();
 711     ++result;
 712   }
 713   result += CodeCache::mark_for_deoptimization(mh());
 714   if (result > 0) {
 715     VM_Deoptimize op;
 716     VMThread::execute(&op);
 717   }
 718   return result;
 719 WB_END
 720 
 721 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 722   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 723   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 724   MutexLockerEx mu(Compile_lock);
 725   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 726   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 727   if (code == NULL) {
 728     return JNI_FALSE;
 729   }
 730   return (code->is_alive() && !code->is_marked_for_deoptimization());
 731 WB_END
 732 
 733 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 734   if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 735     return false;
 736   }
 737   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 738   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 739   MutexLockerEx mu(Compile_lock);
 740   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 741   if (is_osr) {
 742     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 743   } else {
 744     return CompilationPolicy::can_be_compiled(mh, comp_level);
 745   }
 746 WB_END
 747 
 748 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 749   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 750   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 751   MutexLockerEx mu(Compile_lock);
 752   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 753   return mh->queued_for_compilation();
 754 WB_END
 755 
 756 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 757   if (compLevel < CompLevel_none || compLevel > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 758     return false; // Intrinsic is not available on a non-existent compilation level.
 759   }
 760   jmethodID method_id, compilation_context_id;
 761   method_id = reflected_method_to_jmid(thread, env, method);
 762   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 763   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 764 
 765   DirectiveSet* directive;
 766   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 767   assert(comp != NULL, "compiler not available");
 768   if (compilation_context != NULL) {
 769     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 770     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 771     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 772     directive = DirectivesStack::getMatchingDirective(cch, comp);
 773   } else {
 774     // Calling with NULL matches default directive
 775     directive = DirectivesStack::getDefaultDirective(comp);
 776   }
 777   bool result = comp->is_intrinsic_available(mh, directive);
 778   DirectivesStack::release(directive);
 779   return result;
 780 WB_END
 781 
 782 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 783   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 784   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 785   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 786   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 787   return (code != NULL ? code->comp_level() : CompLevel_none);
 788 WB_END
 789 
 790 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 791   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 792   CHECK_JNI_EXCEPTION(env);
 793   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 794   if (is_osr) {
 795     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 796   } else {
 797     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 798   }
 799 WB_END
 800 
 801 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 802   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 803   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 804   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 805   CompiledMethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 806   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 807 WB_END
 808 
 809 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 810   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 811   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 812   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 813   bool result = mh->dont_inline();
 814   mh->set_dont_inline(value == JNI_TRUE);
 815   return result;
 816 WB_END
 817 
 818 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 819   if (comp_level == CompLevel_any) {
 820     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 821         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 822   } else {
 823     return CompileBroker::queue_size(comp_level);
 824   }
 825 WB_END
 826 
 827 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 828   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 829   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 830   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 831   bool result = mh->force_inline();
 832   mh->set_force_inline(value == JNI_TRUE);
 833   return result;
 834 WB_END
 835 
 836 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
 837   // Screen for unavailable/bad comp level or null method
 838   if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier) ||
 839       CompileBroker::compiler(comp_level) == NULL) {
 840     return false;
 841   }
 842   methodHandle mh(THREAD, method);
 843   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, THREAD);
 844   MutexLockerEx mu(Compile_lock);
 845   return (mh->queued_for_compilation() || nm != NULL);
 846 }
 847 
 848 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
 849   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 850   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 851   return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
 852 WB_END
 853 
 854 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
 855   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
 856   return WhiteBox::compile_method(ik->class_initializer(), comp_level, InvocationEntryBci, THREAD);
 857 WB_END
 858 
 859 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
 860   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 861   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 862 
 863   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 864   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
 865   bool result = directive->PrintAssemblyOption;
 866   DirectivesStack::release(directive);
 867 
 868   return result;
 869 WB_END
 870 
 871 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
 872   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 873   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 874 
 875   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 876 
 877   ResourceMark rm;
 878   const char* error_msg = NULL;
 879   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 880   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
 881 
 882   if (m == NULL) {
 883     assert(error_msg != NULL, "Always have an error message");
 884     tty->print_cr("Got error: %s", error_msg);
 885     return -1; // Pattern failed
 886   }
 887 
 888   // Pattern works - now check if it matches
 889   int result;
 890   if (m->match(mh, InlineMatcher::force_inline)) {
 891     result = 2; // Force inline match
 892   } else if (m->match(mh, InlineMatcher::dont_inline)) {
 893     result = 1; // Dont inline match
 894   } else {
 895     result = 0; // No match
 896   }
 897   delete m;
 898   return result;
 899 WB_END
 900 
 901 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
 902   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 903   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 904 
 905   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 906 
 907   ResourceMark rm;
 908   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 909 
 910   const char* error_msg = NULL;
 911 
 912   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
 913   if (m == NULL) {
 914     assert(error_msg != NULL, "Must have error_msg");
 915     tty->print_cr("Got error: %s", error_msg);
 916     return -1;
 917   }
 918 
 919   // Pattern works - now check if it matches
 920   int result = m->matches(mh);
 921   delete m;
 922   assert(result == 0 || result == 1, "Result out of range");
 923   return result;
 924 WB_END
 925 
 926 static AlwaysFalseClosure always_false;
 927 
 928 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
 929   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 930   CHECK_JNI_EXCEPTION(env);
 931   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 932   MutexLockerEx mu(Compile_lock);
 933   MethodData* mdo = mh->method_data();
 934   MethodCounters* mcs = mh->method_counters();
 935 
 936   if (mdo != NULL) {
 937     mdo->init();
 938     ResourceMark rm;
 939     int arg_count = mdo->method()->size_of_parameters();
 940     for (int i = 0; i < arg_count; i++) {
 941       mdo->set_arg_modified(i, 0);
 942     }
 943     MutexLockerEx mu(mdo->extra_data_lock());
 944     mdo->clean_method_data(&always_false);
 945   }
 946 
 947   mh->clear_not_c1_compilable();
 948   mh->clear_not_c2_compilable();
 949   mh->clear_not_c2_osr_compilable();
 950   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
 951   if (mcs != NULL) {
 952     mcs->backedge_counter()->init();
 953     mcs->invocation_counter()->init();
 954     mcs->set_interpreter_invocation_count(0);
 955     mcs->set_interpreter_throwout_count(0);
 956 
 957 #ifdef TIERED
 958     mcs->set_rate(0.0F);
 959     mh->set_prev_event_count(0);
 960     mh->set_prev_time(0);
 961 #endif
 962   }
 963 WB_END
 964 
 965 template <typename T>
 966 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
 967   if (name == NULL) {
 968     return false;
 969   }
 970   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 971   const char* flag_name = env->GetStringUTFChars(name, NULL);
 972   CHECK_JNI_EXCEPTION_(env, false);
 973   Flag::Error result = (*TAt)(flag_name, value, true, true);
 974   env->ReleaseStringUTFChars(name, flag_name);
 975   return (result == Flag::SUCCESS);
 976 }
 977 
 978 template <typename T>
 979 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
 980   if (name == NULL) {
 981     return false;
 982   }
 983   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 984   const char* flag_name = env->GetStringUTFChars(name, NULL);
 985   CHECK_JNI_EXCEPTION_(env, false);
 986   Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
 987   env->ReleaseStringUTFChars(name, flag_name);
 988   return (result == Flag::SUCCESS);
 989 }
 990 
 991 template <typename T>
 992 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
 993   ResourceMark rm(thread);
 994   jclass clazz = env->FindClass(name->as_C_string());
 995   CHECK_JNI_EXCEPTION_(env, NULL);
 996   jmethodID methodID = env->GetStaticMethodID(clazz,
 997         vmSymbols::valueOf_name()->as_C_string(),
 998         sig->as_C_string());
 999   CHECK_JNI_EXCEPTION_(env, NULL);
1000   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1001   CHECK_JNI_EXCEPTION_(env, NULL);
1002   return result;
1003 }
1004 
1005 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1006   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1007 }
1008 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1009   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1010 }
1011 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1012   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1013 }
1014 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1015   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1016 }*/
1017 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1018   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1019 }
1020 
1021 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1022   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1023   const char* flag_name = env->GetStringUTFChars(name, NULL);
1024   CHECK_JNI_EXCEPTION_(env, NULL);
1025   Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
1026   env->ReleaseStringUTFChars(name, flag_name);
1027   return result;
1028 }
1029 
1030 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1031   Flag* flag = getVMFlag(thread, env, name);
1032   return (flag != NULL) && flag->is_constant_in_binary();
1033 WB_END
1034 
1035 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1036   Flag* flag = getVMFlag(thread, env, name);
1037   return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
1038 WB_END
1039 
1040 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1041   bool result;
1042   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
1043     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1044     return booleanBox(thread, env, result);
1045   }
1046   return NULL;
1047 WB_END
1048 
1049 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1050   int result;
1051   if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
1052     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1053     return longBox(thread, env, result);
1054   }
1055   return NULL;
1056 WB_END
1057 
1058 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1059   uint result;
1060   if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
1061     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1062     return longBox(thread, env, result);
1063   }
1064   return NULL;
1065 WB_END
1066 
1067 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1068   intx result;
1069   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
1070     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1071     return longBox(thread, env, result);
1072   }
1073   return NULL;
1074 WB_END
1075 
1076 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1077   uintx result;
1078   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
1079     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1080     return longBox(thread, env, result);
1081   }
1082   return NULL;
1083 WB_END
1084 
1085 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1086   uint64_t result;
1087   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
1088     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1089     return longBox(thread, env, result);
1090   }
1091   return NULL;
1092 WB_END
1093 
1094 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1095   uintx result;
1096   if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
1097     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1098     return longBox(thread, env, result);
1099   }
1100   return NULL;
1101 WB_END
1102 
1103 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1104   double result;
1105   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
1106     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1107     return doubleBox(thread, env, result);
1108   }
1109   return NULL;
1110 WB_END
1111 
1112 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1113   ccstr ccstrResult;
1114   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
1115     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1116     jstring result = env->NewStringUTF(ccstrResult);
1117     CHECK_JNI_EXCEPTION_(env, NULL);
1118     return result;
1119   }
1120   return NULL;
1121 WB_END
1122 
1123 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1124   bool result = value == JNI_TRUE ? true : false;
1125   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
1126 WB_END
1127 
1128 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1129   int result = value;
1130   SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
1131 WB_END
1132 
1133 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1134   uint result = value;
1135   SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
1136 WB_END
1137 
1138 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1139   intx result = value;
1140   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
1141 WB_END
1142 
1143 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1144   uintx result = value;
1145   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
1146 WB_END
1147 
1148 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1149   uint64_t result = value;
1150   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
1151 WB_END
1152 
1153 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1154   size_t result = value;
1155   SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
1156 WB_END
1157 
1158 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1159   double result = value;
1160   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
1161 WB_END
1162 
1163 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1164   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1165   const char* ccstrValue;
1166   if (value == NULL) {
1167     ccstrValue = NULL;
1168   }
1169   else {
1170     ccstrValue = env->GetStringUTFChars(value, NULL);
1171     CHECK_JNI_EXCEPTION(env);
1172   }
1173   ccstr ccstrResult = ccstrValue;
1174   bool needFree;
1175   {
1176     ThreadInVMfromNative ttvfn(thread); // back to VM
1177     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
1178   }
1179   if (value != NULL) {
1180     env->ReleaseStringUTFChars(value, ccstrValue);
1181   }
1182   if (needFree) {
1183     FREE_C_HEAP_ARRAY(char, ccstrResult);
1184   }
1185 WB_END
1186 
1187 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1188   WhiteBox::compilation_locked = true;
1189 WB_END
1190 
1191 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1192   MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1193   WhiteBox::compilation_locked = false;
1194   mo.notify_all();
1195 WB_END
1196 
1197 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
1198   // Force a code cache sweep and block until it finished
1199   NMethodSweeper::force_sweep();
1200 WB_END
1201 
1202 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1203   ResourceMark rm(THREAD);
1204   int len;
1205   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1206   return (StringTable::lookup(name, len) != NULL);
1207 WB_END
1208 
1209 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1210   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
1211   Universe::heap()->collect(GCCause::_wb_full_gc);
1212 #if INCLUDE_ALL_GCS
1213   if (UseG1GC) {
1214     // Needs to be cleared explicitly for G1
1215     Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
1216   }
1217 #endif // INCLUDE_ALL_GCS
1218 WB_END
1219 
1220 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1221   Universe::heap()->collect(GCCause::_wb_young_gc);
1222 WB_END
1223 
1224 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1225   // static+volatile in order to force the read to happen
1226   // (not be eliminated by the compiler)
1227   static char c;
1228   static volatile char* p;
1229 
1230   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1231   if (p == NULL) {
1232     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1233   }
1234 
1235   c = *p;
1236 WB_END
1237 
1238 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1239   const char* features = VM_Version::features_string();
1240   ThreadToNativeFromVM ttn(thread);
1241   jstring features_string = env->NewStringUTF(features);
1242 
1243   CHECK_JNI_EXCEPTION_(env, NULL);
1244 
1245   return features_string;
1246 WB_END
1247 
1248 int WhiteBox::get_blob_type(const CodeBlob* code) {
1249   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1250   if (code->is_aot()) {
1251     return -1;
1252   }
1253   return CodeCache::get_code_heap(code)->code_blob_type();
1254 }
1255 
1256 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1257   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1258   return CodeCache::get_code_heap(blob_type);
1259 }
1260 
1261 struct CodeBlobStub {
1262   CodeBlobStub(const CodeBlob* blob) :
1263       name(os::strdup(blob->name())),
1264       size(blob->size()),
1265       blob_type(WhiteBox::get_blob_type(blob)),
1266       address((jlong) blob) { }
1267   ~CodeBlobStub() { os::free((void*) name); }
1268   const char* const name;
1269   const jint        size;
1270   const jint        blob_type;
1271   const jlong       address;
1272 };
1273 
1274 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1275   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1276   CHECK_JNI_EXCEPTION_(env, NULL);
1277   jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1278 
1279   jstring name = env->NewStringUTF(cb->name);
1280   CHECK_JNI_EXCEPTION_(env, NULL);
1281   env->SetObjectArrayElement(result, 0, name);
1282 
1283   jobject obj = integerBox(thread, env, cb->size);
1284   CHECK_JNI_EXCEPTION_(env, NULL);
1285   env->SetObjectArrayElement(result, 1, obj);
1286 
1287   obj = integerBox(thread, env, cb->blob_type);
1288   CHECK_JNI_EXCEPTION_(env, NULL);
1289   env->SetObjectArrayElement(result, 2, obj);
1290 
1291   obj = longBox(thread, env, cb->address);
1292   CHECK_JNI_EXCEPTION_(env, NULL);
1293   env->SetObjectArrayElement(result, 3, obj);
1294 
1295   return result;
1296 }
1297 
1298 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1299   ResourceMark rm(THREAD);
1300   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1301   CHECK_JNI_EXCEPTION_(env, NULL);
1302   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1303   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1304   jobjectArray result = NULL;
1305   if (code == NULL) {
1306     return result;
1307   }
1308   int comp_level = code->comp_level();
1309   int insts_size = comp_level == CompLevel_aot ? code->code_end() - code->code_begin() : code->insts_size();
1310 
1311   ThreadToNativeFromVM ttn(thread);
1312   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1313   CHECK_JNI_EXCEPTION_(env, NULL);
1314   result = env->NewObjectArray(5, clazz, NULL);
1315   if (result == NULL) {
1316     return result;
1317   }
1318 
1319   CodeBlobStub stub(code);
1320   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1321   CHECK_JNI_EXCEPTION_(env, NULL);
1322   env->SetObjectArrayElement(result, 0, codeBlob);
1323 
1324   jobject level = integerBox(thread, env, comp_level);
1325   CHECK_JNI_EXCEPTION_(env, NULL);
1326   env->SetObjectArrayElement(result, 1, level);
1327 
1328   jbyteArray insts = env->NewByteArray(insts_size);
1329   CHECK_JNI_EXCEPTION_(env, NULL);
1330   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1331   env->SetObjectArrayElement(result, 2, insts);
1332 
1333   jobject id = integerBox(thread, env, code->compile_id());
1334   CHECK_JNI_EXCEPTION_(env, NULL);
1335   env->SetObjectArrayElement(result, 3, id);
1336 
1337   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1338   CHECK_JNI_EXCEPTION_(env, NULL);
1339   env->SetObjectArrayElement(result, 4, entry_point);
1340 
1341   return result;
1342 WB_END
1343 
1344 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1345   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1346   BufferBlob* blob;
1347   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1348   if (full_size < size) {
1349     full_size += align_up(size - full_size, oopSize);
1350   }
1351   {
1352     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1353     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1354     ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1355   }
1356   // Track memory usage statistic after releasing CodeCache_lock
1357   MemoryService::track_code_cache_memory_usage();
1358   return blob;
1359 }
1360 
1361 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1362   if (size < 0) {
1363     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1364       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1365   }
1366   return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1367 WB_END
1368 
1369 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1370   if (addr == 0) {
1371     return;
1372   }
1373   BufferBlob::free((BufferBlob*) addr);
1374 WB_END
1375 
1376 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1377   ResourceMark rm;
1378   GrowableArray<CodeBlobStub*> blobs;
1379   {
1380     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1381     CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1382     if (heap == NULL) {
1383       return NULL;
1384     }
1385     for (CodeBlob* cb = (CodeBlob*) heap->first();
1386          cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1387       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1388       new (stub) CodeBlobStub(cb);
1389       blobs.append(stub);
1390     }
1391   }
1392   if (blobs.length() == 0) {
1393     return NULL;
1394   }
1395   ThreadToNativeFromVM ttn(thread);
1396   jobjectArray result = NULL;
1397   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1398   CHECK_JNI_EXCEPTION_(env, NULL);
1399   result = env->NewObjectArray(blobs.length(), clazz, NULL);
1400   CHECK_JNI_EXCEPTION_(env, NULL);
1401   if (result == NULL) {
1402     return result;
1403   }
1404   int i = 0;
1405   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1406        it != blobs.end(); ++it) {
1407     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1408     CHECK_JNI_EXCEPTION_(env, NULL);
1409     env->SetObjectArrayElement(result, i, obj);
1410     CHECK_JNI_EXCEPTION_(env, NULL);
1411     ++i;
1412   }
1413   return result;
1414 WB_END
1415 
1416 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1417   return CompileBroker::get_compilation_activity_mode();
1418 WB_END
1419 
1420 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1421   if (addr == 0) {
1422     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1423       "WB_GetCodeBlob: addr is null");
1424   }
1425   ThreadToNativeFromVM ttn(thread);
1426   CodeBlobStub stub((CodeBlob*) addr);
1427   return codeBlob2objectArray(thread, env, &stub);
1428 WB_END
1429 
1430 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1431   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1432   CHECK_JNI_EXCEPTION_(env, 0);
1433   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1434   return (jlong) mh->method_data();
1435 WB_END
1436 
1437 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1438   return (jlong) Thread::current()->stack_size();
1439 WB_END
1440 
1441 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1442   JavaThread* t = JavaThread::current();
1443   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1444 WB_END
1445 
1446 
1447 int WhiteBox::array_bytes_to_length(size_t bytes) {
1448   return Array<u1>::bytes_to_length(bytes);
1449 }
1450 
1451 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1452   if (size < 0) {
1453     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1454         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1455   }
1456 
1457   oop class_loader_oop = JNIHandles::resolve(class_loader);
1458   ClassLoaderData* cld = class_loader_oop != NULL
1459       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1460       : ClassLoaderData::the_null_class_loader_data();
1461 
1462   void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1463 
1464   return (jlong)(uintptr_t)metadata;
1465 WB_END
1466 
1467 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1468   oop class_loader_oop = JNIHandles::resolve(class_loader);
1469   ClassLoaderData* cld = class_loader_oop != NULL
1470       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1471       : ClassLoaderData::the_null_class_loader_data();
1472 
1473   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1474 WB_END
1475 
1476 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1477                                 jstring version, jstring location, jobjectArray packages))
1478   ResourceMark rm(THREAD);
1479 
1480   objArrayOop packages_oop = objArrayOop(JNIHandles::resolve(packages));
1481   objArrayHandle packages_h(THREAD, packages_oop);
1482   int num_packages = (packages_h == NULL ? 0 : packages_h->length());
1483 
1484   char** pkgs = NULL;
1485   if (num_packages > 0) {
1486     pkgs = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char*, num_packages);
1487     for (int x = 0; x < num_packages; x++) {
1488       oop pkg_str = packages_h->obj_at(x);
1489       if (pkg_str == NULL || !pkg_str->is_a(SystemDictionary::String_klass())) {
1490         THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1491                   err_msg("Bad package name"));
1492       }
1493       pkgs[x] = java_lang_String::as_utf8_string(pkg_str);
1494     }
1495   }
1496   Modules::define_module(module, is_open, version, location, (const char* const*)pkgs, num_packages, CHECK);
1497 WB_END
1498 
1499 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1500   ResourceMark rm(THREAD);
1501   char* package_name = NULL;
1502   if (package != NULL) {
1503       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1504   }
1505   Modules::add_module_exports_qualified(from_module, package_name, to_module, CHECK);
1506 WB_END
1507 
1508 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1509   ResourceMark rm(THREAD);
1510   char* package_name = NULL;
1511   if (package != NULL) {
1512       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1513   }
1514   Modules::add_module_exports_to_all_unnamed(module, package_name, CHECK);
1515 WB_END
1516 
1517 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1518   ResourceMark rm(THREAD);
1519   char* package_name = NULL;
1520   if (package != NULL) {
1521       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1522   }
1523   Modules::add_module_exports(module, package_name, NULL, CHECK);
1524 WB_END
1525 
1526 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1527   Modules::add_reads_module(from_module, source_module, CHECK);
1528 WB_END
1529 
1530 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1531   if (inc < 0) {
1532     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1533         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1534   }
1535 
1536   jlong max_size_t = (jlong) ((size_t) -1);
1537   if (inc > max_size_t) {
1538     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1539         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1540   }
1541 
1542   size_t new_cap_until_GC = 0;
1543   size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1544   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1545   if (!success) {
1546     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1547                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1548                 "due to contention with another thread");
1549   }
1550   return (jlong) new_cap_until_GC;
1551 WB_END
1552 
1553 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1554   return (jlong) MetaspaceGC::capacity_until_GC();
1555 WB_END
1556 
1557 WB_ENTRY(jboolean, WB_MetaspaceShouldConcurrentCollect(JNIEnv* env, jobject wb))
1558   return MetaspaceGC::should_concurrent_collect();
1559 WB_END
1560 
1561 WB_ENTRY(jlong, WB_MetaspaceReserveAlignment(JNIEnv* env, jobject wb))
1562   return (jlong)Metaspace::reserve_alignment();
1563 WB_END
1564 
1565 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1566   Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1567                                            Monitor::_safepoint_check_always :
1568                                            Monitor::_safepoint_check_never;
1569   MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1570                    attemptedNoSafepointValue == JNI_TRUE);
1571 WB_END
1572 
1573 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1574   oop obj_oop = JNIHandles::resolve(obj);
1575   return (jboolean) obj_oop->mark()->has_monitor();
1576 WB_END
1577 
1578 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1579   VM_ForceSafepoint force_safepoint_op;
1580   VMThread::execute(&force_safepoint_op);
1581 WB_END
1582 
1583 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1584   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1585   return (jlong) ik->constants();
1586 WB_END
1587 
1588 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1589   return ConstantPool::CPCACHE_INDEX_TAG;
1590 WB_END
1591 
1592 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1593   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1594   ConstantPool* cp = ik->constants();
1595   if (cp->cache() == NULL) {
1596       return -1;
1597   }
1598   return cp->cache()->length();
1599 WB_END
1600 
1601 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1602   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1603   ConstantPool* cp = ik->constants();
1604   if (cp->cache() == NULL) {
1605     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1606   }
1607   jint cpci = index;
1608   jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1609   if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1610     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1611   }
1612   jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1613   return cpi;
1614 WB_END
1615 
1616 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1617   return ConstantPool::encode_invokedynamic_index(index);
1618 WB_END
1619 
1620 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1621   VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1622   VMThread::execute(&clear_ics);
1623 WB_END
1624 
1625 template <typename T>
1626 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1627   assert(value != NULL, "sanity");
1628   if (method == NULL || name == NULL) {
1629     return false;
1630   }
1631   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1632   CHECK_JNI_EXCEPTION_(env, false);
1633   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1634   // can't be in VM when we call JNI
1635   ThreadToNativeFromVM ttnfv(thread);
1636   const char* flag_name = env->GetStringUTFChars(name, NULL);
1637   CHECK_JNI_EXCEPTION_(env, false);
1638   bool result =  CompilerOracle::has_option_value(mh, flag_name, *value);
1639   env->ReleaseStringUTFChars(name, flag_name);
1640   return result;
1641 }
1642 
1643 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1644   bool result;
1645   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1646     // can't be in VM when we call JNI
1647     ThreadToNativeFromVM ttnfv(thread);
1648     return booleanBox(thread, env, result);
1649   }
1650   return NULL;
1651 WB_END
1652 
1653 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1654   intx result;
1655   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1656     // can't be in VM when we call JNI
1657     ThreadToNativeFromVM ttnfv(thread);
1658     return longBox(thread, env, result);
1659   }
1660   return NULL;
1661 WB_END
1662 
1663 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1664   uintx result;
1665   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1666     // can't be in VM when we call JNI
1667     ThreadToNativeFromVM ttnfv(thread);
1668     return longBox(thread, env, result);
1669   }
1670   return NULL;
1671 WB_END
1672 
1673 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1674   double result;
1675   if (GetMethodOption <double> (thread, env, method, name, &result)) {
1676     // can't be in VM when we call JNI
1677     ThreadToNativeFromVM ttnfv(thread);
1678     return doubleBox(thread, env, result);
1679   }
1680   return NULL;
1681 WB_END
1682 
1683 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1684   ccstr ccstrResult;
1685   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1686     // can't be in VM when we call JNI
1687     ThreadToNativeFromVM ttnfv(thread);
1688     jstring result = env->NewStringUTF(ccstrResult);
1689     CHECK_JNI_EXCEPTION_(env, NULL);
1690     return result;
1691   }
1692   return NULL;
1693 WB_END
1694 
1695 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1696   oop obj_oop = JNIHandles::resolve(obj);
1697   return oopDesc::is_archive_object(obj_oop);
1698 WB_END
1699 
1700 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1701   return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1702 WB_END
1703 
1704 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1705   return !StringTable::shared_string_mapped();
1706 WB_END
1707 
1708 WB_ENTRY(jobject, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass clazz))
1709   Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1710   if (k->is_instance_klass()) {
1711     InstanceKlass *ik = InstanceKlass::cast(k);
1712     ConstantPool *cp = ik->constants();
1713     objArrayOop refs =  cp->resolved_references();
1714     return (jobject)JNIHandles::make_local(env, refs);
1715   } else {
1716     return NULL;
1717   }
1718 WB_END
1719 
1720 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
1721   return MetaspaceShared::open_archive_heap_region_mapped();
1722 WB_END
1723 
1724 WB_ENTRY(jboolean, WB_IsCDSIncludedInVmBuild(JNIEnv* env))
1725 #if INCLUDE_CDS
1726   return true;
1727 #else
1728   return false;
1729 #endif
1730 WB_END
1731 
1732 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
1733   class TraceSelfClosure : public ThreadClosure {
1734     jint _num_threads_completed;
1735 
1736     void do_thread(Thread* th) {
1737       assert(th->is_Java_thread(), "sanity");
1738       JavaThread* jt = (JavaThread*)th;
1739       ResourceMark rm;
1740 
1741       jt->print_on(tty);
1742       jt->print_stack_on(tty);
1743       tty->cr();
1744       Atomic::inc(&_num_threads_completed);
1745     }
1746 
1747   public:
1748     TraceSelfClosure() : _num_threads_completed(0) {}
1749 
1750     jint num_threads_completed() const { return _num_threads_completed; }
1751   };
1752   TraceSelfClosure tsc;
1753 
1754   if (all_threads) {
1755     Handshake::execute(&tsc);
1756   } else {
1757     oop thread_oop = JNIHandles::resolve(thread_handle);
1758     if (thread_oop != NULL) {
1759       JavaThread* target = java_lang_Thread::thread(thread_oop);
1760       Handshake::execute(&tsc, target);
1761     }
1762   }
1763   return tsc.num_threads_completed();
1764 WB_END
1765 
1766 //Some convenience methods to deal with objects from java
1767 int WhiteBox::offset_for_field(const char* field_name, oop object,
1768     Symbol* signature_symbol) {
1769   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1770   Thread* THREAD = Thread::current();
1771 
1772   //Get the class of our object
1773   Klass* arg_klass = object->klass();
1774   //Turn it into an instance-klass
1775   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1776 
1777   //Create symbols to look for in the class
1778   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1779       THREAD);
1780 
1781   //To be filled in with an offset of the field we're looking for
1782   fieldDescriptor fd;
1783 
1784   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1785   if (res == NULL) {
1786     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1787         name_symbol->as_C_string());
1788     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
1789   }
1790 
1791   //fetch the field at the offset we've found
1792   int dest_offset = fd.offset();
1793 
1794   return dest_offset;
1795 }
1796 
1797 
1798 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1799   int offset = offset_for_field(field_name, object,
1800       vmSymbols::string_signature());
1801   oop string = object->obj_field(offset);
1802   if (string == NULL) {
1803     return NULL;
1804   }
1805   const char* ret = java_lang_String::as_utf8_string(string);
1806   return ret;
1807 }
1808 
1809 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1810   int offset =
1811       offset_for_field(field_name, object, vmSymbols::bool_signature());
1812   bool ret = (object->bool_field(offset) == JNI_TRUE);
1813   return ret;
1814 }
1815 
1816 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1817   ResourceMark rm;
1818   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1819 
1820   //  one by one registration natives for exception catching
1821   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1822   CHECK_JNI_EXCEPTION(env);
1823   for (int i = 0, n = method_count; i < n; ++i) {
1824     // Skip dummy entries
1825     if (method_array[i].fnPtr == NULL) continue;
1826     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1827       jthrowable throwable_obj = env->ExceptionOccurred();
1828       if (throwable_obj != NULL) {
1829         env->ExceptionClear();
1830         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1831           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1832           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1833           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1834               method_array[i].name, method_array[i].signature);
1835         }
1836       } else {
1837         // Registration failed unexpectedly.
1838         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1839             method_array[i].name, method_array[i].signature);
1840         env->UnregisterNatives(wbclass);
1841         break;
1842       }
1843     }
1844   }
1845 }
1846 
1847 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
1848   // can't be in VM when we call JNI
1849   ThreadToNativeFromVM ttnfv(thread);
1850   const char* dir = env->GetStringUTFChars(compDirect, NULL);
1851   CHECK_JNI_EXCEPTION_(env, 0);
1852   int ret;
1853   {
1854     ThreadInVMfromNative ttvfn(thread); // back to VM
1855     ret = DirectivesParser::parse_string(dir, tty);
1856   }
1857   env->ReleaseStringUTFChars(compDirect, dir);
1858   // -1 for error parsing directive. Return 0 as number of directives added.
1859   if (ret == -1) {
1860     ret = 0;
1861   }
1862   return (jint) ret;
1863 WB_END
1864 
1865 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
1866   DirectivesStack::pop(count);
1867 WB_END
1868 
1869 // Checks that the library libfile has the noexecstack bit set.
1870 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
1871   jboolean ret = false;
1872 #ifdef LINUX
1873   // Can't be in VM when we call JNI.
1874   ThreadToNativeFromVM ttnfv(thread);
1875   const char* lf = env->GetStringUTFChars(libfile, NULL);
1876   CHECK_JNI_EXCEPTION_(env, 0);
1877   ret = (jboolean) ElfFile::specifies_noexecstack(lf);
1878   env->ReleaseStringUTFChars(libfile, lf);
1879 #endif
1880   return ret;
1881 WB_END
1882 
1883 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
1884   LINUX_ONLY(return OSContainer::is_containerized();)
1885   return false;
1886 WB_END
1887 
1888 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
1889   os::print_os_info(tty);
1890 WB_END
1891 
1892 
1893 #define CC (char*)
1894 
1895 static JNINativeMethod methods[] = {
1896   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
1897   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
1898   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
1899   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
1900   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
1901   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
1902   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
1903   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
1904   {CC"getHeapAlignment",                 CC"()J",                   (void*)&WB_GetHeapAlignment},
1905   {CC"isClassAlive0",                    CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
1906   {CC"parseCommandLine0",
1907       CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1908       (void*) &WB_ParseCommandLine
1909   },
1910   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1911                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
1912   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
1913                                                       (void*)&WB_AddToSystemClassLoaderSearch},
1914   {CC"getCompressedOopsMaxHeapSize", CC"()J",
1915       (void*)&WB_GetCompressedOopsMaxHeapSize},
1916   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
1917   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
1918   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
1919   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
1920 #if INCLUDE_ALL_GCS
1921   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
1922   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
1923   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
1924   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
1925   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
1926   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
1927   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
1928   {CC"g1StartConcMarkCycle",       CC"()Z",           (void*)&WB_G1StartMarkCycle  },
1929   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1930                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
1931   {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
1932   {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
1933   {CC"g1GetMixedGCInfo",   CC"(I)[J",                 (void*)&WB_G1GetMixedGCInfo },
1934 #endif // INCLUDE_ALL_GCS
1935 #if INCLUDE_NMT
1936   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
1937   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
1938   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
1939   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
1940   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
1941   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
1942   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
1943   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
1944   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
1945 #endif // INCLUDE_NMT
1946   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
1947   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
1948   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
1949                                                       (void*)&WB_DeoptimizeMethod  },
1950   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
1951                                                       (void*)&WB_IsMethodCompiled  },
1952   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1953                                                       (void*)&WB_IsMethodCompilable},
1954   {CC"isMethodQueuedForCompilation0",
1955       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
1956   {CC"isIntrinsicAvailable0",
1957       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1958                                                       (void*)&WB_IsIntrinsicAvailable},
1959   {CC"makeMethodNotCompilable0",
1960       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
1961   {CC"testSetDontInlineMethod0",
1962       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
1963   {CC"getMethodCompilationLevel0",
1964       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
1965   {CC"getMethodEntryBci0",
1966       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
1967   {CC"getCompileQueueSize",
1968       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
1969   {CC"testSetForceInlineMethod0",
1970       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
1971   {CC"enqueueMethodForCompilation0",
1972       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
1973   {CC"enqueueInitializerForCompilation0",
1974       CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
1975   {CC"clearMethodState0",
1976       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
1977   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
1978   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
1979   {CC"matchesMethod",
1980       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1981                                                       (void*)&WB_MatchesMethod},
1982   {CC"matchesInline",
1983       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1984                                                       (void*)&WB_MatchesInline},
1985   {CC"shouldPrintAssembly",
1986         CC"(Ljava/lang/reflect/Executable;I)Z",
1987                                                         (void*)&WB_ShouldPrintAssembly},
1988 
1989   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1990   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1991   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1992   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1993   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1994   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1995   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1996   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1997   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1998   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1999   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
2000                                                       (void*)&WB_SetStringVMFlag},
2001   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
2002                                                       (void*)&WB_GetBooleanVMFlag},
2003   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
2004                                                       (void*)&WB_GetIntVMFlag},
2005   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
2006                                                       (void*)&WB_GetUintVMFlag},
2007   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
2008                                                       (void*)&WB_GetIntxVMFlag},
2009   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
2010                                                       (void*)&WB_GetUintxVMFlag},
2011   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
2012                                                       (void*)&WB_GetUint64VMFlag},
2013   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
2014                                                       (void*)&WB_GetSizeTVMFlag},
2015   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
2016                                                       (void*)&WB_GetDoubleVMFlag},
2017   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
2018                                                       (void*)&WB_GetStringVMFlag},
2019   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
2020   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
2021   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
2022   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
2023   {CC"allocateMetaspace",
2024      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
2025   {CC"freeMetaspace",
2026      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
2027   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
2028   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
2029   {CC"metaspaceShouldConcurrentCollect", CC"()Z",     (void*)&WB_MetaspaceShouldConcurrentCollect },
2030   {CC"metaspaceReserveAlignment", CC"()J",            (void*)&WB_MetaspaceReserveAlignment },
2031   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
2032   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
2033                                                       (void*)&WB_GetNMethod         },
2034   {CC"forceNMethodSweep",  CC"()V",                   (void*)&WB_ForceNMethodSweep  },
2035   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
2036   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
2037   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
2038   {CC"getCompilationActivityMode",
2039                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
2040   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
2041                                                       (void*)&WB_GetMethodData      },
2042   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
2043   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
2044   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
2045   {CC"DefineModule",       CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
2046                                                       (void*)&WB_DefineModule },
2047   {CC"AddModuleExports",   CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
2048                                                       (void*)&WB_AddModuleExports },
2049   {CC"AddReadsModule",     CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
2050                                                       (void*)&WB_AddReadsModule },
2051   {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2052                                                       (void*)&WB_AddModuleExportsToAllUnnamed },
2053   {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2054                                                       (void*)&WB_AddModuleExportsToAll },
2055   {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
2056   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
2057   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
2058   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
2059   {CC"getConstantPoolCacheIndexTag0", CC"()I",  (void*)&WB_GetConstantPoolCacheIndexTag},
2060   {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_GetConstantPoolCacheLength},
2061   {CC"remapInstructionOperandFromCPCache0",
2062       CC"(Ljava/lang/Class;I)I",                      (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
2063   {CC"encodeConstantPoolIndyIndex0",
2064       CC"(I)I",                      (void*)&WB_ConstantPoolEncodeIndyIndex},
2065   {CC"getMethodBooleanOption",
2066       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
2067                                                       (void*)&WB_GetMethodBooleaneOption},
2068   {CC"getMethodIntxOption",
2069       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2070                                                       (void*)&WB_GetMethodIntxOption},
2071   {CC"getMethodUintxOption",
2072       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2073                                                       (void*)&WB_GetMethodUintxOption},
2074   {CC"getMethodDoubleOption",
2075       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
2076                                                       (void*)&WB_GetMethodDoubleOption},
2077   {CC"getMethodStringOption",
2078       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
2079                                                       (void*)&WB_GetMethodStringOption},
2080   {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
2081   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
2082   {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
2083   {CC"getResolvedReferences", CC"(Ljava/lang/Class;)Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
2084   {CC"areOpenArchiveHeapObjectsMapped",   CC"()Z",    (void*)&WB_AreOpenArchiveHeapObjectsMapped},
2085   {CC"isCDSIncludedInVmBuild",            CC"()Z",    (void*)&WB_IsCDSIncludedInVmBuild },
2086   {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
2087   {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
2088   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
2089                                                       (void*)&WB_AddCompilerDirective },
2090   {CC"removeCompilerDirective",   CC"(I)V",             (void*)&WB_RemoveCompilerDirective },
2091   {CC"currentGC",                 CC"()I",            (void*)&WB_CurrentGC},
2092   {CC"allSupportedGC",            CC"()I",            (void*)&WB_AllSupportedGC},
2093   {CC"gcSelectedByErgo",          CC"()Z",            (void*)&WB_GCSelectedByErgo},
2094   {CC"supportsConcurrentGCPhaseControl", CC"()Z",     (void*)&WB_SupportsConcurrentGCPhaseControl},
2095   {CC"getConcurrentGCPhases",     CC"()[Ljava/lang/String;",
2096                                                       (void*)&WB_GetConcurrentGCPhases},
2097   {CC"requestConcurrentGCPhase0", CC"(Ljava/lang/String;)Z",
2098                                                       (void*)&WB_RequestConcurrentGCPhase},
2099   {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
2100                                                       (void*)&WB_CheckLibSpecifiesNoexecstack},
2101   {CC"isContainerized",           CC"()Z",            (void*)&WB_IsContainerized },
2102   {CC"printOsInfo",               CC"()V",            (void*)&WB_PrintOsInfo },
2103 };
2104 
2105 
2106 #undef CC
2107 
2108 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
2109   {
2110     if (WhiteBoxAPI) {
2111       // Make sure that wbclass is loaded by the null classloader
2112       InstanceKlass* ik = InstanceKlass::cast(JNIHandles::resolve(wbclass)->klass());
2113       Handle loader(THREAD, ik->class_loader());
2114       if (loader.is_null()) {
2115         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
2116         WhiteBox::register_extended(env, wbclass, thread);
2117         WhiteBox::set_used();
2118       }
2119     }
2120   }
2121 JVM_END