1 /*
   2  * Copyright (c) 2012, 2019, 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/classLoaderDataGraph.hpp"
  30 #include "classfile/modules.hpp"
  31 #include "classfile/protectionDomainCache.hpp"
  32 #include "classfile/stringTable.hpp"
  33 #include "classfile/symbolTable.hpp"
  34 #include "code/codeCache.hpp"
  35 #include "compiler/compilationPolicy.hpp"
  36 #include "compiler/methodMatcher.hpp"
  37 #include "compiler/directivesParser.hpp"
  38 #include "gc/shared/gcConfig.hpp"
  39 #include "gc/shared/genArguments.hpp"
  40 #include "gc/shared/genCollectedHeap.hpp"
  41 #include "jvmtifiles/jvmtiEnv.hpp"
  42 #include "memory/filemap.hpp"
  43 #include "memory/heapShared.inline.hpp"
  44 #include "memory/metaspaceShared.hpp"
  45 #include "memory/metadataFactory.hpp"
  46 #include "memory/iterator.hpp"
  47 #include "memory/resourceArea.hpp"
  48 #include "memory/universe.hpp"
  49 #include "memory/oopFactory.hpp"
  50 #include "oops/array.hpp"
  51 #include "oops/compressedOops.hpp"
  52 #include "oops/constantPool.inline.hpp"
  53 #include "oops/method.inline.hpp"
  54 #include "oops/objArrayKlass.hpp"
  55 #include "oops/objArrayOop.inline.hpp"
  56 #include "oops/oop.inline.hpp"
  57 #include "oops/typeArrayOop.inline.hpp"
  58 #include "prims/resolvedMethodTable.hpp"
  59 #include "prims/wbtestmethods/parserTests.hpp"
  60 #include "prims/whitebox.inline.hpp"
  61 #include "runtime/arguments.hpp"
  62 #include "runtime/deoptimization.hpp"
  63 #include "runtime/fieldDescriptor.inline.hpp"
  64 #include "runtime/flags/jvmFlag.hpp"
  65 #include "runtime/frame.inline.hpp"
  66 #include "runtime/handles.inline.hpp"
  67 #include "runtime/handshake.hpp"
  68 #include "runtime/interfaceSupport.inline.hpp"
  69 #include "runtime/javaCalls.hpp"
  70 #include "runtime/jniHandles.inline.hpp"
  71 #include "runtime/os.hpp"
  72 #include "runtime/sweeper.hpp"
  73 #include "runtime/synchronizer.hpp"
  74 #include "runtime/thread.hpp"
  75 #include "runtime/threadSMR.hpp"
  76 #include "runtime/vm_version.hpp"
  77 #include "services/memoryService.hpp"
  78 #include "utilities/align.hpp"
  79 #include "utilities/debug.hpp"
  80 #include "utilities/elfFile.hpp"
  81 #include "utilities/exceptions.hpp"
  82 #include "utilities/macros.hpp"
  83 #if INCLUDE_CDS
  84 #include "prims/cdsoffsets.hpp"
  85 #endif // INCLUDE_CDS
  86 #if INCLUDE_G1GC
  87 #include "gc/g1/g1Arguments.hpp"
  88 #include "gc/g1/g1CollectedHeap.inline.hpp"
  89 #include "gc/g1/g1ConcurrentMark.hpp"
  90 #include "gc/g1/g1ConcurrentMarkThread.hpp"
  91 #include "gc/g1/heapRegionRemSet.hpp"
  92 #include "gc/g1/heterogeneousHeapRegionManager.hpp"
  93 #endif // INCLUDE_G1GC
  94 #if INCLUDE_PARALLELGC
  95 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
  96 #include "gc/parallel/adjoiningGenerations.hpp"
  97 #endif // INCLUDE_PARALLELGC
  98 #if INCLUDE_NMT
  99 #include "services/mallocSiteTable.hpp"
 100 #include "services/memTracker.hpp"
 101 #include "utilities/nativeCallStack.hpp"
 102 #endif // INCLUDE_NMT
 103 #if INCLUDE_AOT
 104 #include "aot/aotLoader.hpp"
 105 #endif // INCLUDE_AOT
 106 
 107 #ifdef LINUX
 108 #include "osContainer_linux.hpp"
 109 #endif
 110 
 111 #define SIZE_T_MAX_VALUE ((size_t) -1)
 112 
 113 #define CHECK_JNI_EXCEPTION_(env, value)                               \
 114   do {                                                                 \
 115     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
 116     THREAD->clear_pending_jni_exception_check();                       \
 117     if (HAS_PENDING_EXCEPTION) {                                       \
 118       return(value);                                                   \
 119     }                                                                  \
 120   } while (0)
 121 
 122 #define CHECK_JNI_EXCEPTION(env)                                       \
 123   do {                                                                 \
 124     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
 125     THREAD->clear_pending_jni_exception_check();                       \
 126     if (HAS_PENDING_EXCEPTION) {                                       \
 127       return;                                                          \
 128     }                                                                  \
 129   } while (0)
 130 
 131 bool WhiteBox::_used = false;
 132 volatile bool WhiteBox::compilation_locked = false;
 133 
 134 class VM_WhiteBoxOperation : public VM_Operation {
 135  public:
 136   VM_WhiteBoxOperation()                         { }
 137   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
 138   bool allow_nested_vm_operations() const        { return true; }
 139 };
 140 
 141 
 142 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
 143   return (jlong)(void*)JNIHandles::resolve(obj);
 144 WB_END
 145 
 146 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
 147   return heapOopSize;
 148 WB_END
 149 
 150 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
 151   return os::vm_page_size();
 152 WB_END
 153 
 154 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
 155   return os::vm_allocation_granularity();
 156 WB_END
 157 
 158 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
 159   return os::large_page_size();
 160 WB_END
 161 
 162 class WBIsKlassAliveClosure : public LockedClassesDo {
 163     Symbol* _name;
 164     bool _found;
 165 public:
 166     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
 167 
 168     void do_klass(Klass* k) {
 169       if (_found) return;
 170       Symbol* ksym = k->name();
 171       if (ksym->fast_compare(_name) == 0) {
 172         _found = true;
 173       }
 174     }
 175 
 176     bool found() const {
 177         return _found;
 178     }
 179 };
 180 
 181 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
 182   oop h_name = JNIHandles::resolve(name);
 183   if (h_name == NULL) return false;
 184   Symbol* sym = java_lang_String::as_symbol(h_name);
 185   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 186 
 187   WBIsKlassAliveClosure closure(sym);
 188   ClassLoaderDataGraph::classes_do(&closure);
 189 
 190   return closure.found();
 191 WB_END
 192 
 193 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
 194   oop h_name = JNIHandles::resolve(name);
 195   if (h_name == NULL) return false;
 196   Symbol* sym = java_lang_String::as_symbol(h_name);
 197   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 198   return (jint)sym->refcount();
 199 WB_END
 200 
 201 
 202 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 203 #if INCLUDE_JVMTI
 204   ResourceMark rm;
 205   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 206   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 207   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 208   assert(err == JVMTI_ERROR_NONE, "must not fail");
 209 #endif
 210 }
 211 WB_END
 212 
 213 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 214 #if INCLUDE_JVMTI
 215   ResourceMark rm;
 216   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 217   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 218   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 219   assert(err == JVMTI_ERROR_NONE, "must not fail");
 220 #endif
 221 }
 222 WB_END
 223 
 224 
 225 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 226   return (jlong)Arguments::max_heap_for_compressed_oops();
 227 }
 228 WB_END
 229 
 230 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 231   tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap " SIZE_FORMAT " "
 232                 "Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
 233                 MinHeapSize,
 234                 InitialHeapSize,
 235                 MaxHeapSize,
 236                 SpaceAlignment,
 237                 HeapAlignment);
 238 }
 239 WB_END
 240 
 241 #ifndef PRODUCT
 242 // Forward declaration
 243 void TestReservedSpace_test();
 244 void TestReserveMemorySpecial_test();
 245 void TestVirtualSpace_test();
 246 #endif
 247 
 248 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 249 #ifndef PRODUCT
 250   TestReservedSpace_test();
 251   TestReserveMemorySpecial_test();
 252   TestVirtualSpace_test();
 253 #endif
 254 WB_END
 255 
 256 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 257   size_t granularity = os::vm_allocation_granularity();
 258   ReservedHeapSpace rhs(100 * granularity, granularity, false);
 259   VirtualSpace vs;
 260   vs.initialize(rhs, 50 * granularity);
 261 
 262   // Check if constraints are complied
 263   if (!( UseCompressedOops && rhs.base() != NULL &&
 264          CompressedOops::base() != NULL &&
 265          CompressedOops::use_implicit_null_checks() )) {
 266     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 267                   "\tUseCompressedOops is %d\n"
 268                   "\trhs.base() is " PTR_FORMAT "\n"
 269                   "\tCompressedOops::base() is " PTR_FORMAT "\n"
 270                   "\tCompressedOops::use_implicit_null_checks() is %d",
 271                   UseCompressedOops,
 272                   p2i(rhs.base()),
 273                   p2i(CompressedOops::base()),
 274                   CompressedOops::use_implicit_null_checks());
 275     return;
 276   }
 277   tty->print_cr("Reading from no access area... ");
 278   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 279                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 280 WB_END
 281 
 282 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 283                                            size_t magnitude, size_t iterations) {
 284   size_t granularity = os::vm_allocation_granularity();
 285   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
 286   VirtualSpace vs;
 287   if (!vs.initialize(rhs, 0)) {
 288     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 289     return 3;
 290   }
 291 
 292   int seed = os::random();
 293   tty->print_cr("Random seed is %d", seed);
 294   os::init_random(seed);
 295 
 296   for (size_t i = 0; i < iterations; i++) {
 297 
 298     // Whether we will shrink or grow
 299     bool shrink = os::random() % 2L == 0;
 300 
 301     // Get random delta to resize virtual space
 302     size_t delta = (size_t)os::random() % magnitude;
 303 
 304     // If we are about to shrink virtual space below zero, then expand instead
 305     if (shrink && vs.committed_size() < delta) {
 306       shrink = false;
 307     }
 308 
 309     // Resizing by delta
 310     if (shrink) {
 311       vs.shrink_by(delta);
 312     } else {
 313       // If expanding fails expand_by will silently return false
 314       vs.expand_by(delta, true);
 315     }
 316   }
 317   return 0;
 318 }
 319 
 320 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 321         jlong reserved_space_size, jlong magnitude, jlong iterations))
 322   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 323                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 324                 iterations);
 325   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 326     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 327     return 1;
 328   }
 329 
 330   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 331   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 332   if (sizeof(size_t) < sizeof(jlong)) {
 333     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 334     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 335         || iterations > size_t_max_value) {
 336       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 337       return 2;
 338     }
 339   }
 340 
 341   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 342                                         (size_t) magnitude, (size_t) iterations);
 343 WB_END
 344 
 345 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
 346   return GCConfig::is_gc_supported((CollectedHeap::Name)name);
 347 WB_END
 348 
 349 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
 350   return GCConfig::is_gc_selected((CollectedHeap::Name)name);
 351 WB_END
 352 
 353 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
 354   return GCConfig::is_gc_selected_ergonomically();
 355 WB_END
 356 
 357 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 358   oop p = JNIHandles::resolve(obj);
 359 #if INCLUDE_G1GC
 360   if (UseG1GC) {
 361     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 362     const HeapRegion* hr = g1h->heap_region_containing(p);
 363     if (hr == NULL) {
 364       return false;
 365     }
 366     return !(hr->is_young());
 367   }
 368 #endif
 369 #if INCLUDE_PARALLELGC
 370   if (UseParallelGC) {
 371     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 372     return !psh->is_in_young(p);
 373   }
 374 #endif
 375 #if INCLUDE_ZGC
 376   if (UseZGC) {
 377     return Universe::heap()->is_in(p);
 378   }
 379 #endif
 380   GenCollectedHeap* gch = GenCollectedHeap::heap();
 381   return !gch->is_in_young(p);
 382 WB_END
 383 
 384 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 385   oop p = JNIHandles::resolve(obj);
 386   return Universe::heap()->obj_size(p) * HeapWordSize;
 387 WB_END
 388 
 389 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 390   return (jlong)SpaceAlignment;
 391 WB_END
 392 
 393 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
 394   return (jlong)HeapAlignment;
 395 WB_END
 396 
 397 WB_ENTRY(jboolean, WB_SupportsConcurrentGCPhaseControl(JNIEnv* env, jobject o))
 398   return Universe::heap()->supports_concurrent_phase_control();
 399 WB_END
 400 
 401 WB_ENTRY(jboolean, WB_RequestConcurrentGCPhase(JNIEnv* env, jobject o, jstring name))
 402   Handle h_name(THREAD, JNIHandles::resolve(name));
 403   ResourceMark rm;
 404   const char* c_name = java_lang_String::as_utf8_string(h_name());
 405   return Universe::heap()->request_concurrent_phase(c_name);
 406 WB_END
 407 
 408 #if INCLUDE_G1GC
 409 
 410 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 411   if (UseG1GC) {
 412     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 413     oop result = JNIHandles::resolve(obj);
 414     const HeapRegion* hr = g1h->heap_region_containing(result);
 415     return hr->is_humongous();
 416   }
 417   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
 418 WB_END
 419 
 420 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 421   if (UseG1GC) {
 422     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 423     const HeapRegion* hr = g1h->heap_region_containing((void*) addr);
 424     return hr->is_humongous();
 425   }
 426   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
 427 WB_END
 428 
 429 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 430   if (UseG1GC) {
 431     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 432     const HeapRegion* hr = g1h->heap_region_containing((void*) addr);
 433     return hr->is_free();
 434   }
 435   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
 436 WB_END
 437 
 438 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 439   if (UseG1GC) {
 440     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 441     size_t nr = g1h->max_regions();
 442     return (jlong)nr;
 443   }
 444   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
 445 WB_END
 446 
 447 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 448   if (UseG1GC) {
 449     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 450     size_t nr = g1h->num_free_regions();
 451     return (jlong)nr;
 452   }
 453   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
 454 WB_END
 455 
 456 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 457   if (UseG1GC) {
 458     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 459     return g1h->concurrent_mark()->cm_thread()->during_cycle();
 460   }
 461   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
 462 WB_END
 463 
 464 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
 465   if (UseG1GC) {
 466     if (AsyncDeflateIdleMonitors) {
 467       // AsyncDeflateIdleMonitors needs to know when System.gc() or
 468       // the equivalent is called so any special clean up can be done
 469       // at a safepoint, e.g., TestHumongousClassLoader.java.
 470       ObjectSynchronizer::set_is_special_deflation_requested(true);
 471     }
 472     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 473     if (!g1h->concurrent_mark()->cm_thread()->during_cycle()) {
 474       g1h->collect(GCCause::_wb_conc_mark);
 475       return true;
 476     }
 477     return false;
 478   }
 479   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1StartMarkCycle: G1 GC is not enabled");
 480 WB_END
 481 
 482 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 483   if (UseG1GC) {
 484     return (jint)HeapRegion::GrainBytes;
 485   }
 486   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
 487 WB_END
 488 
 489 #endif // INCLUDE_G1GC
 490 
 491 #if INCLUDE_G1GC || INCLUDE_PARALLELGC
 492 WB_ENTRY(jlong, WB_DramReservedStart(JNIEnv* env, jobject o))
 493 #if INCLUDE_G1GC
 494   if (UseG1GC) {
 495     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 496     if (g1h->is_heterogeneous_heap()) {
 497       uint start_region = HeterogeneousHeapRegionManager::manager()->start_index_of_dram();
 498       return (jlong)(g1h->base() + start_region * HeapRegion::GrainBytes);
 499     } else {
 500       return (jlong)g1h->base();
 501     }
 502   }
 503 #endif // INCLUDE_G1GC
 504 #if INCLUDE_PARALLELGC
 505   if (UseParallelGC) {
 506     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 507     if (AllocateOldGenAt != NULL) {
 508       MemRegion reserved = ps_heap->young_gen()->reserved();
 509       return (jlong)reserved.start();
 510     } else {
 511       return (jlong)ps_heap->base();
 512     }
 513   }
 514 #endif // INCLUDE_PARALLELGC
 515   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_DramReservedStart: enabled only for G1 and Parallel GC");
 516 WB_END
 517 
 518 WB_ENTRY(jlong, WB_DramReservedEnd(JNIEnv* env, jobject o))
 519 #if INCLUDE_G1GC
 520   if (UseG1GC) {
 521     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 522     if (g1h->is_heterogeneous_heap()) {
 523       uint end_region = HeterogeneousHeapRegionManager::manager()->end_index_of_dram();
 524       return (jlong)(g1h->base() + (end_region + 1) * HeapRegion::GrainBytes - 1);
 525     } else {
 526       return (jlong)g1h->base() + G1Arguments::heap_max_size_bytes();
 527     }
 528   }
 529 #endif // INCLUDE_G1GC
 530 #if INCLUDE_PARALLELGC
 531   if (UseParallelGC) {
 532     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 533     if (AllocateOldGenAt != NULL) {
 534       MemRegion reserved = ps_heap->young_gen()->reserved();
 535       return (jlong)reserved.end();
 536     } else {
 537       return (jlong)ps_heap->reserved_region().end();
 538     }
 539   }
 540 #endif // INCLUDE_PARALLELGC
 541   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_DramReservedEnd: enabled only for G1 and Parallel GC");
 542 WB_END
 543 
 544 WB_ENTRY(jlong, WB_NvdimmReservedStart(JNIEnv* env, jobject o))
 545 #if INCLUDE_G1GC
 546   if (UseG1GC) {
 547     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 548     if (g1h->is_heterogeneous_heap()) {
 549       uint start_region = HeterogeneousHeapRegionManager::manager()->start_index_of_nvdimm();
 550       return (jlong)(g1h->base() + start_region * HeapRegion::GrainBytes);
 551     } else {
 552       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedStart: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 553     }
 554   }
 555 #endif // INCLUDE_G1GC
 556 #if INCLUDE_PARALLELGC
 557   if (UseParallelGC) {
 558     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 559     if (AllocateOldGenAt != NULL) {
 560       MemRegion reserved = ps_heap->old_gen()->reserved();
 561       return (jlong)reserved.start();
 562     } else {
 563       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedStart: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 564     }
 565   }
 566 #endif // INCLUDE_PARALLELGC
 567   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedStart: enabled only for G1 and Parallel GC");
 568 WB_END
 569 
 570 WB_ENTRY(jlong, WB_NvdimmReservedEnd(JNIEnv* env, jobject o))
 571 #if INCLUDE_G1GC
 572   if (UseG1GC) {
 573     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 574     if (g1h->is_heterogeneous_heap()) {
 575       uint end_region = HeterogeneousHeapRegionManager::manager()->start_index_of_nvdimm();
 576       return (jlong)(g1h->base() + (end_region + 1) * HeapRegion::GrainBytes - 1);
 577     } else {
 578       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedEnd: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 579     }
 580   }
 581 #endif // INCLUDE_G1GC
 582 #if INCLUDE_PARALLELGC
 583   if (UseParallelGC) {
 584     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 585     if (AllocateOldGenAt != NULL) {
 586       MemRegion reserved = ps_heap->old_gen()->reserved();
 587       return (jlong)reserved.end();
 588       } else {
 589       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedEnd: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 590     }
 591   }
 592 #endif // INCLUDE_PARALLELGC
 593   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedEnd: enabled only for G1 and Parallel GC");
 594 WB_END
 595 
 596 #endif // INCLUDE_G1GC || INCLUDE_PARALLELGC
 597 
 598 #if INCLUDE_PARALLELGC
 599 
 600 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
 601   if (UseParallelGC) {
 602     return ParallelScavengeHeap::heap()->gens()->virtual_spaces()->alignment();
 603   }
 604   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
 605 WB_END
 606 
 607 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
 608   if (UseParallelGC) {
 609     return GenAlignment;
 610   }
 611   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
 612 WB_END
 613 
 614 #endif // INCLUDE_PARALLELGC
 615 
 616 #if INCLUDE_G1GC
 617 
 618 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 619   if (UseG1GC) {
 620     ResourceMark rm(THREAD);
 621     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 622     MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 623     Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 624     return JNIHandles::make_local(env, h());
 625   }
 626   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
 627 WB_END
 628 
 629 class OldRegionsLivenessClosure: public HeapRegionClosure {
 630 
 631  private:
 632   const int _liveness;
 633   size_t _total_count;
 634   size_t _total_memory;
 635   size_t _total_memory_to_free;
 636 
 637  public:
 638   OldRegionsLivenessClosure(int liveness) :
 639     _liveness(liveness),
 640     _total_count(0),
 641     _total_memory(0),
 642     _total_memory_to_free(0) { }
 643 
 644     size_t total_count() { return _total_count; }
 645     size_t total_memory() { return _total_memory; }
 646     size_t total_memory_to_free() { return _total_memory_to_free; }
 647 
 648   bool do_heap_region(HeapRegion* r) {
 649     if (r->is_old()) {
 650       size_t prev_live = r->marked_bytes();
 651       size_t live = r->live_bytes();
 652       size_t size = r->used();
 653       size_t reg_size = HeapRegion::GrainBytes;
 654       if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
 655         _total_memory += size;
 656         ++_total_count;
 657         if (size == reg_size) {
 658         // we don't include non-full regions since they are unlikely included in mixed gc
 659         // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
 660           _total_memory_to_free += size - prev_live;
 661         }
 662       }
 663     }
 664     return false;
 665   }
 666 };
 667 
 668 
 669 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
 670   if (!UseG1GC) {
 671     THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
 672   }
 673   if (liveness < 0) {
 674     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
 675   }
 676 
 677   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 678   OldRegionsLivenessClosure rli(liveness);
 679   g1h->heap_region_iterate(&rli);
 680 
 681   typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
 682   result->long_at_put(0, rli.total_count());
 683   result->long_at_put(1, rli.total_memory());
 684   result->long_at_put(2, rli.total_memory_to_free());
 685   return (jlongArray) JNIHandles::make_local(env, result);
 686 WB_END
 687 
 688 #endif // INCLUDE_G1GC
 689 
 690 #if INCLUDE_NMT
 691 // Alloc memory using the test memory type so that we can use that to see if
 692 // NMT picks it up correctly
 693 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 694   jlong addr = 0;
 695   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 696   return addr;
 697 WB_END
 698 
 699 // Alloc memory with pseudo call stack. The test can create psudo malloc
 700 // allocation site to stress the malloc tracking.
 701 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 702   address pc = (address)(size_t)pseudo_stack;
 703   NativeCallStack stack(&pc, 1);
 704   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 705 WB_END
 706 
 707 // Alloc memory with pseudo call stack and specific memory type.
 708 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint type))
 709   address pc = (address)(size_t)pseudo_stack;
 710   NativeCallStack stack(&pc, 1);
 711   return (jlong)(uintptr_t)os::malloc(size, (MEMFLAGS)type, stack);
 712 WB_END
 713 
 714 // Free the memory allocated by NMTAllocTest
 715 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 716   os::free((void*)(uintptr_t)mem);
 717 WB_END
 718 
 719 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 720   jlong addr = 0;
 721 
 722   addr = (jlong)(uintptr_t)os::reserve_memory(size);
 723   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 724 
 725   return addr;
 726 WB_END
 727 
 728 WB_ENTRY(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
 729   addr = (jlong)(uintptr_t)os::attempt_reserve_memory_at((size_t)size, (char*)(uintptr_t)addr);
 730   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 731 
 732   return addr;
 733 WB_END
 734 
 735 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 736   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 737   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 738 WB_END
 739 
 740 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 741   os::uncommit_memory((char *)(uintptr_t)addr, size);
 742 WB_END
 743 
 744 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 745   os::release_memory((char *)(uintptr_t)addr, size);
 746 WB_END
 747 
 748 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 749   // Test that we can downgrade NMT levels but not upgrade them.
 750   if (MemTracker::tracking_level() == NMT_off) {
 751     MemTracker::transition_to(NMT_off);
 752     return MemTracker::tracking_level() == NMT_off;
 753   } else {
 754     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 755     MemTracker::transition_to(NMT_summary);
 756     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 757 
 758     // Can't go to detail once NMT is set to summary.
 759     MemTracker::transition_to(NMT_detail);
 760     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 761 
 762     // Shutdown sets tracking level to minimal.
 763     MemTracker::shutdown();
 764     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 765 
 766     // Once the tracking level is minimal, we cannot increase to summary.
 767     // The code ignores this request instead of asserting because if the malloc site
 768     // table overflows in another thread, it tries to change the code to summary.
 769     MemTracker::transition_to(NMT_summary);
 770     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 771 
 772     // Really can never go up to detail, verify that the code would never do this.
 773     MemTracker::transition_to(NMT_detail);
 774     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 775     return MemTracker::tracking_level() == NMT_minimal;
 776   }
 777 WB_END
 778 
 779 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 780   int hash_size = MallocSiteTable::hash_buckets();
 781   assert(hash_size > 0, "NMT hash_size should be > 0");
 782   return (jint)hash_size;
 783 WB_END
 784 #endif // INCLUDE_NMT
 785 
 786 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 787   assert(method != NULL, "method should not be null");
 788   ThreadToNativeFromVM ttn(thread);
 789   return env->FromReflectedMethod(method);
 790 }
 791 
 792 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 793 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 794  private:
 795   int _result;
 796   const bool _make_not_entrant;
 797  public:
 798   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 799         _result(0), _make_not_entrant(make_not_entrant) { }
 800   int  result() const { return _result; }
 801 
 802   void doit() {
 803     for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
 804       if (t->has_last_Java_frame()) {
 805         for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
 806           frame* f = fst.current();
 807           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 808             RegisterMap* reg_map = fst.register_map();
 809             Deoptimization::deoptimize(t, *f, reg_map);
 810             if (_make_not_entrant) {
 811                 CompiledMethod* cm = CodeCache::find_compiled(f->pc());
 812                 assert(cm != NULL, "sanity check");
 813                 cm->make_not_entrant();
 814             }
 815             ++_result;
 816           }
 817         }
 818       }
 819     }
 820   }
 821 };
 822 
 823 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 824   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 825   VMThread::execute(&op);
 826   return op.result();
 827 WB_END
 828 
 829 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 830   CodeCache::mark_all_nmethods_for_deoptimization();
 831   Deoptimization::deoptimize_all_marked();
 832 WB_END
 833 
 834 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 835   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 836   int result = 0;
 837   CHECK_JNI_EXCEPTION_(env, result);
 838   MutexLocker mu(Compile_lock);
 839   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 840   if (is_osr) {
 841     result += mh->mark_osr_nmethods();
 842   } else if (mh->code() != NULL) {
 843     mh->code()->mark_for_deoptimization();
 844     ++result;
 845   }
 846   result += CodeCache::mark_for_deoptimization(mh());
 847   if (result > 0) {
 848     Deoptimization::deoptimize_all_marked();
 849   }
 850   return result;
 851 WB_END
 852 
 853 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 854   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 855   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 856   MutexLocker mu(Compile_lock);
 857   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 858   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 859   if (code == NULL) {
 860     return JNI_FALSE;
 861   }
 862   return (code->is_alive() && !code->is_marked_for_deoptimization());
 863 WB_END
 864 
 865 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 866   if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 867     return false;
 868   }
 869   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 870   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 871   MutexLocker mu(Compile_lock);
 872   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 873   if (is_osr) {
 874     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 875   } else {
 876     return CompilationPolicy::can_be_compiled(mh, comp_level);
 877   }
 878 WB_END
 879 
 880 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 881   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 882   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 883   MutexLocker mu(Compile_lock);
 884   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 885   return mh->queued_for_compilation();
 886 WB_END
 887 
 888 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 889   if (compLevel < CompLevel_none || compLevel > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 890     return false; // Intrinsic is not available on a non-existent compilation level.
 891   }
 892   jmethodID method_id, compilation_context_id;
 893   method_id = reflected_method_to_jmid(thread, env, method);
 894   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 895   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 896 
 897   DirectiveSet* directive;
 898   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 899   assert(comp != NULL, "compiler not available");
 900   if (compilation_context != NULL) {
 901     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 902     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 903     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 904     directive = DirectivesStack::getMatchingDirective(cch, comp);
 905   } else {
 906     // Calling with NULL matches default directive
 907     directive = DirectivesStack::getDefaultDirective(comp);
 908   }
 909   bool result = comp->is_intrinsic_available(mh, directive);
 910   DirectivesStack::release(directive);
 911   return result;
 912 WB_END
 913 
 914 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 915   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 916   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 917   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 918   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 919   return (code != NULL ? code->comp_level() : CompLevel_none);
 920 WB_END
 921 
 922 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 923   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 924   CHECK_JNI_EXCEPTION(env);
 925   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 926   if (is_osr) {
 927     mh->set_not_osr_compilable("WhiteBox", comp_level);
 928   } else {
 929     mh->set_not_compilable("WhiteBox", comp_level);
 930   }
 931 WB_END
 932 
 933 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 934   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 935   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 936   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 937   CompiledMethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 938   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 939 WB_END
 940 
 941 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 942   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 943   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 944   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 945   bool result = mh->dont_inline();
 946   mh->set_dont_inline(value == JNI_TRUE);
 947   return result;
 948 WB_END
 949 
 950 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 951   if (comp_level == CompLevel_any) {
 952     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 953         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 954   } else {
 955     return CompileBroker::queue_size(comp_level);
 956   }
 957 WB_END
 958 
 959 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 960   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 961   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 962   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 963   bool result = mh->force_inline();
 964   mh->set_force_inline(value == JNI_TRUE);
 965   return result;
 966 WB_END
 967 
 968 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
 969   // Screen for unavailable/bad comp level or null method
 970   AbstractCompiler* comp = CompileBroker::compiler(comp_level);
 971   if (method == NULL) {
 972     tty->print_cr("WB error: request to compile NULL method");
 973     return false;
 974   }
 975   if (comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 976     tty->print_cr("WB error: invalid compilation level %d", comp_level);
 977     return false;
 978   }
 979   if (comp == NULL) {
 980     tty->print_cr("WB error: no compiler for requested compilation level %d", comp_level);
 981     return false;
 982   }
 983 
 984   // Check if compilation is blocking
 985   methodHandle mh(THREAD, method);
 986   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
 987   bool is_blocking = !directive->BackgroundCompilationOption;
 988   DirectivesStack::release(directive);
 989 
 990   // Compile method and check result
 991   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, THREAD);
 992   MutexLocker mu(Compile_lock);
 993   bool is_queued = mh->queued_for_compilation();
 994   if ((!is_blocking && is_queued) || nm != NULL) {
 995     return true;
 996   }
 997   tty->print("WB error: failed to %s compile at level %d method ", is_blocking ? "blocking" : "", comp_level);
 998   mh->print_short_name(tty);
 999   tty->cr();
1000   if (is_blocking && is_queued) {
1001     tty->print_cr("WB error: blocking compilation is still in queue!");
1002   }
1003   return false;
1004 }
1005 
1006 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1007   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1008   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1009   return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1010 WB_END
1011 
1012 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1013   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1014   Method* clinit = ik->class_initializer();
1015   if (clinit == NULL) {
1016     return false;
1017   }
1018   return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1019 WB_END
1020 
1021 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1022   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1023   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1024 
1025   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1026   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
1027   bool result = directive->PrintAssemblyOption;
1028   DirectivesStack::release(directive);
1029 
1030   return result;
1031 WB_END
1032 
1033 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1034   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1035   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1036 
1037   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1038 
1039   ResourceMark rm;
1040   const char* error_msg = NULL;
1041   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1042   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1043 
1044   if (m == NULL) {
1045     assert(error_msg != NULL, "Always have an error message");
1046     tty->print_cr("Got error: %s", error_msg);
1047     return -1; // Pattern failed
1048   }
1049 
1050   // Pattern works - now check if it matches
1051   int result;
1052   if (m->match(mh, InlineMatcher::force_inline)) {
1053     result = 2; // Force inline match
1054   } else if (m->match(mh, InlineMatcher::dont_inline)) {
1055     result = 1; // Dont inline match
1056   } else {
1057     result = 0; // No match
1058   }
1059   delete m;
1060   return result;
1061 WB_END
1062 
1063 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1064   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1065   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1066 
1067   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1068 
1069   ResourceMark rm;
1070   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1071 
1072   const char* error_msg = NULL;
1073 
1074   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
1075   if (m == NULL) {
1076     assert(error_msg != NULL, "Must have error_msg");
1077     tty->print_cr("Got error: %s", error_msg);
1078     return -1;
1079   }
1080 
1081   // Pattern works - now check if it matches
1082   int result = m->matches(mh);
1083   delete m;
1084   assert(result == 0 || result == 1, "Result out of range");
1085   return result;
1086 WB_END
1087 
1088 WB_ENTRY(void, WB_MarkMethodProfiled(JNIEnv* env, jobject o, jobject method))
1089   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1090   CHECK_JNI_EXCEPTION(env);
1091   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1092 
1093   MethodData* mdo = mh->method_data();
1094   if (mdo == NULL) {
1095     Method::build_interpreter_method_data(mh, CHECK_AND_CLEAR);
1096     mdo = mh->method_data();
1097   }
1098   mdo->init();
1099   InvocationCounter* icnt = mdo->invocation_counter();
1100   InvocationCounter* bcnt = mdo->backedge_counter();
1101   // set i-counter according to TieredThresholdPolicy::is_method_profiled
1102   icnt->set(InvocationCounter::wait_for_compile, Tier4MinInvocationThreshold);
1103   bcnt->set(InvocationCounter::wait_for_compile, Tier4CompileThreshold);
1104 WB_END
1105 
1106 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1107   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1108   CHECK_JNI_EXCEPTION(env);
1109   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1110   MutexLocker mu(Compile_lock);
1111   MethodData* mdo = mh->method_data();
1112   MethodCounters* mcs = mh->method_counters();
1113 
1114   if (mdo != NULL) {
1115     mdo->init();
1116     ResourceMark rm;
1117     int arg_count = mdo->method()->size_of_parameters();
1118     for (int i = 0; i < arg_count; i++) {
1119       mdo->set_arg_modified(i, 0);
1120     }
1121     MutexLocker mu(mdo->extra_data_lock());
1122     mdo->clean_method_data(/*always_clean*/true);
1123   }
1124 
1125   mh->clear_not_c1_compilable();
1126   mh->clear_not_c2_compilable();
1127   mh->clear_not_c2_osr_compilable();
1128   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1129   if (mcs != NULL) {
1130     mcs->backedge_counter()->init();
1131     mcs->invocation_counter()->init();
1132     mcs->set_interpreter_invocation_count(0);
1133     mcs->set_interpreter_throwout_count(0);
1134 
1135 #ifdef TIERED
1136     mcs->set_rate(0.0F);
1137     mh->set_prev_event_count(0);
1138     mh->set_prev_time(0);
1139 #endif
1140   }
1141 WB_END
1142 
1143 template <typename T>
1144 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, JVMFlag::Error (*TAt)(const JVMFlag*, T*)) {
1145   if (name == NULL) {
1146     return false;
1147   }
1148   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1149   const char* flag_name = env->GetStringUTFChars(name, NULL);
1150   CHECK_JNI_EXCEPTION_(env, false);
1151   const JVMFlag* flag = JVMFlag::find_declared_flag(flag_name);
1152   JVMFlag::Error result = (*TAt)(flag, value);
1153   env->ReleaseStringUTFChars(name, flag_name);
1154   return (result == JVMFlag::SUCCESS);
1155 }
1156 
1157 template <typename T>
1158 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, JVMFlag::Error (*TAtPut)(JVMFlag* flag, T*, JVMFlag::Flags)) {
1159   if (name == NULL) {
1160     return false;
1161   }
1162   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1163   const char* flag_name = env->GetStringUTFChars(name, NULL);
1164   CHECK_JNI_EXCEPTION_(env, false);
1165   JVMFlag* flag = JVMFlag::find_flag(flag_name);
1166   JVMFlag::Error result = (*TAtPut)(flag, value, JVMFlag::INTERNAL);
1167   env->ReleaseStringUTFChars(name, flag_name);
1168   return (result == JVMFlag::SUCCESS);
1169 }
1170 
1171 template <typename T>
1172 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1173   ResourceMark rm(thread);
1174   jclass clazz = env->FindClass(name->as_C_string());
1175   CHECK_JNI_EXCEPTION_(env, NULL);
1176   jmethodID methodID = env->GetStaticMethodID(clazz,
1177         vmSymbols::valueOf_name()->as_C_string(),
1178         sig->as_C_string());
1179   CHECK_JNI_EXCEPTION_(env, NULL);
1180   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1181   CHECK_JNI_EXCEPTION_(env, NULL);
1182   return result;
1183 }
1184 
1185 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1186   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1187 }
1188 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1189   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1190 }
1191 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1192   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1193 }
1194 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1195   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1196 }*/
1197 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1198   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1199 }
1200 
1201 static const JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1202   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1203   const char* flag_name = env->GetStringUTFChars(name, NULL);
1204   CHECK_JNI_EXCEPTION_(env, NULL);
1205   const JVMFlag* result = JVMFlag::find_declared_flag(flag_name);
1206   env->ReleaseStringUTFChars(name, flag_name);
1207   return result;
1208 }
1209 
1210 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1211   const JVMFlag* flag = getVMFlag(thread, env, name);
1212   return (flag != NULL) && flag->is_constant_in_binary();
1213 WB_END
1214 
1215 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1216   const JVMFlag* flag = getVMFlag(thread, env, name);
1217   return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
1218 WB_END
1219 
1220 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1221   bool result;
1222   if (GetVMFlag <bool> (thread, env, name, &result, &JVMFlag::boolAt)) {
1223     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1224     return booleanBox(thread, env, result);
1225   }
1226   return NULL;
1227 WB_END
1228 
1229 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1230   int result;
1231   if (GetVMFlag <int> (thread, env, name, &result, &JVMFlag::intAt)) {
1232     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1233     return longBox(thread, env, result);
1234   }
1235   return NULL;
1236 WB_END
1237 
1238 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1239   uint result;
1240   if (GetVMFlag <uint> (thread, env, name, &result, &JVMFlag::uintAt)) {
1241     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1242     return longBox(thread, env, result);
1243   }
1244   return NULL;
1245 WB_END
1246 
1247 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1248   intx result;
1249   if (GetVMFlag <intx> (thread, env, name, &result, &JVMFlag::intxAt)) {
1250     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1251     return longBox(thread, env, result);
1252   }
1253   return NULL;
1254 WB_END
1255 
1256 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1257   uintx result;
1258   if (GetVMFlag <uintx> (thread, env, name, &result, &JVMFlag::uintxAt)) {
1259     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1260     return longBox(thread, env, result);
1261   }
1262   return NULL;
1263 WB_END
1264 
1265 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1266   uint64_t result;
1267   if (GetVMFlag <uint64_t> (thread, env, name, &result, &JVMFlag::uint64_tAt)) {
1268     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1269     return longBox(thread, env, result);
1270   }
1271   return NULL;
1272 WB_END
1273 
1274 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1275   size_t result;
1276   if (GetVMFlag <size_t> (thread, env, name, &result, &JVMFlag::size_tAt)) {
1277     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1278     return longBox(thread, env, result);
1279   }
1280   return NULL;
1281 WB_END
1282 
1283 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1284   double result;
1285   if (GetVMFlag <double> (thread, env, name, &result, &JVMFlag::doubleAt)) {
1286     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1287     return doubleBox(thread, env, result);
1288   }
1289   return NULL;
1290 WB_END
1291 
1292 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1293   ccstr ccstrResult;
1294   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &JVMFlag::ccstrAt)) {
1295     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1296     jstring result = env->NewStringUTF(ccstrResult);
1297     CHECK_JNI_EXCEPTION_(env, NULL);
1298     return result;
1299   }
1300   return NULL;
1301 WB_END
1302 
1303 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1304   bool result = value == JNI_TRUE ? true : false;
1305   SetVMFlag <bool> (thread, env, name, &result, &JVMFlag::boolAtPut);
1306 WB_END
1307 
1308 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1309   int result = value;
1310   SetVMFlag <int> (thread, env, name, &result, &JVMFlag::intAtPut);
1311 WB_END
1312 
1313 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1314   uint result = value;
1315   SetVMFlag <uint> (thread, env, name, &result, &JVMFlag::uintAtPut);
1316 WB_END
1317 
1318 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1319   intx result = value;
1320   SetVMFlag <intx> (thread, env, name, &result, &JVMFlag::intxAtPut);
1321 WB_END
1322 
1323 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1324   uintx result = value;
1325   SetVMFlag <uintx> (thread, env, name, &result, &JVMFlag::uintxAtPut);
1326 WB_END
1327 
1328 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1329   uint64_t result = value;
1330   SetVMFlag <uint64_t> (thread, env, name, &result, &JVMFlag::uint64_tAtPut);
1331 WB_END
1332 
1333 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1334   size_t result = value;
1335   SetVMFlag <size_t> (thread, env, name, &result, &JVMFlag::size_tAtPut);
1336 WB_END
1337 
1338 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1339   double result = value;
1340   SetVMFlag <double> (thread, env, name, &result, &JVMFlag::doubleAtPut);
1341 WB_END
1342 
1343 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1344   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1345   const char* ccstrValue;
1346   if (value == NULL) {
1347     ccstrValue = NULL;
1348   }
1349   else {
1350     ccstrValue = env->GetStringUTFChars(value, NULL);
1351     CHECK_JNI_EXCEPTION(env);
1352   }
1353   ccstr ccstrResult = ccstrValue;
1354   bool needFree;
1355   {
1356     ThreadInVMfromNative ttvfn(thread); // back to VM
1357     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &JVMFlag::ccstrAtPut);
1358   }
1359   if (value != NULL) {
1360     env->ReleaseStringUTFChars(value, ccstrValue);
1361   }
1362   if (needFree) {
1363     FREE_C_HEAP_ARRAY(char, ccstrResult);
1364   }
1365 WB_END
1366 
1367 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1368   WhiteBox::compilation_locked = true;
1369 WB_END
1370 
1371 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1372   MonitorLocker mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1373   WhiteBox::compilation_locked = false;
1374   mo.notify_all();
1375 WB_END
1376 
1377 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
1378   // Force a code cache sweep and block until it finished
1379   NMethodSweeper::force_sweep();
1380 WB_END
1381 
1382 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1383   ResourceMark rm(THREAD);
1384   int len;
1385   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1386   return (StringTable::lookup(name, len) != NULL);
1387 WB_END
1388 
1389 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1390   if (AsyncDeflateIdleMonitors) {
1391     // AsyncDeflateIdleMonitors needs to know when System.gc() or
1392     // the equivalent is called so any special clean up can be done
1393     // at a safepoint, e.g., TestHumongousClassLoader.java.
1394     ObjectSynchronizer::set_is_special_deflation_requested(true);
1395   }
1396   Universe::heap()->soft_ref_policy()->set_should_clear_all_soft_refs(true);
1397   Universe::heap()->collect(GCCause::_wb_full_gc);
1398 #if INCLUDE_G1GC
1399   if (UseG1GC) {
1400     // Needs to be cleared explicitly for G1
1401     Universe::heap()->soft_ref_policy()->set_should_clear_all_soft_refs(false);
1402   }
1403 #endif // INCLUDE_G1GC
1404 WB_END
1405 
1406 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1407   Universe::heap()->collect(GCCause::_wb_young_gc);
1408 WB_END
1409 
1410 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1411   // static+volatile in order to force the read to happen
1412   // (not be eliminated by the compiler)
1413   static char c;
1414   static volatile char* p;
1415 
1416   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1417   if (p == NULL) {
1418     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1419   }
1420 
1421   c = *p;
1422 WB_END
1423 
1424 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1425   const char* features = VM_Version::features_string();
1426   ThreadToNativeFromVM ttn(thread);
1427   jstring features_string = env->NewStringUTF(features);
1428 
1429   CHECK_JNI_EXCEPTION_(env, NULL);
1430 
1431   return features_string;
1432 WB_END
1433 
1434 int WhiteBox::get_blob_type(const CodeBlob* code) {
1435   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1436   if (code->is_aot()) {
1437     return -1;
1438   }
1439   return CodeCache::get_code_heap(code)->code_blob_type();
1440 }
1441 
1442 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1443   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1444   return CodeCache::get_code_heap(blob_type);
1445 }
1446 
1447 struct CodeBlobStub {
1448   CodeBlobStub(const CodeBlob* blob) :
1449       name(os::strdup(blob->name())),
1450       size(blob->size()),
1451       blob_type(WhiteBox::get_blob_type(blob)),
1452       address((jlong) blob) { }
1453   ~CodeBlobStub() { os::free((void*) name); }
1454   const char* const name;
1455   const jint        size;
1456   const jint        blob_type;
1457   const jlong       address;
1458 };
1459 
1460 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1461   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1462   CHECK_JNI_EXCEPTION_(env, NULL);
1463   jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1464 
1465   jstring name = env->NewStringUTF(cb->name);
1466   CHECK_JNI_EXCEPTION_(env, NULL);
1467   env->SetObjectArrayElement(result, 0, name);
1468 
1469   jobject obj = integerBox(thread, env, cb->size);
1470   CHECK_JNI_EXCEPTION_(env, NULL);
1471   env->SetObjectArrayElement(result, 1, obj);
1472 
1473   obj = integerBox(thread, env, cb->blob_type);
1474   CHECK_JNI_EXCEPTION_(env, NULL);
1475   env->SetObjectArrayElement(result, 2, obj);
1476 
1477   obj = longBox(thread, env, cb->address);
1478   CHECK_JNI_EXCEPTION_(env, NULL);
1479   env->SetObjectArrayElement(result, 3, obj);
1480 
1481   return result;
1482 }
1483 
1484 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1485   ResourceMark rm(THREAD);
1486   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1487   CHECK_JNI_EXCEPTION_(env, NULL);
1488   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1489   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1490   jobjectArray result = NULL;
1491   if (code == NULL) {
1492     return result;
1493   }
1494   int comp_level = code->comp_level();
1495   int insts_size = comp_level == CompLevel_aot ? code->code_end() - code->code_begin() : code->insts_size();
1496 
1497   ThreadToNativeFromVM ttn(thread);
1498   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1499   CHECK_JNI_EXCEPTION_(env, NULL);
1500   result = env->NewObjectArray(5, clazz, NULL);
1501   if (result == NULL) {
1502     return result;
1503   }
1504 
1505   CodeBlobStub stub(code);
1506   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1507   CHECK_JNI_EXCEPTION_(env, NULL);
1508   env->SetObjectArrayElement(result, 0, codeBlob);
1509 
1510   jobject level = integerBox(thread, env, comp_level);
1511   CHECK_JNI_EXCEPTION_(env, NULL);
1512   env->SetObjectArrayElement(result, 1, level);
1513 
1514   jbyteArray insts = env->NewByteArray(insts_size);
1515   CHECK_JNI_EXCEPTION_(env, NULL);
1516   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1517   env->SetObjectArrayElement(result, 2, insts);
1518 
1519   jobject id = integerBox(thread, env, code->compile_id());
1520   CHECK_JNI_EXCEPTION_(env, NULL);
1521   env->SetObjectArrayElement(result, 3, id);
1522 
1523   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1524   CHECK_JNI_EXCEPTION_(env, NULL);
1525   env->SetObjectArrayElement(result, 4, entry_point);
1526 
1527   return result;
1528 WB_END
1529 
1530 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1531   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1532   BufferBlob* blob;
1533   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1534   if (full_size < size) {
1535     full_size += align_up(size - full_size, oopSize);
1536   }
1537   {
1538     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1539     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1540     if (blob != NULL) {
1541       ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1542     }
1543   }
1544   // Track memory usage statistic after releasing CodeCache_lock
1545   MemoryService::track_code_cache_memory_usage();
1546   return blob;
1547 }
1548 
1549 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1550   if (size < 0) {
1551     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1552       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1553   }
1554   return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1555 WB_END
1556 
1557 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1558   if (addr == 0) {
1559     return;
1560   }
1561   BufferBlob::free((BufferBlob*) addr);
1562 WB_END
1563 
1564 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1565   ResourceMark rm;
1566   GrowableArray<CodeBlobStub*> blobs;
1567   {
1568     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1569     CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1570     if (heap == NULL) {
1571       return NULL;
1572     }
1573     for (CodeBlob* cb = (CodeBlob*) heap->first();
1574          cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1575       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1576       new (stub) CodeBlobStub(cb);
1577       blobs.append(stub);
1578     }
1579   }
1580   ThreadToNativeFromVM ttn(thread);
1581   jobjectArray result = NULL;
1582   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1583   CHECK_JNI_EXCEPTION_(env, NULL);
1584   result = env->NewObjectArray(blobs.length(), clazz, NULL);
1585   CHECK_JNI_EXCEPTION_(env, NULL);
1586   if (result == NULL) {
1587     return result;
1588   }
1589   int i = 0;
1590   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1591        it != blobs.end(); ++it) {
1592     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1593     CHECK_JNI_EXCEPTION_(env, NULL);
1594     env->SetObjectArrayElement(result, i, obj);
1595     CHECK_JNI_EXCEPTION_(env, NULL);
1596     ++i;
1597   }
1598   return result;
1599 WB_END
1600 
1601 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1602   return CompileBroker::get_compilation_activity_mode();
1603 WB_END
1604 
1605 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1606   if (addr == 0) {
1607     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1608       "WB_GetCodeBlob: addr is null");
1609   }
1610   ThreadToNativeFromVM ttn(thread);
1611   CodeBlobStub stub((CodeBlob*) addr);
1612   return codeBlob2objectArray(thread, env, &stub);
1613 WB_END
1614 
1615 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1616   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1617   CHECK_JNI_EXCEPTION_(env, 0);
1618   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1619   return (jlong) mh->method_data();
1620 WB_END
1621 
1622 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1623   return (jlong) Thread::current()->stack_size();
1624 WB_END
1625 
1626 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1627   JavaThread* t = JavaThread::current();
1628   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1629 WB_END
1630 
1631 
1632 int WhiteBox::array_bytes_to_length(size_t bytes) {
1633   return Array<u1>::bytes_to_length(bytes);
1634 }
1635 
1636 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1637   if (size < 0) {
1638     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1639         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1640   }
1641 
1642   oop class_loader_oop = JNIHandles::resolve(class_loader);
1643   ClassLoaderData* cld = class_loader_oop != NULL
1644       ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1645       : ClassLoaderData::the_null_class_loader_data();
1646 
1647   void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1648 
1649   return (jlong)(uintptr_t)metadata;
1650 WB_END
1651 
1652 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1653   oop class_loader_oop = JNIHandles::resolve(class_loader);
1654   ClassLoaderData* cld = class_loader_oop != NULL
1655       ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1656       : ClassLoaderData::the_null_class_loader_data();
1657 
1658   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1659 WB_END
1660 
1661 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1662                                 jstring version, jstring location, jobjectArray packages))
1663   ResourceMark rm(THREAD);
1664 
1665   objArrayOop packages_oop = objArrayOop(JNIHandles::resolve(packages));
1666   objArrayHandle packages_h(THREAD, packages_oop);
1667   int num_packages = (packages_h == NULL ? 0 : packages_h->length());
1668 
1669   char** pkgs = NULL;
1670   if (num_packages > 0) {
1671     pkgs = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char*, num_packages);
1672     for (int x = 0; x < num_packages; x++) {
1673       oop pkg_str = packages_h->obj_at(x);
1674       if (pkg_str == NULL || !pkg_str->is_a(SystemDictionary::String_klass())) {
1675         THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1676                   err_msg("Bad package name"));
1677       }
1678       pkgs[x] = java_lang_String::as_utf8_string(pkg_str);
1679     }
1680   }
1681   Modules::define_module(module, is_open, version, location, (const char* const*)pkgs, num_packages, CHECK);
1682 WB_END
1683 
1684 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1685   ResourceMark rm(THREAD);
1686   char* package_name = NULL;
1687   if (package != NULL) {
1688       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1689   }
1690   Modules::add_module_exports_qualified(from_module, package_name, to_module, CHECK);
1691 WB_END
1692 
1693 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1694   ResourceMark rm(THREAD);
1695   char* package_name = NULL;
1696   if (package != NULL) {
1697       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1698   }
1699   Modules::add_module_exports_to_all_unnamed(module, package_name, CHECK);
1700 WB_END
1701 
1702 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1703   ResourceMark rm(THREAD);
1704   char* package_name = NULL;
1705   if (package != NULL) {
1706       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1707   }
1708   Modules::add_module_exports(module, package_name, NULL, CHECK);
1709 WB_END
1710 
1711 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1712   Modules::add_reads_module(from_module, source_module, CHECK);
1713 WB_END
1714 
1715 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1716   if (inc < 0) {
1717     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1718         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1719   }
1720 
1721   jlong max_size_t = (jlong) ((size_t) -1);
1722   if (inc > max_size_t) {
1723     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1724         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1725   }
1726 
1727   size_t new_cap_until_GC = 0;
1728   size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1729   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1730   if (!success) {
1731     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1732                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1733                 "due to contention with another thread");
1734   }
1735   return (jlong) new_cap_until_GC;
1736 WB_END
1737 
1738 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1739   return (jlong) MetaspaceGC::capacity_until_GC();
1740 WB_END
1741 
1742 WB_ENTRY(jboolean, WB_MetaspaceShouldConcurrentCollect(JNIEnv* env, jobject wb))
1743   return MetaspaceGC::should_concurrent_collect();
1744 WB_END
1745 
1746 WB_ENTRY(jlong, WB_MetaspaceReserveAlignment(JNIEnv* env, jobject wb))
1747   return (jlong)Metaspace::reserve_alignment();
1748 WB_END
1749 
1750 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1751   Mutex::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1752                                            Mutex::_safepoint_check_always :
1753                                            Mutex::_safepoint_check_never;
1754   Mutex::SafepointCheckFlag sfpt_check_attempted = attemptedNoSafepointValue ?
1755                                            Mutex::_no_safepoint_check_flag :
1756                                            Mutex::_safepoint_check_flag;
1757   MutexLocker ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1758                  sfpt_check_attempted);
1759 WB_END
1760 
1761 WB_ENTRY(void, WB_AssertSpecialLock(JNIEnv* env, jobject o, jboolean allowVMBlock, jboolean safepointCheck))
1762   // Create a special lock violating condition in value
1763   Mutex::SafepointCheckRequired sfpt_check_required = safepointCheck ?
1764                                            Mutex::_safepoint_check_always :
1765                                            Mutex::_safepoint_check_never;
1766   Mutex::SafepointCheckFlag safepoint_check = safepointCheck ?
1767                                            Monitor::_safepoint_check_flag :
1768                                            Monitor::_no_safepoint_check_flag;
1769 
1770   MutexLocker ml(new Mutex(Mutex::special, "SpecialTest_lock", allowVMBlock, sfpt_check_required), safepoint_check);
1771   // If the lock above succeeds, try to safepoint to test the NSV implied with this special lock.
1772   ThreadBlockInVM tbivm(JavaThread::current());
1773 WB_END
1774 
1775 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1776   oop obj_oop = JNIHandles::resolve(obj);
1777   return (jboolean) obj_oop->mark().has_monitor();
1778 WB_END
1779 
1780 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1781   VM_ForceSafepoint force_safepoint_op;
1782   VMThread::execute(&force_safepoint_op);
1783 WB_END
1784 
1785 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1786   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1787   return (jlong) ik->constants();
1788 WB_END
1789 
1790 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1791   return ConstantPool::CPCACHE_INDEX_TAG;
1792 WB_END
1793 
1794 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1795   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1796   ConstantPool* cp = ik->constants();
1797   if (cp->cache() == NULL) {
1798       return -1;
1799   }
1800   return cp->cache()->length();
1801 WB_END
1802 
1803 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1804   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1805   ConstantPool* cp = ik->constants();
1806   if (cp->cache() == NULL) {
1807     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1808   }
1809   jint cpci = index;
1810   jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1811   if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1812     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1813   }
1814   jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1815   return cpi;
1816 WB_END
1817 
1818 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1819   return ConstantPool::encode_invokedynamic_index(index);
1820 WB_END
1821 
1822 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1823   VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1824   VMThread::execute(&clear_ics);
1825 WB_END
1826 
1827 template <typename T>
1828 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1829   assert(value != NULL, "sanity");
1830   if (method == NULL || name == NULL) {
1831     return false;
1832   }
1833   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1834   CHECK_JNI_EXCEPTION_(env, false);
1835   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1836   // can't be in VM when we call JNI
1837   ThreadToNativeFromVM ttnfv(thread);
1838   const char* flag_name = env->GetStringUTFChars(name, NULL);
1839   CHECK_JNI_EXCEPTION_(env, false);
1840   bool result =  CompilerOracle::has_option_value(mh, flag_name, *value);
1841   env->ReleaseStringUTFChars(name, flag_name);
1842   return result;
1843 }
1844 
1845 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1846   bool result;
1847   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1848     // can't be in VM when we call JNI
1849     ThreadToNativeFromVM ttnfv(thread);
1850     return booleanBox(thread, env, result);
1851   }
1852   return NULL;
1853 WB_END
1854 
1855 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1856   intx result;
1857   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1858     // can't be in VM when we call JNI
1859     ThreadToNativeFromVM ttnfv(thread);
1860     return longBox(thread, env, result);
1861   }
1862   return NULL;
1863 WB_END
1864 
1865 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1866   uintx result;
1867   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1868     // can't be in VM when we call JNI
1869     ThreadToNativeFromVM ttnfv(thread);
1870     return longBox(thread, env, result);
1871   }
1872   return NULL;
1873 WB_END
1874 
1875 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1876   double result;
1877   if (GetMethodOption <double> (thread, env, method, name, &result)) {
1878     // can't be in VM when we call JNI
1879     ThreadToNativeFromVM ttnfv(thread);
1880     return doubleBox(thread, env, result);
1881   }
1882   return NULL;
1883 WB_END
1884 
1885 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1886   ccstr ccstrResult;
1887   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1888     // can't be in VM when we call JNI
1889     ThreadToNativeFromVM ttnfv(thread);
1890     jstring result = env->NewStringUTF(ccstrResult);
1891     CHECK_JNI_EXCEPTION_(env, NULL);
1892     return result;
1893   }
1894   return NULL;
1895 WB_END
1896 
1897 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
1898   const char* p = Arguments::get_default_shared_archive_path();
1899   ThreadToNativeFromVM ttn(thread);
1900   jstring path_string = env->NewStringUTF(p);
1901 
1902   CHECK_JNI_EXCEPTION_(env, NULL);
1903 
1904   return path_string;
1905 WB_END
1906 
1907 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
1908   return UseSharedSpaces;
1909 WB_END
1910 
1911 WB_ENTRY(jboolean, WB_CDSMemoryMappingFailed(JNIEnv* env, jobject wb))
1912   return FileMapInfo::memory_mapping_failed();
1913 WB_END
1914 
1915 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1916   oop obj_oop = JNIHandles::resolve(obj);
1917   return HeapShared::is_archived_object(obj_oop);
1918 WB_END
1919 
1920 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1921   return (jboolean)MetaspaceShared::is_in_shared_metaspace(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1922 WB_END
1923 
1924 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1925   return !HeapShared::closed_archive_heap_region_mapped();
1926 WB_END
1927 
1928 WB_ENTRY(jobject, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass clazz))
1929   Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1930   if (k->is_instance_klass()) {
1931     InstanceKlass *ik = InstanceKlass::cast(k);
1932     ConstantPool *cp = ik->constants();
1933     objArrayOop refs =  cp->resolved_references();
1934     return (jobject)JNIHandles::make_local(env, refs);
1935   } else {
1936     return NULL;
1937   }
1938 WB_END
1939 
1940 WB_ENTRY(void, WB_LinkClass(JNIEnv* env, jobject wb, jclass clazz))
1941   Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1942   if (!k->is_instance_klass()) {
1943     return;
1944   }
1945   InstanceKlass *ik = InstanceKlass::cast(k);
1946   ik->link_class(THREAD); // may throw verification error
1947 WB_END
1948 
1949 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
1950   return HeapShared::open_archive_heap_region_mapped();
1951 WB_END
1952 
1953 WB_ENTRY(jboolean, WB_IsCDSIncludedInVmBuild(JNIEnv* env))
1954 #if INCLUDE_CDS
1955 # ifdef _LP64
1956     if (!UseCompressedOops || !UseCompressedClassPointers) {
1957       // On 64-bit VMs, CDS is supported only with compressed oops/pointers
1958       return false;
1959     }
1960 # endif // _LP64
1961   return true;
1962 #else
1963   return false;
1964 #endif // INCLUDE_CDS
1965 WB_END
1966 
1967 WB_ENTRY(jboolean, WB_IsJavaHeapArchiveSupported(JNIEnv* env))
1968   return HeapShared::is_heap_object_archiving_allowed();
1969 WB_END
1970 
1971 
1972 WB_ENTRY(jboolean, WB_IsJFRIncludedInVmBuild(JNIEnv* env))
1973 #if INCLUDE_JFR
1974   return true;
1975 #else
1976   return false;
1977 #endif // INCLUDE_JFR
1978 WB_END
1979 
1980 #if INCLUDE_CDS
1981 
1982 WB_ENTRY(jint, WB_GetOffsetForName(JNIEnv* env, jobject o, jstring name))
1983   ResourceMark rm;
1984   char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
1985   int result = CDSOffsets::find_offset(c_name);
1986   return (jint)result;
1987 WB_END
1988 
1989 #endif // INCLUDE_CDS
1990 
1991 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
1992   class TraceSelfClosure : public ThreadClosure {
1993     jint _num_threads_completed;
1994 
1995     void do_thread(Thread* th) {
1996       assert(th->is_Java_thread(), "sanity");
1997       JavaThread* jt = (JavaThread*)th;
1998       ResourceMark rm;
1999 
2000       jt->print_on(tty);
2001       jt->print_stack_on(tty);
2002       tty->cr();
2003       Atomic::inc(&_num_threads_completed);
2004     }
2005 
2006   public:
2007     TraceSelfClosure() : _num_threads_completed(0) {}
2008 
2009     jint num_threads_completed() const { return _num_threads_completed; }
2010   };
2011   TraceSelfClosure tsc;
2012 
2013   if (all_threads) {
2014     Handshake::execute(&tsc);
2015   } else {
2016     oop thread_oop = JNIHandles::resolve(thread_handle);
2017     if (thread_oop != NULL) {
2018       JavaThread* target = java_lang_Thread::thread(thread_oop);
2019       Handshake::execute(&tsc, target);
2020     }
2021   }
2022   return tsc.num_threads_completed();
2023 WB_END
2024 
2025 //Some convenience methods to deal with objects from java
2026 int WhiteBox::offset_for_field(const char* field_name, oop object,
2027     Symbol* signature_symbol) {
2028   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
2029   Thread* THREAD = Thread::current();
2030 
2031   //Get the class of our object
2032   Klass* arg_klass = object->klass();
2033   //Turn it into an instance-klass
2034   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
2035 
2036   //Create symbols to look for in the class
2037   TempNewSymbol name_symbol = SymbolTable::new_symbol(field_name);
2038 
2039   //To be filled in with an offset of the field we're looking for
2040   fieldDescriptor fd;
2041 
2042   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2043   if (res == NULL) {
2044     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2045         name_symbol->as_C_string());
2046     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2047   }
2048 
2049   //fetch the field at the offset we've found
2050   int dest_offset = fd.offset();
2051 
2052   return dest_offset;
2053 }
2054 
2055 
2056 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2057   int offset = offset_for_field(field_name, object,
2058       vmSymbols::string_signature());
2059   oop string = object->obj_field(offset);
2060   if (string == NULL) {
2061     return NULL;
2062   }
2063   const char* ret = java_lang_String::as_utf8_string(string);
2064   return ret;
2065 }
2066 
2067 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2068   int offset =
2069       offset_for_field(field_name, object, vmSymbols::bool_signature());
2070   bool ret = (object->bool_field(offset) == JNI_TRUE);
2071   return ret;
2072 }
2073 
2074 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2075   ResourceMark rm;
2076   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2077 
2078   //  one by one registration natives for exception catching
2079   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2080   CHECK_JNI_EXCEPTION(env);
2081   for (int i = 0, n = method_count; i < n; ++i) {
2082     // Skip dummy entries
2083     if (method_array[i].fnPtr == NULL) continue;
2084     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2085       jthrowable throwable_obj = env->ExceptionOccurred();
2086       if (throwable_obj != NULL) {
2087         env->ExceptionClear();
2088         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2089           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2090           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2091           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
2092               method_array[i].name, method_array[i].signature);
2093         }
2094       } else {
2095         // Registration failed unexpectedly.
2096         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
2097             method_array[i].name, method_array[i].signature);
2098         env->UnregisterNatives(wbclass);
2099         break;
2100       }
2101     }
2102   }
2103 }
2104 
2105 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2106   // can't be in VM when we call JNI
2107   ThreadToNativeFromVM ttnfv(thread);
2108   const char* dir = env->GetStringUTFChars(compDirect, NULL);
2109   CHECK_JNI_EXCEPTION_(env, 0);
2110   int ret;
2111   {
2112     ThreadInVMfromNative ttvfn(thread); // back to VM
2113     ret = DirectivesParser::parse_string(dir, tty);
2114   }
2115   env->ReleaseStringUTFChars(compDirect, dir);
2116   // -1 for error parsing directive. Return 0 as number of directives added.
2117   if (ret == -1) {
2118     ret = 0;
2119   }
2120   return (jint) ret;
2121 WB_END
2122 
2123 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2124   DirectivesStack::pop(count);
2125 WB_END
2126 
2127 // Checks that the library libfile has the noexecstack bit set.
2128 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2129   jboolean ret = false;
2130 #ifdef LINUX
2131   // Can't be in VM when we call JNI.
2132   ThreadToNativeFromVM ttnfv(thread);
2133   const char* lf = env->GetStringUTFChars(libfile, NULL);
2134   CHECK_JNI_EXCEPTION_(env, 0);
2135   ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2136   env->ReleaseStringUTFChars(libfile, lf);
2137 #endif
2138   return ret;
2139 WB_END
2140 
2141 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2142   LINUX_ONLY(return OSContainer::is_containerized();)
2143   return false;
2144 WB_END
2145 
2146 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2147   os::print_os_info(tty);
2148 WB_END
2149 
2150 // Elf decoder
2151 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2152 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2153   ElfFile::_do_not_cache_elf_section = true;
2154 #endif
2155 WB_END
2156 
2157 WB_ENTRY(jlong, WB_ResolvedMethodItemsCount(JNIEnv* env, jobject o))
2158   return (jlong) ResolvedMethodTable::items_count();
2159 WB_END
2160 
2161 WB_ENTRY(jint, WB_ProtectionDomainRemovedCount(JNIEnv* env, jobject o))
2162   return (jint) SystemDictionary::pd_cache_table()->removed_entries_count();
2163 WB_END
2164 
2165 WB_ENTRY(jint, WB_AotLibrariesCount(JNIEnv* env, jobject o))
2166   jint result = 0;
2167 #if INCLUDE_AOT
2168   result = (jint) AOTLoader::heaps_count();
2169 #endif
2170   return result;
2171 WB_END
2172 
2173 #define CC (char*)
2174 
2175 static JNINativeMethod methods[] = {
2176   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
2177   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
2178   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
2179   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
2180   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
2181   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
2182   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
2183   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
2184   {CC"getHeapAlignment",                 CC"()J",                   (void*)&WB_GetHeapAlignment},
2185   {CC"isClassAlive0",                    CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
2186   {CC"getSymbolRefcount",                CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2187   {CC"parseCommandLine0",
2188       CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2189       (void*) &WB_ParseCommandLine
2190   },
2191   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2192                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
2193   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
2194                                                       (void*)&WB_AddToSystemClassLoaderSearch},
2195   {CC"getCompressedOopsMaxHeapSize", CC"()J",
2196       (void*)&WB_GetCompressedOopsMaxHeapSize},
2197   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
2198   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
2199   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
2200   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
2201 #if INCLUDE_CDS
2202   {CC"getOffsetForName0", CC"(Ljava/lang/String;)I",  (void*)&WB_GetOffsetForName},
2203 #endif
2204 #if INCLUDE_G1GC
2205   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
2206   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
2207   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
2208   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
2209   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
2210   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
2211   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
2212   {CC"g1StartConcMarkCycle",       CC"()Z",           (void*)&WB_G1StartMarkCycle  },
2213   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2214                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
2215   {CC"g1GetMixedGCInfo",   CC"(I)[J",                 (void*)&WB_G1GetMixedGCInfo },
2216 #endif // INCLUDE_G1GC
2217 #if INCLUDE_G1GC || INCLUDE_PARALLELGC
2218   {CC"dramReservedStart",   CC"()J",                  (void*)&WB_DramReservedStart },
2219   {CC"dramReservedEnd",     CC"()J",                  (void*)&WB_DramReservedEnd },
2220   {CC"nvdimmReservedStart", CC"()J",                  (void*)&WB_NvdimmReservedStart },
2221   {CC"nvdimmReservedEnd",   CC"()J",                  (void*)&WB_NvdimmReservedEnd },
2222 #endif // INCLUDE_G1GC || INCLUDE_PARALLELGC
2223 #if INCLUDE_PARALLELGC
2224   {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
2225   {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
2226 #endif
2227 #if INCLUDE_NMT
2228   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
2229   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
2230   {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J",   (void*)&WB_NMTMallocWithPseudoStackAndType},
2231   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
2232   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
2233   {CC"NMTAttemptReserveMemoryAt",    CC"(JJ)J",       (void*)&WB_NMTAttemptReserveMemoryAt },
2234   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
2235   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
2236   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
2237   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
2238   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
2239 #endif // INCLUDE_NMT
2240   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
2241   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
2242   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
2243                                                       (void*)&WB_DeoptimizeMethod  },
2244   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
2245                                                       (void*)&WB_IsMethodCompiled  },
2246   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
2247                                                       (void*)&WB_IsMethodCompilable},
2248   {CC"isMethodQueuedForCompilation0",
2249       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
2250   {CC"isIntrinsicAvailable0",
2251       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
2252                                                       (void*)&WB_IsIntrinsicAvailable},
2253   {CC"makeMethodNotCompilable0",
2254       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
2255   {CC"testSetDontInlineMethod0",
2256       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
2257   {CC"getMethodCompilationLevel0",
2258       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
2259   {CC"getMethodEntryBci0",
2260       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
2261   {CC"getCompileQueueSize",
2262       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
2263   {CC"testSetForceInlineMethod0",
2264       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
2265   {CC"enqueueMethodForCompilation0",
2266       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
2267   {CC"enqueueInitializerForCompilation0",
2268       CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
2269   {CC"markMethodProfiled",
2270       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_MarkMethodProfiled},
2271   {CC"clearMethodState0",
2272       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
2273   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
2274   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
2275   {CC"matchesMethod",
2276       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2277                                                       (void*)&WB_MatchesMethod},
2278   {CC"matchesInline",
2279       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2280                                                       (void*)&WB_MatchesInline},
2281   {CC"shouldPrintAssembly",
2282         CC"(Ljava/lang/reflect/Executable;I)Z",
2283                                                         (void*)&WB_ShouldPrintAssembly},
2284 
2285   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
2286   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
2287   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
2288   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
2289   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
2290   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
2291   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
2292   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
2293   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
2294   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
2295   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
2296                                                       (void*)&WB_SetStringVMFlag},
2297   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
2298                                                       (void*)&WB_GetBooleanVMFlag},
2299   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
2300                                                       (void*)&WB_GetIntVMFlag},
2301   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
2302                                                       (void*)&WB_GetUintVMFlag},
2303   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
2304                                                       (void*)&WB_GetIntxVMFlag},
2305   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
2306                                                       (void*)&WB_GetUintxVMFlag},
2307   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
2308                                                       (void*)&WB_GetUint64VMFlag},
2309   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
2310                                                       (void*)&WB_GetSizeTVMFlag},
2311   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
2312                                                       (void*)&WB_GetDoubleVMFlag},
2313   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
2314                                                       (void*)&WB_GetStringVMFlag},
2315   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
2316   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
2317   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
2318   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
2319   {CC"allocateMetaspace",
2320      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
2321   {CC"freeMetaspace",
2322      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
2323   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
2324   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
2325   {CC"metaspaceShouldConcurrentCollect", CC"()Z",     (void*)&WB_MetaspaceShouldConcurrentCollect },
2326   {CC"metaspaceReserveAlignment", CC"()J",            (void*)&WB_MetaspaceReserveAlignment },
2327   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
2328   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
2329                                                       (void*)&WB_GetNMethod         },
2330   {CC"forceNMethodSweep",  CC"()V",                   (void*)&WB_ForceNMethodSweep  },
2331   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
2332   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
2333   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
2334   {CC"getCompilationActivityMode",
2335                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
2336   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
2337                                                       (void*)&WB_GetMethodData      },
2338   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
2339   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
2340   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
2341   {CC"DefineModule",       CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
2342                                                       (void*)&WB_DefineModule },
2343   {CC"AddModuleExports",   CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
2344                                                       (void*)&WB_AddModuleExports },
2345   {CC"AddReadsModule",     CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
2346                                                       (void*)&WB_AddReadsModule },
2347   {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2348                                                       (void*)&WB_AddModuleExportsToAllUnnamed },
2349   {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2350                                                       (void*)&WB_AddModuleExportsToAll },
2351   {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
2352   {CC"assertSpecialLock",  CC"(ZZ)V",                 (void*)&WB_AssertSpecialLock },
2353   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
2354   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
2355   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
2356   {CC"getConstantPoolCacheIndexTag0", CC"()I",  (void*)&WB_GetConstantPoolCacheIndexTag},
2357   {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_GetConstantPoolCacheLength},
2358   {CC"remapInstructionOperandFromCPCache0",
2359       CC"(Ljava/lang/Class;I)I",                      (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
2360   {CC"encodeConstantPoolIndyIndex0",
2361       CC"(I)I",                      (void*)&WB_ConstantPoolEncodeIndyIndex},
2362   {CC"getMethodBooleanOption",
2363       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
2364                                                       (void*)&WB_GetMethodBooleaneOption},
2365   {CC"getMethodIntxOption",
2366       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2367                                                       (void*)&WB_GetMethodIntxOption},
2368   {CC"getMethodUintxOption",
2369       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2370                                                       (void*)&WB_GetMethodUintxOption},
2371   {CC"getMethodDoubleOption",
2372       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
2373                                                       (void*)&WB_GetMethodDoubleOption},
2374   {CC"getMethodStringOption",
2375       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
2376                                                       (void*)&WB_GetMethodStringOption},
2377   {CC"getDefaultArchivePath",             CC"()Ljava/lang/String;",
2378                                                       (void*)&WB_GetDefaultArchivePath},
2379   {CC"isSharingEnabled",   CC"()Z",                   (void*)&WB_IsSharingEnabled},
2380   {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
2381   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
2382   {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
2383   {CC"getResolvedReferences", CC"(Ljava/lang/Class;)Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
2384   {CC"linkClass",          CC"(Ljava/lang/Class;)V",  (void*)&WB_LinkClass},
2385   {CC"areOpenArchiveHeapObjectsMapped",   CC"()Z",    (void*)&WB_AreOpenArchiveHeapObjectsMapped},
2386   {CC"isCDSIncludedInVmBuild",            CC"()Z",    (void*)&WB_IsCDSIncludedInVmBuild },
2387   {CC"isJFRIncludedInVmBuild",            CC"()Z",    (void*)&WB_IsJFRIncludedInVmBuild },
2388   {CC"isJavaHeapArchiveSupported",        CC"()Z",    (void*)&WB_IsJavaHeapArchiveSupported },
2389   {CC"cdsMemoryMappingFailed",            CC"()Z",    (void*)&WB_CDSMemoryMappingFailed },
2390 
2391   {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
2392   {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
2393   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
2394                                                       (void*)&WB_AddCompilerDirective },
2395   {CC"removeCompilerDirective",   CC"(I)V",           (void*)&WB_RemoveCompilerDirective },
2396   {CC"isGCSupported",             CC"(I)Z",           (void*)&WB_IsGCSupported},
2397   {CC"isGCSelected",              CC"(I)Z",           (void*)&WB_IsGCSelected},
2398   {CC"isGCSelectedErgonomically", CC"()Z",            (void*)&WB_IsGCSelectedErgonomically},
2399   {CC"supportsConcurrentGCPhaseControl", CC"()Z",     (void*)&WB_SupportsConcurrentGCPhaseControl},
2400   {CC"requestConcurrentGCPhase0", CC"(Ljava/lang/String;)Z",
2401                                                       (void*)&WB_RequestConcurrentGCPhase},
2402   {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
2403                                                       (void*)&WB_CheckLibSpecifiesNoexecstack},
2404   {CC"isContainerized",           CC"()Z",            (void*)&WB_IsContainerized },
2405   {CC"printOsInfo",               CC"()V",            (void*)&WB_PrintOsInfo },
2406   {CC"disableElfSectionCache",    CC"()V",            (void*)&WB_DisableElfSectionCache },
2407   {CC"resolvedMethodItemsCount",  CC"()J",            (void*)&WB_ResolvedMethodItemsCount },
2408   {CC"protectionDomainRemovedCount",   CC"()I",       (void*)&WB_ProtectionDomainRemovedCount },
2409   {CC"aotLibrariesCount", CC"()I",                    (void*)&WB_AotLibrariesCount },
2410 };
2411 
2412 
2413 #undef CC
2414 
2415 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
2416   {
2417     if (WhiteBoxAPI) {
2418       // Make sure that wbclass is loaded by the null classloader
2419       InstanceKlass* ik = InstanceKlass::cast(JNIHandles::resolve(wbclass)->klass());
2420       Handle loader(THREAD, ik->class_loader());
2421       if (loader.is_null()) {
2422         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
2423         WhiteBox::set_used();
2424       }
2425     }
2426   }
2427 JVM_END