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