1 /*
   2  * Copyright (c) 2012, 2020, 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/javaClasses.inline.hpp"
  31 #include "classfile/modules.hpp"
  32 #include "classfile/protectionDomainCache.hpp"
  33 #include "classfile/stringTable.hpp"
  34 #include "classfile/symbolTable.hpp"
  35 #include "code/codeCache.hpp"
  36 #include "compiler/compilationPolicy.hpp"
  37 #include "compiler/methodMatcher.hpp"
  38 #include "compiler/directivesParser.hpp"
  39 #include "gc/shared/concurrentGCBreakpoints.hpp"
  40 #include "gc/shared/gcConfig.hpp"
  41 #include "gc/shared/genArguments.hpp"
  42 #include "gc/shared/genCollectedHeap.hpp"
  43 #include "jvmtifiles/jvmtiEnv.hpp"
  44 #include "logging/log.hpp"
  45 #include "memory/filemap.hpp"
  46 #include "memory/heapShared.inline.hpp"
  47 #include "memory/metaspaceShared.hpp"
  48 #include "memory/metadataFactory.hpp"
  49 #include "memory/iterator.hpp"
  50 #include "memory/resourceArea.hpp"
  51 #include "memory/universe.hpp"
  52 #include "memory/oopFactory.hpp"
  53 #include "oops/array.hpp"
  54 #include "oops/compressedOops.hpp"
  55 #include "oops/constantPool.inline.hpp"
  56 #include "oops/method.inline.hpp"
  57 #include "oops/objArrayKlass.hpp"
  58 #include "oops/objArrayOop.inline.hpp"
  59 #include "oops/oop.inline.hpp"
  60 #include "oops/typeArrayOop.inline.hpp"
  61 #include "prims/resolvedMethodTable.hpp"
  62 #include "prims/wbtestmethods/parserTests.hpp"
  63 #include "prims/whitebox.inline.hpp"
  64 #include "runtime/arguments.hpp"
  65 #include "runtime/atomic.hpp"
  66 #include "runtime/deoptimization.hpp"
  67 #include "runtime/fieldDescriptor.inline.hpp"
  68 #include "runtime/flags/jvmFlag.hpp"
  69 #include "runtime/frame.inline.hpp"
  70 #include "runtime/handles.inline.hpp"
  71 #include "runtime/handshake.hpp"
  72 #include "runtime/interfaceSupport.inline.hpp"
  73 #include "runtime/javaCalls.hpp"
  74 #include "runtime/jniHandles.inline.hpp"
  75 #include "runtime/os.hpp"
  76 #include "runtime/sweeper.hpp"
  77 #include "runtime/synchronizer.hpp"
  78 #include "runtime/thread.hpp"
  79 #include "runtime/threadSMR.hpp"
  80 #include "runtime/vm_version.hpp"
  81 #include "services/memoryService.hpp"
  82 #include "utilities/align.hpp"
  83 #include "utilities/debug.hpp"
  84 #include "utilities/elfFile.hpp"
  85 #include "utilities/exceptions.hpp"
  86 #include "utilities/macros.hpp"
  87 #if INCLUDE_CDS
  88 #include "prims/cdsoffsets.hpp"
  89 #endif // INCLUDE_CDS
  90 #if INCLUDE_G1GC
  91 #include "gc/g1/g1Arguments.hpp"
  92 #include "gc/g1/g1CollectedHeap.inline.hpp"
  93 #include "gc/g1/g1ConcurrentMark.hpp"
  94 #include "gc/g1/g1ConcurrentMarkThread.hpp"
  95 #include "gc/g1/heapRegionRemSet.hpp"
  96 #include "gc/g1/heterogeneousHeapRegionManager.hpp"
  97 #endif // INCLUDE_G1GC
  98 #if INCLUDE_PARALLELGC
  99 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
 100 #endif // INCLUDE_PARALLELGC
 101 #if INCLUDE_NMT
 102 #include "services/mallocSiteTable.hpp"
 103 #include "services/memTracker.hpp"
 104 #include "utilities/nativeCallStack.hpp"
 105 #endif // INCLUDE_NMT
 106 #if INCLUDE_AOT
 107 #include "aot/aotLoader.hpp"
 108 #endif // INCLUDE_AOT
 109 
 110 #ifdef LINUX
 111 #include "osContainer_linux.hpp"
 112 #include "cgroupSubsystem_linux.hpp"
 113 #endif
 114 
 115 #define SIZE_T_MAX_VALUE ((size_t) -1)
 116 
 117 #define CHECK_JNI_EXCEPTION_(env, value)                               \
 118   do {                                                                 \
 119     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
 120     THREAD->clear_pending_jni_exception_check();                       \
 121     if (HAS_PENDING_EXCEPTION) {                                       \
 122       return(value);                                                   \
 123     }                                                                  \
 124   } while (0)
 125 
 126 #define CHECK_JNI_EXCEPTION(env)                                       \
 127   do {                                                                 \
 128     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
 129     THREAD->clear_pending_jni_exception_check();                       \
 130     if (HAS_PENDING_EXCEPTION) {                                       \
 131       return;                                                          \
 132     }                                                                  \
 133   } while (0)
 134 
 135 bool WhiteBox::_used = false;
 136 volatile bool WhiteBox::compilation_locked = false;
 137 
 138 class VM_WhiteBoxOperation : public VM_Operation {
 139  public:
 140   VM_WhiteBoxOperation()                         { }
 141   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
 142   bool allow_nested_vm_operations() const        { return true; }
 143 };
 144 
 145 
 146 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
 147   return (jlong)(void*)JNIHandles::resolve(obj);
 148 WB_END
 149 
 150 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
 151   return heapOopSize;
 152 WB_END
 153 
 154 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
 155   return os::vm_page_size();
 156 WB_END
 157 
 158 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
 159   return os::vm_allocation_granularity();
 160 WB_END
 161 
 162 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
 163   return os::large_page_size();
 164 WB_END
 165 
 166 class WBIsKlassAliveClosure : public LockedClassesDo {
 167     Symbol* _name;
 168     int _count;
 169 public:
 170     WBIsKlassAliveClosure(Symbol* name) : _name(name), _count(0) {}
 171 
 172     void do_klass(Klass* k) {
 173       Symbol* ksym = k->name();
 174       if (ksym->fast_compare(_name) == 0) {
 175         _count++;
 176       }
 177     }
 178 
 179     int count() const {
 180         return _count;
 181     }
 182 };
 183 
 184 WB_ENTRY(jint, WB_CountAliveClasses(JNIEnv* env, jobject target, jstring name))
 185   oop h_name = JNIHandles::resolve(name);
 186   if (h_name == NULL) return false;
 187   Symbol* sym = java_lang_String::as_symbol(h_name);
 188   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 189 
 190   WBIsKlassAliveClosure closure(sym);
 191   ClassLoaderDataGraph::classes_do(&closure);
 192 
 193   // Return the count of alive classes with this name.
 194   return closure.count();
 195 WB_END
 196 
 197 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
 198   oop h_name = JNIHandles::resolve(name);
 199   if (h_name == NULL) return false;
 200   Symbol* sym = java_lang_String::as_symbol(h_name);
 201   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 202   return (jint)sym->refcount();
 203 WB_END
 204 
 205 
 206 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 207 #if INCLUDE_JVMTI
 208   ResourceMark rm;
 209   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 210   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 211   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 212   assert(err == JVMTI_ERROR_NONE, "must not fail");
 213 #endif
 214 }
 215 WB_END
 216 
 217 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 218 #if INCLUDE_JVMTI
 219   ResourceMark rm;
 220   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 221   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 222   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 223   assert(err == JVMTI_ERROR_NONE, "must not fail");
 224 #endif
 225 }
 226 WB_END
 227 
 228 
 229 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 230   return (jlong)Arguments::max_heap_for_compressed_oops();
 231 }
 232 WB_END
 233 
 234 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 235   tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap " SIZE_FORMAT " "
 236                 "Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
 237                 MinHeapSize,
 238                 InitialHeapSize,
 239                 MaxHeapSize,
 240                 SpaceAlignment,
 241                 HeapAlignment);
 242 }
 243 WB_END
 244 
 245 #ifndef PRODUCT
 246 // Forward declaration
 247 void TestReservedSpace_test();
 248 void TestReserveMemorySpecial_test();
 249 void TestVirtualSpace_test();
 250 #endif
 251 
 252 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 253 #ifndef PRODUCT
 254   TestReservedSpace_test();
 255   TestReserveMemorySpecial_test();
 256   TestVirtualSpace_test();
 257 #endif
 258 WB_END
 259 
 260 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 261   size_t granularity = os::vm_allocation_granularity();
 262   ReservedHeapSpace rhs(100 * granularity, granularity, false);
 263   VirtualSpace vs;
 264   vs.initialize(rhs, 50 * granularity);
 265 
 266   // Check if constraints are complied
 267   if (!( UseCompressedOops && rhs.base() != NULL &&
 268          CompressedOops::base() != NULL &&
 269          CompressedOops::use_implicit_null_checks() )) {
 270     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 271                   "\tUseCompressedOops is %d\n"
 272                   "\trhs.base() is " PTR_FORMAT "\n"
 273                   "\tCompressedOops::base() is " PTR_FORMAT "\n"
 274                   "\tCompressedOops::use_implicit_null_checks() is %d",
 275                   UseCompressedOops,
 276                   p2i(rhs.base()),
 277                   p2i(CompressedOops::base()),
 278                   CompressedOops::use_implicit_null_checks());
 279     return;
 280   }
 281   tty->print_cr("Reading from no access area... ");
 282   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 283                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 284 WB_END
 285 
 286 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 287                                            size_t magnitude, size_t iterations) {
 288   size_t granularity = os::vm_allocation_granularity();
 289   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
 290   VirtualSpace vs;
 291   if (!vs.initialize(rhs, 0)) {
 292     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 293     return 3;
 294   }
 295 
 296   int seed = os::random();
 297   tty->print_cr("Random seed is %d", seed);
 298   os::init_random(seed);
 299 
 300   for (size_t i = 0; i < iterations; i++) {
 301 
 302     // Whether we will shrink or grow
 303     bool shrink = os::random() % 2L == 0;
 304 
 305     // Get random delta to resize virtual space
 306     size_t delta = (size_t)os::random() % magnitude;
 307 
 308     // If we are about to shrink virtual space below zero, then expand instead
 309     if (shrink && vs.committed_size() < delta) {
 310       shrink = false;
 311     }
 312 
 313     // Resizing by delta
 314     if (shrink) {
 315       vs.shrink_by(delta);
 316     } else {
 317       // If expanding fails expand_by will silently return false
 318       vs.expand_by(delta, true);
 319     }
 320   }
 321   return 0;
 322 }
 323 
 324 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 325         jlong reserved_space_size, jlong magnitude, jlong iterations))
 326   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 327                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 328                 iterations);
 329   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 330     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 331     return 1;
 332   }
 333 
 334   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 335   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 336   if (sizeof(size_t) < sizeof(jlong)) {
 337     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 338     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 339         || iterations > size_t_max_value) {
 340       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 341       return 2;
 342     }
 343   }
 344 
 345   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 346                                         (size_t) magnitude, (size_t) iterations);
 347 WB_END
 348 
 349 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
 350   return GCConfig::is_gc_supported((CollectedHeap::Name)name);
 351 WB_END
 352 
 353 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
 354   return GCConfig::is_gc_selected((CollectedHeap::Name)name);
 355 WB_END
 356 
 357 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
 358   return GCConfig::is_gc_selected_ergonomically();
 359 WB_END
 360 
 361 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 362   oop p = JNIHandles::resolve(obj);
 363 #if INCLUDE_G1GC
 364   if (UseG1GC) {
 365     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 366     const HeapRegion* hr = g1h->heap_region_containing(p);
 367     if (hr == NULL) {
 368       return false;
 369     }
 370     return !(hr->is_young());
 371   }
 372 #endif
 373 #if INCLUDE_PARALLELGC
 374   if (UseParallelGC) {
 375     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 376     return !psh->is_in_young(p);
 377   }
 378 #endif
 379 #if INCLUDE_ZGC
 380   if (UseZGC) {
 381     return Universe::heap()->is_in(p);
 382   }
 383 #endif
 384   GenCollectedHeap* gch = GenCollectedHeap::heap();
 385   return !gch->is_in_young(p);
 386 WB_END
 387 
 388 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 389   oop p = JNIHandles::resolve(obj);
 390   return p->size() * HeapWordSize;
 391 WB_END
 392 
 393 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 394   return (jlong)SpaceAlignment;
 395 WB_END
 396 
 397 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
 398   return (jlong)HeapAlignment;
 399 WB_END
 400 
 401 WB_ENTRY(jboolean, WB_SupportsConcurrentGCBreakpoints(JNIEnv* env, jobject o))
 402   return Universe::heap()->supports_concurrent_gc_breakpoints();
 403 WB_END
 404 
 405 WB_ENTRY(void, WB_ConcurrentGCAcquireControl(JNIEnv* env, jobject o))
 406   ConcurrentGCBreakpoints::acquire_control();
 407 WB_END
 408 
 409 WB_ENTRY(void, WB_ConcurrentGCReleaseControl(JNIEnv* env, jobject o))
 410   ConcurrentGCBreakpoints::release_control();
 411 WB_END
 412 
 413 WB_ENTRY(void, WB_ConcurrentGCRunToIdle(JNIEnv* env, jobject o))
 414   ConcurrentGCBreakpoints::run_to_idle();
 415 WB_END
 416 
 417 WB_ENTRY(jboolean, WB_ConcurrentGCRunTo(JNIEnv* env, jobject o, jobject at))
 418   Handle h_name(THREAD, JNIHandles::resolve(at));
 419   ResourceMark rm;
 420   const char* c_name = java_lang_String::as_utf8_string(h_name());
 421   return ConcurrentGCBreakpoints::run_to(c_name);
 422 WB_END
 423 
 424 #if INCLUDE_G1GC
 425 
 426 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 427   if (UseG1GC) {
 428     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 429     oop result = JNIHandles::resolve(obj);
 430     const HeapRegion* hr = g1h->heap_region_containing(result);
 431     return hr->is_humongous();
 432   }
 433   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
 434 WB_END
 435 
 436 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 437   if (UseG1GC) {
 438     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 439     const HeapRegion* hr = g1h->heap_region_containing((void*) addr);
 440     return hr->is_humongous();
 441   }
 442   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
 443 WB_END
 444 
 445 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 446   if (UseG1GC) {
 447     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 448     const HeapRegion* hr = g1h->heap_region_containing((void*) addr);
 449     return hr->is_free();
 450   }
 451   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
 452 WB_END
 453 
 454 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 455   if (UseG1GC) {
 456     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 457     size_t nr = g1h->max_regions();
 458     return (jlong)nr;
 459   }
 460   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
 461 WB_END
 462 
 463 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 464   if (UseG1GC) {
 465     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 466     size_t nr = g1h->num_free_regions();
 467     return (jlong)nr;
 468   }
 469   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
 470 WB_END
 471 
 472 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 473   if (UseG1GC) {
 474     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 475     return g1h->concurrent_mark()->cm_thread()->during_cycle();
 476   }
 477   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
 478 WB_END
 479 
 480 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
 481   if (UseG1GC) {
 482     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 483     if (!g1h->concurrent_mark()->cm_thread()->during_cycle()) {
 484       g1h->collect(GCCause::_wb_conc_mark);
 485       return true;
 486     }
 487     return false;
 488   }
 489   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1StartMarkCycle: G1 GC is not enabled");
 490 WB_END
 491 
 492 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 493   if (UseG1GC) {
 494     return (jint)HeapRegion::GrainBytes;
 495   }
 496   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
 497 WB_END
 498 
 499 #endif // INCLUDE_G1GC
 500 
 501 #if INCLUDE_G1GC || INCLUDE_PARALLELGC
 502 WB_ENTRY(jlong, WB_DramReservedStart(JNIEnv* env, jobject o))
 503 #if INCLUDE_G1GC
 504   if (UseG1GC) {
 505     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 506     if (g1h->is_heterogeneous_heap()) {
 507       uint start_region = HeterogeneousHeapRegionManager::manager()->start_index_of_dram();
 508       return (jlong)(g1h->base() + start_region * HeapRegion::GrainBytes);
 509     } else {
 510       return (jlong)g1h->base();
 511     }
 512   }
 513 #endif // INCLUDE_G1GC
 514 #if INCLUDE_PARALLELGC
 515   if (UseParallelGC) {
 516     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 517     if (AllocateOldGenAt != NULL) {
 518       MemRegion reserved = ps_heap->young_gen()->reserved();
 519       return (jlong)reserved.start();
 520     } else {
 521       return (jlong)ps_heap->base();
 522     }
 523   }
 524 #endif // INCLUDE_PARALLELGC
 525   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_DramReservedStart: enabled only for G1 and Parallel GC");
 526 WB_END
 527 
 528 WB_ENTRY(jlong, WB_DramReservedEnd(JNIEnv* env, jobject o))
 529 #if INCLUDE_G1GC
 530   if (UseG1GC) {
 531     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 532     if (g1h->is_heterogeneous_heap()) {
 533       uint end_region = HeterogeneousHeapRegionManager::manager()->end_index_of_dram();
 534       return (jlong)(g1h->base() + (end_region + 1) * HeapRegion::GrainBytes - 1);
 535     } else {
 536       return (jlong)g1h->base() + G1Arguments::heap_max_size_bytes();
 537     }
 538   }
 539 #endif // INCLUDE_G1GC
 540 #if INCLUDE_PARALLELGC
 541   if (UseParallelGC) {
 542     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 543     if (AllocateOldGenAt != NULL) {
 544       MemRegion reserved = ps_heap->young_gen()->reserved();
 545       return (jlong)reserved.end();
 546     } else {
 547       return (jlong)ps_heap->reserved_region().end();
 548     }
 549   }
 550 #endif // INCLUDE_PARALLELGC
 551   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_DramReservedEnd: enabled only for G1 and Parallel GC");
 552 WB_END
 553 
 554 WB_ENTRY(jlong, WB_NvdimmReservedStart(JNIEnv* env, jobject o))
 555 #if INCLUDE_G1GC
 556   if (UseG1GC) {
 557     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 558     if (g1h->is_heterogeneous_heap()) {
 559       uint start_region = HeterogeneousHeapRegionManager::manager()->start_index_of_nvdimm();
 560       return (jlong)(g1h->base() + start_region * HeapRegion::GrainBytes);
 561     } else {
 562       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedStart: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 563     }
 564   }
 565 #endif // INCLUDE_G1GC
 566 #if INCLUDE_PARALLELGC
 567   if (UseParallelGC) {
 568     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 569     if (AllocateOldGenAt != NULL) {
 570       MemRegion reserved = ps_heap->old_gen()->reserved();
 571       return (jlong)reserved.start();
 572     } else {
 573       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedStart: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 574     }
 575   }
 576 #endif // INCLUDE_PARALLELGC
 577   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedStart: enabled only for G1 and Parallel GC");
 578 WB_END
 579 
 580 WB_ENTRY(jlong, WB_NvdimmReservedEnd(JNIEnv* env, jobject o))
 581 #if INCLUDE_G1GC
 582   if (UseG1GC) {
 583     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 584     if (g1h->is_heterogeneous_heap()) {
 585       uint end_region = HeterogeneousHeapRegionManager::manager()->start_index_of_nvdimm();
 586       return (jlong)(g1h->base() + (end_region + 1) * HeapRegion::GrainBytes - 1);
 587     } else {
 588       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedEnd: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 589     }
 590   }
 591 #endif // INCLUDE_G1GC
 592 #if INCLUDE_PARALLELGC
 593   if (UseParallelGC) {
 594     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 595     if (AllocateOldGenAt != NULL) {
 596       MemRegion reserved = ps_heap->old_gen()->reserved();
 597       return (jlong)reserved.end();
 598       } else {
 599       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedEnd: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 600     }
 601   }
 602 #endif // INCLUDE_PARALLELGC
 603   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedEnd: enabled only for G1 and Parallel GC");
 604 WB_END
 605 
 606 #endif // INCLUDE_G1GC || INCLUDE_PARALLELGC
 607 
 608 #if INCLUDE_PARALLELGC
 609 
 610 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
 611   if (UseParallelGC) {
 612     return GenAlignment;
 613   }
 614   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
 615 WB_END
 616 
 617 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
 618   if (UseParallelGC) {
 619     return GenAlignment;
 620   }
 621   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
 622 WB_END
 623 
 624 #endif // INCLUDE_PARALLELGC
 625 
 626 #if INCLUDE_G1GC
 627 
 628 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 629   if (UseG1GC) {
 630     ResourceMark rm(THREAD);
 631     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 632     MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 633     Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 634     return JNIHandles::make_local(env, h());
 635   }
 636   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
 637 WB_END
 638 
 639 WB_ENTRY(jint, WB_G1ActiveMemoryNodeCount(JNIEnv* env, jobject o))
 640   if (UseG1GC) {
 641     G1NUMA* numa = G1NUMA::numa();
 642     return (jint)numa->num_active_nodes();
 643   }
 644   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1ActiveMemoryNodeCount: G1 GC is not enabled");
 645 WB_END
 646 
 647 WB_ENTRY(jintArray, WB_G1MemoryNodeIds(JNIEnv* env, jobject o))
 648   if (UseG1GC) {
 649     G1NUMA* numa = G1NUMA::numa();
 650     int num_node_ids = (int)numa->num_active_nodes();
 651     const int* node_ids = numa->node_ids();
 652 
 653     typeArrayOop result = oopFactory::new_intArray(num_node_ids, CHECK_NULL);
 654     for (int i = 0; i < num_node_ids; i++) {
 655       result->int_at_put(i, (jint)node_ids[i]);
 656     }
 657     return (jintArray) JNIHandles::make_local(env, result);
 658   }
 659   THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1MemoryNodeIds: G1 GC is not enabled");
 660 WB_END
 661 
 662 class OldRegionsLivenessClosure: public HeapRegionClosure {
 663 
 664  private:
 665   const int _liveness;
 666   size_t _total_count;
 667   size_t _total_memory;
 668   size_t _total_memory_to_free;
 669 
 670  public:
 671   OldRegionsLivenessClosure(int liveness) :
 672     _liveness(liveness),
 673     _total_count(0),
 674     _total_memory(0),
 675     _total_memory_to_free(0) { }
 676 
 677     size_t total_count() { return _total_count; }
 678     size_t total_memory() { return _total_memory; }
 679     size_t total_memory_to_free() { return _total_memory_to_free; }
 680 
 681   bool do_heap_region(HeapRegion* r) {
 682     if (r->is_old()) {
 683       size_t prev_live = r->marked_bytes();
 684       size_t live = r->live_bytes();
 685       size_t size = r->used();
 686       size_t reg_size = HeapRegion::GrainBytes;
 687       if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
 688         _total_memory += size;
 689         ++_total_count;
 690         if (size == reg_size) {
 691         // we don't include non-full regions since they are unlikely included in mixed gc
 692         // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
 693           _total_memory_to_free += size - prev_live;
 694         }
 695       }
 696     }
 697     return false;
 698   }
 699 };
 700 
 701 
 702 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
 703   if (!UseG1GC) {
 704     THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
 705   }
 706   if (liveness < 0) {
 707     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
 708   }
 709 
 710   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 711   OldRegionsLivenessClosure rli(liveness);
 712   g1h->heap_region_iterate(&rli);
 713 
 714   typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
 715   result->long_at_put(0, rli.total_count());
 716   result->long_at_put(1, rli.total_memory());
 717   result->long_at_put(2, rli.total_memory_to_free());
 718   return (jlongArray) JNIHandles::make_local(env, result);
 719 WB_END
 720 
 721 #endif // INCLUDE_G1GC
 722 
 723 #if INCLUDE_NMT
 724 // Alloc memory using the test memory type so that we can use that to see if
 725 // NMT picks it up correctly
 726 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 727   jlong addr = 0;
 728   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 729   return addr;
 730 WB_END
 731 
 732 // Alloc memory with pseudo call stack. The test can create psudo malloc
 733 // allocation site to stress the malloc tracking.
 734 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 735   address pc = (address)(size_t)pseudo_stack;
 736   NativeCallStack stack(&pc, 1);
 737   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 738 WB_END
 739 
 740 // Alloc memory with pseudo call stack and specific memory type.
 741 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint type))
 742   address pc = (address)(size_t)pseudo_stack;
 743   NativeCallStack stack(&pc, 1);
 744   return (jlong)(uintptr_t)os::malloc(size, (MEMFLAGS)type, stack);
 745 WB_END
 746 
 747 // Free the memory allocated by NMTAllocTest
 748 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 749   os::free((void*)(uintptr_t)mem);
 750 WB_END
 751 
 752 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 753   jlong addr = 0;
 754 
 755   addr = (jlong)(uintptr_t)os::reserve_memory(size);
 756   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 757 
 758   return addr;
 759 WB_END
 760 
 761 WB_ENTRY(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
 762   addr = (jlong)(uintptr_t)os::attempt_reserve_memory_at((size_t)size, (char*)(uintptr_t)addr);
 763   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 764 
 765   return addr;
 766 WB_END
 767 
 768 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 769   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 770   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 771 WB_END
 772 
 773 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 774   os::uncommit_memory((char *)(uintptr_t)addr, size);
 775 WB_END
 776 
 777 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 778   os::release_memory((char *)(uintptr_t)addr, size);
 779 WB_END
 780 
 781 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 782   // Test that we can downgrade NMT levels but not upgrade them.
 783   if (MemTracker::tracking_level() == NMT_off) {
 784     MemTracker::transition_to(NMT_off);
 785     return MemTracker::tracking_level() == NMT_off;
 786   } else {
 787     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 788     MemTracker::transition_to(NMT_summary);
 789     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 790 
 791     // Can't go to detail once NMT is set to summary.
 792     MemTracker::transition_to(NMT_detail);
 793     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 794 
 795     // Shutdown sets tracking level to minimal.
 796     MemTracker::shutdown();
 797     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 798 
 799     // Once the tracking level is minimal, we cannot increase to summary.
 800     // The code ignores this request instead of asserting because if the malloc site
 801     // table overflows in another thread, it tries to change the code to summary.
 802     MemTracker::transition_to(NMT_summary);
 803     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 804 
 805     // Really can never go up to detail, verify that the code would never do this.
 806     MemTracker::transition_to(NMT_detail);
 807     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 808     return MemTracker::tracking_level() == NMT_minimal;
 809   }
 810 WB_END
 811 
 812 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 813   int hash_size = MallocSiteTable::hash_buckets();
 814   assert(hash_size > 0, "NMT hash_size should be > 0");
 815   return (jint)hash_size;
 816 WB_END
 817 
 818 WB_ENTRY(jlong, WB_NMTNewArena(JNIEnv* env, jobject o, jlong init_size))
 819   Arena* arena =  new (mtTest) Arena(mtTest, size_t(init_size));
 820   return (jlong)arena;
 821 WB_END
 822 
 823 WB_ENTRY(void, WB_NMTFreeArena(JNIEnv* env, jobject o, jlong arena))
 824   Arena* a = (Arena*)arena;
 825   delete a;
 826 WB_END
 827 
 828 WB_ENTRY(void, WB_NMTArenaMalloc(JNIEnv* env, jobject o, jlong arena, jlong size))
 829   Arena* a = (Arena*)arena;
 830   a->Amalloc(size_t(size));
 831 WB_END
 832 #endif // INCLUDE_NMT
 833 
 834 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 835   assert(method != NULL, "method should not be null");
 836   ThreadToNativeFromVM ttn(thread);
 837   return env->FromReflectedMethod(method);
 838 }
 839 
 840 static CompLevel highestCompLevel() {
 841   return TieredCompilation ? MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier) : CompLevel_highest_tier;
 842 }
 843 
 844 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 845 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 846  private:
 847   int _result;
 848   const bool _make_not_entrant;
 849  public:
 850   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 851         _result(0), _make_not_entrant(make_not_entrant) { }
 852   int  result() const { return _result; }
 853 
 854   void doit() {
 855     for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
 856       if (t->has_last_Java_frame()) {
 857         for (StackFrameStream fst(t, false); !fst.is_done(); fst.next()) {
 858           frame* f = fst.current();
 859           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 860             Deoptimization::deoptimize(t, *f);
 861             if (_make_not_entrant) {
 862                 CompiledMethod* cm = CodeCache::find_compiled(f->pc());
 863                 assert(cm != NULL, "sanity check");
 864                 cm->make_not_entrant();
 865             }
 866             ++_result;
 867           }
 868         }
 869       }
 870     }
 871   }
 872 };
 873 
 874 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 875   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 876   VMThread::execute(&op);
 877   return op.result();
 878 WB_END
 879 
 880 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 881   CodeCache::mark_all_nmethods_for_deoptimization();
 882   Deoptimization::deoptimize_all_marked();
 883 WB_END
 884 
 885 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 886   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 887   int result = 0;
 888   CHECK_JNI_EXCEPTION_(env, result);
 889   MutexLocker mu(Compile_lock);
 890   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 891   if (is_osr) {
 892     result += mh->mark_osr_nmethods();
 893   } else if (mh->code() != NULL) {
 894     mh->code()->mark_for_deoptimization();
 895     ++result;
 896   }
 897   result += CodeCache::mark_for_deoptimization(mh());
 898   if (result > 0) {
 899     Deoptimization::deoptimize_all_marked();
 900   }
 901   return result;
 902 WB_END
 903 
 904 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 905   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 906   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 907   MutexLocker mu(Compile_lock);
 908   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 909   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 910   if (code == NULL) {
 911     return JNI_FALSE;
 912   }
 913   return (code->is_alive() && !code->is_marked_for_deoptimization());
 914 WB_END
 915 
 916 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 917   if (method == NULL || comp_level > highestCompLevel()) {
 918     return false;
 919   }
 920   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 921   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 922   MutexLocker mu(Compile_lock);
 923   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 924   if (is_osr) {
 925     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 926   } else {
 927     return CompilationPolicy::can_be_compiled(mh, comp_level);
 928   }
 929 WB_END
 930 
 931 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 932   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 933   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 934   MutexLocker mu(Compile_lock);
 935   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 936   return mh->queued_for_compilation();
 937 WB_END
 938 
 939 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 940   if (compLevel < CompLevel_none || compLevel > highestCompLevel()) {
 941     return false; // Intrinsic is not available on a non-existent compilation level.
 942   }
 943   jmethodID method_id, compilation_context_id;
 944   method_id = reflected_method_to_jmid(thread, env, method);
 945   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 946   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 947 
 948   DirectiveSet* directive;
 949   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 950   assert(comp != NULL, "compiler not available");
 951   if (compilation_context != NULL) {
 952     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 953     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 954     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 955     directive = DirectivesStack::getMatchingDirective(cch, comp);
 956   } else {
 957     // Calling with NULL matches default directive
 958     directive = DirectivesStack::getDefaultDirective(comp);
 959   }
 960   bool result = comp->is_intrinsic_available(mh, directive);
 961   DirectivesStack::release(directive);
 962   return result;
 963 WB_END
 964 
 965 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 966   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 967   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 968   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 969   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 970   return (code != NULL ? code->comp_level() : CompLevel_none);
 971 WB_END
 972 
 973 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 974   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 975   CHECK_JNI_EXCEPTION(env);
 976   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 977   if (is_osr) {
 978     mh->set_not_osr_compilable("WhiteBox", comp_level);
 979   } else {
 980     mh->set_not_compilable("WhiteBox", comp_level);
 981   }
 982 WB_END
 983 
 984 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 985   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 986   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 987   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 988   CompiledMethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 989   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 990 WB_END
 991 
 992 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 993   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 994   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 995   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 996   bool result = mh->dont_inline();
 997   mh->set_dont_inline(value == JNI_TRUE);
 998   return result;
 999 WB_END
1000 
1001 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
1002   if (comp_level == CompLevel_any) {
1003     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
1004         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
1005   } else {
1006     return CompileBroker::queue_size(comp_level);
1007   }
1008 WB_END
1009 
1010 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1011   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1012   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1013   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1014   bool result = mh->force_inline();
1015   mh->set_force_inline(value == JNI_TRUE);
1016   return result;
1017 WB_END
1018 
1019 #ifdef LINUX
1020 bool WhiteBox::validate_cgroup(const char* proc_cgroups,
1021                                const char* proc_self_cgroup,
1022                                const char* proc_self_mountinfo,
1023                                u1* cg_flags) {
1024   CgroupInfo cg_infos[4];
1025   return CgroupSubsystemFactory::determine_type(cg_infos, proc_cgroups,
1026                                                     proc_self_cgroup,
1027                                                     proc_self_mountinfo, cg_flags);
1028 }
1029 #endif
1030 
1031 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
1032   // Screen for unavailable/bad comp level or null method
1033   AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1034   if (method == NULL) {
1035     tty->print_cr("WB error: request to compile NULL method");
1036     return false;
1037   }
1038   if (comp_level > highestCompLevel()) {
1039     tty->print_cr("WB error: invalid compilation level %d", comp_level);
1040     return false;
1041   }
1042   if (comp == NULL) {
1043     tty->print_cr("WB error: no compiler for requested compilation level %d", comp_level);
1044     return false;
1045   }
1046 
1047   // Check if compilation is blocking
1048   methodHandle mh(THREAD, method);
1049   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
1050   bool is_blocking = !directive->BackgroundCompilationOption;
1051   DirectivesStack::release(directive);
1052 
1053   // Compile method and check result
1054   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, THREAD);
1055   MutexLocker mu(THREAD, Compile_lock);
1056   bool is_queued = mh->queued_for_compilation();
1057   if ((!is_blocking && is_queued) || nm != NULL) {
1058     return true;
1059   }
1060   tty->print("WB error: failed to %s compile at level %d method ", is_blocking ? "blocking" : "", comp_level);
1061   mh->print_short_name(tty);
1062   tty->cr();
1063   if (is_blocking && is_queued) {
1064     tty->print_cr("WB error: blocking compilation is still in queue!");
1065   }
1066   return false;
1067 }
1068 
1069 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1070   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1071   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1072   return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1073 WB_END
1074 
1075 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1076   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1077   Method* clinit = ik->class_initializer();
1078   if (clinit == NULL) {
1079     return false;
1080   }
1081   return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1082 WB_END
1083 
1084 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1085   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1086   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1087 
1088   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1089   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
1090   bool result = directive->PrintAssemblyOption;
1091   DirectivesStack::release(directive);
1092 
1093   return result;
1094 WB_END
1095 
1096 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1097   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1098   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1099 
1100   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1101 
1102   ResourceMark rm(THREAD);
1103   const char* error_msg = NULL;
1104   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1105   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1106 
1107   if (m == NULL) {
1108     assert(error_msg != NULL, "Always have an error message");
1109     tty->print_cr("Got error: %s", error_msg);
1110     return -1; // Pattern failed
1111   }
1112 
1113   // Pattern works - now check if it matches
1114   int result;
1115   if (m->match(mh, InlineMatcher::force_inline)) {
1116     result = 2; // Force inline match
1117   } else if (m->match(mh, InlineMatcher::dont_inline)) {
1118     result = 1; // Dont inline match
1119   } else {
1120     result = 0; // No match
1121   }
1122   delete m;
1123   return result;
1124 WB_END
1125 
1126 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1127   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1128   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1129 
1130   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1131 
1132   ResourceMark rm;
1133   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1134 
1135   const char* error_msg = NULL;
1136 
1137   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
1138   if (m == NULL) {
1139     assert(error_msg != NULL, "Must have error_msg");
1140     tty->print_cr("Got error: %s", error_msg);
1141     return -1;
1142   }
1143 
1144   // Pattern works - now check if it matches
1145   int result = m->matches(mh);
1146   delete m;
1147   assert(result == 0 || result == 1, "Result out of range");
1148   return result;
1149 WB_END
1150 
1151 WB_ENTRY(void, WB_MarkMethodProfiled(JNIEnv* env, jobject o, jobject method))
1152   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1153   CHECK_JNI_EXCEPTION(env);
1154   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1155 
1156   MethodData* mdo = mh->method_data();
1157   if (mdo == NULL) {
1158     Method::build_interpreter_method_data(mh, CHECK_AND_CLEAR);
1159     mdo = mh->method_data();
1160   }
1161   mdo->init();
1162   InvocationCounter* icnt = mdo->invocation_counter();
1163   InvocationCounter* bcnt = mdo->backedge_counter();
1164   // set i-counter according to TieredThresholdPolicy::is_method_profiled
1165   icnt->set(Tier4MinInvocationThreshold);
1166   bcnt->set(Tier4CompileThreshold);
1167 WB_END
1168 
1169 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1170   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1171   CHECK_JNI_EXCEPTION(env);
1172   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1173   MutexLocker mu(THREAD, Compile_lock);
1174   MethodData* mdo = mh->method_data();
1175   MethodCounters* mcs = mh->method_counters();
1176 
1177   if (mdo != NULL) {
1178     mdo->init();
1179     ResourceMark rm(THREAD);
1180     int arg_count = mdo->method()->size_of_parameters();
1181     for (int i = 0; i < arg_count; i++) {
1182       mdo->set_arg_modified(i, 0);
1183     }
1184     MutexLocker mu(THREAD, mdo->extra_data_lock());
1185     mdo->clean_method_data(/*always_clean*/true);
1186   }
1187 
1188   mh->clear_not_c1_compilable();
1189   mh->clear_not_c2_compilable();
1190   mh->clear_not_c2_osr_compilable();
1191   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1192   if (mcs != NULL) {
1193     mcs->backedge_counter()->init();
1194     mcs->invocation_counter()->init();
1195     mcs->set_interpreter_invocation_count(0);
1196     mcs->set_interpreter_throwout_count(0);
1197 
1198 #ifdef TIERED
1199     mcs->set_rate(0.0F);
1200     mh->set_prev_event_count(0);
1201     mh->set_prev_time(0);
1202 #endif
1203   }
1204 WB_END
1205 
1206 template <typename T>
1207 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, JVMFlag::Error (*TAt)(const JVMFlag*, T*)) {
1208   if (name == NULL) {
1209     return false;
1210   }
1211   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1212   const char* flag_name = env->GetStringUTFChars(name, NULL);
1213   CHECK_JNI_EXCEPTION_(env, false);
1214   const JVMFlag* flag = JVMFlag::find_declared_flag(flag_name);
1215   JVMFlag::Error result = (*TAt)(flag, value);
1216   env->ReleaseStringUTFChars(name, flag_name);
1217   return (result == JVMFlag::SUCCESS);
1218 }
1219 
1220 template <typename T>
1221 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, JVMFlag::Error (*TAtPut)(JVMFlag* flag, T*, JVMFlag::Flags)) {
1222   if (name == NULL) {
1223     return false;
1224   }
1225   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1226   const char* flag_name = env->GetStringUTFChars(name, NULL);
1227   CHECK_JNI_EXCEPTION_(env, false);
1228   JVMFlag* flag = JVMFlag::find_flag(flag_name);
1229   JVMFlag::Error result = (*TAtPut)(flag, value, JVMFlag::INTERNAL);
1230   env->ReleaseStringUTFChars(name, flag_name);
1231   return (result == JVMFlag::SUCCESS);
1232 }
1233 
1234 template <typename T>
1235 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1236   ResourceMark rm(thread);
1237   jclass clazz = env->FindClass(name->as_C_string());
1238   CHECK_JNI_EXCEPTION_(env, NULL);
1239   jmethodID methodID = env->GetStaticMethodID(clazz,
1240         vmSymbols::valueOf_name()->as_C_string(),
1241         sig->as_C_string());
1242   CHECK_JNI_EXCEPTION_(env, NULL);
1243   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1244   CHECK_JNI_EXCEPTION_(env, NULL);
1245   return result;
1246 }
1247 
1248 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1249   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1250 }
1251 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1252   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1253 }
1254 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1255   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1256 }
1257 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1258   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1259 }*/
1260 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1261   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1262 }
1263 
1264 static const JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1265   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1266   const char* flag_name = env->GetStringUTFChars(name, NULL);
1267   CHECK_JNI_EXCEPTION_(env, NULL);
1268   const JVMFlag* result = JVMFlag::find_declared_flag(flag_name);
1269   env->ReleaseStringUTFChars(name, flag_name);
1270   return result;
1271 }
1272 
1273 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1274   const JVMFlag* flag = getVMFlag(thread, env, name);
1275   return (flag != NULL) && flag->is_constant_in_binary();
1276 WB_END
1277 
1278 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1279   const JVMFlag* flag = getVMFlag(thread, env, name);
1280   return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
1281 WB_END
1282 
1283 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1284   bool result;
1285   if (GetVMFlag <bool> (thread, env, name, &result, &JVMFlag::boolAt)) {
1286     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1287     return booleanBox(thread, env, result);
1288   }
1289   return NULL;
1290 WB_END
1291 
1292 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1293   int result;
1294   if (GetVMFlag <int> (thread, env, name, &result, &JVMFlag::intAt)) {
1295     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1296     return longBox(thread, env, result);
1297   }
1298   return NULL;
1299 WB_END
1300 
1301 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1302   uint result;
1303   if (GetVMFlag <uint> (thread, env, name, &result, &JVMFlag::uintAt)) {
1304     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1305     return longBox(thread, env, result);
1306   }
1307   return NULL;
1308 WB_END
1309 
1310 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1311   intx result;
1312   if (GetVMFlag <intx> (thread, env, name, &result, &JVMFlag::intxAt)) {
1313     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1314     return longBox(thread, env, result);
1315   }
1316   return NULL;
1317 WB_END
1318 
1319 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1320   uintx result;
1321   if (GetVMFlag <uintx> (thread, env, name, &result, &JVMFlag::uintxAt)) {
1322     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1323     return longBox(thread, env, result);
1324   }
1325   return NULL;
1326 WB_END
1327 
1328 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1329   uint64_t result;
1330   if (GetVMFlag <uint64_t> (thread, env, name, &result, &JVMFlag::uint64_tAt)) {
1331     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1332     return longBox(thread, env, result);
1333   }
1334   return NULL;
1335 WB_END
1336 
1337 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1338   size_t result;
1339   if (GetVMFlag <size_t> (thread, env, name, &result, &JVMFlag::size_tAt)) {
1340     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1341     return longBox(thread, env, result);
1342   }
1343   return NULL;
1344 WB_END
1345 
1346 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1347   double result;
1348   if (GetVMFlag <double> (thread, env, name, &result, &JVMFlag::doubleAt)) {
1349     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1350     return doubleBox(thread, env, result);
1351   }
1352   return NULL;
1353 WB_END
1354 
1355 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1356   ccstr ccstrResult;
1357   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &JVMFlag::ccstrAt)) {
1358     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1359     jstring result = env->NewStringUTF(ccstrResult);
1360     CHECK_JNI_EXCEPTION_(env, NULL);
1361     return result;
1362   }
1363   return NULL;
1364 WB_END
1365 
1366 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1367   bool result = value == JNI_TRUE ? true : false;
1368   SetVMFlag <bool> (thread, env, name, &result, &JVMFlag::boolAtPut);
1369 WB_END
1370 
1371 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1372   int result = value;
1373   SetVMFlag <int> (thread, env, name, &result, &JVMFlag::intAtPut);
1374 WB_END
1375 
1376 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1377   uint result = value;
1378   SetVMFlag <uint> (thread, env, name, &result, &JVMFlag::uintAtPut);
1379 WB_END
1380 
1381 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1382   intx result = value;
1383   SetVMFlag <intx> (thread, env, name, &result, &JVMFlag::intxAtPut);
1384 WB_END
1385 
1386 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1387   uintx result = value;
1388   SetVMFlag <uintx> (thread, env, name, &result, &JVMFlag::uintxAtPut);
1389 WB_END
1390 
1391 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1392   uint64_t result = value;
1393   SetVMFlag <uint64_t> (thread, env, name, &result, &JVMFlag::uint64_tAtPut);
1394 WB_END
1395 
1396 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1397   size_t result = value;
1398   SetVMFlag <size_t> (thread, env, name, &result, &JVMFlag::size_tAtPut);
1399 WB_END
1400 
1401 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1402   double result = value;
1403   SetVMFlag <double> (thread, env, name, &result, &JVMFlag::doubleAtPut);
1404 WB_END
1405 
1406 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1407   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1408   const char* ccstrValue;
1409   if (value == NULL) {
1410     ccstrValue = NULL;
1411   }
1412   else {
1413     ccstrValue = env->GetStringUTFChars(value, NULL);
1414     CHECK_JNI_EXCEPTION(env);
1415   }
1416   ccstr ccstrResult = ccstrValue;
1417   bool needFree;
1418   {
1419     ThreadInVMfromNative ttvfn(thread); // back to VM
1420     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &JVMFlag::ccstrAtPut);
1421   }
1422   if (value != NULL) {
1423     env->ReleaseStringUTFChars(value, ccstrValue);
1424   }
1425   if (needFree) {
1426     FREE_C_HEAP_ARRAY(char, ccstrResult);
1427   }
1428 WB_END
1429 
1430 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1431   WhiteBox::compilation_locked = true;
1432 WB_END
1433 
1434 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1435   MonitorLocker mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1436   WhiteBox::compilation_locked = false;
1437   mo.notify_all();
1438 WB_END
1439 
1440 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
1441   // Force a code cache sweep and block until it finished
1442   NMethodSweeper::force_sweep();
1443 WB_END
1444 
1445 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1446   ResourceMark rm(THREAD);
1447   int len;
1448   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1449   return (StringTable::lookup(name, len) != NULL);
1450 WB_END
1451 
1452 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1453   Universe::heap()->soft_ref_policy()->set_should_clear_all_soft_refs(true);
1454   Universe::heap()->collect(GCCause::_wb_full_gc);
1455 #if INCLUDE_G1GC
1456   if (UseG1GC) {
1457     // Needs to be cleared explicitly for G1
1458     Universe::heap()->soft_ref_policy()->set_should_clear_all_soft_refs(false);
1459   }
1460 #endif // INCLUDE_G1GC
1461 WB_END
1462 
1463 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1464   Universe::heap()->collect(GCCause::_wb_young_gc);
1465 WB_END
1466 
1467 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1468   // static+volatile in order to force the read to happen
1469   // (not be eliminated by the compiler)
1470   static char c;
1471   static volatile char* p;
1472 
1473   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1474   if (p == NULL) {
1475     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1476   }
1477 
1478   c = *p;
1479 WB_END
1480 
1481 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1482   const char* features = VM_Version::features_string();
1483   ThreadToNativeFromVM ttn(thread);
1484   jstring features_string = env->NewStringUTF(features);
1485 
1486   CHECK_JNI_EXCEPTION_(env, NULL);
1487 
1488   return features_string;
1489 WB_END
1490 
1491 int WhiteBox::get_blob_type(const CodeBlob* code) {
1492   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1493   if (code->is_aot()) {
1494     return -1;
1495   }
1496   return CodeCache::get_code_heap(code)->code_blob_type();
1497 }
1498 
1499 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1500   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1501   return CodeCache::get_code_heap(blob_type);
1502 }
1503 
1504 struct CodeBlobStub {
1505   CodeBlobStub(const CodeBlob* blob) :
1506       name(os::strdup(blob->name())),
1507       size(blob->size()),
1508       blob_type(WhiteBox::get_blob_type(blob)),
1509       address((jlong) blob) { }
1510   ~CodeBlobStub() { os::free((void*) name); }
1511   const char* const name;
1512   const jint        size;
1513   const jint        blob_type;
1514   const jlong       address;
1515 };
1516 
1517 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1518   ResourceMark rm;
1519   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1520   CHECK_JNI_EXCEPTION_(env, NULL);
1521   jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1522 
1523   jstring name = env->NewStringUTF(cb->name);
1524   CHECK_JNI_EXCEPTION_(env, NULL);
1525   env->SetObjectArrayElement(result, 0, name);
1526 
1527   jobject obj = integerBox(thread, env, cb->size);
1528   CHECK_JNI_EXCEPTION_(env, NULL);
1529   env->SetObjectArrayElement(result, 1, obj);
1530 
1531   obj = integerBox(thread, env, cb->blob_type);
1532   CHECK_JNI_EXCEPTION_(env, NULL);
1533   env->SetObjectArrayElement(result, 2, obj);
1534 
1535   obj = longBox(thread, env, cb->address);
1536   CHECK_JNI_EXCEPTION_(env, NULL);
1537   env->SetObjectArrayElement(result, 3, obj);
1538 
1539   return result;
1540 }
1541 
1542 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1543   ResourceMark rm(THREAD);
1544   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1545   CHECK_JNI_EXCEPTION_(env, NULL);
1546   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1547   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1548   jobjectArray result = NULL;
1549   if (code == NULL) {
1550     return result;
1551   }
1552   int comp_level = code->comp_level();
1553   int insts_size = comp_level == CompLevel_aot ? code->code_end() - code->code_begin() : code->insts_size();
1554 
1555   ThreadToNativeFromVM ttn(thread);
1556   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1557   CHECK_JNI_EXCEPTION_(env, NULL);
1558   result = env->NewObjectArray(5, clazz, NULL);
1559   if (result == NULL) {
1560     return result;
1561   }
1562 
1563   CodeBlobStub stub(code);
1564   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1565   CHECK_JNI_EXCEPTION_(env, NULL);
1566   env->SetObjectArrayElement(result, 0, codeBlob);
1567 
1568   jobject level = integerBox(thread, env, comp_level);
1569   CHECK_JNI_EXCEPTION_(env, NULL);
1570   env->SetObjectArrayElement(result, 1, level);
1571 
1572   jbyteArray insts = env->NewByteArray(insts_size);
1573   CHECK_JNI_EXCEPTION_(env, NULL);
1574   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1575   env->SetObjectArrayElement(result, 2, insts);
1576 
1577   jobject id = integerBox(thread, env, code->compile_id());
1578   CHECK_JNI_EXCEPTION_(env, NULL);
1579   env->SetObjectArrayElement(result, 3, id);
1580 
1581   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1582   CHECK_JNI_EXCEPTION_(env, NULL);
1583   env->SetObjectArrayElement(result, 4, entry_point);
1584 
1585   return result;
1586 WB_END
1587 
1588 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1589   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1590   BufferBlob* blob;
1591   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1592   if (full_size < size) {
1593     full_size += align_up(size - full_size, oopSize);
1594   }
1595   {
1596     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1597     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1598     if (blob != NULL) {
1599       ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1600     }
1601   }
1602   // Track memory usage statistic after releasing CodeCache_lock
1603   MemoryService::track_code_cache_memory_usage();
1604   return blob;
1605 }
1606 
1607 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1608   if (size < 0) {
1609     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1610       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1611   }
1612   return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1613 WB_END
1614 
1615 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1616   if (addr == 0) {
1617     return;
1618   }
1619   BufferBlob::free((BufferBlob*) addr);
1620 WB_END
1621 
1622 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1623   ResourceMark rm;
1624   GrowableArray<CodeBlobStub*> blobs;
1625   {
1626     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1627     CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1628     if (heap == NULL) {
1629       return NULL;
1630     }
1631     for (CodeBlob* cb = (CodeBlob*) heap->first();
1632          cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1633       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1634       new (stub) CodeBlobStub(cb);
1635       blobs.append(stub);
1636     }
1637   }
1638   ThreadToNativeFromVM ttn(thread);
1639   jobjectArray result = NULL;
1640   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1641   CHECK_JNI_EXCEPTION_(env, NULL);
1642   result = env->NewObjectArray(blobs.length(), clazz, NULL);
1643   CHECK_JNI_EXCEPTION_(env, NULL);
1644   if (result == NULL) {
1645     return result;
1646   }
1647   int i = 0;
1648   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1649        it != blobs.end(); ++it) {
1650     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1651     CHECK_JNI_EXCEPTION_(env, NULL);
1652     env->SetObjectArrayElement(result, i, obj);
1653     CHECK_JNI_EXCEPTION_(env, NULL);
1654     ++i;
1655   }
1656   return result;
1657 WB_END
1658 
1659 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1660   return CompileBroker::get_compilation_activity_mode();
1661 WB_END
1662 
1663 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1664   if (addr == 0) {
1665     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1666       "WB_GetCodeBlob: addr is null");
1667   }
1668   ThreadToNativeFromVM ttn(thread);
1669   CodeBlobStub stub((CodeBlob*) addr);
1670   return codeBlob2objectArray(thread, env, &stub);
1671 WB_END
1672 
1673 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1674   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1675   CHECK_JNI_EXCEPTION_(env, 0);
1676   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1677   return (jlong) mh->method_data();
1678 WB_END
1679 
1680 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1681   return (jlong) Thread::current()->stack_size();
1682 WB_END
1683 
1684 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1685   JavaThread* t = JavaThread::current();
1686   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1687 WB_END
1688 
1689 
1690 int WhiteBox::array_bytes_to_length(size_t bytes) {
1691   return Array<u1>::bytes_to_length(bytes);
1692 }
1693 
1694 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1695   if (size < 0) {
1696     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1697         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1698   }
1699 
1700   oop class_loader_oop = JNIHandles::resolve(class_loader);
1701   ClassLoaderData* cld = class_loader_oop != NULL
1702       ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1703       : ClassLoaderData::the_null_class_loader_data();
1704 
1705   void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1706 
1707   return (jlong)(uintptr_t)metadata;
1708 WB_END
1709 
1710 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1711   oop class_loader_oop = JNIHandles::resolve(class_loader);
1712   ClassLoaderData* cld = class_loader_oop != NULL
1713       ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1714       : ClassLoaderData::the_null_class_loader_data();
1715 
1716   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1717 WB_END
1718 
1719 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1720                                 jstring version, jstring location, jobjectArray packages))
1721   Modules::define_module(module, is_open, version, location, packages, CHECK);
1722 WB_END
1723 
1724 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1725   Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1726 WB_END
1727 
1728 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1729   Modules::add_module_exports_to_all_unnamed(module, package, CHECK);
1730 WB_END
1731 
1732 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1733   Modules::add_module_exports(module, package, NULL, CHECK);
1734 WB_END
1735 
1736 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1737   Modules::add_reads_module(from_module, source_module, CHECK);
1738 WB_END
1739 
1740 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1741   if (inc < 0) {
1742     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1743         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1744   }
1745 
1746   jlong max_size_t = (jlong) ((size_t) -1);
1747   if (inc > max_size_t) {
1748     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1749         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1750   }
1751 
1752   size_t new_cap_until_GC = 0;
1753   size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1754   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1755   if (!success) {
1756     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1757                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1758                 "due to contention with another thread");
1759   }
1760   return (jlong) new_cap_until_GC;
1761 WB_END
1762 
1763 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1764   return (jlong) MetaspaceGC::capacity_until_GC();
1765 WB_END
1766 
1767 WB_ENTRY(jlong, WB_MetaspaceReserveAlignment(JNIEnv* env, jobject wb))
1768   return (jlong)Metaspace::reserve_alignment();
1769 WB_END
1770 
1771 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1772   Mutex::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1773                                            Mutex::_safepoint_check_always :
1774                                            Mutex::_safepoint_check_never;
1775   Mutex::SafepointCheckFlag sfpt_check_attempted = attemptedNoSafepointValue ?
1776                                            Mutex::_no_safepoint_check_flag :
1777                                            Mutex::_safepoint_check_flag;
1778   MutexLocker ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1779                  sfpt_check_attempted);
1780 WB_END
1781 
1782 WB_ENTRY(void, WB_AssertSpecialLock(JNIEnv* env, jobject o, jboolean allowVMBlock, jboolean safepointCheck))
1783   // Create a special lock violating condition in value
1784   Mutex::SafepointCheckRequired sfpt_check_required = safepointCheck ?
1785                                            Mutex::_safepoint_check_always :
1786                                            Mutex::_safepoint_check_never;
1787   Mutex::SafepointCheckFlag safepoint_check = safepointCheck ?
1788                                            Monitor::_safepoint_check_flag :
1789                                            Monitor::_no_safepoint_check_flag;
1790 
1791   MutexLocker ml(new Mutex(Mutex::special, "SpecialTest_lock", allowVMBlock, sfpt_check_required), safepoint_check);
1792   // If the lock above succeeds, try to safepoint to test the NSV implied with this special lock.
1793   ThreadBlockInVM tbivm(JavaThread::current());
1794 WB_END
1795 
1796 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1797   oop obj_oop = JNIHandles::resolve(obj);
1798   return (jboolean) obj_oop->mark().has_monitor();
1799 WB_END
1800 
1801 WB_ENTRY(jboolean, WB_DeflateIdleMonitors(JNIEnv* env, jobject wb))
1802   log_info(monitorinflation)("WhiteBox initiated DeflateIdleMonitors");
1803   return ObjectSynchronizer::request_deflate_idle_monitors();
1804 WB_END
1805 
1806 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1807   VM_ForceSafepoint force_safepoint_op;
1808   VMThread::execute(&force_safepoint_op);
1809 WB_END
1810 
1811 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1812   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1813   return (jlong) ik->constants();
1814 WB_END
1815 
1816 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1817   return ConstantPool::CPCACHE_INDEX_TAG;
1818 WB_END
1819 
1820 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1821   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1822   ConstantPool* cp = ik->constants();
1823   if (cp->cache() == NULL) {
1824       return -1;
1825   }
1826   return cp->cache()->length();
1827 WB_END
1828 
1829 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1830   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1831   ConstantPool* cp = ik->constants();
1832   if (cp->cache() == NULL) {
1833     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1834   }
1835   jint cpci = index;
1836   jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1837   if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1838     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1839   }
1840   jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1841   return cpi;
1842 WB_END
1843 
1844 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1845   return ConstantPool::encode_invokedynamic_index(index);
1846 WB_END
1847 
1848 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1849   VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1850   VMThread::execute(&clear_ics);
1851 WB_END
1852 
1853 template <typename T>
1854 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1855   assert(value != NULL, "sanity");
1856   if (method == NULL || name == NULL) {
1857     return false;
1858   }
1859   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1860   CHECK_JNI_EXCEPTION_(env, false);
1861   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1862   // can't be in VM when we call JNI
1863   ThreadToNativeFromVM ttnfv(thread);
1864   const char* flag_name = env->GetStringUTFChars(name, NULL);
1865   CHECK_JNI_EXCEPTION_(env, false);
1866   bool result =  CompilerOracle::has_option_value(mh, flag_name, *value);
1867   env->ReleaseStringUTFChars(name, flag_name);
1868   return result;
1869 }
1870 
1871 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1872   bool result;
1873   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1874     // can't be in VM when we call JNI
1875     ThreadToNativeFromVM ttnfv(thread);
1876     return booleanBox(thread, env, result);
1877   }
1878   return NULL;
1879 WB_END
1880 
1881 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1882   intx result;
1883   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1884     // can't be in VM when we call JNI
1885     ThreadToNativeFromVM ttnfv(thread);
1886     return longBox(thread, env, result);
1887   }
1888   return NULL;
1889 WB_END
1890 
1891 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1892   uintx result;
1893   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1894     // can't be in VM when we call JNI
1895     ThreadToNativeFromVM ttnfv(thread);
1896     return longBox(thread, env, result);
1897   }
1898   return NULL;
1899 WB_END
1900 
1901 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1902   double result;
1903   if (GetMethodOption <double> (thread, env, method, name, &result)) {
1904     // can't be in VM when we call JNI
1905     ThreadToNativeFromVM ttnfv(thread);
1906     return doubleBox(thread, env, result);
1907   }
1908   return NULL;
1909 WB_END
1910 
1911 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1912   ccstr ccstrResult;
1913   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1914     // can't be in VM when we call JNI
1915     ThreadToNativeFromVM ttnfv(thread);
1916     jstring result = env->NewStringUTF(ccstrResult);
1917     CHECK_JNI_EXCEPTION_(env, NULL);
1918     return result;
1919   }
1920   return NULL;
1921 WB_END
1922 
1923 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
1924   const char* p = Arguments::get_default_shared_archive_path();
1925   ThreadToNativeFromVM ttn(thread);
1926   jstring path_string = env->NewStringUTF(p);
1927 
1928   CHECK_JNI_EXCEPTION_(env, NULL);
1929 
1930   return path_string;
1931 WB_END
1932 
1933 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
1934   return UseSharedSpaces;
1935 WB_END
1936 
1937 WB_ENTRY(jboolean, WB_CDSMemoryMappingFailed(JNIEnv* env, jobject wb))
1938   return FileMapInfo::memory_mapping_failed();
1939 WB_END
1940 
1941 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1942   oop obj_oop = JNIHandles::resolve(obj);
1943   return HeapShared::is_archived_object(obj_oop);
1944 WB_END
1945 
1946 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1947   return (jboolean)MetaspaceShared::is_in_shared_metaspace(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1948 WB_END
1949 
1950 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1951   return !HeapShared::closed_archive_heap_region_mapped();
1952 WB_END
1953 
1954 WB_ENTRY(jobject, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass clazz))
1955   Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1956   if (k->is_instance_klass()) {
1957     InstanceKlass *ik = InstanceKlass::cast(k);
1958     ConstantPool *cp = ik->constants();
1959     objArrayOop refs =  cp->resolved_references();
1960     return (jobject)JNIHandles::make_local(env, refs);
1961   } else {
1962     return NULL;
1963   }
1964 WB_END
1965 
1966 WB_ENTRY(void, WB_LinkClass(JNIEnv* env, jobject wb, jclass clazz))
1967   Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1968   if (!k->is_instance_klass()) {
1969     return;
1970   }
1971   InstanceKlass *ik = InstanceKlass::cast(k);
1972   ik->link_class(THREAD); // may throw verification error
1973 WB_END
1974 
1975 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
1976   return HeapShared::open_archive_heap_region_mapped();
1977 WB_END
1978 
1979 WB_ENTRY(jboolean, WB_IsCDSIncludedInVmBuild(JNIEnv* env))
1980 #if INCLUDE_CDS
1981   return true;
1982 #else
1983   return false;
1984 #endif // INCLUDE_CDS
1985 WB_END
1986 
1987 WB_ENTRY(jboolean, WB_isC2OrJVMCIIncludedInVmBuild(JNIEnv* env))
1988 #if COMPILER2_OR_JVMCI
1989   return true;
1990 #else
1991   return false;
1992 #endif
1993 WB_END
1994 
1995 WB_ENTRY(jboolean, WB_IsJavaHeapArchiveSupported(JNIEnv* env))
1996   return HeapShared::is_heap_object_archiving_allowed();
1997 WB_END
1998 
1999 
2000 WB_ENTRY(jboolean, WB_IsJFRIncludedInVmBuild(JNIEnv* env))
2001 #if INCLUDE_JFR
2002   return true;
2003 #else
2004   return false;
2005 #endif // INCLUDE_JFR
2006 WB_END
2007 
2008 #if INCLUDE_CDS
2009 
2010 WB_ENTRY(jint, WB_GetOffsetForName(JNIEnv* env, jobject o, jstring name))
2011   ResourceMark rm;
2012   char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2013   int result = CDSOffsets::find_offset(c_name);
2014   return (jint)result;
2015 WB_END
2016 
2017 #endif // INCLUDE_CDS
2018 
2019 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
2020   class TraceSelfClosure : public HandshakeClosure {
2021     jint _num_threads_completed;
2022 
2023     void do_thread(Thread* th) {
2024       assert(th->is_Java_thread(), "sanity");
2025       JavaThread* jt = (JavaThread*)th;
2026       ResourceMark rm;
2027 
2028       jt->print_on(tty);
2029       jt->print_stack_on(tty);
2030       tty->cr();
2031       Atomic::inc(&_num_threads_completed);
2032     }
2033 
2034   public:
2035     TraceSelfClosure() : HandshakeClosure("WB_TraceSelf"), _num_threads_completed(0) {}
2036 
2037     jint num_threads_completed() const { return _num_threads_completed; }
2038   };
2039   TraceSelfClosure tsc;
2040 
2041   if (all_threads) {
2042     Handshake::execute(&tsc);
2043   } else {
2044     oop thread_oop = JNIHandles::resolve(thread_handle);
2045     if (thread_oop != NULL) {
2046       JavaThread* target = java_lang_Thread::thread(thread_oop);
2047       Handshake::execute(&tsc, target);
2048     }
2049   }
2050   return tsc.num_threads_completed();
2051 WB_END
2052 
2053 //Some convenience methods to deal with objects from java
2054 int WhiteBox::offset_for_field(const char* field_name, oop object,
2055     Symbol* signature_symbol) {
2056   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
2057   Thread* THREAD = Thread::current();
2058 
2059   //Get the class of our object
2060   Klass* arg_klass = object->klass();
2061   //Turn it into an instance-klass
2062   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
2063 
2064   //Create symbols to look for in the class
2065   TempNewSymbol name_symbol = SymbolTable::new_symbol(field_name);
2066 
2067   //To be filled in with an offset of the field we're looking for
2068   fieldDescriptor fd;
2069 
2070   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2071   if (res == NULL) {
2072     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2073         name_symbol->as_C_string());
2074     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2075   }
2076 
2077   //fetch the field at the offset we've found
2078   int dest_offset = fd.offset();
2079 
2080   return dest_offset;
2081 }
2082 
2083 
2084 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2085   int offset = offset_for_field(field_name, object,
2086       vmSymbols::string_signature());
2087   oop string = object->obj_field(offset);
2088   if (string == NULL) {
2089     return NULL;
2090   }
2091   const char* ret = java_lang_String::as_utf8_string(string);
2092   return ret;
2093 }
2094 
2095 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2096   int offset =
2097       offset_for_field(field_name, object, vmSymbols::bool_signature());
2098   bool ret = (object->bool_field(offset) == JNI_TRUE);
2099   return ret;
2100 }
2101 
2102 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2103   ResourceMark rm;
2104   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2105 
2106   //  one by one registration natives for exception catching
2107   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2108   CHECK_JNI_EXCEPTION(env);
2109   for (int i = 0, n = method_count; i < n; ++i) {
2110     // Skip dummy entries
2111     if (method_array[i].fnPtr == NULL) continue;
2112     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2113       jthrowable throwable_obj = env->ExceptionOccurred();
2114       if (throwable_obj != NULL) {
2115         env->ExceptionClear();
2116         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2117           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2118           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2119           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
2120               method_array[i].name, method_array[i].signature);
2121         }
2122       } else {
2123         // Registration failed unexpectedly.
2124         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
2125             method_array[i].name, method_array[i].signature);
2126         env->UnregisterNatives(wbclass);
2127         break;
2128       }
2129     }
2130   }
2131 }
2132 
2133 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2134   // can't be in VM when we call JNI
2135   ThreadToNativeFromVM ttnfv(thread);
2136   const char* dir = env->GetStringUTFChars(compDirect, NULL);
2137   CHECK_JNI_EXCEPTION_(env, 0);
2138   int ret;
2139   {
2140     ThreadInVMfromNative ttvfn(thread); // back to VM
2141     ret = DirectivesParser::parse_string(dir, tty);
2142   }
2143   env->ReleaseStringUTFChars(compDirect, dir);
2144   // -1 for error parsing directive. Return 0 as number of directives added.
2145   if (ret == -1) {
2146     ret = 0;
2147   }
2148   return (jint) ret;
2149 WB_END
2150 
2151 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2152   DirectivesStack::pop(count);
2153 WB_END
2154 
2155 // Checks that the library libfile has the noexecstack bit set.
2156 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2157   jboolean ret = false;
2158 #ifdef LINUX
2159   // Can't be in VM when we call JNI.
2160   ThreadToNativeFromVM ttnfv(thread);
2161   const char* lf = env->GetStringUTFChars(libfile, NULL);
2162   CHECK_JNI_EXCEPTION_(env, 0);
2163   ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2164   env->ReleaseStringUTFChars(libfile, lf);
2165 #endif
2166   return ret;
2167 WB_END
2168 
2169 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2170   LINUX_ONLY(return OSContainer::is_containerized();)
2171   return false;
2172 WB_END
2173 
2174 WB_ENTRY(jint, WB_ValidateCgroup(JNIEnv* env,
2175                                     jobject o,
2176                                     jstring proc_cgroups,
2177                                     jstring proc_self_cgroup,
2178                                     jstring proc_self_mountinfo))
2179   jint ret = 0;
2180 #ifdef LINUX
2181   ThreadToNativeFromVM ttnfv(thread);
2182   const char* p_cgroups = env->GetStringUTFChars(proc_cgroups, NULL);
2183   CHECK_JNI_EXCEPTION_(env, 0);
2184   const char* p_s_cgroup = env->GetStringUTFChars(proc_self_cgroup, NULL);
2185   CHECK_JNI_EXCEPTION_(env, 0);
2186   const char* p_s_mountinfo = env->GetStringUTFChars(proc_self_mountinfo, NULL);
2187   CHECK_JNI_EXCEPTION_(env, 0);
2188   u1 cg_type_flags = 0;
2189   // This sets cg_type_flags
2190   WhiteBox::validate_cgroup(p_cgroups, p_s_cgroup, p_s_mountinfo, &cg_type_flags);
2191   ret = (jint)cg_type_flags;
2192   env->ReleaseStringUTFChars(proc_cgroups, p_cgroups);
2193   env->ReleaseStringUTFChars(proc_self_cgroup, p_s_cgroup);
2194   env->ReleaseStringUTFChars(proc_self_mountinfo, p_s_mountinfo);
2195 #endif
2196   return ret;
2197 WB_END
2198 
2199 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2200   os::print_os_info(tty);
2201 WB_END
2202 
2203 // Elf decoder
2204 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2205 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2206   ElfFile::_do_not_cache_elf_section = true;
2207 #endif
2208 WB_END
2209 
2210 WB_ENTRY(jlong, WB_ResolvedMethodItemsCount(JNIEnv* env, jobject o))
2211   return (jlong) ResolvedMethodTable::items_count();
2212 WB_END
2213 
2214 WB_ENTRY(jint, WB_ProtectionDomainRemovedCount(JNIEnv* env, jobject o))
2215   return (jint) SystemDictionary::pd_cache_table()->removed_entries_count();
2216 WB_END
2217 
2218 WB_ENTRY(jint, WB_AotLibrariesCount(JNIEnv* env, jobject o))
2219   jint result = 0;
2220 #if INCLUDE_AOT
2221   result = (jint) AOTLoader::heaps_count();
2222 #endif
2223   return result;
2224 WB_END
2225 
2226 WB_ENTRY(jint, WB_GetKlassMetadataSize(JNIEnv* env, jobject wb, jclass mirror))
2227   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(mirror));
2228   // Return size in bytes.
2229   return k->size() * wordSize;
2230 WB_END
2231 
2232 // See test/hotspot/jtreg/runtime/Thread/ThreadObjAccessAtExit.java.
2233 // It explains how the thread's priority field is used for test state coordination.
2234 //
2235 WB_ENTRY(void, WB_CheckThreadObjOfTerminatingThread(JNIEnv* env, jobject wb, jobject target_handle))
2236   oop target_oop = JNIHandles::resolve_non_null(target_handle);
2237   jlong tid = java_lang_Thread::thread_id(target_oop);
2238   JavaThread* target = java_lang_Thread::thread(target_oop);
2239 
2240   // Grab a ThreadsListHandle to protect the target thread whilst terminating
2241   ThreadsListHandle tlh;
2242 
2243   // Look up the target thread by tid to ensure it is present
2244   JavaThread* t = tlh.list()->find_JavaThread_from_java_tid(tid);
2245   if (t == NULL) {
2246     THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread not found in ThreadsList!");
2247   }
2248 
2249   tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is protected");
2250   // Allow target to terminate by boosting priority
2251   java_lang_Thread::set_priority(t->threadObj(), ThreadPriority(NormPriority + 1));
2252 
2253   // Now wait for the target to terminate
2254   while (!target->is_terminated()) {
2255     ThreadBlockInVM tbivm(thread);  // just in case target is involved in a safepoint
2256     os::naked_short_sleep(0);
2257   }
2258 
2259   tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is terminated");
2260 
2261   // Now release the GC inducing thread - we have to re-resolve the external oop that
2262   // was passed in as GC may have occurred and we don't know if we can trust t->threadObj() now.
2263   oop original = JNIHandles::resolve_non_null(target_handle);
2264   java_lang_Thread::set_priority(original, ThreadPriority(NormPriority + 2));
2265 
2266   tty->print_cr("WB_CheckThreadObjOfTerminatingThread: GC has been initiated - checking threadObj:");
2267 
2268   // The Java code should be creating garbage and triggering GC, which would potentially move
2269   // the threadObj oop. If the exiting thread is properly protected then its threadObj should
2270   // remain valid and equal to our initial target_handle. Loop a few times to give GC a chance to
2271   // kick in.
2272   for (int i = 0; i < 5; i++) {
2273     oop original = JNIHandles::resolve_non_null(target_handle);
2274     oop current = t->threadObj();
2275     if (original != current) {
2276       tty->print_cr("WB_CheckThreadObjOfTerminatingThread: failed comparison on iteration %d", i);
2277       THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread oop has changed!");
2278     } else {
2279       tty->print_cr("WB_CheckThreadObjOfTerminatingThread: successful comparison on iteration %d", i);
2280       ThreadBlockInVM tbivm(thread);
2281       os::naked_short_sleep(50);
2282     }
2283   }
2284 WB_END
2285 
2286 #define CC (char*)
2287 
2288 static JNINativeMethod methods[] = {
2289   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
2290   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
2291   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
2292   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
2293   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
2294   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
2295   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
2296   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
2297   {CC"getHeapAlignment",                 CC"()J",                   (void*)&WB_GetHeapAlignment},
2298   {CC"countAliveClasses0",               CC"(Ljava/lang/String;)I", (void*)&WB_CountAliveClasses },
2299   {CC"getSymbolRefcount",                CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2300   {CC"parseCommandLine0",
2301       CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2302       (void*) &WB_ParseCommandLine
2303   },
2304   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2305                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
2306   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
2307                                                       (void*)&WB_AddToSystemClassLoaderSearch},
2308   {CC"getCompressedOopsMaxHeapSize", CC"()J",
2309       (void*)&WB_GetCompressedOopsMaxHeapSize},
2310   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
2311   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
2312   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
2313   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
2314 #if INCLUDE_CDS
2315   {CC"getOffsetForName0", CC"(Ljava/lang/String;)I",  (void*)&WB_GetOffsetForName},
2316 #endif
2317 #if INCLUDE_G1GC
2318   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
2319   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
2320   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
2321   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
2322   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
2323   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
2324   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
2325   {CC"g1StartConcMarkCycle",       CC"()Z",           (void*)&WB_G1StartMarkCycle  },
2326   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2327                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
2328   {CC"g1ActiveMemoryNodeCount", CC"()I",              (void*)&WB_G1ActiveMemoryNodeCount },
2329   {CC"g1MemoryNodeIds",    CC"()[I",                  (void*)&WB_G1MemoryNodeIds },
2330   {CC"g1GetMixedGCInfo",   CC"(I)[J",                 (void*)&WB_G1GetMixedGCInfo },
2331 #endif // INCLUDE_G1GC
2332 #if INCLUDE_G1GC || INCLUDE_PARALLELGC
2333   {CC"dramReservedStart",   CC"()J",                  (void*)&WB_DramReservedStart },
2334   {CC"dramReservedEnd",     CC"()J",                  (void*)&WB_DramReservedEnd },
2335   {CC"nvdimmReservedStart", CC"()J",                  (void*)&WB_NvdimmReservedStart },
2336   {CC"nvdimmReservedEnd",   CC"()J",                  (void*)&WB_NvdimmReservedEnd },
2337 #endif // INCLUDE_G1GC || INCLUDE_PARALLELGC
2338 #if INCLUDE_PARALLELGC
2339   {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
2340   {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
2341 #endif
2342 #if INCLUDE_NMT
2343   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
2344   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
2345   {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J",   (void*)&WB_NMTMallocWithPseudoStackAndType},
2346   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
2347   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
2348   {CC"NMTAttemptReserveMemoryAt",    CC"(JJ)J",       (void*)&WB_NMTAttemptReserveMemoryAt },
2349   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
2350   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
2351   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
2352   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
2353   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
2354   {CC"NMTNewArena",         CC"(J)J",                 (void*)&WB_NMTNewArena        },
2355   {CC"NMTFreeArena",        CC"(J)V",                 (void*)&WB_NMTFreeArena       },
2356   {CC"NMTArenaMalloc",      CC"(JJ)V",                (void*)&WB_NMTArenaMalloc     },
2357 #endif // INCLUDE_NMT
2358   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
2359   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
2360   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
2361                                                       (void*)&WB_DeoptimizeMethod  },
2362   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
2363                                                       (void*)&WB_IsMethodCompiled  },
2364   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
2365                                                       (void*)&WB_IsMethodCompilable},
2366   {CC"isMethodQueuedForCompilation0",
2367       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
2368   {CC"isIntrinsicAvailable0",
2369       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
2370                                                       (void*)&WB_IsIntrinsicAvailable},
2371   {CC"makeMethodNotCompilable0",
2372       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
2373   {CC"testSetDontInlineMethod0",
2374       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
2375   {CC"getMethodCompilationLevel0",
2376       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
2377   {CC"getMethodEntryBci0",
2378       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
2379   {CC"getCompileQueueSize",
2380       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
2381   {CC"testSetForceInlineMethod0",
2382       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
2383   {CC"enqueueMethodForCompilation0",
2384       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
2385   {CC"enqueueInitializerForCompilation0",
2386       CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
2387   {CC"markMethodProfiled",
2388       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_MarkMethodProfiled},
2389   {CC"clearMethodState0",
2390       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
2391   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
2392   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
2393   {CC"matchesMethod",
2394       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2395                                                       (void*)&WB_MatchesMethod},
2396   {CC"matchesInline",
2397       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2398                                                       (void*)&WB_MatchesInline},
2399   {CC"shouldPrintAssembly",
2400         CC"(Ljava/lang/reflect/Executable;I)Z",
2401                                                         (void*)&WB_ShouldPrintAssembly},
2402 
2403   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
2404   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
2405   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
2406   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
2407   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
2408   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
2409   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
2410   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
2411   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
2412   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
2413   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
2414                                                       (void*)&WB_SetStringVMFlag},
2415   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
2416                                                       (void*)&WB_GetBooleanVMFlag},
2417   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
2418                                                       (void*)&WB_GetIntVMFlag},
2419   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
2420                                                       (void*)&WB_GetUintVMFlag},
2421   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
2422                                                       (void*)&WB_GetIntxVMFlag},
2423   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
2424                                                       (void*)&WB_GetUintxVMFlag},
2425   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
2426                                                       (void*)&WB_GetUint64VMFlag},
2427   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
2428                                                       (void*)&WB_GetSizeTVMFlag},
2429   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
2430                                                       (void*)&WB_GetDoubleVMFlag},
2431   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
2432                                                       (void*)&WB_GetStringVMFlag},
2433   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
2434   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
2435   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
2436   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
2437   {CC"allocateMetaspace",
2438      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
2439   {CC"freeMetaspace",
2440      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
2441   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
2442   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
2443   {CC"metaspaceReserveAlignment", CC"()J",            (void*)&WB_MetaspaceReserveAlignment },
2444   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
2445   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
2446                                                       (void*)&WB_GetNMethod         },
2447   {CC"forceNMethodSweep",  CC"()V",                   (void*)&WB_ForceNMethodSweep  },
2448   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
2449   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
2450   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
2451   {CC"getCompilationActivityMode",
2452                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
2453   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
2454                                                       (void*)&WB_GetMethodData      },
2455   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
2456   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
2457   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
2458   {CC"DefineModule",       CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
2459                                                       (void*)&WB_DefineModule },
2460   {CC"AddModuleExports",   CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
2461                                                       (void*)&WB_AddModuleExports },
2462   {CC"AddReadsModule",     CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
2463                                                       (void*)&WB_AddReadsModule },
2464   {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2465                                                       (void*)&WB_AddModuleExportsToAllUnnamed },
2466   {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2467                                                       (void*)&WB_AddModuleExportsToAll },
2468   {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
2469   {CC"assertSpecialLock",  CC"(ZZ)V",                 (void*)&WB_AssertSpecialLock },
2470   {CC"deflateIdleMonitors", CC"()Z",                  (void*)&WB_DeflateIdleMonitors },
2471   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
2472   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
2473   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
2474   {CC"getConstantPoolCacheIndexTag0", CC"()I",  (void*)&WB_GetConstantPoolCacheIndexTag},
2475   {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_GetConstantPoolCacheLength},
2476   {CC"remapInstructionOperandFromCPCache0",
2477       CC"(Ljava/lang/Class;I)I",                      (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
2478   {CC"encodeConstantPoolIndyIndex0",
2479       CC"(I)I",                      (void*)&WB_ConstantPoolEncodeIndyIndex},
2480   {CC"getMethodBooleanOption",
2481       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
2482                                                       (void*)&WB_GetMethodBooleaneOption},
2483   {CC"getMethodIntxOption",
2484       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2485                                                       (void*)&WB_GetMethodIntxOption},
2486   {CC"getMethodUintxOption",
2487       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2488                                                       (void*)&WB_GetMethodUintxOption},
2489   {CC"getMethodDoubleOption",
2490       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
2491                                                       (void*)&WB_GetMethodDoubleOption},
2492   {CC"getMethodStringOption",
2493       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
2494                                                       (void*)&WB_GetMethodStringOption},
2495   {CC"getDefaultArchivePath",             CC"()Ljava/lang/String;",
2496                                                       (void*)&WB_GetDefaultArchivePath},
2497   {CC"isSharingEnabled",   CC"()Z",                   (void*)&WB_IsSharingEnabled},
2498   {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
2499   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
2500   {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
2501   {CC"getResolvedReferences", CC"(Ljava/lang/Class;)Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
2502   {CC"linkClass",          CC"(Ljava/lang/Class;)V",  (void*)&WB_LinkClass},
2503   {CC"areOpenArchiveHeapObjectsMapped",   CC"()Z",    (void*)&WB_AreOpenArchiveHeapObjectsMapped},
2504   {CC"isCDSIncludedInVmBuild",            CC"()Z",    (void*)&WB_IsCDSIncludedInVmBuild },
2505   {CC"isJFRIncludedInVmBuild",            CC"()Z",    (void*)&WB_IsJFRIncludedInVmBuild },
2506   {CC"isC2OrJVMCIIncludedInVmBuild",      CC"()Z",    (void*)&WB_isC2OrJVMCIIncludedInVmBuild },
2507   {CC"isJavaHeapArchiveSupported",        CC"()Z",    (void*)&WB_IsJavaHeapArchiveSupported },
2508   {CC"cdsMemoryMappingFailed",            CC"()Z",    (void*)&WB_CDSMemoryMappingFailed },
2509 
2510   {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
2511   {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
2512   {CC"checkThreadObjOfTerminatingThread", CC"(Ljava/lang/Thread;)V", (void*)&WB_CheckThreadObjOfTerminatingThread },
2513   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
2514                                                       (void*)&WB_AddCompilerDirective },
2515   {CC"removeCompilerDirective",   CC"(I)V",           (void*)&WB_RemoveCompilerDirective },
2516   {CC"isGCSupported",             CC"(I)Z",           (void*)&WB_IsGCSupported},
2517   {CC"isGCSelected",              CC"(I)Z",           (void*)&WB_IsGCSelected},
2518   {CC"isGCSelectedErgonomically", CC"()Z",            (void*)&WB_IsGCSelectedErgonomically},
2519   {CC"supportsConcurrentGCBreakpoints", CC"()Z",      (void*)&WB_SupportsConcurrentGCBreakpoints},
2520   {CC"concurrentGCAcquireControl0", CC"()V",          (void*)&WB_ConcurrentGCAcquireControl},
2521   {CC"concurrentGCReleaseControl0", CC"()V",          (void*)&WB_ConcurrentGCReleaseControl},
2522   {CC"concurrentGCRunToIdle0",    CC"()V",            (void*)&WB_ConcurrentGCRunToIdle},
2523   {CC"concurrentGCRunTo0",        CC"(Ljava/lang/String;)Z",
2524                                                       (void*)&WB_ConcurrentGCRunTo},
2525   {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
2526                                                       (void*)&WB_CheckLibSpecifiesNoexecstack},
2527   {CC"isContainerized",           CC"()Z",            (void*)&WB_IsContainerized },
2528   {CC"validateCgroup",
2529       CC"(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
2530                                                       (void*)&WB_ValidateCgroup },
2531   {CC"printOsInfo",               CC"()V",            (void*)&WB_PrintOsInfo },
2532   {CC"disableElfSectionCache",    CC"()V",            (void*)&WB_DisableElfSectionCache },
2533   {CC"resolvedMethodItemsCount",  CC"()J",            (void*)&WB_ResolvedMethodItemsCount },
2534   {CC"protectionDomainRemovedCount",   CC"()I",       (void*)&WB_ProtectionDomainRemovedCount },
2535   {CC"aotLibrariesCount", CC"()I",                    (void*)&WB_AotLibrariesCount },
2536   {CC"getKlassMetadataSize", CC"(Ljava/lang/Class;)I",(void*)&WB_GetKlassMetadataSize},
2537 };
2538 
2539 
2540 #undef CC
2541 
2542 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
2543   {
2544     if (WhiteBoxAPI) {
2545       // Make sure that wbclass is loaded by the null classloader
2546       InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(wbclass)));
2547       Handle loader(THREAD, ik->class_loader());
2548       if (loader.is_null()) {
2549         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
2550         WhiteBox::set_used();
2551       }
2552     }
2553   }
2554 JVM_END