1 /*
   2  * Copyright (c) 2012, 2025, 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 "cds.h"
  26 #include "cds/aotMetaspace.hpp"
  27 #include "cds/archiveHeapLoader.hpp"
  28 #include "cds/cdsConstants.hpp"
  29 #include "cds/filemap.hpp"
  30 #include "cds/heapShared.hpp"
  31 #include "classfile/classLoader.hpp"
  32 #include "classfile/classLoaderDataGraph.hpp"
  33 #include "classfile/classLoaderStats.hpp"
  34 #include "classfile/classPrinter.hpp"
  35 #include "classfile/javaClasses.inline.hpp"
  36 #include "classfile/modules.hpp"
  37 #include "classfile/stringTable.hpp"
  38 #include "classfile/symbolTable.hpp"
  39 #include "classfile/systemDictionary.hpp"
  40 #include "classfile/vmSymbols.hpp"
  41 #include "code/codeCache.hpp"
  42 #include "code/compiledIC.hpp"
  43 #include "compiler/compilationPolicy.hpp"
  44 #include "compiler/compilerOracle.hpp"
  45 #include "compiler/directivesParser.hpp"
  46 #include "compiler/methodMatcher.hpp"
  47 #include "gc/shared/concurrentGCBreakpoints.hpp"
  48 #include "gc/shared/gcConfig.hpp"
  49 #include "gc/shared/genArguments.hpp"
  50 #include "jfr/periodic/sampling/jfrCPUTimeThreadSampler.hpp"
  51 #include "jvm.h"
  52 #include "jvmtifiles/jvmtiEnv.hpp"
  53 #include "logging/log.hpp"
  54 #include "memory/iterator.hpp"
  55 #include "memory/iterator.inline.hpp"
  56 #include "memory/memoryReserver.hpp"
  57 #include "memory/metadataFactory.hpp"
  58 #include "memory/metaspace/testHelpers.hpp"
  59 #include "memory/metaspaceUtils.hpp"
  60 #include "memory/oopFactory.hpp"
  61 #include "memory/resourceArea.hpp"
  62 #include "memory/universe.hpp"
  63 #include "nmt/mallocSiteTable.hpp"
  64 #include "oops/access.hpp"
  65 #include "oops/array.hpp"
  66 #include "oops/compressedOops.hpp"
  67 #include "oops/compressedOops.inline.hpp"
  68 #include "oops/constantPool.inline.hpp"
  69 #include "oops/klass.inline.hpp"
  70 #include "oops/method.inline.hpp"
  71 #include "oops/methodData.inline.hpp"
  72 #include "oops/objArrayKlass.hpp"
  73 #include "oops/objArrayOop.inline.hpp"
  74 #include "oops/oop.inline.hpp"
  75 #include "oops/typeArrayOop.inline.hpp"
  76 #include "prims/jvmtiEnvBase.hpp"
  77 #include "prims/resolvedMethodTable.hpp"
  78 #include "prims/wbtestmethods/parserTests.hpp"
  79 #include "prims/whitebox.inline.hpp"
  80 #include "runtime/arguments.hpp"
  81 #include "runtime/atomicAccess.hpp"
  82 #include "runtime/deoptimization.hpp"
  83 #include "runtime/fieldDescriptor.inline.hpp"
  84 #include "runtime/flags/jvmFlag.hpp"
  85 #include "runtime/flags/jvmFlagAccess.hpp"
  86 #include "runtime/frame.inline.hpp"
  87 #include "runtime/handles.inline.hpp"
  88 #include "runtime/handshake.hpp"
  89 #include "runtime/interfaceSupport.inline.hpp"
  90 #include "runtime/javaCalls.hpp"
  91 #include "runtime/javaThread.inline.hpp"
  92 #include "runtime/jniHandles.inline.hpp"
  93 #include "runtime/keepStackGCProcessed.hpp"
  94 #include "runtime/lightweightSynchronizer.hpp"
  95 #include "runtime/lockStack.hpp"
  96 #include "runtime/os.hpp"
  97 #include "runtime/stackFrameStream.inline.hpp"
  98 #include "runtime/synchronizer.hpp"
  99 #include "runtime/threadSMR.hpp"
 100 #include "runtime/vframe.hpp"
 101 #include "runtime/vm_version.hpp"
 102 #include "services/memoryService.hpp"
 103 #include "utilities/align.hpp"
 104 #include "utilities/checkedCast.hpp"
 105 #include "utilities/debug.hpp"
 106 #include "utilities/elfFile.hpp"
 107 #include "utilities/exceptions.hpp"
 108 #include "utilities/macros.hpp"
 109 #include "utilities/nativeCallStack.hpp"
 110 #include "utilities/ostream.hpp"
 111 #include "utilities/vmError.hpp"
 112 #if INCLUDE_G1GC
 113 #include "gc/g1/g1Arguments.hpp"
 114 #include "gc/g1/g1CollectedHeap.inline.hpp"
 115 #include "gc/g1/g1ConcurrentMark.hpp"
 116 #include "gc/g1/g1ConcurrentMarkThread.inline.hpp"
 117 #include "gc/g1/g1HeapRegionManager.hpp"
 118 #include "gc/g1/g1HeapRegionRemSet.inline.hpp"
 119 #endif // INCLUDE_G1GC
 120 #if INCLUDE_PARALLELGC
 121 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
 122 #endif // INCLUDE_PARALLELGC
 123 #if INCLUDE_SERIALGC
 124 #include "gc/serial/serialHeap.hpp"
 125 #endif // INCLUDE_SERIALGC
 126 #if INCLUDE_ZGC
 127 #include "gc/z/zAddress.inline.hpp"
 128 #include "gc/z/zHeap.inline.hpp"
 129 #endif // INCLUDE_ZGC
 130 #if INCLUDE_JVMCI
 131 #include "jvmci/jvmciEnv.hpp"
 132 #include "jvmci/jvmciRuntime.hpp"
 133 #endif
 134 #ifdef LINUX
 135 #include "cgroupSubsystem_linux.hpp"
 136 #include "os_linux.hpp"
 137 #include "osContainer_linux.hpp"
 138 #endif
 139 
 140 #define CHECK_JNI_EXCEPTION_(env, value)                               \
 141   do {                                                                 \
 142     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
 143     THREAD->clear_pending_jni_exception_check();                       \
 144     if (HAS_PENDING_EXCEPTION) {                                       \
 145       return(value);                                                   \
 146     }                                                                  \
 147   } while (0)
 148 
 149 #define CHECK_JNI_EXCEPTION(env)                                       \
 150   do {                                                                 \
 151     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
 152     THREAD->clear_pending_jni_exception_check();                       \
 153     if (HAS_PENDING_EXCEPTION) {                                       \
 154       return;                                                          \
 155     }                                                                  \
 156   } while (0)
 157 
 158 bool WhiteBox::_used = false;
 159 volatile bool WhiteBox::compilation_locked = false;
 160 
 161 class VM_WhiteBoxOperation : public VM_Operation {
 162  public:
 163   VM_WhiteBoxOperation()                         { }
 164   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
 165   bool allow_nested_vm_operations() const        { return true; }
 166 };
 167 
 168 
 169 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
 170   return (jlong)(void*)JNIHandles::resolve(obj);
 171 WB_END
 172 
 173 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
 174   return heapOopSize;
 175 WB_END
 176 
 177 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
 178   return (jint)os::vm_page_size();
 179 WB_END
 180 
 181 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
 182   return os::vm_allocation_granularity();
 183 WB_END
 184 
 185 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
 186   return os::large_page_size();
 187 WB_END
 188 
 189 WB_ENTRY(jstring, WB_PrintString(JNIEnv* env, jobject wb, jstring str, jint max_length))
 190   ResourceMark rm(THREAD);
 191   stringStream sb;
 192   java_lang_String::print(JNIHandles::resolve(str), &sb, max_length);
 193   oop result = java_lang_String::create_oop_from_str(sb.as_string(), THREAD);
 194   return (jstring) JNIHandles::make_local(THREAD, result);
 195 WB_END
 196 
 197 WB_ENTRY(jint, WB_TakeLockAndHangInSafepoint(JNIEnv* env, jobject wb))
 198   JavaThread* self = JavaThread::current();
 199   // VMStatistic_lock is used to minimize interference with VM locking
 200   MutexLocker mu(VMStatistic_lock);
 201   VM_HangInSafepoint force_safepoint_stuck_op;
 202   VMThread::execute(&force_safepoint_stuck_op);
 203   ShouldNotReachHere();
 204   return 0;
 205 WB_END
 206 
 207 class WBIsKlassAliveClosure : public LockedClassesDo {
 208     Symbol* _name;
 209     int _count;
 210 public:
 211     WBIsKlassAliveClosure(Symbol* name) : _name(name), _count(0) {}
 212 
 213     void do_klass(Klass* k) {
 214       Symbol* ksym = k->name();
 215       if (ksym->fast_compare(_name) == 0) {
 216         _count++;
 217       } else if (k->is_instance_klass()) {
 218         // Need special handling for hidden classes because the JVM
 219         // appends "+<hex-address>" to hidden class names.
 220         InstanceKlass *ik = InstanceKlass::cast(k);
 221         if (ik->is_hidden()) {
 222           ResourceMark rm;
 223           char* k_name = ksym->as_C_string();
 224           // Find the first '+' char and truncate the string at that point.
 225           // NOTE: This will not work correctly if the original hidden class
 226           // name contains a '+'.
 227           char* plus_char = strchr(k_name, '+');
 228           if (plus_char != nullptr) {
 229             *plus_char = 0;
 230             char* c_name = _name->as_C_string();
 231             if (strcmp(c_name, k_name) == 0) {
 232               _count++;
 233             }
 234           }
 235         }
 236       }
 237     }
 238 
 239     int count() const {
 240         return _count;
 241     }
 242 };
 243 
 244 WB_ENTRY(jint, WB_CountAliveClasses(JNIEnv* env, jobject target, jstring name))
 245   oop h_name = JNIHandles::resolve(name);
 246   if (h_name == nullptr) {
 247     return 0;
 248   }
 249   Symbol* sym = java_lang_String::as_symbol(h_name);
 250   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 251 
 252   WBIsKlassAliveClosure closure(sym);
 253   ClassLoaderDataGraph::classes_do(&closure);
 254 
 255   // Return the count of alive classes with this name.
 256   return closure.count();
 257 WB_END
 258 
 259 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
 260   oop h_name = JNIHandles::resolve(name);
 261   if (h_name == nullptr) {
 262     return 0;
 263   }
 264   Symbol* sym = java_lang_String::as_symbol(h_name);
 265   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 266   return (jint)sym->refcount();
 267 WB_END
 268 
 269 
 270 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 271 #if INCLUDE_JVMTI
 272   ResourceMark rm;
 273   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 274   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 275   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 276   assert(err == JVMTI_ERROR_NONE, "must not fail");
 277 #endif
 278 }
 279 WB_END
 280 
 281 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 282 #if INCLUDE_JVMTI
 283   ResourceMark rm;
 284   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 285   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 286   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 287   assert(err == JVMTI_ERROR_NONE, "must not fail");
 288 #endif
 289 }
 290 WB_END
 291 
 292 
 293 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 294   return (jlong)Arguments::max_heap_for_compressed_oops();
 295 }
 296 WB_END
 297 
 298 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 299   tty->print_cr("Minimum heap %zu Initial heap %zu "
 300                 "Maximum heap %zu Space alignment %zu Heap alignment %zu",
 301                 MinHeapSize,
 302                 InitialHeapSize,
 303                 MaxHeapSize,
 304                 SpaceAlignment,
 305                 HeapAlignment);
 306 }
 307 WB_END
 308 
 309 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 310   size_t granularity = os::vm_allocation_granularity();
 311   ReservedHeapSpace rhs = HeapReserver::reserve(100 * granularity, granularity, os::vm_page_size(), nullptr);
 312 
 313   // Check if constraints are complied
 314   if (!( UseCompressedOops && rhs.is_reserved() &&
 315          CompressedOops::base() != nullptr &&
 316          CompressedOops::use_implicit_null_checks() )) {
 317     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 318                   "\tUseCompressedOops is %d\n"
 319                   "\trhs.base() is " PTR_FORMAT "\n"
 320                   "\tCompressedOops::base() is " PTR_FORMAT "\n"
 321                   "\tCompressedOops::use_implicit_null_checks() is %d",
 322                   UseCompressedOops,
 323                   p2i(rhs.base()),
 324                   p2i(CompressedOops::base()),
 325                   CompressedOops::use_implicit_null_checks());
 326     return;
 327   }
 328 
 329   VirtualSpace vs;
 330   vs.initialize(rhs, 50 * granularity);
 331 
 332   tty->print_cr("Reading from no access area... ");
 333   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 334                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 335 WB_END
 336 
 337 WB_ENTRY(void, WB_DecodeNKlassAndAccessKlass(JNIEnv* env, jobject o, jint nKlass))
 338   assert(UseCompressedClassPointers, "Should only call for UseCompressedClassPointers");
 339   const narrowKlass nk = (narrowKlass)nKlass;
 340   const Klass* const k = CompressedKlassPointers::decode_not_null_without_asserts(nKlass);
 341   printf("WB_DecodeNKlassAndAccessKlass: nk %u k " PTR_FORMAT "\n", nk, p2i(k));
 342   printf("Will attempt to crash now...\n");
 343   fflush(stdout); // flush now - we will crash below
 344   // Access k by calling a virtual function - will result in loading the vtable from *k
 345   k->print_on(tty);
 346 WB_END
 347 
 348 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 349                                            size_t magnitude, size_t iterations) {
 350   size_t granularity = os::vm_allocation_granularity();
 351   ReservedHeapSpace rhs = HeapReserver::reserve(reserved_space_size * granularity, granularity, os::vm_page_size(), nullptr);
 352   if (!rhs.is_reserved()) {
 353     tty->print_cr("Failed to initialize ReservedSpace. Can't proceed.");
 354     return 3;
 355   }
 356 
 357   VirtualSpace vs;
 358   if (!vs.initialize(rhs, 0)) {
 359     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 360     return 3;
 361   }
 362 
 363   int seed = os::random();
 364   tty->print_cr("Random seed is %d", seed);
 365 
 366   for (size_t i = 0; i < iterations; i++) {
 367 
 368     // Whether we will shrink or grow
 369     bool shrink = os::random() % 2L == 0;
 370 
 371     // Get random delta to resize virtual space
 372     size_t delta = (size_t)os::random() % magnitude;
 373 
 374     // If we are about to shrink virtual space below zero, then expand instead
 375     if (shrink && vs.committed_size() < delta) {
 376       shrink = false;
 377     }
 378 
 379     // Resizing by delta
 380     if (shrink) {
 381       vs.shrink_by(delta);
 382     } else {
 383       // If expanding fails expand_by will silently return false
 384       vs.expand_by(delta, true);
 385     }
 386   }
 387   return 0;
 388 }
 389 
 390 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 391         jlong reserved_space_size, jlong magnitude, jlong iterations))
 392   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 393                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 394                 iterations);
 395   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 396     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 397     return 1;
 398   }
 399 
 400   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 401   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 402   if (sizeof(size_t) < sizeof(jlong)) {
 403     jlong size_t_max_value = (jlong)SIZE_MAX;
 404     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 405         || iterations > size_t_max_value) {
 406       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 407       return 2;
 408     }
 409   }
 410 
 411   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 412                                         (size_t) magnitude, (size_t) iterations);
 413 WB_END
 414 
 415 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
 416   return GCConfig::is_gc_supported((CollectedHeap::Name)name);
 417 WB_END
 418 
 419 WB_ENTRY(jboolean, WB_HasLibgraal(JNIEnv* env, jobject o))
 420 #if INCLUDE_JVMCI
 421   return JVMCI::shared_library_exists();
 422 #endif
 423   return false;
 424 WB_END
 425 
 426 WB_ENTRY(jboolean, WB_IsGCSupportedByJVMCICompiler(JNIEnv* env, jobject o, jint name))
 427 #if INCLUDE_JVMCI
 428   if (EnableJVMCI) {
 429     // Enter the JVMCI env that will be used by the CompileBroker.
 430     JVMCIEnv jvmciEnv(thread, __FILE__, __LINE__);
 431     return jvmciEnv.init_error() == JNI_OK && jvmciEnv.runtime()->is_gc_supported(&jvmciEnv, (CollectedHeap::Name)name);
 432   }
 433 #endif
 434   return false;
 435 WB_END
 436 
 437 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
 438   return GCConfig::is_gc_selected((CollectedHeap::Name)name);
 439 WB_END
 440 
 441 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
 442   return GCConfig::is_gc_selected_ergonomically();
 443 WB_END
 444 
 445 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 446   oop p = JNIHandles::resolve(obj);
 447 #if INCLUDE_G1GC
 448   if (UseG1GC) {
 449     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 450     const G1HeapRegion* hr = g1h->heap_region_containing(p);
 451     return hr->is_old_or_humongous();
 452   }
 453 #endif
 454 #if INCLUDE_PARALLELGC
 455   if (UseParallelGC) {
 456     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 457     return !psh->is_in_young(p);
 458   }
 459 #endif
 460 #if INCLUDE_ZGC
 461   if (UseZGC) {
 462     return ZHeap::heap()->is_old(to_zaddress(p));
 463   }
 464 #endif
 465 #if INCLUDE_SHENANDOAHGC
 466   if (UseShenandoahGC) {
 467     ShenandoahHeap* sh = ShenandoahHeap::heap();
 468     return sh->mode()->is_generational() ?  sh->is_in_old(p) : sh->is_in(p);
 469   }
 470 #endif
 471 #if INCLUDE_SERIALGC
 472   if (UseSerialGC) {
 473     return !SerialHeap::heap()->is_in_young(p);
 474   }
 475 #endif
 476   ShouldNotReachHere();
 477   return false;
 478 WB_END
 479 
 480 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 481   oop p = JNIHandles::resolve(obj);
 482   return p->size() * HeapWordSize;
 483 WB_END
 484 
 485 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 486   return (jlong)SpaceAlignment;
 487 WB_END
 488 
 489 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
 490   return (jlong)HeapAlignment;
 491 WB_END
 492 
 493 WB_ENTRY(jboolean, WB_SupportsConcurrentGCBreakpoints(JNIEnv* env, jobject o))
 494   return Universe::heap()->supports_concurrent_gc_breakpoints();
 495 WB_END
 496 
 497 WB_ENTRY(void, WB_ConcurrentGCAcquireControl(JNIEnv* env, jobject o))
 498   ConcurrentGCBreakpoints::acquire_control();
 499 WB_END
 500 
 501 WB_ENTRY(void, WB_ConcurrentGCReleaseControl(JNIEnv* env, jobject o))
 502   ConcurrentGCBreakpoints::release_control();
 503 WB_END
 504 
 505 WB_ENTRY(void, WB_ConcurrentGCRunToIdle(JNIEnv* env, jobject o))
 506   ConcurrentGCBreakpoints::run_to_idle();
 507 WB_END
 508 
 509 WB_ENTRY(jboolean, WB_ConcurrentGCRunTo(JNIEnv* env, jobject o, jobject at))
 510   Handle h_name(THREAD, JNIHandles::resolve(at));
 511   ResourceMark rm;
 512   const char* c_name = java_lang_String::as_utf8_string(h_name());
 513   return ConcurrentGCBreakpoints::run_to(c_name);
 514 WB_END
 515 
 516 #if INCLUDE_G1GC
 517 
 518 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 519   if (UseG1GC) {
 520     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 521     oop result = JNIHandles::resolve(obj);
 522     const G1HeapRegion* hr = g1h->heap_region_containing(result);
 523     return hr->is_humongous();
 524   }
 525   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
 526 WB_END
 527 
 528 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 529   if (UseG1GC) {
 530     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 531     const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
 532     return hr->is_humongous();
 533   }
 534   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
 535 WB_END
 536 
 537 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 538   if (UseG1GC) {
 539     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 540     const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
 541     return hr->is_free();
 542   }
 543   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
 544 WB_END
 545 
 546 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 547   if (UseG1GC) {
 548     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 549     size_t nr = g1h->max_num_regions();
 550     return (jlong)nr;
 551   }
 552   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
 553 WB_END
 554 
 555 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 556   if (UseG1GC) {
 557     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 558     size_t nr = g1h->num_free_regions();
 559     return (jlong)nr;
 560   }
 561   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
 562 WB_END
 563 
 564 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 565   if (UseG1GC) {
 566     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 567     return g1h->concurrent_mark()->cm_thread()->in_progress();
 568   }
 569   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
 570 WB_END
 571 
 572 WB_ENTRY(jint, WB_G1CompletedConcurrentMarkCycles(JNIEnv* env, jobject o))
 573   if (UseG1GC) {
 574     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 575     G1ConcurrentMark* cm = g1h->concurrent_mark();
 576     return cm->completed_mark_cycles();
 577   }
 578   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1CompletedConcurrentMarkCycles: G1 GC is not enabled");
 579 WB_END
 580 
 581 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 582   if (UseG1GC) {
 583     return (jint)G1HeapRegion::GrainBytes;
 584   }
 585   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
 586 WB_END
 587 
 588 WB_ENTRY(jboolean, WB_G1HasRegionsToUncommit(JNIEnv* env, jobject o))
 589   if (UseG1GC) {
 590     return G1CollectedHeap::heap()->has_uncommittable_regions();
 591   }
 592   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1HasRegionsToUncommit: G1 GC is not enabled");
 593 WB_END
 594 
 595 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 596   if (UseG1GC) {
 597     ResourceMark rm(THREAD);
 598     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 599     MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 600     Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 601     return JNIHandles::make_local(THREAD, h());
 602   }
 603   THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
 604 WB_END
 605 
 606 WB_ENTRY(jint, WB_G1ActiveMemoryNodeCount(JNIEnv* env, jobject o))
 607   if (UseG1GC) {
 608     G1NUMA* numa = G1NUMA::numa();
 609     return (jint)numa->num_active_nodes();
 610   }
 611   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1ActiveMemoryNodeCount: G1 GC is not enabled");
 612 WB_END
 613 
 614 WB_ENTRY(jintArray, WB_G1MemoryNodeIds(JNIEnv* env, jobject o))
 615   if (UseG1GC) {
 616     G1NUMA* numa = G1NUMA::numa();
 617     int num_node_ids = checked_cast<int>(numa->num_active_nodes());
 618     const uint* node_ids = numa->node_ids();
 619 
 620     typeArrayOop result = oopFactory::new_intArray(num_node_ids, CHECK_NULL);
 621     for (int i = 0; i < num_node_ids; i++) {
 622       result->int_at_put(i, checked_cast<jint>(node_ids[i]));
 623     }
 624     return (jintArray) JNIHandles::make_local(THREAD, result);
 625   }
 626   THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1MemoryNodeIds: G1 GC is not enabled");
 627 WB_END
 628 
 629 class OldRegionsLivenessClosure: public G1HeapRegionClosure {
 630 
 631  private:
 632   const int _liveness;
 633   size_t _total_count;
 634   size_t _total_memory;
 635   size_t _total_memory_to_free;
 636 
 637  public:
 638   OldRegionsLivenessClosure(int liveness) :
 639     _liveness(liveness),
 640     _total_count(0),
 641     _total_memory(0),
 642     _total_memory_to_free(0) { }
 643 
 644     size_t total_count() { return _total_count; }
 645     size_t total_memory() { return _total_memory; }
 646     size_t total_memory_to_free() { return _total_memory_to_free; }
 647 
 648   bool do_heap_region(G1HeapRegion* r) {
 649     if (r->is_old()) {
 650       size_t live = r->live_bytes();
 651       size_t size = r->used();
 652       size_t reg_size = G1HeapRegion::GrainBytes;
 653       if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
 654         _total_memory += size;
 655         ++_total_count;
 656         if (size == reg_size) {
 657           // We don't include non-full regions since they are unlikely included in mixed gc
 658           // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
 659           _total_memory_to_free += size - live;
 660         }
 661       }
 662     }
 663     return false;
 664   }
 665 };
 666 
 667 
 668 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
 669   if (!UseG1GC) {
 670     THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
 671   }
 672   if (liveness < 0) {
 673     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
 674   }
 675 
 676   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 677   OldRegionsLivenessClosure rli(liveness);
 678   g1h->heap_region_iterate(&rli);
 679 
 680   typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
 681   result->long_at_put(0, rli.total_count());
 682   result->long_at_put(1, rli.total_memory());
 683   result->long_at_put(2, rli.total_memory_to_free());
 684   return (jlongArray) JNIHandles::make_local(THREAD, result);
 685 WB_END
 686 
 687 #endif // INCLUDE_G1GC
 688 
 689 // Alloc memory using the test memory tag so that we can use that to see if
 690 // NMT picks it up correctly
 691 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 692   jlong addr = 0;
 693   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 694   return addr;
 695 WB_END
 696 
 697 // Alloc memory with pseudo call stack. The test can create pseudo malloc
 698 // allocation site to stress the malloc tracking.
 699 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 700   address pc = (address)(size_t)pseudo_stack;
 701   NativeCallStack stack(&pc, 1);
 702   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 703 WB_END
 704 
 705 // Alloc memory with pseudo call stack and specific memory tag.
 706 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint mem_tag))
 707   address pc = (address)(size_t)pseudo_stack;
 708   NativeCallStack stack(&pc, 1);
 709   return (jlong)(uintptr_t)os::malloc(size, (MemTag)mem_tag, stack);
 710 WB_END
 711 
 712 // Free the memory allocated by NMTAllocTest
 713 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 714   os::free((void*)(uintptr_t)mem);
 715 WB_END
 716 
 717 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 718   return (jlong)(uintptr_t)os::reserve_memory(size, mtTest);
 719 WB_END
 720 
 721 WB_ENTRY(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
 722   return (jlong)(uintptr_t)os::attempt_reserve_memory_at((char*)(uintptr_t)addr, (size_t)size, mtTest);
 723 WB_END
 724 
 725 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 726   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 727 WB_END
 728 
 729 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 730   os::uncommit_memory((char *)(uintptr_t)addr, size);
 731 WB_END
 732 
 733 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 734   os::release_memory((char *)(uintptr_t)addr, size);
 735 WB_END
 736 
 737 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 738   int hash_size = MallocSiteTable::hash_buckets();
 739   assert(hash_size > 0, "NMT hash_size should be > 0");
 740   return (jint)hash_size;
 741 WB_END
 742 
 743 WB_ENTRY(jlong, WB_NMTNewArena(JNIEnv* env, jobject o, jlong init_size))
 744   Arena* arena =  new (mtTest) Arena(mtTest, Arena::Tag::tag_other, size_t(init_size));
 745   return (jlong)arena;
 746 WB_END
 747 
 748 WB_ENTRY(void, WB_NMTFreeArena(JNIEnv* env, jobject o, jlong arena))
 749   Arena* a = (Arena*)arena;
 750   delete a;
 751 WB_END
 752 
 753 WB_ENTRY(void, WB_NMTArenaMalloc(JNIEnv* env, jobject o, jlong arena, jlong size))
 754   Arena* a = (Arena*)arena;
 755   a->Amalloc(size_t(size));
 756 WB_END
 757 
 758 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 759   assert(method != nullptr, "method should not be null");
 760   ThreadToNativeFromVM ttn(thread);
 761   return env->FromReflectedMethod(method);
 762 }
 763 
 764 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 765 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 766  private:
 767   int _result;
 768   const bool _make_not_entrant;
 769  public:
 770   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 771         _result(0), _make_not_entrant(make_not_entrant) { }
 772   int  result() const { return _result; }
 773 
 774   void doit() {
 775     for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
 776       if (t->has_last_Java_frame()) {
 777         for (StackFrameStream fst(t, false /* update */, true /* process_frames */); !fst.is_done(); fst.next()) {
 778           frame* f = fst.current();
 779           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 780             Deoptimization::deoptimize(t, *f);
 781             if (_make_not_entrant) {
 782                 nmethod* nm = CodeCache::find_nmethod(f->pc());
 783                 assert(nm != nullptr, "did not find nmethod");
 784                 nm->make_not_entrant(nmethod::InvalidationReason::WHITEBOX_DEOPTIMIZATION);
 785             }
 786             ++_result;
 787           }
 788         }
 789       }
 790     }
 791   }
 792 };
 793 
 794 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 795   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 796   VMThread::execute(&op);
 797   return op.result();
 798 WB_END
 799 
 800 WB_ENTRY(jboolean, WB_IsFrameDeoptimized(JNIEnv* env, jobject o, jint depth))
 801   bool result = false;
 802   if (thread->has_last_Java_frame()) {
 803     ResourceMark rm(THREAD);
 804     RegisterMap reg_map(thread,
 805                         RegisterMap::UpdateMap::include,
 806                         RegisterMap::ProcessFrames::include,
 807                         RegisterMap::WalkContinuation::skip);
 808     javaVFrame *jvf = thread->last_java_vframe(&reg_map);
 809     for (jint d = 0; d < depth && jvf != nullptr; d++) {
 810       jvf = jvf->java_sender();
 811     }
 812     result = jvf != nullptr && jvf->fr().is_deoptimized_frame();
 813   }
 814   return result;
 815 WB_END
 816 
 817 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 818   DeoptimizationScope deopt_scope;
 819   CodeCache::mark_all_nmethods_for_deoptimization(&deopt_scope);
 820   deopt_scope.deoptimize_marked();
 821 WB_END
 822 
 823 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 824   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 825   int result = 0;
 826   CHECK_JNI_EXCEPTION_(env, result);
 827 
 828   DeoptimizationScope deopt_scope;
 829   {
 830     MutexLocker mu(Compile_lock);
 831     methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 832     if (is_osr) {
 833       result += mh->method_holder()->mark_osr_nmethods(&deopt_scope, mh());
 834     } else {
 835       MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
 836       if (mh->code() != nullptr) {
 837         deopt_scope.mark(mh->code());
 838         ++result;
 839       }
 840     }
 841     CodeCache::mark_for_deoptimization(&deopt_scope, mh());
 842   }
 843 
 844   deopt_scope.deoptimize_marked();
 845 
 846   return result;
 847 WB_END
 848 
 849 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 850   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 851   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 852   MutexLocker mu(Compile_lock);
 853   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 854   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 855   if (code == nullptr) {
 856     return JNI_FALSE;
 857   }
 858   return !code->is_marked_for_deoptimization();
 859 WB_END
 860 
 861 static bool is_excluded_for_compiler(AbstractCompiler* comp, methodHandle& mh) {
 862   if (comp == nullptr) {
 863     return true;
 864   }
 865   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
 866   bool exclude = directive->ExcludeOption;
 867   DirectivesStack::release(directive);
 868   return exclude;
 869 }
 870 
 871 static bool can_be_compiled_at_level(methodHandle& mh, jboolean is_osr, int level) {
 872   if (is_osr) {
 873     return CompilationPolicy::can_be_osr_compiled(mh, level);
 874   } else {
 875     return CompilationPolicy::can_be_compiled(mh, level);
 876   }
 877 }
 878 
 879 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 880   if (method == nullptr || comp_level > CompilationPolicy::highest_compile_level()) {
 881     return false;
 882   }
 883   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 884   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 885   MutexLocker mu(Compile_lock);
 886   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 887 
 888   // The ExcludeOption directive is evaluated lazily upon compilation attempt. If a method was not tried to be compiled by
 889   // a compiler, yet, the method object is not set to be not compilable by that compiler. Thus, evaluate the compiler directive
 890   // to exclude a compilation of 'method'.
 891   if (comp_level == CompLevel_any) {
 892     // Both compilers could have ExcludeOption set. Check all combinations.
 893     bool excluded_c1 = is_excluded_for_compiler(CompileBroker::compiler1(), mh);
 894     bool excluded_c2 = is_excluded_for_compiler(CompileBroker::compiler2(), mh);
 895     if (excluded_c1 && excluded_c2) {
 896       // Compilation of 'method' excluded by both compilers.
 897       return false;
 898     }
 899 
 900     if (excluded_c1) {
 901       // C1 only has ExcludeOption set: Check if compilable with C2.
 902       return can_be_compiled_at_level(mh, is_osr, CompLevel_full_optimization);
 903     } else if (excluded_c2) {
 904       // C2 only has ExcludeOption set: Check if compilable with C1.
 905       return can_be_compiled_at_level(mh, is_osr, CompLevel_simple);
 906     }
 907   } else if (comp_level > CompLevel_none && is_excluded_for_compiler(CompileBroker::compiler((int)comp_level), mh)) {
 908     // Compilation of 'method' excluded by compiler used for 'comp_level'.
 909     return false;
 910   }
 911 
 912   return can_be_compiled_at_level(mh, is_osr, (int)comp_level);
 913 WB_END
 914 
 915 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 916   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 917   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 918   MutexLocker mu(Compile_lock);
 919   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 920   return mh->queued_for_compilation();
 921 WB_END
 922 
 923 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 924   if (compLevel < CompLevel_none || compLevel > CompilationPolicy::highest_compile_level()) {
 925     return false; // Intrinsic is not available on a non-existent compilation level.
 926   }
 927   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 928   if (comp == nullptr) {
 929     // Could have compLevel == 0, or !TieredCompilation and incompatible values of TieredStopAtLevel and compLevel.
 930     tty->print_cr("WB error: no compiler for requested compilation level %d", compLevel);
 931     return false;
 932   }
 933 
 934   jmethodID method_id, compilation_context_id;
 935   method_id = reflected_method_to_jmid(thread, env, method);
 936   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 937   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 938 
 939   DirectiveSet* directive;
 940   if (compilation_context != nullptr) {
 941     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 942     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 943     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 944     directive = DirectivesStack::getMatchingDirective(cch, comp);
 945   } else {
 946     // Calling with null matches default directive
 947     directive = DirectivesStack::getDefaultDirective(comp);
 948   }
 949   bool result = comp->is_intrinsic_available(mh, directive);
 950   DirectivesStack::release(directive);
 951   return result;
 952 WB_END
 953 
 954 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 955   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 956   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 957   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 958   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 959   return (code != nullptr ? code->comp_level() : CompLevel_none);
 960 WB_END
 961 
 962 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 963   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 964   CHECK_JNI_EXCEPTION(env);
 965   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 966   if (is_osr) {
 967     mh->set_not_osr_compilable("WhiteBox", comp_level);
 968   } else {
 969     mh->set_not_compilable("WhiteBox", comp_level);
 970   }
 971 WB_END
 972 
 973 WB_ENTRY(jint, WB_GetMethodDecompileCount(JNIEnv* env, jobject o, jobject method))
 974   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 975   CHECK_JNI_EXCEPTION_(env, 0);
 976   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 977   uint cnt = 0;
 978   MethodData* mdo = mh->method_data();
 979   if (mdo != nullptr) {
 980     cnt = mdo->decompile_count();
 981   }
 982   return cnt;
 983 WB_END
 984 
 985 // Get the trap count of a method for a specific reason. If the trap count for
 986 // that reason did overflow, this includes the overflow trap count of the method.
 987 // If 'reason' is null, the sum of the traps for all reasons will be returned.
 988 // This number includes the overflow trap count if the trap count for any reason
 989 // did overflow.
 990 WB_ENTRY(jint, WB_GetMethodTrapCount(JNIEnv* env, jobject o, jobject method, jstring reason_obj))
 991   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 992   CHECK_JNI_EXCEPTION_(env, 0);
 993   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 994   uint cnt = 0;
 995   MethodData* mdo = mh->method_data();
 996   if (mdo != nullptr) {
 997     ResourceMark rm(THREAD);
 998     char* reason_str = (reason_obj == nullptr) ?
 999       nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1000     bool overflow = false;
1001     for (uint reason = 0; reason < mdo->trap_reason_limit(); reason++) {
1002       if (reason_str != nullptr && !strcmp(reason_str, Deoptimization::trap_reason_name(reason))) {
1003         cnt = mdo->trap_count(reason);
1004         // Count in the overflow trap count on overflow
1005         if (cnt == (uint)-1) {
1006           cnt = mdo->trap_count_limit() + mdo->overflow_trap_count();
1007         }
1008         break;
1009       } else if (reason_str == nullptr) {
1010         uint c = mdo->trap_count(reason);
1011         if (c == (uint)-1) {
1012           c = mdo->trap_count_limit();
1013           if (!overflow) {
1014             // Count overflow trap count just once
1015             overflow = true;
1016             c += mdo->overflow_trap_count();
1017           }
1018         }
1019         cnt += c;
1020       }
1021     }
1022   }
1023   return cnt;
1024 WB_END
1025 
1026 WB_ENTRY(jint, WB_GetDeoptCount(JNIEnv* env, jobject o, jstring reason_obj, jstring action_obj))
1027   if (reason_obj == nullptr && action_obj == nullptr) {
1028     return Deoptimization::total_deoptimization_count();
1029   }
1030   ResourceMark rm(THREAD);
1031   const char *reason_str = (reason_obj == nullptr) ?
1032     nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1033   const char *action_str = (action_obj == nullptr) ?
1034     nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(action_obj));
1035 
1036   return Deoptimization::deoptimization_count(reason_str, action_str);
1037 WB_END
1038 
1039 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
1040   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1041   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
1042   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1043   nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
1044   return (code != nullptr && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
1045 WB_END
1046 
1047 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1048   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1049   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1050   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1051   bool result = mh->dont_inline();
1052   mh->set_dont_inline(value == JNI_TRUE);
1053   return result;
1054 WB_END
1055 
1056 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
1057   if (comp_level == CompLevel_any) {
1058     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
1059         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
1060   } else {
1061     return CompileBroker::queue_size(comp_level);
1062   }
1063 WB_END
1064 
1065 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1066   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1067   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1068   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1069   bool result = mh->force_inline();
1070   mh->set_force_inline(value == JNI_TRUE);
1071   return result;
1072 WB_END
1073 
1074 #ifdef LINUX
1075 bool WhiteBox::validate_cgroup(bool cgroups_v2_enabled,
1076                                const char* controllers_file,
1077                                const char* proc_self_cgroup,
1078                                const char* proc_self_mountinfo,
1079                                u1* cg_flags) {
1080   CgroupInfo cg_infos[CG_INFO_LENGTH];
1081   return CgroupSubsystemFactory::determine_type(cg_infos, cgroups_v2_enabled, controllers_file,
1082                                                     proc_self_cgroup,
1083                                                     proc_self_mountinfo, cg_flags);
1084 }
1085 #endif
1086 
1087 bool WhiteBox::is_asan_enabled() {
1088 #ifdef ADDRESS_SANITIZER
1089   return true;
1090 #else
1091   return false;
1092 #endif
1093 }
1094 
1095 bool WhiteBox::is_ubsan_enabled() {
1096 #ifdef UNDEFINED_BEHAVIOR_SANITIZER
1097   return true;
1098 #else
1099   return false;
1100 #endif
1101 }
1102 
1103 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, JavaThread* THREAD) {
1104   // Screen for unavailable/bad comp level or null method
1105   AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1106   if (method == nullptr) {
1107     tty->print_cr("WB error: request to compile null method");
1108     return false;
1109   }
1110   if (method->is_abstract()) {
1111     tty->print_cr("WB error: request to compile abstract method");
1112     return false;
1113   }
1114   if (comp_level > CompilationPolicy::highest_compile_level()) {
1115     tty->print_cr("WB error: invalid compilation level %d", comp_level);
1116     return false;
1117   }
1118   if (comp == nullptr) {
1119     tty->print_cr("WB error: no compiler for requested compilation level %d", comp_level);
1120     return false;
1121   }
1122 
1123   // Check if compilation is blocking
1124   methodHandle mh(THREAD, method);
1125   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
1126   bool is_blocking = !directive->BackgroundCompilationOption;
1127   DirectivesStack::release(directive);
1128 
1129   // Compile method and check result
1130   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh->invocation_count(), CompileTask::Reason_Whitebox, CHECK_false);
1131   MutexLocker mu(THREAD, Compile_lock);
1132   bool is_queued = mh->queued_for_compilation();
1133   if ((!is_blocking && is_queued) || nm != nullptr) {
1134     return true;
1135   }
1136   // Check code again because compilation may be finished before Compile_lock is acquired.
1137   if (bci == InvocationEntryBci) {
1138     nmethod* code = mh->code();
1139     if (code != nullptr) {
1140       return true;
1141     }
1142   } else if (mh->lookup_osr_nmethod_for(bci, comp_level, false) != nullptr) {
1143     return true;
1144   }
1145   tty->print("WB error: failed to %s compile at level %d method ", is_blocking ? "blocking" : "", comp_level);
1146   mh->print_short_name(tty);
1147   tty->cr();
1148   if (is_blocking && is_queued) {
1149     tty->print_cr("WB error: blocking compilation is still in queue!");
1150   }
1151   return false;
1152 }
1153 
1154 size_t WhiteBox::get_in_use_monitor_count() {
1155   return ObjectSynchronizer::_in_use_list.count();
1156 }
1157 
1158 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1159   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1160   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1161   return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1162 WB_END
1163 
1164 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1165   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1166   Method* clinit = ik->class_initializer();
1167   if (clinit == nullptr || clinit->method_holder()->is_not_initialized()) {
1168     return false;
1169   }
1170   return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1171 WB_END
1172 
1173 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1174   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1175   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1176 
1177   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1178   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
1179   bool result = directive->PrintAssemblyOption;
1180   DirectivesStack::release(directive);
1181 
1182   return result;
1183 WB_END
1184 
1185 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1186   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1187   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1188 
1189   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1190 
1191   ResourceMark rm(THREAD);
1192   const char* error_msg = nullptr;
1193   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1194   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1195 
1196   if (m == nullptr) {
1197     assert(error_msg != nullptr, "Always have an error message");
1198     tty->print_cr("Got error: %s", error_msg);
1199     return -1; // Pattern failed
1200   }
1201 
1202   // Pattern works - now check if it matches
1203   int result;
1204   if (m->match(mh, InlineMatcher::force_inline)) {
1205     result = 2; // Force inline match
1206   } else if (m->match(mh, InlineMatcher::dont_inline)) {
1207     result = 1; // Dont inline match
1208   } else {
1209     result = 0; // No match
1210   }
1211   delete m;
1212   return result;
1213 WB_END
1214 
1215 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1216   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1217   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1218 
1219   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1220 
1221   ResourceMark rm;
1222   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1223 
1224   const char* error_msg = nullptr;
1225 
1226   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg, false);
1227   if (m == nullptr) {
1228     assert(error_msg != nullptr, "Must have error_msg");
1229     tty->print_cr("Got error: %s", error_msg);
1230     return -1;
1231   }
1232 
1233   // Pattern works - now check if it matches
1234   int result = m->matches(mh);
1235   delete m;
1236   assert(result == 0 || result == 1, "Result out of range");
1237   return result;
1238 WB_END
1239 
1240 WB_ENTRY(void, WB_MarkMethodProfiled(JNIEnv* env, jobject o, jobject method))
1241   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1242   CHECK_JNI_EXCEPTION(env);
1243   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1244 
1245   MethodData* mdo = mh->method_data();
1246   if (mdo == nullptr) {
1247     Method::build_profiling_method_data(mh, CHECK_AND_CLEAR);
1248     mdo = mh->method_data();
1249   }
1250   mdo->init();
1251   InvocationCounter* icnt = mdo->invocation_counter();
1252   InvocationCounter* bcnt = mdo->backedge_counter();
1253   // set i-counter according to CompilationPolicy::is_method_profiled
1254   icnt->set(Tier4MinInvocationThreshold);
1255   bcnt->set(Tier4CompileThreshold);
1256 WB_END
1257 
1258 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1259   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1260   CHECK_JNI_EXCEPTION(env);
1261   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1262   MutexLocker mu(THREAD, Compile_lock);
1263   MethodData* mdo = mh->method_data();
1264   MethodCounters* mcs = mh->method_counters();
1265 
1266   if (mdo != nullptr) {
1267     mdo->init();
1268     ResourceMark rm(THREAD);
1269     int arg_count = mdo->method()->size_of_parameters();
1270     for (int i = 0; i < arg_count; i++) {
1271       mdo->set_arg_modified(i, 0);
1272     }
1273     mdo->clean_method_data(/*always_clean*/true);
1274   }
1275 
1276   mh->clear_is_not_c1_compilable();
1277   mh->clear_is_not_c2_compilable();
1278   mh->clear_is_not_c2_osr_compilable();
1279   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1280   if (mcs != nullptr) {
1281     mcs->clear_counters();
1282   }
1283 WB_END
1284 
1285 template <typename T, int type_enum>
1286 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1287   if (name == nullptr) {
1288     return false;
1289   }
1290   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1291   const char* flag_name = env->GetStringUTFChars(name, nullptr);
1292   CHECK_JNI_EXCEPTION_(env, false);
1293   const JVMFlag* flag = JVMFlag::find_declared_flag(flag_name);
1294   JVMFlag::Error result = JVMFlagAccess::get<T, type_enum>(flag, value);
1295   env->ReleaseStringUTFChars(name, flag_name);
1296   return (result == JVMFlag::SUCCESS);
1297 }
1298 
1299 template <typename T, int type_enum>
1300 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1301   if (name == nullptr) {
1302     return false;
1303   }
1304   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1305   const char* flag_name = env->GetStringUTFChars(name, nullptr);
1306   CHECK_JNI_EXCEPTION_(env, false);
1307   JVMFlag* flag = JVMFlag::find_flag(flag_name);
1308   JVMFlag::Error result = JVMFlagAccess::set<T, type_enum>(flag, value, JVMFlagOrigin::INTERNAL);
1309   env->ReleaseStringUTFChars(name, flag_name);
1310   return (result == JVMFlag::SUCCESS);
1311 }
1312 
1313 template <typename T>
1314 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1315   ResourceMark rm(thread);
1316   jclass clazz = env->FindClass(name->as_C_string());
1317   CHECK_JNI_EXCEPTION_(env, nullptr);
1318   jmethodID methodID = env->GetStaticMethodID(clazz,
1319         vmSymbols::valueOf_name()->as_C_string(),
1320         sig->as_C_string());
1321   CHECK_JNI_EXCEPTION_(env, nullptr);
1322   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1323   CHECK_JNI_EXCEPTION_(env, nullptr);
1324   return result;
1325 }
1326 
1327 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1328   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1329 }
1330 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1331   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1332 }
1333 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1334   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1335 }
1336 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1337   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1338 }*/
1339 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1340   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1341 }
1342 
1343 static const JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1344   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1345   const char* flag_name = env->GetStringUTFChars(name, nullptr);
1346   CHECK_JNI_EXCEPTION_(env, nullptr);
1347   const JVMFlag* result = JVMFlag::find_declared_flag(flag_name);
1348   env->ReleaseStringUTFChars(name, flag_name);
1349   return result;
1350 }
1351 
1352 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1353   const JVMFlag* flag = getVMFlag(thread, env, name);
1354   return (flag != nullptr) && flag->is_constant_in_binary();
1355 WB_END
1356 
1357 WB_ENTRY(jboolean, WB_IsDefaultVMFlag(JNIEnv* env, jobject o, jstring name))
1358   const JVMFlag* flag = getVMFlag(thread, env, name);
1359   return (flag != nullptr) && flag->is_default();
1360 WB_END
1361 
1362 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1363   const JVMFlag* flag = getVMFlag(thread, env, name);
1364   return (flag != nullptr) && !(flag->is_unlocked() || flag->is_unlocker());
1365 WB_END
1366 
1367 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1368   bool result;
1369   if (GetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result)) {
1370     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1371     return booleanBox(thread, env, result);
1372   }
1373   return nullptr;
1374 WB_END
1375 
1376 template <typename T, int type_enum>
1377 jobject GetVMFlag_longBox(JNIEnv* env, JavaThread* thread, jstring name) {
1378   T result;
1379   if (GetVMFlag <T, type_enum> (thread, env, name, &result)) {
1380     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1381     return longBox(thread, env, result);
1382   }
1383   return nullptr;
1384 }
1385 
1386 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1387   return GetVMFlag_longBox<JVM_FLAG_TYPE(int)>(env, thread, name);
1388 WB_END
1389 
1390 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1391   return GetVMFlag_longBox<JVM_FLAG_TYPE(uint)>(env, thread, name);
1392 WB_END
1393 
1394 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1395   return GetVMFlag_longBox<JVM_FLAG_TYPE(intx)>(env, thread, name);
1396 WB_END
1397 
1398 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1399   return GetVMFlag_longBox<JVM_FLAG_TYPE(uintx)>(env, thread, name);
1400 WB_END
1401 
1402 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1403   return GetVMFlag_longBox<JVM_FLAG_TYPE(uint64_t)>(env, thread, name);
1404 WB_END
1405 
1406 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1407   return GetVMFlag_longBox<JVM_FLAG_TYPE(size_t)>(env, thread, name);
1408 WB_END
1409 
1410 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1411   double result;
1412   if (GetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result)) {
1413     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1414     return doubleBox(thread, env, result);
1415   }
1416   return nullptr;
1417 WB_END
1418 
1419 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1420   ccstr ccstrResult;
1421   if (GetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &ccstrResult)) {
1422     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1423     jstring result = env->NewStringUTF(ccstrResult);
1424     CHECK_JNI_EXCEPTION_(env, nullptr);
1425     return result;
1426   }
1427   return nullptr;
1428 WB_END
1429 
1430 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1431   bool result = value == JNI_TRUE ? true : false;
1432   SetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result);
1433 WB_END
1434 
1435 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1436   int result = checked_cast<int>(value);
1437   SetVMFlag <JVM_FLAG_TYPE(int)> (thread, env, name, &result);
1438 WB_END
1439 
1440 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1441   uint result = checked_cast<uint>(value);
1442   SetVMFlag <JVM_FLAG_TYPE(uint)> (thread, env, name, &result);
1443 WB_END
1444 
1445 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1446   intx result = value;
1447   SetVMFlag <JVM_FLAG_TYPE(intx)> (thread, env, name, &result);
1448 WB_END
1449 
1450 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1451   uintx result = value;
1452   SetVMFlag <JVM_FLAG_TYPE(uintx)> (thread, env, name, &result);
1453 WB_END
1454 
1455 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1456   uint64_t result = value;
1457   SetVMFlag <JVM_FLAG_TYPE(uint64_t)> (thread, env, name, &result);
1458 WB_END
1459 
1460 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1461   size_t result = value;
1462   SetVMFlag <JVM_FLAG_TYPE(size_t)> (thread, env, name, &result);
1463 WB_END
1464 
1465 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1466   double result = value;
1467   SetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result);
1468 WB_END
1469 
1470 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1471   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1472   const char* ccstrValue;
1473   if (value == nullptr) {
1474     ccstrValue = nullptr;
1475   }
1476   else {
1477     ccstrValue = env->GetStringUTFChars(value, nullptr);
1478     CHECK_JNI_EXCEPTION(env);
1479   }
1480   {
1481     ccstr param = ccstrValue;
1482     ThreadInVMfromNative ttvfn(thread); // back to VM
1483     if (SetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &param)) {
1484       assert(param == nullptr, "old value is freed automatically and not returned");
1485     }
1486   }
1487   if (value != nullptr) {
1488     env->ReleaseStringUTFChars(value, ccstrValue);
1489   }
1490 WB_END
1491 
1492 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1493   WhiteBox::compilation_locked = true;
1494 WB_END
1495 
1496 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1497   MonitorLocker mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1498   WhiteBox::compilation_locked = false;
1499   mo.notify_all();
1500 WB_END
1501 
1502 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1503   ResourceMark rm(THREAD);
1504   int len;
1505   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1506   return (StringTable::lookup(name, len) != nullptr);
1507 WB_END
1508 
1509 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1510   Universe::heap()->collect(GCCause::_wb_full_gc);
1511 WB_END
1512 
1513 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1514   Universe::heap()->collect(GCCause::_wb_young_gc);
1515 WB_END
1516 
1517 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1518   // static+volatile in order to force the read to happen
1519   // (not be eliminated by the compiler)
1520   static char c;
1521   static volatile char* p;
1522 
1523   p = os::reserve_memory(os::vm_allocation_granularity(), mtTest);
1524   if (p == nullptr) {
1525     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1526   }
1527 
1528   c = *p;
1529 WB_END
1530 
1531 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1532   const char* features = VM_Version::cpu_info_string();
1533   ThreadToNativeFromVM ttn(thread);
1534   jstring features_string = env->NewStringUTF(features);
1535 
1536   CHECK_JNI_EXCEPTION_(env, nullptr);
1537 
1538   return features_string;
1539 WB_END
1540 
1541 CodeBlobType WhiteBox::get_blob_type(const CodeBlob* code) {
1542   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1543   return CodeCache::get_code_heap(code)->code_blob_type();
1544 }
1545 
1546 CodeHeap* WhiteBox::get_code_heap(CodeBlobType blob_type) {
1547   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1548   return CodeCache::get_code_heap(blob_type);
1549 }
1550 
1551 struct CodeBlobStub {
1552   CodeBlobStub(const CodeBlob* blob) :
1553       name(os::strdup(blob->name())),
1554       size(blob->size()),
1555       blob_type(static_cast<jint>(WhiteBox::get_blob_type(blob))),
1556       address((jlong) blob),
1557       code_begin((jlong) blob->code_begin()),
1558       is_nmethod((jboolean) blob->is_nmethod()) { }
1559   ~CodeBlobStub() { os::free((void*) name); }
1560   const char* const name;
1561   const jint        size;
1562   const jint        blob_type;
1563   const jlong       address;
1564   const jlong       code_begin;
1565   const jboolean    is_nmethod;
1566 };
1567 
1568 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1569   ResourceMark rm;
1570   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1571   CHECK_JNI_EXCEPTION_(env, nullptr);
1572   jobjectArray result = env->NewObjectArray(6, clazz, nullptr);
1573 
1574   jstring name = env->NewStringUTF(cb->name);
1575   CHECK_JNI_EXCEPTION_(env, nullptr);
1576   env->SetObjectArrayElement(result, 0, name);
1577 
1578   jobject obj = integerBox(thread, env, cb->size);
1579   CHECK_JNI_EXCEPTION_(env, nullptr);
1580   env->SetObjectArrayElement(result, 1, obj);
1581 
1582   obj = integerBox(thread, env, cb->blob_type);
1583   CHECK_JNI_EXCEPTION_(env, nullptr);
1584   env->SetObjectArrayElement(result, 2, obj);
1585 
1586   obj = longBox(thread, env, cb->address);
1587   CHECK_JNI_EXCEPTION_(env, nullptr);
1588   env->SetObjectArrayElement(result, 3, obj);
1589 
1590   obj = longBox(thread, env, cb->code_begin);
1591   CHECK_JNI_EXCEPTION_(env, nullptr);
1592   env->SetObjectArrayElement(result, 4, obj);
1593 
1594   obj = booleanBox(thread, env, cb->is_nmethod);
1595   CHECK_JNI_EXCEPTION_(env, nullptr);
1596   env->SetObjectArrayElement(result, 5, obj);
1597 
1598   return result;
1599 }
1600 
1601 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1602   ResourceMark rm(THREAD);
1603   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1604   CHECK_JNI_EXCEPTION_(env, nullptr);
1605   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1606   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1607   jobjectArray result = nullptr;
1608   if (code == nullptr) {
1609     return result;
1610   }
1611   int comp_level = code->comp_level();
1612   int insts_size = code->insts_size();
1613 
1614   ThreadToNativeFromVM ttn(thread);
1615   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1616   CHECK_JNI_EXCEPTION_(env, nullptr);
1617   result = env->NewObjectArray(5, clazz, nullptr);
1618   if (result == nullptr) {
1619     return result;
1620   }
1621 
1622   CodeBlobStub stub(code);
1623   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1624   CHECK_JNI_EXCEPTION_(env, nullptr);
1625   env->SetObjectArrayElement(result, 0, codeBlob);
1626 
1627   jobject level = integerBox(thread, env, comp_level);
1628   CHECK_JNI_EXCEPTION_(env, nullptr);
1629   env->SetObjectArrayElement(result, 1, level);
1630 
1631   jbyteArray insts = env->NewByteArray(insts_size);
1632   CHECK_JNI_EXCEPTION_(env, nullptr);
1633   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1634   env->SetObjectArrayElement(result, 2, insts);
1635 
1636   jobject id = integerBox(thread, env, code->compile_id());
1637   CHECK_JNI_EXCEPTION_(env, nullptr);
1638   env->SetObjectArrayElement(result, 3, id);
1639 
1640   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1641   CHECK_JNI_EXCEPTION_(env, nullptr);
1642   env->SetObjectArrayElement(result, 4, entry_point);
1643 
1644   return result;
1645 WB_END
1646 
1647 WB_ENTRY(void, WB_RelocateNMethodFromMethod(JNIEnv* env, jobject o, jobject method, jint blob_type))
1648   ResourceMark rm(THREAD);
1649   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1650   CHECK_JNI_EXCEPTION(env);
1651   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1652   nmethod* code = mh->code();
1653   if (code != nullptr) {
1654     MutexLocker ml_Compile_lock(Compile_lock);
1655     CompiledICLocker ic_locker(code);
1656     MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1657     code->relocate(static_cast<CodeBlobType>(blob_type));
1658   }
1659 WB_END
1660 
1661 WB_ENTRY(void, WB_RelocateNMethodFromAddr(JNIEnv* env, jobject o, jlong addr, jint blob_type))
1662   ResourceMark rm(THREAD);
1663   CHECK_JNI_EXCEPTION(env);
1664   void* address = (void*) addr;
1665 
1666   if (address == nullptr) {
1667     return;
1668   }
1669 
1670   MutexLocker ml_Compile_lock(Compile_lock);
1671   MutexLocker ml_CompiledIC_lock(CompiledIC_lock, Mutex::_no_safepoint_check_flag);
1672   MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1673 
1674   // Verify that nmethod address is still valid
1675   CodeBlob* blob = CodeCache::find_blob(address);
1676   if (blob != nullptr && blob->is_nmethod()) {
1677     nmethod* code = blob->as_nmethod();
1678     if (code->is_in_use()) {
1679       CompiledICLocker ic_locker(code);
1680       code->relocate(static_cast<CodeBlobType>(blob_type));
1681     }
1682   }
1683 WB_END
1684 
1685 CodeBlob* WhiteBox::allocate_code_blob(int size, CodeBlobType blob_type) {
1686   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1687   BufferBlob* blob;
1688   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1689   if (full_size < size) {
1690     full_size += align_up(size - full_size, oopSize);
1691   }
1692   {
1693     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1694     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1695     if (blob != nullptr) {
1696       ::new (blob) BufferBlob("WB::DummyBlob", CodeBlobKind::Buffer, full_size);
1697     }
1698   }
1699   // Track memory usage statistic after releasing CodeCache_lock
1700   MemoryService::track_code_cache_memory_usage();
1701   return blob;
1702 }
1703 
1704 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1705   if (size < 0) {
1706     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1707       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1708   }
1709   return (jlong) WhiteBox::allocate_code_blob(size, static_cast<CodeBlobType>(blob_type));
1710 WB_END
1711 
1712 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1713   if (addr == 0) {
1714     return;
1715   }
1716   BufferBlob::free((BufferBlob*) addr);
1717 WB_END
1718 
1719 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1720   ResourceMark rm;
1721   GrowableArray<CodeBlobStub*> blobs;
1722   {
1723     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1724     CodeHeap* heap = WhiteBox::get_code_heap(static_cast<CodeBlobType>(blob_type));
1725     if (heap == nullptr) {
1726       return nullptr;
1727     }
1728     for (CodeBlob* cb = (CodeBlob*) heap->first();
1729          cb != nullptr; cb = (CodeBlob*) heap->next(cb)) {
1730       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1731       new (stub) CodeBlobStub(cb);
1732       blobs.append(stub);
1733     }
1734   }
1735   ThreadToNativeFromVM ttn(thread);
1736   jobjectArray result = nullptr;
1737   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1738   CHECK_JNI_EXCEPTION_(env, nullptr);
1739   result = env->NewObjectArray(blobs.length(), clazz, nullptr);
1740   CHECK_JNI_EXCEPTION_(env, nullptr);
1741   if (result == nullptr) {
1742     return result;
1743   }
1744   int i = 0;
1745   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1746        it != blobs.end(); ++it) {
1747     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1748     CHECK_JNI_EXCEPTION_(env, nullptr);
1749     env->SetObjectArrayElement(result, i, obj);
1750     CHECK_JNI_EXCEPTION_(env, nullptr);
1751     ++i;
1752   }
1753   return result;
1754 WB_END
1755 
1756 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1757   return CompileBroker::get_compilation_activity_mode();
1758 WB_END
1759 
1760 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1761   if (addr == 0) {
1762     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1763       "WB_GetCodeBlob: addr is null");
1764   }
1765   ThreadToNativeFromVM ttn(thread);
1766   CodeBlobStub stub((CodeBlob*) addr);
1767   return codeBlob2objectArray(thread, env, &stub);
1768 WB_END
1769 
1770 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1771   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1772   CHECK_JNI_EXCEPTION_(env, 0);
1773   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1774   return (jlong) mh->method_data();
1775 WB_END
1776 
1777 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1778   return (jlong) thread->stack_size();
1779 WB_END
1780 
1781 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1782   return (jlong) thread->stack_overflow_state()->stack_available(
1783                    os::current_stack_pointer()) - (jlong)StackOverflow::stack_shadow_zone_size();
1784 WB_END
1785 
1786 
1787 int WhiteBox::array_bytes_to_length(size_t bytes) {
1788   return Array<u1>::bytes_to_length(bytes);
1789 }
1790 
1791 ///////////////
1792 // MetaspaceTestContext and MetaspaceTestArena
1793 WB_ENTRY(jlong, WB_CreateMetaspaceTestContext(JNIEnv* env, jobject wb, jlong commit_limit, jlong reserve_limit))
1794   assert(is_aligned(commit_limit, BytesPerWord),
1795          "WB_CreateMetaspaceTestContext: commit_limit is not a multiple of the system word byte size");
1796   assert(is_aligned(reserve_limit, BytesPerWord),
1797          "WB_CreateMetaspaceTestContext: reserve_limit is not a multiple of the system word byte size");
1798   metaspace::MetaspaceTestContext* context =
1799       new metaspace::MetaspaceTestContext("whitebox-metaspace-context", (size_t) commit_limit / BytesPerWord,
1800                                           (size_t) reserve_limit / BytesPerWord);
1801   return (jlong)p2i(context);
1802 WB_END
1803 
1804 WB_ENTRY(void, WB_DestroyMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1805   delete (metaspace::MetaspaceTestContext*) context;
1806 WB_END
1807 
1808 WB_ENTRY(void, WB_PurgeMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1809   metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1810   context0->purge_area();
1811 WB_END
1812 
1813 WB_ENTRY(void, WB_PrintMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1814   metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1815   context0->print_on(tty);
1816 WB_END
1817 
1818 WB_ENTRY(jlong, WB_GetTotalCommittedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1819   metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1820   return (jlong)context0->committed_words() * BytesPerWord;
1821 WB_END
1822 
1823 WB_ENTRY(jlong, WB_GetTotalUsedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1824   metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1825   return (jlong)context0->used_words() * BytesPerWord;
1826 WB_END
1827 
1828 WB_ENTRY(jlong, WB_CreateArenaInTestContext(JNIEnv* env, jobject wb, jlong context, jboolean is_micro))
1829   const Metaspace::MetaspaceType type = is_micro ? Metaspace::ClassMirrorHolderMetaspaceType : Metaspace::StandardMetaspaceType;
1830   metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1831   return (jlong)p2i(context0->create_arena(type));
1832 WB_END
1833 
1834 WB_ENTRY(void, WB_DestroyMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena))
1835   delete (metaspace::MetaspaceTestArena*) arena;
1836 WB_END
1837 
1838 WB_ENTRY(jlong, WB_AllocateFromMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong size))
1839   assert(is_aligned(size, BytesPerWord),
1840          "WB_AllocateFromMetaspaceTestArena: size is not a multiple of the system word byte size");
1841   metaspace::MetaspaceTestArena *arena0 = (metaspace::MetaspaceTestArena *)arena;
1842   MetaWord *p = arena0->allocate((size_t) size / BytesPerWord);
1843   return (jlong)p2i(p);
1844 WB_END
1845 
1846 WB_ENTRY(void, WB_DeallocateToMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong p, jlong size))
1847   assert(is_aligned(size, BytesPerWord),
1848          "WB_DeallocateToMetaspaceTestArena: size is not a multiple of the system word byte size");
1849   metaspace::MetaspaceTestArena* arena0 = (metaspace::MetaspaceTestArena*) arena;
1850   arena0->deallocate((MetaWord*)p, (size_t) size / BytesPerWord);
1851 WB_END
1852 
1853 WB_ENTRY(jlong, WB_GetMaxMetaspaceAllocationSize(JNIEnv* env, jobject wb))
1854   return (jlong) Metaspace::max_allocation_word_size() * BytesPerWord;
1855 WB_END
1856 
1857 WB_ENTRY(jlong, WB_WordSize(JNIEnv* env))
1858   return (jlong)BytesPerWord;
1859 WB_END
1860 
1861 WB_ENTRY(jlong, WB_RootChunkWordSize(JNIEnv* env))
1862   return (jlong)Metaspace::reserve_alignment_words();
1863 WB_END
1864 
1865 WB_ENTRY(jboolean, WB_IsStaticallyLinked(JNIEnv* env, jobject wb))
1866   return JVM_IsStaticallyLinked();
1867 WB_END
1868 
1869 //////////////
1870 
1871 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1872   if (size < 0) {
1873     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1874         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1875   }
1876 
1877   oop class_loader_oop = JNIHandles::resolve(class_loader);
1878   ClassLoaderData* cld = class_loader_oop != nullptr
1879       ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1880       : ClassLoaderData::the_null_class_loader_data();
1881 
1882   void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1883 
1884   return (jlong)(uintptr_t)metadata;
1885 WB_END
1886 
1887 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1888                                 jstring version, jstring location, jobjectArray packages))
1889   Handle h_module (THREAD, JNIHandles::resolve(module));
1890   Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1891 WB_END
1892 
1893 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1894   Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1895   Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1896   Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1897 WB_END
1898 
1899 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1900   Handle h_module (THREAD, JNIHandles::resolve(module));
1901   Modules::add_module_exports_to_all_unnamed(h_module, package, CHECK);
1902 WB_END
1903 
1904 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1905   Handle h_module (THREAD, JNIHandles::resolve(module));
1906   Modules::add_module_exports(h_module, package, Handle(), CHECK);
1907 WB_END
1908 
1909 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1910   Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1911   Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1912   Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1913 WB_END
1914 
1915 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1916   if (inc < 0) {
1917     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1918         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1919   }
1920 
1921   jlong max_size_t = (jlong) ((size_t) -1);
1922   if (inc > max_size_t) {
1923     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1924         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1925   }
1926 
1927   size_t new_cap_until_GC = 0;
1928   size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1929   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1930   if (!success) {
1931     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1932                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1933                 "due to contention with another thread");
1934   }
1935   return (jlong) new_cap_until_GC;
1936 WB_END
1937 
1938 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1939   return (jlong) MetaspaceGC::capacity_until_GC();
1940 WB_END
1941 
1942 // The function is only valid when CDS is available.
1943 WB_ENTRY(jlong, WB_AOTMetaspaceRegionAlignment(JNIEnv* env, jobject wb))
1944 #if INCLUDE_CDS
1945   return (jlong)AOTMetaspace::core_region_alignment();
1946 #else
1947   ShouldNotReachHere();
1948   return 0L;
1949 #endif
1950 WB_END
1951 
1952 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1953   oop obj_oop = JNIHandles::resolve(obj);
1954   return (jboolean) obj_oop->mark().has_monitor();
1955 WB_END
1956 
1957 WB_ENTRY(jboolean, WB_IsAsanEnabled(JNIEnv* env))
1958   return (jboolean) WhiteBox::is_asan_enabled();
1959 WB_END
1960 
1961 WB_ENTRY(jboolean, WB_IsUbsanEnabled(JNIEnv* env))
1962   return (jboolean) WhiteBox::is_ubsan_enabled();
1963 WB_END
1964 
1965 WB_ENTRY(jlong, WB_getInUseMonitorCount(JNIEnv* env, jobject wb))
1966   return (jlong) WhiteBox::get_in_use_monitor_count();
1967 WB_END
1968 
1969 WB_ENTRY(jint, WB_getLockStackCapacity(JNIEnv* env))
1970   return (jint) LockStack::CAPACITY;
1971 WB_END
1972 
1973 WB_ENTRY(jboolean, WB_supportsRecursiveLightweightLocking(JNIEnv* env))
1974   return (jboolean) VM_Version::supports_recursive_lightweight_locking();
1975 WB_END
1976 
1977 WB_ENTRY(jboolean, WB_DeflateIdleMonitors(JNIEnv* env, jobject wb))
1978   log_info(monitorinflation)("WhiteBox initiated DeflateIdleMonitors");
1979   return ObjectSynchronizer::request_deflate_idle_monitors_from_wb();
1980 WB_END
1981 
1982 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1983   VM_ForceSafepoint force_safepoint_op;
1984   VMThread::execute(&force_safepoint_op);
1985 WB_END
1986 
1987 WB_ENTRY(void, WB_ForceClassLoaderStatsSafepoint(JNIEnv* env, jobject wb))
1988   nullStream dev_null;
1989   ClassLoaderStatsVMOperation force_op(&dev_null);
1990   VMThread::execute(&force_op);
1991 WB_END
1992 
1993 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1994   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1995   return (jlong) ik->constants();
1996 WB_END
1997 
1998 WB_ENTRY(jobjectArray, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass klass))
1999   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2000   objArrayOop resolved_refs= ik->constants()->resolved_references();
2001   return (jobjectArray)JNIHandles::make_local(THREAD, resolved_refs);
2002 WB_END
2003 
2004 WB_ENTRY(jobjectArray, WB_getObjectsViaKlassOopMaps(JNIEnv* env, jobject wb, jobject thing))
2005   oop aoop = JNIHandles::resolve(thing);
2006   if (!aoop->is_instance()) {
2007     return nullptr;
2008   }
2009   instanceHandle ih(THREAD, (instanceOop) aoop);
2010   InstanceKlass* klass = InstanceKlass::cast(ih->klass());
2011   if (klass->nonstatic_oop_map_count() == 0) {
2012     return nullptr;
2013   }
2014   const OopMapBlock* map = klass->start_of_nonstatic_oop_maps();
2015   const OopMapBlock* const end = map + klass->nonstatic_oop_map_count();
2016   int oop_count = 0;
2017   while (map < end) {
2018     oop_count += map->count();
2019     map++;
2020   }
2021 
2022   objArrayHandle result_array =
2023       oopFactory::new_objArray_handle(vmClasses::Object_klass(), oop_count, CHECK_NULL);
2024   map = klass->start_of_nonstatic_oop_maps();
2025   int index = 0;
2026   while (map < end) {
2027     int offset = map->offset();
2028     for (unsigned int j = 0; j < map->count(); j++) {
2029       result_array->obj_at_put(index++, ih->obj_field(offset));
2030       offset += heapOopSize;
2031     }
2032     map++;
2033   }
2034   return (jobjectArray)JNIHandles::make_local(THREAD, result_array());
2035 WB_END
2036 
2037 // Collect Object oops but not value objects...loaded from heap
2038 class CollectObjectOops : public BasicOopIterateClosure {
2039   public:
2040   GrowableArray<Handle>* _array;
2041 
2042   CollectObjectOops() {
2043       _array = new GrowableArray<Handle>(128);
2044   }
2045 
2046   void add_oop(oop o) {
2047     Handle oh = Handle(Thread::current(), o);
2048     if (oh != nullptr && oh->is_inline_type()) {
2049       oh->oop_iterate(this);
2050     } else {
2051       _array->append(oh);
2052     }
2053   }
2054 
2055   template <class T> inline void add_oop(T* p) { add_oop(HeapAccess<>::oop_load(p)); }
2056   void do_oop(oop* o) { add_oop(o); }
2057   void do_oop(narrowOop* v) { add_oop(v); }
2058 
2059   jobjectArray create_jni_result(JNIEnv* env, TRAPS) {
2060     objArrayHandle result_array =
2061         oopFactory::new_objArray_handle(vmClasses::Object_klass(), _array->length(), CHECK_NULL);
2062     for (int i = 0 ; i < _array->length(); i++) {
2063       result_array->obj_at_put(i, _array->at(i)());
2064     }
2065     return (jobjectArray)JNIHandles::make_local(THREAD, result_array());
2066   }
2067 };
2068 
2069 // Collect Object oops but not value objects...loaded from frames
2070 class CollectFrameObjectOops : public BasicOopIterateClosure {
2071  public:
2072   CollectObjectOops _collect;
2073 
2074   template <class T> inline void add_oop(T* p) { _collect.add_oop(RawAccess<>::oop_load(p)); }
2075   void do_oop(oop* o) { add_oop(o); }
2076   void do_oop(narrowOop* v) { add_oop(v); }
2077 
2078   jobjectArray create_jni_result(JNIEnv* env, TRAPS) {
2079     return _collect.create_jni_result(env, THREAD);
2080   }
2081 };
2082 
2083 // Collect Object oops for the given oop, iterate through value objects
2084 WB_ENTRY(jobjectArray, WB_getObjectsViaOopIterator(JNIEnv* env, jobject wb, jobject thing))
2085   ResourceMark rm(thread);
2086   Handle objh(thread, JNIHandles::resolve(thing));
2087   CollectObjectOops collectOops;
2088   objh->oop_iterate(&collectOops);
2089   return collectOops.create_jni_result(env, THREAD);
2090 WB_END
2091 
2092 // Collect Object oops for the given frame deep, iterate through value objects
2093 WB_ENTRY(jobjectArray, WB_getObjectsViaFrameOopIterator(JNIEnv* env, jobject wb, jint depth))
2094   KeepStackGCProcessedMark ksgcpm(THREAD);
2095   ResourceMark rm(THREAD);
2096   CollectFrameObjectOops collectOops;
2097   StackFrameStream sfs(thread, true /* update */, true /* process_frames */);
2098   while (depth > 0) { // Skip the native WB API frame
2099     sfs.next();
2100     frame* f = sfs.current();
2101     f->oops_do(&collectOops, nullptr, sfs.register_map());
2102     depth--;
2103   }
2104   return collectOops.create_jni_result(env, THREAD);
2105 WB_END
2106 
2107 WB_ENTRY(jint, WB_getFieldEntriesLength(JNIEnv* env, jobject wb, jclass klass))
2108   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2109   ConstantPool* cp = ik->constants();
2110   if (cp->cache() == nullptr) {
2111     return -1;
2112   }
2113   return cp->resolved_field_entries_length();
2114 WB_END
2115 
2116 WB_ENTRY(jint, WB_getFieldCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2117   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2118   ConstantPool* cp = ik->constants();
2119   if (cp->cache() == nullptr) {
2120       return -1;
2121   }
2122   return cp->resolved_field_entry_at(index)->constant_pool_index();
2123 WB_END
2124 
2125 WB_ENTRY(jint, WB_getMethodEntriesLength(JNIEnv* env, jobject wb, jclass klass))
2126   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2127   ConstantPool* cp = ik->constants();
2128   if (cp->cache() == nullptr) {
2129     return -1;
2130   }
2131   return cp->resolved_method_entries_length();
2132 WB_END
2133 
2134 WB_ENTRY(jint, WB_getMethodCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2135   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2136   ConstantPool* cp = ik->constants();
2137   if (cp->cache() == nullptr) {
2138       return -1;
2139   }
2140   return cp->resolved_method_entry_at(index)->constant_pool_index();
2141 WB_END
2142 
2143 WB_ENTRY(jint, WB_getIndyInfoLength(JNIEnv* env, jobject wb, jclass klass))
2144   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2145   ConstantPool* cp = ik->constants();
2146   if (cp->cache() == nullptr) {
2147       return -1;
2148   }
2149   return cp->resolved_indy_entries_length();
2150 WB_END
2151 
2152 WB_ENTRY(jint, WB_getIndyCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2153   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2154   ConstantPool* cp = ik->constants();
2155   if (cp->cache() == nullptr) {
2156       return -1;
2157   }
2158   return cp->resolved_indy_entry_at(index)->constant_pool_index();
2159 WB_END
2160 
2161 WB_ENTRY(jobject, WB_printClasses(JNIEnv* env, jobject wb, jstring class_name_pattern, jint flags))
2162   ThreadToNativeFromVM ttnfv(thread);
2163   const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2164   ResourceMark rm;
2165   stringStream st;
2166   {
2167     ThreadInVMfromNative ttvfn(thread); // back to VM
2168     ClassPrinter::print_classes(c, flags, &st);
2169   }
2170   jstring result = env->NewStringUTF(st.freeze());
2171   CHECK_JNI_EXCEPTION_(env, nullptr);
2172   return result;
2173 WB_END
2174 
2175 WB_ENTRY(jobject, WB_printMethods(JNIEnv* env, jobject wb, jstring class_name_pattern, jstring method_pattern, jint flags))
2176   ThreadToNativeFromVM ttnfv(thread);
2177   const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2178   const char* m = env->GetStringUTFChars(method_pattern, nullptr);
2179   ResourceMark rm;
2180   stringStream st;
2181   {
2182     ThreadInVMfromNative ttvfn(thread); // back to VM
2183     ClassPrinter::print_methods(c, m, flags, &st);
2184   }
2185   jstring result = env->NewStringUTF(st.freeze());
2186   CHECK_JNI_EXCEPTION_(env, nullptr);
2187   return result;
2188 WB_END
2189 
2190 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
2191   VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
2192   VMThread::execute(&clear_ics);
2193 WB_END
2194 
2195 template <typename T>
2196 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
2197   assert(value != nullptr, "sanity");
2198   if (method == nullptr || name == nullptr) {
2199     return false;
2200   }
2201   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
2202   CHECK_JNI_EXCEPTION_(env, false);
2203   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
2204   // can't be in VM when we call JNI
2205   ThreadToNativeFromVM ttnfv(thread);
2206   const char* flag_name = env->GetStringUTFChars(name, nullptr);
2207   CHECK_JNI_EXCEPTION_(env, false);
2208   CompileCommandEnum option = CompilerOracle::string_to_option(flag_name);
2209   env->ReleaseStringUTFChars(name, flag_name);
2210   if (option == CompileCommandEnum::Unknown) {
2211     return false;
2212   }
2213   if (!CompilerOracle::option_matches_type(option, *value)) {
2214     return false;
2215   }
2216   return CompilerOracle::has_option_value(mh, option, *value);
2217 }
2218 
2219 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2220   bool result;
2221   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
2222     // can't be in VM when we call JNI
2223     ThreadToNativeFromVM ttnfv(thread);
2224     return booleanBox(thread, env, result);
2225   }
2226   return nullptr;
2227 WB_END
2228 
2229 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2230   intx result;
2231   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
2232     // can't be in VM when we call JNI
2233     ThreadToNativeFromVM ttnfv(thread);
2234     return longBox(thread, env, result);
2235   }
2236   return nullptr;
2237 WB_END
2238 
2239 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2240   uintx result;
2241   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
2242     // can't be in VM when we call JNI
2243     ThreadToNativeFromVM ttnfv(thread);
2244     return longBox(thread, env, result);
2245   }
2246   return nullptr;
2247 WB_END
2248 
2249 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2250   double result;
2251   if (GetMethodOption <double> (thread, env, method, name, &result)) {
2252     // can't be in VM when we call JNI
2253     ThreadToNativeFromVM ttnfv(thread);
2254     return doubleBox(thread, env, result);
2255   }
2256   return nullptr;
2257 WB_END
2258 
2259 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2260   ccstr ccstrResult;
2261   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
2262     // can't be in VM when we call JNI
2263     ThreadToNativeFromVM ttnfv(thread);
2264     jstring result = env->NewStringUTF(ccstrResult);
2265     CHECK_JNI_EXCEPTION_(env, nullptr);
2266     return result;
2267   }
2268   return nullptr;
2269 WB_END
2270 
2271 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
2272   const char* p = CDSConfig::default_archive_path();
2273   ThreadToNativeFromVM ttn(thread);
2274   jstring path_string = env->NewStringUTF(p);
2275 
2276   CHECK_JNI_EXCEPTION_(env, nullptr);
2277 
2278   return path_string;
2279 WB_END
2280 
2281 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
2282   return CDSConfig::is_using_archive();
2283 WB_END
2284 
2285 WB_ENTRY(jint, WB_GetCDSGenericHeaderMinVersion(JNIEnv* env, jobject wb))
2286 #if INCLUDE_CDS
2287   return (jint)CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION;
2288 #else
2289   ShouldNotReachHere();
2290   return (jint)-1;
2291 #endif
2292 WB_END
2293 
2294 WB_ENTRY(jint, WB_GetCDSCurrentVersion(JNIEnv* env, jobject wb))
2295 #if INCLUDE_CDS
2296   return (jint)CURRENT_CDS_ARCHIVE_VERSION;
2297 #else
2298   ShouldNotReachHere();
2299   return (jint)-1;
2300 #endif
2301 WB_END
2302 
2303 WB_ENTRY(jboolean, WB_CDSMemoryMappingFailed(JNIEnv* env, jobject wb))
2304   return FileMapInfo::memory_mapping_failed();
2305 WB_END
2306 
2307 WB_ENTRY(jboolean, WB_IsSharedInternedString(JNIEnv* env, jobject wb, jobject str))
2308   ResourceMark rm(THREAD);
2309   oop str_oop = JNIHandles::resolve(str);
2310   int length;
2311   jchar* chars = java_lang_String::as_unicode_string(str_oop, length, CHECK_(false));
2312   return StringTable::lookup_shared(chars, length) == str_oop;
2313 WB_END
2314 
2315 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
2316   return (jboolean)AOTMetaspace::in_aot_cache(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2317 WB_END
2318 
2319 WB_ENTRY(jboolean, WB_AreSharedStringsMapped(JNIEnv* env))
2320   return ArchiveHeapLoader::is_mapped();
2321 WB_END
2322 
2323 WB_ENTRY(void, WB_LinkClass(JNIEnv* env, jobject wb, jclass clazz))
2324   Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2325   if (!k->is_instance_klass()) {
2326     return;
2327   }
2328   InstanceKlass *ik = InstanceKlass::cast(k);
2329   ik->link_class(THREAD); // may throw verification error
2330 WB_END
2331 
2332 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
2333   return ArchiveHeapLoader::is_mapped();
2334 WB_END
2335 
2336 WB_ENTRY(jboolean, WB_IsCDSIncluded(JNIEnv* env))
2337 #if INCLUDE_CDS
2338   // An exploded build inhibits use of CDS. Therefore, for the
2339   // purpose of testing, the JVM can be treated as not having CDS
2340   // built in at all.
2341   return ClassLoader::has_jrt_entry();
2342 #else
2343   return false;
2344 #endif // INCLUDE_CDS
2345 WB_END
2346 
2347 WB_ENTRY(jboolean, WB_isC2OrJVMCIIncluded(JNIEnv* env))
2348 #if COMPILER2_OR_JVMCI
2349   return true;
2350 #else
2351   return false;
2352 #endif
2353 WB_END
2354 
2355 WB_ENTRY(jboolean, WB_IsJVMCISupportedByGC(JNIEnv* env))
2356 #if INCLUDE_JVMCI
2357   return JVMCIGlobals::gc_supports_jvmci();
2358 #else
2359   return false;
2360 #endif
2361 WB_END
2362 
2363 WB_ENTRY(jboolean, WB_CanWriteJavaHeapArchive(JNIEnv* env))
2364   return !CDSConfig::are_vm_options_incompatible_with_dumping_heap();
2365 WB_END
2366 
2367 
2368 WB_ENTRY(jboolean, WB_IsJFRIncluded(JNIEnv* env))
2369 #if INCLUDE_JFR
2370   return true;
2371 #else
2372   return false;
2373 #endif // INCLUDE_JFR
2374 WB_END
2375 
2376 WB_ENTRY(jboolean, WB_IsDTraceIncluded(JNIEnv* env))
2377 #if defined(DTRACE_ENABLED)
2378   return true;
2379 #else
2380   return false;
2381 #endif // DTRACE_ENABLED
2382 WB_END
2383 
2384 #if INCLUDE_CDS
2385 
2386 WB_ENTRY(jint, WB_GetCDSOffsetForName(JNIEnv* env, jobject o, jstring name))
2387   ResourceMark rm;
2388   char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2389   jint result = (jint)CDSConstants::get_cds_offset(c_name);
2390   return result;
2391 WB_END
2392 
2393 WB_ENTRY(jint, WB_GetCDSConstantForName(JNIEnv* env, jobject o, jstring name))
2394   ResourceMark rm;
2395   char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2396   jint result = (jint)CDSConstants::get_cds_constant(c_name);
2397   return result;
2398 WB_END
2399 
2400 #endif // INCLUDE_CDS
2401 
2402 WB_ENTRY(jboolean, WB_HandshakeReadMonitors(JNIEnv* env, jobject wb, jobject thread_handle))
2403   class ReadMonitorsHandshakeClosure : public HandshakeClosure {
2404     jboolean _executed;
2405 
2406     void do_thread(Thread* th) {
2407       JavaThread* jt = JavaThread::cast(th);
2408       ResourceMark rm;
2409 
2410       GrowableArray<MonitorInfo*>* info = new GrowableArray<MonitorInfo*>();
2411 
2412       if (!jt->has_last_Java_frame()) {
2413         return;
2414       }
2415       RegisterMap rmap(jt,
2416                        RegisterMap::UpdateMap::include,
2417                        RegisterMap::ProcessFrames::include,
2418                        RegisterMap::WalkContinuation::skip);
2419       for (javaVFrame* vf = jt->last_java_vframe(&rmap); vf != nullptr; vf = vf->java_sender()) {
2420         GrowableArray<MonitorInfo*> *monitors = vf->monitors();
2421         if (monitors != nullptr) {
2422           int len = monitors->length();
2423           // Walk monitors youngest to oldest
2424           for (int i = len - 1; i >= 0; i--) {
2425             MonitorInfo* mon_info = monitors->at(i);
2426             if (mon_info->eliminated()) continue;
2427             oop owner = mon_info->owner();
2428             if (owner != nullptr) {
2429               info->append(mon_info);
2430             }
2431           }
2432         }
2433       }
2434       _executed = true;
2435     }
2436 
2437    public:
2438     ReadMonitorsHandshakeClosure() : HandshakeClosure("WB_HandshakeReadMonitors"), _executed(false) {}
2439     jboolean executed() const { return _executed; }
2440   };
2441 
2442   ReadMonitorsHandshakeClosure rmhc;
2443   if (thread_handle != nullptr) {
2444     ThreadsListHandle tlh;
2445     JavaThread* target = nullptr;
2446     bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2447     if (is_alive) {
2448       Handshake::execute(&rmhc, &tlh, target);
2449     }
2450   }
2451   return rmhc.executed();
2452 WB_END
2453 
2454 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
2455   class TraceSelfHandshakeClosure : public HandshakeClosure {
2456     jint _num_threads_completed;
2457 
2458     void do_thread(Thread* th) {
2459       JavaThread* jt = JavaThread::cast(th);
2460       ResourceMark rm;
2461 
2462       jt->print_on(tty);
2463       jt->print_stack_on(tty);
2464       tty->cr();
2465       AtomicAccess::inc(&_num_threads_completed);
2466     }
2467 
2468   public:
2469     TraceSelfHandshakeClosure(Thread* thread) : HandshakeClosure("WB_TraceSelf"), _num_threads_completed(0) {}
2470 
2471     jint num_threads_completed() const { return _num_threads_completed; }
2472   };
2473   TraceSelfHandshakeClosure tshc(Thread::current());
2474 
2475   if (all_threads) {
2476     Handshake::execute(&tshc);
2477   } else if (thread_handle != nullptr) {
2478     ThreadsListHandle tlh;
2479     JavaThread* target = nullptr;
2480     bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2481     if (is_alive) {
2482       Handshake::execute(&tshc, &tlh, target);
2483     }
2484   }
2485   return tshc.num_threads_completed();
2486 WB_END
2487 
2488 WB_ENTRY(void, WB_AsyncHandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle))
2489   class TraceSelfHandshakeClosure : public AsyncHandshakeClosure {
2490     JavaThread* _self;
2491     void do_thread(Thread* th) {
2492       assert(th->is_Java_thread(), "sanity");
2493       // AsynchHandshake handshakes are only executed by target.
2494       assert(_self == th, "Must be");
2495       assert(Thread::current() == th, "Must be");
2496       JavaThread* jt = JavaThread::cast(th);
2497       ResourceMark rm;
2498       jt->print_on(tty);
2499       jt->print_stack_on(tty);
2500       tty->cr();
2501     }
2502 
2503   public:
2504     TraceSelfHandshakeClosure(JavaThread* self_target) : AsyncHandshakeClosure("WB_TraceSelf"), _self(self_target) {}
2505   };
2506   if (thread_handle != nullptr) {
2507     ThreadsListHandle tlh;
2508     JavaThread* target = nullptr;
2509     bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2510     if (is_alive) {
2511       TraceSelfHandshakeClosure* tshc = new TraceSelfHandshakeClosure(target);
2512       Handshake::execute(tshc, target);
2513     }
2514   }
2515 WB_END
2516 
2517 static volatile int _emulated_lock = 0;
2518 
2519 WB_ENTRY(void, WB_LockAndBlock(JNIEnv* env, jobject wb, jboolean suspender))
2520   JavaThread* self = JavaThread::current();
2521 
2522   {
2523     // Before trying to acquire the lock transition into a safepoint safe state.
2524     // Otherwise if either suspender or suspendee blocks for a safepoint
2525     // in ~ThreadBlockInVM the other one could loop forever trying to acquire
2526     // the lock without allowing the safepoint to progress.
2527     ThreadBlockInVM tbivm(self);
2528 
2529     // We will deadlock here if we are 'suspender' and 'suspendee'
2530     // suspended in ~ThreadBlockInVM. This verifies we only suspend
2531     // at the right place.
2532     while (AtomicAccess::cmpxchg(&_emulated_lock, 0, 1) != 0) {}
2533     assert(_emulated_lock == 1, "Must be locked");
2534 
2535     // Sleep much longer in suspendee to force situation where
2536     // 'suspender' is waiting above to acquire lock.
2537     os::naked_short_sleep(suspender ? 1 : 10);
2538   }
2539   AtomicAccess::store(&_emulated_lock, 0);
2540 WB_END
2541 
2542 // Some convenience methods to deal with objects from java
2543 int WhiteBox::offset_for_field(const char* field_name, oop object,
2544     Symbol* signature_symbol) {
2545   assert(field_name != nullptr && strlen(field_name) > 0, "Field name not valid");
2546 
2547   //Only non-array oops have fields. Don't call this function on arrays!
2548   InstanceKlass* ik = InstanceKlass::cast(object->klass());
2549 
2550   //Create symbols to look for in the class
2551   TempNewSymbol name_symbol = SymbolTable::new_symbol(field_name);
2552 
2553   //To be filled in with an offset of the field we're looking for
2554   fieldDescriptor fd;
2555 
2556   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2557   if (res == nullptr) {
2558     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2559         name_symbol->as_C_string());
2560     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2561   }
2562 
2563   //fetch the field at the offset we've found
2564   int dest_offset = fd.offset();
2565 
2566   return dest_offset;
2567 }
2568 
2569 
2570 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2571   int offset = offset_for_field(field_name, object,
2572       vmSymbols::string_signature());
2573   oop string = object->obj_field(offset);
2574   if (string == nullptr) {
2575     return nullptr;
2576   }
2577   const char* ret = java_lang_String::as_utf8_string(string);
2578   return ret;
2579 }
2580 
2581 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2582   int offset =
2583       offset_for_field(field_name, object, vmSymbols::bool_signature());
2584   bool ret = (object->bool_field(offset) == JNI_TRUE);
2585   return ret;
2586 }
2587 
2588 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2589   ResourceMark rm;
2590   Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(wbclass));
2591   const char* klass_name = klass->external_name();
2592 
2593   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2594 
2595   //  one by one registration natives for exception catching
2596   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2597   CHECK_JNI_EXCEPTION(env);
2598   for (int i = 0, n = method_count; i < n; ++i) {
2599     // Skip dummy entries
2600     if (method_array[i].fnPtr == nullptr) continue;
2601     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2602       jthrowable throwable_obj = env->ExceptionOccurred();
2603       if (throwable_obj != nullptr) {
2604         env->ExceptionClear();
2605         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2606           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2607           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2608           tty->print_cr("Warning: 'NoSuchMethodError' on register of %s::%s%s",
2609               klass_name, method_array[i].name, method_array[i].signature);
2610         }
2611       } else {
2612         // Registration failed unexpectedly.
2613         tty->print_cr("Warning: unexpected error on register of %s::%s%s. All methods will be unregistered",
2614             klass_name, method_array[i].name, method_array[i].signature);
2615         env->UnregisterNatives(wbclass);
2616         break;
2617       }
2618     }
2619   }
2620 }
2621 
2622 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2623   // can't be in VM when we call JNI
2624   ThreadToNativeFromVM ttnfv(thread);
2625   const char* dir = env->GetStringUTFChars(compDirect, nullptr);
2626   CHECK_JNI_EXCEPTION_(env, 0);
2627   int ret;
2628   {
2629     ThreadInVMfromNative ttvfn(thread); // back to VM
2630     ret = DirectivesParser::parse_string(dir, tty);
2631   }
2632   env->ReleaseStringUTFChars(compDirect, dir);
2633   // -1 for error parsing directive. Return 0 as number of directives added.
2634   if (ret == -1) {
2635     ret = 0;
2636   }
2637   return (jint) ret;
2638 WB_END
2639 
2640 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2641   DirectivesStack::pop(count);
2642 WB_END
2643 
2644 // Checks that the library libfile has the noexecstack bit set.
2645 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2646   jboolean ret = false;
2647 #ifdef LINUX
2648   // Can't be in VM when we call JNI.
2649   ThreadToNativeFromVM ttnfv(thread);
2650   const char* lf = env->GetStringUTFChars(libfile, nullptr);
2651   CHECK_JNI_EXCEPTION_(env, 0);
2652   ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2653   env->ReleaseStringUTFChars(libfile, lf);
2654 #endif
2655   return ret;
2656 WB_END
2657 
2658 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2659   LINUX_ONLY(return OSContainer::is_containerized();)
2660   return false;
2661 WB_END
2662 
2663 // Physical memory of the host machine (including containers)
2664 WB_ENTRY(jlong, WB_HostPhysicalMemory(JNIEnv* env, jobject o))
2665   LINUX_ONLY(return static_cast<jlong>(os::Linux::physical_memory());)
2666   return static_cast<jlong>(os::physical_memory());
2667 WB_END
2668 
2669 // Available memory of the host machine (container-aware)
2670 WB_ENTRY(jlong, WB_HostAvailableMemory(JNIEnv* env, jobject o))
2671   physical_memory_size_type avail_mem = 0;
2672   // Return value ignored - defaulting to 0 on failure.
2673   (void)os::available_memory(avail_mem);
2674   return static_cast<jlong>(avail_mem);
2675 WB_END
2676 
2677 // Physical swap of the host machine (including containers), Linux only.
2678 WB_ENTRY(jlong, WB_HostPhysicalSwap(JNIEnv* env, jobject o))
2679   LINUX_ONLY(return (jlong)os::Linux::host_swap();)
2680   return -1; // Not used/implemented on other platforms
2681 WB_END
2682 
2683 WB_ENTRY(jint, WB_ValidateCgroup(JNIEnv* env,
2684                                     jobject o,
2685                                     jboolean cgroups_v2_enabled,
2686                                     jstring controllers_file,
2687                                     jstring proc_self_cgroup,
2688                                     jstring proc_self_mountinfo))
2689   jint ret = 0;
2690 #ifdef LINUX
2691   ThreadToNativeFromVM ttnfv(thread);
2692   const char* c_file = env->GetStringUTFChars(controllers_file, nullptr);
2693   CHECK_JNI_EXCEPTION_(env, 0);
2694   const char* p_s_cgroup = env->GetStringUTFChars(proc_self_cgroup, nullptr);
2695   CHECK_JNI_EXCEPTION_(env, 0);
2696   const char* p_s_mountinfo = env->GetStringUTFChars(proc_self_mountinfo, nullptr);
2697   CHECK_JNI_EXCEPTION_(env, 0);
2698   u1 cg_type_flags = 0;
2699   // This sets cg_type_flags
2700   WhiteBox::validate_cgroup(cgroups_v2_enabled, c_file, p_s_cgroup, p_s_mountinfo, &cg_type_flags);
2701   ret = (jint)cg_type_flags;
2702   env->ReleaseStringUTFChars(controllers_file, c_file);
2703   env->ReleaseStringUTFChars(proc_self_cgroup, p_s_cgroup);
2704   env->ReleaseStringUTFChars(proc_self_mountinfo, p_s_mountinfo);
2705 #endif
2706   return ret;
2707 WB_END
2708 
2709 // Available cpus of the host machine, Linux only.
2710 // Used in container testing.
2711 WB_ENTRY(jint, WB_HostCPUs(JNIEnv* env, jobject o))
2712   LINUX_ONLY(return os::Linux::active_processor_count();)
2713   return -1; // Not used/implemented on other platforms
2714 WB_END
2715 
2716 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2717   os::print_os_info(tty);
2718 WB_END
2719 
2720 // Elf decoder
2721 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2722 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2723   ElfFile::_do_not_cache_elf_section = true;
2724 #endif
2725 WB_END
2726 
2727 WB_ENTRY(jlong, WB_ResolvedMethodItemsCount(JNIEnv* env, jobject o))
2728   return (jlong) ResolvedMethodTable::items_count();
2729 WB_END
2730 
2731 WB_ENTRY(jint, WB_GetKlassMetadataSize(JNIEnv* env, jobject wb, jclass mirror))
2732   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(mirror));
2733   // Return size in bytes.
2734   return k->size() * wordSize;
2735 WB_END
2736 
2737 // See test/hotspot/jtreg/runtime/Thread/ThreadObjAccessAtExit.java.
2738 // It explains how the thread's priority field is used for test state coordination.
2739 //
2740 WB_ENTRY(void, WB_CheckThreadObjOfTerminatingThread(JNIEnv* env, jobject wb, jobject target_handle))
2741   oop target_oop = JNIHandles::resolve_non_null(target_handle);
2742   jlong tid = java_lang_Thread::thread_id(target_oop);
2743   JavaThread* target = java_lang_Thread::thread(target_oop);
2744 
2745   // Grab a ThreadsListHandle to protect the target thread whilst terminating
2746   ThreadsListHandle tlh;
2747 
2748   // Look up the target thread by tid to ensure it is present
2749   JavaThread* t = tlh.list()->find_JavaThread_from_java_tid(tid);
2750   if (t == nullptr) {
2751     THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread not found in ThreadsList!");
2752   }
2753 
2754   tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is protected");
2755   // Allow target to terminate by boosting priority
2756   java_lang_Thread::set_priority(t->threadObj(), ThreadPriority(NormPriority + 1));
2757 
2758   // Now wait for the target to terminate
2759   while (!target->is_terminated()) {
2760     ThreadBlockInVM tbivm(thread);  // just in case target is involved in a safepoint
2761     os::naked_short_sleep(0);
2762   }
2763 
2764   tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is terminated");
2765 
2766   // Now release the GC inducing thread - we have to re-resolve the external oop that
2767   // was passed in as GC may have occurred and we don't know if we can trust t->threadObj() now.
2768   oop original = JNIHandles::resolve_non_null(target_handle);
2769   java_lang_Thread::set_priority(original, ThreadPriority(NormPriority + 2));
2770 
2771   tty->print_cr("WB_CheckThreadObjOfTerminatingThread: GC has been initiated - checking threadObj:");
2772 
2773   // The Java code should be creating garbage and triggering GC, which would potentially move
2774   // the threadObj oop. If the exiting thread is properly protected then its threadObj should
2775   // remain valid and equal to our initial target_handle. Loop a few times to give GC a chance to
2776   // kick in.
2777   for (int i = 0; i < 5; i++) {
2778     oop original = JNIHandles::resolve_non_null(target_handle);
2779     oop current = t->threadObj();
2780     if (original != current) {
2781       tty->print_cr("WB_CheckThreadObjOfTerminatingThread: failed comparison on iteration %d", i);
2782       THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread oop has changed!");
2783     } else {
2784       tty->print_cr("WB_CheckThreadObjOfTerminatingThread: successful comparison on iteration %d", i);
2785       ThreadBlockInVM tbivm(thread);
2786       os::naked_short_sleep(50);
2787     }
2788   }
2789 WB_END
2790 
2791 WB_ENTRY(void, WB_VerifyFrames(JNIEnv* env, jobject wb, jboolean log, jboolean update_map))
2792   ResourceMark rm; // for verify
2793   stringStream st;
2794   for (StackFrameStream fst(JavaThread::current(), update_map, true); !fst.is_done(); fst.next()) {
2795     frame* current_frame = fst.current();
2796     if (log) {
2797       current_frame->print_value_on(&st);
2798     }
2799     current_frame->verify(fst.register_map());
2800   }
2801   if (log) {
2802     tty->print_cr("[WhiteBox::VerifyFrames] Walking Frames");
2803     tty->print_raw(st.freeze());
2804     tty->print_cr("[WhiteBox::VerifyFrames] Done");
2805   }
2806 WB_END
2807 
2808 WB_ENTRY(jboolean, WB_IsJVMTIIncluded(JNIEnv* env, jobject wb))
2809 #if INCLUDE_JVMTI
2810   return JNI_TRUE;
2811 #else
2812   return JNI_FALSE;
2813 #endif
2814 WB_END
2815 
2816 WB_ENTRY(void, WB_WaitUnsafe(JNIEnv* env, jobject wb, jint time))
2817     os::naked_short_sleep(time);
2818 WB_END
2819 
2820 WB_ENTRY(void, WB_BusyWaitCPUTime(JNIEnv* env, jobject wb, jint time))
2821   ThreadToNativeFromVM  ttn(thread);
2822   u8 start = os::current_thread_cpu_time();
2823   u8 target_duration = time * (u8)1000000;
2824   while (os::current_thread_cpu_time() - start < target_duration) {
2825     for (volatile int i = 0; i < 1000000; i++);
2826   }
2827 WB_END
2828 
2829 WB_ENTRY(jboolean, WB_CPUSamplerSetOutOfStackWalking(JNIEnv* env, jobject wb, jboolean enable))
2830   #if defined(ASSERT) && INCLUDE_JFR && defined(LINUX)
2831     return JfrCPUTimeThreadSampling::set_out_of_stack_walking_enabled(enable == JNI_TRUE) ? JNI_TRUE : JNI_FALSE;
2832   #else
2833     return JNI_FALSE;
2834   #endif
2835 WB_END
2836 
2837 WB_ENTRY(jstring, WB_GetLibcName(JNIEnv* env, jobject o))
2838   ThreadToNativeFromVM ttn(thread);
2839   jstring info_string = env->NewStringUTF(XSTR(LIBC));
2840   CHECK_JNI_EXCEPTION_(env, nullptr);
2841   return info_string;
2842 WB_END
2843 
2844 WB_ENTRY(void, WB_PinObject(JNIEnv* env, jobject wb, jobject o))
2845 #if INCLUDE_G1GC
2846   if (!UseG1GC) {
2847     ShouldNotReachHere();
2848     return;
2849   }
2850   oop obj = JNIHandles::resolve(o);
2851   G1CollectedHeap::heap()->pin_object(thread, obj);
2852 #else
2853   ShouldNotReachHere();
2854 #endif // INCLUDE_G1GC
2855 WB_END
2856 
2857 WB_ENTRY(void, WB_UnpinObject(JNIEnv* env, jobject wb, jobject o))
2858 #if INCLUDE_G1GC
2859   if (!UseG1GC) {
2860     ShouldNotReachHere();
2861     return;
2862   }
2863   oop obj = JNIHandles::resolve(o);
2864   G1CollectedHeap::heap()->unpin_object(thread, obj);
2865 #else
2866   ShouldNotReachHere();
2867 #endif // INCLUDE_G1GC
2868 WB_END
2869 
2870 WB_ENTRY(jboolean, WB_SetVirtualThreadsNotifyJvmtiMode(JNIEnv* env, jobject wb, jboolean enable))
2871   if (!Continuations::enabled()) {
2872     tty->print_cr("WB error: must be Continuations::enabled()!");
2873     return JNI_FALSE;
2874   }
2875   jboolean result = false;
2876 #if INCLUDE_JVMTI
2877   if (enable) {
2878     result = JvmtiEnvBase::enable_virtual_threads_notify_jvmti();
2879   } else {
2880     result = JvmtiEnvBase::disable_virtual_threads_notify_jvmti();
2881   }
2882 #endif
2883   return result;
2884 WB_END
2885 
2886 WB_ENTRY(void, WB_PreTouchMemory(JNIEnv* env, jobject wb, jlong addr, jlong size))
2887   void* const from = (void*)addr;
2888   void* const to = (void*)(addr + size);
2889   if (from > to) {
2890     os::pretouch_memory(from, to, os::vm_page_size());
2891   }
2892 WB_END
2893 
2894 WB_ENTRY(void, WB_CleanMetaspaces(JNIEnv* env, jobject target))
2895   ClassLoaderDataGraph::safepoint_and_clean_metaspaces();
2896 WB_END
2897 
2898 // Reports resident set size (RSS) in bytes
2899 WB_ENTRY(jlong, WB_Rss(JNIEnv* env, jobject o))
2900   return os::rss();
2901 WB_END
2902 
2903 WB_ENTRY(void, WB_ControlledCrash(JNIEnv* env, jobject o, jint how))
2904 #ifdef ASSERT
2905   VMError::controlled_crash(how);
2906 #else
2907   THROW_MSG(vmSymbols::java_lang_UnsupportedOperationException(), "Only available in debug builds");
2908 #endif
2909 WB_END
2910 
2911 #define CC (char*)
2912 
2913 static JNINativeMethod methods[] = {
2914   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
2915   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
2916   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
2917   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
2918   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
2919   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
2920   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
2921   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
2922   {CC"getHeapAlignment",                 CC"()J",                   (void*)&WB_GetHeapAlignment},
2923   {CC"countAliveClasses0",               CC"(Ljava/lang/String;)I", (void*)&WB_CountAliveClasses },
2924   {CC"getSymbolRefcount",                CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2925   {CC"parseCommandLine0",
2926       CC"(Ljava/lang/String;C[Ljdk/test/whitebox/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2927       (void*) &WB_ParseCommandLine
2928   },
2929   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2930                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
2931   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
2932                                                       (void*)&WB_AddToSystemClassLoaderSearch},
2933   {CC"getCompressedOopsMaxHeapSize", CC"()J",
2934       (void*)&WB_GetCompressedOopsMaxHeapSize},
2935   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
2936   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
2937   {CC"decodeNKlassAndAccessKlass",CC"(I)V",            (void*)&WB_DecodeNKlassAndAccessKlass},
2938   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
2939 #if INCLUDE_CDS
2940   {CC"getCDSOffsetForName0", CC"(Ljava/lang/String;)I",  (void*)&WB_GetCDSOffsetForName},
2941   {CC"getCDSConstantForName0", CC"(Ljava/lang/String;)I",  (void*)&WB_GetCDSConstantForName},
2942 #endif
2943 #if INCLUDE_G1GC
2944   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
2945   {CC"g1CompletedConcurrentMarkCycles", CC"()I",      (void*)&WB_G1CompletedConcurrentMarkCycles},
2946   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
2947   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
2948   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
2949   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
2950   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
2951   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
2952   {CC"g1HasRegionsToUncommit",  CC"()Z",              (void*)&WB_G1HasRegionsToUncommit},
2953   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2954                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
2955   {CC"g1ActiveMemoryNodeCount", CC"()I",              (void*)&WB_G1ActiveMemoryNodeCount },
2956   {CC"g1MemoryNodeIds",    CC"()[I",                  (void*)&WB_G1MemoryNodeIds },
2957   {CC"g1GetMixedGCInfo",   CC"(I)[J",                 (void*)&WB_G1GetMixedGCInfo },
2958 #endif // INCLUDE_G1GC
2959   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
2960   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
2961   {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J",   (void*)&WB_NMTMallocWithPseudoStackAndType},
2962   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
2963   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
2964   {CC"NMTAttemptReserveMemoryAt",    CC"(JJ)J",       (void*)&WB_NMTAttemptReserveMemoryAt },
2965   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
2966   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
2967   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
2968   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
2969   {CC"NMTNewArena",         CC"(J)J",                 (void*)&WB_NMTNewArena        },
2970   {CC"NMTFreeArena",        CC"(J)V",                 (void*)&WB_NMTFreeArena       },
2971   {CC"NMTArenaMalloc",      CC"(JJ)V",                (void*)&WB_NMTArenaMalloc     },
2972   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
2973   {CC"isFrameDeoptimized", CC"(I)Z",                  (void*)&WB_IsFrameDeoptimized},
2974   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
2975   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
2976                                                       (void*)&WB_DeoptimizeMethod  },
2977   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
2978                                                       (void*)&WB_IsMethodCompiled  },
2979   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
2980                                                       (void*)&WB_IsMethodCompilable},
2981   {CC"isMethodQueuedForCompilation0",
2982       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
2983   {CC"isIntrinsicAvailable0",
2984       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
2985                                                       (void*)&WB_IsIntrinsicAvailable},
2986   {CC"makeMethodNotCompilable0",
2987       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
2988   {CC"testSetDontInlineMethod0",
2989       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
2990   {CC"getMethodCompilationLevel0",
2991       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
2992   {CC"getMethodDecompileCount0",
2993       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodDecompileCount},
2994   {CC"getMethodTrapCount0",
2995       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2996                                                       (void*)&WB_GetMethodTrapCount},
2997   {CC"getDeoptCount0",
2998       CC"(Ljava/lang/String;Ljava/lang/String;)I",    (void*)&WB_GetDeoptCount},
2999   {CC"getMethodEntryBci0",
3000       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
3001   {CC"getCompileQueueSize",
3002       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
3003   {CC"testSetForceInlineMethod0",
3004       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
3005   {CC"enqueueMethodForCompilation0",
3006       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
3007   {CC"enqueueInitializerForCompilation0",
3008       CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
3009   {CC"markMethodProfiled",
3010       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_MarkMethodProfiled},
3011   {CC"clearMethodState0",
3012       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
3013   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
3014   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
3015   {CC"matchesMethod",
3016       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
3017                                                       (void*)&WB_MatchesMethod},
3018   {CC"matchesInline",
3019       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
3020                                                       (void*)&WB_MatchesInline},
3021   {CC"shouldPrintAssembly",
3022         CC"(Ljava/lang/reflect/Executable;I)Z",
3023                                                         (void*)&WB_ShouldPrintAssembly},
3024 
3025   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
3026   {CC"isDefaultVMFlag",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsDefaultVMFlag},
3027   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
3028   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
3029   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
3030   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
3031   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
3032   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
3033   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
3034   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
3035   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
3036   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
3037                                                       (void*)&WB_SetStringVMFlag},
3038   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
3039                                                       (void*)&WB_GetBooleanVMFlag},
3040   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
3041                                                       (void*)&WB_GetIntVMFlag},
3042   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
3043                                                       (void*)&WB_GetUintVMFlag},
3044   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
3045                                                       (void*)&WB_GetIntxVMFlag},
3046   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
3047                                                       (void*)&WB_GetUintxVMFlag},
3048   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
3049                                                       (void*)&WB_GetUint64VMFlag},
3050   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
3051                                                       (void*)&WB_GetSizeTVMFlag},
3052   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
3053                                                       (void*)&WB_GetDoubleVMFlag},
3054   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
3055                                                       (void*)&WB_GetStringVMFlag},
3056   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
3057   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
3058   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
3059   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
3060   {CC"allocateMetaspace",
3061      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
3062   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
3063   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
3064   {CC"metaspaceSharedRegionAlignment", CC"()J",       (void*)&WB_AOTMetaspaceRegionAlignment },
3065   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
3066   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
3067                                                       (void*)&WB_GetNMethod         },
3068   {CC"relocateNMethodFromMethod0", CC"(Ljava/lang/reflect/Executable;I)V",
3069                                                       (void*)&WB_RelocateNMethodFromMethod },
3070   {CC"relocateNMethodFromAddr", CC"(JI)V",            (void*)&WB_RelocateNMethodFromAddr },
3071   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
3072   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
3073   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
3074   {CC"getCompilationActivityMode",
3075                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
3076   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
3077                                                       (void*)&WB_GetMethodData      },
3078   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
3079   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
3080   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
3081   {CC"DefineModule",       CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
3082                                                       (void*)&WB_DefineModule },
3083   {CC"AddModuleExports",   CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
3084                                                       (void*)&WB_AddModuleExports },
3085   {CC"AddReadsModule",     CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
3086                                                       (void*)&WB_AddReadsModule },
3087   {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
3088                                                       (void*)&WB_AddModuleExportsToAllUnnamed },
3089   {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
3090                                                       (void*)&WB_AddModuleExportsToAll },
3091   {CC"deflateIdleMonitors", CC"()Z",                  (void*)&WB_DeflateIdleMonitors },
3092   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
3093   {CC"isAsanEnabled", CC"()Z",                        (void*)&WB_IsAsanEnabled },
3094   {CC"isUbsanEnabled", CC"()Z",                       (void*)&WB_IsUbsanEnabled },
3095   {CC"getInUseMonitorCount", CC"()J", (void*)&WB_getInUseMonitorCount  },
3096   {CC"getLockStackCapacity", CC"()I",                 (void*)&WB_getLockStackCapacity },
3097   {CC"supportsRecursiveLightweightLocking", CC"()Z",  (void*)&WB_supportsRecursiveLightweightLocking },
3098   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
3099   {CC"forceClassLoaderStatsSafepoint", CC"()V",       (void*)&WB_ForceClassLoaderStatsSafepoint },
3100   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
3101   {CC"getResolvedReferences0", CC"(Ljava/lang/Class;)[Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
3102   {CC"getObjectsViaKlassOopMaps0",
3103       CC"(Ljava/lang/Object;)[Ljava/lang/Object;",    (void*)&WB_getObjectsViaKlassOopMaps},
3104   {CC"getObjectsViaOopIterator0",
3105           CC"(Ljava/lang/Object;)[Ljava/lang/Object;",(void*)&WB_getObjectsViaOopIterator},
3106   {CC"getObjectsViaFrameOopIterator",
3107       CC"(I)[Ljava/lang/Object;",                     (void*)&WB_getObjectsViaFrameOopIterator},
3108   {CC"getFieldEntriesLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_getFieldEntriesLength},
3109   {CC"getFieldCPIndex0",    CC"(Ljava/lang/Class;I)I", (void*)&WB_getFieldCPIndex},
3110   {CC"getMethodEntriesLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_getMethodEntriesLength},
3111   {CC"getMethodCPIndex0",    CC"(Ljava/lang/Class;I)I", (void*)&WB_getMethodCPIndex},
3112   {CC"getIndyInfoLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_getIndyInfoLength},
3113   {CC"getIndyCPIndex0",    CC"(Ljava/lang/Class;I)I", (void*)&WB_getIndyCPIndex},
3114   {CC"printClasses0",      CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printClasses},
3115   {CC"printMethods0",      CC"(Ljava/lang/String;Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printMethods},
3116   {CC"getMethodBooleanOption",
3117       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
3118                                                       (void*)&WB_GetMethodBooleaneOption},
3119   {CC"getMethodIntxOption",
3120       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
3121                                                       (void*)&WB_GetMethodIntxOption},
3122   {CC"getMethodUintxOption",
3123       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
3124                                                       (void*)&WB_GetMethodUintxOption},
3125   {CC"getMethodDoubleOption",
3126       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
3127                                                       (void*)&WB_GetMethodDoubleOption},
3128   {CC"getMethodStringOption",
3129       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
3130                                                       (void*)&WB_GetMethodStringOption},
3131   {CC"getDefaultArchivePath",             CC"()Ljava/lang/String;",
3132                                                       (void*)&WB_GetDefaultArchivePath},
3133   {CC"getCDSGenericHeaderMinVersion",     CC"()I",    (void*)&WB_GetCDSGenericHeaderMinVersion},
3134   {CC"getCurrentCDSVersion",              CC"()I",    (void*)&WB_GetCDSCurrentVersion},
3135   {CC"isSharingEnabled",   CC"()Z",                   (void*)&WB_IsSharingEnabled},
3136   {CC"isSharedInternedString", CC"(Ljava/lang/String;)Z", (void*)&WB_IsSharedInternedString },
3137   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
3138   {CC"areSharedStringsMapped",            CC"()Z",    (void*)&WB_AreSharedStringsMapped },
3139   {CC"linkClass",          CC"(Ljava/lang/Class;)V",  (void*)&WB_LinkClass},
3140   {CC"areOpenArchiveHeapObjectsMapped",   CC"()Z",    (void*)&WB_AreOpenArchiveHeapObjectsMapped},
3141   {CC"isCDSIncluded",                     CC"()Z",    (void*)&WB_IsCDSIncluded },
3142   {CC"isJFRIncluded",                     CC"()Z",    (void*)&WB_IsJFRIncluded },
3143   {CC"isDTraceIncluded",                  CC"()Z",    (void*)&WB_IsDTraceIncluded },
3144   {CC"hasLibgraal",                       CC"()Z",    (void*)&WB_HasLibgraal },
3145   {CC"isC2OrJVMCIIncluded",               CC"()Z",    (void*)&WB_isC2OrJVMCIIncluded },
3146   {CC"isJVMCISupportedByGC",              CC"()Z",    (void*)&WB_IsJVMCISupportedByGC},
3147   {CC"canWriteJavaHeapArchive",           CC"()Z",    (void*)&WB_CanWriteJavaHeapArchive },
3148   {CC"cdsMemoryMappingFailed",            CC"()Z",    (void*)&WB_CDSMemoryMappingFailed },
3149 
3150   {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
3151   {CC"handshakeReadMonitors", CC"(Ljava/lang/Thread;)Z", (void*)&WB_HandshakeReadMonitors },
3152   {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
3153   {CC"asyncHandshakeWalkStack", CC"(Ljava/lang/Thread;)V", (void*)&WB_AsyncHandshakeWalkStack },
3154   {CC"lockAndBlock", CC"(Z)V",                        (void*)&WB_LockAndBlock},
3155   {CC"checkThreadObjOfTerminatingThread", CC"(Ljava/lang/Thread;)V", (void*)&WB_CheckThreadObjOfTerminatingThread },
3156   {CC"verifyFrames",                CC"(ZZ)V",            (void*)&WB_VerifyFrames },
3157   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
3158                                                       (void*)&WB_AddCompilerDirective },
3159   {CC"removeCompilerDirective",   CC"(I)V",           (void*)&WB_RemoveCompilerDirective },
3160   {CC"isGCSupported",             CC"(I)Z",           (void*)&WB_IsGCSupported},
3161   {CC"isGCSupportedByJVMCICompiler", CC"(I)Z",        (void*)&WB_IsGCSupportedByJVMCICompiler},
3162   {CC"isGCSelected",              CC"(I)Z",           (void*)&WB_IsGCSelected},
3163   {CC"isGCSelectedErgonomically", CC"()Z",            (void*)&WB_IsGCSelectedErgonomically},
3164   {CC"supportsConcurrentGCBreakpoints", CC"()Z",      (void*)&WB_SupportsConcurrentGCBreakpoints},
3165   {CC"concurrentGCAcquireControl0", CC"()V",          (void*)&WB_ConcurrentGCAcquireControl},
3166   {CC"concurrentGCReleaseControl0", CC"()V",          (void*)&WB_ConcurrentGCReleaseControl},
3167   {CC"concurrentGCRunToIdle0",    CC"()V",            (void*)&WB_ConcurrentGCRunToIdle},
3168   {CC"concurrentGCRunTo0",        CC"(Ljava/lang/String;)Z",
3169                                                       (void*)&WB_ConcurrentGCRunTo},
3170   {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
3171                                                       (void*)&WB_CheckLibSpecifiesNoexecstack},
3172   {CC"isContainerized",           CC"()Z",            (void*)&WB_IsContainerized },
3173   {CC"validateCgroup",
3174       CC"(ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
3175                                                       (void*)&WB_ValidateCgroup },
3176   {CC"hostPhysicalMemory",        CC"()J",            (void*)&WB_HostPhysicalMemory },
3177   {CC"hostPhysicalSwap",          CC"()J",            (void*)&WB_HostPhysicalSwap },
3178   {CC"hostAvailableMemory",       CC"()J",            (void*)&WB_HostAvailableMemory },
3179   {CC"hostCPUs",                  CC"()I",            (void*)&WB_HostCPUs },
3180   {CC"printOsInfo",               CC"()V",            (void*)&WB_PrintOsInfo },
3181   {CC"disableElfSectionCache",    CC"()V",            (void*)&WB_DisableElfSectionCache },
3182   {CC"resolvedMethodItemsCount",  CC"()J",            (void*)&WB_ResolvedMethodItemsCount },
3183   {CC"getKlassMetadataSize", CC"(Ljava/lang/Class;)I",(void*)&WB_GetKlassMetadataSize},
3184 
3185   {CC"createMetaspaceTestContext", CC"(JJ)J",         (void*)&WB_CreateMetaspaceTestContext},
3186   {CC"destroyMetaspaceTestContext", CC"(J)V",         (void*)&WB_DestroyMetaspaceTestContext},
3187   {CC"purgeMetaspaceTestContext", CC"(J)V",           (void*)&WB_PurgeMetaspaceTestContext},
3188   {CC"printMetaspaceTestContext", CC"(J)V",           (void*)&WB_PrintMetaspaceTestContext},
3189   {CC"getTotalCommittedBytesInMetaspaceTestContext", CC"(J)J",(void*)&WB_GetTotalCommittedBytesInMetaspaceTestContext},
3190   {CC"getTotalUsedBytesInMetaspaceTestContext", CC"(J)J", (void*)&WB_GetTotalUsedBytesInMetaspaceTestContext},
3191   {CC"createArenaInTestContext", CC"(JZ)J",           (void*)&WB_CreateArenaInTestContext},
3192   {CC"destroyMetaspaceTestArena", CC"(J)V",           (void*)&WB_DestroyMetaspaceTestArena},
3193   {CC"allocateFromMetaspaceTestArena", CC"(JJ)J",     (void*)&WB_AllocateFromMetaspaceTestArena},
3194   {CC"deallocateToMetaspaceTestArena", CC"(JJJ)V",    (void*)&WB_DeallocateToMetaspaceTestArena},
3195   {CC"maxMetaspaceAllocationSize", CC"()J",           (void*)&WB_GetMaxMetaspaceAllocationSize},
3196 
3197   {CC"isJVMTIIncluded", CC"()Z",                      (void*)&WB_IsJVMTIIncluded},
3198   {CC"waitUnsafe", CC"(I)V",                          (void*)&WB_WaitUnsafe},
3199   {CC"busyWaitCPUTime", CC"(I)V",                     (void*)&WB_BusyWaitCPUTime},
3200   {CC"cpuSamplerSetOutOfStackWalking", CC"(Z)Z",      (void*)&WB_CPUSamplerSetOutOfStackWalking},
3201   {CC"getLibcName",     CC"()Ljava/lang/String;",     (void*)&WB_GetLibcName},
3202 
3203   {CC"pinObject",       CC"(Ljava/lang/Object;)V",    (void*)&WB_PinObject},
3204   {CC"unpinObject",     CC"(Ljava/lang/Object;)V",    (void*)&WB_UnpinObject},
3205   {CC"setVirtualThreadsNotifyJvmtiMode", CC"(Z)Z",    (void*)&WB_SetVirtualThreadsNotifyJvmtiMode},
3206   {CC"preTouchMemory",  CC"(JJ)V",                    (void*)&WB_PreTouchMemory},
3207   {CC"cleanMetaspaces", CC"()V",                      (void*)&WB_CleanMetaspaces},
3208   {CC"rss", CC"()J",                                  (void*)&WB_Rss},
3209   {CC"printString", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_PrintString},
3210   {CC"lockAndStuckInSafepoint", CC"()V", (void*)&WB_TakeLockAndHangInSafepoint},
3211   {CC"wordSize", CC"()J",                             (void*)&WB_WordSize},
3212   {CC"rootChunkWordSize", CC"()J",                    (void*)&WB_RootChunkWordSize},
3213   {CC"isStatic", CC"()Z",                             (void*)&WB_IsStaticallyLinked},
3214   {CC"controlledCrash",CC"(I)V",                      (void*)&WB_ControlledCrash},
3215 };
3216 
3217 #undef CC
3218 
3219 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
3220   {
3221     if (WhiteBoxAPI) {
3222       // Make sure that wbclass is loaded by the null classloader
3223       InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(wbclass));
3224       Handle loader(THREAD, ik->class_loader());
3225       if (loader.is_null()) {
3226         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
3227         WhiteBox::set_used();
3228       }
3229     }
3230   }
3231 JVM_END