1 /*
   2  * Copyright (c) 2012, 2024, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "cds.h"
  27 #include "cds/archiveHeapLoader.hpp"
  28 #include "cds/cdsConstants.hpp"
  29 #include "cds/filemap.hpp"
  30 #include "cds/heapShared.hpp"
  31 #include "cds/metaspaceShared.hpp"
  32 #include "classfile/classLoader.hpp"
  33 #include "classfile/classLoaderDataGraph.hpp"
  34 #include "classfile/classLoaderStats.hpp"
  35 #include "classfile/classPrinter.hpp"
  36 #include "classfile/javaClasses.inline.hpp"
  37 #include "classfile/modules.hpp"
  38 #include "classfile/protectionDomainCache.hpp"
  39 #include "classfile/stringTable.hpp"
  40 #include "classfile/symbolTable.hpp"
  41 #include "classfile/systemDictionary.hpp"
  42 #include "classfile/vmSymbols.hpp"
  43 #include "code/codeCache.hpp"
  44 #include "compiler/compilationPolicy.hpp"
  45 #include "compiler/compilerOracle.hpp"
  46 #include "compiler/directivesParser.hpp"
  47 #include "compiler/methodMatcher.hpp"
  48 #include "gc/shared/concurrentGCBreakpoints.hpp"
  49 #include "gc/shared/gcConfig.hpp"
  50 #include "gc/shared/gcLocker.inline.hpp"
  51 #include "gc/shared/genArguments.hpp"
  52 #include "jvmtifiles/jvmtiEnv.hpp"
  53 #include "logging/log.hpp"
  54 #include "memory/iterator.hpp"
  55 #include "memory/metadataFactory.hpp"
  56 #include "memory/metaspace/testHelpers.hpp"
  57 #include "memory/metaspaceUtils.hpp"
  58 #include "memory/oopFactory.hpp"
  59 #include "memory/resourceArea.hpp"
  60 #include "memory/universe.hpp"
  61 #include "nmt/mallocSiteTable.hpp"
  62 #include "nmt/memTracker.hpp"
  63 #include "oops/array.hpp"
  64 #include "oops/compressedOops.hpp"
  65 #include "oops/constantPool.inline.hpp"
  66 #include "oops/klass.inline.hpp"
  67 #include "oops/method.inline.hpp"
  68 #include "oops/methodData.inline.hpp"
  69 #include "oops/objArrayKlass.hpp"
  70 #include "oops/objArrayOop.inline.hpp"
  71 #include "oops/oop.inline.hpp"
  72 #include "oops/typeArrayOop.inline.hpp"
  73 #include "prims/jvmtiEnvBase.hpp"
  74 #include "prims/resolvedMethodTable.hpp"
  75 #include "prims/wbtestmethods/parserTests.hpp"
  76 #include "prims/whitebox.inline.hpp"
  77 #include "runtime/arguments.hpp"
  78 #include "runtime/atomic.hpp"
  79 #include "runtime/deoptimization.hpp"
  80 #include "runtime/fieldDescriptor.inline.hpp"
  81 #include "runtime/flags/jvmFlag.hpp"
  82 #include "runtime/flags/jvmFlagAccess.hpp"
  83 #include "runtime/frame.inline.hpp"
  84 #include "runtime/handles.inline.hpp"
  85 #include "runtime/handshake.hpp"
  86 #include "runtime/interfaceSupport.inline.hpp"
  87 #include "runtime/javaCalls.hpp"
  88 #include "runtime/javaThread.inline.hpp"
  89 #include "runtime/jniHandles.inline.hpp"
  90 #include "runtime/lockStack.hpp"
  91 #include "runtime/os.hpp"
  92 #include "runtime/stackFrameStream.inline.hpp"
  93 #include "runtime/synchronizer.hpp"
  94 #include "runtime/threadSMR.hpp"
  95 #include "runtime/vframe.hpp"
  96 #include "runtime/vm_version.hpp"
  97 #include "services/memoryService.hpp"
  98 #include "utilities/align.hpp"
  99 #include "utilities/checkedCast.hpp"
 100 #include "utilities/debug.hpp"
 101 #include "utilities/elfFile.hpp"
 102 #include "utilities/exceptions.hpp"
 103 #include "utilities/macros.hpp"
 104 #include "utilities/nativeCallStack.hpp"
 105 #include "utilities/ostream.hpp"
 106 #if INCLUDE_G1GC
 107 #include "gc/g1/g1Arguments.hpp"
 108 #include "gc/g1/g1CollectedHeap.inline.hpp"
 109 #include "gc/g1/g1ConcurrentMark.hpp"
 110 #include "gc/g1/g1ConcurrentMarkThread.inline.hpp"
 111 #include "gc/g1/g1HeapRegionManager.hpp"
 112 #include "gc/g1/g1HeapRegionRemSet.inline.hpp"
 113 #endif // INCLUDE_G1GC
 114 #if INCLUDE_PARALLELGC
 115 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
 116 #endif // INCLUDE_PARALLELGC
 117 #if INCLUDE_SERIALGC
 118 #include "gc/serial/serialHeap.hpp"
 119 #endif // INCLUDE_SERIALGC
 120 #if INCLUDE_ZGC
 121 #include "gc/z/zAddress.inline.hpp"
 122 #endif // INCLUDE_ZGC
 123 #if INCLUDE_JVMCI
 124 #include "jvmci/jvmciEnv.hpp"
 125 #include "jvmci/jvmciRuntime.hpp"
 126 #endif
 127 #ifdef LINUX
 128 #include "cgroupSubsystem_linux.hpp"
 129 #include "osContainer_linux.hpp"
 130 #include "os_linux.hpp"
 131 #endif
 132 
 133 #define CHECK_JNI_EXCEPTION_(env, value)                               \
 134   do {                                                                 \
 135     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
 136     THREAD->clear_pending_jni_exception_check();                       \
 137     if (HAS_PENDING_EXCEPTION) {                                       \
 138       return(value);                                                   \
 139     }                                                                  \
 140   } while (0)
 141 
 142 #define CHECK_JNI_EXCEPTION(env)                                       \
 143   do {                                                                 \
 144     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
 145     THREAD->clear_pending_jni_exception_check();                       \
 146     if (HAS_PENDING_EXCEPTION) {                                       \
 147       return;                                                          \
 148     }                                                                  \
 149   } while (0)
 150 
 151 bool WhiteBox::_used = false;
 152 volatile bool WhiteBox::compilation_locked = false;
 153 
 154 class VM_WhiteBoxOperation : public VM_Operation {
 155  public:
 156   VM_WhiteBoxOperation()                         { }
 157   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
 158   bool allow_nested_vm_operations() const        { return true; }
 159 };
 160 
 161 
 162 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
 163   return (jlong)(void*)JNIHandles::resolve(obj);
 164 WB_END
 165 
 166 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
 167   return heapOopSize;
 168 WB_END
 169 
 170 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
 171   return (jint)os::vm_page_size();
 172 WB_END
 173 
 174 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
 175   return os::vm_allocation_granularity();
 176 WB_END
 177 
 178 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
 179   return os::large_page_size();
 180 WB_END
 181 
 182 WB_ENTRY(jstring, WB_PrintString(JNIEnv* env, jobject wb, jstring str, jint max_length))
 183   ResourceMark rm(THREAD);
 184   stringStream sb;
 185   java_lang_String::print(JNIHandles::resolve(str), &sb, max_length);
 186   oop result = java_lang_String::create_oop_from_str(sb.as_string(), THREAD);
 187   return (jstring) JNIHandles::make_local(THREAD, result);
 188 WB_END
 189 
 190 class WBIsKlassAliveClosure : public LockedClassesDo {
 191     Symbol* _name;
 192     int _count;
 193 public:
 194     WBIsKlassAliveClosure(Symbol* name) : _name(name), _count(0) {}
 195 
 196     void do_klass(Klass* k) {
 197       Symbol* ksym = k->name();
 198       if (ksym->fast_compare(_name) == 0) {
 199         _count++;
 200       } else if (k->is_instance_klass()) {
 201         // Need special handling for hidden classes because the JVM
 202         // appends "+<hex-address>" to hidden class names.
 203         InstanceKlass *ik = InstanceKlass::cast(k);
 204         if (ik->is_hidden()) {
 205           ResourceMark rm;
 206           char* k_name = ksym->as_C_string();
 207           // Find the first '+' char and truncate the string at that point.
 208           // NOTE: This will not work correctly if the original hidden class
 209           // name contains a '+'.
 210           char* plus_char = strchr(k_name, '+');
 211           if (plus_char != nullptr) {
 212             *plus_char = 0;
 213             char* c_name = _name->as_C_string();
 214             if (strcmp(c_name, k_name) == 0) {
 215               _count++;
 216             }
 217           }
 218         }
 219       }
 220     }
 221 
 222     int count() const {
 223         return _count;
 224     }
 225 };
 226 
 227 WB_ENTRY(jint, WB_CountAliveClasses(JNIEnv* env, jobject target, jstring name))
 228   oop h_name = JNIHandles::resolve(name);
 229   if (h_name == nullptr) {
 230     return 0;
 231   }
 232   Symbol* sym = java_lang_String::as_symbol(h_name);
 233   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 234 
 235   WBIsKlassAliveClosure closure(sym);
 236   ClassLoaderDataGraph::classes_do(&closure);
 237 
 238   // Return the count of alive classes with this name.
 239   return closure.count();
 240 WB_END
 241 
 242 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
 243   oop h_name = JNIHandles::resolve(name);
 244   if (h_name == nullptr) {
 245     return 0;
 246   }
 247   Symbol* sym = java_lang_String::as_symbol(h_name);
 248   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 249   return (jint)sym->refcount();
 250 WB_END
 251 
 252 
 253 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 254 #if INCLUDE_JVMTI
 255   ResourceMark rm;
 256   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 257   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 258   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 259   assert(err == JVMTI_ERROR_NONE, "must not fail");
 260 #endif
 261 }
 262 WB_END
 263 
 264 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 265 #if INCLUDE_JVMTI
 266   ResourceMark rm;
 267   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 268   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 269   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 270   assert(err == JVMTI_ERROR_NONE, "must not fail");
 271 #endif
 272 }
 273 WB_END
 274 
 275 
 276 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 277   return (jlong)Arguments::max_heap_for_compressed_oops();
 278 }
 279 WB_END
 280 
 281 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 282   tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap " SIZE_FORMAT " "
 283                 "Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
 284                 MinHeapSize,
 285                 InitialHeapSize,
 286                 MaxHeapSize,
 287                 SpaceAlignment,
 288                 HeapAlignment);
 289 }
 290 WB_END
 291 
 292 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 293   size_t granularity = os::vm_allocation_granularity();
 294   ReservedHeapSpace rhs(100 * granularity, granularity, os::vm_page_size());
 295   VirtualSpace vs;
 296   vs.initialize(rhs, 50 * granularity);
 297 
 298   // Check if constraints are complied
 299   if (!( UseCompressedOops && rhs.base() != nullptr &&
 300          CompressedOops::base() != nullptr &&
 301          CompressedOops::use_implicit_null_checks() )) {
 302     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 303                   "\tUseCompressedOops is %d\n"
 304                   "\trhs.base() is " PTR_FORMAT "\n"
 305                   "\tCompressedOops::base() is " PTR_FORMAT "\n"
 306                   "\tCompressedOops::use_implicit_null_checks() is %d",
 307                   UseCompressedOops,
 308                   p2i(rhs.base()),
 309                   p2i(CompressedOops::base()),
 310                   CompressedOops::use_implicit_null_checks());
 311     return;
 312   }
 313   tty->print_cr("Reading from no access area... ");
 314   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 315                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 316 WB_END
 317 
 318 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 319                                            size_t magnitude, size_t iterations) {
 320   size_t granularity = os::vm_allocation_granularity();
 321   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, os::vm_page_size());
 322   VirtualSpace vs;
 323   if (!vs.initialize(rhs, 0)) {
 324     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 325     return 3;
 326   }
 327 
 328   int seed = os::random();
 329   tty->print_cr("Random seed is %d", seed);
 330 
 331   for (size_t i = 0; i < iterations; i++) {
 332 
 333     // Whether we will shrink or grow
 334     bool shrink = os::random() % 2L == 0;
 335 
 336     // Get random delta to resize virtual space
 337     size_t delta = (size_t)os::random() % magnitude;
 338 
 339     // If we are about to shrink virtual space below zero, then expand instead
 340     if (shrink && vs.committed_size() < delta) {
 341       shrink = false;
 342     }
 343 
 344     // Resizing by delta
 345     if (shrink) {
 346       vs.shrink_by(delta);
 347     } else {
 348       // If expanding fails expand_by will silently return false
 349       vs.expand_by(delta, true);
 350     }
 351   }
 352   return 0;
 353 }
 354 
 355 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 356         jlong reserved_space_size, jlong magnitude, jlong iterations))
 357   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 358                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 359                 iterations);
 360   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 361     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 362     return 1;
 363   }
 364 
 365   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 366   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 367   if (sizeof(size_t) < sizeof(jlong)) {
 368     jlong size_t_max_value = (jlong)SIZE_MAX;
 369     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 370         || iterations > size_t_max_value) {
 371       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 372       return 2;
 373     }
 374   }
 375 
 376   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 377                                         (size_t) magnitude, (size_t) iterations);
 378 WB_END
 379 
 380 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
 381   return GCConfig::is_gc_supported((CollectedHeap::Name)name);
 382 WB_END
 383 
 384 WB_ENTRY(jboolean, WB_HasLibgraal(JNIEnv* env, jobject o))
 385 #if INCLUDE_JVMCI
 386   return JVMCI::shared_library_exists();
 387 #endif
 388   return false;
 389 WB_END
 390 
 391 WB_ENTRY(jboolean, WB_IsGCSupportedByJVMCICompiler(JNIEnv* env, jobject o, jint name))
 392 #if INCLUDE_JVMCI
 393   if (EnableJVMCI) {
 394     // Enter the JVMCI env that will be used by the CompileBroker.
 395     JVMCIEnv jvmciEnv(thread, __FILE__, __LINE__);
 396     return jvmciEnv.init_error() == JNI_OK && jvmciEnv.runtime()->is_gc_supported(&jvmciEnv, (CollectedHeap::Name)name);
 397   }
 398 #endif
 399   return false;
 400 WB_END
 401 
 402 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
 403   return GCConfig::is_gc_selected((CollectedHeap::Name)name);
 404 WB_END
 405 
 406 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
 407   return GCConfig::is_gc_selected_ergonomically();
 408 WB_END
 409 
 410 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 411   oop p = JNIHandles::resolve(obj);
 412 #if INCLUDE_G1GC
 413   if (UseG1GC) {
 414     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 415     const G1HeapRegion* hr = g1h->heap_region_containing(p);
 416     return hr->is_old_or_humongous();
 417   }
 418 #endif
 419 #if INCLUDE_PARALLELGC
 420   if (UseParallelGC) {
 421     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 422     return !psh->is_in_young(p);
 423   }
 424 #endif
 425 #if INCLUDE_ZGC
 426   if (UseZGC) {
 427     if (ZGenerational) {
 428       return ZHeap::heap()->is_old(to_zaddress(p));
 429     } else {
 430       return Universe::heap()->is_in(p);
 431     }
 432   }
 433 #endif
 434 #if INCLUDE_SHENANDOAHGC
 435   if (UseShenandoahGC) {
 436     return Universe::heap()->is_in(p);
 437   }
 438 #endif
 439 #if INCLUDE_SERIALGC
 440   if (UseSerialGC) {
 441     return !SerialHeap::heap()->is_in_young(p);
 442   }
 443 #endif
 444   ShouldNotReachHere();
 445   return false;
 446 WB_END
 447 
 448 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 449   oop p = JNIHandles::resolve(obj);
 450   return p->size() * HeapWordSize;
 451 WB_END
 452 
 453 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 454   return (jlong)SpaceAlignment;
 455 WB_END
 456 
 457 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
 458   return (jlong)HeapAlignment;
 459 WB_END
 460 
 461 WB_ENTRY(jboolean, WB_SupportsConcurrentGCBreakpoints(JNIEnv* env, jobject o))
 462   return Universe::heap()->supports_concurrent_gc_breakpoints();
 463 WB_END
 464 
 465 WB_ENTRY(void, WB_ConcurrentGCAcquireControl(JNIEnv* env, jobject o))
 466   ConcurrentGCBreakpoints::acquire_control();
 467 WB_END
 468 
 469 WB_ENTRY(void, WB_ConcurrentGCReleaseControl(JNIEnv* env, jobject o))
 470   ConcurrentGCBreakpoints::release_control();
 471 WB_END
 472 
 473 WB_ENTRY(void, WB_ConcurrentGCRunToIdle(JNIEnv* env, jobject o))
 474   ConcurrentGCBreakpoints::run_to_idle();
 475 WB_END
 476 
 477 WB_ENTRY(jboolean, WB_ConcurrentGCRunTo(JNIEnv* env, jobject o, jobject at))
 478   Handle h_name(THREAD, JNIHandles::resolve(at));
 479   ResourceMark rm;
 480   const char* c_name = java_lang_String::as_utf8_string(h_name());
 481   return ConcurrentGCBreakpoints::run_to(c_name);
 482 WB_END
 483 
 484 #if INCLUDE_G1GC
 485 
 486 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 487   if (UseG1GC) {
 488     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 489     oop result = JNIHandles::resolve(obj);
 490     const G1HeapRegion* hr = g1h->heap_region_containing(result);
 491     return hr->is_humongous();
 492   }
 493   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
 494 WB_END
 495 
 496 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 497   if (UseG1GC) {
 498     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 499     const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
 500     return hr->is_humongous();
 501   }
 502   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
 503 WB_END
 504 
 505 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 506   if (UseG1GC) {
 507     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 508     const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
 509     return hr->is_free();
 510   }
 511   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
 512 WB_END
 513 
 514 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 515   if (UseG1GC) {
 516     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 517     size_t nr = g1h->max_regions();
 518     return (jlong)nr;
 519   }
 520   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
 521 WB_END
 522 
 523 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 524   if (UseG1GC) {
 525     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 526     size_t nr = g1h->num_free_regions();
 527     return (jlong)nr;
 528   }
 529   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
 530 WB_END
 531 
 532 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 533   if (UseG1GC) {
 534     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 535     return g1h->concurrent_mark()->cm_thread()->in_progress();
 536   }
 537   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
 538 WB_END
 539 
 540 WB_ENTRY(jint, WB_G1CompletedConcurrentMarkCycles(JNIEnv* env, jobject o))
 541   if (UseG1GC) {
 542     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 543     G1ConcurrentMark* cm = g1h->concurrent_mark();
 544     return cm->completed_mark_cycles();
 545   }
 546   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1CompletedConcurrentMarkCycles: G1 GC is not enabled");
 547 WB_END
 548 
 549 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 550   if (UseG1GC) {
 551     return (jint)G1HeapRegion::GrainBytes;
 552   }
 553   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
 554 WB_END
 555 
 556 WB_ENTRY(jboolean, WB_G1HasRegionsToUncommit(JNIEnv* env, jobject o))
 557   if (UseG1GC) {
 558     return G1CollectedHeap::heap()->has_uncommittable_regions();
 559   }
 560   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1HasRegionsToUncommit: G1 GC is not enabled");
 561 WB_END
 562 
 563 #endif // INCLUDE_G1GC
 564 
 565 #if INCLUDE_PARALLELGC
 566 
 567 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
 568   if (UseParallelGC) {
 569     return GenAlignment;
 570   }
 571   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
 572 WB_END
 573 
 574 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
 575   if (UseParallelGC) {
 576     return GenAlignment;
 577   }
 578   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
 579 WB_END
 580 
 581 #endif // INCLUDE_PARALLELGC
 582 
 583 #if INCLUDE_G1GC
 584 
 585 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 586   if (UseG1GC) {
 587     ResourceMark rm(THREAD);
 588     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 589     MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 590     Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 591     return JNIHandles::make_local(THREAD, h());
 592   }
 593   THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
 594 WB_END
 595 
 596 WB_ENTRY(jint, WB_G1ActiveMemoryNodeCount(JNIEnv* env, jobject o))
 597   if (UseG1GC) {
 598     G1NUMA* numa = G1NUMA::numa();
 599     return (jint)numa->num_active_nodes();
 600   }
 601   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1ActiveMemoryNodeCount: G1 GC is not enabled");
 602 WB_END
 603 
 604 WB_ENTRY(jintArray, WB_G1MemoryNodeIds(JNIEnv* env, jobject o))
 605   if (UseG1GC) {
 606     G1NUMA* numa = G1NUMA::numa();
 607     int num_node_ids = checked_cast<int>(numa->num_active_nodes());
 608     const uint* node_ids = numa->node_ids();
 609 
 610     typeArrayOop result = oopFactory::new_intArray(num_node_ids, CHECK_NULL);
 611     for (int i = 0; i < num_node_ids; i++) {
 612       result->int_at_put(i, checked_cast<jint>(node_ids[i]));
 613     }
 614     return (jintArray) JNIHandles::make_local(THREAD, result);
 615   }
 616   THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1MemoryNodeIds: G1 GC is not enabled");
 617 WB_END
 618 
 619 class OldRegionsLivenessClosure: public G1HeapRegionClosure {
 620 
 621  private:
 622   const int _liveness;
 623   size_t _total_count;
 624   size_t _total_memory;
 625   size_t _total_memory_to_free;
 626 
 627  public:
 628   OldRegionsLivenessClosure(int liveness) :
 629     _liveness(liveness),
 630     _total_count(0),
 631     _total_memory(0),
 632     _total_memory_to_free(0) { }
 633 
 634     size_t total_count() { return _total_count; }
 635     size_t total_memory() { return _total_memory; }
 636     size_t total_memory_to_free() { return _total_memory_to_free; }
 637 
 638   bool do_heap_region(G1HeapRegion* r) {
 639     if (r->is_old()) {
 640       size_t live = r->live_bytes();
 641       size_t size = r->used();
 642       size_t reg_size = G1HeapRegion::GrainBytes;
 643       if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
 644         _total_memory += size;
 645         ++_total_count;
 646         if (size == reg_size) {
 647           // We don't include non-full regions since they are unlikely included in mixed gc
 648           // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
 649           _total_memory_to_free += size - live;
 650         }
 651       }
 652     }
 653     return false;
 654   }
 655 };
 656 
 657 
 658 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
 659   if (!UseG1GC) {
 660     THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
 661   }
 662   if (liveness < 0) {
 663     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
 664   }
 665 
 666   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 667   OldRegionsLivenessClosure rli(liveness);
 668   g1h->heap_region_iterate(&rli);
 669 
 670   typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
 671   result->long_at_put(0, rli.total_count());
 672   result->long_at_put(1, rli.total_memory());
 673   result->long_at_put(2, rli.total_memory_to_free());
 674   return (jlongArray) JNIHandles::make_local(THREAD, result);
 675 WB_END
 676 
 677 #endif // INCLUDE_G1GC
 678 
 679 // Alloc memory using the test memory tag so that we can use that to see if
 680 // NMT picks it up correctly
 681 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 682   jlong addr = 0;
 683   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 684   return addr;
 685 WB_END
 686 
 687 // Alloc memory with pseudo call stack. The test can create pseudo malloc
 688 // allocation site to stress the malloc tracking.
 689 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 690   address pc = (address)(size_t)pseudo_stack;
 691   NativeCallStack stack(&pc, 1);
 692   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 693 WB_END
 694 
 695 // Alloc memory with pseudo call stack and specific memory tag.
 696 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint mem_tag))
 697   address pc = (address)(size_t)pseudo_stack;
 698   NativeCallStack stack(&pc, 1);
 699   return (jlong)(uintptr_t)os::malloc(size, (MemTag)mem_tag, stack);
 700 WB_END
 701 
 702 // Free the memory allocated by NMTAllocTest
 703 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 704   os::free((void*)(uintptr_t)mem);
 705 WB_END
 706 
 707 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 708   jlong addr = 0;
 709 
 710   addr = (jlong)(uintptr_t)os::reserve_memory(size);
 711   MemTracker::record_virtual_memory_tag((address)addr, mtTest);
 712 
 713   return addr;
 714 WB_END
 715 
 716 WB_ENTRY(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
 717   addr = (jlong)(uintptr_t)os::attempt_reserve_memory_at((char*)(uintptr_t)addr, (size_t)size);
 718   MemTracker::record_virtual_memory_tag((address)addr, mtTest);
 719 
 720   return addr;
 721 WB_END
 722 
 723 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 724   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 725   MemTracker::record_virtual_memory_tag((address)(uintptr_t)addr, mtTest);
 726 WB_END
 727 
 728 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 729   os::uncommit_memory((char *)(uintptr_t)addr, size);
 730 WB_END
 731 
 732 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 733   os::release_memory((char *)(uintptr_t)addr, size);
 734 WB_END
 735 
 736 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 737   int hash_size = MallocSiteTable::hash_buckets();
 738   assert(hash_size > 0, "NMT hash_size should be > 0");
 739   return (jint)hash_size;
 740 WB_END
 741 
 742 WB_ENTRY(jlong, WB_NMTNewArena(JNIEnv* env, jobject o, jlong init_size))
 743   Arena* arena =  new (mtTest) Arena(mtTest, Arena::Tag::tag_other, size_t(init_size));
 744   return (jlong)arena;
 745 WB_END
 746 
 747 WB_ENTRY(void, WB_NMTFreeArena(JNIEnv* env, jobject o, jlong arena))
 748   Arena* a = (Arena*)arena;
 749   delete a;
 750 WB_END
 751 
 752 WB_ENTRY(void, WB_NMTArenaMalloc(JNIEnv* env, jobject o, jlong arena, jlong size))
 753   Arena* a = (Arena*)arena;
 754   a->Amalloc(size_t(size));
 755 WB_END
 756 
 757 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 758   assert(method != nullptr, "method should not be null");
 759   ThreadToNativeFromVM ttn(thread);
 760   return env->FromReflectedMethod(method);
 761 }
 762 
 763 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 764 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 765  private:
 766   int _result;
 767   const bool _make_not_entrant;
 768  public:
 769   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 770         _result(0), _make_not_entrant(make_not_entrant) { }
 771   int  result() const { return _result; }
 772 
 773   void doit() {
 774     for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
 775       if (t->has_last_Java_frame()) {
 776         for (StackFrameStream fst(t, false /* update */, true /* process_frames */); !fst.is_done(); fst.next()) {
 777           frame* f = fst.current();
 778           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 779             Deoptimization::deoptimize(t, *f);
 780             if (_make_not_entrant) {
 781                 nmethod* nm = CodeCache::find_nmethod(f->pc());
 782                 assert(nm != nullptr, "did not find nmethod");
 783                 nm->make_not_entrant();
 784             }
 785             ++_result;
 786           }
 787         }
 788       }
 789     }
 790   }
 791 };
 792 
 793 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 794   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 795   VMThread::execute(&op);
 796   return op.result();
 797 WB_END
 798 
 799 WB_ENTRY(jboolean, WB_IsFrameDeoptimized(JNIEnv* env, jobject o, jint depth))
 800   bool result = false;
 801   if (thread->has_last_Java_frame()) {
 802     ResourceMark rm(THREAD);
 803     RegisterMap reg_map(thread,
 804                         RegisterMap::UpdateMap::include,
 805                         RegisterMap::ProcessFrames::include,
 806                         RegisterMap::WalkContinuation::skip);
 807     javaVFrame *jvf = thread->last_java_vframe(&reg_map);
 808     for (jint d = 0; d < depth && jvf != nullptr; d++) {
 809       jvf = jvf->java_sender();
 810     }
 811     result = jvf != nullptr && jvf->fr().is_deoptimized_frame();
 812   }
 813   return result;
 814 WB_END
 815 
 816 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 817   DeoptimizationScope deopt_scope;
 818   CodeCache::mark_all_nmethods_for_deoptimization(&deopt_scope);
 819   deopt_scope.deoptimize_marked();
 820 WB_END
 821 
 822 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 823   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 824   int result = 0;
 825   CHECK_JNI_EXCEPTION_(env, result);
 826 
 827   DeoptimizationScope deopt_scope;
 828   {
 829     MutexLocker mu(Compile_lock);
 830     methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 831     if (is_osr) {
 832       result += mh->method_holder()->mark_osr_nmethods(&deopt_scope, mh());
 833     } else {
 834       MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
 835       if (mh->code() != nullptr) {
 836         deopt_scope.mark(mh->code());
 837         ++result;
 838       }
 839     }
 840     CodeCache::mark_for_deoptimization(&deopt_scope, mh());
 841   }
 842 
 843   deopt_scope.deoptimize_marked();
 844 
 845   return result;
 846 WB_END
 847 
 848 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 849   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 850   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 851   MutexLocker mu(Compile_lock);
 852   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 853   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 854   if (code == nullptr) {
 855     return JNI_FALSE;
 856   }
 857   return !code->is_marked_for_deoptimization();
 858 WB_END
 859 
 860 static bool is_excluded_for_compiler(AbstractCompiler* comp, methodHandle& mh) {
 861   if (comp == nullptr) {
 862     return true;
 863   }
 864   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
 865   bool exclude = directive->ExcludeOption;
 866   DirectivesStack::release(directive);
 867   return exclude;
 868 }
 869 
 870 static bool can_be_compiled_at_level(methodHandle& mh, jboolean is_osr, int level) {
 871   if (is_osr) {
 872     return CompilationPolicy::can_be_osr_compiled(mh, level);
 873   } else {
 874     return CompilationPolicy::can_be_compiled(mh, level);
 875   }
 876 }
 877 
 878 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 879   if (method == nullptr || comp_level > CompilationPolicy::highest_compile_level()) {
 880     return false;
 881   }
 882   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 883   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 884   MutexLocker mu(Compile_lock);
 885   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 886 
 887   // The ExcludeOption directive is evaluated lazily upon compilation attempt. If a method was not tried to be compiled by
 888   // a compiler, yet, the method object is not set to be not compilable by that compiler. Thus, evaluate the compiler directive
 889   // to exclude a compilation of 'method'.
 890   if (comp_level == CompLevel_any) {
 891     // Both compilers could have ExcludeOption set. Check all combinations.
 892     bool excluded_c1 = is_excluded_for_compiler(CompileBroker::compiler1(), mh);
 893     bool excluded_c2 = is_excluded_for_compiler(CompileBroker::compiler2(), mh);
 894     if (excluded_c1 && excluded_c2) {
 895       // Compilation of 'method' excluded by both compilers.
 896       return false;
 897     }
 898 
 899     if (excluded_c1) {
 900       // C1 only has ExcludeOption set: Check if compilable with C2.
 901       return can_be_compiled_at_level(mh, is_osr, CompLevel_full_optimization);
 902     } else if (excluded_c2) {
 903       // C2 only has ExcludeOption set: Check if compilable with C1.
 904       return can_be_compiled_at_level(mh, is_osr, CompLevel_simple);
 905     }
 906   } else if (comp_level > CompLevel_none && is_excluded_for_compiler(CompileBroker::compiler((int)comp_level), mh)) {
 907     // Compilation of 'method' excluded by compiler used for 'comp_level'.
 908     return false;
 909   }
 910 
 911   return can_be_compiled_at_level(mh, is_osr, (int)comp_level);
 912 WB_END
 913 
 914 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 915   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 916   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 917   MutexLocker mu(Compile_lock);
 918   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 919   return mh->queued_for_compilation();
 920 WB_END
 921 
 922 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 923   if (compLevel < CompLevel_none || compLevel > CompilationPolicy::highest_compile_level()) {
 924     return false; // Intrinsic is not available on a non-existent compilation level.
 925   }
 926   jmethodID method_id, compilation_context_id;
 927   method_id = reflected_method_to_jmid(thread, env, method);
 928   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 929   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 930 
 931   DirectiveSet* directive;
 932   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 933   assert(comp != nullptr, "compiler not available");
 934   if (compilation_context != nullptr) {
 935     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 936     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 937     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 938     directive = DirectivesStack::getMatchingDirective(cch, comp);
 939   } else {
 940     // Calling with null matches default directive
 941     directive = DirectivesStack::getDefaultDirective(comp);
 942   }
 943   bool result = comp->is_intrinsic_available(mh, directive);
 944   DirectivesStack::release(directive);
 945   return result;
 946 WB_END
 947 
 948 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 949   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 950   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 951   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 952   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 953   return (code != nullptr ? code->comp_level() : CompLevel_none);
 954 WB_END
 955 
 956 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 957   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 958   CHECK_JNI_EXCEPTION(env);
 959   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 960   if (is_osr) {
 961     mh->set_not_osr_compilable("WhiteBox", comp_level);
 962   } else {
 963     mh->set_not_compilable("WhiteBox", comp_level);
 964   }
 965 WB_END
 966 
 967 WB_ENTRY(jint, WB_GetMethodDecompileCount(JNIEnv* env, jobject o, jobject method))
 968   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 969   CHECK_JNI_EXCEPTION_(env, 0);
 970   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 971   uint cnt = 0;
 972   MethodData* mdo = mh->method_data();
 973   if (mdo != nullptr) {
 974     cnt = mdo->decompile_count();
 975   }
 976   return cnt;
 977 WB_END
 978 
 979 // Get the trap count of a method for a specific reason. If the trap count for
 980 // that reason did overflow, this includes the overflow trap count of the method.
 981 // If 'reason' is null, the sum of the traps for all reasons will be returned.
 982 // This number includes the overflow trap count if the trap count for any reason
 983 // did overflow.
 984 WB_ENTRY(jint, WB_GetMethodTrapCount(JNIEnv* env, jobject o, jobject method, jstring reason_obj))
 985   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 986   CHECK_JNI_EXCEPTION_(env, 0);
 987   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 988   uint cnt = 0;
 989   MethodData* mdo = mh->method_data();
 990   if (mdo != nullptr) {
 991     ResourceMark rm(THREAD);
 992     char* reason_str = (reason_obj == nullptr) ?
 993       nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
 994     bool overflow = false;
 995     for (uint reason = 0; reason < mdo->trap_reason_limit(); reason++) {
 996       if (reason_str != nullptr && !strcmp(reason_str, Deoptimization::trap_reason_name(reason))) {
 997         cnt = mdo->trap_count(reason);
 998         // Count in the overflow trap count on overflow
 999         if (cnt == (uint)-1) {
1000           cnt = mdo->trap_count_limit() + mdo->overflow_trap_count();
1001         }
1002         break;
1003       } else if (reason_str == nullptr) {
1004         uint c = mdo->trap_count(reason);
1005         if (c == (uint)-1) {
1006           c = mdo->trap_count_limit();
1007           if (!overflow) {
1008             // Count overflow trap count just once
1009             overflow = true;
1010             c += mdo->overflow_trap_count();
1011           }
1012         }
1013         cnt += c;
1014       }
1015     }
1016   }
1017   return cnt;
1018 WB_END
1019 
1020 WB_ENTRY(jint, WB_GetDeoptCount(JNIEnv* env, jobject o, jstring reason_obj, jstring action_obj))
1021   if (reason_obj == nullptr && action_obj == nullptr) {
1022     return Deoptimization::total_deoptimization_count();
1023   }
1024   ResourceMark rm(THREAD);
1025   const char *reason_str = (reason_obj == nullptr) ?
1026     nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1027   const char *action_str = (action_obj == nullptr) ?
1028     nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(action_obj));
1029 
1030   return Deoptimization::deoptimization_count(reason_str, action_str);
1031 WB_END
1032 
1033 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
1034   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1035   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
1036   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1037   nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
1038   return (code != nullptr && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
1039 WB_END
1040 
1041 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1042   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1043   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1044   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1045   bool result = mh->dont_inline();
1046   mh->set_dont_inline(value == JNI_TRUE);
1047   return result;
1048 WB_END
1049 
1050 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
1051   if (comp_level == CompLevel_any) {
1052     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
1053         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
1054   } else {
1055     return CompileBroker::queue_size(comp_level);
1056   }
1057 WB_END
1058 
1059 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1060   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1061   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1062   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1063   bool result = mh->force_inline();
1064   mh->set_force_inline(value == JNI_TRUE);
1065   return result;
1066 WB_END
1067 
1068 #ifdef LINUX
1069 bool WhiteBox::validate_cgroup(const char* proc_cgroups,
1070                                const char* proc_self_cgroup,
1071                                const char* proc_self_mountinfo,
1072                                u1* cg_flags) {
1073   CgroupInfo cg_infos[CG_INFO_LENGTH];
1074   return CgroupSubsystemFactory::determine_type(cg_infos, proc_cgroups,
1075                                                     proc_self_cgroup,
1076                                                     proc_self_mountinfo, cg_flags);
1077 }
1078 #endif
1079 
1080 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, JavaThread* THREAD) {
1081   // Screen for unavailable/bad comp level or null method
1082   AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1083   if (method == nullptr) {
1084     tty->print_cr("WB error: request to compile null method");
1085     return false;
1086   }
1087   if (comp_level > CompilationPolicy::highest_compile_level()) {
1088     tty->print_cr("WB error: invalid compilation level %d", comp_level);
1089     return false;
1090   }
1091   if (comp == nullptr) {
1092     tty->print_cr("WB error: no compiler for requested compilation level %d", comp_level);
1093     return false;
1094   }
1095 
1096   // Check if compilation is blocking
1097   methodHandle mh(THREAD, method);
1098   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
1099   bool is_blocking = !directive->BackgroundCompilationOption;
1100   DirectivesStack::release(directive);
1101 
1102   // Compile method and check result
1103   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, CHECK_false);
1104   MutexLocker mu(THREAD, Compile_lock);
1105   bool is_queued = mh->queued_for_compilation();
1106   if ((!is_blocking && is_queued) || nm != nullptr) {
1107     return true;
1108   }
1109   // Check code again because compilation may be finished before Compile_lock is acquired.
1110   if (bci == InvocationEntryBci) {
1111     nmethod* code = mh->code();
1112     if (code != nullptr) {
1113       return true;
1114     }
1115   } else if (mh->lookup_osr_nmethod_for(bci, comp_level, false) != nullptr) {
1116     return true;
1117   }
1118   tty->print("WB error: failed to %s compile at level %d method ", is_blocking ? "blocking" : "", comp_level);
1119   mh->print_short_name(tty);
1120   tty->cr();
1121   if (is_blocking && is_queued) {
1122     tty->print_cr("WB error: blocking compilation is still in queue!");
1123   }
1124   return false;
1125 }
1126 
1127 size_t WhiteBox::get_in_use_monitor_count() {
1128   return ObjectSynchronizer::_in_use_list.count();
1129 }
1130 
1131 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1132   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1133   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1134   return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1135 WB_END
1136 
1137 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1138   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1139   Method* clinit = ik->class_initializer();
1140   if (clinit == nullptr || clinit->method_holder()->is_not_initialized()) {
1141     return false;
1142   }
1143   return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1144 WB_END
1145 
1146 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1147   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1148   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1149 
1150   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1151   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
1152   bool result = directive->PrintAssemblyOption;
1153   DirectivesStack::release(directive);
1154 
1155   return result;
1156 WB_END
1157 
1158 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1159   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1160   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1161 
1162   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1163 
1164   ResourceMark rm(THREAD);
1165   const char* error_msg = nullptr;
1166   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1167   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1168 
1169   if (m == nullptr) {
1170     assert(error_msg != nullptr, "Always have an error message");
1171     tty->print_cr("Got error: %s", error_msg);
1172     return -1; // Pattern failed
1173   }
1174 
1175   // Pattern works - now check if it matches
1176   int result;
1177   if (m->match(mh, InlineMatcher::force_inline)) {
1178     result = 2; // Force inline match
1179   } else if (m->match(mh, InlineMatcher::dont_inline)) {
1180     result = 1; // Dont inline match
1181   } else {
1182     result = 0; // No match
1183   }
1184   delete m;
1185   return result;
1186 WB_END
1187 
1188 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1189   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1190   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1191 
1192   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1193 
1194   ResourceMark rm;
1195   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1196 
1197   const char* error_msg = nullptr;
1198 
1199   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg, false);
1200   if (m == nullptr) {
1201     assert(error_msg != nullptr, "Must have error_msg");
1202     tty->print_cr("Got error: %s", error_msg);
1203     return -1;
1204   }
1205 
1206   // Pattern works - now check if it matches
1207   int result = m->matches(mh);
1208   delete m;
1209   assert(result == 0 || result == 1, "Result out of range");
1210   return result;
1211 WB_END
1212 
1213 WB_ENTRY(void, WB_MarkMethodProfiled(JNIEnv* env, jobject o, jobject method))
1214   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1215   CHECK_JNI_EXCEPTION(env);
1216   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1217 
1218   MethodData* mdo = mh->method_data();
1219   if (mdo == nullptr) {
1220     Method::build_profiling_method_data(mh, CHECK_AND_CLEAR);
1221     mdo = mh->method_data();
1222   }
1223   mdo->init();
1224   InvocationCounter* icnt = mdo->invocation_counter();
1225   InvocationCounter* bcnt = mdo->backedge_counter();
1226   // set i-counter according to CompilationPolicy::is_method_profiled
1227   icnt->set(Tier4MinInvocationThreshold);
1228   bcnt->set(Tier4CompileThreshold);
1229 WB_END
1230 
1231 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1232   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1233   CHECK_JNI_EXCEPTION(env);
1234   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1235   MutexLocker mu(THREAD, Compile_lock);
1236   MethodData* mdo = mh->method_data();
1237   MethodCounters* mcs = mh->method_counters();
1238 
1239   if (mdo != nullptr) {
1240     mdo->init();
1241     ResourceMark rm(THREAD);
1242     int arg_count = mdo->method()->size_of_parameters();
1243     for (int i = 0; i < arg_count; i++) {
1244       mdo->set_arg_modified(i, 0);
1245     }
1246     mdo->clean_method_data(/*always_clean*/true);
1247   }
1248 
1249   mh->clear_is_not_c1_compilable();
1250   mh->clear_is_not_c2_compilable();
1251   mh->clear_is_not_c2_osr_compilable();
1252   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1253   if (mcs != nullptr) {
1254     mcs->clear_counters();
1255   }
1256 WB_END
1257 
1258 template <typename T, int type_enum>
1259 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1260   if (name == nullptr) {
1261     return false;
1262   }
1263   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1264   const char* flag_name = env->GetStringUTFChars(name, nullptr);
1265   CHECK_JNI_EXCEPTION_(env, false);
1266   const JVMFlag* flag = JVMFlag::find_declared_flag(flag_name);
1267   JVMFlag::Error result = JVMFlagAccess::get<T, type_enum>(flag, value);
1268   env->ReleaseStringUTFChars(name, flag_name);
1269   return (result == JVMFlag::SUCCESS);
1270 }
1271 
1272 template <typename T, int type_enum>
1273 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1274   if (name == nullptr) {
1275     return false;
1276   }
1277   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1278   const char* flag_name = env->GetStringUTFChars(name, nullptr);
1279   CHECK_JNI_EXCEPTION_(env, false);
1280   JVMFlag* flag = JVMFlag::find_flag(flag_name);
1281   JVMFlag::Error result = JVMFlagAccess::set<T, type_enum>(flag, value, JVMFlagOrigin::INTERNAL);
1282   env->ReleaseStringUTFChars(name, flag_name);
1283   return (result == JVMFlag::SUCCESS);
1284 }
1285 
1286 template <typename T>
1287 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1288   ResourceMark rm(thread);
1289   jclass clazz = env->FindClass(name->as_C_string());
1290   CHECK_JNI_EXCEPTION_(env, nullptr);
1291   jmethodID methodID = env->GetStaticMethodID(clazz,
1292         vmSymbols::valueOf_name()->as_C_string(),
1293         sig->as_C_string());
1294   CHECK_JNI_EXCEPTION_(env, nullptr);
1295   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1296   CHECK_JNI_EXCEPTION_(env, nullptr);
1297   return result;
1298 }
1299 
1300 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1301   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1302 }
1303 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1304   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1305 }
1306 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1307   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1308 }
1309 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1310   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1311 }*/
1312 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1313   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1314 }
1315 
1316 static const JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1317   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1318   const char* flag_name = env->GetStringUTFChars(name, nullptr);
1319   CHECK_JNI_EXCEPTION_(env, nullptr);
1320   const JVMFlag* result = JVMFlag::find_declared_flag(flag_name);
1321   env->ReleaseStringUTFChars(name, flag_name);
1322   return result;
1323 }
1324 
1325 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1326   const JVMFlag* flag = getVMFlag(thread, env, name);
1327   return (flag != nullptr) && flag->is_constant_in_binary();
1328 WB_END
1329 
1330 WB_ENTRY(jboolean, WB_IsDefaultVMFlag(JNIEnv* env, jobject o, jstring name))
1331   const JVMFlag* flag = getVMFlag(thread, env, name);
1332   return (flag != nullptr) && flag->is_default();
1333 WB_END
1334 
1335 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1336   const JVMFlag* flag = getVMFlag(thread, env, name);
1337   return (flag != nullptr) && !(flag->is_unlocked() || flag->is_unlocker());
1338 WB_END
1339 
1340 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1341   bool result;
1342   if (GetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result)) {
1343     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1344     return booleanBox(thread, env, result);
1345   }
1346   return nullptr;
1347 WB_END
1348 
1349 template <typename T, int type_enum>
1350 jobject GetVMFlag_longBox(JNIEnv* env, JavaThread* thread, jstring name) {
1351   T result;
1352   if (GetVMFlag <T, type_enum> (thread, env, name, &result)) {
1353     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1354     return longBox(thread, env, result);
1355   }
1356   return nullptr;
1357 }
1358 
1359 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1360   return GetVMFlag_longBox<JVM_FLAG_TYPE(int)>(env, thread, name);
1361 WB_END
1362 
1363 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1364   return GetVMFlag_longBox<JVM_FLAG_TYPE(uint)>(env, thread, name);
1365 WB_END
1366 
1367 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1368   return GetVMFlag_longBox<JVM_FLAG_TYPE(intx)>(env, thread, name);
1369 WB_END
1370 
1371 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1372   return GetVMFlag_longBox<JVM_FLAG_TYPE(uintx)>(env, thread, name);
1373 WB_END
1374 
1375 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1376   return GetVMFlag_longBox<JVM_FLAG_TYPE(uint64_t)>(env, thread, name);
1377 WB_END
1378 
1379 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1380   return GetVMFlag_longBox<JVM_FLAG_TYPE(size_t)>(env, thread, name);
1381 WB_END
1382 
1383 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1384   double result;
1385   if (GetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result)) {
1386     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1387     return doubleBox(thread, env, result);
1388   }
1389   return nullptr;
1390 WB_END
1391 
1392 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1393   ccstr ccstrResult;
1394   if (GetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &ccstrResult)) {
1395     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1396     jstring result = env->NewStringUTF(ccstrResult);
1397     CHECK_JNI_EXCEPTION_(env, nullptr);
1398     return result;
1399   }
1400   return nullptr;
1401 WB_END
1402 
1403 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1404   bool result = value == JNI_TRUE ? true : false;
1405   SetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result);
1406 WB_END
1407 
1408 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1409   int result = checked_cast<int>(value);
1410   SetVMFlag <JVM_FLAG_TYPE(int)> (thread, env, name, &result);
1411 WB_END
1412 
1413 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1414   uint result = checked_cast<uint>(value);
1415   SetVMFlag <JVM_FLAG_TYPE(uint)> (thread, env, name, &result);
1416 WB_END
1417 
1418 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1419   intx result = value;
1420   SetVMFlag <JVM_FLAG_TYPE(intx)> (thread, env, name, &result);
1421 WB_END
1422 
1423 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1424   uintx result = value;
1425   SetVMFlag <JVM_FLAG_TYPE(uintx)> (thread, env, name, &result);
1426 WB_END
1427 
1428 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1429   uint64_t result = value;
1430   SetVMFlag <JVM_FLAG_TYPE(uint64_t)> (thread, env, name, &result);
1431 WB_END
1432 
1433 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1434   size_t result = value;
1435   SetVMFlag <JVM_FLAG_TYPE(size_t)> (thread, env, name, &result);
1436 WB_END
1437 
1438 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1439   double result = value;
1440   SetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result);
1441 WB_END
1442 
1443 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1444   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1445   const char* ccstrValue;
1446   if (value == nullptr) {
1447     ccstrValue = nullptr;
1448   }
1449   else {
1450     ccstrValue = env->GetStringUTFChars(value, nullptr);
1451     CHECK_JNI_EXCEPTION(env);
1452   }
1453   {
1454     ccstr param = ccstrValue;
1455     ThreadInVMfromNative ttvfn(thread); // back to VM
1456     if (SetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &param)) {
1457       assert(param == nullptr, "old value is freed automatically and not returned");
1458     }
1459   }
1460   if (value != nullptr) {
1461     env->ReleaseStringUTFChars(value, ccstrValue);
1462   }
1463 WB_END
1464 
1465 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1466   WhiteBox::compilation_locked = true;
1467 WB_END
1468 
1469 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1470   MonitorLocker mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1471   WhiteBox::compilation_locked = false;
1472   mo.notify_all();
1473 WB_END
1474 
1475 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1476   ResourceMark rm(THREAD);
1477   int len;
1478   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1479   return (StringTable::lookup(name, len) != nullptr);
1480 WB_END
1481 
1482 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1483   Universe::heap()->soft_ref_policy()->set_should_clear_all_soft_refs(true);
1484   Universe::heap()->collect(GCCause::_wb_full_gc);
1485 #if INCLUDE_G1GC || INCLUDE_SERIALGC
1486   if (UseG1GC || UseSerialGC) {
1487     // Needs to be cleared explicitly for G1 and Serial GC.
1488     Universe::heap()->soft_ref_policy()->set_should_clear_all_soft_refs(false);
1489   }
1490 #endif // INCLUDE_G1GC || INCLUDE_SERIALGC
1491 WB_END
1492 
1493 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1494   Universe::heap()->collect(GCCause::_wb_young_gc);
1495 WB_END
1496 
1497 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1498   // static+volatile in order to force the read to happen
1499   // (not be eliminated by the compiler)
1500   static char c;
1501   static volatile char* p;
1502 
1503   p = os::reserve_memory(os::vm_allocation_granularity());
1504   if (p == nullptr) {
1505     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1506   }
1507 
1508   c = *p;
1509 WB_END
1510 
1511 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1512   const char* features = VM_Version::features_string();
1513   ThreadToNativeFromVM ttn(thread);
1514   jstring features_string = env->NewStringUTF(features);
1515 
1516   CHECK_JNI_EXCEPTION_(env, nullptr);
1517 
1518   return features_string;
1519 WB_END
1520 
1521 CodeBlobType WhiteBox::get_blob_type(const CodeBlob* code) {
1522   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1523   return CodeCache::get_code_heap(code)->code_blob_type();
1524 }
1525 
1526 CodeHeap* WhiteBox::get_code_heap(CodeBlobType blob_type) {
1527   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1528   return CodeCache::get_code_heap(blob_type);
1529 }
1530 
1531 struct CodeBlobStub {
1532   CodeBlobStub(const CodeBlob* blob) :
1533       name(os::strdup(blob->name())),
1534       size(blob->size()),
1535       blob_type(static_cast<jint>(WhiteBox::get_blob_type(blob))),
1536       address((jlong) blob) { }
1537   ~CodeBlobStub() { os::free((void*) name); }
1538   const char* const name;
1539   const jint        size;
1540   const jint        blob_type;
1541   const jlong       address;
1542 };
1543 
1544 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1545   ResourceMark rm;
1546   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1547   CHECK_JNI_EXCEPTION_(env, nullptr);
1548   jobjectArray result = env->NewObjectArray(4, clazz, nullptr);
1549 
1550   jstring name = env->NewStringUTF(cb->name);
1551   CHECK_JNI_EXCEPTION_(env, nullptr);
1552   env->SetObjectArrayElement(result, 0, name);
1553 
1554   jobject obj = integerBox(thread, env, cb->size);
1555   CHECK_JNI_EXCEPTION_(env, nullptr);
1556   env->SetObjectArrayElement(result, 1, obj);
1557 
1558   obj = integerBox(thread, env, cb->blob_type);
1559   CHECK_JNI_EXCEPTION_(env, nullptr);
1560   env->SetObjectArrayElement(result, 2, obj);
1561 
1562   obj = longBox(thread, env, cb->address);
1563   CHECK_JNI_EXCEPTION_(env, nullptr);
1564   env->SetObjectArrayElement(result, 3, obj);
1565 
1566   return result;
1567 }
1568 
1569 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1570   ResourceMark rm(THREAD);
1571   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1572   CHECK_JNI_EXCEPTION_(env, nullptr);
1573   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1574   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1575   jobjectArray result = nullptr;
1576   if (code == nullptr) {
1577     return result;
1578   }
1579   int comp_level = code->comp_level();
1580   int insts_size = code->insts_size();
1581 
1582   ThreadToNativeFromVM ttn(thread);
1583   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1584   CHECK_JNI_EXCEPTION_(env, nullptr);
1585   result = env->NewObjectArray(5, clazz, nullptr);
1586   if (result == nullptr) {
1587     return result;
1588   }
1589 
1590   CodeBlobStub stub(code);
1591   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1592   CHECK_JNI_EXCEPTION_(env, nullptr);
1593   env->SetObjectArrayElement(result, 0, codeBlob);
1594 
1595   jobject level = integerBox(thread, env, comp_level);
1596   CHECK_JNI_EXCEPTION_(env, nullptr);
1597   env->SetObjectArrayElement(result, 1, level);
1598 
1599   jbyteArray insts = env->NewByteArray(insts_size);
1600   CHECK_JNI_EXCEPTION_(env, nullptr);
1601   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1602   env->SetObjectArrayElement(result, 2, insts);
1603 
1604   jobject id = integerBox(thread, env, code->compile_id());
1605   CHECK_JNI_EXCEPTION_(env, nullptr);
1606   env->SetObjectArrayElement(result, 3, id);
1607 
1608   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1609   CHECK_JNI_EXCEPTION_(env, nullptr);
1610   env->SetObjectArrayElement(result, 4, entry_point);
1611 
1612   return result;
1613 WB_END
1614 
1615 CodeBlob* WhiteBox::allocate_code_blob(int size, CodeBlobType blob_type) {
1616   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1617   BufferBlob* blob;
1618   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1619   if (full_size < size) {
1620     full_size += align_up(size - full_size, oopSize);
1621   }
1622   {
1623     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1624     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1625     if (blob != nullptr) {
1626       ::new (blob) BufferBlob("WB::DummyBlob", CodeBlobKind::Buffer, full_size);
1627     }
1628   }
1629   // Track memory usage statistic after releasing CodeCache_lock
1630   MemoryService::track_code_cache_memory_usage();
1631   return blob;
1632 }
1633 
1634 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1635   if (size < 0) {
1636     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1637       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1638   }
1639   return (jlong) WhiteBox::allocate_code_blob(size, static_cast<CodeBlobType>(blob_type));
1640 WB_END
1641 
1642 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1643   if (addr == 0) {
1644     return;
1645   }
1646   BufferBlob::free((BufferBlob*) addr);
1647 WB_END
1648 
1649 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1650   ResourceMark rm;
1651   GrowableArray<CodeBlobStub*> blobs;
1652   {
1653     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1654     CodeHeap* heap = WhiteBox::get_code_heap(static_cast<CodeBlobType>(blob_type));
1655     if (heap == nullptr) {
1656       return nullptr;
1657     }
1658     for (CodeBlob* cb = (CodeBlob*) heap->first();
1659          cb != nullptr; cb = (CodeBlob*) heap->next(cb)) {
1660       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1661       new (stub) CodeBlobStub(cb);
1662       blobs.append(stub);
1663     }
1664   }
1665   ThreadToNativeFromVM ttn(thread);
1666   jobjectArray result = nullptr;
1667   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1668   CHECK_JNI_EXCEPTION_(env, nullptr);
1669   result = env->NewObjectArray(blobs.length(), clazz, nullptr);
1670   CHECK_JNI_EXCEPTION_(env, nullptr);
1671   if (result == nullptr) {
1672     return result;
1673   }
1674   int i = 0;
1675   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1676        it != blobs.end(); ++it) {
1677     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1678     CHECK_JNI_EXCEPTION_(env, nullptr);
1679     env->SetObjectArrayElement(result, i, obj);
1680     CHECK_JNI_EXCEPTION_(env, nullptr);
1681     ++i;
1682   }
1683   return result;
1684 WB_END
1685 
1686 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1687   return CompileBroker::get_compilation_activity_mode();
1688 WB_END
1689 
1690 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1691   if (addr == 0) {
1692     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1693       "WB_GetCodeBlob: addr is null");
1694   }
1695   ThreadToNativeFromVM ttn(thread);
1696   CodeBlobStub stub((CodeBlob*) addr);
1697   return codeBlob2objectArray(thread, env, &stub);
1698 WB_END
1699 
1700 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1701   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1702   CHECK_JNI_EXCEPTION_(env, 0);
1703   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1704   return (jlong) mh->method_data();
1705 WB_END
1706 
1707 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1708   return (jlong) thread->stack_size();
1709 WB_END
1710 
1711 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1712   return (jlong) thread->stack_overflow_state()->stack_available(
1713                    os::current_stack_pointer()) - (jlong)StackOverflow::stack_shadow_zone_size();
1714 WB_END
1715 
1716 
1717 int WhiteBox::array_bytes_to_length(size_t bytes) {
1718   return Array<u1>::bytes_to_length(bytes);
1719 }
1720 
1721 ///////////////
1722 // MetaspaceTestContext and MetaspaceTestArena
1723 WB_ENTRY(jlong, WB_CreateMetaspaceTestContext(JNIEnv* env, jobject wb, jlong commit_limit, jlong reserve_limit))
1724   metaspace::MetaspaceTestContext* context =
1725       new metaspace::MetaspaceTestContext("whitebox-metaspace-context", (size_t) commit_limit, (size_t) reserve_limit);
1726   return (jlong)p2i(context);
1727 WB_END
1728 
1729 WB_ENTRY(void, WB_DestroyMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1730   delete (metaspace::MetaspaceTestContext*) context;
1731 WB_END
1732 
1733 WB_ENTRY(void, WB_PurgeMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1734   metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1735   context0->purge_area();
1736 WB_END
1737 
1738 WB_ENTRY(void, WB_PrintMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1739   metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1740   context0->print_on(tty);
1741 WB_END
1742 
1743 WB_ENTRY(jlong, WB_GetTotalCommittedWordsInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1744   metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1745   return context0->committed_words();
1746 WB_END
1747 
1748 WB_ENTRY(jlong, WB_GetTotalUsedWordsInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1749   metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1750   return context0->used_words();
1751 WB_END
1752 
1753 WB_ENTRY(jlong, WB_CreateArenaInTestContext(JNIEnv* env, jobject wb, jlong context, jboolean is_micro))
1754   const Metaspace::MetaspaceType type = is_micro ? Metaspace::ReflectionMetaspaceType : Metaspace::StandardMetaspaceType;
1755   metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1756   return (jlong)p2i(context0->create_arena(type));
1757 WB_END
1758 
1759 WB_ENTRY(void, WB_DestroyMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena))
1760   delete (metaspace::MetaspaceTestArena*) arena;
1761 WB_END
1762 
1763 WB_ENTRY(jlong, WB_AllocateFromMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong word_size))
1764   metaspace::MetaspaceTestArena* arena0 = (metaspace::MetaspaceTestArena*) arena;
1765   MetaWord* p = arena0->allocate((size_t) word_size);
1766   return (jlong)p2i(p);
1767 WB_END
1768 
1769 WB_ENTRY(void, WB_DeallocateToMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong p, jlong word_size))
1770   metaspace::MetaspaceTestArena* arena0 = (metaspace::MetaspaceTestArena*) arena;
1771   arena0->deallocate((MetaWord*)p, (size_t) word_size);
1772 WB_END
1773 
1774 WB_ENTRY(jlong, WB_GetMaxMetaspaceAllocationSize(JNIEnv* env, jobject wb))
1775   return (jlong) Metaspace::max_allocation_word_size() * BytesPerWord;
1776 WB_END
1777 
1778 //////////////
1779 
1780 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1781   if (size < 0) {
1782     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1783         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1784   }
1785 
1786   oop class_loader_oop = JNIHandles::resolve(class_loader);
1787   ClassLoaderData* cld = class_loader_oop != nullptr
1788       ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1789       : ClassLoaderData::the_null_class_loader_data();
1790 
1791   void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1792 
1793   return (jlong)(uintptr_t)metadata;
1794 WB_END
1795 
1796 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1797                                 jstring version, jstring location, jobjectArray packages))
1798   Handle h_module (THREAD, JNIHandles::resolve(module));
1799   Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1800 WB_END
1801 
1802 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1803   Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1804   Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1805   Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1806 WB_END
1807 
1808 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1809   Handle h_module (THREAD, JNIHandles::resolve(module));
1810   Modules::add_module_exports_to_all_unnamed(h_module, package, CHECK);
1811 WB_END
1812 
1813 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1814   Handle h_module (THREAD, JNIHandles::resolve(module));
1815   Modules::add_module_exports(h_module, package, Handle(), CHECK);
1816 WB_END
1817 
1818 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1819   Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1820   Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1821   Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1822 WB_END
1823 
1824 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1825   if (inc < 0) {
1826     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1827         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1828   }
1829 
1830   jlong max_size_t = (jlong) ((size_t) -1);
1831   if (inc > max_size_t) {
1832     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1833         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1834   }
1835 
1836   size_t new_cap_until_GC = 0;
1837   size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1838   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1839   if (!success) {
1840     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1841                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1842                 "due to contention with another thread");
1843   }
1844   return (jlong) new_cap_until_GC;
1845 WB_END
1846 
1847 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1848   return (jlong) MetaspaceGC::capacity_until_GC();
1849 WB_END
1850 
1851 // The function is only valid when CDS is available.
1852 WB_ENTRY(jlong, WB_MetaspaceSharedRegionAlignment(JNIEnv* env, jobject wb))
1853 #if INCLUDE_CDS
1854   return (jlong)MetaspaceShared::core_region_alignment();
1855 #else
1856   ShouldNotReachHere();
1857   return 0L;
1858 #endif
1859 WB_END
1860 
1861 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1862   oop obj_oop = JNIHandles::resolve(obj);
1863   return (jboolean) obj_oop->mark().has_monitor();
1864 WB_END
1865 
1866 WB_ENTRY(jlong, WB_getInUseMonitorCount(JNIEnv* env, jobject wb))
1867   return (jlong) WhiteBox::get_in_use_monitor_count();
1868 WB_END
1869 
1870 WB_ENTRY(jint, WB_getLockStackCapacity(JNIEnv* env))
1871   return (jint) LockStack::CAPACITY;
1872 WB_END
1873 
1874 WB_ENTRY(jboolean, WB_supportsRecursiveLightweightLocking(JNIEnv* env))
1875   return (jboolean) VM_Version::supports_recursive_lightweight_locking();
1876 WB_END
1877 
1878 WB_ENTRY(jboolean, WB_DeflateIdleMonitors(JNIEnv* env, jobject wb))
1879   log_info(monitorinflation)("WhiteBox initiated DeflateIdleMonitors");
1880   return ObjectSynchronizer::request_deflate_idle_monitors_from_wb();
1881 WB_END
1882 
1883 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1884   VM_ForceSafepoint force_safepoint_op;
1885   VMThread::execute(&force_safepoint_op);
1886 WB_END
1887 
1888 WB_ENTRY(void, WB_ForceClassLoaderStatsSafepoint(JNIEnv* env, jobject wb))
1889   nullStream dev_null;
1890   ClassLoaderStatsVMOperation force_op(&dev_null);
1891   VMThread::execute(&force_op);
1892 WB_END
1893 
1894 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1895   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1896   return (jlong) ik->constants();
1897 WB_END
1898 
1899 WB_ENTRY(jobjectArray, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass klass))
1900   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1901   objArrayOop resolved_refs= ik->constants()->resolved_references();
1902   return (jobjectArray)JNIHandles::make_local(THREAD, resolved_refs);
1903 WB_END
1904 
1905 WB_ENTRY(jint, WB_getFieldEntriesLength(JNIEnv* env, jobject wb, jclass klass))
1906   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1907   ConstantPool* cp = ik->constants();
1908   if (cp->cache() == nullptr) {
1909     return -1;
1910   }
1911   return cp->resolved_field_entries_length();
1912 WB_END
1913 
1914 WB_ENTRY(jint, WB_getFieldCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
1915   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1916   ConstantPool* cp = ik->constants();
1917   if (cp->cache() == nullptr) {
1918       return -1;
1919   }
1920   return cp->resolved_field_entry_at(index)->constant_pool_index();
1921 WB_END
1922 
1923 WB_ENTRY(jint, WB_getMethodEntriesLength(JNIEnv* env, jobject wb, jclass klass))
1924   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1925   ConstantPool* cp = ik->constants();
1926   if (cp->cache() == nullptr) {
1927     return -1;
1928   }
1929   return cp->resolved_method_entries_length();
1930 WB_END
1931 
1932 WB_ENTRY(jint, WB_getMethodCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
1933   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1934   ConstantPool* cp = ik->constants();
1935   if (cp->cache() == nullptr) {
1936       return -1;
1937   }
1938   return cp->resolved_method_entry_at(index)->constant_pool_index();
1939 WB_END
1940 
1941 WB_ENTRY(jint, WB_getIndyInfoLength(JNIEnv* env, jobject wb, jclass klass))
1942   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1943   ConstantPool* cp = ik->constants();
1944   if (cp->cache() == nullptr) {
1945       return -1;
1946   }
1947   return cp->resolved_indy_entries_length();
1948 WB_END
1949 
1950 WB_ENTRY(jint, WB_getIndyCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
1951   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1952   ConstantPool* cp = ik->constants();
1953   if (cp->cache() == nullptr) {
1954       return -1;
1955   }
1956   return cp->resolved_indy_entry_at(index)->constant_pool_index();
1957 WB_END
1958 
1959 WB_ENTRY(jobject, WB_printClasses(JNIEnv* env, jobject wb, jstring class_name_pattern, jint flags))
1960   ThreadToNativeFromVM ttnfv(thread);
1961   const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
1962   ResourceMark rm;
1963   stringStream st;
1964   {
1965     ThreadInVMfromNative ttvfn(thread); // back to VM
1966     ClassPrinter::print_classes(c, flags, &st);
1967   }
1968   jstring result = env->NewStringUTF(st.freeze());
1969   CHECK_JNI_EXCEPTION_(env, nullptr);
1970   return result;
1971 WB_END
1972 
1973 WB_ENTRY(jobject, WB_printMethods(JNIEnv* env, jobject wb, jstring class_name_pattern, jstring method_pattern, jint flags))
1974   ThreadToNativeFromVM ttnfv(thread);
1975   const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
1976   const char* m = env->GetStringUTFChars(method_pattern, nullptr);
1977   ResourceMark rm;
1978   stringStream st;
1979   {
1980     ThreadInVMfromNative ttvfn(thread); // back to VM
1981     ClassPrinter::print_methods(c, m, flags, &st);
1982   }
1983   jstring result = env->NewStringUTF(st.freeze());
1984   CHECK_JNI_EXCEPTION_(env, nullptr);
1985   return result;
1986 WB_END
1987 
1988 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1989   VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1990   VMThread::execute(&clear_ics);
1991 WB_END
1992 
1993 template <typename T>
1994 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1995   assert(value != nullptr, "sanity");
1996   if (method == nullptr || name == nullptr) {
1997     return false;
1998   }
1999   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
2000   CHECK_JNI_EXCEPTION_(env, false);
2001   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
2002   // can't be in VM when we call JNI
2003   ThreadToNativeFromVM ttnfv(thread);
2004   const char* flag_name = env->GetStringUTFChars(name, nullptr);
2005   CHECK_JNI_EXCEPTION_(env, false);
2006   CompileCommandEnum option = CompilerOracle::string_to_option(flag_name);
2007   env->ReleaseStringUTFChars(name, flag_name);
2008   if (option == CompileCommandEnum::Unknown) {
2009     return false;
2010   }
2011   if (!CompilerOracle::option_matches_type(option, *value)) {
2012     return false;
2013   }
2014   return CompilerOracle::has_option_value(mh, option, *value);
2015 }
2016 
2017 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2018   bool result;
2019   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
2020     // can't be in VM when we call JNI
2021     ThreadToNativeFromVM ttnfv(thread);
2022     return booleanBox(thread, env, result);
2023   }
2024   return nullptr;
2025 WB_END
2026 
2027 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2028   intx result;
2029   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
2030     // can't be in VM when we call JNI
2031     ThreadToNativeFromVM ttnfv(thread);
2032     return longBox(thread, env, result);
2033   }
2034   return nullptr;
2035 WB_END
2036 
2037 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2038   uintx result;
2039   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
2040     // can't be in VM when we call JNI
2041     ThreadToNativeFromVM ttnfv(thread);
2042     return longBox(thread, env, result);
2043   }
2044   return nullptr;
2045 WB_END
2046 
2047 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2048   double result;
2049   if (GetMethodOption <double> (thread, env, method, name, &result)) {
2050     // can't be in VM when we call JNI
2051     ThreadToNativeFromVM ttnfv(thread);
2052     return doubleBox(thread, env, result);
2053   }
2054   return nullptr;
2055 WB_END
2056 
2057 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2058   ccstr ccstrResult;
2059   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
2060     // can't be in VM when we call JNI
2061     ThreadToNativeFromVM ttnfv(thread);
2062     jstring result = env->NewStringUTF(ccstrResult);
2063     CHECK_JNI_EXCEPTION_(env, nullptr);
2064     return result;
2065   }
2066   return nullptr;
2067 WB_END
2068 
2069 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
2070   const char* p = CDSConfig::default_archive_path();
2071   ThreadToNativeFromVM ttn(thread);
2072   jstring path_string = env->NewStringUTF(p);
2073 
2074   CHECK_JNI_EXCEPTION_(env, nullptr);
2075 
2076   return path_string;
2077 WB_END
2078 
2079 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
2080   return CDSConfig::is_using_archive();
2081 WB_END
2082 
2083 WB_ENTRY(jint, WB_GetCDSGenericHeaderMinVersion(JNIEnv* env, jobject wb))
2084 #if INCLUDE_CDS
2085   return (jint)CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION;
2086 #else
2087   ShouldNotReachHere();
2088   return (jint)-1;
2089 #endif
2090 WB_END
2091 
2092 WB_ENTRY(jint, WB_GetCDSCurrentVersion(JNIEnv* env, jobject wb))
2093 #if INCLUDE_CDS
2094   return (jint)CURRENT_CDS_ARCHIVE_VERSION;
2095 #else
2096   ShouldNotReachHere();
2097   return (jint)-1;
2098 #endif
2099 WB_END
2100 
2101 WB_ENTRY(jboolean, WB_CDSMemoryMappingFailed(JNIEnv* env, jobject wb))
2102   return FileMapInfo::memory_mapping_failed();
2103 WB_END
2104 
2105 WB_ENTRY(jboolean, WB_IsSharedInternedString(JNIEnv* env, jobject wb, jobject str))
2106   ResourceMark rm(THREAD);
2107   oop str_oop = JNIHandles::resolve(str);
2108   int length;
2109   jchar* chars = java_lang_String::as_unicode_string(str_oop, length, CHECK_(false));
2110   return StringTable::lookup_shared(chars, length) == str_oop;
2111 WB_END
2112 
2113 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
2114   return (jboolean)MetaspaceShared::is_in_shared_metaspace(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2115 WB_END
2116 
2117 WB_ENTRY(jboolean, WB_AreSharedStringsMapped(JNIEnv* env))
2118   return ArchiveHeapLoader::is_mapped();
2119 WB_END
2120 
2121 WB_ENTRY(void, WB_LinkClass(JNIEnv* env, jobject wb, jclass clazz))
2122   Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2123   if (!k->is_instance_klass()) {
2124     return;
2125   }
2126   InstanceKlass *ik = InstanceKlass::cast(k);
2127   ik->link_class(THREAD); // may throw verification error
2128 WB_END
2129 
2130 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
2131   return ArchiveHeapLoader::is_mapped();
2132 WB_END
2133 
2134 WB_ENTRY(jboolean, WB_IsCDSIncluded(JNIEnv* env))
2135 #if INCLUDE_CDS
2136   // An exploded build inhibits use of CDS. Therefore, for the
2137   // purpose of testing, the JVM can be treated as not having CDS
2138   // built in at all.
2139   return ClassLoader::has_jrt_entry();
2140 #else
2141   return false;
2142 #endif // INCLUDE_CDS
2143 WB_END
2144 
2145 WB_ENTRY(jboolean, WB_isC2OrJVMCIIncluded(JNIEnv* env))
2146 #if COMPILER2_OR_JVMCI
2147   return true;
2148 #else
2149   return false;
2150 #endif
2151 WB_END
2152 
2153 WB_ENTRY(jboolean, WB_IsJVMCISupportedByGC(JNIEnv* env))
2154 #if INCLUDE_JVMCI
2155   return JVMCIGlobals::gc_supports_jvmci();
2156 #else
2157   return false;
2158 #endif
2159 WB_END
2160 
2161 WB_ENTRY(jboolean, WB_CanWriteJavaHeapArchive(JNIEnv* env))
2162   return HeapShared::can_write();
2163 WB_END
2164 
2165 
2166 WB_ENTRY(jboolean, WB_IsJFRIncluded(JNIEnv* env))
2167 #if INCLUDE_JFR
2168   return true;
2169 #else
2170   return false;
2171 #endif // INCLUDE_JFR
2172 WB_END
2173 
2174 WB_ENTRY(jboolean, WB_IsDTraceIncluded(JNIEnv* env))
2175 #if defined(DTRACE_ENABLED)
2176   return true;
2177 #else
2178   return false;
2179 #endif // DTRACE_ENABLED
2180 WB_END
2181 
2182 #if INCLUDE_CDS
2183 
2184 WB_ENTRY(jint, WB_GetCDSOffsetForName(JNIEnv* env, jobject o, jstring name))
2185   ResourceMark rm;
2186   char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2187   jint result = (jint)CDSConstants::get_cds_offset(c_name);
2188   return result;
2189 WB_END
2190 
2191 WB_ENTRY(jint, WB_GetCDSConstantForName(JNIEnv* env, jobject o, jstring name))
2192   ResourceMark rm;
2193   char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2194   jint result = (jint)CDSConstants::get_cds_constant(c_name);
2195   return result;
2196 WB_END
2197 
2198 #endif // INCLUDE_CDS
2199 
2200 WB_ENTRY(jboolean, WB_HandshakeReadMonitors(JNIEnv* env, jobject wb, jobject thread_handle))
2201   class ReadMonitorsClosure : public HandshakeClosure {
2202     jboolean _executed;
2203 
2204     void do_thread(Thread* th) {
2205       JavaThread* jt = JavaThread::cast(th);
2206       ResourceMark rm;
2207 
2208       GrowableArray<MonitorInfo*>* info = new GrowableArray<MonitorInfo*>();
2209 
2210       if (!jt->has_last_Java_frame()) {
2211         return;
2212       }
2213       RegisterMap rmap(jt,
2214                        RegisterMap::UpdateMap::include,
2215                        RegisterMap::ProcessFrames::include,
2216                        RegisterMap::WalkContinuation::skip);
2217       for (javaVFrame* vf = jt->last_java_vframe(&rmap); vf != nullptr; vf = vf->java_sender()) {
2218         GrowableArray<MonitorInfo*> *monitors = vf->monitors();
2219         if (monitors != nullptr) {
2220           int len = monitors->length();
2221           // Walk monitors youngest to oldest
2222           for (int i = len - 1; i >= 0; i--) {
2223             MonitorInfo* mon_info = monitors->at(i);
2224             if (mon_info->eliminated()) continue;
2225             oop owner = mon_info->owner();
2226             if (owner != nullptr) {
2227               info->append(mon_info);
2228             }
2229           }
2230         }
2231       }
2232       _executed = true;
2233     }
2234 
2235    public:
2236     ReadMonitorsClosure() : HandshakeClosure("WB_HandshakeReadMonitors"), _executed(false) {}
2237     jboolean executed() const { return _executed; }
2238   };
2239 
2240   ReadMonitorsClosure rmc;
2241   if (thread_handle != nullptr) {
2242     ThreadsListHandle tlh;
2243     JavaThread* target = nullptr;
2244     bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2245     if (is_alive) {
2246       Handshake::execute(&rmc, &tlh, target);
2247     }
2248   }
2249   return rmc.executed();
2250 WB_END
2251 
2252 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
2253   class TraceSelfClosure : public HandshakeClosure {
2254     jint _num_threads_completed;
2255 
2256     void do_thread(Thread* th) {
2257       JavaThread* jt = JavaThread::cast(th);
2258       ResourceMark rm;
2259 
2260       jt->print_on(tty);
2261       jt->print_stack_on(tty);
2262       tty->cr();
2263       Atomic::inc(&_num_threads_completed);
2264     }
2265 
2266   public:
2267     TraceSelfClosure(Thread* thread) : HandshakeClosure("WB_TraceSelf"), _num_threads_completed(0) {}
2268 
2269     jint num_threads_completed() const { return _num_threads_completed; }
2270   };
2271   TraceSelfClosure tsc(Thread::current());
2272 
2273   if (all_threads) {
2274     Handshake::execute(&tsc);
2275   } else if (thread_handle != nullptr) {
2276     ThreadsListHandle tlh;
2277     JavaThread* target = nullptr;
2278     bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2279     if (is_alive) {
2280       Handshake::execute(&tsc, &tlh, target);
2281     }
2282   }
2283   return tsc.num_threads_completed();
2284 WB_END
2285 
2286 WB_ENTRY(void, WB_AsyncHandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle))
2287   class TraceSelfClosure : public AsyncHandshakeClosure {
2288     JavaThread* _self;
2289     void do_thread(Thread* th) {
2290       assert(th->is_Java_thread(), "sanity");
2291       // AsynchHandshake handshakes are only executed by target.
2292       assert(_self == th, "Must be");
2293       assert(Thread::current() == th, "Must be");
2294       JavaThread* jt = JavaThread::cast(th);
2295       ResourceMark rm;
2296       jt->print_on(tty);
2297       jt->print_stack_on(tty);
2298       tty->cr();
2299     }
2300 
2301   public:
2302     TraceSelfClosure(JavaThread* self_target) : AsyncHandshakeClosure("WB_TraceSelf"), _self(self_target) {}
2303   };
2304   if (thread_handle != nullptr) {
2305     ThreadsListHandle tlh;
2306     JavaThread* target = nullptr;
2307     bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2308     if (is_alive) {
2309       TraceSelfClosure* tsc = new TraceSelfClosure(target);
2310       Handshake::execute(tsc, target);
2311     }
2312   }
2313 WB_END
2314 
2315 static volatile int _emulated_lock = 0;
2316 
2317 WB_ENTRY(void, WB_LockAndBlock(JNIEnv* env, jobject wb, jboolean suspender))
2318   JavaThread* self = JavaThread::current();
2319 
2320   {
2321     // Before trying to acquire the lock transition into a safepoint safe state.
2322     // Otherwise if either suspender or suspendee blocks for a safepoint
2323     // in ~ThreadBlockInVM the other one could loop forever trying to acquire
2324     // the lock without allowing the safepoint to progress.
2325     ThreadBlockInVM tbivm(self);
2326 
2327     // We will deadlock here if we are 'suspender' and 'suspendee'
2328     // suspended in ~ThreadBlockInVM. This verifies we only suspend
2329     // at the right place.
2330     while (Atomic::cmpxchg(&_emulated_lock, 0, 1) != 0) {}
2331     assert(_emulated_lock == 1, "Must be locked");
2332 
2333     // Sleep much longer in suspendee to force situation where
2334     // 'suspender' is waiting above to acquire lock.
2335     os::naked_short_sleep(suspender ? 1 : 10);
2336   }
2337   Atomic::store(&_emulated_lock, 0);
2338 WB_END
2339 
2340 // Some convenience methods to deal with objects from java
2341 int WhiteBox::offset_for_field(const char* field_name, oop object,
2342     Symbol* signature_symbol) {
2343   assert(field_name != nullptr && strlen(field_name) > 0, "Field name not valid");
2344 
2345   //Get the class of our object
2346   Klass* arg_klass = object->klass();
2347   //Turn it into an instance-klass
2348   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
2349 
2350   //Create symbols to look for in the class
2351   TempNewSymbol name_symbol = SymbolTable::new_symbol(field_name);
2352 
2353   //To be filled in with an offset of the field we're looking for
2354   fieldDescriptor fd;
2355 
2356   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2357   if (res == nullptr) {
2358     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2359         name_symbol->as_C_string());
2360     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2361   }
2362 
2363   //fetch the field at the offset we've found
2364   int dest_offset = fd.offset();
2365 
2366   return dest_offset;
2367 }
2368 
2369 
2370 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2371   int offset = offset_for_field(field_name, object,
2372       vmSymbols::string_signature());
2373   oop string = object->obj_field(offset);
2374   if (string == nullptr) {
2375     return nullptr;
2376   }
2377   const char* ret = java_lang_String::as_utf8_string(string);
2378   return ret;
2379 }
2380 
2381 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2382   int offset =
2383       offset_for_field(field_name, object, vmSymbols::bool_signature());
2384   bool ret = (object->bool_field(offset) == JNI_TRUE);
2385   return ret;
2386 }
2387 
2388 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2389   ResourceMark rm;
2390   Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(wbclass));
2391   const char* klass_name = klass->external_name();
2392 
2393   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2394 
2395   //  one by one registration natives for exception catching
2396   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2397   CHECK_JNI_EXCEPTION(env);
2398   for (int i = 0, n = method_count; i < n; ++i) {
2399     // Skip dummy entries
2400     if (method_array[i].fnPtr == nullptr) continue;
2401     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2402       jthrowable throwable_obj = env->ExceptionOccurred();
2403       if (throwable_obj != nullptr) {
2404         env->ExceptionClear();
2405         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2406           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2407           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2408           tty->print_cr("Warning: 'NoSuchMethodError' on register of %s::%s%s",
2409               klass_name, method_array[i].name, method_array[i].signature);
2410         }
2411       } else {
2412         // Registration failed unexpectedly.
2413         tty->print_cr("Warning: unexpected error on register of %s::%s%s. All methods will be unregistered",
2414             klass_name, method_array[i].name, method_array[i].signature);
2415         env->UnregisterNatives(wbclass);
2416         break;
2417       }
2418     }
2419   }
2420 }
2421 
2422 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2423   // can't be in VM when we call JNI
2424   ThreadToNativeFromVM ttnfv(thread);
2425   const char* dir = env->GetStringUTFChars(compDirect, nullptr);
2426   CHECK_JNI_EXCEPTION_(env, 0);
2427   int ret;
2428   {
2429     ThreadInVMfromNative ttvfn(thread); // back to VM
2430     ret = DirectivesParser::parse_string(dir, tty);
2431   }
2432   env->ReleaseStringUTFChars(compDirect, dir);
2433   // -1 for error parsing directive. Return 0 as number of directives added.
2434   if (ret == -1) {
2435     ret = 0;
2436   }
2437   return (jint) ret;
2438 WB_END
2439 
2440 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2441   DirectivesStack::pop(count);
2442 WB_END
2443 
2444 // Checks that the library libfile has the noexecstack bit set.
2445 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2446   jboolean ret = false;
2447 #ifdef LINUX
2448   // Can't be in VM when we call JNI.
2449   ThreadToNativeFromVM ttnfv(thread);
2450   const char* lf = env->GetStringUTFChars(libfile, nullptr);
2451   CHECK_JNI_EXCEPTION_(env, 0);
2452   ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2453   env->ReleaseStringUTFChars(libfile, lf);
2454 #endif
2455   return ret;
2456 WB_END
2457 
2458 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2459   LINUX_ONLY(return OSContainer::is_containerized();)
2460   return false;
2461 WB_END
2462 
2463 // Physical memory of the host machine (including containers)
2464 WB_ENTRY(jlong, WB_HostPhysicalMemory(JNIEnv* env, jobject o))
2465   LINUX_ONLY(return os::Linux::physical_memory();)
2466   return os::physical_memory();
2467 WB_END
2468 
2469 // Physical swap of the host machine (including containers), Linux only.
2470 WB_ENTRY(jlong, WB_HostPhysicalSwap(JNIEnv* env, jobject o))
2471   LINUX_ONLY(return (jlong)os::Linux::host_swap();)
2472   return -1; // Not used/implemented on other platforms
2473 WB_END
2474 
2475 WB_ENTRY(jint, WB_ValidateCgroup(JNIEnv* env,
2476                                     jobject o,
2477                                     jstring proc_cgroups,
2478                                     jstring proc_self_cgroup,
2479                                     jstring proc_self_mountinfo))
2480   jint ret = 0;
2481 #ifdef LINUX
2482   ThreadToNativeFromVM ttnfv(thread);
2483   const char* p_cgroups = env->GetStringUTFChars(proc_cgroups, nullptr);
2484   CHECK_JNI_EXCEPTION_(env, 0);
2485   const char* p_s_cgroup = env->GetStringUTFChars(proc_self_cgroup, nullptr);
2486   CHECK_JNI_EXCEPTION_(env, 0);
2487   const char* p_s_mountinfo = env->GetStringUTFChars(proc_self_mountinfo, nullptr);
2488   CHECK_JNI_EXCEPTION_(env, 0);
2489   u1 cg_type_flags = 0;
2490   // This sets cg_type_flags
2491   WhiteBox::validate_cgroup(p_cgroups, p_s_cgroup, p_s_mountinfo, &cg_type_flags);
2492   ret = (jint)cg_type_flags;
2493   env->ReleaseStringUTFChars(proc_cgroups, p_cgroups);
2494   env->ReleaseStringUTFChars(proc_self_cgroup, p_s_cgroup);
2495   env->ReleaseStringUTFChars(proc_self_mountinfo, p_s_mountinfo);
2496 #endif
2497   return ret;
2498 WB_END
2499 
2500 // Available cpus of the host machine, Linux only.
2501 // Used in container testing.
2502 WB_ENTRY(jint, WB_HostCPUs(JNIEnv* env, jobject o))
2503   LINUX_ONLY(return os::Linux::active_processor_count();)
2504   return -1; // Not used/implemented on other platforms
2505 WB_END
2506 
2507 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2508   os::print_os_info(tty);
2509 WB_END
2510 
2511 // Elf decoder
2512 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2513 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2514   ElfFile::_do_not_cache_elf_section = true;
2515 #endif
2516 WB_END
2517 
2518 WB_ENTRY(jlong, WB_ResolvedMethodItemsCount(JNIEnv* env, jobject o))
2519   return (jlong) ResolvedMethodTable::items_count();
2520 WB_END
2521 
2522 WB_ENTRY(jint, WB_ProtectionDomainRemovedCount(JNIEnv* env, jobject o))
2523   return (jint) ProtectionDomainCacheTable::removed_entries_count();
2524 WB_END
2525 
2526 WB_ENTRY(jint, WB_GetKlassMetadataSize(JNIEnv* env, jobject wb, jclass mirror))
2527   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(mirror));
2528   // Return size in bytes.
2529   return k->size() * wordSize;
2530 WB_END
2531 
2532 // See test/hotspot/jtreg/runtime/Thread/ThreadObjAccessAtExit.java.
2533 // It explains how the thread's priority field is used for test state coordination.
2534 //
2535 WB_ENTRY(void, WB_CheckThreadObjOfTerminatingThread(JNIEnv* env, jobject wb, jobject target_handle))
2536   oop target_oop = JNIHandles::resolve_non_null(target_handle);
2537   jlong tid = java_lang_Thread::thread_id(target_oop);
2538   JavaThread* target = java_lang_Thread::thread(target_oop);
2539 
2540   // Grab a ThreadsListHandle to protect the target thread whilst terminating
2541   ThreadsListHandle tlh;
2542 
2543   // Look up the target thread by tid to ensure it is present
2544   JavaThread* t = tlh.list()->find_JavaThread_from_java_tid(tid);
2545   if (t == nullptr) {
2546     THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread not found in ThreadsList!");
2547   }
2548 
2549   tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is protected");
2550   // Allow target to terminate by boosting priority
2551   java_lang_Thread::set_priority(t->threadObj(), ThreadPriority(NormPriority + 1));
2552 
2553   // Now wait for the target to terminate
2554   while (!target->is_terminated()) {
2555     ThreadBlockInVM tbivm(thread);  // just in case target is involved in a safepoint
2556     os::naked_short_sleep(0);
2557   }
2558 
2559   tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is terminated");
2560 
2561   // Now release the GC inducing thread - we have to re-resolve the external oop that
2562   // was passed in as GC may have occurred and we don't know if we can trust t->threadObj() now.
2563   oop original = JNIHandles::resolve_non_null(target_handle);
2564   java_lang_Thread::set_priority(original, ThreadPriority(NormPriority + 2));
2565 
2566   tty->print_cr("WB_CheckThreadObjOfTerminatingThread: GC has been initiated - checking threadObj:");
2567 
2568   // The Java code should be creating garbage and triggering GC, which would potentially move
2569   // the threadObj oop. If the exiting thread is properly protected then its threadObj should
2570   // remain valid and equal to our initial target_handle. Loop a few times to give GC a chance to
2571   // kick in.
2572   for (int i = 0; i < 5; i++) {
2573     oop original = JNIHandles::resolve_non_null(target_handle);
2574     oop current = t->threadObj();
2575     if (original != current) {
2576       tty->print_cr("WB_CheckThreadObjOfTerminatingThread: failed comparison on iteration %d", i);
2577       THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread oop has changed!");
2578     } else {
2579       tty->print_cr("WB_CheckThreadObjOfTerminatingThread: successful comparison on iteration %d", i);
2580       ThreadBlockInVM tbivm(thread);
2581       os::naked_short_sleep(50);
2582     }
2583   }
2584 WB_END
2585 
2586 WB_ENTRY(void, WB_VerifyFrames(JNIEnv* env, jobject wb, jboolean log, jboolean update_map))
2587   ResourceMark rm; // for verify
2588   stringStream st;
2589   for (StackFrameStream fst(JavaThread::current(), update_map, true); !fst.is_done(); fst.next()) {
2590     frame* current_frame = fst.current();
2591     if (log) {
2592       current_frame->print_value_on(&st);
2593     }
2594     current_frame->verify(fst.register_map());
2595   }
2596   if (log) {
2597     tty->print_cr("[WhiteBox::VerifyFrames] Walking Frames");
2598     tty->print_raw(st.freeze());
2599     tty->print_cr("[WhiteBox::VerifyFrames] Done");
2600   }
2601 WB_END
2602 
2603 WB_ENTRY(jboolean, WB_IsJVMTIIncluded(JNIEnv* env, jobject wb))
2604 #if INCLUDE_JVMTI
2605   return JNI_TRUE;
2606 #else
2607   return JNI_FALSE;
2608 #endif
2609 WB_END
2610 
2611 WB_ENTRY(void, WB_WaitUnsafe(JNIEnv* env, jobject wb, jint time))
2612     os::naked_short_sleep(time);
2613 WB_END
2614 
2615 WB_ENTRY(jstring, WB_GetLibcName(JNIEnv* env, jobject o))
2616   ThreadToNativeFromVM ttn(thread);
2617   jstring info_string = env->NewStringUTF(XSTR(LIBC));
2618   CHECK_JNI_EXCEPTION_(env, nullptr);
2619   return info_string;
2620 WB_END
2621 
2622 WB_ENTRY(void, WB_LockCritical(JNIEnv* env, jobject wb))
2623   GCLocker::lock_critical(thread);
2624 WB_END
2625 
2626 WB_ENTRY(void, WB_UnlockCritical(JNIEnv* env, jobject wb))
2627   GCLocker::unlock_critical(thread);
2628 WB_END
2629 
2630 WB_ENTRY(void, WB_PinObject(JNIEnv* env, jobject wb, jobject o))
2631 #if INCLUDE_G1GC
2632   if (!UseG1GC) {
2633     ShouldNotReachHere();
2634     return;
2635   }
2636   oop obj = JNIHandles::resolve(o);
2637   G1CollectedHeap::heap()->pin_object(thread, obj);
2638 #else
2639   ShouldNotReachHere();
2640 #endif // INCLUDE_G1GC
2641 WB_END
2642 
2643 WB_ENTRY(void, WB_UnpinObject(JNIEnv* env, jobject wb, jobject o))
2644 #if INCLUDE_G1GC
2645   if (!UseG1GC) {
2646     ShouldNotReachHere();
2647     return;
2648   }
2649   oop obj = JNIHandles::resolve(o);
2650   G1CollectedHeap::heap()->unpin_object(thread, obj);
2651 #else
2652   ShouldNotReachHere();
2653 #endif // INCLUDE_G1GC
2654 WB_END
2655 
2656 WB_ENTRY(jboolean, WB_SetVirtualThreadsNotifyJvmtiMode(JNIEnv* env, jobject wb, jboolean enable))
2657   if (!Continuations::enabled()) {
2658     tty->print_cr("WB error: must be Continuations::enabled()!");
2659     return JNI_FALSE;
2660   }
2661   jboolean result = false;
2662 #if INCLUDE_JVMTI
2663   if (enable) {
2664     result = JvmtiEnvBase::enable_virtual_threads_notify_jvmti();
2665   } else {
2666     result = JvmtiEnvBase::disable_virtual_threads_notify_jvmti();
2667   }
2668 #endif
2669   return result;
2670 WB_END
2671 
2672 WB_ENTRY(void, WB_PreTouchMemory(JNIEnv* env, jobject wb, jlong addr, jlong size))
2673   void* const from = (void*)addr;
2674   void* const to = (void*)(addr + size);
2675   if (from > to) {
2676     os::pretouch_memory(from, to, os::vm_page_size());
2677   }
2678 WB_END
2679 
2680 WB_ENTRY(void, WB_CleanMetaspaces(JNIEnv* env, jobject target))
2681   ClassLoaderDataGraph::safepoint_and_clean_metaspaces();
2682 WB_END
2683 
2684 // Reports resident set size (RSS) in bytes
2685 WB_ENTRY(jlong, WB_Rss(JNIEnv* env, jobject o))
2686   return os::rss();
2687 WB_END
2688 
2689 #define CC (char*)
2690 
2691 static JNINativeMethod methods[] = {
2692   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
2693   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
2694   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
2695   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
2696   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
2697   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
2698   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
2699   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
2700   {CC"getHeapAlignment",                 CC"()J",                   (void*)&WB_GetHeapAlignment},
2701   {CC"countAliveClasses0",               CC"(Ljava/lang/String;)I", (void*)&WB_CountAliveClasses },
2702   {CC"getSymbolRefcount",                CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2703   {CC"parseCommandLine0",
2704       CC"(Ljava/lang/String;C[Ljdk/test/whitebox/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2705       (void*) &WB_ParseCommandLine
2706   },
2707   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2708                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
2709   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
2710                                                       (void*)&WB_AddToSystemClassLoaderSearch},
2711   {CC"getCompressedOopsMaxHeapSize", CC"()J",
2712       (void*)&WB_GetCompressedOopsMaxHeapSize},
2713   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
2714   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
2715   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
2716 #if INCLUDE_CDS
2717   {CC"getCDSOffsetForName0", CC"(Ljava/lang/String;)I",  (void*)&WB_GetCDSOffsetForName},
2718   {CC"getCDSConstantForName0", CC"(Ljava/lang/String;)I",  (void*)&WB_GetCDSConstantForName},
2719 #endif
2720 #if INCLUDE_G1GC
2721   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
2722   {CC"g1CompletedConcurrentMarkCycles", CC"()I",      (void*)&WB_G1CompletedConcurrentMarkCycles},
2723   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
2724   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
2725   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
2726   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
2727   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
2728   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
2729   {CC"g1HasRegionsToUncommit",  CC"()Z",              (void*)&WB_G1HasRegionsToUncommit},
2730   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2731                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
2732   {CC"g1ActiveMemoryNodeCount", CC"()I",              (void*)&WB_G1ActiveMemoryNodeCount },
2733   {CC"g1MemoryNodeIds",    CC"()[I",                  (void*)&WB_G1MemoryNodeIds },
2734   {CC"g1GetMixedGCInfo",   CC"(I)[J",                 (void*)&WB_G1GetMixedGCInfo },
2735 #endif // INCLUDE_G1GC
2736 #if INCLUDE_PARALLELGC
2737   {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
2738   {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
2739 #endif
2740   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
2741   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
2742   {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J",   (void*)&WB_NMTMallocWithPseudoStackAndType},
2743   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
2744   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
2745   {CC"NMTAttemptReserveMemoryAt",    CC"(JJ)J",       (void*)&WB_NMTAttemptReserveMemoryAt },
2746   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
2747   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
2748   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
2749   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
2750   {CC"NMTNewArena",         CC"(J)J",                 (void*)&WB_NMTNewArena        },
2751   {CC"NMTFreeArena",        CC"(J)V",                 (void*)&WB_NMTFreeArena       },
2752   {CC"NMTArenaMalloc",      CC"(JJ)V",                (void*)&WB_NMTArenaMalloc     },
2753   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
2754   {CC"isFrameDeoptimized", CC"(I)Z",                  (void*)&WB_IsFrameDeoptimized},
2755   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
2756   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
2757                                                       (void*)&WB_DeoptimizeMethod  },
2758   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
2759                                                       (void*)&WB_IsMethodCompiled  },
2760   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
2761                                                       (void*)&WB_IsMethodCompilable},
2762   {CC"isMethodQueuedForCompilation0",
2763       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
2764   {CC"isIntrinsicAvailable0",
2765       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
2766                                                       (void*)&WB_IsIntrinsicAvailable},
2767   {CC"makeMethodNotCompilable0",
2768       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
2769   {CC"testSetDontInlineMethod0",
2770       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
2771   {CC"getMethodCompilationLevel0",
2772       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
2773   {CC"getMethodDecompileCount0",
2774       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodDecompileCount},
2775   {CC"getMethodTrapCount0",
2776       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2777                                                       (void*)&WB_GetMethodTrapCount},
2778   {CC"getDeoptCount0",
2779       CC"(Ljava/lang/String;Ljava/lang/String;)I",    (void*)&WB_GetDeoptCount},
2780   {CC"getMethodEntryBci0",
2781       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
2782   {CC"getCompileQueueSize",
2783       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
2784   {CC"testSetForceInlineMethod0",
2785       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
2786   {CC"enqueueMethodForCompilation0",
2787       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
2788   {CC"enqueueInitializerForCompilation0",
2789       CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
2790   {CC"markMethodProfiled",
2791       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_MarkMethodProfiled},
2792   {CC"clearMethodState0",
2793       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
2794   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
2795   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
2796   {CC"matchesMethod",
2797       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2798                                                       (void*)&WB_MatchesMethod},
2799   {CC"matchesInline",
2800       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2801                                                       (void*)&WB_MatchesInline},
2802   {CC"shouldPrintAssembly",
2803         CC"(Ljava/lang/reflect/Executable;I)Z",
2804                                                         (void*)&WB_ShouldPrintAssembly},
2805 
2806   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
2807   {CC"isDefaultVMFlag",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsDefaultVMFlag},
2808   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
2809   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
2810   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
2811   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
2812   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
2813   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
2814   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
2815   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
2816   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
2817   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
2818                                                       (void*)&WB_SetStringVMFlag},
2819   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
2820                                                       (void*)&WB_GetBooleanVMFlag},
2821   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
2822                                                       (void*)&WB_GetIntVMFlag},
2823   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
2824                                                       (void*)&WB_GetUintVMFlag},
2825   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
2826                                                       (void*)&WB_GetIntxVMFlag},
2827   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
2828                                                       (void*)&WB_GetUintxVMFlag},
2829   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
2830                                                       (void*)&WB_GetUint64VMFlag},
2831   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
2832                                                       (void*)&WB_GetSizeTVMFlag},
2833   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
2834                                                       (void*)&WB_GetDoubleVMFlag},
2835   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
2836                                                       (void*)&WB_GetStringVMFlag},
2837   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
2838   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
2839   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
2840   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
2841   {CC"allocateMetaspace",
2842      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
2843   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
2844   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
2845   {CC"metaspaceSharedRegionAlignment", CC"()J",       (void*)&WB_MetaspaceSharedRegionAlignment },
2846   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
2847   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
2848                                                       (void*)&WB_GetNMethod         },
2849   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
2850   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
2851   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
2852   {CC"getCompilationActivityMode",
2853                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
2854   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
2855                                                       (void*)&WB_GetMethodData      },
2856   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
2857   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
2858   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
2859   {CC"DefineModule",       CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
2860                                                       (void*)&WB_DefineModule },
2861   {CC"AddModuleExports",   CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
2862                                                       (void*)&WB_AddModuleExports },
2863   {CC"AddReadsModule",     CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
2864                                                       (void*)&WB_AddReadsModule },
2865   {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2866                                                       (void*)&WB_AddModuleExportsToAllUnnamed },
2867   {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2868                                                       (void*)&WB_AddModuleExportsToAll },
2869   {CC"deflateIdleMonitors", CC"()Z",                  (void*)&WB_DeflateIdleMonitors },
2870   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
2871   {CC"getInUseMonitorCount", CC"()J", (void*)&WB_getInUseMonitorCount  },
2872   {CC"getLockStackCapacity", CC"()I",                 (void*)&WB_getLockStackCapacity },
2873   {CC"supportsRecursiveLightweightLocking", CC"()Z",  (void*)&WB_supportsRecursiveLightweightLocking },
2874   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
2875   {CC"forceClassLoaderStatsSafepoint", CC"()V",       (void*)&WB_ForceClassLoaderStatsSafepoint },
2876   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
2877   {CC"getResolvedReferences0", CC"(Ljava/lang/Class;)[Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
2878   {CC"getFieldEntriesLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_getFieldEntriesLength},
2879   {CC"getFieldCPIndex0",    CC"(Ljava/lang/Class;I)I", (void*)&WB_getFieldCPIndex},
2880   {CC"getMethodEntriesLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_getMethodEntriesLength},
2881   {CC"getMethodCPIndex0",    CC"(Ljava/lang/Class;I)I", (void*)&WB_getMethodCPIndex},
2882   {CC"getIndyInfoLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_getIndyInfoLength},
2883   {CC"getIndyCPIndex0",    CC"(Ljava/lang/Class;I)I", (void*)&WB_getIndyCPIndex},
2884   {CC"printClasses0",      CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printClasses},
2885   {CC"printMethods0",      CC"(Ljava/lang/String;Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printMethods},
2886   {CC"getMethodBooleanOption",
2887       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
2888                                                       (void*)&WB_GetMethodBooleaneOption},
2889   {CC"getMethodIntxOption",
2890       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2891                                                       (void*)&WB_GetMethodIntxOption},
2892   {CC"getMethodUintxOption",
2893       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2894                                                       (void*)&WB_GetMethodUintxOption},
2895   {CC"getMethodDoubleOption",
2896       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
2897                                                       (void*)&WB_GetMethodDoubleOption},
2898   {CC"getMethodStringOption",
2899       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
2900                                                       (void*)&WB_GetMethodStringOption},
2901   {CC"getDefaultArchivePath",             CC"()Ljava/lang/String;",
2902                                                       (void*)&WB_GetDefaultArchivePath},
2903   {CC"getCDSGenericHeaderMinVersion",     CC"()I",    (void*)&WB_GetCDSGenericHeaderMinVersion},
2904   {CC"getCurrentCDSVersion",              CC"()I",    (void*)&WB_GetCDSCurrentVersion},
2905   {CC"isSharingEnabled",   CC"()Z",                   (void*)&WB_IsSharingEnabled},
2906   {CC"isSharedInternedString", CC"(Ljava/lang/String;)Z", (void*)&WB_IsSharedInternedString },
2907   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
2908   {CC"areSharedStringsMapped",            CC"()Z",    (void*)&WB_AreSharedStringsMapped },
2909   {CC"linkClass",          CC"(Ljava/lang/Class;)V",  (void*)&WB_LinkClass},
2910   {CC"areOpenArchiveHeapObjectsMapped",   CC"()Z",    (void*)&WB_AreOpenArchiveHeapObjectsMapped},
2911   {CC"isCDSIncluded",                     CC"()Z",    (void*)&WB_IsCDSIncluded },
2912   {CC"isJFRIncluded",                     CC"()Z",    (void*)&WB_IsJFRIncluded },
2913   {CC"isDTraceIncluded",                  CC"()Z",    (void*)&WB_IsDTraceIncluded },
2914   {CC"hasLibgraal",                       CC"()Z",    (void*)&WB_HasLibgraal },
2915   {CC"isC2OrJVMCIIncluded",               CC"()Z",    (void*)&WB_isC2OrJVMCIIncluded },
2916   {CC"isJVMCISupportedByGC",              CC"()Z",    (void*)&WB_IsJVMCISupportedByGC},
2917   {CC"canWriteJavaHeapArchive",           CC"()Z",    (void*)&WB_CanWriteJavaHeapArchive },
2918   {CC"cdsMemoryMappingFailed",            CC"()Z",    (void*)&WB_CDSMemoryMappingFailed },
2919 
2920   {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
2921   {CC"handshakeReadMonitors", CC"(Ljava/lang/Thread;)Z", (void*)&WB_HandshakeReadMonitors },
2922   {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
2923   {CC"asyncHandshakeWalkStack", CC"(Ljava/lang/Thread;)V", (void*)&WB_AsyncHandshakeWalkStack },
2924   {CC"lockAndBlock", CC"(Z)V",                        (void*)&WB_LockAndBlock},
2925   {CC"checkThreadObjOfTerminatingThread", CC"(Ljava/lang/Thread;)V", (void*)&WB_CheckThreadObjOfTerminatingThread },
2926   {CC"verifyFrames",                CC"(ZZ)V",            (void*)&WB_VerifyFrames },
2927   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
2928                                                       (void*)&WB_AddCompilerDirective },
2929   {CC"removeCompilerDirective",   CC"(I)V",           (void*)&WB_RemoveCompilerDirective },
2930   {CC"isGCSupported",             CC"(I)Z",           (void*)&WB_IsGCSupported},
2931   {CC"isGCSupportedByJVMCICompiler", CC"(I)Z",        (void*)&WB_IsGCSupportedByJVMCICompiler},
2932   {CC"isGCSelected",              CC"(I)Z",           (void*)&WB_IsGCSelected},
2933   {CC"isGCSelectedErgonomically", CC"()Z",            (void*)&WB_IsGCSelectedErgonomically},
2934   {CC"supportsConcurrentGCBreakpoints", CC"()Z",      (void*)&WB_SupportsConcurrentGCBreakpoints},
2935   {CC"concurrentGCAcquireControl0", CC"()V",          (void*)&WB_ConcurrentGCAcquireControl},
2936   {CC"concurrentGCReleaseControl0", CC"()V",          (void*)&WB_ConcurrentGCReleaseControl},
2937   {CC"concurrentGCRunToIdle0",    CC"()V",            (void*)&WB_ConcurrentGCRunToIdle},
2938   {CC"concurrentGCRunTo0",        CC"(Ljava/lang/String;)Z",
2939                                                       (void*)&WB_ConcurrentGCRunTo},
2940   {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
2941                                                       (void*)&WB_CheckLibSpecifiesNoexecstack},
2942   {CC"isContainerized",           CC"()Z",            (void*)&WB_IsContainerized },
2943   {CC"validateCgroup",
2944       CC"(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
2945                                                       (void*)&WB_ValidateCgroup },
2946   {CC"hostPhysicalMemory",        CC"()J",            (void*)&WB_HostPhysicalMemory },
2947   {CC"hostPhysicalSwap",          CC"()J",            (void*)&WB_HostPhysicalSwap },
2948   {CC"hostCPUs",                  CC"()I",            (void*)&WB_HostCPUs },
2949   {CC"printOsInfo",               CC"()V",            (void*)&WB_PrintOsInfo },
2950   {CC"disableElfSectionCache",    CC"()V",            (void*)&WB_DisableElfSectionCache },
2951   {CC"resolvedMethodItemsCount",  CC"()J",            (void*)&WB_ResolvedMethodItemsCount },
2952   {CC"protectionDomainRemovedCount",   CC"()I",       (void*)&WB_ProtectionDomainRemovedCount },
2953   {CC"getKlassMetadataSize", CC"(Ljava/lang/Class;)I",(void*)&WB_GetKlassMetadataSize},
2954 
2955   {CC"createMetaspaceTestContext", CC"(JJ)J",         (void*)&WB_CreateMetaspaceTestContext},
2956   {CC"destroyMetaspaceTestContext", CC"(J)V",         (void*)&WB_DestroyMetaspaceTestContext},
2957   {CC"purgeMetaspaceTestContext", CC"(J)V",           (void*)&WB_PurgeMetaspaceTestContext},
2958   {CC"printMetaspaceTestContext", CC"(J)V",           (void*)&WB_PrintMetaspaceTestContext},
2959   {CC"getTotalCommittedWordsInMetaspaceTestContext", CC"(J)J",(void*)&WB_GetTotalCommittedWordsInMetaspaceTestContext},
2960   {CC"getTotalUsedWordsInMetaspaceTestContext", CC"(J)J", (void*)&WB_GetTotalUsedWordsInMetaspaceTestContext},
2961   {CC"createArenaInTestContext", CC"(JZ)J",           (void*)&WB_CreateArenaInTestContext},
2962   {CC"destroyMetaspaceTestArena", CC"(J)V",           (void*)&WB_DestroyMetaspaceTestArena},
2963   {CC"allocateFromMetaspaceTestArena", CC"(JJ)J",     (void*)&WB_AllocateFromMetaspaceTestArena},
2964   {CC"deallocateToMetaspaceTestArena", CC"(JJJ)V",    (void*)&WB_DeallocateToMetaspaceTestArena},
2965   {CC"maxMetaspaceAllocationSize", CC"()J",           (void*)&WB_GetMaxMetaspaceAllocationSize},
2966 
2967   {CC"isJVMTIIncluded", CC"()Z",                      (void*)&WB_IsJVMTIIncluded},
2968   {CC"waitUnsafe", CC"(I)V",                          (void*)&WB_WaitUnsafe},
2969   {CC"getLibcName",     CC"()Ljava/lang/String;",     (void*)&WB_GetLibcName},
2970 
2971   {CC"lockCritical",    CC"()V",                      (void*)&WB_LockCritical},
2972   {CC"unlockCritical",  CC"()V",                      (void*)&WB_UnlockCritical},
2973   {CC"pinObject",       CC"(Ljava/lang/Object;)V",    (void*)&WB_PinObject},
2974   {CC"unpinObject",     CC"(Ljava/lang/Object;)V",    (void*)&WB_UnpinObject},
2975   {CC"setVirtualThreadsNotifyJvmtiMode", CC"(Z)Z",    (void*)&WB_SetVirtualThreadsNotifyJvmtiMode},
2976   {CC"preTouchMemory",  CC"(JJ)V",                    (void*)&WB_PreTouchMemory},
2977   {CC"cleanMetaspaces", CC"()V",                      (void*)&WB_CleanMetaspaces},
2978   {CC"rss", CC"()J",                                  (void*)&WB_Rss},
2979   {CC"printString", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_PrintString},
2980 };
2981 
2982 
2983 #undef CC
2984 
2985 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
2986   {
2987     if (WhiteBoxAPI) {
2988       // Make sure that wbclass is loaded by the null classloader
2989       InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(wbclass)));
2990       Handle loader(THREAD, ik->class_loader());
2991       if (loader.is_null()) {
2992         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
2993         WhiteBox::set_used();
2994       }
2995     }
2996   }
2997 JVM_END