1 /*
   2  * Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 
  27 #include <new>
  28 
  29 #include "classfile/classLoaderDataGraph.hpp"
  30 #include "classfile/modules.hpp"
  31 #include "classfile/protectionDomainCache.hpp"
  32 #include "classfile/stringTable.hpp"
  33 #include "code/codeCache.hpp"
  34 #include "compiler/methodMatcher.hpp"
  35 #include "compiler/directivesParser.hpp"
  36 #include "gc/shared/gcConfig.hpp"
  37 #include "gc/shared/genCollectedHeap.hpp"
  38 #include "jvmtifiles/jvmtiEnv.hpp"
  39 #include "memory/heapShared.inline.hpp"
  40 #include "memory/metaspaceShared.hpp"
  41 #include "memory/metadataFactory.hpp"
  42 #include "memory/iterator.hpp"
  43 #include "memory/resourceArea.hpp"
  44 #include "memory/universe.hpp"
  45 #include "memory/oopFactory.hpp"
  46 #include "oops/array.hpp"
  47 #include "oops/constantPool.inline.hpp"
  48 #include "oops/method.inline.hpp"
  49 #include "oops/objArrayKlass.hpp"
  50 #include "oops/objArrayOop.inline.hpp"
  51 #include "oops/oop.inline.hpp"
  52 #include "oops/typeArrayOop.inline.hpp"
  53 #include "prims/resolvedMethodTable.hpp"
  54 #include "prims/wbtestmethods/parserTests.hpp"
  55 #include "prims/whitebox.inline.hpp"
  56 #include "runtime/arguments.hpp"
  57 #include "runtime/compilationPolicy.hpp"
  58 #include "runtime/deoptimization.hpp"
  59 #include "runtime/fieldDescriptor.inline.hpp"
  60 #include "runtime/flags/jvmFlag.hpp"
  61 #include "runtime/frame.inline.hpp"
  62 #include "runtime/handshake.hpp"
  63 #include "runtime/interfaceSupport.inline.hpp"
  64 #include "runtime/javaCalls.hpp"
  65 #include "runtime/jniHandles.inline.hpp"
  66 #include "runtime/os.hpp"
  67 #include "runtime/sweeper.hpp"
  68 #include "runtime/thread.hpp"
  69 #include "runtime/threadSMR.hpp"
  70 #include "runtime/vm_version.hpp"
  71 #include "services/memoryService.hpp"
  72 #include "utilities/align.hpp"
  73 #include "utilities/debug.hpp"
  74 #include "utilities/elfFile.hpp"
  75 #include "utilities/exceptions.hpp"
  76 #include "utilities/macros.hpp"
  77 #if INCLUDE_CDS
  78 #include "prims/cdsoffsets.hpp"
  79 #endif // INCLUDE_CDS
  80 #if INCLUDE_G1GC
  81 #include "gc/g1/g1CollectedHeap.inline.hpp"
  82 #include "gc/g1/g1ConcurrentMark.hpp"
  83 #include "gc/g1/g1ConcurrentMarkThread.hpp"
  84 #include "gc/g1/heapRegionRemSet.hpp"
  85 #include "gc/g1/heterogeneousHeapRegionManager.hpp"
  86 #endif // INCLUDE_G1GC
  87 #if INCLUDE_PARALLELGC
  88 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
  89 #include "gc/parallel/adjoiningGenerations.hpp"
  90 #endif // INCLUDE_PARALLELGC
  91 #if INCLUDE_NMT
  92 #include "services/mallocSiteTable.hpp"
  93 #include "services/memTracker.hpp"
  94 #include "utilities/nativeCallStack.hpp"
  95 #endif // INCLUDE_NMT
  96 #if INCLUDE_AOT
  97 #include "aot/aotLoader.hpp"
  98 #endif // INCLUDE_AOT
  99 
 100 #ifdef LINUX
 101 #include "osContainer_linux.hpp"
 102 #endif
 103 
 104 #define SIZE_T_MAX_VALUE ((size_t) -1)
 105 
 106 #define CHECK_JNI_EXCEPTION_(env, value)                               \
 107   do {                                                                 \
 108     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
 109     THREAD->clear_pending_jni_exception_check();                       \
 110     if (HAS_PENDING_EXCEPTION) {                                       \
 111       return(value);                                                   \
 112     }                                                                  \
 113   } while (0)
 114 
 115 #define CHECK_JNI_EXCEPTION(env)                                       \
 116   do {                                                                 \
 117     JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
 118     THREAD->clear_pending_jni_exception_check();                       \
 119     if (HAS_PENDING_EXCEPTION) {                                       \
 120       return;                                                          \
 121     }                                                                  \
 122   } while (0)
 123 
 124 bool WhiteBox::_used = false;
 125 volatile bool WhiteBox::compilation_locked = false;
 126 
 127 class VM_WhiteBoxOperation : public VM_Operation {
 128  public:
 129   VM_WhiteBoxOperation()                         { }
 130   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
 131   bool allow_nested_vm_operations() const        { return true; }
 132 };
 133 
 134 
 135 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
 136   return (jlong)(void*)JNIHandles::resolve(obj);
 137 WB_END
 138 
 139 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
 140   return heapOopSize;
 141 WB_END
 142 
 143 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
 144   return os::vm_page_size();
 145 WB_END
 146 
 147 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
 148   return os::vm_allocation_granularity();
 149 WB_END
 150 
 151 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
 152   return os::large_page_size();
 153 WB_END
 154 
 155 class WBIsKlassAliveClosure : public LockedClassesDo {
 156     Symbol* _name;
 157     bool _found;
 158 public:
 159     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
 160 
 161     void do_klass(Klass* k) {
 162       if (_found) return;
 163       Symbol* ksym = k->name();
 164       if (ksym->fast_compare(_name) == 0) {
 165         _found = true;
 166       }
 167     }
 168 
 169     bool found() const {
 170         return _found;
 171     }
 172 };
 173 
 174 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
 175   oop h_name = JNIHandles::resolve(name);
 176   if (h_name == NULL) return false;
 177   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
 178   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 179 
 180   WBIsKlassAliveClosure closure(sym);
 181   ClassLoaderDataGraph::classes_do(&closure);
 182 
 183   return closure.found();
 184 WB_END
 185 
 186 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
 187   oop h_name = JNIHandles::resolve(name);
 188   if (h_name == NULL) return false;
 189   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_0);
 190   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 191   return (jint)sym->refcount();
 192 WB_END
 193 
 194 
 195 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 196 #if INCLUDE_JVMTI
 197   ResourceMark rm;
 198   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 199   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 200   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 201   assert(err == JVMTI_ERROR_NONE, "must not fail");
 202 #endif
 203 }
 204 WB_END
 205 
 206 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 207 #if INCLUDE_JVMTI
 208   ResourceMark rm;
 209   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 210   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 211   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 212   assert(err == JVMTI_ERROR_NONE, "must not fail");
 213 #endif
 214 }
 215 WB_END
 216 
 217 
 218 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 219   return (jlong)Arguments::max_heap_for_compressed_oops();
 220 }
 221 WB_END
 222 
 223 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 224   CollectorPolicy * p = Universe::heap()->collector_policy();
 225   tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
 226     SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
 227     p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
 228     p->space_alignment(), p->heap_alignment());
 229 }
 230 WB_END
 231 
 232 #ifndef PRODUCT
 233 // Forward declaration
 234 void TestReservedSpace_test();
 235 void TestReserveMemorySpecial_test();
 236 void TestVirtualSpace_test();
 237 void TestMetaspaceUtils_test();
 238 #endif
 239 
 240 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 241 #ifndef PRODUCT
 242   TestReservedSpace_test();
 243   TestReserveMemorySpecial_test();
 244   TestVirtualSpace_test();
 245   TestMetaspaceUtils_test();
 246 #endif
 247 WB_END
 248 
 249 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 250   size_t granularity = os::vm_allocation_granularity();
 251   ReservedHeapSpace rhs(100 * granularity, granularity, false);
 252   VirtualSpace vs;
 253   vs.initialize(rhs, 50 * granularity);
 254 
 255   // Check if constraints are complied
 256   if (!( UseCompressedOops && rhs.base() != NULL &&
 257          Universe::narrow_oop_base() != NULL &&
 258          Universe::narrow_oop_use_implicit_null_checks() )) {
 259     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 260                   "\tUseCompressedOops is %d\n"
 261                   "\trhs.base() is " PTR_FORMAT "\n"
 262                   "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
 263                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
 264                   UseCompressedOops,
 265                   p2i(rhs.base()),
 266                   p2i(Universe::narrow_oop_base()),
 267                   Universe::narrow_oop_use_implicit_null_checks());
 268     return;
 269   }
 270   tty->print_cr("Reading from no access area... ");
 271   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 272                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 273 WB_END
 274 
 275 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 276                                            size_t magnitude, size_t iterations) {
 277   size_t granularity = os::vm_allocation_granularity();
 278   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
 279   VirtualSpace vs;
 280   if (!vs.initialize(rhs, 0)) {
 281     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 282     return 3;
 283   }
 284 
 285   int seed = os::random();
 286   tty->print_cr("Random seed is %d", seed);
 287   os::init_random(seed);
 288 
 289   for (size_t i = 0; i < iterations; i++) {
 290 
 291     // Whether we will shrink or grow
 292     bool shrink = os::random() % 2L == 0;
 293 
 294     // Get random delta to resize virtual space
 295     size_t delta = (size_t)os::random() % magnitude;
 296 
 297     // If we are about to shrink virtual space below zero, then expand instead
 298     if (shrink && vs.committed_size() < delta) {
 299       shrink = false;
 300     }
 301 
 302     // Resizing by delta
 303     if (shrink) {
 304       vs.shrink_by(delta);
 305     } else {
 306       // If expanding fails expand_by will silently return false
 307       vs.expand_by(delta, true);
 308     }
 309   }
 310   return 0;
 311 }
 312 
 313 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 314         jlong reserved_space_size, jlong magnitude, jlong iterations))
 315   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 316                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 317                 iterations);
 318   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 319     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 320     return 1;
 321   }
 322 
 323   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 324   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 325   if (sizeof(size_t) < sizeof(jlong)) {
 326     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 327     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 328         || iterations > size_t_max_value) {
 329       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 330       return 2;
 331     }
 332   }
 333 
 334   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 335                                         (size_t) magnitude, (size_t) iterations);
 336 WB_END
 337 
 338 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
 339   return GCConfig::is_gc_supported((CollectedHeap::Name)name);
 340 WB_END
 341 
 342 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
 343   return GCConfig::is_gc_selected((CollectedHeap::Name)name);
 344 WB_END
 345 
 346 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
 347   return GCConfig::is_gc_selected_ergonomically();
 348 WB_END
 349 
 350 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 351   oop p = JNIHandles::resolve(obj);
 352 #if INCLUDE_G1GC
 353   if (UseG1GC) {
 354     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 355     const HeapRegion* hr = g1h->heap_region_containing(p);
 356     if (hr == NULL) {
 357       return false;
 358     }
 359     return !(hr->is_young());
 360   }
 361 #endif
 362 #if INCLUDE_PARALLELGC
 363   if (UseParallelGC) {
 364     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 365     return !psh->is_in_young(p);
 366   }
 367 #endif
 368 #if INCLUDE_ZGC
 369   if (UseZGC) {
 370     return Universe::heap()->is_in(p);
 371   }
 372 #endif
 373   GenCollectedHeap* gch = GenCollectedHeap::heap();
 374   return !gch->is_in_young(p);
 375 WB_END
 376 
 377 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 378   oop p = JNIHandles::resolve(obj);
 379   return Universe::heap()->obj_size(p) * HeapWordSize;
 380 WB_END
 381 
 382 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 383   size_t alignment = Universe::heap()->collector_policy()->space_alignment();
 384   return (jlong)alignment;
 385 WB_END
 386 
 387 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
 388   size_t alignment = Universe::heap()->collector_policy()->heap_alignment();
 389   return (jlong)alignment;
 390 WB_END
 391 
 392 WB_ENTRY(jboolean, WB_SupportsConcurrentGCPhaseControl(JNIEnv* env, jobject o))
 393   return Universe::heap()->supports_concurrent_phase_control();
 394 WB_END
 395 
 396 WB_ENTRY(jobjectArray, WB_GetConcurrentGCPhases(JNIEnv* env, jobject o))
 397   const char* const* phases = Universe::heap()->concurrent_phases();
 398   jint nphases = 0;
 399   for ( ; phases[nphases] != NULL; ++nphases) ;
 400 
 401   ResourceMark rm(thread);
 402   ThreadToNativeFromVM ttn(thread);
 403   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
 404   CHECK_JNI_EXCEPTION_(env, NULL);
 405 
 406   jobjectArray result = env->NewObjectArray(nphases, clazz, NULL);
 407   CHECK_JNI_EXCEPTION_(env, NULL);
 408 
 409   // If push fails, return with pending exception.
 410   if (env->PushLocalFrame(nphases) < 0) return NULL;
 411   for (jint i = 0; i < nphases; ++i) {
 412     jstring phase = env->NewStringUTF(phases[i]);
 413     CHECK_JNI_EXCEPTION_(env, NULL);
 414     env->SetObjectArrayElement(result, i, phase);
 415     CHECK_JNI_EXCEPTION_(env, NULL);
 416   }
 417   env->PopLocalFrame(NULL);
 418 
 419   return result;
 420 WB_END
 421 
 422 WB_ENTRY(jboolean, WB_RequestConcurrentGCPhase(JNIEnv* env, jobject o, jstring name))
 423   Handle h_name(THREAD, JNIHandles::resolve(name));
 424   ResourceMark rm;
 425   const char* c_name = java_lang_String::as_utf8_string(h_name());
 426   return Universe::heap()->request_concurrent_phase(c_name);
 427 WB_END
 428 
 429 #if INCLUDE_G1GC
 430 
 431 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 432   if (UseG1GC) {
 433     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 434     oop result = JNIHandles::resolve(obj);
 435     const HeapRegion* hr = g1h->heap_region_containing(result);
 436     return hr->is_humongous();
 437   }
 438   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
 439 WB_END
 440 
 441 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 442   if (UseG1GC) {
 443     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 444     const HeapRegion* hr = g1h->heap_region_containing((void*) addr);
 445     return hr->is_humongous();
 446   }
 447   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
 448 WB_END
 449 
 450 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 451   if (UseG1GC) {
 452     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 453     const HeapRegion* hr = g1h->heap_region_containing((void*) addr);
 454     return hr->is_free();
 455   }
 456   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
 457 WB_END
 458 
 459 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 460   if (UseG1GC) {
 461     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 462     size_t nr = g1h->max_regions();
 463     return (jlong)nr;
 464   }
 465   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
 466 WB_END
 467 
 468 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 469   if (UseG1GC) {
 470     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 471     size_t nr = g1h->num_free_regions();
 472     return (jlong)nr;
 473   }
 474   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
 475 WB_END
 476 
 477 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 478   if (UseG1GC) {
 479     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 480     return g1h->concurrent_mark()->cm_thread()->during_cycle();
 481   }
 482   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
 483 WB_END
 484 
 485 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
 486   if (UseG1GC) {
 487     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 488     if (!g1h->concurrent_mark()->cm_thread()->during_cycle()) {
 489       g1h->collect(GCCause::_wb_conc_mark);
 490       return true;
 491     }
 492     return false;
 493   }
 494   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1StartMarkCycle: G1 GC is not enabled");
 495 WB_END
 496 
 497 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 498   if (UseG1GC) {
 499     return (jint)HeapRegion::GrainBytes;
 500   }
 501   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
 502 WB_END
 503 
 504 #endif // INCLUDE_G1GC
 505 
 506 #if INCLUDE_G1GC || INCLUDE_PARALLELGC
 507 WB_ENTRY(jlong, WB_DramReservedStart(JNIEnv* env, jobject o))
 508 #if INCLUDE_G1GC
 509   if (UseG1GC) {
 510     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 511     if (g1h->g1_collector_policy()->is_hetero_heap()) {
 512       uint start_region = HeterogeneousHeapRegionManager::manager()->start_index_of_dram();
 513       return (jlong)(g1h->base() + start_region * HeapRegion::GrainBytes);
 514     } else {
 515       return (jlong)g1h->base();
 516     }
 517   }
 518 #endif // INCLUDE_G1GC
 519 #if INCLUDE_PARALLELGC
 520   if (UseParallelGC) {
 521     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 522     if (AllocateOldGenAt != NULL) {
 523       MemRegion reserved = ps_heap->young_gen()->reserved();
 524       return (jlong)reserved.start();
 525     } else {
 526       return (jlong)ps_heap->base();
 527     }
 528   }
 529 #endif // INCLUDE_PARALLELGC
 530   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_DramReservedStart: enabled only for G1 and Parallel GC");
 531 WB_END
 532 
 533 WB_ENTRY(jlong, WB_DramReservedEnd(JNIEnv* env, jobject o))
 534 #if INCLUDE_G1GC
 535   if (UseG1GC) {
 536     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 537     if (g1h->g1_collector_policy()->is_hetero_heap()) {
 538       uint end_region = HeterogeneousHeapRegionManager::manager()->end_index_of_dram();
 539       return (jlong)(g1h->base() + (end_region + 1) * HeapRegion::GrainBytes - 1);
 540     } else {
 541       return (jlong)g1h->base() + g1h->collector_policy()->max_heap_byte_size();
 542     }
 543   }
 544 #endif // INCLUDE_G1GC
 545 #if INCLUDE_PARALLELGC
 546   if (UseParallelGC) {
 547     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 548     if (AllocateOldGenAt != NULL) {
 549       MemRegion reserved = ps_heap->young_gen()->reserved();
 550       return (jlong)reserved.end();
 551     } else {
 552       return (jlong)ps_heap->reserved_region().end();
 553     }
 554   }
 555 #endif // INCLUDE_PARALLELGC
 556   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_DramReservedEnd: enabled only for G1 and Parallel GC");
 557 WB_END
 558 
 559 WB_ENTRY(jlong, WB_NvdimmReservedStart(JNIEnv* env, jobject o))
 560 #if INCLUDE_G1GC
 561   if (UseG1GC) {
 562     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 563     if (g1h->g1_collector_policy()->is_hetero_heap()) {
 564       uint start_region = HeterogeneousHeapRegionManager::manager()->start_index_of_nvdimm();
 565       return (jlong)(g1h->base() + start_region * HeapRegion::GrainBytes);
 566     } else {
 567       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedStart: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 568     }
 569   }
 570 #endif // INCLUDE_G1GC
 571 #if INCLUDE_PARALLELGC
 572   if (UseParallelGC) {
 573     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 574     if (AllocateOldGenAt != NULL) {
 575       MemRegion reserved = ps_heap->old_gen()->reserved();
 576       return (jlong)reserved.start();
 577     } else {
 578       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedStart: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 579     }
 580   }
 581 #endif // INCLUDE_PARALLELGC
 582   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedStart: enabled only for G1 and Parallel GC");
 583 WB_END
 584 
 585 WB_ENTRY(jlong, WB_NvdimmReservedEnd(JNIEnv* env, jobject o))
 586 #if INCLUDE_G1GC
 587   if (UseG1GC) {
 588     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 589     if (g1h->g1_collector_policy()->is_hetero_heap()) {
 590       uint end_region = HeterogeneousHeapRegionManager::manager()->start_index_of_nvdimm();
 591       return (jlong)(g1h->base() + (end_region + 1) * HeapRegion::GrainBytes - 1);
 592     } else {
 593       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedEnd: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 594     }
 595   }
 596 #endif // INCLUDE_G1GC
 597 #if INCLUDE_PARALLELGC
 598   if (UseParallelGC) {
 599     ParallelScavengeHeap* ps_heap = ParallelScavengeHeap::heap();
 600     if (AllocateOldGenAt != NULL) {
 601       MemRegion reserved = ps_heap->old_gen()->reserved();
 602       return (jlong)reserved.end();
 603       } else {
 604       THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedEnd: Old gen is not allocated on NV-DIMM using AllocateOldGenAt flag");
 605     }
 606   }
 607 #endif // INCLUDE_PARALLELGC
 608   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_NvdimmReservedEnd: enabled only for G1 and Parallel GC");
 609 WB_END
 610 
 611 #endif // INCLUDE_G1GC || INCLUDE_PARALLELGC
 612 
 613 #if INCLUDE_PARALLELGC
 614 
 615 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
 616   if (UseParallelGC) {
 617     return ParallelScavengeHeap::heap()->gens()->virtual_spaces()->alignment();
 618   }
 619   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
 620 WB_END
 621 
 622 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
 623   if (UseParallelGC) {
 624     return ParallelScavengeHeap::heap()->generation_alignment();
 625   }
 626   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
 627 WB_END
 628 
 629 #endif // INCLUDE_PARALLELGC
 630 
 631 #if INCLUDE_G1GC
 632 
 633 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 634   if (UseG1GC) {
 635     ResourceMark rm(THREAD);
 636     G1CollectedHeap* g1h = G1CollectedHeap::heap();
 637     MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 638     Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 639     return JNIHandles::make_local(env, h());
 640   }
 641   THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
 642 WB_END
 643 
 644 class OldRegionsLivenessClosure: public HeapRegionClosure {
 645 
 646  private:
 647   const int _liveness;
 648   size_t _total_count;
 649   size_t _total_memory;
 650   size_t _total_memory_to_free;
 651 
 652  public:
 653   OldRegionsLivenessClosure(int liveness) :
 654     _liveness(liveness),
 655     _total_count(0),
 656     _total_memory(0),
 657     _total_memory_to_free(0) { }
 658 
 659     size_t total_count() { return _total_count; }
 660     size_t total_memory() { return _total_memory; }
 661     size_t total_memory_to_free() { return _total_memory_to_free; }
 662 
 663   bool do_heap_region(HeapRegion* r) {
 664     if (r->is_old()) {
 665       size_t prev_live = r->marked_bytes();
 666       size_t live = r->live_bytes();
 667       size_t size = r->used();
 668       size_t reg_size = HeapRegion::GrainBytes;
 669       if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
 670         _total_memory += size;
 671         ++_total_count;
 672         if (size == reg_size) {
 673         // we don't include non-full regions since they are unlikely included in mixed gc
 674         // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
 675           _total_memory_to_free += size - prev_live;
 676         }
 677       }
 678     }
 679     return false;
 680   }
 681 };
 682 
 683 
 684 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
 685   if (!UseG1GC) {
 686     THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
 687   }
 688   if (liveness < 0) {
 689     THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
 690   }
 691 
 692   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 693   OldRegionsLivenessClosure rli(liveness);
 694   g1h->heap_region_iterate(&rli);
 695 
 696   typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
 697   result->long_at_put(0, rli.total_count());
 698   result->long_at_put(1, rli.total_memory());
 699   result->long_at_put(2, rli.total_memory_to_free());
 700   return (jlongArray) JNIHandles::make_local(env, result);
 701 WB_END
 702 
 703 #endif // INCLUDE_G1GC
 704 
 705 #if INCLUDE_NMT
 706 // Alloc memory using the test memory type so that we can use that to see if
 707 // NMT picks it up correctly
 708 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 709   jlong addr = 0;
 710   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 711   return addr;
 712 WB_END
 713 
 714 // Alloc memory with pseudo call stack. The test can create psudo malloc
 715 // allocation site to stress the malloc tracking.
 716 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 717   address pc = (address)(size_t)pseudo_stack;
 718   NativeCallStack stack(&pc, 1);
 719   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 720 WB_END
 721 
 722 // Free the memory allocated by NMTAllocTest
 723 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 724   os::free((void*)(uintptr_t)mem);
 725 WB_END
 726 
 727 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 728   jlong addr = 0;
 729 
 730   addr = (jlong)(uintptr_t)os::reserve_memory(size);
 731   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 732 
 733   return addr;
 734 WB_END
 735 
 736 WB_ENTRY(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
 737   addr = (jlong)(uintptr_t)os::attempt_reserve_memory_at((size_t)size, (char*)(uintptr_t)addr);
 738   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 739 
 740   return addr;
 741 WB_END
 742 
 743 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 744   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 745   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 746 WB_END
 747 
 748 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 749   os::uncommit_memory((char *)(uintptr_t)addr, size);
 750 WB_END
 751 
 752 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 753   os::release_memory((char *)(uintptr_t)addr, size);
 754 WB_END
 755 
 756 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 757   // Test that we can downgrade NMT levels but not upgrade them.
 758   if (MemTracker::tracking_level() == NMT_off) {
 759     MemTracker::transition_to(NMT_off);
 760     return MemTracker::tracking_level() == NMT_off;
 761   } else {
 762     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 763     MemTracker::transition_to(NMT_summary);
 764     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 765 
 766     // Can't go to detail once NMT is set to summary.
 767     MemTracker::transition_to(NMT_detail);
 768     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 769 
 770     // Shutdown sets tracking level to minimal.
 771     MemTracker::shutdown();
 772     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 773 
 774     // Once the tracking level is minimal, we cannot increase to summary.
 775     // The code ignores this request instead of asserting because if the malloc site
 776     // table overflows in another thread, it tries to change the code to summary.
 777     MemTracker::transition_to(NMT_summary);
 778     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 779 
 780     // Really can never go up to detail, verify that the code would never do this.
 781     MemTracker::transition_to(NMT_detail);
 782     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 783     return MemTracker::tracking_level() == NMT_minimal;
 784   }
 785 WB_END
 786 
 787 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 788   int hash_size = MallocSiteTable::hash_buckets();
 789   assert(hash_size > 0, "NMT hash_size should be > 0");
 790   return (jint)hash_size;
 791 WB_END
 792 #endif // INCLUDE_NMT
 793 
 794 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 795   assert(method != NULL, "method should not be null");
 796   ThreadToNativeFromVM ttn(thread);
 797   return env->FromReflectedMethod(method);
 798 }
 799 
 800 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 801 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 802  private:
 803   int _result;
 804   const bool _make_not_entrant;
 805  public:
 806   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 807         _result(0), _make_not_entrant(make_not_entrant) { }
 808   int  result() const { return _result; }
 809 
 810   void doit() {
 811     for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
 812       if (t->has_last_Java_frame()) {
 813         for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
 814           frame* f = fst.current();
 815           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 816             RegisterMap* reg_map = fst.register_map();
 817             Deoptimization::deoptimize(t, *f, reg_map);
 818             if (_make_not_entrant) {
 819                 CompiledMethod* cm = CodeCache::find_compiled(f->pc());
 820                 assert(cm != NULL, "sanity check");
 821                 cm->make_not_entrant();
 822             }
 823             ++_result;
 824           }
 825         }
 826       }
 827     }
 828   }
 829 };
 830 
 831 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 832   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 833   VMThread::execute(&op);
 834   return op.result();
 835 WB_END
 836 
 837 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 838   MutexLockerEx mu(Compile_lock);
 839   CodeCache::mark_all_nmethods_for_deoptimization();
 840   VM_Deoptimize op;
 841   VMThread::execute(&op);
 842 WB_END
 843 
 844 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 845   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 846   int result = 0;
 847   CHECK_JNI_EXCEPTION_(env, result);
 848   MutexLockerEx mu(Compile_lock);
 849   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 850   if (is_osr) {
 851     result += mh->mark_osr_nmethods();
 852   } else if (mh->code() != NULL) {
 853     mh->code()->mark_for_deoptimization();
 854     ++result;
 855   }
 856   result += CodeCache::mark_for_deoptimization(mh());
 857   if (result > 0) {
 858     VM_Deoptimize op;
 859     VMThread::execute(&op);
 860   }
 861   return result;
 862 WB_END
 863 
 864 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 865   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 866   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 867   MutexLockerEx mu(Compile_lock);
 868   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 869   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 870   if (code == NULL) {
 871     return JNI_FALSE;
 872   }
 873   return (code->is_alive() && !code->is_marked_for_deoptimization());
 874 WB_END
 875 
 876 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 877   if (method == NULL || comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 878     return false;
 879   }
 880   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 881   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 882   MutexLockerEx mu(Compile_lock);
 883   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 884   if (is_osr) {
 885     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 886   } else {
 887     return CompilationPolicy::can_be_compiled(mh, comp_level);
 888   }
 889 WB_END
 890 
 891 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 892   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 893   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 894   MutexLockerEx mu(Compile_lock);
 895   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 896   return mh->queued_for_compilation();
 897 WB_END
 898 
 899 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 900   if (compLevel < CompLevel_none || compLevel > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 901     return false; // Intrinsic is not available on a non-existent compilation level.
 902   }
 903   jmethodID method_id, compilation_context_id;
 904   method_id = reflected_method_to_jmid(thread, env, method);
 905   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 906   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 907 
 908   DirectiveSet* directive;
 909   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 910   assert(comp != NULL, "compiler not available");
 911   if (compilation_context != NULL) {
 912     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 913     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 914     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 915     directive = DirectivesStack::getMatchingDirective(cch, comp);
 916   } else {
 917     // Calling with NULL matches default directive
 918     directive = DirectivesStack::getDefaultDirective(comp);
 919   }
 920   bool result = comp->is_intrinsic_available(mh, directive);
 921   DirectivesStack::release(directive);
 922   return result;
 923 WB_END
 924 
 925 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 926   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 927   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 928   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 929   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 930   return (code != NULL ? code->comp_level() : CompLevel_none);
 931 WB_END
 932 
 933 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 934   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 935   CHECK_JNI_EXCEPTION(env);
 936   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 937   if (is_osr) {
 938     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 939   } else {
 940     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 941   }
 942 WB_END
 943 
 944 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 945   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 946   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 947   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 948   CompiledMethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 949   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 950 WB_END
 951 
 952 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 953   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 954   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 955   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 956   bool result = mh->dont_inline();
 957   mh->set_dont_inline(value == JNI_TRUE);
 958   return result;
 959 WB_END
 960 
 961 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 962   if (comp_level == CompLevel_any) {
 963     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 964         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 965   } else {
 966     return CompileBroker::queue_size(comp_level);
 967   }
 968 WB_END
 969 
 970 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 971   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 972   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 973   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 974   bool result = mh->force_inline();
 975   mh->set_force_inline(value == JNI_TRUE);
 976   return result;
 977 WB_END
 978 
 979 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
 980   // Screen for unavailable/bad comp level or null method
 981   AbstractCompiler* comp = CompileBroker::compiler(comp_level);
 982   if (method == NULL) {
 983     tty->print_cr("WB error: request to compile NULL method");
 984     return false;
 985   }
 986   if (comp_level > MIN2((CompLevel) TieredStopAtLevel, CompLevel_highest_tier)) {
 987     tty->print_cr("WB error: invalid compilation level %d", comp_level);
 988     return false;
 989   }
 990   if (comp == NULL) {
 991     tty->print_cr("WB error: no compiler for requested compilation level %d", comp_level);
 992     return false;
 993   }
 994 
 995   // Check if compilation is blocking
 996   methodHandle mh(THREAD, method);
 997   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
 998   bool is_blocking = !directive->BackgroundCompilationOption;
 999   DirectivesStack::release(directive);
1000 
1001   // Compile method and check result
1002   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, THREAD);
1003   MutexLockerEx mu(Compile_lock);
1004   bool is_queued = mh->queued_for_compilation();
1005   if ((!is_blocking && is_queued) || nm != NULL) {
1006     return true;
1007   }
1008   tty->print("WB error: failed to %s compile at level %d method ", is_blocking ? "blocking" : "", comp_level);
1009   mh->print_short_name(tty);
1010   tty->cr();
1011   if (is_blocking && is_queued) {
1012     tty->print_cr("WB error: blocking compilation is still in queue!");
1013   }
1014   return false;
1015 }
1016 
1017 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1018   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1019   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1020   return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1021 WB_END
1022 
1023 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1024   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1025   Method* clinit = ik->class_initializer();
1026   if (clinit == NULL) {
1027     return false;
1028   }
1029   return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1030 WB_END
1031 
1032 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1033   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1034   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1035 
1036   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1037   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
1038   bool result = directive->PrintAssemblyOption;
1039   DirectivesStack::release(directive);
1040 
1041   return result;
1042 WB_END
1043 
1044 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1045   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1046   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1047 
1048   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1049 
1050   ResourceMark rm;
1051   const char* error_msg = NULL;
1052   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1053   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1054 
1055   if (m == NULL) {
1056     assert(error_msg != NULL, "Always have an error message");
1057     tty->print_cr("Got error: %s", error_msg);
1058     return -1; // Pattern failed
1059   }
1060 
1061   // Pattern works - now check if it matches
1062   int result;
1063   if (m->match(mh, InlineMatcher::force_inline)) {
1064     result = 2; // Force inline match
1065   } else if (m->match(mh, InlineMatcher::dont_inline)) {
1066     result = 1; // Dont inline match
1067   } else {
1068     result = 0; // No match
1069   }
1070   delete m;
1071   return result;
1072 WB_END
1073 
1074 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1075   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1076   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1077 
1078   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1079 
1080   ResourceMark rm;
1081   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1082 
1083   const char* error_msg = NULL;
1084 
1085   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
1086   if (m == NULL) {
1087     assert(error_msg != NULL, "Must have error_msg");
1088     tty->print_cr("Got error: %s", error_msg);
1089     return -1;
1090   }
1091 
1092   // Pattern works - now check if it matches
1093   int result = m->matches(mh);
1094   delete m;
1095   assert(result == 0 || result == 1, "Result out of range");
1096   return result;
1097 WB_END
1098 
1099 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1100   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1101   CHECK_JNI_EXCEPTION(env);
1102   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1103   MutexLockerEx mu(Compile_lock);
1104   MethodData* mdo = mh->method_data();
1105   MethodCounters* mcs = mh->method_counters();
1106 
1107   if (mdo != NULL) {
1108     mdo->init();
1109     ResourceMark rm;
1110     int arg_count = mdo->method()->size_of_parameters();
1111     for (int i = 0; i < arg_count; i++) {
1112       mdo->set_arg_modified(i, 0);
1113     }
1114     MutexLockerEx mu(mdo->extra_data_lock());
1115     mdo->clean_method_data(/*always_clean*/true);
1116   }
1117 
1118   mh->clear_not_c1_compilable();
1119   mh->clear_not_c2_compilable();
1120   mh->clear_not_c2_osr_compilable();
1121   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1122   if (mcs != NULL) {
1123     mcs->backedge_counter()->init();
1124     mcs->invocation_counter()->init();
1125     mcs->set_interpreter_invocation_count(0);
1126     mcs->set_interpreter_throwout_count(0);
1127 
1128 #ifdef TIERED
1129     mcs->set_rate(0.0F);
1130     mh->set_prev_event_count(0);
1131     mh->set_prev_time(0);
1132 #endif
1133   }
1134 WB_END
1135 
1136 template <typename T>
1137 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, JVMFlag::Error (*TAt)(const char*, T*, bool, bool)) {
1138   if (name == NULL) {
1139     return false;
1140   }
1141   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1142   const char* flag_name = env->GetStringUTFChars(name, NULL);
1143   CHECK_JNI_EXCEPTION_(env, false);
1144   JVMFlag::Error result = (*TAt)(flag_name, value, true, true);
1145   env->ReleaseStringUTFChars(name, flag_name);
1146   return (result == JVMFlag::SUCCESS);
1147 }
1148 
1149 template <typename T>
1150 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, JVMFlag::Error (*TAtPut)(const char*, T*, JVMFlag::Flags)) {
1151   if (name == NULL) {
1152     return false;
1153   }
1154   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1155   const char* flag_name = env->GetStringUTFChars(name, NULL);
1156   CHECK_JNI_EXCEPTION_(env, false);
1157   JVMFlag::Error result = (*TAtPut)(flag_name, value, JVMFlag::INTERNAL);
1158   env->ReleaseStringUTFChars(name, flag_name);
1159   return (result == JVMFlag::SUCCESS);
1160 }
1161 
1162 template <typename T>
1163 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1164   ResourceMark rm(thread);
1165   jclass clazz = env->FindClass(name->as_C_string());
1166   CHECK_JNI_EXCEPTION_(env, NULL);
1167   jmethodID methodID = env->GetStaticMethodID(clazz,
1168         vmSymbols::valueOf_name()->as_C_string(),
1169         sig->as_C_string());
1170   CHECK_JNI_EXCEPTION_(env, NULL);
1171   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1172   CHECK_JNI_EXCEPTION_(env, NULL);
1173   return result;
1174 }
1175 
1176 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1177   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1178 }
1179 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1180   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1181 }
1182 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1183   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1184 }
1185 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1186   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1187 }*/
1188 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1189   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1190 }
1191 
1192 static JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1193   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1194   const char* flag_name = env->GetStringUTFChars(name, NULL);
1195   CHECK_JNI_EXCEPTION_(env, NULL);
1196   JVMFlag* result = JVMFlag::find_flag(flag_name, strlen(flag_name), true, true);
1197   env->ReleaseStringUTFChars(name, flag_name);
1198   return result;
1199 }
1200 
1201 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1202   JVMFlag* flag = getVMFlag(thread, env, name);
1203   return (flag != NULL) && flag->is_constant_in_binary();
1204 WB_END
1205 
1206 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1207   JVMFlag* flag = getVMFlag(thread, env, name);
1208   return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
1209 WB_END
1210 
1211 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1212   bool result;
1213   if (GetVMFlag <bool> (thread, env, name, &result, &JVMFlag::boolAt)) {
1214     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1215     return booleanBox(thread, env, result);
1216   }
1217   return NULL;
1218 WB_END
1219 
1220 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1221   int result;
1222   if (GetVMFlag <int> (thread, env, name, &result, &JVMFlag::intAt)) {
1223     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1224     return longBox(thread, env, result);
1225   }
1226   return NULL;
1227 WB_END
1228 
1229 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1230   uint result;
1231   if (GetVMFlag <uint> (thread, env, name, &result, &JVMFlag::uintAt)) {
1232     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1233     return longBox(thread, env, result);
1234   }
1235   return NULL;
1236 WB_END
1237 
1238 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1239   intx result;
1240   if (GetVMFlag <intx> (thread, env, name, &result, &JVMFlag::intxAt)) {
1241     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1242     return longBox(thread, env, result);
1243   }
1244   return NULL;
1245 WB_END
1246 
1247 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1248   uintx result;
1249   if (GetVMFlag <uintx> (thread, env, name, &result, &JVMFlag::uintxAt)) {
1250     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1251     return longBox(thread, env, result);
1252   }
1253   return NULL;
1254 WB_END
1255 
1256 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1257   uint64_t result;
1258   if (GetVMFlag <uint64_t> (thread, env, name, &result, &JVMFlag::uint64_tAt)) {
1259     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1260     return longBox(thread, env, result);
1261   }
1262   return NULL;
1263 WB_END
1264 
1265 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1266   size_t result;
1267   if (GetVMFlag <size_t> (thread, env, name, &result, &JVMFlag::size_tAt)) {
1268     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1269     return longBox(thread, env, result);
1270   }
1271   return NULL;
1272 WB_END
1273 
1274 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1275   double result;
1276   if (GetVMFlag <double> (thread, env, name, &result, &JVMFlag::doubleAt)) {
1277     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1278     return doubleBox(thread, env, result);
1279   }
1280   return NULL;
1281 WB_END
1282 
1283 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1284   ccstr ccstrResult;
1285   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &JVMFlag::ccstrAt)) {
1286     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1287     jstring result = env->NewStringUTF(ccstrResult);
1288     CHECK_JNI_EXCEPTION_(env, NULL);
1289     return result;
1290   }
1291   return NULL;
1292 WB_END
1293 
1294 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1295   bool result = value == JNI_TRUE ? true : false;
1296   SetVMFlag <bool> (thread, env, name, &result, &JVMFlag::boolAtPut);
1297 WB_END
1298 
1299 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1300   int result = value;
1301   SetVMFlag <int> (thread, env, name, &result, &JVMFlag::intAtPut);
1302 WB_END
1303 
1304 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1305   uint result = value;
1306   SetVMFlag <uint> (thread, env, name, &result, &JVMFlag::uintAtPut);
1307 WB_END
1308 
1309 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1310   intx result = value;
1311   SetVMFlag <intx> (thread, env, name, &result, &JVMFlag::intxAtPut);
1312 WB_END
1313 
1314 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1315   uintx result = value;
1316   SetVMFlag <uintx> (thread, env, name, &result, &JVMFlag::uintxAtPut);
1317 WB_END
1318 
1319 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1320   uint64_t result = value;
1321   SetVMFlag <uint64_t> (thread, env, name, &result, &JVMFlag::uint64_tAtPut);
1322 WB_END
1323 
1324 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1325   size_t result = value;
1326   SetVMFlag <size_t> (thread, env, name, &result, &JVMFlag::size_tAtPut);
1327 WB_END
1328 
1329 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1330   double result = value;
1331   SetVMFlag <double> (thread, env, name, &result, &JVMFlag::doubleAtPut);
1332 WB_END
1333 
1334 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1335   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
1336   const char* ccstrValue;
1337   if (value == NULL) {
1338     ccstrValue = NULL;
1339   }
1340   else {
1341     ccstrValue = env->GetStringUTFChars(value, NULL);
1342     CHECK_JNI_EXCEPTION(env);
1343   }
1344   ccstr ccstrResult = ccstrValue;
1345   bool needFree;
1346   {
1347     ThreadInVMfromNative ttvfn(thread); // back to VM
1348     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &JVMFlag::ccstrAtPut);
1349   }
1350   if (value != NULL) {
1351     env->ReleaseStringUTFChars(value, ccstrValue);
1352   }
1353   if (needFree) {
1354     FREE_C_HEAP_ARRAY(char, ccstrResult);
1355   }
1356 WB_END
1357 
1358 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1359   WhiteBox::compilation_locked = true;
1360 WB_END
1361 
1362 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1363   MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1364   WhiteBox::compilation_locked = false;
1365   mo.notify_all();
1366 WB_END
1367 
1368 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
1369   // Force a code cache sweep and block until it finished
1370   NMethodSweeper::force_sweep();
1371 WB_END
1372 
1373 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1374   ResourceMark rm(THREAD);
1375   int len;
1376   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1377   return (StringTable::lookup(name, len) != NULL);
1378 WB_END
1379 
1380 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1381   Universe::heap()->soft_ref_policy()->set_should_clear_all_soft_refs(true);
1382   Universe::heap()->collect(GCCause::_wb_full_gc);
1383 #if INCLUDE_G1GC
1384   if (UseG1GC) {
1385     // Needs to be cleared explicitly for G1
1386     Universe::heap()->soft_ref_policy()->set_should_clear_all_soft_refs(false);
1387   }
1388 #endif // INCLUDE_G1GC
1389 WB_END
1390 
1391 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1392   Universe::heap()->collect(GCCause::_wb_young_gc);
1393 WB_END
1394 
1395 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1396   // static+volatile in order to force the read to happen
1397   // (not be eliminated by the compiler)
1398   static char c;
1399   static volatile char* p;
1400 
1401   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1402   if (p == NULL) {
1403     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1404   }
1405 
1406   c = *p;
1407 WB_END
1408 
1409 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1410   const char* features = VM_Version::features_string();
1411   ThreadToNativeFromVM ttn(thread);
1412   jstring features_string = env->NewStringUTF(features);
1413 
1414   CHECK_JNI_EXCEPTION_(env, NULL);
1415 
1416   return features_string;
1417 WB_END
1418 
1419 int WhiteBox::get_blob_type(const CodeBlob* code) {
1420   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1421   if (code->is_aot()) {
1422     return -1;
1423   }
1424   return CodeCache::get_code_heap(code)->code_blob_type();
1425 }
1426 
1427 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1428   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1429   return CodeCache::get_code_heap(blob_type);
1430 }
1431 
1432 struct CodeBlobStub {
1433   CodeBlobStub(const CodeBlob* blob) :
1434       name(os::strdup(blob->name())),
1435       size(blob->size()),
1436       blob_type(WhiteBox::get_blob_type(blob)),
1437       address((jlong) blob) { }
1438   ~CodeBlobStub() { os::free((void*) name); }
1439   const char* const name;
1440   const jint        size;
1441   const jint        blob_type;
1442   const jlong       address;
1443 };
1444 
1445 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1446   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1447   CHECK_JNI_EXCEPTION_(env, NULL);
1448   jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1449 
1450   jstring name = env->NewStringUTF(cb->name);
1451   CHECK_JNI_EXCEPTION_(env, NULL);
1452   env->SetObjectArrayElement(result, 0, name);
1453 
1454   jobject obj = integerBox(thread, env, cb->size);
1455   CHECK_JNI_EXCEPTION_(env, NULL);
1456   env->SetObjectArrayElement(result, 1, obj);
1457 
1458   obj = integerBox(thread, env, cb->blob_type);
1459   CHECK_JNI_EXCEPTION_(env, NULL);
1460   env->SetObjectArrayElement(result, 2, obj);
1461 
1462   obj = longBox(thread, env, cb->address);
1463   CHECK_JNI_EXCEPTION_(env, NULL);
1464   env->SetObjectArrayElement(result, 3, obj);
1465 
1466   return result;
1467 }
1468 
1469 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1470   ResourceMark rm(THREAD);
1471   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1472   CHECK_JNI_EXCEPTION_(env, NULL);
1473   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1474   CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1475   jobjectArray result = NULL;
1476   if (code == NULL) {
1477     return result;
1478   }
1479   int comp_level = code->comp_level();
1480   int insts_size = comp_level == CompLevel_aot ? code->code_end() - code->code_begin() : code->insts_size();
1481 
1482   ThreadToNativeFromVM ttn(thread);
1483   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1484   CHECK_JNI_EXCEPTION_(env, NULL);
1485   result = env->NewObjectArray(5, clazz, NULL);
1486   if (result == NULL) {
1487     return result;
1488   }
1489 
1490   CodeBlobStub stub(code);
1491   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1492   CHECK_JNI_EXCEPTION_(env, NULL);
1493   env->SetObjectArrayElement(result, 0, codeBlob);
1494 
1495   jobject level = integerBox(thread, env, comp_level);
1496   CHECK_JNI_EXCEPTION_(env, NULL);
1497   env->SetObjectArrayElement(result, 1, level);
1498 
1499   jbyteArray insts = env->NewByteArray(insts_size);
1500   CHECK_JNI_EXCEPTION_(env, NULL);
1501   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1502   env->SetObjectArrayElement(result, 2, insts);
1503 
1504   jobject id = integerBox(thread, env, code->compile_id());
1505   CHECK_JNI_EXCEPTION_(env, NULL);
1506   env->SetObjectArrayElement(result, 3, id);
1507 
1508   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1509   CHECK_JNI_EXCEPTION_(env, NULL);
1510   env->SetObjectArrayElement(result, 4, entry_point);
1511 
1512   return result;
1513 WB_END
1514 
1515 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1516   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1517   BufferBlob* blob;
1518   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1519   if (full_size < size) {
1520     full_size += align_up(size - full_size, oopSize);
1521   }
1522   {
1523     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1524     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1525     if (blob != NULL) {
1526       ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1527     }
1528   }
1529   // Track memory usage statistic after releasing CodeCache_lock
1530   MemoryService::track_code_cache_memory_usage();
1531   return blob;
1532 }
1533 
1534 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1535   if (size < 0) {
1536     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1537       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1538   }
1539   return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1540 WB_END
1541 
1542 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1543   if (addr == 0) {
1544     return;
1545   }
1546   BufferBlob::free((BufferBlob*) addr);
1547 WB_END
1548 
1549 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1550   ResourceMark rm;
1551   GrowableArray<CodeBlobStub*> blobs;
1552   {
1553     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1554     CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1555     if (heap == NULL) {
1556       return NULL;
1557     }
1558     for (CodeBlob* cb = (CodeBlob*) heap->first();
1559          cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1560       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1561       new (stub) CodeBlobStub(cb);
1562       blobs.append(stub);
1563     }
1564   }
1565   if (blobs.length() == 0) {
1566     return NULL;
1567   }
1568   ThreadToNativeFromVM ttn(thread);
1569   jobjectArray result = NULL;
1570   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1571   CHECK_JNI_EXCEPTION_(env, NULL);
1572   result = env->NewObjectArray(blobs.length(), clazz, NULL);
1573   CHECK_JNI_EXCEPTION_(env, NULL);
1574   if (result == NULL) {
1575     return result;
1576   }
1577   int i = 0;
1578   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1579        it != blobs.end(); ++it) {
1580     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1581     CHECK_JNI_EXCEPTION_(env, NULL);
1582     env->SetObjectArrayElement(result, i, obj);
1583     CHECK_JNI_EXCEPTION_(env, NULL);
1584     ++i;
1585   }
1586   return result;
1587 WB_END
1588 
1589 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1590   return CompileBroker::get_compilation_activity_mode();
1591 WB_END
1592 
1593 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1594   if (addr == 0) {
1595     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1596       "WB_GetCodeBlob: addr is null");
1597   }
1598   ThreadToNativeFromVM ttn(thread);
1599   CodeBlobStub stub((CodeBlob*) addr);
1600   return codeBlob2objectArray(thread, env, &stub);
1601 WB_END
1602 
1603 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1604   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1605   CHECK_JNI_EXCEPTION_(env, 0);
1606   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1607   return (jlong) mh->method_data();
1608 WB_END
1609 
1610 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1611   return (jlong) Thread::current()->stack_size();
1612 WB_END
1613 
1614 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1615   JavaThread* t = JavaThread::current();
1616   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1617 WB_END
1618 
1619 
1620 int WhiteBox::array_bytes_to_length(size_t bytes) {
1621   return Array<u1>::bytes_to_length(bytes);
1622 }
1623 
1624 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1625   if (size < 0) {
1626     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1627         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1628   }
1629 
1630   oop class_loader_oop = JNIHandles::resolve(class_loader);
1631   ClassLoaderData* cld = class_loader_oop != NULL
1632       ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1633       : ClassLoaderData::the_null_class_loader_data();
1634 
1635   void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1636 
1637   return (jlong)(uintptr_t)metadata;
1638 WB_END
1639 
1640 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1641   oop class_loader_oop = JNIHandles::resolve(class_loader);
1642   ClassLoaderData* cld = class_loader_oop != NULL
1643       ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1644       : ClassLoaderData::the_null_class_loader_data();
1645 
1646   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1647 WB_END
1648 
1649 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1650                                 jstring version, jstring location, jobjectArray packages))
1651   ResourceMark rm(THREAD);
1652 
1653   objArrayOop packages_oop = objArrayOop(JNIHandles::resolve(packages));
1654   objArrayHandle packages_h(THREAD, packages_oop);
1655   int num_packages = (packages_h == NULL ? 0 : packages_h->length());
1656 
1657   char** pkgs = NULL;
1658   if (num_packages > 0) {
1659     pkgs = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char*, num_packages);
1660     for (int x = 0; x < num_packages; x++) {
1661       oop pkg_str = packages_h->obj_at(x);
1662       if (pkg_str == NULL || !pkg_str->is_a(SystemDictionary::String_klass())) {
1663         THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
1664                   err_msg("Bad package name"));
1665       }
1666       pkgs[x] = java_lang_String::as_utf8_string(pkg_str);
1667     }
1668   }
1669   Modules::define_module(module, is_open, version, location, (const char* const*)pkgs, num_packages, CHECK);
1670 WB_END
1671 
1672 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1673   ResourceMark rm(THREAD);
1674   char* package_name = NULL;
1675   if (package != NULL) {
1676       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1677   }
1678   Modules::add_module_exports_qualified(from_module, package_name, to_module, CHECK);
1679 WB_END
1680 
1681 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1682   ResourceMark rm(THREAD);
1683   char* package_name = NULL;
1684   if (package != NULL) {
1685       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1686   }
1687   Modules::add_module_exports_to_all_unnamed(module, package_name, CHECK);
1688 WB_END
1689 
1690 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1691   ResourceMark rm(THREAD);
1692   char* package_name = NULL;
1693   if (package != NULL) {
1694       package_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(package));
1695   }
1696   Modules::add_module_exports(module, package_name, NULL, CHECK);
1697 WB_END
1698 
1699 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1700   Modules::add_reads_module(from_module, source_module, CHECK);
1701 WB_END
1702 
1703 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1704   if (inc < 0) {
1705     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1706         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1707   }
1708 
1709   jlong max_size_t = (jlong) ((size_t) -1);
1710   if (inc > max_size_t) {
1711     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1712         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1713   }
1714 
1715   size_t new_cap_until_GC = 0;
1716   size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1717   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1718   if (!success) {
1719     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1720                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1721                 "due to contention with another thread");
1722   }
1723   return (jlong) new_cap_until_GC;
1724 WB_END
1725 
1726 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1727   return (jlong) MetaspaceGC::capacity_until_GC();
1728 WB_END
1729 
1730 WB_ENTRY(jboolean, WB_MetaspaceShouldConcurrentCollect(JNIEnv* env, jobject wb))
1731   return MetaspaceGC::should_concurrent_collect();
1732 WB_END
1733 
1734 WB_ENTRY(jlong, WB_MetaspaceReserveAlignment(JNIEnv* env, jobject wb))
1735   return (jlong)Metaspace::reserve_alignment();
1736 WB_END
1737 
1738 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1739   Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1740                                            Monitor::_safepoint_check_always :
1741                                            Monitor::_safepoint_check_never;
1742   MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1743                    attemptedNoSafepointValue == JNI_TRUE);
1744 WB_END
1745 
1746 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1747   oop obj_oop = JNIHandles::resolve(obj);
1748   return (jboolean) obj_oop->mark()->has_monitor();
1749 WB_END
1750 
1751 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1752   VM_ForceSafepoint force_safepoint_op;
1753   VMThread::execute(&force_safepoint_op);
1754 WB_END
1755 
1756 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1757   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1758   return (jlong) ik->constants();
1759 WB_END
1760 
1761 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1762   return ConstantPool::CPCACHE_INDEX_TAG;
1763 WB_END
1764 
1765 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1766   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1767   ConstantPool* cp = ik->constants();
1768   if (cp->cache() == NULL) {
1769       return -1;
1770   }
1771   return cp->cache()->length();
1772 WB_END
1773 
1774 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1775   InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1776   ConstantPool* cp = ik->constants();
1777   if (cp->cache() == NULL) {
1778     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1779   }
1780   jint cpci = index;
1781   jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1782   if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1783     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1784   }
1785   jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1786   return cpi;
1787 WB_END
1788 
1789 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1790   return ConstantPool::encode_invokedynamic_index(index);
1791 WB_END
1792 
1793 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1794   VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1795   VMThread::execute(&clear_ics);
1796 WB_END
1797 
1798 template <typename T>
1799 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1800   assert(value != NULL, "sanity");
1801   if (method == NULL || name == NULL) {
1802     return false;
1803   }
1804   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1805   CHECK_JNI_EXCEPTION_(env, false);
1806   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1807   // can't be in VM when we call JNI
1808   ThreadToNativeFromVM ttnfv(thread);
1809   const char* flag_name = env->GetStringUTFChars(name, NULL);
1810   CHECK_JNI_EXCEPTION_(env, false);
1811   bool result =  CompilerOracle::has_option_value(mh, flag_name, *value);
1812   env->ReleaseStringUTFChars(name, flag_name);
1813   return result;
1814 }
1815 
1816 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1817   bool result;
1818   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1819     // can't be in VM when we call JNI
1820     ThreadToNativeFromVM ttnfv(thread);
1821     return booleanBox(thread, env, result);
1822   }
1823   return NULL;
1824 WB_END
1825 
1826 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1827   intx result;
1828   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1829     // can't be in VM when we call JNI
1830     ThreadToNativeFromVM ttnfv(thread);
1831     return longBox(thread, env, result);
1832   }
1833   return NULL;
1834 WB_END
1835 
1836 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1837   uintx result;
1838   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1839     // can't be in VM when we call JNI
1840     ThreadToNativeFromVM ttnfv(thread);
1841     return longBox(thread, env, result);
1842   }
1843   return NULL;
1844 WB_END
1845 
1846 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1847   double result;
1848   if (GetMethodOption <double> (thread, env, method, name, &result)) {
1849     // can't be in VM when we call JNI
1850     ThreadToNativeFromVM ttnfv(thread);
1851     return doubleBox(thread, env, result);
1852   }
1853   return NULL;
1854 WB_END
1855 
1856 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1857   ccstr ccstrResult;
1858   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1859     // can't be in VM when we call JNI
1860     ThreadToNativeFromVM ttnfv(thread);
1861     jstring result = env->NewStringUTF(ccstrResult);
1862     CHECK_JNI_EXCEPTION_(env, NULL);
1863     return result;
1864   }
1865   return NULL;
1866 WB_END
1867 
1868 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
1869   const char* p = Arguments::get_default_shared_archive_path();
1870   ThreadToNativeFromVM ttn(thread);
1871   jstring path_string = env->NewStringUTF(p);
1872 
1873   CHECK_JNI_EXCEPTION_(env, NULL);
1874 
1875   return path_string;
1876 WB_END
1877 
1878 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
1879   return UseSharedSpaces;
1880 WB_END
1881 
1882 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1883   oop obj_oop = JNIHandles::resolve(obj);
1884   return HeapShared::is_archived_object(obj_oop);
1885 WB_END
1886 
1887 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1888   return (jboolean)MetaspaceShared::is_in_shared_metaspace(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1889 WB_END
1890 
1891 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1892   return !HeapShared::closed_archive_heap_region_mapped();
1893 WB_END
1894 
1895 WB_ENTRY(jobject, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass clazz))
1896   Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
1897   if (k->is_instance_klass()) {
1898     InstanceKlass *ik = InstanceKlass::cast(k);
1899     ConstantPool *cp = ik->constants();
1900     objArrayOop refs =  cp->resolved_references();
1901     return (jobject)JNIHandles::make_local(env, refs);
1902   } else {
1903     return NULL;
1904   }
1905 WB_END
1906 
1907 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
1908   return HeapShared::open_archive_heap_region_mapped();
1909 WB_END
1910 
1911 WB_ENTRY(jboolean, WB_IsCDSIncludedInVmBuild(JNIEnv* env))
1912 #if INCLUDE_CDS
1913 # ifdef _LP64
1914     if (!UseCompressedOops || !UseCompressedClassPointers) {
1915       // On 64-bit VMs, CDS is supported only with compressed oops/pointers
1916       return false;
1917     }
1918 # endif // _LP64
1919   return true;
1920 #else
1921   return false;
1922 #endif // INCLUDE_CDS
1923 WB_END
1924 
1925 WB_ENTRY(jboolean, WB_IsJavaHeapArchiveSupported(JNIEnv* env))
1926   return HeapShared::is_heap_object_archiving_allowed();
1927 WB_END
1928 
1929 
1930 WB_ENTRY(jboolean, WB_IsJFRIncludedInVmBuild(JNIEnv* env))
1931 #if INCLUDE_JFR
1932   return true;
1933 #else
1934   return false;
1935 #endif // INCLUDE_JFR
1936 WB_END
1937 
1938 #if INCLUDE_CDS
1939 
1940 WB_ENTRY(jint, WB_GetOffsetForName(JNIEnv* env, jobject o, jstring name))
1941   ResourceMark rm;
1942   char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
1943   int result = CDSOffsets::find_offset(c_name);
1944   return (jint)result;
1945 WB_END
1946 
1947 #endif // INCLUDE_CDS
1948 
1949 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
1950   class TraceSelfClosure : public ThreadClosure {
1951     jint _num_threads_completed;
1952 
1953     void do_thread(Thread* th) {
1954       assert(th->is_Java_thread(), "sanity");
1955       JavaThread* jt = (JavaThread*)th;
1956       ResourceMark rm;
1957 
1958       jt->print_on(tty);
1959       jt->print_stack_on(tty);
1960       tty->cr();
1961       Atomic::inc(&_num_threads_completed);
1962     }
1963 
1964   public:
1965     TraceSelfClosure() : _num_threads_completed(0) {}
1966 
1967     jint num_threads_completed() const { return _num_threads_completed; }
1968   };
1969   TraceSelfClosure tsc;
1970 
1971   if (all_threads) {
1972     Handshake::execute(&tsc);
1973   } else {
1974     oop thread_oop = JNIHandles::resolve(thread_handle);
1975     if (thread_oop != NULL) {
1976       JavaThread* target = java_lang_Thread::thread(thread_oop);
1977       Handshake::execute(&tsc, target);
1978     }
1979   }
1980   return tsc.num_threads_completed();
1981 WB_END
1982 
1983 //Some convenience methods to deal with objects from java
1984 int WhiteBox::offset_for_field(const char* field_name, oop object,
1985     Symbol* signature_symbol) {
1986   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1987   Thread* THREAD = Thread::current();
1988 
1989   //Get the class of our object
1990   Klass* arg_klass = object->klass();
1991   //Turn it into an instance-klass
1992   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1993 
1994   //Create symbols to look for in the class
1995   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1996       THREAD);
1997 
1998   //To be filled in with an offset of the field we're looking for
1999   fieldDescriptor fd;
2000 
2001   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2002   if (res == NULL) {
2003     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2004         name_symbol->as_C_string());
2005     vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2006   }
2007 
2008   //fetch the field at the offset we've found
2009   int dest_offset = fd.offset();
2010 
2011   return dest_offset;
2012 }
2013 
2014 
2015 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2016   int offset = offset_for_field(field_name, object,
2017       vmSymbols::string_signature());
2018   oop string = object->obj_field(offset);
2019   if (string == NULL) {
2020     return NULL;
2021   }
2022   const char* ret = java_lang_String::as_utf8_string(string);
2023   return ret;
2024 }
2025 
2026 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2027   int offset =
2028       offset_for_field(field_name, object, vmSymbols::bool_signature());
2029   bool ret = (object->bool_field(offset) == JNI_TRUE);
2030   return ret;
2031 }
2032 
2033 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2034   ResourceMark rm;
2035   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2036 
2037   //  one by one registration natives for exception catching
2038   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2039   CHECK_JNI_EXCEPTION(env);
2040   for (int i = 0, n = method_count; i < n; ++i) {
2041     // Skip dummy entries
2042     if (method_array[i].fnPtr == NULL) continue;
2043     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2044       jthrowable throwable_obj = env->ExceptionOccurred();
2045       if (throwable_obj != NULL) {
2046         env->ExceptionClear();
2047         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2048           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2049           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2050           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
2051               method_array[i].name, method_array[i].signature);
2052         }
2053       } else {
2054         // Registration failed unexpectedly.
2055         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
2056             method_array[i].name, method_array[i].signature);
2057         env->UnregisterNatives(wbclass);
2058         break;
2059       }
2060     }
2061   }
2062 }
2063 
2064 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2065   // can't be in VM when we call JNI
2066   ThreadToNativeFromVM ttnfv(thread);
2067   const char* dir = env->GetStringUTFChars(compDirect, NULL);
2068   CHECK_JNI_EXCEPTION_(env, 0);
2069   int ret;
2070   {
2071     ThreadInVMfromNative ttvfn(thread); // back to VM
2072     ret = DirectivesParser::parse_string(dir, tty);
2073   }
2074   env->ReleaseStringUTFChars(compDirect, dir);
2075   // -1 for error parsing directive. Return 0 as number of directives added.
2076   if (ret == -1) {
2077     ret = 0;
2078   }
2079   return (jint) ret;
2080 WB_END
2081 
2082 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2083   DirectivesStack::pop(count);
2084 WB_END
2085 
2086 // Checks that the library libfile has the noexecstack bit set.
2087 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2088   jboolean ret = false;
2089 #ifdef LINUX
2090   // Can't be in VM when we call JNI.
2091   ThreadToNativeFromVM ttnfv(thread);
2092   const char* lf = env->GetStringUTFChars(libfile, NULL);
2093   CHECK_JNI_EXCEPTION_(env, 0);
2094   ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2095   env->ReleaseStringUTFChars(libfile, lf);
2096 #endif
2097   return ret;
2098 WB_END
2099 
2100 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2101   LINUX_ONLY(return OSContainer::is_containerized();)
2102   return false;
2103 WB_END
2104 
2105 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2106   os::print_os_info(tty);
2107 WB_END
2108 
2109 // Elf decoder
2110 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2111 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2112   ElfFile::_do_not_cache_elf_section = true;
2113 #endif
2114 WB_END
2115 
2116 WB_ENTRY(jint, WB_ResolvedMethodRemovedCount(JNIEnv* env, jobject o))
2117   return (jint) ResolvedMethodTable::removed_entries_count();
2118 WB_END
2119 
2120 WB_ENTRY(jint, WB_ProtectionDomainRemovedCount(JNIEnv* env, jobject o))
2121   return (jint) SystemDictionary::pd_cache_table()->removed_entries_count();
2122 WB_END
2123 
2124 WB_ENTRY(jint, WB_AotLibrariesCount(JNIEnv* env, jobject o))
2125   jint result = 0;
2126 #if INCLUDE_AOT
2127   result = (jint) AOTLoader::libraries_count();
2128 #endif
2129   return result;
2130 WB_END
2131 
2132 #define CC (char*)
2133 
2134 static JNINativeMethod methods[] = {
2135   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
2136   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
2137   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
2138   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
2139   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
2140   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
2141   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
2142   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
2143   {CC"getHeapAlignment",                 CC"()J",                   (void*)&WB_GetHeapAlignment},
2144   {CC"isClassAlive0",                    CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
2145   {CC"getSymbolRefcount",                CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2146   {CC"parseCommandLine0",
2147       CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2148       (void*) &WB_ParseCommandLine
2149   },
2150   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2151                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
2152   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
2153                                                       (void*)&WB_AddToSystemClassLoaderSearch},
2154   {CC"getCompressedOopsMaxHeapSize", CC"()J",
2155       (void*)&WB_GetCompressedOopsMaxHeapSize},
2156   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
2157   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
2158   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
2159   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
2160 #if INCLUDE_CDS
2161   {CC"getOffsetForName0", CC"(Ljava/lang/String;)I",  (void*)&WB_GetOffsetForName},
2162 #endif
2163 #if INCLUDE_G1GC
2164   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
2165   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
2166   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
2167   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
2168   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
2169   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
2170   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
2171   {CC"g1StartConcMarkCycle",       CC"()Z",           (void*)&WB_G1StartMarkCycle  },
2172   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2173                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
2174   {CC"g1GetMixedGCInfo",   CC"(I)[J",                 (void*)&WB_G1GetMixedGCInfo },
2175 #endif // INCLUDE_G1GC
2176 #if INCLUDE_G1GC || INCLUDE_PARALLELGC
2177   {CC"dramReservedStart",   CC"()J",                  (void*)&WB_DramReservedStart },
2178   {CC"dramReservedEnd",     CC"()J",                  (void*)&WB_DramReservedEnd },
2179   {CC"nvdimmReservedStart", CC"()J",                  (void*)&WB_NvdimmReservedStart },
2180   {CC"nvdimmReservedEnd",   CC"()J",                  (void*)&WB_NvdimmReservedEnd },
2181 #endif // INCLUDE_G1GC || INCLUDE_PARALLELGC
2182 #if INCLUDE_PARALLELGC
2183   {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
2184   {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
2185 #endif
2186 #if INCLUDE_NMT
2187   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
2188   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
2189   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
2190   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
2191   {CC"NMTAttemptReserveMemoryAt",    CC"(JJ)J",       (void*)&WB_NMTAttemptReserveMemoryAt },
2192   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
2193   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
2194   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
2195   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
2196   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
2197 #endif // INCLUDE_NMT
2198   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
2199   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
2200   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
2201                                                       (void*)&WB_DeoptimizeMethod  },
2202   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
2203                                                       (void*)&WB_IsMethodCompiled  },
2204   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
2205                                                       (void*)&WB_IsMethodCompilable},
2206   {CC"isMethodQueuedForCompilation0",
2207       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
2208   {CC"isIntrinsicAvailable0",
2209       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
2210                                                       (void*)&WB_IsIntrinsicAvailable},
2211   {CC"makeMethodNotCompilable0",
2212       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
2213   {CC"testSetDontInlineMethod0",
2214       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
2215   {CC"getMethodCompilationLevel0",
2216       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
2217   {CC"getMethodEntryBci0",
2218       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
2219   {CC"getCompileQueueSize",
2220       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
2221   {CC"testSetForceInlineMethod0",
2222       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
2223   {CC"enqueueMethodForCompilation0",
2224       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
2225   {CC"enqueueInitializerForCompilation0",
2226       CC"(Ljava/lang/Class;I)Z",                      (void*)&WB_EnqueueInitializerForCompilation},
2227   {CC"clearMethodState0",
2228       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
2229   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
2230   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
2231   {CC"matchesMethod",
2232       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2233                                                       (void*)&WB_MatchesMethod},
2234   {CC"matchesInline",
2235       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2236                                                       (void*)&WB_MatchesInline},
2237   {CC"shouldPrintAssembly",
2238         CC"(Ljava/lang/reflect/Executable;I)Z",
2239                                                         (void*)&WB_ShouldPrintAssembly},
2240 
2241   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
2242   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
2243   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
2244   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
2245   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
2246   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
2247   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
2248   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
2249   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
2250   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
2251   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
2252                                                       (void*)&WB_SetStringVMFlag},
2253   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
2254                                                       (void*)&WB_GetBooleanVMFlag},
2255   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
2256                                                       (void*)&WB_GetIntVMFlag},
2257   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
2258                                                       (void*)&WB_GetUintVMFlag},
2259   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
2260                                                       (void*)&WB_GetIntxVMFlag},
2261   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
2262                                                       (void*)&WB_GetUintxVMFlag},
2263   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
2264                                                       (void*)&WB_GetUint64VMFlag},
2265   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
2266                                                       (void*)&WB_GetSizeTVMFlag},
2267   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
2268                                                       (void*)&WB_GetDoubleVMFlag},
2269   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
2270                                                       (void*)&WB_GetStringVMFlag},
2271   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
2272   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
2273   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
2274   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
2275   {CC"allocateMetaspace",
2276      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
2277   {CC"freeMetaspace",
2278      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
2279   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
2280   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
2281   {CC"metaspaceShouldConcurrentCollect", CC"()Z",     (void*)&WB_MetaspaceShouldConcurrentCollect },
2282   {CC"metaspaceReserveAlignment", CC"()J",            (void*)&WB_MetaspaceReserveAlignment },
2283   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
2284   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
2285                                                       (void*)&WB_GetNMethod         },
2286   {CC"forceNMethodSweep",  CC"()V",                   (void*)&WB_ForceNMethodSweep  },
2287   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
2288   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
2289   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
2290   {CC"getCompilationActivityMode",
2291                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
2292   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
2293                                                       (void*)&WB_GetMethodData      },
2294   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
2295   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
2296   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
2297   {CC"DefineModule",       CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
2298                                                       (void*)&WB_DefineModule },
2299   {CC"AddModuleExports",   CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
2300                                                       (void*)&WB_AddModuleExports },
2301   {CC"AddReadsModule",     CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
2302                                                       (void*)&WB_AddReadsModule },
2303   {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2304                                                       (void*)&WB_AddModuleExportsToAllUnnamed },
2305   {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2306                                                       (void*)&WB_AddModuleExportsToAll },
2307   {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
2308   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
2309   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
2310   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
2311   {CC"getConstantPoolCacheIndexTag0", CC"()I",  (void*)&WB_GetConstantPoolCacheIndexTag},
2312   {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I",  (void*)&WB_GetConstantPoolCacheLength},
2313   {CC"remapInstructionOperandFromCPCache0",
2314       CC"(Ljava/lang/Class;I)I",                      (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
2315   {CC"encodeConstantPoolIndyIndex0",
2316       CC"(I)I",                      (void*)&WB_ConstantPoolEncodeIndyIndex},
2317   {CC"getMethodBooleanOption",
2318       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
2319                                                       (void*)&WB_GetMethodBooleaneOption},
2320   {CC"getMethodIntxOption",
2321       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2322                                                       (void*)&WB_GetMethodIntxOption},
2323   {CC"getMethodUintxOption",
2324       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2325                                                       (void*)&WB_GetMethodUintxOption},
2326   {CC"getMethodDoubleOption",
2327       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
2328                                                       (void*)&WB_GetMethodDoubleOption},
2329   {CC"getMethodStringOption",
2330       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
2331                                                       (void*)&WB_GetMethodStringOption},
2332   {CC"getDefaultArchivePath",             CC"()Ljava/lang/String;",
2333                                                       (void*)&WB_GetDefaultArchivePath},
2334   {CC"isSharingEnabled",   CC"()Z",                   (void*)&WB_IsSharingEnabled},
2335   {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
2336   {CC"isSharedClass",      CC"(Ljava/lang/Class;)Z",  (void*)&WB_IsSharedClass },
2337   {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
2338   {CC"getResolvedReferences", CC"(Ljava/lang/Class;)Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
2339   {CC"areOpenArchiveHeapObjectsMapped",   CC"()Z",    (void*)&WB_AreOpenArchiveHeapObjectsMapped},
2340   {CC"isCDSIncludedInVmBuild",            CC"()Z",    (void*)&WB_IsCDSIncludedInVmBuild },
2341   {CC"isJFRIncludedInVmBuild",            CC"()Z",    (void*)&WB_IsJFRIncludedInVmBuild },
2342   {CC"isJavaHeapArchiveSupported",      CC"()Z",      (void*)&WB_IsJavaHeapArchiveSupported },
2343 
2344   {CC"clearInlineCaches0",  CC"(Z)V",                 (void*)&WB_ClearInlineCaches },
2345   {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
2346   {CC"addCompilerDirective",    CC"(Ljava/lang/String;)I",
2347                                                       (void*)&WB_AddCompilerDirective },
2348   {CC"removeCompilerDirective",   CC"(I)V",           (void*)&WB_RemoveCompilerDirective },
2349   {CC"isGCSupported",             CC"(I)Z",           (void*)&WB_IsGCSupported},
2350   {CC"isGCSelected",              CC"(I)Z",           (void*)&WB_IsGCSelected},
2351   {CC"isGCSelectedErgonomically", CC"()Z",            (void*)&WB_IsGCSelectedErgonomically},
2352   {CC"supportsConcurrentGCPhaseControl", CC"()Z",     (void*)&WB_SupportsConcurrentGCPhaseControl},
2353   {CC"getConcurrentGCPhases",     CC"()[Ljava/lang/String;",
2354                                                       (void*)&WB_GetConcurrentGCPhases},
2355   {CC"requestConcurrentGCPhase0", CC"(Ljava/lang/String;)Z",
2356                                                       (void*)&WB_RequestConcurrentGCPhase},
2357   {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
2358                                                       (void*)&WB_CheckLibSpecifiesNoexecstack},
2359   {CC"isContainerized",           CC"()Z",            (void*)&WB_IsContainerized },
2360   {CC"printOsInfo",               CC"()V",            (void*)&WB_PrintOsInfo },
2361   {CC"disableElfSectionCache",    CC"()V",            (void*)&WB_DisableElfSectionCache },
2362   {CC"resolvedMethodRemovedCount",     CC"()I",       (void*)&WB_ResolvedMethodRemovedCount },
2363   {CC"protectionDomainRemovedCount",   CC"()I",       (void*)&WB_ProtectionDomainRemovedCount },
2364   {CC"aotLibrariesCount", CC"()I",                    (void*)&WB_AotLibrariesCount },
2365 };
2366 
2367 
2368 #undef CC
2369 
2370 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
2371   {
2372     if (WhiteBoxAPI) {
2373       // Make sure that wbclass is loaded by the null classloader
2374       InstanceKlass* ik = InstanceKlass::cast(JNIHandles::resolve(wbclass)->klass());
2375       Handle loader(THREAD, ik->class_loader());
2376       if (loader.is_null()) {
2377         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
2378         WhiteBox::set_used();
2379       }
2380     }
2381   }
2382 JVM_END