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