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