1 /*
   2  * Copyright (c) 2012, 2014, 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 "memory/metadataFactory.hpp"
  28 #include "memory/universe.hpp"
  29 #include "oops/oop.inline.hpp"
  30 
  31 #include "classfile/symbolTable.hpp"
  32 #include "classfile/classLoaderData.hpp"
  33 
  34 #include "prims/whitebox.hpp"
  35 #include "prims/wbtestmethods/parserTests.hpp"
  36 
  37 #include "runtime/arguments.hpp"
  38 #include "runtime/interfaceSupport.hpp"
  39 #include "runtime/os.hpp"
  40 #include "utilities/array.hpp"
  41 #include "utilities/debug.hpp"
  42 #include "utilities/macros.hpp"
  43 #include "utilities/exceptions.hpp"
  44 
  45 #if INCLUDE_ALL_GCS
  46 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
  47 #include "gc_implementation/g1/concurrentMark.hpp"
  48 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
  49 #include "gc_implementation/g1/heapRegionRemSet.hpp"
  50 #endif // INCLUDE_ALL_GCS
  51 
  52 #if INCLUDE_NMT
  53 #include "services/mallocSiteTable.hpp"
  54 #include "services/memTracker.hpp"
  55 #include "utilities/nativeCallStack.hpp"
  56 #endif // INCLUDE_NMT
  57 
  58 #include "compiler/compileBroker.hpp"
  59 #include "jvmtifiles/jvmtiEnv.hpp"
  60 #include "runtime/compilationPolicy.hpp"
  61 
  62 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  63 
  64 #define SIZE_T_MAX_VALUE ((size_t) -1)
  65 
  66 bool WhiteBox::_used = false;
  67 
  68 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  69   return (jlong)(void*)JNIHandles::resolve(obj);
  70 WB_END
  71 
  72 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  73   return heapOopSize;
  74 WB_END
  75 
  76 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
  77   return os::vm_page_size();
  78 WB_END
  79 
  80 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
  81   return os::large_page_size();
  82 WB_END
  83 
  84 class WBIsKlassAliveClosure : public KlassClosure {
  85     Symbol* _name;
  86     bool _found;
  87 public:
  88     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
  89 
  90     void do_klass(Klass* k) {
  91       if (_found) return;
  92       Symbol* ksym = k->name();
  93       if (ksym->fast_compare(_name) == 0) {
  94         _found = true;
  95       }
  96     }
  97 
  98     bool found() const {
  99         return _found;
 100     }
 101 };
 102 
 103 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
 104   Handle h_name = JNIHandles::resolve(name);
 105   if (h_name.is_null()) return false;
 106   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
 107   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 108 
 109   WBIsKlassAliveClosure closure(sym);
 110   ClassLoaderDataGraph::classes_do(&closure);
 111 
 112   return closure.found();
 113 WB_END
 114 
 115 WB_ENTRY(jboolean, WB_ClassKnownToNotExist(JNIEnv* env, jobject o, jobject loader, jstring name))
 116   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 117   const char* class_name = env->GetStringUTFChars(name, NULL);
 118   jboolean result = JVM_KnownToNotExist(env, loader, class_name);
 119   env->ReleaseStringUTFChars(name, class_name);
 120   return result;
 121 WB_END
 122 
 123 WB_ENTRY(jobjectArray, WB_GetLookupCacheURLs(JNIEnv* env, jobject o, jobject loader))
 124   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 125   return JVM_GetResourceLookupCacheURLs(env, loader);
 126 WB_END
 127 
 128 WB_ENTRY(jintArray, WB_GetLookupCacheMatches(JNIEnv* env, jobject o, jobject loader, jstring name))
 129   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 130   const char* resource_name = env->GetStringUTFChars(name, NULL);
 131   jintArray result = JVM_GetResourceLookupCache(env, loader, resource_name);
 132 
 133   env->ReleaseStringUTFChars(name, resource_name);
 134   return result;
 135 WB_END
 136 
 137 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 138 #if INCLUDE_JVMTI
 139   ResourceMark rm;
 140   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 141   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 142   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 143   assert(err == JVMTI_ERROR_NONE, "must not fail");
 144 #endif
 145 }
 146 WB_END
 147 
 148 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 149 #if INCLUDE_JVMTI
 150   ResourceMark rm;
 151   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 152   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 153   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 154   assert(err == JVMTI_ERROR_NONE, "must not fail");
 155 #endif
 156 }
 157 WB_END
 158 
 159 
 160 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 161   return (jlong)Arguments::max_heap_for_compressed_oops();
 162 }
 163 WB_END
 164 
 165 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 166   CollectorPolicy * p = Universe::heap()->collector_policy();
 167   gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
 168     SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Min alignment "SIZE_FORMAT" Max alignment "SIZE_FORMAT,
 169     p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
 170     p->space_alignment(), p->heap_alignment());
 171 }
 172 WB_END
 173 
 174 #ifndef PRODUCT
 175 // Forward declaration
 176 void TestReservedSpace_test();
 177 void TestReserveMemorySpecial_test();
 178 void TestVirtualSpace_test();
 179 void TestMetaspaceAux_test();
 180 #endif
 181 
 182 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 183 #ifndef PRODUCT
 184   TestReservedSpace_test();
 185   TestReserveMemorySpecial_test();
 186   TestVirtualSpace_test();
 187   TestMetaspaceAux_test();
 188 #endif
 189 WB_END
 190 
 191 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 192   size_t granularity = os::vm_allocation_granularity();
 193   ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
 194   VirtualSpace vs;
 195   vs.initialize(rhs, 50 * granularity);
 196 
 197   //Check if constraints are complied
 198   if (!( UseCompressedOops && rhs.base() != NULL &&
 199          Universe::narrow_oop_base() != NULL &&
 200          Universe::narrow_oop_use_implicit_null_checks() )) {
 201     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 202                   "\tUseCompressedOops is %d\n"
 203                   "\trhs.base() is "PTR_FORMAT"\n"
 204                   "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
 205                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
 206                   UseCompressedOops,
 207                   rhs.base(),
 208                   Universe::narrow_oop_base(),
 209                   Universe::narrow_oop_use_implicit_null_checks());
 210     return;
 211   }
 212   tty->print_cr("Reading from no access area... ");
 213   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 214                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 215 WB_END
 216 
 217 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 218                                            size_t magnitude, size_t iterations) {
 219   size_t granularity = os::vm_allocation_granularity();
 220   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
 221   VirtualSpace vs;
 222   if (!vs.initialize(rhs, 0)) {
 223     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 224     return 3;
 225   }
 226 
 227   long seed = os::random();
 228   tty->print_cr("Random seed is %ld", seed);
 229   os::init_random(seed);
 230 
 231   for (size_t i = 0; i < iterations; i++) {
 232 
 233     // Whether we will shrink or grow
 234     bool shrink = os::random() % 2L == 0;
 235 
 236     // Get random delta to resize virtual space
 237     size_t delta = (size_t)os::random() % magnitude;
 238 
 239     // If we are about to shrink virtual space below zero, then expand instead
 240     if (shrink && vs.committed_size() < delta) {
 241       shrink = false;
 242     }
 243 
 244     // Resizing by delta
 245     if (shrink) {
 246       vs.shrink_by(delta);
 247     } else {
 248       // If expanding fails expand_by will silently return false
 249       vs.expand_by(delta, true);
 250     }
 251   }
 252   return 0;
 253 }
 254 
 255 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 256         jlong reserved_space_size, jlong magnitude, jlong iterations))
 257   tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
 258                 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
 259                 iterations);
 260   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 261     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 262     return 1;
 263   }
 264 
 265   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 266   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 267   if (sizeof(size_t) < sizeof(jlong)) {
 268     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 269     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 270         || iterations > size_t_max_value) {
 271       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 272       return 2;
 273     }
 274   }
 275 
 276   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 277                                         (size_t) magnitude, (size_t) iterations);
 278 WB_END
 279 
 280 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 281   oop p = JNIHandles::resolve(obj);
 282 #if INCLUDE_ALL_GCS
 283   if (UseG1GC) {
 284     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 285     const HeapRegion* hr = g1->heap_region_containing(p);
 286     if (hr == NULL) {
 287       return false;
 288     }
 289     return !(hr->is_young());
 290   } else if (UseParallelGC) {
 291     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 292     return !psh->is_in_young(p);
 293   }
 294 #endif // INCLUDE_ALL_GCS
 295   GenCollectedHeap* gch = GenCollectedHeap::heap();
 296   return !gch->is_in_young(p);
 297 WB_END
 298 
 299 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 300   oop p = JNIHandles::resolve(obj);
 301   return p->size() * HeapWordSize;
 302 WB_END
 303 
 304 #if INCLUDE_ALL_GCS
 305 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
 306   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 307   oop result = JNIHandles::resolve(obj);
 308   const HeapRegion* hr = g1->heap_region_containing(result);
 309   return hr->isHumongous();
 310 WB_END
 311 
 312 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 313   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 314   size_t nr = g1->num_free_regions();
 315   return (jlong)nr;
 316 WB_END
 317 
 318 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 319   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 320   ConcurrentMark* cm = g1->concurrent_mark();
 321   return cm->concurrent_marking_in_progress();
 322 WB_END
 323 
 324 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 325   return (jint)HeapRegion::GrainBytes;
 326 WB_END
 327 #endif // INCLUDE_ALL_GCS
 328 
 329 #if INCLUDE_NMT
 330 // Alloc memory using the test memory type so that we can use that to see if
 331 // NMT picks it up correctly
 332 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 333   jlong addr = 0;
 334   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 335   return addr;
 336 WB_END
 337 
 338 // Alloc memory with pseudo call stack. The test can create psudo malloc
 339 // allocation site to stress the malloc tracking.
 340 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 341   address pc = (address)(size_t)pseudo_stack;
 342   NativeCallStack stack(&pc, 1);
 343   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 344 WB_END
 345 
 346 // Free the memory allocated by NMTAllocTest
 347 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 348   os::free((void*)(uintptr_t)mem, mtTest);
 349 WB_END
 350 
 351 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 352   jlong addr = 0;
 353 
 354     addr = (jlong)(uintptr_t)os::reserve_memory(size);
 355     MemTracker::record_virtual_memory_type((address)addr, mtTest);
 356 
 357   return addr;
 358 WB_END
 359 
 360 
 361 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 362   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 363   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 364 WB_END
 365 
 366 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 367   os::uncommit_memory((char *)(uintptr_t)addr, size);
 368 WB_END
 369 
 370 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 371   os::release_memory((char *)(uintptr_t)addr, size);
 372 WB_END
 373 
 374 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
 375   return MemTracker::tracking_level() == NMT_detail;
 376 WB_END
 377 
 378 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 379   // Test that we can downgrade NMT levels but not upgrade them.
 380   if (MemTracker::tracking_level() == NMT_off) {
 381     MemTracker::transition_to(NMT_off);
 382     return MemTracker::tracking_level() == NMT_off;
 383   } else {
 384     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 385     MemTracker::transition_to(NMT_summary);
 386     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 387 
 388     // Can't go to detail once NMT is set to summary.
 389     MemTracker::transition_to(NMT_detail);
 390     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 391 
 392     // Shutdown sets tracking level to minimal.
 393     MemTracker::shutdown();
 394     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 395 
 396     // Once the tracking level is minimal, we cannot increase to summary.
 397     // The code ignores this request instead of asserting because if the malloc site
 398     // table overflows in another thread, it tries to change the code to summary.
 399     MemTracker::transition_to(NMT_summary);
 400     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 401 
 402     // Really can never go up to detail, verify that the code would never do this.
 403     MemTracker::transition_to(NMT_detail);
 404     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 405     return MemTracker::tracking_level() == NMT_minimal;
 406   }
 407 WB_END
 408 
 409 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 410   int hash_size = MallocSiteTable::hash_buckets();
 411   assert(hash_size > 0, "NMT hash_size should be > 0");
 412   return (jint)hash_size;
 413 WB_END
 414 #endif // INCLUDE_NMT
 415 
 416 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 417   assert(method != NULL, "method should not be null");
 418   ThreadToNativeFromVM ttn(thread);
 419   return env->FromReflectedMethod(method);
 420 }
 421 
 422 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 423   MutexLockerEx mu(Compile_lock);
 424   CodeCache::mark_all_nmethods_for_deoptimization();
 425   VM_Deoptimize op;
 426   VMThread::execute(&op);
 427 WB_END
 428 
 429 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 430   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 431   int result = 0;
 432   CHECK_JNI_EXCEPTION_(env, result);
 433   MutexLockerEx mu(Compile_lock);
 434   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 435   if (is_osr) {
 436     result += mh->mark_osr_nmethods();
 437   } else if (mh->code() != NULL) {
 438     mh->code()->mark_for_deoptimization();
 439     ++result;
 440   }
 441   result += CodeCache::mark_for_deoptimization(mh());
 442   if (result > 0) {
 443     VM_Deoptimize op;
 444     VMThread::execute(&op);
 445   }
 446   return result;
 447 WB_END
 448 
 449 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 450   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 451   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 452   MutexLockerEx mu(Compile_lock);
 453   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 454   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 455   if (code == NULL) {
 456     return JNI_FALSE;
 457   }
 458   return (code->is_alive() && !code->is_marked_for_deoptimization());
 459 WB_END
 460 
 461 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 462   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 463   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 464   MutexLockerEx mu(Compile_lock);
 465   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 466   if (is_osr) {
 467     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 468   } else {
 469     return CompilationPolicy::can_be_compiled(mh, comp_level);
 470   }
 471 WB_END
 472 
 473 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 474   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 475   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 476   MutexLockerEx mu(Compile_lock);
 477   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 478   return mh->queued_for_compilation();
 479 WB_END
 480 
 481 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 482   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 483   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 484   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 485   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 486   return (code != NULL ? code->comp_level() : CompLevel_none);
 487 WB_END
 488 
 489 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 490   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 491   CHECK_JNI_EXCEPTION(env);
 492   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 493   if (is_osr) {
 494     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 495   } else {
 496     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 497   }
 498 WB_END
 499 
 500 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 501   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 502   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 503   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 504   nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 505   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 506 WB_END
 507 
 508 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 509   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 510   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 511   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 512   bool result = mh->dont_inline();
 513   mh->set_dont_inline(value == JNI_TRUE);
 514   return result;
 515 WB_END
 516 
 517 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 518   if (comp_level == CompLevel_any) {
 519     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 520         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 521   } else {
 522     return CompileBroker::queue_size(comp_level);
 523   }
 524 WB_END
 525 
 526 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 527   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 528   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 529   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 530   bool result = mh->force_inline();
 531   mh->set_force_inline(value == JNI_TRUE);
 532   return result;
 533 WB_END
 534 
 535 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
 536   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 537   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 538   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 539   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
 540   MutexLockerEx mu(Compile_lock);
 541   return (mh->queued_for_compilation() || nm != NULL);
 542 WB_END
 543 
 544 class VM_WhiteBoxOperation : public VM_Operation {
 545  public:
 546   VM_WhiteBoxOperation()                         { }
 547   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
 548   bool allow_nested_vm_operations() const        { return true; }
 549 };
 550 
 551 class AlwaysFalseClosure : public BoolObjectClosure {
 552  public:
 553   bool do_object_b(oop p) { return false; }
 554 };
 555 
 556 static AlwaysFalseClosure always_false;
 557 
 558 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation {
 559  public:
 560   VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { }
 561   void doit() {
 562     _mdo->clean_method_data(&always_false);
 563   }
 564  private:
 565   MethodData* _mdo;
 566 };
 567 
 568 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
 569   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 570   CHECK_JNI_EXCEPTION(env);
 571   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 572   MutexLockerEx mu(Compile_lock);
 573   MethodData* mdo = mh->method_data();
 574   MethodCounters* mcs = mh->method_counters();
 575 
 576   if (mdo != NULL) {
 577     mdo->init();
 578     ResourceMark rm;
 579     int arg_count = mdo->method()->size_of_parameters();
 580     for (int i = 0; i < arg_count; i++) {
 581       mdo->set_arg_modified(i, 0);
 582     }
 583     VM_WhiteBoxCleanMethodData op(mdo);
 584     VMThread::execute(&op);
 585   }
 586 
 587   mh->clear_not_c1_compilable();
 588   mh->clear_not_c2_compilable();
 589   mh->clear_not_c2_osr_compilable();
 590   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
 591   if (mcs != NULL) {
 592     mcs->backedge_counter()->init();
 593     mcs->invocation_counter()->init();
 594     mcs->set_interpreter_invocation_count(0);
 595     mcs->set_interpreter_throwout_count(0);
 596 
 597 #ifdef TIERED
 598     mcs->set_rate(0.0F);
 599     mh->set_prev_event_count(0);
 600     mh->set_prev_time(0);
 601 #endif
 602   }
 603 WB_END
 604 
 605 template <typename T>
 606 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*)) {
 607   if (name == NULL) {
 608     return false;
 609   }
 610   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 611   const char* flag_name = env->GetStringUTFChars(name, NULL);
 612   bool result = (*TAt)(flag_name, value);
 613   env->ReleaseStringUTFChars(name, flag_name);
 614   return result;
 615 }
 616 
 617 template <typename T>
 618 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
 619   if (name == NULL) {
 620     return false;
 621   }
 622   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 623   const char* flag_name = env->GetStringUTFChars(name, NULL);
 624   bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
 625   env->ReleaseStringUTFChars(name, flag_name);
 626   return result;
 627 }
 628 
 629 template <typename T>
 630 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
 631   ResourceMark rm(thread);
 632   jclass clazz = env->FindClass(name->as_C_string());
 633   CHECK_JNI_EXCEPTION_(env, NULL);
 634   jmethodID methodID = env->GetStaticMethodID(clazz,
 635         vmSymbols::valueOf_name()->as_C_string(),
 636         sig->as_C_string());
 637   CHECK_JNI_EXCEPTION_(env, NULL);
 638   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
 639   CHECK_JNI_EXCEPTION_(env, NULL);
 640   return result;
 641 }
 642 
 643 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
 644   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
 645 }
 646 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
 647   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
 648 }
 649 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
 650   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
 651 }
 652 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
 653   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
 654 }*/
 655 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
 656   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
 657 }
 658 
 659 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
 660   bool result;
 661   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
 662     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 663     return booleanBox(thread, env, result);
 664   }
 665   return NULL;
 666 WB_END
 667 
 668 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
 669   intx result;
 670   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
 671     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 672     return longBox(thread, env, result);
 673   }
 674   return NULL;
 675 WB_END
 676 
 677 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
 678   uintx result;
 679   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
 680     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 681     return longBox(thread, env, result);
 682   }
 683   return NULL;
 684 WB_END
 685 
 686 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
 687   uint64_t result;
 688   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
 689     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 690     return longBox(thread, env, result);
 691   }
 692   return NULL;
 693 WB_END
 694 
 695 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
 696   double result;
 697   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
 698     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 699     return doubleBox(thread, env, result);
 700   }
 701   return NULL;
 702 WB_END
 703 
 704 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
 705   ccstr ccstrResult;
 706   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
 707     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 708     jstring result = env->NewStringUTF(ccstrResult);
 709     CHECK_JNI_EXCEPTION_(env, NULL);
 710     return result;
 711   }
 712   return NULL;
 713 WB_END
 714 
 715 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
 716   bool result = value == JNI_TRUE ? true : false;
 717   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
 718 WB_END
 719 
 720 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 721   intx result = value;
 722   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
 723 WB_END
 724 
 725 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 726   uintx result = value;
 727   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
 728 WB_END
 729 
 730 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 731   uint64_t result = value;
 732   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
 733 WB_END
 734 
 735 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
 736   double result = value;
 737   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
 738 WB_END
 739 
 740 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
 741   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 742   const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
 743   ccstr ccstrResult = ccstrValue;
 744   bool needFree;
 745   {
 746     ThreadInVMfromNative ttvfn(thread); // back to VM
 747     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
 748   }
 749   if (value != NULL) {
 750     env->ReleaseStringUTFChars(value, ccstrValue);
 751   }
 752   if (needFree) {
 753     FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
 754   }
 755 WB_END
 756 
 757 
 758 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
 759   ResourceMark rm(THREAD);
 760   int len;
 761   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
 762   return (StringTable::lookup(name, len) != NULL);
 763 WB_END
 764 
 765 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
 766   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
 767   Universe::heap()->collect(GCCause::_last_ditch_collection);
 768 #if INCLUDE_ALL_GCS
 769   if (UseG1GC) {
 770     // Needs to be cleared explicitly for G1
 771     Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
 772   }
 773 #endif // INCLUDE_ALL_GCS
 774 WB_END
 775 
 776 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
 777   Universe::heap()->collect(GCCause::_wb_young_gc);
 778 WB_END
 779 
 780 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
 781   // static+volatile in order to force the read to happen
 782   // (not be eliminated by the compiler)
 783   static char c;
 784   static volatile char* p;
 785 
 786   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
 787   if (p == NULL) {
 788     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
 789   }
 790 
 791   c = *p;
 792 WB_END
 793 
 794 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
 795   const char* cpu_features = VM_Version::cpu_features();
 796   ThreadToNativeFromVM ttn(thread);
 797   jstring features_string = env->NewStringUTF(cpu_features);
 798 
 799   CHECK_JNI_EXCEPTION_(env, NULL);
 800 
 801   return features_string;
 802 WB_END
 803 
 804 
 805 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 806   ResourceMark rm(THREAD);
 807   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 808   CHECK_JNI_EXCEPTION_(env, NULL);
 809   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 810   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 811   jobjectArray result = NULL;
 812   if (code == NULL) {
 813     return result;
 814   }
 815   int insts_size = code->insts_size();
 816 
 817   ThreadToNativeFromVM ttn(thread);
 818   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
 819   CHECK_JNI_EXCEPTION_(env, NULL);
 820   result = env->NewObjectArray(2, clazz, NULL);
 821   if (result == NULL) {
 822     return result;
 823   }
 824 
 825   jobject obj = integerBox(thread, env, code->comp_level());
 826   CHECK_JNI_EXCEPTION_(env, NULL);
 827   env->SetObjectArrayElement(result, 0, obj);
 828 
 829   jbyteArray insts = env->NewByteArray(insts_size);
 830   CHECK_JNI_EXCEPTION_(env, NULL);
 831   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
 832   env->SetObjectArrayElement(result, 1, insts);
 833 
 834   return result;
 835 WB_END
 836 
 837 
 838 int WhiteBox::array_bytes_to_length(size_t bytes) {
 839   return Array<u1>::bytes_to_length(bytes);
 840 }
 841 
 842 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
 843   if (size < 0) {
 844     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 845         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
 846   }
 847 
 848   oop class_loader_oop = JNIHandles::resolve(class_loader);
 849   ClassLoaderData* cld = class_loader_oop != NULL
 850       ? java_lang_ClassLoader::loader_data(class_loader_oop)
 851       : ClassLoaderData::the_null_class_loader_data();
 852 
 853   void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
 854 
 855   return (jlong)(uintptr_t)metadata;
 856 WB_END
 857 
 858 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
 859   oop class_loader_oop = JNIHandles::resolve(class_loader);
 860   ClassLoaderData* cld = class_loader_oop != NULL
 861       ? java_lang_ClassLoader::loader_data(class_loader_oop)
 862       : ClassLoaderData::the_null_class_loader_data();
 863 
 864   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
 865 WB_END
 866 
 867 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
 868   if (inc < 0) {
 869     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 870         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
 871   }
 872 
 873   jlong max_size_t = (jlong) ((size_t) -1);
 874   if (inc > max_size_t) {
 875     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
 876         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
 877   }
 878 
 879   size_t new_cap_until_GC = 0;
 880   size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
 881   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
 882   if (!success) {
 883     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
 884                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
 885                 "due to contention with another thread");
 886   }
 887   return (jlong) new_cap_until_GC;
 888 WB_END
 889 
 890 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
 891   return (jlong) MetaspaceGC::capacity_until_GC();
 892 WB_END
 893 
 894 //Some convenience methods to deal with objects from java
 895 int WhiteBox::offset_for_field(const char* field_name, oop object,
 896     Symbol* signature_symbol) {
 897   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
 898   Thread* THREAD = Thread::current();
 899 
 900   //Get the class of our object
 901   Klass* arg_klass = object->klass();
 902   //Turn it into an instance-klass
 903   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
 904 
 905   //Create symbols to look for in the class
 906   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
 907       THREAD);
 908 
 909   //To be filled in with an offset of the field we're looking for
 910   fieldDescriptor fd;
 911 
 912   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
 913   if (res == NULL) {
 914     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
 915         name_symbol->as_C_string());
 916     fatal("Invalid layout of preloaded class");
 917   }
 918 
 919   //fetch the field at the offset we've found
 920   int dest_offset = fd.offset();
 921 
 922   return dest_offset;
 923 }
 924 
 925 
 926 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
 927   int offset = offset_for_field(field_name, object,
 928       vmSymbols::string_signature());
 929   oop string = object->obj_field(offset);
 930   if (string == NULL) {
 931     return NULL;
 932   }
 933   const char* ret = java_lang_String::as_utf8_string(string);
 934   return ret;
 935 }
 936 
 937 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
 938   int offset =
 939       offset_for_field(field_name, object, vmSymbols::bool_signature());
 940   bool ret = (object->bool_field(offset) == JNI_TRUE);
 941   return ret;
 942 }
 943 
 944 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
 945   ResourceMark rm;
 946   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
 947 
 948   //  one by one registration natives for exception catching
 949   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
 950   CHECK_JNI_EXCEPTION(env);
 951   for (int i = 0, n = method_count; i < n; ++i) {
 952     // Skip dummy entries
 953     if (method_array[i].fnPtr == NULL) continue;
 954     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
 955       jthrowable throwable_obj = env->ExceptionOccurred();
 956       if (throwable_obj != NULL) {
 957         env->ExceptionClear();
 958         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
 959           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
 960           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
 961           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
 962               method_array[i].name, method_array[i].signature);
 963         }
 964       } else {
 965         // Registration failed unexpectedly.
 966         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
 967             method_array[i].name, method_array[i].signature);
 968         env->UnregisterNatives(wbclass);
 969         break;
 970       }
 971     }
 972   }
 973 }
 974 
 975 #define CC (char*)
 976 
 977 static JNINativeMethod methods[] = {
 978   {CC"getObjectAddress",   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
 979   {CC"getObjectSize",      CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
 980   {CC"isObjectInOldGen",   CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
 981   {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
 982   {CC"getVMPageSize",      CC"()I",                   (void*)&WB_GetVMPageSize     },
 983   {CC"getVMLargePageSize", CC"()J",                   (void*)&WB_GetVMLargePageSize},
 984   {CC"isClassAlive0",      CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
 985   {CC"classKnownToNotExist",
 986                            CC"(Ljava/lang/ClassLoader;Ljava/lang/String;)Z",(void*)&WB_ClassKnownToNotExist},
 987   {CC"getLookupCacheURLs", CC"(Ljava/lang/ClassLoader;)[Ljava/net/URL;",    (void*)&WB_GetLookupCacheURLs},
 988   {CC"getLookupCacheMatches", CC"(Ljava/lang/ClassLoader;Ljava/lang/String;)[I",
 989                                                       (void*)&WB_GetLookupCacheMatches},
 990   {CC"parseCommandLine",
 991       CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
 992       (void*) &WB_ParseCommandLine
 993   },
 994   {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V",
 995                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
 996   {CC"addToSystemClassLoaderSearch",    CC"(Ljava/lang/String;)V",
 997                                                       (void*)&WB_AddToSystemClassLoaderSearch},
 998   {CC"getCompressedOopsMaxHeapSize", CC"()J",
 999       (void*)&WB_GetCompressedOopsMaxHeapSize},
1000   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
1001   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
1002   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
1003   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
1004 #if INCLUDE_ALL_GCS
1005   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
1006   {CC"g1IsHumongous",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
1007   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
1008   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
1009 #endif // INCLUDE_ALL_GCS
1010 #if INCLUDE_NMT
1011   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
1012   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
1013   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
1014   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
1015   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
1016   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
1017   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
1018   {CC"NMTIsDetailSupported",CC"()Z",                  (void*)&WB_NMTIsDetailSupported},
1019   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
1020   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
1021 #endif // INCLUDE_NMT
1022   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
1023   {CC"deoptimizeMethod",   CC"(Ljava/lang/reflect/Executable;Z)I",
1024                                                       (void*)&WB_DeoptimizeMethod  },
1025   {CC"isMethodCompiled",   CC"(Ljava/lang/reflect/Executable;Z)Z",
1026                                                       (void*)&WB_IsMethodCompiled  },
1027   {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1028                                                       (void*)&WB_IsMethodCompilable},
1029   {CC"isMethodQueuedForCompilation",
1030       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
1031   {CC"makeMethodNotCompilable",
1032       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
1033   {CC"testSetDontInlineMethod",
1034       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
1035   {CC"getMethodCompilationLevel",
1036       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
1037   {CC"getMethodEntryBci",
1038       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
1039   {CC"getCompileQueueSize",
1040       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
1041   {CC"testSetForceInlineMethod",
1042       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
1043   {CC"enqueueMethodForCompilation",
1044       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
1045   {CC"clearMethodState",
1046       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
1047   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1048   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1049   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1050   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1051   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1052   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
1053                                                       (void*)&WB_SetStringVMFlag},
1054   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1055                                                       (void*)&WB_GetBooleanVMFlag},
1056   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1057                                                       (void*)&WB_GetIntxVMFlag},
1058   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1059                                                       (void*)&WB_GetUintxVMFlag},
1060   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
1061                                                       (void*)&WB_GetUint64VMFlag},
1062   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
1063                                                       (void*)&WB_GetDoubleVMFlag},
1064   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
1065                                                       (void*)&WB_GetStringVMFlag},
1066   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
1067   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
1068   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
1069   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
1070   {CC"allocateMetaspace",
1071      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
1072   {CC"freeMetaspace",
1073      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
1074   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
1075   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
1076   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
1077   {CC"getNMethod",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1078                                                       (void*)&WB_GetNMethod         },
1079 };
1080 
1081 #undef CC
1082 
1083 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1084   {
1085     if (WhiteBoxAPI) {
1086       // Make sure that wbclass is loaded by the null classloader
1087       instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1088       Handle loader(ikh->class_loader());
1089       if (loader.is_null()) {
1090         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1091         WhiteBox::register_extended(env, wbclass, thread);
1092         WhiteBox::set_used();
1093       }
1094     }
1095   }
1096 JVM_END