1 /*
   2  * Copyright (c) 2012, 2015, 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/stringTable.hpp"
  31 #include "code/codeCache.hpp"
  32 #include "compiler/methodMatcher.hpp"
  33 #include "jvmtifiles/jvmtiEnv.hpp"
  34 #include "memory/metadataFactory.hpp"
  35 #include "memory/metaspaceShared.hpp"
  36 #include "memory/universe.hpp"
  37 #include "oops/oop.inline.hpp"
  38 #include "prims/wbtestmethods/parserTests.hpp"
  39 #include "prims/whitebox.hpp"
  40 #include "runtime/arguments.hpp"
  41 #include "runtime/compilationPolicy.hpp"
  42 #include "runtime/deoptimization.hpp"
  43 #include "runtime/interfaceSupport.hpp"
  44 #include "runtime/javaCalls.hpp"
  45 #include "runtime/os.hpp"
  46 #include "runtime/sweeper.hpp"
  47 #include "runtime/thread.hpp"
  48 #include "runtime/vm_version.hpp"
  49 #include "utilities/array.hpp"
  50 #include "utilities/debug.hpp"
  51 #include "utilities/exceptions.hpp"
  52 #include "utilities/macros.hpp"
  53 #if INCLUDE_ALL_GCS
  54 #include "gc/g1/concurrentMark.hpp"
  55 #include "gc/g1/concurrentMarkThread.hpp"
  56 #include "gc/g1/g1CollectedHeap.inline.hpp"
  57 #include "gc/g1/heapRegionRemSet.hpp"
  58 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
  59 #include "gc/parallel/adjoiningGenerations.hpp"
  60 #endif // INCLUDE_ALL_GCS
  61 #if INCLUDE_NMT
  62 #include "services/mallocSiteTable.hpp"
  63 #include "services/memTracker.hpp"
  64 #include "utilities/nativeCallStack.hpp"
  65 #endif // INCLUDE_NMT
  66 
  67 
  68 #define SIZE_T_MAX_VALUE ((size_t) -1)
  69 
  70 bool WhiteBox::_used = false;
  71 volatile bool WhiteBox::compilation_locked = false;
  72 
  73 class VM_WhiteBoxOperation : public VM_Operation {
  74  public:
  75   VM_WhiteBoxOperation()                         { }
  76   VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
  77   bool allow_nested_vm_operations() const        { return true; }
  78 };
  79 
  80 
  81 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  82   return (jlong)(void*)JNIHandles::resolve(obj);
  83 WB_END
  84 
  85 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  86   return heapOopSize;
  87 WB_END
  88 
  89 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
  90   return os::vm_page_size();
  91 WB_END
  92 
  93 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
  94   return os::vm_allocation_granularity();
  95 WB_END
  96 
  97 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
  98   return os::large_page_size();
  99 WB_END
 100 
 101 class WBIsKlassAliveClosure : public KlassClosure {
 102     Symbol* _name;
 103     bool _found;
 104 public:
 105     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
 106 
 107     void do_klass(Klass* k) {
 108       if (_found) return;
 109       Symbol* ksym = k->name();
 110       if (ksym->fast_compare(_name) == 0) {
 111         _found = true;
 112       }
 113     }
 114 
 115     bool found() const {
 116         return _found;
 117     }
 118 };
 119 
 120 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
 121   Handle h_name = JNIHandles::resolve(name);
 122   if (h_name.is_null()) return false;
 123   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
 124   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
 125 
 126   WBIsKlassAliveClosure closure(sym);
 127   ClassLoaderDataGraph::classes_do(&closure);
 128 
 129   return closure.found();
 130 WB_END
 131 
 132 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 133 #if INCLUDE_JVMTI
 134   ResourceMark rm;
 135   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 136   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 137   jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
 138   assert(err == JVMTI_ERROR_NONE, "must not fail");
 139 #endif
 140 }
 141 WB_END
 142 
 143 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
 144 #if INCLUDE_JVMTI
 145   ResourceMark rm;
 146   const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
 147   JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
 148   jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
 149   assert(err == JVMTI_ERROR_NONE, "must not fail");
 150 #endif
 151 }
 152 WB_END
 153 
 154 
 155 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
 156   return (jlong)Arguments::max_heap_for_compressed_oops();
 157 }
 158 WB_END
 159 
 160 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
 161   CollectorPolicy * p = Universe::heap()->collector_policy();
 162   tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
 163     SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
 164     p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
 165     p->space_alignment(), p->heap_alignment());
 166 }
 167 WB_END
 168 
 169 #ifndef PRODUCT
 170 // Forward declaration
 171 void TestReservedSpace_test();
 172 void TestReserveMemorySpecial_test();
 173 void TestVirtualSpace_test();
 174 void TestMetaspaceAux_test();
 175 #endif
 176 
 177 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
 178 #ifndef PRODUCT
 179   TestReservedSpace_test();
 180   TestReserveMemorySpecial_test();
 181   TestVirtualSpace_test();
 182   TestMetaspaceAux_test();
 183 #endif
 184 WB_END
 185 
 186 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
 187   size_t granularity = os::vm_allocation_granularity();
 188   ReservedHeapSpace rhs(100 * granularity, granularity, false);
 189   VirtualSpace vs;
 190   vs.initialize(rhs, 50 * granularity);
 191 
 192   // Check if constraints are complied
 193   if (!( UseCompressedOops && rhs.base() != NULL &&
 194          Universe::narrow_oop_base() != NULL &&
 195          Universe::narrow_oop_use_implicit_null_checks() )) {
 196     tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
 197                   "\tUseCompressedOops is %d\n"
 198                   "\trhs.base() is " PTR_FORMAT "\n"
 199                   "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
 200                   "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
 201                   UseCompressedOops,
 202                   p2i(rhs.base()),
 203                   p2i(Universe::narrow_oop_base()),
 204                   Universe::narrow_oop_use_implicit_null_checks());
 205     return;
 206   }
 207   tty->print_cr("Reading from no access area... ");
 208   tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
 209                 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
 210 WB_END
 211 
 212 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
 213                                            size_t magnitude, size_t iterations) {
 214   size_t granularity = os::vm_allocation_granularity();
 215   ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
 216   VirtualSpace vs;
 217   if (!vs.initialize(rhs, 0)) {
 218     tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
 219     return 3;
 220   }
 221 
 222   long seed = os::random();
 223   tty->print_cr("Random seed is %ld", seed);
 224   os::init_random(seed);
 225 
 226   for (size_t i = 0; i < iterations; i++) {
 227 
 228     // Whether we will shrink or grow
 229     bool shrink = os::random() % 2L == 0;
 230 
 231     // Get random delta to resize virtual space
 232     size_t delta = (size_t)os::random() % magnitude;
 233 
 234     // If we are about to shrink virtual space below zero, then expand instead
 235     if (shrink && vs.committed_size() < delta) {
 236       shrink = false;
 237     }
 238 
 239     // Resizing by delta
 240     if (shrink) {
 241       vs.shrink_by(delta);
 242     } else {
 243       // If expanding fails expand_by will silently return false
 244       vs.expand_by(delta, true);
 245     }
 246   }
 247   return 0;
 248 }
 249 
 250 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
 251         jlong reserved_space_size, jlong magnitude, jlong iterations))
 252   tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
 253                 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
 254                 iterations);
 255   if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
 256     tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
 257     return 1;
 258   }
 259 
 260   // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
 261   // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
 262   if (sizeof(size_t) < sizeof(jlong)) {
 263     jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
 264     if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
 265         || iterations > size_t_max_value) {
 266       tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
 267       return 2;
 268     }
 269   }
 270 
 271   return wb_stress_virtual_space_resize((size_t) reserved_space_size,
 272                                         (size_t) magnitude, (size_t) iterations);
 273 WB_END
 274 
 275 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
 276   oop p = JNIHandles::resolve(obj);
 277 #if INCLUDE_ALL_GCS
 278   if (UseG1GC) {
 279     G1CollectedHeap* g1 = G1CollectedHeap::heap();
 280     const HeapRegion* hr = g1->heap_region_containing(p);
 281     if (hr == NULL) {
 282       return false;
 283     }
 284     return !(hr->is_young());
 285   } else if (UseParallelGC) {
 286     ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
 287     return !psh->is_in_young(p);
 288   }
 289 #endif // INCLUDE_ALL_GCS
 290   GenCollectedHeap* gch = GenCollectedHeap::heap();
 291   return !gch->is_in_young(p);
 292 WB_END
 293 
 294 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
 295   oop p = JNIHandles::resolve(obj);
 296   return p->size() * HeapWordSize;
 297 WB_END
 298 
 299 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
 300   size_t alignment = Universe::heap()->collector_policy()->space_alignment();
 301   return (jlong)alignment;
 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->is_humongous();
 310 WB_END
 311 
 312 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
 313   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 314   const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 315   return hr->is_humongous();
 316 WB_END
 317 
 318 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
 319   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 320   const HeapRegion* hr = g1->heap_region_containing((void*) addr);
 321   return hr->is_free();
 322 WB_END
 323 
 324 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
 325   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 326   size_t nr = g1->max_regions();
 327   return (jlong)nr;
 328 WB_END
 329 
 330 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 331   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 332   size_t nr = g1->num_free_regions();
 333   return (jlong)nr;
 334 WB_END
 335 
 336 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 337   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 338   return g1h->concurrent_mark()->cmThread()->during_cycle();
 339 WB_END
 340 
 341 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
 342   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 343   if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
 344     g1h->collect(GCCause::_wb_conc_mark);
 345     return true;
 346   }
 347   return false;
 348 WB_END
 349 
 350 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 351   return (jint)HeapRegion::GrainBytes;
 352 WB_END
 353 
 354 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
 355   ParallelScavengeHeap* ps = ParallelScavengeHeap::heap();
 356   size_t alignment = ps->gens()->virtual_spaces()->alignment();
 357   return (jlong)alignment;
 358 WB_END
 359 
 360 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
 361   size_t alignment = ParallelScavengeHeap::heap()->generation_alignment();
 362   return (jlong)alignment;
 363 WB_END
 364 
 365 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
 366   ResourceMark rm(THREAD);
 367   G1CollectedHeap* g1h = G1CollectedHeap::heap();
 368   MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
 369   Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
 370   return JNIHandles::make_local(env, h());
 371 WB_END
 372 #endif // INCLUDE_ALL_GCS
 373 
 374 #if INCLUDE_NMT
 375 // Alloc memory using the test memory type so that we can use that to see if
 376 // NMT picks it up correctly
 377 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
 378   jlong addr = 0;
 379   addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
 380   return addr;
 381 WB_END
 382 
 383 // Alloc memory with pseudo call stack. The test can create psudo malloc
 384 // allocation site to stress the malloc tracking.
 385 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
 386   address pc = (address)(size_t)pseudo_stack;
 387   NativeCallStack stack(&pc, 1);
 388   return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
 389 WB_END
 390 
 391 // Free the memory allocated by NMTAllocTest
 392 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
 393   os::free((void*)(uintptr_t)mem);
 394 WB_END
 395 
 396 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
 397   jlong addr = 0;
 398 
 399   addr = (jlong)(uintptr_t)os::reserve_memory(size);
 400   MemTracker::record_virtual_memory_type((address)addr, mtTest);
 401 
 402   return addr;
 403 WB_END
 404 
 405 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 406   os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
 407   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 408 WB_END
 409 
 410 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 411   os::uncommit_memory((char *)(uintptr_t)addr, size);
 412 WB_END
 413 
 414 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
 415   os::release_memory((char *)(uintptr_t)addr, size);
 416 WB_END
 417 
 418 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
 419   // Test that we can downgrade NMT levels but not upgrade them.
 420   if (MemTracker::tracking_level() == NMT_off) {
 421     MemTracker::transition_to(NMT_off);
 422     return MemTracker::tracking_level() == NMT_off;
 423   } else {
 424     assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
 425     MemTracker::transition_to(NMT_summary);
 426     assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
 427 
 428     // Can't go to detail once NMT is set to summary.
 429     MemTracker::transition_to(NMT_detail);
 430     assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
 431 
 432     // Shutdown sets tracking level to minimal.
 433     MemTracker::shutdown();
 434     assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
 435 
 436     // Once the tracking level is minimal, we cannot increase to summary.
 437     // The code ignores this request instead of asserting because if the malloc site
 438     // table overflows in another thread, it tries to change the code to summary.
 439     MemTracker::transition_to(NMT_summary);
 440     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 441 
 442     // Really can never go up to detail, verify that the code would never do this.
 443     MemTracker::transition_to(NMT_detail);
 444     assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
 445     return MemTracker::tracking_level() == NMT_minimal;
 446   }
 447 WB_END
 448 
 449 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
 450   int hash_size = MallocSiteTable::hash_buckets();
 451   assert(hash_size > 0, "NMT hash_size should be > 0");
 452   return (jint)hash_size;
 453 WB_END
 454 #endif // INCLUDE_NMT
 455 
 456 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
 457   assert(method != NULL, "method should not be null");
 458   ThreadToNativeFromVM ttn(thread);
 459   return env->FromReflectedMethod(method);
 460 }
 461 
 462 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
 463 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
 464  private:
 465   int _result;
 466   const bool _make_not_entrant;
 467  public:
 468   VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
 469         _result(0), _make_not_entrant(make_not_entrant) { }
 470   int  result() const { return _result; }
 471 
 472   void doit() {
 473     for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
 474       if (t->has_last_Java_frame()) {
 475         for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
 476           frame* f = fst.current();
 477           if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
 478             RegisterMap* reg_map = fst.register_map();
 479             Deoptimization::deoptimize(t, *f, reg_map);
 480             if (_make_not_entrant) {
 481                 nmethod* nm = CodeCache::find_nmethod(f->pc());
 482                 assert(nm != NULL, "sanity check");
 483                 nm->make_not_entrant();
 484             }
 485             ++_result;
 486           }
 487         }
 488       }
 489     }
 490   }
 491 };
 492 
 493 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
 494   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
 495   VMThread::execute(&op);
 496   return op.result();
 497 WB_END
 498 
 499 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
 500   MutexLockerEx mu(Compile_lock);
 501   CodeCache::mark_all_nmethods_for_deoptimization();
 502   VM_Deoptimize op;
 503   VMThread::execute(&op);
 504 WB_END
 505 
 506 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 507   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 508   int result = 0;
 509   CHECK_JNI_EXCEPTION_(env, result);
 510   MutexLockerEx mu(Compile_lock);
 511   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 512   if (is_osr) {
 513     result += mh->mark_osr_nmethods();
 514   } else if (mh->code() != NULL) {
 515     mh->code()->mark_for_deoptimization();
 516     ++result;
 517   }
 518   result += CodeCache::mark_for_deoptimization(mh());
 519   if (result > 0) {
 520     VM_Deoptimize op;
 521     VMThread::execute(&op);
 522   }
 523   return result;
 524 WB_END
 525 
 526 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 527   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 528   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 529   MutexLockerEx mu(Compile_lock);
 530   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 531   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 532   if (code == NULL) {
 533     return JNI_FALSE;
 534   }
 535   return (code->is_alive() && !code->is_marked_for_deoptimization());
 536 WB_END
 537 
 538 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 539   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 540   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 541   MutexLockerEx mu(Compile_lock);
 542   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 543   if (is_osr) {
 544     return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
 545   } else {
 546     return CompilationPolicy::can_be_compiled(mh, comp_level);
 547   }
 548 WB_END
 549 
 550 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
 551   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 552   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 553   MutexLockerEx mu(Compile_lock);
 554   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 555   return mh->queued_for_compilation();
 556 WB_END
 557 
 558 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
 559   if (compLevel < CompLevel_none || compLevel > CompLevel_highest_tier) {
 560     return false; // Intrinsic is not available on a non-existent compilation level.
 561   }
 562   jmethodID method_id, compilation_context_id;
 563   method_id = reflected_method_to_jmid(thread, env, method);
 564   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 565   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
 566 
 567   DirectiveSet* directive;
 568   AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
 569   if (compilation_context != NULL) {
 570     compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
 571     CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 572     methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
 573     directive = DirectivesStack::getMatchingDirective(cch, comp);
 574   } else {
 575     // Calling with NULL matches default directive
 576     directive = DirectivesStack::getDefaultDirective(comp);
 577   }
 578   bool result = CompileBroker::compiler(compLevel)->is_intrinsic_available(mh, directive);
 579   DirectivesStack::release(directive);
 580   return result;
 581 WB_END
 582 
 583 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
 584   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 585   CHECK_JNI_EXCEPTION_(env, CompLevel_none);
 586   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 587   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
 588   return (code != NULL ? code->comp_level() : CompLevel_none);
 589 WB_END
 590 
 591 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
 592   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 593   CHECK_JNI_EXCEPTION(env);
 594   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 595   if (is_osr) {
 596     mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
 597   } else {
 598     mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
 599   }
 600 WB_END
 601 
 602 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
 603   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 604   CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
 605   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 606   nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
 607   return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
 608 WB_END
 609 
 610 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 611   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 612   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 613   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 614   bool result = mh->dont_inline();
 615   mh->set_dont_inline(value == JNI_TRUE);
 616   return result;
 617 WB_END
 618 
 619 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
 620   if (comp_level == CompLevel_any) {
 621     return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
 622         CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
 623   } else {
 624     return CompileBroker::queue_size(comp_level);
 625   }
 626 WB_END
 627 
 628 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
 629   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 630   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 631   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 632   bool result = mh->force_inline();
 633   mh->set_force_inline(value == JNI_TRUE);
 634   return result;
 635 WB_END
 636 
 637 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
 638   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 639   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 640   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 641   nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
 642   MutexLockerEx mu(Compile_lock);
 643   return (mh->queued_for_compilation() || nm != NULL);
 644 WB_END
 645 
 646 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method))
 647   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 648   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 649 
 650   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 651   DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(CompLevel_simple));
 652   bool result = directive->PrintAssemblyOption;
 653   DirectivesStack::release(directive);
 654 
 655   return result;
 656 WB_END
 657 
 658 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
 659   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 660   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 661 
 662   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 663 
 664   ResourceMark rm;
 665   const char* error_msg = NULL;
 666   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 667   InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
 668 
 669   if (m == NULL) {
 670     assert(error_msg != NULL, "Always have an error message");
 671     tty->print_cr("Got error: %s", error_msg);
 672     return -1; // Pattern failed
 673   }
 674 
 675   // Pattern works - now check if it matches
 676   int result;
 677   if (m->match(mh, InlineMatcher::force_inline)) {
 678     result = 2; // Force inline match
 679   } else if (m->match(mh, InlineMatcher::dont_inline)) {
 680     result = 1; // Dont inline match
 681   } else {
 682     result = 0; // No match
 683   }
 684   delete m;
 685   return result;
 686 WB_END
 687 
 688 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
 689   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 690   CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
 691 
 692   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 693 
 694   ResourceMark rm;
 695   char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
 696 
 697   const char* error_msg = NULL;
 698 
 699   BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
 700   if (m == NULL) {
 701     assert(error_msg != NULL, "Must have error_msg");
 702     tty->print_cr("Got error: %s", error_msg);
 703     return -1;
 704   }
 705 
 706   // Pattern works - now check if it matches
 707   int result = m->matches(mh);
 708   delete m;
 709   assert(result == 0 || result == 1, "Result out of range");
 710   return result;
 711 WB_END
 712 
 713 class AlwaysFalseClosure : public BoolObjectClosure {
 714  public:
 715   bool do_object_b(oop p) { return false; }
 716 };
 717 
 718 static AlwaysFalseClosure always_false;
 719 
 720 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
 721   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
 722   CHECK_JNI_EXCEPTION(env);
 723   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
 724   MutexLockerEx mu(Compile_lock);
 725   MethodData* mdo = mh->method_data();
 726   MethodCounters* mcs = mh->method_counters();
 727 
 728   if (mdo != NULL) {
 729     mdo->init();
 730     ResourceMark rm;
 731     int arg_count = mdo->method()->size_of_parameters();
 732     for (int i = 0; i < arg_count; i++) {
 733       mdo->set_arg_modified(i, 0);
 734     }
 735     MutexLockerEx mu(mdo->extra_data_lock());
 736     mdo->clean_method_data(&always_false);
 737   }
 738 
 739   mh->clear_not_c1_compilable();
 740   mh->clear_not_c2_compilable();
 741   mh->clear_not_c2_osr_compilable();
 742   NOT_PRODUCT(mh->set_compiled_invocation_count(0));
 743   if (mcs != NULL) {
 744     mcs->backedge_counter()->init();
 745     mcs->invocation_counter()->init();
 746     mcs->set_interpreter_invocation_count(0);
 747     mcs->set_interpreter_throwout_count(0);
 748 
 749 #ifdef TIERED
 750     mcs->set_rate(0.0F);
 751     mh->set_prev_event_count(0);
 752     mh->set_prev_time(0);
 753 #endif
 754   }
 755 WB_END
 756 
 757 template <typename T>
 758 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
 759   if (name == NULL) {
 760     return false;
 761   }
 762   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 763   const char* flag_name = env->GetStringUTFChars(name, NULL);
 764   Flag::Error result = (*TAt)(flag_name, value, true, true);
 765   env->ReleaseStringUTFChars(name, flag_name);
 766   return (result == Flag::SUCCESS);
 767 }
 768 
 769 template <typename T>
 770 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
 771   if (name == NULL) {
 772     return false;
 773   }
 774   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 775   const char* flag_name = env->GetStringUTFChars(name, NULL);
 776   Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
 777   env->ReleaseStringUTFChars(name, flag_name);
 778   return (result == Flag::SUCCESS);
 779 }
 780 
 781 template <typename T>
 782 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
 783   ResourceMark rm(thread);
 784   jclass clazz = env->FindClass(name->as_C_string());
 785   CHECK_JNI_EXCEPTION_(env, NULL);
 786   jmethodID methodID = env->GetStaticMethodID(clazz,
 787         vmSymbols::valueOf_name()->as_C_string(),
 788         sig->as_C_string());
 789   CHECK_JNI_EXCEPTION_(env, NULL);
 790   jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
 791   CHECK_JNI_EXCEPTION_(env, NULL);
 792   return result;
 793 }
 794 
 795 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
 796   return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
 797 }
 798 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
 799   return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
 800 }
 801 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
 802   return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
 803 }
 804 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
 805   return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
 806 }*/
 807 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
 808   return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
 809 }
 810 
 811 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
 812   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 813   const char* flag_name = env->GetStringUTFChars(name, NULL);
 814   Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
 815   env->ReleaseStringUTFChars(name, flag_name);
 816   return result;
 817 }
 818 
 819 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
 820   Flag* flag = getVMFlag(thread, env, name);
 821   return (flag != NULL) && flag->is_constant_in_binary();
 822 WB_END
 823 
 824 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
 825   Flag* flag = getVMFlag(thread, env, name);
 826   return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
 827 WB_END
 828 
 829 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
 830   bool result;
 831   if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
 832     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 833     return booleanBox(thread, env, result);
 834   }
 835   return NULL;
 836 WB_END
 837 
 838 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
 839   int result;
 840   if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
 841     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 842     return longBox(thread, env, result);
 843   }
 844   return NULL;
 845 WB_END
 846 
 847 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
 848   uint result;
 849   if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
 850     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 851     return longBox(thread, env, result);
 852   }
 853   return NULL;
 854 WB_END
 855 
 856 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
 857   intx result;
 858   if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
 859     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 860     return longBox(thread, env, result);
 861   }
 862   return NULL;
 863 WB_END
 864 
 865 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
 866   uintx result;
 867   if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
 868     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 869     return longBox(thread, env, result);
 870   }
 871   return NULL;
 872 WB_END
 873 
 874 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
 875   uint64_t result;
 876   if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
 877     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 878     return longBox(thread, env, result);
 879   }
 880   return NULL;
 881 WB_END
 882 
 883 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
 884   uintx result;
 885   if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
 886     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 887     return longBox(thread, env, result);
 888   }
 889   return NULL;
 890 WB_END
 891 
 892 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
 893   double result;
 894   if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
 895     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 896     return doubleBox(thread, env, result);
 897   }
 898   return NULL;
 899 WB_END
 900 
 901 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
 902   ccstr ccstrResult;
 903   if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
 904     ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 905     jstring result = env->NewStringUTF(ccstrResult);
 906     CHECK_JNI_EXCEPTION_(env, NULL);
 907     return result;
 908   }
 909   return NULL;
 910 WB_END
 911 
 912 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
 913   bool result = value == JNI_TRUE ? true : false;
 914   SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
 915 WB_END
 916 
 917 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 918   int result = value;
 919   SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
 920 WB_END
 921 
 922 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 923   uint result = value;
 924   SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
 925 WB_END
 926 
 927 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 928   intx result = value;
 929   SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
 930 WB_END
 931 
 932 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 933   uintx result = value;
 934   SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
 935 WB_END
 936 
 937 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 938   uint64_t result = value;
 939   SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
 940 WB_END
 941 
 942 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
 943   size_t result = value;
 944   SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
 945 WB_END
 946 
 947 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
 948   double result = value;
 949   SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
 950 WB_END
 951 
 952 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
 953   ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
 954   const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
 955   ccstr ccstrResult = ccstrValue;
 956   bool needFree;
 957   {
 958     ThreadInVMfromNative ttvfn(thread); // back to VM
 959     needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
 960   }
 961   if (value != NULL) {
 962     env->ReleaseStringUTFChars(value, ccstrValue);
 963   }
 964   if (needFree) {
 965     FREE_C_HEAP_ARRAY(char, ccstrResult);
 966   }
 967 WB_END
 968 
 969 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
 970   WhiteBox::compilation_locked = true;
 971 WB_END
 972 
 973 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
 974   MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
 975   WhiteBox::compilation_locked = false;
 976   mo.notify_all();
 977 WB_END
 978 
 979 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
 980   // Force a code cache sweep and block until it finished
 981   NMethodSweeper::force_sweep();
 982 WB_END
 983 
 984 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
 985   ResourceMark rm(THREAD);
 986   int len;
 987   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
 988   return (StringTable::lookup(name, len) != NULL);
 989 WB_END
 990 
 991 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
 992   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
 993   Universe::heap()->collect(GCCause::_last_ditch_collection);
 994 #if INCLUDE_ALL_GCS
 995   if (UseG1GC) {
 996     // Needs to be cleared explicitly for G1
 997     Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
 998   }
 999 #endif // INCLUDE_ALL_GCS
1000 WB_END
1001 
1002 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1003   Universe::heap()->collect(GCCause::_wb_young_gc);
1004 WB_END
1005 
1006 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1007   // static+volatile in order to force the read to happen
1008   // (not be eliminated by the compiler)
1009   static char c;
1010   static volatile char* p;
1011 
1012   p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1013   if (p == NULL) {
1014     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1015   }
1016 
1017   c = *p;
1018 WB_END
1019 
1020 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1021   const char* features = VM_Version::features_string();
1022   ThreadToNativeFromVM ttn(thread);
1023   jstring features_string = env->NewStringUTF(features);
1024 
1025   CHECK_JNI_EXCEPTION_(env, NULL);
1026 
1027   return features_string;
1028 WB_END
1029 
1030 int WhiteBox::get_blob_type(const CodeBlob* code) {
1031   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1032   return CodeCache::get_code_heap(code)->code_blob_type();
1033 }
1034 
1035 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1036   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1037   return CodeCache::get_code_heap(blob_type);
1038 }
1039 
1040 struct CodeBlobStub {
1041   CodeBlobStub(const CodeBlob* blob) :
1042       name(os::strdup(blob->name())),
1043       size(blob->size()),
1044       blob_type(WhiteBox::get_blob_type(blob)),
1045       address((jlong) blob) { }
1046   ~CodeBlobStub() { os::free((void*) name); }
1047   const char* const name;
1048   const jint        size;
1049   const jint        blob_type;
1050   const jlong       address;
1051 };
1052 
1053 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1054   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1055   CHECK_JNI_EXCEPTION_(env, NULL);
1056   jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1057 
1058   jstring name = env->NewStringUTF(cb->name);
1059   CHECK_JNI_EXCEPTION_(env, NULL);
1060   env->SetObjectArrayElement(result, 0, name);
1061 
1062   jobject obj = integerBox(thread, env, cb->size);
1063   CHECK_JNI_EXCEPTION_(env, NULL);
1064   env->SetObjectArrayElement(result, 1, obj);
1065 
1066   obj = integerBox(thread, env, cb->blob_type);
1067   CHECK_JNI_EXCEPTION_(env, NULL);
1068   env->SetObjectArrayElement(result, 2, obj);
1069 
1070   obj = longBox(thread, env, cb->address);
1071   CHECK_JNI_EXCEPTION_(env, NULL);
1072   env->SetObjectArrayElement(result, 3, obj);
1073 
1074   return result;
1075 }
1076 
1077 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1078   ResourceMark rm(THREAD);
1079   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1080   CHECK_JNI_EXCEPTION_(env, NULL);
1081   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1082   nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1083   jobjectArray result = NULL;
1084   if (code == NULL) {
1085     return result;
1086   }
1087   int insts_size = code->insts_size();
1088 
1089   ThreadToNativeFromVM ttn(thread);
1090   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1091   CHECK_JNI_EXCEPTION_(env, NULL);
1092   result = env->NewObjectArray(5, clazz, NULL);
1093   if (result == NULL) {
1094     return result;
1095   }
1096 
1097   CodeBlobStub stub(code);
1098   jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1099   env->SetObjectArrayElement(result, 0, codeBlob);
1100 
1101   jobject level = integerBox(thread, env, code->comp_level());
1102   CHECK_JNI_EXCEPTION_(env, NULL);
1103   env->SetObjectArrayElement(result, 1, level);
1104 
1105   jbyteArray insts = env->NewByteArray(insts_size);
1106   CHECK_JNI_EXCEPTION_(env, NULL);
1107   env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1108   env->SetObjectArrayElement(result, 2, insts);
1109 
1110   jobject id = integerBox(thread, env, code->compile_id());
1111   CHECK_JNI_EXCEPTION_(env, NULL);
1112   env->SetObjectArrayElement(result, 3, id);
1113 
1114   jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1115   CHECK_JNI_EXCEPTION_(env, NULL);
1116   env->SetObjectArrayElement(result, 4, entry_point);
1117 
1118   return result;
1119 WB_END
1120 
1121 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1122   guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1123   BufferBlob* blob;
1124   int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1125   if (full_size < size) {
1126     full_size += round_to(size - full_size, oopSize);
1127   }
1128   {
1129     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1130     blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1131     ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1132   }
1133   // Track memory usage statistic after releasing CodeCache_lock
1134   MemoryService::track_code_cache_memory_usage();
1135   return blob;
1136 }
1137 
1138 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1139   if (size < 0) {
1140     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1141       err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1142   }
1143   return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1144 WB_END
1145 
1146 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1147   if (addr == 0) {
1148     return;
1149   }
1150   BufferBlob::free((BufferBlob*) addr);
1151 WB_END
1152 
1153 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1154   ResourceMark rm;
1155   GrowableArray<CodeBlobStub*> blobs;
1156   {
1157     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1158     CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1159     if (heap == NULL) {
1160       return NULL;
1161     }
1162     for (CodeBlob* cb = (CodeBlob*) heap->first();
1163          cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1164       CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1165       new (stub) CodeBlobStub(cb);
1166       blobs.append(stub);
1167     }
1168   }
1169   if (blobs.length() == 0) {
1170     return NULL;
1171   }
1172   ThreadToNativeFromVM ttn(thread);
1173   jobjectArray result = NULL;
1174   jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1175   CHECK_JNI_EXCEPTION_(env, NULL);
1176   result = env->NewObjectArray(blobs.length(), clazz, NULL);
1177   if (result == NULL) {
1178     return result;
1179   }
1180   int i = 0;
1181   for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1182        it != blobs.end(); ++it) {
1183     jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1184     env->SetObjectArrayElement(result, i, obj);
1185     ++i;
1186   }
1187   return result;
1188 WB_END
1189 
1190 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1191   return CompileBroker::get_compilation_activity_mode();
1192 WB_END
1193 
1194 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1195   if (addr == 0) {
1196     THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1197       "WB_GetCodeBlob: addr is null");
1198   }
1199   ThreadToNativeFromVM ttn(thread);
1200   CodeBlobStub stub((CodeBlob*) addr);
1201   return codeBlob2objectArray(thread, env, &stub);
1202 WB_END
1203 
1204 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1205   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1206   CHECK_JNI_EXCEPTION_(env, 0);
1207   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1208   return (jlong) mh->method_data();
1209 WB_END
1210 
1211 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1212   return (jlong) Thread::current()->stack_size();
1213 WB_END
1214 
1215 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1216   JavaThread* t = JavaThread::current();
1217   return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1218 WB_END
1219 
1220 
1221 int WhiteBox::array_bytes_to_length(size_t bytes) {
1222   return Array<u1>::bytes_to_length(bytes);
1223 }
1224 
1225 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1226   if (size < 0) {
1227     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1228         err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1229   }
1230 
1231   oop class_loader_oop = JNIHandles::resolve(class_loader);
1232   ClassLoaderData* cld = class_loader_oop != NULL
1233       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1234       : ClassLoaderData::the_null_class_loader_data();
1235 
1236   void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1237 
1238   return (jlong)(uintptr_t)metadata;
1239 WB_END
1240 
1241 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1242   oop class_loader_oop = JNIHandles::resolve(class_loader);
1243   ClassLoaderData* cld = class_loader_oop != NULL
1244       ? java_lang_ClassLoader::loader_data(class_loader_oop)
1245       : ClassLoaderData::the_null_class_loader_data();
1246 
1247   MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1248 WB_END
1249 
1250 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1251   if (inc < 0) {
1252     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1253         err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1254   }
1255 
1256   jlong max_size_t = (jlong) ((size_t) -1);
1257   if (inc > max_size_t) {
1258     THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1259         err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1260   }
1261 
1262   size_t new_cap_until_GC = 0;
1263   size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1264   bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1265   if (!success) {
1266     THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1267                 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1268                 "due to contention with another thread");
1269   }
1270   return (jlong) new_cap_until_GC;
1271 WB_END
1272 
1273 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1274   return (jlong) MetaspaceGC::capacity_until_GC();
1275 WB_END
1276 
1277 
1278 
1279 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1280   Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1281                                            Monitor::_safepoint_check_always :
1282                                            Monitor::_safepoint_check_never;
1283   MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1284                    attemptedNoSafepointValue == JNI_TRUE);
1285 WB_END
1286 
1287 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1288   return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1289 WB_END
1290 
1291 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1292   oop obj_oop = JNIHandles::resolve(obj);
1293   return (jboolean) obj_oop->mark()->has_monitor();
1294 WB_END
1295 
1296 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1297   VM_ForceSafepoint force_safepoint_op;
1298   VMThread::execute(&force_safepoint_op);
1299 WB_END
1300 
1301 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1302   instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1303   return (jlong) ikh->constants();
1304 WB_END
1305 
1306 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb))
1307   VM_ClearICs clear_ics;
1308   VMThread::execute(&clear_ics);
1309 WB_END
1310 
1311 template <typename T>
1312 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1313   assert(value != NULL, "sanity");
1314   if (method == NULL || name == NULL) {
1315     return false;
1316   }
1317   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1318   CHECK_JNI_EXCEPTION_(env, false);
1319   methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1320   // can't be in VM when we call JNI
1321   ThreadToNativeFromVM ttnfv(thread);
1322   const char* flag_name = env->GetStringUTFChars(name, NULL);
1323   bool result =  CompilerOracle::has_option_value(mh, flag_name, *value);
1324   env->ReleaseStringUTFChars(name, flag_name);
1325   return result;
1326 }
1327 
1328 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1329   bool result;
1330   if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1331     // can't be in VM when we call JNI
1332     ThreadToNativeFromVM ttnfv(thread);
1333     return booleanBox(thread, env, result);
1334   }
1335   return NULL;
1336 WB_END
1337 
1338 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1339   intx result;
1340   if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1341     // can't be in VM when we call JNI
1342     ThreadToNativeFromVM ttnfv(thread);
1343     return longBox(thread, env, result);
1344   }
1345   return NULL;
1346 WB_END
1347 
1348 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1349   uintx result;
1350   if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1351     // can't be in VM when we call JNI
1352     ThreadToNativeFromVM ttnfv(thread);
1353     return longBox(thread, env, result);
1354   }
1355   return NULL;
1356 WB_END
1357 
1358 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1359   double result;
1360   if (GetMethodOption <double> (thread, env, method, name, &result)) {
1361     // can't be in VM when we call JNI
1362     ThreadToNativeFromVM ttnfv(thread);
1363     return doubleBox(thread, env, result);
1364   }
1365   return NULL;
1366 WB_END
1367 
1368 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1369   ccstr ccstrResult;
1370   if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1371     // can't be in VM when we call JNI
1372     ThreadToNativeFromVM ttnfv(thread);
1373     jstring result = env->NewStringUTF(ccstrResult);
1374     CHECK_JNI_EXCEPTION_(env, NULL);
1375     return result;
1376   }
1377   return NULL;
1378 WB_END
1379 
1380 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1381   oop obj_oop = JNIHandles::resolve(obj);
1382   return MetaspaceShared::is_in_shared_space((void*)obj_oop);
1383 WB_END
1384 
1385 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1386   return StringTable::shared_string_ignored();
1387 WB_END
1388 
1389 //Some convenience methods to deal with objects from java
1390 int WhiteBox::offset_for_field(const char* field_name, oop object,
1391     Symbol* signature_symbol) {
1392   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1393   Thread* THREAD = Thread::current();
1394 
1395   //Get the class of our object
1396   Klass* arg_klass = object->klass();
1397   //Turn it into an instance-klass
1398   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1399 
1400   //Create symbols to look for in the class
1401   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1402       THREAD);
1403 
1404   //To be filled in with an offset of the field we're looking for
1405   fieldDescriptor fd;
1406 
1407   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1408   if (res == NULL) {
1409     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1410         name_symbol->as_C_string());
1411     vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
1412   }
1413 
1414   //fetch the field at the offset we've found
1415   int dest_offset = fd.offset();
1416 
1417   return dest_offset;
1418 }
1419 
1420 
1421 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1422   int offset = offset_for_field(field_name, object,
1423       vmSymbols::string_signature());
1424   oop string = object->obj_field(offset);
1425   if (string == NULL) {
1426     return NULL;
1427   }
1428   const char* ret = java_lang_String::as_utf8_string(string);
1429   return ret;
1430 }
1431 
1432 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1433   int offset =
1434       offset_for_field(field_name, object, vmSymbols::bool_signature());
1435   bool ret = (object->bool_field(offset) == JNI_TRUE);
1436   return ret;
1437 }
1438 
1439 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1440   ResourceMark rm;
1441   ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1442 
1443   //  one by one registration natives for exception catching
1444   jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1445   CHECK_JNI_EXCEPTION(env);
1446   for (int i = 0, n = method_count; i < n; ++i) {
1447     // Skip dummy entries
1448     if (method_array[i].fnPtr == NULL) continue;
1449     if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1450       jthrowable throwable_obj = env->ExceptionOccurred();
1451       if (throwable_obj != NULL) {
1452         env->ExceptionClear();
1453         if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1454           // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1455           // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1456           tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1457               method_array[i].name, method_array[i].signature);
1458         }
1459       } else {
1460         // Registration failed unexpectedly.
1461         tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1462             method_array[i].name, method_array[i].signature);
1463         env->UnregisterNatives(wbclass);
1464         break;
1465       }
1466     }
1467   }
1468 }
1469 
1470 #define CC (char*)
1471 
1472 static JNINativeMethod methods[] = {
1473   {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
1474   {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
1475   {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
1476   {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
1477   {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
1478   {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
1479   {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
1480   {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
1481   {CC"isClassAlive0",                    CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
1482   {CC"parseCommandLine0",
1483       CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1484       (void*) &WB_ParseCommandLine
1485   },
1486   {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1487                                                       (void*)&WB_AddToBootstrapClassLoaderSearch},
1488   {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
1489                                                       (void*)&WB_AddToSystemClassLoaderSearch},
1490   {CC"getCompressedOopsMaxHeapSize", CC"()J",
1491       (void*)&WB_GetCompressedOopsMaxHeapSize},
1492   {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
1493   {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
1494   {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
1495   {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
1496   {CC"isSharedClass", CC"(Ljava/lang/Class;)Z",       (void*)&WB_IsSharedClass },
1497 #if INCLUDE_ALL_GCS
1498   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
1499   {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z",(void*)&WB_G1IsHumongous     },
1500   {CC"g1BelongsToHumongousRegion0", CC"(J)Z",         (void*)&WB_G1BelongsToHumongousRegion},
1501   {CC"g1BelongsToFreeRegion0", CC"(J)Z",              (void*)&WB_G1BelongsToFreeRegion},
1502   {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
1503   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
1504   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
1505   {CC"g1StartConcMarkCycle",       CC"()Z",           (void*)&WB_G1StartMarkCycle  },
1506   {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1507                                                       (void*)&WB_G1AuxiliaryMemoryUsage  },
1508   {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
1509   {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
1510 #endif // INCLUDE_ALL_GCS
1511 #if INCLUDE_NMT
1512   {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
1513   {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
1514   {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
1515   {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
1516   {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
1517   {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
1518   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
1519   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
1520   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
1521 #endif // INCLUDE_NMT
1522   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
1523   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
1524     {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
1525                                                         (void*)&WB_DeoptimizeMethod  },
1526   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
1527                                                       (void*)&WB_IsMethodCompiled  },
1528   {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1529                                                       (void*)&WB_IsMethodCompilable},
1530   {CC"isMethodQueuedForCompilation0",
1531       CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
1532   {CC"isIntrinsicAvailable0",
1533       CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1534                                                       (void*)&WB_IsIntrinsicAvailable},
1535   {CC"makeMethodNotCompilable0",
1536       CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
1537   {CC"testSetDontInlineMethod0",
1538       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
1539   {CC"getMethodCompilationLevel0",
1540       CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
1541   {CC"getMethodEntryBci0",
1542       CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
1543   {CC"getCompileQueueSize",
1544       CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
1545   {CC"testSetForceInlineMethod0",
1546       CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
1547   {CC"enqueueMethodForCompilation0",
1548       CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
1549   {CC"clearMethodState0",
1550       CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
1551   {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
1552   {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
1553   {CC"matchesMethod",
1554       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1555                                                       (void*)&WB_MatchesMethod},
1556   {CC"matchesInline",
1557       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1558                                                       (void*)&WB_MatchesInline},
1559   {CC"shouldPrintAssembly",
1560         CC"(Ljava/lang/reflect/Executable;)Z",
1561                                                         (void*)&WB_ShouldPrintAssembly},
1562 
1563   {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1564   {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1565   {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1566   {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1567   {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1568   {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1569   {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1570   {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1571   {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1572   {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1573   {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
1574                                                       (void*)&WB_SetStringVMFlag},
1575   {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1576                                                       (void*)&WB_GetBooleanVMFlag},
1577   {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
1578                                                       (void*)&WB_GetIntVMFlag},
1579   {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1580                                                       (void*)&WB_GetUintVMFlag},
1581   {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1582                                                       (void*)&WB_GetIntxVMFlag},
1583   {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1584                                                       (void*)&WB_GetUintxVMFlag},
1585   {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
1586                                                       (void*)&WB_GetUint64VMFlag},
1587   {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1588                                                       (void*)&WB_GetSizeTVMFlag},
1589   {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
1590                                                       (void*)&WB_GetDoubleVMFlag},
1591   {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
1592                                                       (void*)&WB_GetStringVMFlag},
1593   {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
1594   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
1595   {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
1596   {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
1597   {CC"allocateMetaspace",
1598      CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
1599   {CC"freeMetaspace",
1600      CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
1601   {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
1602   {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
1603   {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
1604   {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1605                                                       (void*)&WB_GetNMethod         },
1606   {CC"forceNMethodSweep",  CC"()V",                   (void*)&WB_ForceNMethodSweep  },
1607   {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
1608   {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
1609   {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1610   {CC"getCompilationActivityMode",
1611                            CC"()I",                   (void*)&WB_GetCompilationActivityMode},
1612   {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
1613                                                       (void*)&WB_GetMethodData      },
1614   {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
1615   {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
1616   {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
1617   {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
1618   {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
1619   {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
1620   {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
1621   {CC"getMethodBooleanOption",
1622       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1623                                                       (void*)&WB_GetMethodBooleaneOption},
1624   {CC"getMethodIntxOption",
1625       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1626                                                       (void*)&WB_GetMethodIntxOption},
1627   {CC"getMethodUintxOption",
1628       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1629                                                       (void*)&WB_GetMethodUintxOption},
1630   {CC"getMethodDoubleOption",
1631       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1632                                                       (void*)&WB_GetMethodDoubleOption},
1633   {CC"getMethodStringOption",
1634       CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1635                                                       (void*)&WB_GetMethodStringOption},
1636   {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
1637   {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
1638   {CC"clearInlineCaches",  CC"()V",                   (void*)&WB_ClearInlineCaches },
1639 };
1640 
1641 #undef CC
1642 
1643 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1644   {
1645     if (WhiteBoxAPI) {
1646       // Make sure that wbclass is loaded by the null classloader
1647       instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1648       Handle loader(ikh->class_loader());
1649       if (loader.is_null()) {
1650         WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1651         WhiteBox::register_extended(env, wbclass, thread);
1652         WhiteBox::set_used();
1653       }
1654     }
1655   }
1656 JVM_END