whitebox.cpp revision 9111:a41fe5ffa839 
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
68PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
69
70#define SIZE_T_MAX_VALUE ((size_t) -1)
71
72bool WhiteBox::_used = false;
73volatile bool WhiteBox::compilation_locked = false;
74
75class VM_WhiteBoxOperation : public VM_Operation {
76 public:
77  VM_WhiteBoxOperation()                         { }
78  VMOp_Type type()                  const        { return VMOp_WhiteBoxOperation; }
79  bool allow_nested_vm_operations() const        { return true; }
80};
81
82
83WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
84  return (jlong)(void*)JNIHandles::resolve(obj);
85WB_END
86
87WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
88  return heapOopSize;
89WB_END
90
91WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
92  return os::vm_page_size();
93WB_END
94
95WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
96  return os::vm_allocation_granularity();
97WB_END
98
99WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
100  return os::large_page_size();
101WB_END
102
103class WBIsKlassAliveClosure : public KlassClosure {
104    Symbol* _name;
105    bool _found;
106public:
107    WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
108
109    void do_klass(Klass* k) {
110      if (_found) return;
111      Symbol* ksym = k->name();
112      if (ksym->fast_compare(_name) == 0) {
113        _found = true;
114      }
115    }
116
117    bool found() const {
118        return _found;
119    }
120};
121
122WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
123  Handle h_name = JNIHandles::resolve(name);
124  if (h_name.is_null()) return false;
125  Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
126  TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
127
128  WBIsKlassAliveClosure closure(sym);
129  ClassLoaderDataGraph::classes_do(&closure);
130
131  return closure.found();
132WB_END
133
134WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
135#if INCLUDE_JVMTI
136  ResourceMark rm;
137  const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
138  JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
139  jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
140  assert(err == JVMTI_ERROR_NONE, "must not fail");
141#endif
142}
143WB_END
144
145WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
146#if INCLUDE_JVMTI
147  ResourceMark rm;
148  const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
149  JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
150  jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
151  assert(err == JVMTI_ERROR_NONE, "must not fail");
152#endif
153}
154WB_END
155
156
157WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
158  return (jlong)Arguments::max_heap_for_compressed_oops();
159}
160WB_END
161
162WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
163  CollectorPolicy * p = Universe::heap()->collector_policy();
164  gclog_or_tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
165    SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
166    p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
167    p->space_alignment(), p->heap_alignment());
168}
169WB_END
170
171#ifndef PRODUCT
172// Forward declaration
173void TestReservedSpace_test();
174void TestReserveMemorySpecial_test();
175void TestVirtualSpace_test();
176void TestMetaspaceAux_test();
177#endif
178
179WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
180#ifndef PRODUCT
181  TestReservedSpace_test();
182  TestReserveMemorySpecial_test();
183  TestVirtualSpace_test();
184  TestMetaspaceAux_test();
185#endif
186WB_END
187
188WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
189  size_t granularity = os::vm_allocation_granularity();
190  ReservedHeapSpace rhs(100 * granularity, granularity, false);
191  VirtualSpace vs;
192  vs.initialize(rhs, 50 * granularity);
193
194  // Check if constraints are complied
195  if (!( UseCompressedOops && rhs.base() != NULL &&
196         Universe::narrow_oop_base() != NULL &&
197         Universe::narrow_oop_use_implicit_null_checks() )) {
198    tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
199                  "\tUseCompressedOops is %d\n"
200                  "\trhs.base() is " PTR_FORMAT "\n"
201                  "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
202                  "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
203                  UseCompressedOops,
204                  rhs.base(),
205                  Universe::narrow_oop_base(),
206                  Universe::narrow_oop_use_implicit_null_checks());
207    return;
208  }
209  tty->print_cr("Reading from no access area... ");
210  tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
211                *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
212WB_END
213
214static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
215                                           size_t magnitude, size_t iterations) {
216  size_t granularity = os::vm_allocation_granularity();
217  ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
218  VirtualSpace vs;
219  if (!vs.initialize(rhs, 0)) {
220    tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
221    return 3;
222  }
223
224  long seed = os::random();
225  tty->print_cr("Random seed is %ld", seed);
226  os::init_random(seed);
227
228  for (size_t i = 0; i < iterations; i++) {
229
230    // Whether we will shrink or grow
231    bool shrink = os::random() % 2L == 0;
232
233    // Get random delta to resize virtual space
234    size_t delta = (size_t)os::random() % magnitude;
235
236    // If we are about to shrink virtual space below zero, then expand instead
237    if (shrink && vs.committed_size() < delta) {
238      shrink = false;
239    }
240
241    // Resizing by delta
242    if (shrink) {
243      vs.shrink_by(delta);
244    } else {
245      // If expanding fails expand_by will silently return false
246      vs.expand_by(delta, true);
247    }
248  }
249  return 0;
250}
251
252WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
253        jlong reserved_space_size, jlong magnitude, jlong iterations))
254  tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
255                "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
256                iterations);
257  if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
258    tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
259    return 1;
260  }
261
262  // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
263  // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
264  if (sizeof(size_t) < sizeof(jlong)) {
265    jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
266    if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
267        || iterations > size_t_max_value) {
268      tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
269      return 2;
270    }
271  }
272
273  return wb_stress_virtual_space_resize((size_t) reserved_space_size,
274                                        (size_t) magnitude, (size_t) iterations);
275WB_END
276
277WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
278  oop p = JNIHandles::resolve(obj);
279#if INCLUDE_ALL_GCS
280  if (UseG1GC) {
281    G1CollectedHeap* g1 = G1CollectedHeap::heap();
282    const HeapRegion* hr = g1->heap_region_containing(p);
283    if (hr == NULL) {
284      return false;
285    }
286    return !(hr->is_young());
287  } else if (UseParallelGC) {
288    ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
289    return !psh->is_in_young(p);
290  }
291#endif // INCLUDE_ALL_GCS
292  GenCollectedHeap* gch = GenCollectedHeap::heap();
293  return !gch->is_in_young(p);
294WB_END
295
296WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
297  oop p = JNIHandles::resolve(obj);
298  return p->size() * HeapWordSize;
299WB_END
300
301WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
302  size_t alignment = Universe::heap()->collector_policy()->space_alignment();
303  return (jlong)alignment;
304WB_END
305
306#if INCLUDE_ALL_GCS
307WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
308  G1CollectedHeap* g1 = G1CollectedHeap::heap();
309  oop result = JNIHandles::resolve(obj);
310  const HeapRegion* hr = g1->heap_region_containing(result);
311  return hr->is_humongous();
312WB_END
313
314WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
315  G1CollectedHeap* g1 = G1CollectedHeap::heap();
316  size_t nr = g1->max_regions();
317  return (jlong)nr;
318WB_END
319
320WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
321  G1CollectedHeap* g1 = G1CollectedHeap::heap();
322  size_t nr = g1->num_free_regions();
323  return (jlong)nr;
324WB_END
325
326WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
327  G1CollectedHeap* g1 = G1CollectedHeap::heap();
328  return g1->concurrent_mark()->cmThread()->during_cycle();
329WB_END
330
331WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
332  G1CollectedHeap* g1h = G1CollectedHeap::heap();
333  if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
334    g1h->collect(GCCause::_wb_conc_mark);
335    return true;
336  }
337  return false;
338WB_END
339
340WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
341  return (jint)HeapRegion::GrainBytes;
342WB_END
343
344WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
345  ParallelScavengeHeap* ps = ParallelScavengeHeap::heap();
346  size_t alignment = ps->gens()->virtual_spaces()->alignment();
347  return (jlong)alignment;
348WB_END
349
350WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
351  size_t alignment = ParallelScavengeHeap::heap()->generation_alignment();
352  return (jlong)alignment;
353WB_END
354
355WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
356  ResourceMark rm(THREAD);
357  G1CollectedHeap* g1h = G1CollectedHeap::heap();
358  MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
359  Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
360  return JNIHandles::make_local(env, h());
361WB_END
362#endif // INCLUDE_ALL_GCS
363
364#if INCLUDE_NMT
365// Alloc memory using the test memory type so that we can use that to see if
366// NMT picks it up correctly
367WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
368  jlong addr = 0;
369  addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
370  return addr;
371WB_END
372
373// Alloc memory with pseudo call stack. The test can create psudo malloc
374// allocation site to stress the malloc tracking.
375WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
376  address pc = (address)(size_t)pseudo_stack;
377  NativeCallStack stack(&pc, 1);
378  return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
379WB_END
380
381// Free the memory allocated by NMTAllocTest
382WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
383  os::free((void*)(uintptr_t)mem);
384WB_END
385
386WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
387  jlong addr = 0;
388
389  addr = (jlong)(uintptr_t)os::reserve_memory(size);
390  MemTracker::record_virtual_memory_type((address)addr, mtTest);
391
392  return addr;
393WB_END
394
395WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
396  os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
397  MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
398WB_END
399
400WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
401  os::uncommit_memory((char *)(uintptr_t)addr, size);
402WB_END
403
404WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
405  os::release_memory((char *)(uintptr_t)addr, size);
406WB_END
407
408WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
409  // Test that we can downgrade NMT levels but not upgrade them.
410  if (MemTracker::tracking_level() == NMT_off) {
411    MemTracker::transition_to(NMT_off);
412    return MemTracker::tracking_level() == NMT_off;
413  } else {
414    assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
415    MemTracker::transition_to(NMT_summary);
416    assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
417
418    // Can't go to detail once NMT is set to summary.
419    MemTracker::transition_to(NMT_detail);
420    assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
421
422    // Shutdown sets tracking level to minimal.
423    MemTracker::shutdown();
424    assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
425
426    // Once the tracking level is minimal, we cannot increase to summary.
427    // The code ignores this request instead of asserting because if the malloc site
428    // table overflows in another thread, it tries to change the code to summary.
429    MemTracker::transition_to(NMT_summary);
430    assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
431
432    // Really can never go up to detail, verify that the code would never do this.
433    MemTracker::transition_to(NMT_detail);
434    assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
435    return MemTracker::tracking_level() == NMT_minimal;
436  }
437WB_END
438
439WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
440  int hash_size = MallocSiteTable::hash_buckets();
441  assert(hash_size > 0, "NMT hash_size should be > 0");
442  return (jint)hash_size;
443WB_END
444#endif // INCLUDE_NMT
445
446static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
447  assert(method != NULL, "method should not be null");
448  ThreadToNativeFromVM ttn(thread);
449  return env->FromReflectedMethod(method);
450}
451
452// Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
453class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
454 private:
455  int _result;
456  const bool _make_not_entrant;
457 public:
458  VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
459        _result(0), _make_not_entrant(make_not_entrant) { }
460  int  result() const { return _result; }
461
462  void doit() {
463    for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
464      if (t->has_last_Java_frame()) {
465        for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
466          frame* f = fst.current();
467          if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
468            RegisterMap* reg_map = fst.register_map();
469            Deoptimization::deoptimize(t, *f, reg_map);
470            if (_make_not_entrant) {
471                nmethod* nm = CodeCache::find_nmethod(f->pc());
472                assert(nm != NULL, "sanity check");
473                nm->make_not_entrant();
474            }
475            ++_result;
476          }
477        }
478      }
479    }
480  }
481};
482
483WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
484  VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
485  VMThread::execute(&op);
486  return op.result();
487WB_END
488
489WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
490  MutexLockerEx mu(Compile_lock);
491  CodeCache::mark_all_nmethods_for_deoptimization();
492  VM_Deoptimize op;
493  VMThread::execute(&op);
494WB_END
495
496WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
497  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
498  int result = 0;
499  CHECK_JNI_EXCEPTION_(env, result);
500  MutexLockerEx mu(Compile_lock);
501  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
502  if (is_osr) {
503    result += mh->mark_osr_nmethods();
504  } else if (mh->code() != NULL) {
505    mh->code()->mark_for_deoptimization();
506    ++result;
507  }
508  result += CodeCache::mark_for_deoptimization(mh());
509  if (result > 0) {
510    VM_Deoptimize op;
511    VMThread::execute(&op);
512  }
513  return result;
514WB_END
515
516WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
517  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
518  CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
519  MutexLockerEx mu(Compile_lock);
520  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
521  nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
522  if (code == NULL) {
523    return JNI_FALSE;
524  }
525  return (code->is_alive() && !code->is_marked_for_deoptimization());
526WB_END
527
528WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
529  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
530  CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
531  MutexLockerEx mu(Compile_lock);
532  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
533  if (is_osr) {
534    return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
535  } else {
536    return CompilationPolicy::can_be_compiled(mh, comp_level);
537  }
538WB_END
539
540WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
541  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
542  CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
543  MutexLockerEx mu(Compile_lock);
544  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
545  return mh->queued_for_compilation();
546WB_END
547
548WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
549  if (compLevel < CompLevel_none || compLevel > CompLevel_highest_tier) {
550    return false; // Intrinsic is not available on a non-existent compilation level.
551  }
552  jmethodID method_id, compilation_context_id;
553  method_id = reflected_method_to_jmid(thread, env, method);
554  CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
555  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
556  if (compilation_context != NULL) {
557    compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
558    CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
559    methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
560    return CompileBroker::compiler(compLevel)->is_intrinsic_available(mh, cch);
561  } else {
562    return CompileBroker::compiler(compLevel)->is_intrinsic_available(mh, NULL);
563  }
564WB_END
565
566WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
567  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
568  CHECK_JNI_EXCEPTION_(env, CompLevel_none);
569  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
570  nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
571  return (code != NULL ? code->comp_level() : CompLevel_none);
572WB_END
573
574WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
575  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
576  CHECK_JNI_EXCEPTION(env);
577  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
578  if (is_osr) {
579    mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
580  } else {
581    mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
582  }
583WB_END
584
585WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
586  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
587  CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
588  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
589  nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
590  return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
591WB_END
592
593WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
594  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
595  CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
596  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
597  bool result = mh->dont_inline();
598  mh->set_dont_inline(value == JNI_TRUE);
599  return result;
600WB_END
601
602WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
603  if (comp_level == CompLevel_any) {
604    return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
605        CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
606  } else {
607    return CompileBroker::queue_size(comp_level);
608  }
609WB_END
610
611WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
612  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
613  CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
614  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
615  bool result = mh->force_inline();
616  mh->set_force_inline(value == JNI_TRUE);
617  return result;
618WB_END
619
620WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
621  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
622  CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
623  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
624  nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
625  MutexLockerEx mu(Compile_lock);
626  return (mh->queued_for_compilation() || nm != NULL);
627WB_END
628
629
630WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
631  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
632  CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
633
634  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
635
636  ResourceMark rm;
637  char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
638
639  const char* error_msg = NULL;
640
641  BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
642  if (m == NULL) {
643    assert(error_msg != NULL, "Must have error_msg");
644    tty->print_cr("Got error: %s", error_msg);
645    return -1;
646  }
647
648  // Pattern works - now check if it matches
649  int result = m->matches(mh);
650  delete m;
651  assert(result == 0 || result == 1, "Result out of range");
652  return result;
653WB_END
654
655class AlwaysFalseClosure : public BoolObjectClosure {
656 public:
657  bool do_object_b(oop p) { return false; }
658};
659
660static AlwaysFalseClosure always_false;
661
662WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
663  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
664  CHECK_JNI_EXCEPTION(env);
665  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
666  MutexLockerEx mu(Compile_lock);
667  MethodData* mdo = mh->method_data();
668  MethodCounters* mcs = mh->method_counters();
669
670  if (mdo != NULL) {
671    mdo->init();
672    ResourceMark rm;
673    int arg_count = mdo->method()->size_of_parameters();
674    for (int i = 0; i < arg_count; i++) {
675      mdo->set_arg_modified(i, 0);
676    }
677    MutexLockerEx mu(mdo->extra_data_lock());
678    mdo->clean_method_data(&always_false);
679  }
680
681  mh->clear_not_c1_compilable();
682  mh->clear_not_c2_compilable();
683  mh->clear_not_c2_osr_compilable();
684  NOT_PRODUCT(mh->set_compiled_invocation_count(0));
685  if (mcs != NULL) {
686    mcs->backedge_counter()->init();
687    mcs->invocation_counter()->init();
688    mcs->set_interpreter_invocation_count(0);
689    mcs->set_interpreter_throwout_count(0);
690
691#ifdef TIERED
692    mcs->set_rate(0.0F);
693    mh->set_prev_event_count(0);
694    mh->set_prev_time(0);
695#endif
696  }
697WB_END
698
699template <typename T>
700static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
701  if (name == NULL) {
702    return false;
703  }
704  ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
705  const char* flag_name = env->GetStringUTFChars(name, NULL);
706  Flag::Error result = (*TAt)(flag_name, value, true, true);
707  env->ReleaseStringUTFChars(name, flag_name);
708  return (result == Flag::SUCCESS);
709}
710
711template <typename T>
712static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
713  if (name == NULL) {
714    return false;
715  }
716  ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
717  const char* flag_name = env->GetStringUTFChars(name, NULL);
718  Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
719  env->ReleaseStringUTFChars(name, flag_name);
720  return (result == Flag::SUCCESS);
721}
722
723template <typename T>
724static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
725  ResourceMark rm(thread);
726  jclass clazz = env->FindClass(name->as_C_string());
727  CHECK_JNI_EXCEPTION_(env, NULL);
728  jmethodID methodID = env->GetStaticMethodID(clazz,
729        vmSymbols::valueOf_name()->as_C_string(),
730        sig->as_C_string());
731  CHECK_JNI_EXCEPTION_(env, NULL);
732  jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
733  CHECK_JNI_EXCEPTION_(env, NULL);
734  return result;
735}
736
737static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
738  return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
739}
740static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
741  return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
742}
743static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
744  return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
745}
746/* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
747  return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
748}*/
749static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
750  return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
751}
752
753static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
754  ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
755  const char* flag_name = env->GetStringUTFChars(name, NULL);
756  Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
757  env->ReleaseStringUTFChars(name, flag_name);
758  return result;
759}
760
761WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
762  Flag* flag = getVMFlag(thread, env, name);
763  return (flag != NULL) && flag->is_constant_in_binary();
764WB_END
765
766WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
767  Flag* flag = getVMFlag(thread, env, name);
768  return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
769WB_END
770
771WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
772  bool result;
773  if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
774    ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
775    return booleanBox(thread, env, result);
776  }
777  return NULL;
778WB_END
779
780WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
781  int result;
782  if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
783    ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
784    return longBox(thread, env, result);
785  }
786  return NULL;
787WB_END
788
789WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
790  uint result;
791  if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
792    ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
793    return longBox(thread, env, result);
794  }
795  return NULL;
796WB_END
797
798WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
799  intx result;
800  if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
801    ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
802    return longBox(thread, env, result);
803  }
804  return NULL;
805WB_END
806
807WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
808  uintx result;
809  if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
810    ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
811    return longBox(thread, env, result);
812  }
813  return NULL;
814WB_END
815
816WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
817  uint64_t result;
818  if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
819    ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
820    return longBox(thread, env, result);
821  }
822  return NULL;
823WB_END
824
825WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
826  uintx result;
827  if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
828    ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
829    return longBox(thread, env, result);
830  }
831  return NULL;
832WB_END
833
834WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
835  double result;
836  if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
837    ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
838    return doubleBox(thread, env, result);
839  }
840  return NULL;
841WB_END
842
843WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
844  ccstr ccstrResult;
845  if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
846    ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
847    jstring result = env->NewStringUTF(ccstrResult);
848    CHECK_JNI_EXCEPTION_(env, NULL);
849    return result;
850  }
851  return NULL;
852WB_END
853
854WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
855  bool result = value == JNI_TRUE ? true : false;
856  SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
857WB_END
858
859WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
860  int result = value;
861  SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
862WB_END
863
864WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
865  uint result = value;
866  SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
867WB_END
868
869WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
870  intx result = value;
871  SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
872WB_END
873
874WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
875  uintx result = value;
876  SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
877WB_END
878
879WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
880  uint64_t result = value;
881  SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
882WB_END
883
884WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
885  size_t result = value;
886  SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
887WB_END
888
889WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
890  double result = value;
891  SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
892WB_END
893
894WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
895  ThreadToNativeFromVM ttnfv(thread);   // can't be in VM when we call JNI
896  const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
897  ccstr ccstrResult = ccstrValue;
898  bool needFree;
899  {
900    ThreadInVMfromNative ttvfn(thread); // back to VM
901    needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
902  }
903  if (value != NULL) {
904    env->ReleaseStringUTFChars(value, ccstrValue);
905  }
906  if (needFree) {
907    FREE_C_HEAP_ARRAY(char, ccstrResult);
908  }
909WB_END
910
911WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
912  WhiteBox::compilation_locked = true;
913WB_END
914
915WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
916  MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
917  WhiteBox::compilation_locked = false;
918  mo.notify_all();
919WB_END
920
921WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
922  // Force a code cache sweep and block until it finished
923  NMethodSweeper::force_sweep();
924WB_END
925
926WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
927  ResourceMark rm(THREAD);
928  int len;
929  jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
930  return (StringTable::lookup(name, len) != NULL);
931WB_END
932
933WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
934  Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
935  Universe::heap()->collect(GCCause::_last_ditch_collection);
936#if INCLUDE_ALL_GCS
937  if (UseG1GC) {
938    // Needs to be cleared explicitly for G1
939    Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
940  }
941#endif // INCLUDE_ALL_GCS
942WB_END
943
944WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
945  Universe::heap()->collect(GCCause::_wb_young_gc);
946WB_END
947
948WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
949  // static+volatile in order to force the read to happen
950  // (not be eliminated by the compiler)
951  static char c;
952  static volatile char* p;
953
954  p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
955  if (p == NULL) {
956    THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
957  }
958
959  c = *p;
960WB_END
961
962WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
963  const char* cpu_features = VM_Version::cpu_features();
964  ThreadToNativeFromVM ttn(thread);
965  jstring features_string = env->NewStringUTF(cpu_features);
966
967  CHECK_JNI_EXCEPTION_(env, NULL);
968
969  return features_string;
970WB_END
971
972int WhiteBox::get_blob_type(const CodeBlob* code) {
973  guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
974  return CodeCache::get_code_heap(code)->code_blob_type();
975}
976
977CodeHeap* WhiteBox::get_code_heap(int blob_type) {
978  guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
979  return CodeCache::get_code_heap(blob_type);
980}
981
982struct CodeBlobStub {
983  CodeBlobStub(const CodeBlob* blob) :
984      name(os::strdup(blob->name())),
985      size(blob->size()),
986      blob_type(WhiteBox::get_blob_type(blob)) { }
987  ~CodeBlobStub() { os::free((void*) name); }
988  const char* const name;
989  const int         size;
990  const int         blob_type;
991};
992
993static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
994  jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
995  CHECK_JNI_EXCEPTION_(env, NULL);
996  jobjectArray result = env->NewObjectArray(3, clazz, NULL);
997
998  jstring name = env->NewStringUTF(cb->name);
999  CHECK_JNI_EXCEPTION_(env, NULL);
1000  env->SetObjectArrayElement(result, 0, name);
1001
1002  jobject obj = integerBox(thread, env, cb->size);
1003  CHECK_JNI_EXCEPTION_(env, NULL);
1004  env->SetObjectArrayElement(result, 1, obj);
1005
1006  obj = integerBox(thread, env, cb->blob_type);
1007  CHECK_JNI_EXCEPTION_(env, NULL);
1008  env->SetObjectArrayElement(result, 2, obj);
1009
1010  return result;
1011}
1012
1013WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1014  ResourceMark rm(THREAD);
1015  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1016  CHECK_JNI_EXCEPTION_(env, NULL);
1017  methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1018  nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1019  jobjectArray result = NULL;
1020  if (code == NULL) {
1021    return result;
1022  }
1023  int insts_size = code->insts_size();
1024
1025  ThreadToNativeFromVM ttn(thread);
1026  jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1027  CHECK_JNI_EXCEPTION_(env, NULL);
1028  result = env->NewObjectArray(5, clazz, NULL);
1029  if (result == NULL) {
1030    return result;
1031  }
1032
1033  CodeBlobStub stub(code);
1034  jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1035  env->SetObjectArrayElement(result, 0, codeBlob);
1036
1037  jobject level = integerBox(thread, env, code->comp_level());
1038  CHECK_JNI_EXCEPTION_(env, NULL);
1039  env->SetObjectArrayElement(result, 1, level);
1040
1041  jbyteArray insts = env->NewByteArray(insts_size);
1042  CHECK_JNI_EXCEPTION_(env, NULL);
1043  env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1044  env->SetObjectArrayElement(result, 2, insts);
1045
1046  jobject id = integerBox(thread, env, code->compile_id());
1047  CHECK_JNI_EXCEPTION_(env, NULL);
1048  env->SetObjectArrayElement(result, 3, id);
1049
1050  jobject address = longBox(thread, env, (jlong) code);
1051  CHECK_JNI_EXCEPTION_(env, NULL);
1052  env->SetObjectArrayElement(result, 4, address);
1053
1054  return result;
1055WB_END
1056
1057CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1058  guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1059  BufferBlob* blob;
1060  int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1061  if (full_size < size) {
1062    full_size += round_to(size - full_size, oopSize);
1063  }
1064  {
1065    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1066    blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1067    ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1068  }
1069  // Track memory usage statistic after releasing CodeCache_lock
1070  MemoryService::track_code_cache_memory_usage();
1071  return blob;
1072}
1073
1074WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1075  if (size < 0) {
1076    THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1077      err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1078  }
1079  return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1080WB_END
1081
1082WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1083  if (addr == 0) {
1084    return;
1085  }
1086  BufferBlob::free((BufferBlob*) addr);
1087WB_END
1088
1089WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1090  ResourceMark rm;
1091  GrowableArray<CodeBlobStub*> blobs;
1092  {
1093    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1094    CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1095    if (heap == NULL) {
1096      return NULL;
1097    }
1098    for (CodeBlob* cb = (CodeBlob*) heap->first();
1099         cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1100      CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1101      new (stub) CodeBlobStub(cb);
1102      blobs.append(stub);
1103    }
1104  }
1105  if (blobs.length() == 0) {
1106    return NULL;
1107  }
1108  ThreadToNativeFromVM ttn(thread);
1109  jobjectArray result = NULL;
1110  jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1111  CHECK_JNI_EXCEPTION_(env, NULL);
1112  result = env->NewObjectArray(blobs.length(), clazz, NULL);
1113  if (result == NULL) {
1114    return result;
1115  }
1116  int i = 0;
1117  for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1118       it != blobs.end(); ++it) {
1119    jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1120    env->SetObjectArrayElement(result, i, obj);
1121    ++i;
1122  }
1123  return result;
1124WB_END
1125
1126WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1127  return CompileBroker::get_compilation_activity_mode();
1128WB_END
1129
1130WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1131  if (addr == 0) {
1132    THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1133      "WB_GetCodeBlob: addr is null");
1134  }
1135  ThreadToNativeFromVM ttn(thread);
1136  CodeBlobStub stub((CodeBlob*) addr);
1137  return codeBlob2objectArray(thread, env, &stub);
1138WB_END
1139
1140WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1141  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1142  CHECK_JNI_EXCEPTION_(env, 0);
1143  methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1144  return (jlong) mh->method_data();
1145WB_END
1146
1147WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1148  return (jlong) Thread::current()->stack_size();
1149WB_END
1150
1151WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1152  JavaThread* t = JavaThread::current();
1153  return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
1154WB_END
1155
1156
1157int WhiteBox::array_bytes_to_length(size_t bytes) {
1158  return Array<u1>::bytes_to_length(bytes);
1159}
1160
1161WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1162  if (size < 0) {
1163    THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1164        err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1165  }
1166
1167  oop class_loader_oop = JNIHandles::resolve(class_loader);
1168  ClassLoaderData* cld = class_loader_oop != NULL
1169      ? java_lang_ClassLoader::loader_data(class_loader_oop)
1170      : ClassLoaderData::the_null_class_loader_data();
1171
1172  void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1173
1174  return (jlong)(uintptr_t)metadata;
1175WB_END
1176
1177WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1178  oop class_loader_oop = JNIHandles::resolve(class_loader);
1179  ClassLoaderData* cld = class_loader_oop != NULL
1180      ? java_lang_ClassLoader::loader_data(class_loader_oop)
1181      : ClassLoaderData::the_null_class_loader_data();
1182
1183  MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1184WB_END
1185
1186WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1187  if (inc < 0) {
1188    THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1189        err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1190  }
1191
1192  jlong max_size_t = (jlong) ((size_t) -1);
1193  if (inc > max_size_t) {
1194    THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1195        err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1196  }
1197
1198  size_t new_cap_until_GC = 0;
1199  size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1200  bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1201  if (!success) {
1202    THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1203                "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1204                "due to contention with another thread");
1205  }
1206  return (jlong) new_cap_until_GC;
1207WB_END
1208
1209WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1210  return (jlong) MetaspaceGC::capacity_until_GC();
1211WB_END
1212
1213
1214
1215WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1216  Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1217                                           Monitor::_safepoint_check_always :
1218                                           Monitor::_safepoint_check_never;
1219  MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1220                   attemptedNoSafepointValue == JNI_TRUE);
1221WB_END
1222
1223WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1224  oop obj_oop = JNIHandles::resolve(obj);
1225  return (jboolean) obj_oop->mark()->has_monitor();
1226WB_END
1227
1228WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1229  VM_ForceSafepoint force_safepoint_op;
1230  VMThread::execute(&force_safepoint_op);
1231WB_END
1232
1233WB_ENTRY(long, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1234  instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1235  return (long) ikh->constants();
1236WB_END
1237
1238template <typename T>
1239static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1240  assert(value != NULL, "sanity");
1241  if (method == NULL || name == NULL) {
1242    return false;
1243  }
1244  jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1245  CHECK_JNI_EXCEPTION_(env, false);
1246  methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1247  // can't be in VM when we call JNI
1248  ThreadToNativeFromVM ttnfv(thread);
1249  const char* flag_name = env->GetStringUTFChars(name, NULL);
1250  bool result =  CompilerOracle::has_option_value(mh, flag_name, *value);
1251  env->ReleaseStringUTFChars(name, flag_name);
1252  return result;
1253}
1254
1255WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1256  bool result;
1257  if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1258    // can't be in VM when we call JNI
1259    ThreadToNativeFromVM ttnfv(thread);
1260    return booleanBox(thread, env, result);
1261  }
1262  return NULL;
1263WB_END
1264
1265WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1266  intx result;
1267  if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1268    // can't be in VM when we call JNI
1269    ThreadToNativeFromVM ttnfv(thread);
1270    return longBox(thread, env, result);
1271  }
1272  return NULL;
1273WB_END
1274
1275WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1276  uintx result;
1277  if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1278    // can't be in VM when we call JNI
1279    ThreadToNativeFromVM ttnfv(thread);
1280    return longBox(thread, env, result);
1281  }
1282  return NULL;
1283WB_END
1284
1285WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1286  double result;
1287  if (GetMethodOption <double> (thread, env, method, name, &result)) {
1288    // can't be in VM when we call JNI
1289    ThreadToNativeFromVM ttnfv(thread);
1290    return doubleBox(thread, env, result);
1291  }
1292  return NULL;
1293WB_END
1294
1295WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1296  ccstr ccstrResult;
1297  if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1298    // can't be in VM when we call JNI
1299    ThreadToNativeFromVM ttnfv(thread);
1300    jstring result = env->NewStringUTF(ccstrResult);
1301    CHECK_JNI_EXCEPTION_(env, NULL);
1302    return result;
1303  }
1304  return NULL;
1305WB_END
1306
1307WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1308  oop obj_oop = JNIHandles::resolve(obj);
1309  return MetaspaceShared::is_in_shared_space((void*)obj_oop);
1310WB_END
1311
1312WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1313  return StringTable::shared_string_ignored();
1314WB_END
1315
1316//Some convenience methods to deal with objects from java
1317int WhiteBox::offset_for_field(const char* field_name, oop object,
1318    Symbol* signature_symbol) {
1319  assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1320  Thread* THREAD = Thread::current();
1321
1322  //Get the class of our object
1323  Klass* arg_klass = object->klass();
1324  //Turn it into an instance-klass
1325  InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1326
1327  //Create symbols to look for in the class
1328  TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1329      THREAD);
1330
1331  //To be filled in with an offset of the field we're looking for
1332  fieldDescriptor fd;
1333
1334  Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1335  if (res == NULL) {
1336    tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1337        name_symbol->as_C_string());
1338    vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
1339  }
1340
1341  //fetch the field at the offset we've found
1342  int dest_offset = fd.offset();
1343
1344  return dest_offset;
1345}
1346
1347
1348const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1349  int offset = offset_for_field(field_name, object,
1350      vmSymbols::string_signature());
1351  oop string = object->obj_field(offset);
1352  if (string == NULL) {
1353    return NULL;
1354  }
1355  const char* ret = java_lang_String::as_utf8_string(string);
1356  return ret;
1357}
1358
1359bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1360  int offset =
1361      offset_for_field(field_name, object, vmSymbols::bool_signature());
1362  bool ret = (object->bool_field(offset) == JNI_TRUE);
1363  return ret;
1364}
1365
1366void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1367  ResourceMark rm;
1368  ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1369
1370  //  one by one registration natives for exception catching
1371  jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1372  CHECK_JNI_EXCEPTION(env);
1373  for (int i = 0, n = method_count; i < n; ++i) {
1374    // Skip dummy entries
1375    if (method_array[i].fnPtr == NULL) continue;
1376    if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1377      jthrowable throwable_obj = env->ExceptionOccurred();
1378      if (throwable_obj != NULL) {
1379        env->ExceptionClear();
1380        if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1381          // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1382          // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1383          tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1384              method_array[i].name, method_array[i].signature);
1385        }
1386      } else {
1387        // Registration failed unexpectedly.
1388        tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1389            method_array[i].name, method_array[i].signature);
1390        env->UnregisterNatives(wbclass);
1391        break;
1392      }
1393    }
1394  }
1395}
1396
1397#define CC (char*)
1398
1399static JNINativeMethod methods[] = {
1400  {CC"getObjectAddress0",                CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
1401  {CC"getObjectSize0",                   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
1402  {CC"isObjectInOldGen0",                CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
1403  {CC"getHeapOopSize",                   CC"()I",                   (void*)&WB_GetHeapOopSize    },
1404  {CC"getVMPageSize",                    CC"()I",                   (void*)&WB_GetVMPageSize     },
1405  {CC"getVMAllocationGranularity",       CC"()J",                   (void*)&WB_GetVMAllocationGranularity },
1406  {CC"getVMLargePageSize",               CC"()J",                   (void*)&WB_GetVMLargePageSize},
1407  {CC"getHeapSpaceAlignment",            CC"()J",                   (void*)&WB_GetHeapSpaceAlignment},
1408  {CC"isClassAlive0",                    CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
1409  {CC"parseCommandLine0",
1410      CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1411      (void*) &WB_ParseCommandLine
1412  },
1413  {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1414                                                      (void*)&WB_AddToBootstrapClassLoaderSearch},
1415  {CC"addToSystemClassLoaderSearch0",    CC"(Ljava/lang/String;)V",
1416                                                      (void*)&WB_AddToSystemClassLoaderSearch},
1417  {CC"getCompressedOopsMaxHeapSize", CC"()J",
1418      (void*)&WB_GetCompressedOopsMaxHeapSize},
1419  {CC"printHeapSizes",     CC"()V",                   (void*)&WB_PrintHeapSizes    },
1420  {CC"runMemoryUnitTests", CC"()V",                   (void*)&WB_RunMemoryUnitTests},
1421  {CC"readFromNoaccessArea",CC"()V",                  (void*)&WB_ReadFromNoaccessArea},
1422  {CC"stressVirtualSpaceResize",CC"(JJJ)I",           (void*)&WB_StressVirtualSpaceResize},
1423#if INCLUDE_ALL_GCS
1424  {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
1425  {CC"g1IsHumongous0",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
1426  {CC"g1NumMaxRegions",    CC"()J",                   (void*)&WB_G1NumMaxRegions  },
1427  {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
1428  {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
1429  {CC"g1StartConcMarkCycle",       CC"()Z",           (void*)&WB_G1StartMarkCycle  },
1430  {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1431                                                      (void*)&WB_G1AuxiliaryMemoryUsage  },
1432  {CC"psVirtualSpaceAlignment",CC"()J",               (void*)&WB_PSVirtualSpaceAlignment},
1433  {CC"psHeapGenerationAlignment",CC"()J",             (void*)&WB_PSHeapGenerationAlignment},
1434#endif // INCLUDE_ALL_GCS
1435#if INCLUDE_NMT
1436  {CC"NMTMalloc",           CC"(J)J",                 (void*)&WB_NMTMalloc          },
1437  {CC"NMTMallocWithPseudoStack", CC"(JI)J",           (void*)&WB_NMTMallocWithPseudoStack},
1438  {CC"NMTFree",             CC"(J)V",                 (void*)&WB_NMTFree            },
1439  {CC"NMTReserveMemory",    CC"(J)J",                 (void*)&WB_NMTReserveMemory   },
1440  {CC"NMTCommitMemory",     CC"(JJ)V",                (void*)&WB_NMTCommitMemory    },
1441  {CC"NMTUncommitMemory",   CC"(JJ)V",                (void*)&WB_NMTUncommitMemory  },
1442  {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
1443  {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
1444  {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
1445#endif // INCLUDE_NMT
1446  {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
1447  {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
1448    {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
1449                                                        (void*)&WB_DeoptimizeMethod  },
1450  {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
1451                                                      (void*)&WB_IsMethodCompiled  },
1452  {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1453                                                      (void*)&WB_IsMethodCompilable},
1454  {CC"isMethodQueuedForCompilation0",
1455      CC"(Ljava/lang/reflect/Executable;)Z",          (void*)&WB_IsMethodQueuedForCompilation},
1456  {CC"isIntrinsicAvailable0",
1457      CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1458                                                      (void*)&WB_IsIntrinsicAvailable},
1459  {CC"makeMethodNotCompilable0",
1460      CC"(Ljava/lang/reflect/Executable;IZ)V",        (void*)&WB_MakeMethodNotCompilable},
1461  {CC"testSetDontInlineMethod0",
1462      CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetDontInlineMethod},
1463  {CC"getMethodCompilationLevel0",
1464      CC"(Ljava/lang/reflect/Executable;Z)I",         (void*)&WB_GetMethodCompilationLevel},
1465  {CC"getMethodEntryBci0",
1466      CC"(Ljava/lang/reflect/Executable;)I",          (void*)&WB_GetMethodEntryBci},
1467  {CC"getCompileQueueSize",
1468      CC"(I)I",                                       (void*)&WB_GetCompileQueueSize},
1469  {CC"testSetForceInlineMethod0",
1470      CC"(Ljava/lang/reflect/Executable;Z)Z",         (void*)&WB_TestSetForceInlineMethod},
1471  {CC"enqueueMethodForCompilation0",
1472      CC"(Ljava/lang/reflect/Executable;II)Z",        (void*)&WB_EnqueueMethodForCompilation},
1473  {CC"clearMethodState0",
1474      CC"(Ljava/lang/reflect/Executable;)V",          (void*)&WB_ClearMethodState},
1475  {CC"lockCompilation",    CC"()V",                   (void*)&WB_LockCompilation},
1476  {CC"unlockCompilation",  CC"()V",                   (void*)&WB_UnlockCompilation},
1477  {CC"matchesMethod",
1478      CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1479                                                      (void*)&WB_MatchesMethod},
1480  {CC"isConstantVMFlag",   CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1481  {CC"isLockedVMFlag",     CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1482  {CC"setBooleanVMFlag",   CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1483  {CC"setIntVMFlag",       CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1484  {CC"setUintVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1485  {CC"setIntxVMFlag",      CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1486  {CC"setUintxVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1487  {CC"setUint64VMFlag",    CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1488  {CC"setSizeTVMFlag",     CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1489  {CC"setDoubleVMFlag",    CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1490  {CC"setStringVMFlag",    CC"(Ljava/lang/String;Ljava/lang/String;)V",
1491                                                      (void*)&WB_SetStringVMFlag},
1492  {CC"getBooleanVMFlag",   CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1493                                                      (void*)&WB_GetBooleanVMFlag},
1494  {CC"getIntVMFlag",       CC"(Ljava/lang/String;)Ljava/lang/Long;",
1495                                                      (void*)&WB_GetIntVMFlag},
1496  {CC"getUintVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1497                                                      (void*)&WB_GetUintVMFlag},
1498  {CC"getIntxVMFlag",      CC"(Ljava/lang/String;)Ljava/lang/Long;",
1499                                                      (void*)&WB_GetIntxVMFlag},
1500  {CC"getUintxVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1501                                                      (void*)&WB_GetUintxVMFlag},
1502  {CC"getUint64VMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Long;",
1503                                                      (void*)&WB_GetUint64VMFlag},
1504  {CC"getSizeTVMFlag",     CC"(Ljava/lang/String;)Ljava/lang/Long;",
1505                                                      (void*)&WB_GetSizeTVMFlag},
1506  {CC"getDoubleVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/Double;",
1507                                                      (void*)&WB_GetDoubleVMFlag},
1508  {CC"getStringVMFlag",    CC"(Ljava/lang/String;)Ljava/lang/String;",
1509                                                      (void*)&WB_GetStringVMFlag},
1510  {CC"isInStringTable",    CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable  },
1511  {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
1512  {CC"youngGC",  CC"()V",                             (void*)&WB_YoungGC },
1513  {CC"readReservedMemory", CC"()V",                   (void*)&WB_ReadReservedMemory },
1514  {CC"allocateMetaspace",
1515     CC"(Ljava/lang/ClassLoader;J)J",                 (void*)&WB_AllocateMetaspace },
1516  {CC"freeMetaspace",
1517     CC"(Ljava/lang/ClassLoader;JJ)V",                (void*)&WB_FreeMetaspace },
1518  {CC"incMetaspaceCapacityUntilGC", CC"(J)J",         (void*)&WB_IncMetaspaceCapacityUntilGC },
1519  {CC"metaspaceCapacityUntilGC", CC"()J",             (void*)&WB_MetaspaceCapacityUntilGC },
1520  {CC"getCPUFeatures",     CC"()Ljava/lang/String;",  (void*)&WB_GetCPUFeatures     },
1521  {CC"getNMethod0",         CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1522                                                      (void*)&WB_GetNMethod         },
1523  {CC"forceNMethodSweep",  CC"()V",                   (void*)&WB_ForceNMethodSweep  },
1524  {CC"allocateCodeBlob",   CC"(II)J",                 (void*)&WB_AllocateCodeBlob   },
1525  {CC"freeCodeBlob",       CC"(J)V",                  (void*)&WB_FreeCodeBlob       },
1526  {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1527  {CC"getCompilationActivityMode",
1528                           CC"()I",                   (void*)&WB_GetCompilationActivityMode},
1529  {CC"getMethodData0",     CC"(Ljava/lang/reflect/Executable;)J",
1530                                                      (void*)&WB_GetMethodData      },
1531  {CC"getCodeBlob",        CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob        },
1532  {CC"getThreadStackSize", CC"()J",                   (void*)&WB_GetThreadStackSize },
1533  {CC"getThreadRemainingStackSize", CC"()J",          (void*)&WB_GetThreadRemainingStackSize },
1534  {CC"assertMatchingSafepointCalls", CC"(ZZ)V",       (void*)&WB_AssertMatchingSafepointCalls },
1535  {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated  },
1536  {CC"forceSafepoint",     CC"()V",                   (void*)&WB_ForceSafepoint     },
1537  {CC"getConstantPool0",   CC"(Ljava/lang/Class;)J",  (void*)&WB_GetConstantPool    },
1538  {CC"getMethodBooleanOption",
1539      CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1540                                                      (void*)&WB_GetMethodBooleaneOption},
1541  {CC"getMethodIntxOption",
1542      CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1543                                                      (void*)&WB_GetMethodIntxOption},
1544  {CC"getMethodUintxOption",
1545      CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1546                                                      (void*)&WB_GetMethodUintxOption},
1547  {CC"getMethodDoubleOption",
1548      CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1549                                                      (void*)&WB_GetMethodDoubleOption},
1550  {CC"getMethodStringOption",
1551      CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1552                                                      (void*)&WB_GetMethodStringOption},
1553  {CC"isShared",           CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
1554  {CC"areSharedStringsIgnored",           CC"()Z",    (void*)&WB_AreSharedStringsIgnored },
1555};
1556
1557#undef CC
1558
1559JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1560  {
1561    if (WhiteBoxAPI) {
1562      // Make sure that wbclass is loaded by the null classloader
1563      instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1564      Handle loader(ikh->class_loader());
1565      if (loader.is_null()) {
1566        WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1567        WhiteBox::register_extended(env, wbclass, thread);
1568        WhiteBox::set_used();
1569      }
1570    }
1571  }
1572JVM_END
1573