1 /*
2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26
27 #include "code/codeCache.hpp"
28 #include "memory/metadataFactory.hpp"
29 #include "memory/universe.hpp"
30 #include "oops/oop.inline.hpp"
31
32 #include "classfile/stringTable.hpp"
33 #include "classfile/classLoaderData.hpp"
34
35 #include "prims/whitebox.hpp"
36 #include "prims/wbtestmethods/parserTests.hpp"
37
38 #include "runtime/thread.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/interfaceSupport.hpp"
41 #include "runtime/os.hpp"
42 #include "runtime/vm_version.hpp"
43
44 #include "utilities/array.hpp"
45 #include "utilities/debug.hpp"
46 #include "utilities/macros.hpp"
47 #include "utilities/exceptions.hpp"
48
49 #if INCLUDE_ALL_GCS
50 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
51 #include "gc_implementation/g1/concurrentMark.hpp"
52 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
53 #include "gc_implementation/g1/heapRegionRemSet.hpp"
54 #endif // INCLUDE_ALL_GCS
55
56 #if INCLUDE_NMT
57 #include "services/mallocSiteTable.hpp"
58 #include "services/memTracker.hpp"
59 #include "utilities/nativeCallStack.hpp"
60 #endif // INCLUDE_NMT
61
62 #include "compiler/compileBroker.hpp"
63 #include "runtime/compilationPolicy.hpp"
64
65 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
66
67 #define SIZE_T_MAX_VALUE ((size_t) -1)
68
69 bool WhiteBox::_used = false;
70
71 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
72 return (jlong)(void*)JNIHandles::resolve(obj);
73 WB_END
74
75 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
76 return heapOopSize;
77 WB_END
78
79
80 class WBIsKlassAliveClosure : public KlassClosure {
81 Symbol* _name;
82 bool _found;
83 public:
84 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
85
86 void do_klass(Klass* k) {
87 if (_found) return;
88 Symbol* ksym = k->name();
89 if (ksym->fast_compare(_name) == 0) {
90 _found = true;
91 }
92 }
93
94 bool found() const {
95 return _found;
96 }
97 };
98
99 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
100 Handle h_name = JNIHandles::resolve(name);
101 if (h_name.is_null()) return false;
102 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
103 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
104
105 WBIsKlassAliveClosure closure(sym);
106 ClassLoaderDataGraph::classes_do(&closure);
107
108 return closure.found();
109 WB_END
110
111 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
112 return (jlong)Arguments::max_heap_for_compressed_oops();
113 }
114 WB_END
115
116 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
117 CollectorPolicy * p = Universe::heap()->collector_policy();
118 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
119 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
120 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
121 p->space_alignment(), p->heap_alignment());
122 }
123 WB_END
124
125 #ifndef PRODUCT
126 // Forward declaration
127 void TestReservedSpace_test();
128 void TestReserveMemorySpecial_test();
129 void TestVirtualSpace_test();
130 void TestMetaspaceAux_test();
131 #endif
132
133 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
134 #ifndef PRODUCT
135 TestReservedSpace_test();
136 TestReserveMemorySpecial_test();
137 TestVirtualSpace_test();
138 TestMetaspaceAux_test();
139 #endif
140 WB_END
141
142 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
143 size_t granularity = os::vm_allocation_granularity();
144 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
145 VirtualSpace vs;
146 vs.initialize(rhs, 50 * granularity);
147
148 //Check if constraints are complied
149 if (!( UseCompressedOops && rhs.base() != NULL &&
150 Universe::narrow_oop_base() != NULL &&
151 Universe::narrow_oop_use_implicit_null_checks() )) {
152 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
153 "\tUseCompressedOops is %d\n"
154 "\trhs.base() is "PTR_FORMAT"\n"
155 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
156 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
157 UseCompressedOops,
158 rhs.base(),
159 Universe::narrow_oop_base(),
160 Universe::narrow_oop_use_implicit_null_checks());
161 return;
162 }
163 tty->print_cr("Reading from no access area... ");
164 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
165 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
166 WB_END
167
168 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
169 size_t magnitude, size_t iterations) {
170 size_t granularity = os::vm_allocation_granularity();
171 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
172 VirtualSpace vs;
173 if (!vs.initialize(rhs, 0)) {
174 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
175 return 3;
176 }
177
178 long seed = os::random();
179 tty->print_cr("Random seed is %ld", seed);
180 os::init_random(seed);
181
182 for (size_t i = 0; i < iterations; i++) {
183
184 // Whether we will shrink or grow
185 bool shrink = os::random() % 2L == 0;
186
187 // Get random delta to resize virtual space
188 size_t delta = (size_t)os::random() % magnitude;
189
190 // If we are about to shrink virtual space below zero, then expand instead
191 if (shrink && vs.committed_size() < delta) {
192 shrink = false;
193 }
194
195 // Resizing by delta
196 if (shrink) {
197 vs.shrink_by(delta);
198 } else {
199 // If expanding fails expand_by will silently return false
200 vs.expand_by(delta, true);
201 }
202 }
203 return 0;
204 }
205
206 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
207 jlong reserved_space_size, jlong magnitude, jlong iterations))
208 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
209 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
210 iterations);
211 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
212 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
213 return 1;
214 }
215
216 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
217 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
218 if (sizeof(size_t) < sizeof(jlong)) {
219 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
220 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
221 || iterations > size_t_max_value) {
222 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
223 return 2;
224 }
225 }
226
227 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
228 (size_t) magnitude, (size_t) iterations);
229 WB_END
230
231 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
232 oop p = JNIHandles::resolve(obj);
233 #if INCLUDE_ALL_GCS
234 if (UseG1GC) {
235 G1CollectedHeap* g1 = G1CollectedHeap::heap();
236 const HeapRegion* hr = g1->heap_region_containing(p);
237 if (hr == NULL) {
238 return false;
239 }
240 return !(hr->is_young());
241 } else if (UseParallelGC) {
242 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
243 return !psh->is_in_young(p);
244 }
245 #endif // INCLUDE_ALL_GCS
246 GenCollectedHeap* gch = GenCollectedHeap::heap();
247 return !gch->is_in_young(p);
248 WB_END
249
250 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
251 oop p = JNIHandles::resolve(obj);
252 return p->size() * HeapWordSize;
253 WB_END
254
255 #if INCLUDE_ALL_GCS
256 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
257 G1CollectedHeap* g1 = G1CollectedHeap::heap();
258 oop result = JNIHandles::resolve(obj);
259 const HeapRegion* hr = g1->heap_region_containing(result);
260 return hr->is_humongous();
261 WB_END
262
263 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
264 G1CollectedHeap* g1 = G1CollectedHeap::heap();
265 size_t nr = g1->num_free_regions();
266 return (jlong)nr;
267 WB_END
268
269 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
270 G1CollectedHeap* g1 = G1CollectedHeap::heap();
271 ConcurrentMark* cm = g1->concurrent_mark();
272 return cm->concurrent_marking_in_progress();
273 WB_END
274
275 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
276 return (jint)HeapRegion::GrainBytes;
277 WB_END
278 #endif // INCLUDE_ALL_GCS
279
280 #if INCLUDE_NMT
281 // Alloc memory using the test memory type so that we can use that to see if
282 // NMT picks it up correctly
283 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
284 jlong addr = 0;
285 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
286 return addr;
287 WB_END
288
289 // Alloc memory with pseudo call stack. The test can create psudo malloc
290 // allocation site to stress the malloc tracking.
291 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
292 address pc = (address)(size_t)pseudo_stack;
293 NativeCallStack stack(&pc, 1);
294 return (jlong)os::malloc(size, mtTest, stack);
295 WB_END
296
297 // Free the memory allocated by NMTAllocTest
298 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
299 os::free((void*)(uintptr_t)mem, mtTest);
300 WB_END
301
302 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
303 jlong addr = 0;
304
305 addr = (jlong)(uintptr_t)os::reserve_memory(size);
306 MemTracker::record_virtual_memory_type((address)addr, mtTest);
307
308 return addr;
309 WB_END
310
311
312 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
313 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
314 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
315 WB_END
316
317 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
318 os::uncommit_memory((char *)(uintptr_t)addr, size);
319 WB_END
320
321 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
322 os::release_memory((char *)(uintptr_t)addr, size);
323 WB_END
324
325 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
326 return MemTracker::tracking_level() == NMT_detail;
327 WB_END
328
329 WB_ENTRY(void, WB_NMTOverflowHashBucket(JNIEnv* env, jobject o, jlong num))
330 address pc = (address)1;
331 for (jlong index = 0; index < num; index ++) {
332 NativeCallStack stack(&pc, 1);
333 os::malloc(0, mtTest, stack);
334 pc += MallocSiteTable::hash_buckets();
335 }
336 WB_END
337
338
339 #endif // INCLUDE_NMT
340
341 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
342 assert(method != NULL, "method should not be null");
343 ThreadToNativeFromVM ttn(thread);
344 return env->FromReflectedMethod(method);
345 }
346
347 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
348 MutexLockerEx mu(Compile_lock);
349 CodeCache::mark_all_nmethods_for_deoptimization();
350 VM_Deoptimize op;
351 VMThread::execute(&op);
352 WB_END
353
354 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
355 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
356 int result = 0;
357 CHECK_JNI_EXCEPTION_(env, result);
358 MutexLockerEx mu(Compile_lock);
359 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
360 nmethod* code;
361 if (is_osr) {
362 int bci = InvocationEntryBci;
363 while ((code = mh->lookup_osr_nmethod_for(bci, CompLevel_none, false)) != NULL) {
364 code->mark_for_deoptimization();
365 ++result;
366 bci = code->osr_entry_bci() + 1;
367 }
368 } else {
369 code = mh->code();
370 }
371 if (code != NULL) {
372 code->mark_for_deoptimization();
373 ++result;
374 }
375 result += CodeCache::mark_for_deoptimization(mh());
376 if (result > 0) {
377 VM_Deoptimize op;
378 VMThread::execute(&op);
379 }
380 return result;
381 WB_END
382
383 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
384 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
385 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
386 MutexLockerEx mu(Compile_lock);
387 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
388 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
389 if (code == NULL) {
390 return JNI_FALSE;
391 }
392 return (code->is_alive() && !code->is_marked_for_deoptimization());
393 WB_END
394
395 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
396 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
397 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
398 MutexLockerEx mu(Compile_lock);
399 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
400 if (is_osr) {
401 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
402 } else {
403 return CompilationPolicy::can_be_compiled(mh, comp_level);
404 }
405 WB_END
406
407 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
408 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
409 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
410 MutexLockerEx mu(Compile_lock);
411 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
412 return mh->queued_for_compilation();
413 WB_END
414
415 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
416 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
417 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
418 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
419 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
420 return (code != NULL ? code->comp_level() : CompLevel_none);
421 WB_END
422
423 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
424 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
425 CHECK_JNI_EXCEPTION(env);
426 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
427 if (is_osr) {
428 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
429 } else {
430 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
431 }
432 WB_END
433
434 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
435 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
436 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
437 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
438 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
439 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
440 WB_END
441
442 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
443 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
444 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
445 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
446 bool result = mh->dont_inline();
447 mh->set_dont_inline(value == JNI_TRUE);
448 return result;
449 WB_END
450
451 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
452 if (comp_level == CompLevel_any) {
453 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
454 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
455 } else {
456 return CompileBroker::queue_size(comp_level);
457 }
458 WB_END
459
460 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
461 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
462 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
463 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
464 bool result = mh->force_inline();
465 mh->set_force_inline(value == JNI_TRUE);
466 return result;
467 WB_END
468
469 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
470 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
471 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
472 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
473 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
474 MutexLockerEx mu(Compile_lock);
475 return (mh->queued_for_compilation() || nm != NULL);
476 WB_END
477
478 class VM_WhiteBoxOperation : public VM_Operation {
479 public:
480 VM_WhiteBoxOperation() { }
481 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
482 bool allow_nested_vm_operations() const { return true; }
483 };
484
485 class AlwaysFalseClosure : public BoolObjectClosure {
486 public:
487 bool do_object_b(oop p) { return false; }
488 };
489
490 static AlwaysFalseClosure always_false;
491
492 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation {
493 public:
494 VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { }
495 void doit() {
496 _mdo->clean_method_data(&always_false);
497 }
498 private:
499 MethodData* _mdo;
500 };
501
502 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
503 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
504 CHECK_JNI_EXCEPTION(env);
505 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
506 MutexLockerEx mu(Compile_lock);
507 MethodData* mdo = mh->method_data();
508 MethodCounters* mcs = mh->method_counters();
509
510 if (mdo != NULL) {
511 mdo->init();
512 ResourceMark rm;
513 int arg_count = mdo->method()->size_of_parameters();
514 for (int i = 0; i < arg_count; i++) {
515 mdo->set_arg_modified(i, 0);
516 }
517 VM_WhiteBoxCleanMethodData op(mdo);
518 VMThread::execute(&op);
519 }
520
521 mh->clear_not_c1_compilable();
522 mh->clear_not_c2_compilable();
523 mh->clear_not_c2_osr_compilable();
524 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
525 if (mcs != NULL) {
526 mcs->backedge_counter()->init();
527 mcs->invocation_counter()->init();
528 mcs->set_interpreter_invocation_count(0);
529 mcs->set_interpreter_throwout_count(0);
530
531 #ifdef TIERED
532 mcs->set_rate(0.0F);
533 mh->set_prev_event_count(0);
534 mh->set_prev_time(0);
535 #endif
536 }
537 WB_END
538
539 template <typename T>
540 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*)) {
541 if (name == NULL) {
542 return false;
543 }
544 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
545 const char* flag_name = env->GetStringUTFChars(name, NULL);
546 bool result = (*TAt)(flag_name, value);
547 env->ReleaseStringUTFChars(name, flag_name);
548 return result;
549 }
550
551 template <typename T>
552 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
553 if (name == NULL) {
554 return false;
555 }
556 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
557 const char* flag_name = env->GetStringUTFChars(name, NULL);
558 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
559 env->ReleaseStringUTFChars(name, flag_name);
560 return result;
561 }
562
563 template <typename T>
564 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
565 ResourceMark rm(thread);
566 jclass clazz = env->FindClass(name->as_C_string());
567 CHECK_JNI_EXCEPTION_(env, NULL);
568 jmethodID methodID = env->GetStaticMethodID(clazz,
569 vmSymbols::valueOf_name()->as_C_string(),
570 sig->as_C_string());
571 CHECK_JNI_EXCEPTION_(env, NULL);
572 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
573 CHECK_JNI_EXCEPTION_(env, NULL);
574 return result;
575 }
576
577 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
578 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
579 }
580 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
581 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
582 }
583 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
584 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
585 }
586 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
587 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
588 }*/
589 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
590 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
591 }
592
593 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
594 bool result;
595 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
596 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
597 return booleanBox(thread, env, result);
598 }
599 return NULL;
600 WB_END
601
602 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
603 intx result;
604 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
605 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
606 return longBox(thread, env, result);
607 }
608 return NULL;
609 WB_END
610
611 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
612 uintx result;
613 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
614 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
615 return longBox(thread, env, result);
616 }
617 return NULL;
618 WB_END
619
620 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
621 uint64_t result;
622 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
623 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
624 return longBox(thread, env, result);
625 }
626 return NULL;
627 WB_END
628
629 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
630 uintx result;
631 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
632 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
633 return longBox(thread, env, result);
634 }
635 return NULL;
636 WB_END
637
638 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
639 double result;
640 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
641 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
642 return doubleBox(thread, env, result);
643 }
644 return NULL;
645 WB_END
646
647 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
648 ccstr ccstrResult;
649 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
650 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
651 jstring result = env->NewStringUTF(ccstrResult);
652 CHECK_JNI_EXCEPTION_(env, NULL);
653 return result;
654 }
655 return NULL;
656 WB_END
657
658 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
659 bool result = value == JNI_TRUE ? true : false;
660 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
661 WB_END
662
663 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
664 intx result = value;
665 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
666 WB_END
667
668 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
669 uintx result = value;
670 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
671 WB_END
672
673 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
674 uint64_t result = value;
675 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
676 WB_END
677
678 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
679 size_t result = value;
680 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
681 WB_END
682
683 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
684 double result = value;
685 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
686 WB_END
687
688 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
689 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
690 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
691 ccstr ccstrResult = ccstrValue;
692 bool needFree;
693 {
694 ThreadInVMfromNative ttvfn(thread); // back to VM
695 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
696 }
697 if (value != NULL) {
698 env->ReleaseStringUTFChars(value, ccstrValue);
699 }
700 if (needFree) {
701 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
702 }
703 WB_END
704
705
706 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
707 ResourceMark rm(THREAD);
708 int len;
709 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
710 return (StringTable::lookup(name, len) != NULL);
711 WB_END
712
713 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
714 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
715 Universe::heap()->collect(GCCause::_last_ditch_collection);
716 #if INCLUDE_ALL_GCS
717 if (UseG1GC) {
718 // Needs to be cleared explicitly for G1
719 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
720 }
721 #endif // INCLUDE_ALL_GCS
722 WB_END
723
724 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
725 Universe::heap()->collect(GCCause::_wb_young_gc);
726 WB_END
727
728 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
729 // static+volatile in order to force the read to happen
730 // (not be eliminated by the compiler)
731 static char c;
732 static volatile char* p;
733
734 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
735 if (p == NULL) {
736 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
737 }
738
739 c = *p;
740 WB_END
741
742 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
743 const char* cpu_features = VM_Version::cpu_features();
744 ThreadToNativeFromVM ttn(thread);
745 jstring features_string = env->NewStringUTF(cpu_features);
746
747 CHECK_JNI_EXCEPTION_(env, NULL);
748
749 return features_string;
750 WB_END
751
752
753 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
754 ResourceMark rm(THREAD);
755 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
756 CHECK_JNI_EXCEPTION_(env, NULL);
757 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
758 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
759 jobjectArray result = NULL;
760 if (code == NULL) {
761 return result;
762 }
763 int insts_size = code->insts_size();
764
765 ThreadToNativeFromVM ttn(thread);
766 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
767 CHECK_JNI_EXCEPTION_(env, NULL);
768 result = env->NewObjectArray(2, clazz, NULL);
769 if (result == NULL) {
770 return result;
771 }
772
773 jobject obj = integerBox(thread, env, code->comp_level());
774 CHECK_JNI_EXCEPTION_(env, NULL);
775 env->SetObjectArrayElement(result, 0, obj);
776
777 jbyteArray insts = env->NewByteArray(insts_size);
778 CHECK_JNI_EXCEPTION_(env, NULL);
779 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
780 env->SetObjectArrayElement(result, 1, insts);
781
782 return result;
783 WB_END
784
785 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
786 return (jlong) Thread::current()->stack_size();
787 WB_END
788
789 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
790 JavaThread* t = JavaThread::current();
791 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
792 WB_END
793
794 int WhiteBox::array_bytes_to_length(size_t bytes) {
795 return Array<u1>::bytes_to_length(bytes);
796 }
797
798 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
799 if (size < 0) {
800 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
801 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
802 }
803
804 oop class_loader_oop = JNIHandles::resolve(class_loader);
805 ClassLoaderData* cld = class_loader_oop != NULL
806 ? java_lang_ClassLoader::loader_data(class_loader_oop)
807 : ClassLoaderData::the_null_class_loader_data();
808
809 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
810
811 return (jlong)(uintptr_t)metadata;
812 WB_END
813
814 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
815 oop class_loader_oop = JNIHandles::resolve(class_loader);
816 ClassLoaderData* cld = class_loader_oop != NULL
817 ? java_lang_ClassLoader::loader_data(class_loader_oop)
818 : ClassLoaderData::the_null_class_loader_data();
819
820 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
821 WB_END
822
823 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong size))
824 if (size < 0) {
825 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
826 err_msg("WB_IncMetaspaceCapacityUntilGC: size is negative: " JLONG_FORMAT, size));
827 }
828
829 if (size > (jlong) ((size_t) -1)) {
830 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
831 err_msg("WB_IncMetaspaceCapacityUntilGC: size does not fit in size_t: " JLONG_FORMAT, size));
832 }
833
834 size_t new_val = MetaspaceGC::inc_capacity_until_GC(align_size_down((size_t) size, Metaspace::commit_alignment()));
835 return (jlong) new_val;
836 WB_END
837
838 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
839 return (jlong) MetaspaceGC::capacity_until_GC();
840 WB_END
841
842 //Some convenience methods to deal with objects from java
843 int WhiteBox::offset_for_field(const char* field_name, oop object,
844 Symbol* signature_symbol) {
845 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
846 Thread* THREAD = Thread::current();
847
848 //Get the class of our object
849 Klass* arg_klass = object->klass();
850 //Turn it into an instance-klass
851 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
852
853 //Create symbols to look for in the class
854 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
855 THREAD);
856
857 //To be filled in with an offset of the field we're looking for
858 fieldDescriptor fd;
859
860 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
861 if (res == NULL) {
862 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
863 name_symbol->as_C_string());
864 fatal("Invalid layout of preloaded class");
865 }
866
867 //fetch the field at the offset we've found
868 int dest_offset = fd.offset();
869
870 return dest_offset;
871 }
872
873
874 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
875 int offset = offset_for_field(field_name, object,
876 vmSymbols::string_signature());
877 oop string = object->obj_field(offset);
878 if (string == NULL) {
879 return NULL;
880 }
881 const char* ret = java_lang_String::as_utf8_string(string);
882 return ret;
883 }
884
885 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
886 int offset =
887 offset_for_field(field_name, object, vmSymbols::bool_signature());
888 bool ret = (object->bool_field(offset) == JNI_TRUE);
889 return ret;
890 }
891
892 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
893 ResourceMark rm;
894 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
895
896 // one by one registration natives for exception catching
897 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
898 CHECK_JNI_EXCEPTION(env);
899 for (int i = 0, n = method_count; i < n; ++i) {
900 // Skip dummy entries
901 if (method_array[i].fnPtr == NULL) continue;
902 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
903 jthrowable throwable_obj = env->ExceptionOccurred();
904 if (throwable_obj != NULL) {
905 env->ExceptionClear();
906 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
907 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
908 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
909 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
910 method_array[i].name, method_array[i].signature);
911 }
912 } else {
913 // Registration failed unexpectedly.
914 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
915 method_array[i].name, method_array[i].signature);
916 env->UnregisterNatives(wbclass);
917 break;
918 }
919 }
920 }
921 }
922
923 #define CC (char*)
924
925 static JNINativeMethod methods[] = {
926 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
927 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
928 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
929 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
930 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
931 {CC"parseCommandLine",
932 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
933 (void*) &WB_ParseCommandLine
934 },
935 {CC"getCompressedOopsMaxHeapSize", CC"()J",
936 (void*)&WB_GetCompressedOopsMaxHeapSize},
937 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
938 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
939 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
940 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
941 #if INCLUDE_ALL_GCS
942 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
943 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
944 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
945 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
946 #endif // INCLUDE_ALL_GCS
947 #if INCLUDE_NMT
948 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
949 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
950 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
951 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
952 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
953 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
954 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
955 {CC"NMTOverflowHashBucket", CC"(J)V", (void*)&WB_NMTOverflowHashBucket},
956 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
957 #endif // INCLUDE_NMT
958 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
959 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
960 (void*)&WB_DeoptimizeMethod },
961 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
962 (void*)&WB_IsMethodCompiled },
963 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
964 (void*)&WB_IsMethodCompilable},
965 {CC"isMethodQueuedForCompilation",
966 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
967 {CC"makeMethodNotCompilable",
968 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
969 {CC"testSetDontInlineMethod",
970 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
971 {CC"getMethodCompilationLevel",
972 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
973 {CC"getMethodEntryBci",
974 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
975 {CC"getCompileQueueSize",
976 CC"(I)I", (void*)&WB_GetCompileQueueSize},
977 {CC"testSetForceInlineMethod",
978 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
979 {CC"enqueueMethodForCompilation",
980 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
981 {CC"clearMethodState",
982 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
983 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
984 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
985 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
986 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
987 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
988 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
989 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
990 (void*)&WB_SetStringVMFlag},
991 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
992 (void*)&WB_GetBooleanVMFlag},
993 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
994 (void*)&WB_GetIntxVMFlag},
995 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
996 (void*)&WB_GetUintxVMFlag},
997 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
998 (void*)&WB_GetUint64VMFlag},
999 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1000 (void*)&WB_GetSizeTVMFlag},
1001 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1002 (void*)&WB_GetDoubleVMFlag},
1003 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1004 (void*)&WB_GetStringVMFlag},
1005 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1006 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1007 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1008 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1009 {CC"allocateMetaspace",
1010 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1011 {CC"freeMetaspace",
1012 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1013 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1014 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1015 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1016 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1017 (void*)&WB_GetNMethod },
1018 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1019 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1020 };
1021
1022 #undef CC
1023
1024 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1025 {
1026 if (WhiteBoxAPI) {
1027 // Make sure that wbclass is loaded by the null classloader
1028 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1029 Handle loader(ikh->class_loader());
1030 if (loader.is_null()) {
1031 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1032 WhiteBox::register_extended(env, wbclass, thread);
1033 WhiteBox::set_used();
1034 }
1035 }
1036 }
1037 JVM_END