1 /*
2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26
27 #include "memory/metadataFactory.hpp"
28 #include "memory/universe.hpp"
29 #include "oops/oop.inline.hpp"
30
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/classLoaderData.hpp"
33
34 #include "prims/whitebox.hpp"
35 #include "prims/wbtestmethods/parserTests.hpp"
36
37 #include "runtime/arguments.hpp"
38 #include "runtime/interfaceSupport.hpp"
39 #include "runtime/os.hpp"
40 #include "utilities/array.hpp"
41 #include "utilities/debug.hpp"
42 #include "utilities/macros.hpp"
43 #include "utilities/exceptions.hpp"
44
45 #if INCLUDE_ALL_GCS
46 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
47 #include "gc_implementation/g1/concurrentMark.hpp"
48 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
49 #include "gc_implementation/g1/heapRegionRemSet.hpp"
50 #endif // INCLUDE_ALL_GCS
51
52 #if INCLUDE_NMT
53 #include "services/mallocSiteTable.hpp"
54 #include "services/memTracker.hpp"
55 #include "utilities/nativeCallStack.hpp"
56 #endif // INCLUDE_NMT
57
58 #include "compiler/compileBroker.hpp"
59 #include "runtime/compilationPolicy.hpp"
60
61 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
62
63 #define SIZE_T_MAX_VALUE ((size_t) -1)
64
65 bool WhiteBox::_used = false;
66
67 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
68 return (jlong)(void*)JNIHandles::resolve(obj);
69 WB_END
70
71 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
72 return heapOopSize;
73 WB_END
74
75
76 class WBIsKlassAliveClosure : public KlassClosure {
77 Symbol* _name;
78 bool _found;
79 public:
80 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
81
82 void do_klass(Klass* k) {
83 if (_found) return;
84 Symbol* ksym = k->name();
85 if (ksym->fast_compare(_name) == 0) {
86 _found = true;
87 }
88 }
89
90 bool found() const {
91 return _found;
92 }
93 };
94
95 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
96 Handle h_name = JNIHandles::resolve(name);
97 if (h_name.is_null()) return false;
98 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
99 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
100
101 WBIsKlassAliveClosure closure(sym);
102 ClassLoaderDataGraph::classes_do(&closure);
103
104 return closure.found();
105 WB_END
106
107 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
108 return (jlong)Arguments::max_heap_for_compressed_oops();
109 }
110 WB_END
111
112 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
113 CollectorPolicy * p = Universe::heap()->collector_policy();
114 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
115 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Min alignment "SIZE_FORMAT" Max alignment "SIZE_FORMAT,
116 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
117 p->space_alignment(), p->heap_alignment());
118 }
119 WB_END
120
121 #ifndef PRODUCT
122 // Forward declaration
123 void TestReservedSpace_test();
124 void TestReserveMemorySpecial_test();
125 void TestVirtualSpace_test();
126 void TestMetaspaceAux_test();
127 #endif
128
129 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
130 #ifndef PRODUCT
131 TestReservedSpace_test();
132 TestReserveMemorySpecial_test();
133 TestVirtualSpace_test();
134 TestMetaspaceAux_test();
135 #endif
136 WB_END
137
138 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
139 size_t granularity = os::vm_allocation_granularity();
140 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
141 VirtualSpace vs;
142 vs.initialize(rhs, 50 * granularity);
143
144 //Check if constraints are complied
145 if (!( UseCompressedOops && rhs.base() != NULL &&
146 Universe::narrow_oop_base() != NULL &&
147 Universe::narrow_oop_use_implicit_null_checks() )) {
148 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
149 "\tUseCompressedOops is %d\n"
150 "\trhs.base() is "PTR_FORMAT"\n"
151 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
152 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
153 UseCompressedOops,
154 rhs.base(),
155 Universe::narrow_oop_base(),
156 Universe::narrow_oop_use_implicit_null_checks());
157 return;
158 }
159 tty->print_cr("Reading from no access area... ");
160 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
161 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
162 WB_END
163
164 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
165 size_t magnitude, size_t iterations) {
166 size_t granularity = os::vm_allocation_granularity();
167 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
168 VirtualSpace vs;
169 if (!vs.initialize(rhs, 0)) {
170 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
171 return 3;
172 }
173
174 long seed = os::random();
175 tty->print_cr("Random seed is %ld", seed);
176 os::init_random(seed);
177
178 for (size_t i = 0; i < iterations; i++) {
179
180 // Whether we will shrink or grow
181 bool shrink = os::random() % 2L == 0;
182
183 // Get random delta to resize virtual space
184 size_t delta = (size_t)os::random() % magnitude;
185
186 // If we are about to shrink virtual space below zero, then expand instead
187 if (shrink && vs.committed_size() < delta) {
188 shrink = false;
189 }
190
191 // Resizing by delta
192 if (shrink) {
193 vs.shrink_by(delta);
194 } else {
195 // If expanding fails expand_by will silently return false
196 vs.expand_by(delta, true);
197 }
198 }
199 return 0;
200 }
201
202 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
203 jlong reserved_space_size, jlong magnitude, jlong iterations))
204 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
205 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
206 iterations);
207 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
208 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
209 return 1;
210 }
211
212 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
213 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
214 if (sizeof(size_t) < sizeof(jlong)) {
215 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
216 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
217 || iterations > size_t_max_value) {
218 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
219 return 2;
220 }
221 }
222
223 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
224 (size_t) magnitude, (size_t) iterations);
225 WB_END
226
227 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
228 oop p = JNIHandles::resolve(obj);
229 #if INCLUDE_ALL_GCS
230 if (UseG1GC) {
231 G1CollectedHeap* g1 = G1CollectedHeap::heap();
232 const HeapRegion* hr = g1->heap_region_containing(p);
233 if (hr == NULL) {
234 return false;
235 }
236 return !(hr->is_young());
237 } else if (UseParallelGC) {
238 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
239 return !psh->is_in_young(p);
240 }
241 #endif // INCLUDE_ALL_GCS
242 GenCollectedHeap* gch = GenCollectedHeap::heap();
243 return !gch->is_in_young(p);
244 WB_END
245
246 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
247 oop p = JNIHandles::resolve(obj);
248 return p->size() * HeapWordSize;
249 WB_END
250
251 #if INCLUDE_ALL_GCS
252 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
253 G1CollectedHeap* g1 = G1CollectedHeap::heap();
254 oop result = JNIHandles::resolve(obj);
255 const HeapRegion* hr = g1->heap_region_containing(result);
256 return hr->isHumongous();
257 WB_END
258
259 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
260 G1CollectedHeap* g1 = G1CollectedHeap::heap();
261 size_t nr = g1->num_free_regions();
262 return (jlong)nr;
263 WB_END
264
265 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
266 G1CollectedHeap* g1 = G1CollectedHeap::heap();
267 ConcurrentMark* cm = g1->concurrent_mark();
268 return cm->concurrent_marking_in_progress();
269 WB_END
270
271 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
272 return (jint)HeapRegion::GrainBytes;
273 WB_END
274 #endif // INCLUDE_ALL_GCS
275
276 #if INCLUDE_NMT
277 // Alloc memory using the test memory type so that we can use that to see if
278 // NMT picks it up correctly
279 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
280 jlong addr = 0;
281 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
282 return addr;
283 WB_END
284
285 // Alloc memory with pseudo call stack. The test can create psudo malloc
286 // allocation site to stress the malloc tracking.
287 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
288 address pc = (address)(size_t)pseudo_stack;
289 NativeCallStack stack(&pc, 1);
290 return (jlong)os::malloc(size, mtTest, stack);
291 WB_END
292
293 // Free the memory allocated by NMTAllocTest
294 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
295 os::free((void*)(uintptr_t)mem, mtTest);
296 WB_END
297
298 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
299 jlong addr = 0;
300
301 addr = (jlong)(uintptr_t)os::reserve_memory(size);
302 MemTracker::record_virtual_memory_type((address)addr, mtTest);
303
304 return addr;
305 WB_END
306
307
308 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
309 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
310 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
311 WB_END
312
313 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
314 os::uncommit_memory((char *)(uintptr_t)addr, size);
315 WB_END
316
317 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
318 os::release_memory((char *)(uintptr_t)addr, size);
319 WB_END
320
321 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
322 return MemTracker::tracking_level() == NMT_detail;
323 WB_END
324
325 WB_ENTRY(void, WB_NMTOverflowHashBucket(JNIEnv* env, jobject o, jlong num))
326 address pc = (address)1;
327 for (jlong index = 0; index < num; index ++) {
328 NativeCallStack stack(&pc, 1);
329 os::malloc(0, mtTest, stack);
330 pc += MallocSiteTable::hash_buckets();
331 }
332 WB_END
333
334 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
335 // Test that we can downgrade NMT levels but not upgrade them.
336 if (MemTracker::tracking_level() == NMT_off) {
337 MemTracker::transition_to(NMT_off);
338 return MemTracker::tracking_level() == NMT_off;
339 } else {
340 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
341 MemTracker::transition_to(NMT_summary);
342 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
343
344 // Can't go to detail once NMT is set to summary.
345 MemTracker::transition_to(NMT_detail);
346 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
347
348 // Shutdown sets tracking level to minimal.
349 MemTracker::shutdown();
350 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
351
352 // Once the tracking level is minimal, we cannot increase to summary.
353 // The code ignores this request instead of asserting because if the malloc site
354 // table overflows in another thread, it tries to change the code to summary.
355 MemTracker::transition_to(NMT_summary);
356 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
357
358 // Really can never go up to detail, verify that the code would never do this.
359 MemTracker::transition_to(NMT_detail);
360 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
361 return MemTracker::tracking_level() == NMT_minimal;
362 }
363 WB_END
364 #endif // INCLUDE_NMT
365
366 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
367 assert(method != NULL, "method should not be null");
368 ThreadToNativeFromVM ttn(thread);
369 return env->FromReflectedMethod(method);
370 }
371
372 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
373 MutexLockerEx mu(Compile_lock);
374 CodeCache::mark_all_nmethods_for_deoptimization();
375 VM_Deoptimize op;
376 VMThread::execute(&op);
377 WB_END
378
379 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
380 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
381 int result = 0;
382 CHECK_JNI_EXCEPTION_(env, result);
383 MutexLockerEx mu(Compile_lock);
384 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
385 nmethod* code;
386 if (is_osr) {
387 int bci = InvocationEntryBci;
388 while ((code = mh->lookup_osr_nmethod_for(bci, CompLevel_none, false)) != NULL) {
389 code->mark_for_deoptimization();
390 ++result;
391 bci = code->osr_entry_bci() + 1;
392 }
393 } else {
394 code = mh->code();
395 }
396 if (code != NULL) {
397 code->mark_for_deoptimization();
398 ++result;
399 }
400 result += CodeCache::mark_for_deoptimization(mh());
401 if (result > 0) {
402 VM_Deoptimize op;
403 VMThread::execute(&op);
404 }
405 return result;
406 WB_END
407
408 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
409 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
410 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
411 MutexLockerEx mu(Compile_lock);
412 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
413 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
414 if (code == NULL) {
415 return JNI_FALSE;
416 }
417 return (code->is_alive() && !code->is_marked_for_deoptimization());
418 WB_END
419
420 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
421 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
422 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
423 MutexLockerEx mu(Compile_lock);
424 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
425 if (is_osr) {
426 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
427 } else {
428 return CompilationPolicy::can_be_compiled(mh, comp_level);
429 }
430 WB_END
431
432 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
433 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
434 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
435 MutexLockerEx mu(Compile_lock);
436 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
437 return mh->queued_for_compilation();
438 WB_END
439
440 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
441 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
442 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
443 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
444 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
445 return (code != NULL ? code->comp_level() : CompLevel_none);
446 WB_END
447
448 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
449 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
450 CHECK_JNI_EXCEPTION(env);
451 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
452 if (is_osr) {
453 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
454 } else {
455 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
456 }
457 WB_END
458
459 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
460 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
461 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
462 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
463 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
464 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
465 WB_END
466
467 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
468 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
469 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
470 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
471 bool result = mh->dont_inline();
472 mh->set_dont_inline(value == JNI_TRUE);
473 return result;
474 WB_END
475
476 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
477 if (comp_level == CompLevel_any) {
478 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
479 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
480 } else {
481 return CompileBroker::queue_size(comp_level);
482 }
483 WB_END
484
485 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
486 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
487 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
488 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
489 bool result = mh->force_inline();
490 mh->set_force_inline(value == JNI_TRUE);
491 return result;
492 WB_END
493
494 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
495 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
496 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
497 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
498 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
499 MutexLockerEx mu(Compile_lock);
500 return (mh->queued_for_compilation() || nm != NULL);
501 WB_END
502
503 class VM_WhiteBoxOperation : public VM_Operation {
504 public:
505 VM_WhiteBoxOperation() { }
506 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
507 bool allow_nested_vm_operations() const { return true; }
508 };
509
510 class AlwaysFalseClosure : public BoolObjectClosure {
511 public:
512 bool do_object_b(oop p) { return false; }
513 };
514
515 static AlwaysFalseClosure always_false;
516
517 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation {
518 public:
519 VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { }
520 void doit() {
521 _mdo->clean_method_data(&always_false);
522 }
523 private:
524 MethodData* _mdo;
525 };
526
527 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
528 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
529 CHECK_JNI_EXCEPTION(env);
530 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
531 MutexLockerEx mu(Compile_lock);
532 MethodData* mdo = mh->method_data();
533 MethodCounters* mcs = mh->method_counters();
534
535 if (mdo != NULL) {
536 mdo->init();
537 ResourceMark rm;
538 int arg_count = mdo->method()->size_of_parameters();
539 for (int i = 0; i < arg_count; i++) {
540 mdo->set_arg_modified(i, 0);
541 }
542 VM_WhiteBoxCleanMethodData op(mdo);
543 VMThread::execute(&op);
544 }
545
546 mh->clear_not_c1_compilable();
547 mh->clear_not_c2_compilable();
548 mh->clear_not_c2_osr_compilable();
549 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
550 if (mcs != NULL) {
551 mcs->backedge_counter()->init();
552 mcs->invocation_counter()->init();
553 mcs->set_interpreter_invocation_count(0);
554 mcs->set_interpreter_throwout_count(0);
555
556 #ifdef TIERED
557 mcs->set_rate(0.0F);
558 mh->set_prev_event_count(0);
559 mh->set_prev_time(0);
560 #endif
561 }
562 WB_END
563
564 template <typename T>
565 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*)) {
566 if (name == NULL) {
567 return false;
568 }
569 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
570 const char* flag_name = env->GetStringUTFChars(name, NULL);
571 bool result = (*TAt)(flag_name, value);
572 env->ReleaseStringUTFChars(name, flag_name);
573 return result;
574 }
575
576 template <typename T>
577 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
578 if (name == NULL) {
579 return false;
580 }
581 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
582 const char* flag_name = env->GetStringUTFChars(name, NULL);
583 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
584 env->ReleaseStringUTFChars(name, flag_name);
585 return result;
586 }
587
588 template <typename T>
589 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
590 ResourceMark rm(thread);
591 jclass clazz = env->FindClass(name->as_C_string());
592 CHECK_JNI_EXCEPTION_(env, NULL);
593 jmethodID methodID = env->GetStaticMethodID(clazz,
594 vmSymbols::valueOf_name()->as_C_string(),
595 sig->as_C_string());
596 CHECK_JNI_EXCEPTION_(env, NULL);
597 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
598 CHECK_JNI_EXCEPTION_(env, NULL);
599 return result;
600 }
601
602 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
603 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
604 }
605 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
606 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
607 }
608 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
609 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
610 }
611 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
612 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
613 }*/
614 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
615 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
616 }
617
618 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
619 bool result;
620 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
621 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
622 return booleanBox(thread, env, result);
623 }
624 return NULL;
625 WB_END
626
627 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
628 intx result;
629 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
630 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
631 return longBox(thread, env, result);
632 }
633 return NULL;
634 WB_END
635
636 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
637 uintx result;
638 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
639 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
640 return longBox(thread, env, result);
641 }
642 return NULL;
643 WB_END
644
645 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
646 uint64_t result;
647 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
648 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
649 return longBox(thread, env, result);
650 }
651 return NULL;
652 WB_END
653
654 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
655 double result;
656 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
657 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
658 return doubleBox(thread, env, result);
659 }
660 return NULL;
661 WB_END
662
663 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
664 ccstr ccstrResult;
665 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
666 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
667 jstring result = env->NewStringUTF(ccstrResult);
668 CHECK_JNI_EXCEPTION_(env, NULL);
669 return result;
670 }
671 return NULL;
672 WB_END
673
674 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
675 bool result = value == JNI_TRUE ? true : false;
676 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
677 WB_END
678
679 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
680 intx result = value;
681 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
682 WB_END
683
684 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
685 uintx result = value;
686 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
687 WB_END
688
689 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
690 uint64_t result = value;
691 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
692 WB_END
693
694 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
695 double result = value;
696 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
697 WB_END
698
699 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
700 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
701 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
702 ccstr ccstrResult = ccstrValue;
703 bool needFree;
704 {
705 ThreadInVMfromNative ttvfn(thread); // back to VM
706 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
707 }
708 if (value != NULL) {
709 env->ReleaseStringUTFChars(value, ccstrValue);
710 }
711 if (needFree) {
712 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
713 }
714 WB_END
715
716
717 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
718 ResourceMark rm(THREAD);
719 int len;
720 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
721 return (StringTable::lookup(name, len) != NULL);
722 WB_END
723
724 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
725 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
726 Universe::heap()->collect(GCCause::_last_ditch_collection);
727 #if INCLUDE_ALL_GCS
728 if (UseG1GC) {
729 // Needs to be cleared explicitly for G1
730 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
731 }
732 #endif // INCLUDE_ALL_GCS
733 WB_END
734
735 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
736 Universe::heap()->collect(GCCause::_wb_young_gc);
737 WB_END
738
739 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
740 // static+volatile in order to force the read to happen
741 // (not be eliminated by the compiler)
742 static char c;
743 static volatile char* p;
744
745 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
746 if (p == NULL) {
747 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
748 }
749
750 c = *p;
751 WB_END
752
753 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
754 const char* cpu_features = VM_Version::cpu_features();
755 ThreadToNativeFromVM ttn(thread);
756 jstring features_string = env->NewStringUTF(cpu_features);
757
758 CHECK_JNI_EXCEPTION_(env, NULL);
759
760 return features_string;
761 WB_END
762
763
764 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
765 ResourceMark rm(THREAD);
766 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
767 CHECK_JNI_EXCEPTION_(env, NULL);
768 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
769 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
770 jobjectArray result = NULL;
771 if (code == NULL) {
772 return result;
773 }
774 int insts_size = code->insts_size();
775
776 ThreadToNativeFromVM ttn(thread);
777 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
778 CHECK_JNI_EXCEPTION_(env, NULL);
779 result = env->NewObjectArray(2, clazz, NULL);
780 if (result == NULL) {
781 return result;
782 }
783
784 jobject obj = integerBox(thread, env, code->comp_level());
785 CHECK_JNI_EXCEPTION_(env, NULL);
786 env->SetObjectArrayElement(result, 0, obj);
787
788 jbyteArray insts = env->NewByteArray(insts_size);
789 CHECK_JNI_EXCEPTION_(env, NULL);
790 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
791 env->SetObjectArrayElement(result, 1, insts);
792
793 return result;
794 WB_END
795
796
797 int WhiteBox::array_bytes_to_length(size_t bytes) {
798 return Array<u1>::bytes_to_length(bytes);
799 }
800
801 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
802 if (size < 0) {
803 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
804 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
805 }
806
807 oop class_loader_oop = JNIHandles::resolve(class_loader);
808 ClassLoaderData* cld = class_loader_oop != NULL
809 ? java_lang_ClassLoader::loader_data(class_loader_oop)
810 : ClassLoaderData::the_null_class_loader_data();
811
812 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
813
814 return (jlong)(uintptr_t)metadata;
815 WB_END
816
817 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
818 oop class_loader_oop = JNIHandles::resolve(class_loader);
819 ClassLoaderData* cld = class_loader_oop != NULL
820 ? java_lang_ClassLoader::loader_data(class_loader_oop)
821 : ClassLoaderData::the_null_class_loader_data();
822
823 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
824 WB_END
825
826 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
827 if (inc < 0) {
828 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
829 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
830 }
831
832 jlong max_size_t = (jlong) ((size_t) -1);
833 if (inc > max_size_t) {
834 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
835 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
836 }
837
838 size_t new_cap_until_GC = 0;
839 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
840 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
841 if (!success) {
842 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
843 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
844 "due to contention with another thread");
845 }
846 return (jlong) new_cap_until_GC;
847 WB_END
848
849 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
850 return (jlong) MetaspaceGC::capacity_until_GC();
851 WB_END
852
853 //Some convenience methods to deal with objects from java
854 int WhiteBox::offset_for_field(const char* field_name, oop object,
855 Symbol* signature_symbol) {
856 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
857 Thread* THREAD = Thread::current();
858
859 //Get the class of our object
860 Klass* arg_klass = object->klass();
861 //Turn it into an instance-klass
862 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
863
864 //Create symbols to look for in the class
865 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
866 THREAD);
867
868 //To be filled in with an offset of the field we're looking for
869 fieldDescriptor fd;
870
871 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
872 if (res == NULL) {
873 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
874 name_symbol->as_C_string());
875 fatal("Invalid layout of preloaded class");
876 }
877
878 //fetch the field at the offset we've found
879 int dest_offset = fd.offset();
880
881 return dest_offset;
882 }
883
884
885 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
886 int offset = offset_for_field(field_name, object,
887 vmSymbols::string_signature());
888 oop string = object->obj_field(offset);
889 if (string == NULL) {
890 return NULL;
891 }
892 const char* ret = java_lang_String::as_utf8_string(string);
893 return ret;
894 }
895
896 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
897 int offset =
898 offset_for_field(field_name, object, vmSymbols::bool_signature());
899 bool ret = (object->bool_field(offset) == JNI_TRUE);
900 return ret;
901 }
902
903 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
904 ResourceMark rm;
905 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
906
907 // one by one registration natives for exception catching
908 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
909 CHECK_JNI_EXCEPTION(env);
910 for (int i = 0, n = method_count; i < n; ++i) {
911 // Skip dummy entries
912 if (method_array[i].fnPtr == NULL) continue;
913 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
914 jthrowable throwable_obj = env->ExceptionOccurred();
915 if (throwable_obj != NULL) {
916 env->ExceptionClear();
917 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
918 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
919 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
920 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
921 method_array[i].name, method_array[i].signature);
922 }
923 } else {
924 // Registration failed unexpectedly.
925 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
926 method_array[i].name, method_array[i].signature);
927 env->UnregisterNatives(wbclass);
928 break;
929 }
930 }
931 }
932 }
933
934 #define CC (char*)
935
936 static JNINativeMethod methods[] = {
937 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
938 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
939 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
940 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
941 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
942 {CC"parseCommandLine",
943 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
944 (void*) &WB_ParseCommandLine
945 },
946 {CC"getCompressedOopsMaxHeapSize", CC"()J",
947 (void*)&WB_GetCompressedOopsMaxHeapSize},
948 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
949 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
950 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
951 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
952 #if INCLUDE_ALL_GCS
953 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
954 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
955 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
956 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
957 #endif // INCLUDE_ALL_GCS
958 #if INCLUDE_NMT
959 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
960 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
961 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
962 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
963 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
964 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
965 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
966 {CC"NMTOverflowHashBucket", CC"(J)V", (void*)&WB_NMTOverflowHashBucket},
967 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
968 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
969 #endif // INCLUDE_NMT
970 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
971 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
972 (void*)&WB_DeoptimizeMethod },
973 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
974 (void*)&WB_IsMethodCompiled },
975 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
976 (void*)&WB_IsMethodCompilable},
977 {CC"isMethodQueuedForCompilation",
978 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
979 {CC"makeMethodNotCompilable",
980 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
981 {CC"testSetDontInlineMethod",
982 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
983 {CC"getMethodCompilationLevel",
984 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
985 {CC"getMethodEntryBci",
986 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
987 {CC"getCompileQueueSize",
988 CC"(I)I", (void*)&WB_GetCompileQueueSize},
989 {CC"testSetForceInlineMethod",
990 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
991 {CC"enqueueMethodForCompilation",
992 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
993 {CC"clearMethodState",
994 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
995 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
996 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
997 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
998 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
999 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1000 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1001 (void*)&WB_SetStringVMFlag},
1002 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1003 (void*)&WB_GetBooleanVMFlag},
1004 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1005 (void*)&WB_GetIntxVMFlag},
1006 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1007 (void*)&WB_GetUintxVMFlag},
1008 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1009 (void*)&WB_GetUint64VMFlag},
1010 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1011 (void*)&WB_GetDoubleVMFlag},
1012 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1013 (void*)&WB_GetStringVMFlag},
1014 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1015 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1016 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1017 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1018 {CC"allocateMetaspace",
1019 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1020 {CC"freeMetaspace",
1021 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1022 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1023 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1024 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1025 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1026 (void*)&WB_GetNMethod },
1027 };
1028
1029 #undef CC
1030
1031 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1032 {
1033 if (WhiteBoxAPI) {
1034 // Make sure that wbclass is loaded by the null classloader
1035 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1036 Handle loader(ikh->class_loader());
1037 if (loader.is_null()) {
1038 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1039 WhiteBox::register_extended(env, wbclass, thread);
1040 WhiteBox::set_used();
1041 }
1042 }
1043 }
1044 JVM_END