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