Tue, 11 Nov 2014 10:48:06 -0800
8058251: assert(_count > 0) failed: Negative counter when running runtime/NMT/MallocTrackingVerify.java
Summary: Fixed an issue when overflowing the MallocSite hash table bucket
Reviewed-by: coleenp, gtriantafill
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 */
25 #include "precompiled.hpp"
27 #include "memory/metadataFactory.hpp"
28 #include "memory/universe.hpp"
29 #include "oops/oop.inline.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/classLoaderData.hpp"
34 #include "prims/whitebox.hpp"
35 #include "prims/wbtestmethods/parserTests.hpp"
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"
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
52 #if INCLUDE_NMT
53 #include "services/mallocSiteTable.hpp"
54 #include "services/memTracker.hpp"
55 #include "utilities/nativeCallStack.hpp"
56 #endif // INCLUDE_NMT
58 #include "compiler/compileBroker.hpp"
59 #include "runtime/compilationPolicy.hpp"
61 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
63 #define SIZE_T_MAX_VALUE ((size_t) -1)
65 bool WhiteBox::_used = false;
67 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
68 return (jlong)(void*)JNIHandles::resolve(obj);
69 WB_END
71 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
72 return heapOopSize;
73 WB_END
76 class WBIsKlassAliveClosure : public KlassClosure {
77 Symbol* _name;
78 bool _found;
79 public:
80 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
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 }
90 bool found() const {
91 return _found;
92 }
93 };
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
101 WBIsKlassAliveClosure closure(sym);
102 ClassLoaderDataGraph::classes_do(&closure);
104 return closure.found();
105 WB_END
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
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
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);
125 env->ReleaseStringUTFChars(name, resource_name);
126 return result;
127 WB_END
129 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
130 return (jlong)Arguments::max_heap_for_compressed_oops();
131 }
132 WB_END
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
143 #ifndef PRODUCT
144 // Forward declaration
145 void TestReservedSpace_test();
146 void TestReserveMemorySpecial_test();
147 void TestVirtualSpace_test();
148 void TestMetaspaceAux_test();
149 #endif
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
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);
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
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 }
196 long seed = os::random();
197 tty->print_cr("Random seed is %ld", seed);
198 os::init_random(seed);
200 for (size_t i = 0; i < iterations; i++) {
202 // Whether we will shrink or grow
203 bool shrink = os::random() % 2L == 0;
205 // Get random delta to resize virtual space
206 size_t delta = (size_t)os::random() % magnitude;
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 }
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 }
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 }
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 }
245 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
246 (size_t) magnitude, (size_t) iterations);
247 WB_END
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
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
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
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
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
293 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
294 return (jint)HeapRegion::GrainBytes;
295 WB_END
296 #endif // INCLUDE_ALL_GCS
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
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)(uintptr_t)os::malloc(size, mtTest, stack);
313 WB_END
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
320 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
321 jlong addr = 0;
323 addr = (jlong)(uintptr_t)os::reserve_memory(size);
324 MemTracker::record_virtual_memory_type((address)addr, mtTest);
326 return addr;
327 WB_END
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
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
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
343 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
344 return MemTracker::tracking_level() == NMT_detail;
345 WB_END
347 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
348 // Test that we can downgrade NMT levels but not upgrade them.
349 if (MemTracker::tracking_level() == NMT_off) {
350 MemTracker::transition_to(NMT_off);
351 return MemTracker::tracking_level() == NMT_off;
352 } else {
353 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
354 MemTracker::transition_to(NMT_summary);
355 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
357 // Can't go to detail once NMT is set to summary.
358 MemTracker::transition_to(NMT_detail);
359 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
361 // Shutdown sets tracking level to minimal.
362 MemTracker::shutdown();
363 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
365 // Once the tracking level is minimal, we cannot increase to summary.
366 // The code ignores this request instead of asserting because if the malloc site
367 // table overflows in another thread, it tries to change the code to summary.
368 MemTracker::transition_to(NMT_summary);
369 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
371 // Really can never go up to detail, verify that the code would never do this.
372 MemTracker::transition_to(NMT_detail);
373 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
374 return MemTracker::tracking_level() == NMT_minimal;
375 }
376 WB_END
378 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
379 int hash_size = MallocSiteTable::hash_buckets();
380 assert(hash_size > 0, "NMT hash_size should be > 0");
381 return (jint)hash_size;
382 WB_END
383 #endif // INCLUDE_NMT
385 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
386 assert(method != NULL, "method should not be null");
387 ThreadToNativeFromVM ttn(thread);
388 return env->FromReflectedMethod(method);
389 }
391 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
392 MutexLockerEx mu(Compile_lock);
393 CodeCache::mark_all_nmethods_for_deoptimization();
394 VM_Deoptimize op;
395 VMThread::execute(&op);
396 WB_END
398 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
399 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
400 int result = 0;
401 CHECK_JNI_EXCEPTION_(env, result);
402 MutexLockerEx mu(Compile_lock);
403 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
404 if (is_osr) {
405 result += mh->mark_osr_nmethods();
406 } else if (mh->code() != NULL) {
407 mh->code()->mark_for_deoptimization();
408 ++result;
409 }
410 result += CodeCache::mark_for_deoptimization(mh());
411 if (result > 0) {
412 VM_Deoptimize op;
413 VMThread::execute(&op);
414 }
415 return result;
416 WB_END
418 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
419 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
420 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
421 MutexLockerEx mu(Compile_lock);
422 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
423 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
424 if (code == NULL) {
425 return JNI_FALSE;
426 }
427 return (code->is_alive() && !code->is_marked_for_deoptimization());
428 WB_END
430 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
431 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
432 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
433 MutexLockerEx mu(Compile_lock);
434 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
435 if (is_osr) {
436 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
437 } else {
438 return CompilationPolicy::can_be_compiled(mh, comp_level);
439 }
440 WB_END
442 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
443 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
444 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
445 MutexLockerEx mu(Compile_lock);
446 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
447 return mh->queued_for_compilation();
448 WB_END
450 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
451 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
452 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
453 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
454 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
455 return (code != NULL ? code->comp_level() : CompLevel_none);
456 WB_END
458 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
459 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
460 CHECK_JNI_EXCEPTION(env);
461 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
462 if (is_osr) {
463 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
464 } else {
465 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
466 }
467 WB_END
469 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
470 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
471 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
472 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
473 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
474 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
475 WB_END
477 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
478 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
479 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
480 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
481 bool result = mh->dont_inline();
482 mh->set_dont_inline(value == JNI_TRUE);
483 return result;
484 WB_END
486 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
487 if (comp_level == CompLevel_any) {
488 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
489 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
490 } else {
491 return CompileBroker::queue_size(comp_level);
492 }
493 WB_END
495 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
496 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
497 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
498 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
499 bool result = mh->force_inline();
500 mh->set_force_inline(value == JNI_TRUE);
501 return result;
502 WB_END
504 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
505 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
506 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
507 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
508 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
509 MutexLockerEx mu(Compile_lock);
510 return (mh->queued_for_compilation() || nm != NULL);
511 WB_END
513 class VM_WhiteBoxOperation : public VM_Operation {
514 public:
515 VM_WhiteBoxOperation() { }
516 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
517 bool allow_nested_vm_operations() const { return true; }
518 };
520 class AlwaysFalseClosure : public BoolObjectClosure {
521 public:
522 bool do_object_b(oop p) { return false; }
523 };
525 static AlwaysFalseClosure always_false;
527 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation {
528 public:
529 VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { }
530 void doit() {
531 _mdo->clean_method_data(&always_false);
532 }
533 private:
534 MethodData* _mdo;
535 };
537 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
538 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
539 CHECK_JNI_EXCEPTION(env);
540 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
541 MutexLockerEx mu(Compile_lock);
542 MethodData* mdo = mh->method_data();
543 MethodCounters* mcs = mh->method_counters();
545 if (mdo != NULL) {
546 mdo->init();
547 ResourceMark rm;
548 int arg_count = mdo->method()->size_of_parameters();
549 for (int i = 0; i < arg_count; i++) {
550 mdo->set_arg_modified(i, 0);
551 }
552 VM_WhiteBoxCleanMethodData op(mdo);
553 VMThread::execute(&op);
554 }
556 mh->clear_not_c1_compilable();
557 mh->clear_not_c2_compilable();
558 mh->clear_not_c2_osr_compilable();
559 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
560 if (mcs != NULL) {
561 mcs->backedge_counter()->init();
562 mcs->invocation_counter()->init();
563 mcs->set_interpreter_invocation_count(0);
564 mcs->set_interpreter_throwout_count(0);
566 #ifdef TIERED
567 mcs->set_rate(0.0F);
568 mh->set_prev_event_count(0);
569 mh->set_prev_time(0);
570 #endif
571 }
572 WB_END
574 template <typename T>
575 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*)) {
576 if (name == NULL) {
577 return false;
578 }
579 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
580 const char* flag_name = env->GetStringUTFChars(name, NULL);
581 bool result = (*TAt)(flag_name, value);
582 env->ReleaseStringUTFChars(name, flag_name);
583 return result;
584 }
586 template <typename T>
587 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
588 if (name == NULL) {
589 return false;
590 }
591 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
592 const char* flag_name = env->GetStringUTFChars(name, NULL);
593 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
594 env->ReleaseStringUTFChars(name, flag_name);
595 return result;
596 }
598 template <typename T>
599 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
600 ResourceMark rm(thread);
601 jclass clazz = env->FindClass(name->as_C_string());
602 CHECK_JNI_EXCEPTION_(env, NULL);
603 jmethodID methodID = env->GetStaticMethodID(clazz,
604 vmSymbols::valueOf_name()->as_C_string(),
605 sig->as_C_string());
606 CHECK_JNI_EXCEPTION_(env, NULL);
607 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
608 CHECK_JNI_EXCEPTION_(env, NULL);
609 return result;
610 }
612 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
613 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
614 }
615 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
616 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
617 }
618 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
619 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
620 }
621 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
622 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
623 }*/
624 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
625 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
626 }
628 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
629 bool result;
630 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
631 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
632 return booleanBox(thread, env, result);
633 }
634 return NULL;
635 WB_END
637 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
638 intx result;
639 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
640 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
641 return longBox(thread, env, result);
642 }
643 return NULL;
644 WB_END
646 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
647 uintx result;
648 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
649 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
650 return longBox(thread, env, result);
651 }
652 return NULL;
653 WB_END
655 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
656 uint64_t result;
657 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
658 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
659 return longBox(thread, env, result);
660 }
661 return NULL;
662 WB_END
664 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
665 double result;
666 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
667 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
668 return doubleBox(thread, env, result);
669 }
670 return NULL;
671 WB_END
673 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
674 ccstr ccstrResult;
675 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
676 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
677 jstring result = env->NewStringUTF(ccstrResult);
678 CHECK_JNI_EXCEPTION_(env, NULL);
679 return result;
680 }
681 return NULL;
682 WB_END
684 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
685 bool result = value == JNI_TRUE ? true : false;
686 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
687 WB_END
689 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
690 intx result = value;
691 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
692 WB_END
694 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
695 uintx result = value;
696 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
697 WB_END
699 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
700 uint64_t result = value;
701 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
702 WB_END
704 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
705 double result = value;
706 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
707 WB_END
709 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
710 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
711 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
712 ccstr ccstrResult = ccstrValue;
713 bool needFree;
714 {
715 ThreadInVMfromNative ttvfn(thread); // back to VM
716 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
717 }
718 if (value != NULL) {
719 env->ReleaseStringUTFChars(value, ccstrValue);
720 }
721 if (needFree) {
722 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
723 }
724 WB_END
727 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
728 ResourceMark rm(THREAD);
729 int len;
730 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
731 return (StringTable::lookup(name, len) != NULL);
732 WB_END
734 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
735 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
736 Universe::heap()->collect(GCCause::_last_ditch_collection);
737 #if INCLUDE_ALL_GCS
738 if (UseG1GC) {
739 // Needs to be cleared explicitly for G1
740 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
741 }
742 #endif // INCLUDE_ALL_GCS
743 WB_END
745 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
746 Universe::heap()->collect(GCCause::_wb_young_gc);
747 WB_END
749 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
750 // static+volatile in order to force the read to happen
751 // (not be eliminated by the compiler)
752 static char c;
753 static volatile char* p;
755 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
756 if (p == NULL) {
757 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
758 }
760 c = *p;
761 WB_END
763 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
764 const char* cpu_features = VM_Version::cpu_features();
765 ThreadToNativeFromVM ttn(thread);
766 jstring features_string = env->NewStringUTF(cpu_features);
768 CHECK_JNI_EXCEPTION_(env, NULL);
770 return features_string;
771 WB_END
774 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
775 ResourceMark rm(THREAD);
776 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
777 CHECK_JNI_EXCEPTION_(env, NULL);
778 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
779 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
780 jobjectArray result = NULL;
781 if (code == NULL) {
782 return result;
783 }
784 int insts_size = code->insts_size();
786 ThreadToNativeFromVM ttn(thread);
787 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
788 CHECK_JNI_EXCEPTION_(env, NULL);
789 result = env->NewObjectArray(2, clazz, NULL);
790 if (result == NULL) {
791 return result;
792 }
794 jobject obj = integerBox(thread, env, code->comp_level());
795 CHECK_JNI_EXCEPTION_(env, NULL);
796 env->SetObjectArrayElement(result, 0, obj);
798 jbyteArray insts = env->NewByteArray(insts_size);
799 CHECK_JNI_EXCEPTION_(env, NULL);
800 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
801 env->SetObjectArrayElement(result, 1, insts);
803 return result;
804 WB_END
807 int WhiteBox::array_bytes_to_length(size_t bytes) {
808 return Array<u1>::bytes_to_length(bytes);
809 }
811 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
812 if (size < 0) {
813 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
814 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
815 }
817 oop class_loader_oop = JNIHandles::resolve(class_loader);
818 ClassLoaderData* cld = class_loader_oop != NULL
819 ? java_lang_ClassLoader::loader_data(class_loader_oop)
820 : ClassLoaderData::the_null_class_loader_data();
822 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
824 return (jlong)(uintptr_t)metadata;
825 WB_END
827 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
828 oop class_loader_oop = JNIHandles::resolve(class_loader);
829 ClassLoaderData* cld = class_loader_oop != NULL
830 ? java_lang_ClassLoader::loader_data(class_loader_oop)
831 : ClassLoaderData::the_null_class_loader_data();
833 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
834 WB_END
836 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
837 if (inc < 0) {
838 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
839 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
840 }
842 jlong max_size_t = (jlong) ((size_t) -1);
843 if (inc > max_size_t) {
844 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
845 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
846 }
848 size_t new_cap_until_GC = 0;
849 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
850 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
851 if (!success) {
852 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
853 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
854 "due to contention with another thread");
855 }
856 return (jlong) new_cap_until_GC;
857 WB_END
859 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
860 return (jlong) MetaspaceGC::capacity_until_GC();
861 WB_END
863 //Some convenience methods to deal with objects from java
864 int WhiteBox::offset_for_field(const char* field_name, oop object,
865 Symbol* signature_symbol) {
866 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
867 Thread* THREAD = Thread::current();
869 //Get the class of our object
870 Klass* arg_klass = object->klass();
871 //Turn it into an instance-klass
872 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
874 //Create symbols to look for in the class
875 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
876 THREAD);
878 //To be filled in with an offset of the field we're looking for
879 fieldDescriptor fd;
881 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
882 if (res == NULL) {
883 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
884 name_symbol->as_C_string());
885 fatal("Invalid layout of preloaded class");
886 }
888 //fetch the field at the offset we've found
889 int dest_offset = fd.offset();
891 return dest_offset;
892 }
895 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
896 int offset = offset_for_field(field_name, object,
897 vmSymbols::string_signature());
898 oop string = object->obj_field(offset);
899 if (string == NULL) {
900 return NULL;
901 }
902 const char* ret = java_lang_String::as_utf8_string(string);
903 return ret;
904 }
906 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
907 int offset =
908 offset_for_field(field_name, object, vmSymbols::bool_signature());
909 bool ret = (object->bool_field(offset) == JNI_TRUE);
910 return ret;
911 }
913 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
914 ResourceMark rm;
915 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
917 // one by one registration natives for exception catching
918 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
919 CHECK_JNI_EXCEPTION(env);
920 for (int i = 0, n = method_count; i < n; ++i) {
921 // Skip dummy entries
922 if (method_array[i].fnPtr == NULL) continue;
923 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
924 jthrowable throwable_obj = env->ExceptionOccurred();
925 if (throwable_obj != NULL) {
926 env->ExceptionClear();
927 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
928 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
929 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
930 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
931 method_array[i].name, method_array[i].signature);
932 }
933 } else {
934 // Registration failed unexpectedly.
935 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
936 method_array[i].name, method_array[i].signature);
937 env->UnregisterNatives(wbclass);
938 break;
939 }
940 }
941 }
942 }
944 #define CC (char*)
946 static JNINativeMethod methods[] = {
947 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
948 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
949 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
950 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
951 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
952 {CC"classKnownToNotExist",
953 CC"(Ljava/lang/ClassLoader;Ljava/lang/String;)Z",(void*)&WB_ClassKnownToNotExist},
954 {CC"getLookupCacheURLs", CC"(Ljava/lang/ClassLoader;)[Ljava/net/URL;", (void*)&WB_GetLookupCacheURLs},
955 {CC"getLookupCacheMatches", CC"(Ljava/lang/ClassLoader;Ljava/lang/String;)[I",
956 (void*)&WB_GetLookupCacheMatches},
957 {CC"parseCommandLine",
958 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
959 (void*) &WB_ParseCommandLine
960 },
961 {CC"getCompressedOopsMaxHeapSize", CC"()J",
962 (void*)&WB_GetCompressedOopsMaxHeapSize},
963 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
964 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
965 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
966 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
967 #if INCLUDE_ALL_GCS
968 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
969 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
970 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
971 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
972 #endif // INCLUDE_ALL_GCS
973 #if INCLUDE_NMT
974 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
975 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
976 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
977 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
978 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
979 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
980 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
981 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
982 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
983 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
984 #endif // INCLUDE_NMT
985 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
986 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
987 (void*)&WB_DeoptimizeMethod },
988 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
989 (void*)&WB_IsMethodCompiled },
990 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
991 (void*)&WB_IsMethodCompilable},
992 {CC"isMethodQueuedForCompilation",
993 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
994 {CC"makeMethodNotCompilable",
995 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
996 {CC"testSetDontInlineMethod",
997 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
998 {CC"getMethodCompilationLevel",
999 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1000 {CC"getMethodEntryBci",
1001 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1002 {CC"getCompileQueueSize",
1003 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1004 {CC"testSetForceInlineMethod",
1005 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1006 {CC"enqueueMethodForCompilation",
1007 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1008 {CC"clearMethodState",
1009 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1010 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1011 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1012 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1013 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1014 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1015 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1016 (void*)&WB_SetStringVMFlag},
1017 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1018 (void*)&WB_GetBooleanVMFlag},
1019 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1020 (void*)&WB_GetIntxVMFlag},
1021 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1022 (void*)&WB_GetUintxVMFlag},
1023 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1024 (void*)&WB_GetUint64VMFlag},
1025 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1026 (void*)&WB_GetDoubleVMFlag},
1027 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1028 (void*)&WB_GetStringVMFlag},
1029 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1030 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1031 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1032 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1033 {CC"allocateMetaspace",
1034 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1035 {CC"freeMetaspace",
1036 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1037 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1038 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1039 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1040 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1041 (void*)&WB_GetNMethod },
1042 };
1044 #undef CC
1046 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1047 {
1048 if (WhiteBoxAPI) {
1049 // Make sure that wbclass is loaded by the null classloader
1050 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1051 Handle loader(ikh->class_loader());
1052 if (loader.is_null()) {
1053 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1054 WhiteBox::register_extended(env, wbclass, thread);
1055 WhiteBox::set_used();
1056 }
1057 }
1058 }
1059 JVM_END