1 /*
2 * Copyright (c) 2012, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26
27 #include <new>
28
29 #include "classfile/classLoaderData.hpp"
30 #include "classfile/modules.hpp"
31 #include "classfile/stringTable.hpp"
32 #include "code/codeCache.hpp"
33 #include "compiler/methodMatcher.hpp"
34 #include "compiler/directivesParser.hpp"
35 #include "jvmtifiles/jvmtiEnv.hpp"
36 #include "memory/metadataFactory.hpp"
37 #include "memory/metaspaceShared.hpp"
38 #include "memory/iterator.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "memory/universe.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "oops/constantPool.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "prims/wbtestmethods/parserTests.hpp"
45 #include "prims/whitebox.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/compilationPolicy.hpp"
48 #include "runtime/deoptimization.hpp"
49 #include "runtime/interfaceSupport.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/os.hpp"
52 #include "runtime/sweeper.hpp"
53 #include "runtime/thread.hpp"
54 #include "runtime/vm_version.hpp"
55 #include "utilities/array.hpp"
56 #include "utilities/debug.hpp"
57 #include "utilities/exceptions.hpp"
58 #include "utilities/macros.hpp"
59 #if INCLUDE_ALL_GCS
60 #include "gc/g1/concurrentMarkThread.hpp"
61 #include "gc/g1/g1CollectedHeap.inline.hpp"
62 #include "gc/g1/g1ConcurrentMark.hpp"
63 #include "gc/g1/heapRegionRemSet.hpp"
64 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
65 #include "gc/parallel/adjoiningGenerations.hpp"
66 #endif // INCLUDE_ALL_GCS
67 #if INCLUDE_NMT
68 #include "services/mallocSiteTable.hpp"
69 #include "services/memTracker.hpp"
70 #include "utilities/nativeCallStack.hpp"
71 #endif // INCLUDE_NMT
72
73
74 #define SIZE_T_MAX_VALUE ((size_t) -1)
75
76 bool WhiteBox::_used = false;
77 volatile bool WhiteBox::compilation_locked = false;
78
79 class VM_WhiteBoxOperation : public VM_Operation {
80 public:
81 VM_WhiteBoxOperation() { }
82 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
83 bool allow_nested_vm_operations() const { return true; }
84 };
85
86
87 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
88 return (jlong)(void*)JNIHandles::resolve(obj);
89 WB_END
90
91 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
92 return heapOopSize;
93 WB_END
94
95 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
96 return os::vm_page_size();
97 WB_END
98
99 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
100 return os::vm_allocation_granularity();
101 WB_END
102
103 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
104 return os::large_page_size();
105 WB_END
106
107 class WBIsKlassAliveClosure : public KlassClosure {
108 Symbol* _name;
109 bool _found;
110 public:
111 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
112
113 void do_klass(Klass* k) {
114 if (_found) return;
115 Symbol* ksym = k->name();
116 if (ksym->fast_compare(_name) == 0) {
117 _found = true;
118 }
119 }
120
121 bool found() const {
122 return _found;
123 }
124 };
125
126 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
127 Handle h_name = JNIHandles::resolve(name);
128 if (h_name.is_null()) return false;
129 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
130 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
131
132 WBIsKlassAliveClosure closure(sym);
133 ClassLoaderDataGraph::classes_do(&closure);
134
135 return closure.found();
136 WB_END
137
138 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
139 #if INCLUDE_JVMTI
140 ResourceMark rm;
141 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
142 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
143 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
144 assert(err == JVMTI_ERROR_NONE, "must not fail");
145 #endif
146 }
147 WB_END
148
149 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
150 #if INCLUDE_JVMTI
151 ResourceMark rm;
152 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
153 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
154 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
155 assert(err == JVMTI_ERROR_NONE, "must not fail");
156 #endif
157 }
158 WB_END
159
160
161 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
162 return (jlong)Arguments::max_heap_for_compressed_oops();
163 }
164 WB_END
165
166 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
167 CollectorPolicy * p = GC::gc()->heap()->collector_policy();
168 tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
169 SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
170 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
171 p->space_alignment(), p->heap_alignment());
172 }
173 WB_END
174
175 #ifndef PRODUCT
176 // Forward declaration
177 void TestReservedSpace_test();
178 void TestReserveMemorySpecial_test();
179 void TestVirtualSpace_test();
180 void TestMetaspaceAux_test();
181 #endif
182
183 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
184 #ifndef PRODUCT
185 TestReservedSpace_test();
186 TestReserveMemorySpecial_test();
187 TestVirtualSpace_test();
188 TestMetaspaceAux_test();
189 #endif
190 WB_END
191
192 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
193 size_t granularity = os::vm_allocation_granularity();
194 ReservedHeapSpace rhs(100 * granularity, granularity, false);
195 VirtualSpace vs;
196 vs.initialize(rhs, 50 * granularity);
197
198 // Check if constraints are complied
199 if (!( UseCompressedOops && rhs.base() != NULL &&
200 Universe::narrow_oop_base() != NULL &&
201 Universe::narrow_oop_use_implicit_null_checks() )) {
202 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
203 "\tUseCompressedOops is %d\n"
204 "\trhs.base() is " PTR_FORMAT "\n"
205 "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
206 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
207 UseCompressedOops,
208 p2i(rhs.base()),
209 p2i(Universe::narrow_oop_base()),
210 Universe::narrow_oop_use_implicit_null_checks());
211 return;
212 }
213 tty->print_cr("Reading from no access area... ");
214 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
215 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
216 WB_END
217
218 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
219 size_t magnitude, size_t iterations) {
220 size_t granularity = os::vm_allocation_granularity();
221 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
222 VirtualSpace vs;
223 if (!vs.initialize(rhs, 0)) {
224 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
225 return 3;
226 }
227
228 long seed = os::random();
229 tty->print_cr("Random seed is %ld", seed);
230 os::init_random(seed);
231
232 for (size_t i = 0; i < iterations; i++) {
233
234 // Whether we will shrink or grow
235 bool shrink = os::random() % 2L == 0;
236
237 // Get random delta to resize virtual space
238 size_t delta = (size_t)os::random() % magnitude;
239
240 // If we are about to shrink virtual space below zero, then expand instead
241 if (shrink && vs.committed_size() < delta) {
242 shrink = false;
243 }
244
245 // Resizing by delta
246 if (shrink) {
247 vs.shrink_by(delta);
248 } else {
249 // If expanding fails expand_by will silently return false
250 vs.expand_by(delta, true);
251 }
252 }
253 return 0;
254 }
255
256 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
257 jlong reserved_space_size, jlong magnitude, jlong iterations))
258 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
259 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
260 iterations);
261 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
262 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
263 return 1;
264 }
265
266 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
267 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
268 if (sizeof(size_t) < sizeof(jlong)) {
269 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
270 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
271 || iterations > size_t_max_value) {
272 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
273 return 2;
274 }
275 }
276
277 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
278 (size_t) magnitude, (size_t) iterations);
279 WB_END
280
281 static const jint serial_code = 1;
282 static const jint parallel_code = 2;
283 static const jint cms_code = 4;
284 static const jint g1_code = 8;
285
286 WB_ENTRY(jint, WB_CurrentGC(JNIEnv* env, jobject o, jobject obj))
287 if (UseSerialGC) {
288 return serial_code;
289 } else if (UseParallelGC || UseParallelOldGC) {
290 return parallel_code;
291 } if (UseConcMarkSweepGC) {
292 return cms_code;
293 } else if (UseG1GC) {
294 return g1_code;
295 }
296 ShouldNotReachHere();
297 return 0;
298 WB_END
299
300 WB_ENTRY(jint, WB_AllSupportedGC(JNIEnv* env, jobject o, jobject obj))
301 #if INCLUDE_ALL_GCS
302 return serial_code | parallel_code | cms_code | g1_code;
303 #else
304 return serial_code;
305 #endif // INCLUDE_ALL_GCS
306 WB_END
307
308 WB_ENTRY(jboolean, WB_GCSelectedByErgo(JNIEnv* env, jobject o, jobject obj))
309 if (UseSerialGC) {
310 return FLAG_IS_ERGO(UseSerialGC);
311 } else if (UseParallelGC) {
312 return FLAG_IS_ERGO(UseParallelGC);
313 } else if (UseParallelOldGC) {
314 return FLAG_IS_ERGO(UseParallelOldGC);
315 } else if (UseConcMarkSweepGC) {
316 return FLAG_IS_ERGO(UseConcMarkSweepGC);
317 } else if (UseG1GC) {
318 return FLAG_IS_ERGO(UseG1GC);
319 }
320 ShouldNotReachHere();
321 return false;
322 WB_END
323
324 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
325 oop p = JNIHandles::resolve(obj);
326 #if INCLUDE_ALL_GCS
327 if (UseG1GC) {
328 G1CollectedHeap* g1 = G1CollectedHeap::heap();
329 const HeapRegion* hr = g1->heap_region_containing(p);
330 if (hr == NULL) {
331 return false;
332 }
333 return !(hr->is_young());
334 } else if (UseParallelGC) {
335 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
336 return !psh->is_in_young(p);
337 }
338 #endif // INCLUDE_ALL_GCS
339 GenCollectedHeap* gch = GenCollectedHeap::heap();
340 return !gch->is_in_young(p);
341 WB_END
342
343 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
344 oop p = JNIHandles::resolve(obj);
345 return p->size() * HeapWordSize;
346 WB_END
347
348 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
349 size_t alignment = GC::gc()->heap()->collector_policy()->space_alignment();
350 return (jlong)alignment;
351 WB_END
352
353 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
354 size_t alignment = GC::gc()->heap()->collector_policy()->heap_alignment();
355 return (jlong)alignment;
356 WB_END
357
358 #if INCLUDE_ALL_GCS
359 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
360 G1CollectedHeap* g1 = G1CollectedHeap::heap();
361 oop result = JNIHandles::resolve(obj);
362 const HeapRegion* hr = g1->heap_region_containing(result);
363 return hr->is_humongous();
364 WB_END
365
366 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
367 G1CollectedHeap* g1 = G1CollectedHeap::heap();
368 const HeapRegion* hr = g1->heap_region_containing((void*) addr);
369 return hr->is_humongous();
370 WB_END
371
372 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
373 G1CollectedHeap* g1 = G1CollectedHeap::heap();
374 const HeapRegion* hr = g1->heap_region_containing((void*) addr);
375 return hr->is_free();
376 WB_END
377
378 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
379 G1CollectedHeap* g1 = G1CollectedHeap::heap();
380 size_t nr = g1->max_regions();
381 return (jlong)nr;
382 WB_END
383
384 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
385 G1CollectedHeap* g1 = G1CollectedHeap::heap();
386 size_t nr = g1->num_free_regions();
387 return (jlong)nr;
388 WB_END
389
390 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
391 G1CollectedHeap* g1h = G1CollectedHeap::heap();
392 return g1h->concurrent_mark()->cmThread()->during_cycle();
393 WB_END
394
395 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
396 G1CollectedHeap* g1h = G1CollectedHeap::heap();
397 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
398 g1h->collect(GCCause::_wb_conc_mark);
399 return true;
400 }
401 return false;
402 WB_END
403
404 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
405 return (jint)HeapRegion::GrainBytes;
406 WB_END
407
408 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
409 #if INCLUDE_ALL_GCS
410 if (UseParallelGC) {
411 return ParallelScavengeHeap::heap()->gens()->virtual_spaces()->alignment();
412 }
413 #endif // INCLUDE_ALL_GCS
414 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "WB_PSVirtualSpaceAlignment: Parallel GC is not enabled");
415 WB_END
416
417 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
418 #if INCLUDE_ALL_GCS
419 if (UseParallelGC) {
420 return ParallelScavengeHeap::heap()->generation_alignment();
421 }
422 #endif // INCLUDE_ALL_GCS
423 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "WB_PSHeapGenerationAlignment: Parallel GC is not enabled");
424 WB_END
425
426 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
427 ResourceMark rm(THREAD);
428 G1CollectedHeap* g1h = G1CollectedHeap::heap();
429 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
430 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
431 return JNIHandles::make_local(env, h());
432 WB_END
433
434 class OldRegionsLivenessClosure: public HeapRegionClosure {
435
436 private:
437 const int _liveness;
438 size_t _total_count;
439 size_t _total_memory;
440 size_t _total_memory_to_free;
441
442 public:
443 OldRegionsLivenessClosure(int liveness) :
444 _liveness(liveness),
445 _total_count(0),
446 _total_memory(0),
447 _total_memory_to_free(0) { }
448
449 size_t total_count() { return _total_count; }
450 size_t total_memory() { return _total_memory; }
451 size_t total_memory_to_free() { return _total_memory_to_free; }
452
453 bool doHeapRegion(HeapRegion* r) {
454 if (r->is_old()) {
455 size_t prev_live = r->marked_bytes();
456 size_t live = r->live_bytes();
457 size_t size = r->used();
458 size_t reg_size = HeapRegion::GrainBytes;
459 if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
460 _total_memory += size;
461 ++_total_count;
462 if (size == reg_size) {
463 // we don't include non-full regions since they are unlikely included in mixed gc
464 // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
465 _total_memory_to_free += size - prev_live;
466 }
467 }
468 }
469 return false;
470 }
471 };
472
473
474 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
475 if (!UseG1GC) {
476 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "WB_G1GetMixedGCInfo: G1 is not enabled");
477 }
478 if (liveness < 0) {
479 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
480 }
481
482 G1CollectedHeap* g1h = G1CollectedHeap::heap();
483 OldRegionsLivenessClosure rli(liveness);
484 g1h->heap_region_iterate(&rli);
485
486 typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
487 result->long_at_put(0, rli.total_count());
488 result->long_at_put(1, rli.total_memory());
489 result->long_at_put(2, rli.total_memory_to_free());
490 return (jlongArray) JNIHandles::make_local(env, result);
491 WB_END
492
493
494
495 #endif // INCLUDE_ALL_GCS
496
497 #if INCLUDE_NMT
498 // Alloc memory using the test memory type so that we can use that to see if
499 // NMT picks it up correctly
500 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
501 jlong addr = 0;
502 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
503 return addr;
504 WB_END
505
506 // Alloc memory with pseudo call stack. The test can create psudo malloc
507 // allocation site to stress the malloc tracking.
508 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
509 address pc = (address)(size_t)pseudo_stack;
510 NativeCallStack stack(&pc, 1);
511 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
512 WB_END
513
514 // Free the memory allocated by NMTAllocTest
515 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
516 os::free((void*)(uintptr_t)mem);
517 WB_END
518
519 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
520 jlong addr = 0;
521
522 addr = (jlong)(uintptr_t)os::reserve_memory(size);
523 MemTracker::record_virtual_memory_type((address)addr, mtTest);
524
525 return addr;
526 WB_END
527
528 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
529 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
530 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
531 WB_END
532
533 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
534 os::uncommit_memory((char *)(uintptr_t)addr, size);
535 WB_END
536
537 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
538 os::release_memory((char *)(uintptr_t)addr, size);
539 WB_END
540
541 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
542 // Test that we can downgrade NMT levels but not upgrade them.
543 if (MemTracker::tracking_level() == NMT_off) {
544 MemTracker::transition_to(NMT_off);
545 return MemTracker::tracking_level() == NMT_off;
546 } else {
547 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
548 MemTracker::transition_to(NMT_summary);
549 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
550
551 // Can't go to detail once NMT is set to summary.
552 MemTracker::transition_to(NMT_detail);
553 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
554
555 // Shutdown sets tracking level to minimal.
556 MemTracker::shutdown();
557 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
558
559 // Once the tracking level is minimal, we cannot increase to summary.
560 // The code ignores this request instead of asserting because if the malloc site
561 // table overflows in another thread, it tries to change the code to summary.
562 MemTracker::transition_to(NMT_summary);
563 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
564
565 // Really can never go up to detail, verify that the code would never do this.
566 MemTracker::transition_to(NMT_detail);
567 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
568 return MemTracker::tracking_level() == NMT_minimal;
569 }
570 WB_END
571
572 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
573 int hash_size = MallocSiteTable::hash_buckets();
574 assert(hash_size > 0, "NMT hash_size should be > 0");
575 return (jint)hash_size;
576 WB_END
577 #endif // INCLUDE_NMT
578
579 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
580 assert(method != NULL, "method should not be null");
581 ThreadToNativeFromVM ttn(thread);
582 return env->FromReflectedMethod(method);
583 }
584
585 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
586 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
587 private:
588 int _result;
589 const bool _make_not_entrant;
590 public:
591 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
592 _result(0), _make_not_entrant(make_not_entrant) { }
593 int result() const { return _result; }
594
595 void doit() {
596 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
597 if (t->has_last_Java_frame()) {
598 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
599 frame* f = fst.current();
600 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
601 RegisterMap* reg_map = fst.register_map();
602 Deoptimization::deoptimize(t, *f, reg_map);
603 if (_make_not_entrant) {
604 CompiledMethod* cm = CodeCache::find_compiled(f->pc());
605 assert(cm != NULL, "sanity check");
606 cm->make_not_entrant();
607 }
608 ++_result;
609 }
610 }
611 }
612 }
613 }
614 };
615
616 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
617 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
618 VMThread::execute(&op);
619 return op.result();
620 WB_END
621
622 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
623 MutexLockerEx mu(Compile_lock);
624 CodeCache::mark_all_nmethods_for_deoptimization();
625 VM_Deoptimize op;
626 VMThread::execute(&op);
627 WB_END
628
629 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
630 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
631 int result = 0;
632 CHECK_JNI_EXCEPTION_(env, result);
633 MutexLockerEx mu(Compile_lock);
634 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
635 if (is_osr) {
636 result += mh->mark_osr_nmethods();
637 } else if (mh->code() != NULL) {
638 mh->code()->mark_for_deoptimization();
639 ++result;
640 }
641 result += CodeCache::mark_for_deoptimization(mh());
642 if (result > 0) {
643 VM_Deoptimize op;
644 VMThread::execute(&op);
645 }
646 return result;
647 WB_END
648
649 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
650 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
651 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
652 MutexLockerEx mu(Compile_lock);
653 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
654 CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
655 if (code == NULL) {
656 return JNI_FALSE;
657 }
658 return (code->is_alive() && !code->is_marked_for_deoptimization());
659 WB_END
660
661 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
662 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
663 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
664 MutexLockerEx mu(Compile_lock);
665 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
666 if (is_osr) {
667 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
668 } else {
669 return CompilationPolicy::can_be_compiled(mh, comp_level);
670 }
671 WB_END
672
673 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
674 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
675 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
676 MutexLockerEx mu(Compile_lock);
677 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
678 return mh->queued_for_compilation();
679 WB_END
680
681 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
682 if (compLevel < CompLevel_none || compLevel > CompLevel_highest_tier) {
683 return false; // Intrinsic is not available on a non-existent compilation level.
684 }
685 jmethodID method_id, compilation_context_id;
686 method_id = reflected_method_to_jmid(thread, env, method);
687 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
688 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
689
690 DirectiveSet* directive;
691 AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
692 if (compilation_context != NULL) {
693 compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
694 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
695 methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
696 directive = DirectivesStack::getMatchingDirective(cch, comp);
697 } else {
698 // Calling with NULL matches default directive
699 directive = DirectivesStack::getDefaultDirective(comp);
700 }
701 bool result = CompileBroker::compiler(compLevel)->is_intrinsic_available(mh, directive);
702 DirectivesStack::release(directive);
703 return result;
704 WB_END
705
706 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
707 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
708 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
709 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
710 CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
711 return (code != NULL ? code->comp_level() : CompLevel_none);
712 WB_END
713
714 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
715 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
716 CHECK_JNI_EXCEPTION(env);
717 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
718 if (is_osr) {
719 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
720 } else {
721 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
722 }
723 WB_END
724
725 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
726 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
727 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
728 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
729 CompiledMethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
730 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
731 WB_END
732
733 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
734 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
735 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
736 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
737 bool result = mh->dont_inline();
738 mh->set_dont_inline(value == JNI_TRUE);
739 return result;
740 WB_END
741
742 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
743 if (comp_level == CompLevel_any) {
744 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
745 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
746 } else {
747 return CompileBroker::queue_size(comp_level);
748 }
749 WB_END
750
751 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
752 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
753 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
754 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
755 bool result = mh->force_inline();
756 mh->set_force_inline(value == JNI_TRUE);
757 return result;
758 WB_END
759
760 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
761 // Screen for unavailable/bad comp level or null method
762 if (method == NULL || comp_level > TieredStopAtLevel ||
763 CompileBroker::compiler(comp_level) == NULL) {
764 return false;
765 }
766 methodHandle mh(THREAD, method);
767 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileTask::Reason_Whitebox, THREAD);
768 MutexLockerEx mu(Compile_lock);
769 return (mh->queued_for_compilation() || nm != NULL);
770 }
771
772 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
773 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
774 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
775 return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
776 WB_END
777
778 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
779 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
780 return WhiteBox::compile_method(ikh->class_initializer(), comp_level, InvocationEntryBci, THREAD);
781 WB_END
782
783 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
784 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
785 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
786
787 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
788 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
789 bool result = directive->PrintAssemblyOption;
790 DirectivesStack::release(directive);
791
792 return result;
793 WB_END
794
795 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
796 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
797 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
798
799 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
800
801 ResourceMark rm;
802 const char* error_msg = NULL;
803 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
804 InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
805
806 if (m == NULL) {
807 assert(error_msg != NULL, "Always have an error message");
808 tty->print_cr("Got error: %s", error_msg);
809 return -1; // Pattern failed
810 }
811
812 // Pattern works - now check if it matches
813 int result;
814 if (m->match(mh, InlineMatcher::force_inline)) {
815 result = 2; // Force inline match
816 } else if (m->match(mh, InlineMatcher::dont_inline)) {
817 result = 1; // Dont inline match
818 } else {
819 result = 0; // No match
820 }
821 delete m;
822 return result;
823 WB_END
824
825 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
826 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
827 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
828
829 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
830
831 ResourceMark rm;
832 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
833
834 const char* error_msg = NULL;
835
836 BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
837 if (m == NULL) {
838 assert(error_msg != NULL, "Must have error_msg");
839 tty->print_cr("Got error: %s", error_msg);
840 return -1;
841 }
842
843 // Pattern works - now check if it matches
844 int result = m->matches(mh);
845 delete m;
846 assert(result == 0 || result == 1, "Result out of range");
847 return result;
848 WB_END
849
850 static AlwaysFalseClosure always_false;
851
852 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
853 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
854 CHECK_JNI_EXCEPTION(env);
855 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
856 MutexLockerEx mu(Compile_lock);
857 MethodData* mdo = mh->method_data();
858 MethodCounters* mcs = mh->method_counters();
859
860 if (mdo != NULL) {
861 mdo->init();
862 ResourceMark rm;
863 int arg_count = mdo->method()->size_of_parameters();
864 for (int i = 0; i < arg_count; i++) {
865 mdo->set_arg_modified(i, 0);
866 }
867 MutexLockerEx mu(mdo->extra_data_lock());
868 mdo->clean_method_data(&always_false);
869 }
870
871 mh->clear_not_c1_compilable();
872 mh->clear_not_c2_compilable();
873 mh->clear_not_c2_osr_compilable();
874 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
875 if (mcs != NULL) {
876 mcs->backedge_counter()->init();
877 mcs->invocation_counter()->init();
878 mcs->set_interpreter_invocation_count(0);
879 mcs->set_interpreter_throwout_count(0);
880
881 #ifdef TIERED
882 mcs->set_rate(0.0F);
883 mh->set_prev_event_count(0);
884 mh->set_prev_time(0);
885 #endif
886 }
887 WB_END
888
889 template <typename T>
890 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
891 if (name == NULL) {
892 return false;
893 }
894 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
895 const char* flag_name = env->GetStringUTFChars(name, NULL);
896 Flag::Error result = (*TAt)(flag_name, value, true, true);
897 env->ReleaseStringUTFChars(name, flag_name);
898 return (result == Flag::SUCCESS);
899 }
900
901 template <typename T>
902 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
903 if (name == NULL) {
904 return false;
905 }
906 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
907 const char* flag_name = env->GetStringUTFChars(name, NULL);
908 Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
909 env->ReleaseStringUTFChars(name, flag_name);
910 return (result == Flag::SUCCESS);
911 }
912
913 template <typename T>
914 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
915 ResourceMark rm(thread);
916 jclass clazz = env->FindClass(name->as_C_string());
917 CHECK_JNI_EXCEPTION_(env, NULL);
918 jmethodID methodID = env->GetStaticMethodID(clazz,
919 vmSymbols::valueOf_name()->as_C_string(),
920 sig->as_C_string());
921 CHECK_JNI_EXCEPTION_(env, NULL);
922 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
923 CHECK_JNI_EXCEPTION_(env, NULL);
924 return result;
925 }
926
927 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
928 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
929 }
930 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
931 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
932 }
933 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
934 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
935 }
936 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
937 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
938 }*/
939 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
940 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
941 }
942
943 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
944 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
945 const char* flag_name = env->GetStringUTFChars(name, NULL);
946 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
947 env->ReleaseStringUTFChars(name, flag_name);
948 return result;
949 }
950
951 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
952 Flag* flag = getVMFlag(thread, env, name);
953 return (flag != NULL) && flag->is_constant_in_binary();
954 WB_END
955
956 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
957 Flag* flag = getVMFlag(thread, env, name);
958 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
959 WB_END
960
961 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
962 bool result;
963 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
964 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
965 return booleanBox(thread, env, result);
966 }
967 return NULL;
968 WB_END
969
970 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
971 int result;
972 if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
973 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
974 return longBox(thread, env, result);
975 }
976 return NULL;
977 WB_END
978
979 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
980 uint result;
981 if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
982 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
983 return longBox(thread, env, result);
984 }
985 return NULL;
986 WB_END
987
988 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
989 intx result;
990 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
991 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
992 return longBox(thread, env, result);
993 }
994 return NULL;
995 WB_END
996
997 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
998 uintx result;
999 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
1000 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1001 return longBox(thread, env, result);
1002 }
1003 return NULL;
1004 WB_END
1005
1006 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1007 uint64_t result;
1008 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
1009 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1010 return longBox(thread, env, result);
1011 }
1012 return NULL;
1013 WB_END
1014
1015 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1016 uintx result;
1017 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
1018 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1019 return longBox(thread, env, result);
1020 }
1021 return NULL;
1022 WB_END
1023
1024 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1025 double result;
1026 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
1027 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1028 return doubleBox(thread, env, result);
1029 }
1030 return NULL;
1031 WB_END
1032
1033 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1034 ccstr ccstrResult;
1035 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
1036 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1037 jstring result = env->NewStringUTF(ccstrResult);
1038 CHECK_JNI_EXCEPTION_(env, NULL);
1039 return result;
1040 }
1041 return NULL;
1042 WB_END
1043
1044 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1045 bool result = value == JNI_TRUE ? true : false;
1046 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
1047 WB_END
1048
1049 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1050 int result = value;
1051 SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
1052 WB_END
1053
1054 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1055 uint result = value;
1056 SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
1057 WB_END
1058
1059 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1060 intx result = value;
1061 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
1062 WB_END
1063
1064 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1065 uintx result = value;
1066 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
1067 WB_END
1068
1069 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1070 uint64_t result = value;
1071 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
1072 WB_END
1073
1074 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1075 size_t result = value;
1076 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
1077 WB_END
1078
1079 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1080 double result = value;
1081 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
1082 WB_END
1083
1084 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1085 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1086 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
1087 ccstr ccstrResult = ccstrValue;
1088 bool needFree;
1089 {
1090 ThreadInVMfromNative ttvfn(thread); // back to VM
1091 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
1092 }
1093 if (value != NULL) {
1094 env->ReleaseStringUTFChars(value, ccstrValue);
1095 }
1096 if (needFree) {
1097 FREE_C_HEAP_ARRAY(char, ccstrResult);
1098 }
1099 WB_END
1100
1101 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1102 WhiteBox::compilation_locked = true;
1103 WB_END
1104
1105 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1106 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1107 WhiteBox::compilation_locked = false;
1108 mo.notify_all();
1109 WB_END
1110
1111 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
1112 // Force a code cache sweep and block until it finished
1113 NMethodSweeper::force_sweep();
1114 WB_END
1115
1116 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1117 ResourceMark rm(THREAD);
1118 int len;
1119 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1120 return (StringTable::lookup(name, len) != NULL);
1121 WB_END
1122
1123 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1124 GC::gc()->heap()->collector_policy()->set_should_clear_all_soft_refs(true);
1125 GC::gc()->heap()->collect(GCCause::_wb_full_gc);
1126 #if INCLUDE_ALL_GCS
1127 if (UseG1GC) {
1128 // Needs to be cleared explicitly for G1
1129 GC::gc()->heap()->collector_policy()->set_should_clear_all_soft_refs(false);
1130 }
1131 #endif // INCLUDE_ALL_GCS
1132 WB_END
1133
1134 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1135 GC::gc()->heap()->collect(GCCause::_wb_young_gc);
1136 WB_END
1137
1138 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1139 // static+volatile in order to force the read to happen
1140 // (not be eliminated by the compiler)
1141 static char c;
1142 static volatile char* p;
1143
1144 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1145 if (p == NULL) {
1146 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1147 }
1148
1149 c = *p;
1150 WB_END
1151
1152 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1153 const char* features = VM_Version::features_string();
1154 ThreadToNativeFromVM ttn(thread);
1155 jstring features_string = env->NewStringUTF(features);
1156
1157 CHECK_JNI_EXCEPTION_(env, NULL);
1158
1159 return features_string;
1160 WB_END
1161
1162 int WhiteBox::get_blob_type(const CodeBlob* code) {
1163 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1164 return CodeCache::get_code_heap(code)->code_blob_type();
1165 }
1166
1167 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1168 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1169 return CodeCache::get_code_heap(blob_type);
1170 }
1171
1172 struct CodeBlobStub {
1173 CodeBlobStub(const CodeBlob* blob) :
1174 name(os::strdup(blob->name())),
1175 size(blob->size()),
1176 blob_type(WhiteBox::get_blob_type(blob)),
1177 address((jlong) blob) { }
1178 ~CodeBlobStub() { os::free((void*) name); }
1179 const char* const name;
1180 const jint size;
1181 const jint blob_type;
1182 const jlong address;
1183 };
1184
1185 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1186 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1187 CHECK_JNI_EXCEPTION_(env, NULL);
1188 jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1189
1190 jstring name = env->NewStringUTF(cb->name);
1191 CHECK_JNI_EXCEPTION_(env, NULL);
1192 env->SetObjectArrayElement(result, 0, name);
1193
1194 jobject obj = integerBox(thread, env, cb->size);
1195 CHECK_JNI_EXCEPTION_(env, NULL);
1196 env->SetObjectArrayElement(result, 1, obj);
1197
1198 obj = integerBox(thread, env, cb->blob_type);
1199 CHECK_JNI_EXCEPTION_(env, NULL);
1200 env->SetObjectArrayElement(result, 2, obj);
1201
1202 obj = longBox(thread, env, cb->address);
1203 CHECK_JNI_EXCEPTION_(env, NULL);
1204 env->SetObjectArrayElement(result, 3, obj);
1205
1206 return result;
1207 }
1208
1209 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1210 ResourceMark rm(THREAD);
1211 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1212 CHECK_JNI_EXCEPTION_(env, NULL);
1213 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1214 CompiledMethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1215 jobjectArray result = NULL;
1216 if (code == NULL) {
1217 return result;
1218 }
1219 int insts_size = code->insts_size();
1220
1221 ThreadToNativeFromVM ttn(thread);
1222 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1223 CHECK_JNI_EXCEPTION_(env, NULL);
1224 result = env->NewObjectArray(5, clazz, NULL);
1225 if (result == NULL) {
1226 return result;
1227 }
1228
1229 CodeBlobStub stub(code);
1230 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1231 CHECK_JNI_EXCEPTION_(env, NULL);
1232 env->SetObjectArrayElement(result, 0, codeBlob);
1233
1234 jobject level = integerBox(thread, env, code->comp_level());
1235 CHECK_JNI_EXCEPTION_(env, NULL);
1236 env->SetObjectArrayElement(result, 1, level);
1237
1238 jbyteArray insts = env->NewByteArray(insts_size);
1239 CHECK_JNI_EXCEPTION_(env, NULL);
1240 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1241 env->SetObjectArrayElement(result, 2, insts);
1242
1243 jobject id = integerBox(thread, env, code->compile_id());
1244 CHECK_JNI_EXCEPTION_(env, NULL);
1245 env->SetObjectArrayElement(result, 3, id);
1246
1247 jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1248 CHECK_JNI_EXCEPTION_(env, NULL);
1249 env->SetObjectArrayElement(result, 4, entry_point);
1250
1251 return result;
1252 WB_END
1253
1254 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1255 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1256 BufferBlob* blob;
1257 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1258 if (full_size < size) {
1259 full_size += round_to(size - full_size, oopSize);
1260 }
1261 {
1262 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1263 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1264 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1265 }
1266 // Track memory usage statistic after releasing CodeCache_lock
1267 MemoryService::track_code_cache_memory_usage();
1268 return blob;
1269 }
1270
1271 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1272 if (size < 0) {
1273 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1274 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1275 }
1276 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1277 WB_END
1278
1279 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1280 if (addr == 0) {
1281 return;
1282 }
1283 BufferBlob::free((BufferBlob*) addr);
1284 WB_END
1285
1286 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1287 ResourceMark rm;
1288 GrowableArray<CodeBlobStub*> blobs;
1289 {
1290 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1291 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1292 if (heap == NULL) {
1293 return NULL;
1294 }
1295 for (CodeBlob* cb = (CodeBlob*) heap->first();
1296 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1297 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1298 new (stub) CodeBlobStub(cb);
1299 blobs.append(stub);
1300 }
1301 }
1302 if (blobs.length() == 0) {
1303 return NULL;
1304 }
1305 ThreadToNativeFromVM ttn(thread);
1306 jobjectArray result = NULL;
1307 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1308 CHECK_JNI_EXCEPTION_(env, NULL);
1309 result = env->NewObjectArray(blobs.length(), clazz, NULL);
1310 if (result == NULL) {
1311 return result;
1312 }
1313 int i = 0;
1314 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1315 it != blobs.end(); ++it) {
1316 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1317 CHECK_JNI_EXCEPTION_(env, NULL);
1318 env->SetObjectArrayElement(result, i, obj);
1319 ++i;
1320 }
1321 return result;
1322 WB_END
1323
1324 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1325 return CompileBroker::get_compilation_activity_mode();
1326 WB_END
1327
1328 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1329 if (addr == 0) {
1330 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1331 "WB_GetCodeBlob: addr is null");
1332 }
1333 ThreadToNativeFromVM ttn(thread);
1334 CodeBlobStub stub((CodeBlob*) addr);
1335 return codeBlob2objectArray(thread, env, &stub);
1336 WB_END
1337
1338 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1339 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1340 CHECK_JNI_EXCEPTION_(env, 0);
1341 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1342 return (jlong) mh->method_data();
1343 WB_END
1344
1345 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1346 return (jlong) Thread::current()->stack_size();
1347 WB_END
1348
1349 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1350 JavaThread* t = JavaThread::current();
1351 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1352 WB_END
1353
1354
1355 int WhiteBox::array_bytes_to_length(size_t bytes) {
1356 return Array<u1>::bytes_to_length(bytes);
1357 }
1358
1359 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1360 if (size < 0) {
1361 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1362 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1363 }
1364
1365 oop class_loader_oop = JNIHandles::resolve(class_loader);
1366 ClassLoaderData* cld = class_loader_oop != NULL
1367 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1368 : ClassLoaderData::the_null_class_loader_data();
1369
1370 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1371
1372 return (jlong)(uintptr_t)metadata;
1373 WB_END
1374
1375 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1376 oop class_loader_oop = JNIHandles::resolve(class_loader);
1377 ClassLoaderData* cld = class_loader_oop != NULL
1378 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1379 : ClassLoaderData::the_null_class_loader_data();
1380
1381 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1382 WB_END
1383
1384 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jstring version, jstring location,
1385 jobjectArray packages))
1386 Modules::define_module(module, version, location, packages, CHECK);
1387 WB_END
1388
1389 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1390 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1391 WB_END
1392
1393 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1394 Modules::add_module_exports_to_all_unnamed(module, package, CHECK);
1395 WB_END
1396
1397 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1398 Modules::add_module_exports(module, package, NULL, CHECK);
1399 WB_END
1400
1401 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1402 Modules::add_reads_module(from_module, source_module, CHECK);
1403 WB_END
1404
1405 WB_ENTRY(jboolean, WB_CanReadModule(JNIEnv* env, jobject o, jobject asking_module, jobject source_module))
1406 return Modules::can_read_module(asking_module, source_module, THREAD);
1407 WB_END
1408
1409 WB_ENTRY(jboolean, WB_IsExportedToModule(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1410 return Modules::is_exported_to_module(from_module, package, to_module, THREAD);
1411 WB_END
1412
1413 WB_ENTRY(void, WB_AddModulePackage(JNIEnv* env, jobject o, jclass module, jstring package))
1414 Modules::add_module_package(module, package, CHECK);
1415 WB_END
1416
1417 WB_ENTRY(jobject, WB_GetModuleByPackageName(JNIEnv* env, jobject o, jobject loader, jstring package))
1418 return Modules::get_module_by_package_name(loader, package, THREAD);
1419 WB_END
1420
1421 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1422 if (inc < 0) {
1423 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1424 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1425 }
1426
1427 jlong max_size_t = (jlong) ((size_t) -1);
1428 if (inc > max_size_t) {
1429 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1430 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1431 }
1432
1433 size_t new_cap_until_GC = 0;
1434 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1435 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1436 if (!success) {
1437 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1438 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1439 "due to contention with another thread");
1440 }
1441 return (jlong) new_cap_until_GC;
1442 WB_END
1443
1444 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1445 return (jlong) MetaspaceGC::capacity_until_GC();
1446 WB_END
1447
1448 WB_ENTRY(jboolean, WB_MetaspaceShouldConcurrentCollect(JNIEnv* env, jobject wb))
1449 return MetaspaceGC::should_concurrent_collect();
1450 WB_END
1451
1452
1453 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1454 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1455 Monitor::_safepoint_check_always :
1456 Monitor::_safepoint_check_never;
1457 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1458 attemptedNoSafepointValue == JNI_TRUE);
1459 WB_END
1460
1461 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1462 oop obj_oop = JNIHandles::resolve(obj);
1463 return (jboolean) obj_oop->mark()->has_monitor();
1464 WB_END
1465
1466 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1467 VM_ForceSafepoint force_safepoint_op;
1468 VMThread::execute(&force_safepoint_op);
1469 WB_END
1470
1471 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1472 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1473 return (jlong) ikh->constants();
1474 WB_END
1475
1476 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1477 return ConstantPool::CPCACHE_INDEX_TAG;
1478 WB_END
1479
1480 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1481 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1482 ConstantPool* cp = ikh->constants();
1483 if (cp->cache() == NULL) {
1484 return -1;
1485 }
1486 return cp->cache()->length();
1487 WB_END
1488
1489 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1490 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1491 ConstantPool* cp = ikh->constants();
1492 if (cp->cache() == NULL) {
1493 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1494 }
1495 jint cpci = index;
1496 jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1497 if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1498 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1499 }
1500 jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1501 return cpi;
1502 WB_END
1503
1504 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1505 return ConstantPool::encode_invokedynamic_index(index);
1506 WB_END
1507
1508 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1509 VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1510 VMThread::execute(&clear_ics);
1511 WB_END
1512
1513 template <typename T>
1514 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1515 assert(value != NULL, "sanity");
1516 if (method == NULL || name == NULL) {
1517 return false;
1518 }
1519 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1520 CHECK_JNI_EXCEPTION_(env, false);
1521 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1522 // can't be in VM when we call JNI
1523 ThreadToNativeFromVM ttnfv(thread);
1524 const char* flag_name = env->GetStringUTFChars(name, NULL);
1525 bool result = CompilerOracle::has_option_value(mh, flag_name, *value);
1526 env->ReleaseStringUTFChars(name, flag_name);
1527 return result;
1528 }
1529
1530 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1531 bool result;
1532 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1533 // can't be in VM when we call JNI
1534 ThreadToNativeFromVM ttnfv(thread);
1535 return booleanBox(thread, env, result);
1536 }
1537 return NULL;
1538 WB_END
1539
1540 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1541 intx result;
1542 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1543 // can't be in VM when we call JNI
1544 ThreadToNativeFromVM ttnfv(thread);
1545 return longBox(thread, env, result);
1546 }
1547 return NULL;
1548 WB_END
1549
1550 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1551 uintx result;
1552 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1553 // can't be in VM when we call JNI
1554 ThreadToNativeFromVM ttnfv(thread);
1555 return longBox(thread, env, result);
1556 }
1557 return NULL;
1558 WB_END
1559
1560 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1561 double result;
1562 if (GetMethodOption <double> (thread, env, method, name, &result)) {
1563 // can't be in VM when we call JNI
1564 ThreadToNativeFromVM ttnfv(thread);
1565 return doubleBox(thread, env, result);
1566 }
1567 return NULL;
1568 WB_END
1569
1570 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1571 ccstr ccstrResult;
1572 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1573 // can't be in VM when we call JNI
1574 ThreadToNativeFromVM ttnfv(thread);
1575 jstring result = env->NewStringUTF(ccstrResult);
1576 CHECK_JNI_EXCEPTION_(env, NULL);
1577 return result;
1578 }
1579 return NULL;
1580 WB_END
1581
1582 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1583 oop obj_oop = JNIHandles::resolve(obj);
1584 return MetaspaceShared::is_in_shared_space((void*)obj_oop);
1585 WB_END
1586
1587 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1588 return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1589 WB_END
1590
1591 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1592 return StringTable::shared_string_ignored();
1593 WB_END
1594
1595 //Some convenience methods to deal with objects from java
1596 int WhiteBox::offset_for_field(const char* field_name, oop object,
1597 Symbol* signature_symbol) {
1598 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1599 Thread* THREAD = Thread::current();
1600
1601 //Get the class of our object
1602 Klass* arg_klass = object->klass();
1603 //Turn it into an instance-klass
1604 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1605
1606 //Create symbols to look for in the class
1607 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1608 THREAD);
1609
1610 //To be filled in with an offset of the field we're looking for
1611 fieldDescriptor fd;
1612
1613 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1614 if (res == NULL) {
1615 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1616 name_symbol->as_C_string());
1617 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
1618 }
1619
1620 //fetch the field at the offset we've found
1621 int dest_offset = fd.offset();
1622
1623 return dest_offset;
1624 }
1625
1626
1627 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1628 int offset = offset_for_field(field_name, object,
1629 vmSymbols::string_signature());
1630 oop string = object->obj_field(offset);
1631 if (string == NULL) {
1632 return NULL;
1633 }
1634 const char* ret = java_lang_String::as_utf8_string(string);
1635 return ret;
1636 }
1637
1638 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1639 int offset =
1640 offset_for_field(field_name, object, vmSymbols::bool_signature());
1641 bool ret = (object->bool_field(offset) == JNI_TRUE);
1642 return ret;
1643 }
1644
1645 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1646 ResourceMark rm;
1647 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1648
1649 // one by one registration natives for exception catching
1650 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1651 CHECK_JNI_EXCEPTION(env);
1652 for (int i = 0, n = method_count; i < n; ++i) {
1653 // Skip dummy entries
1654 if (method_array[i].fnPtr == NULL) continue;
1655 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1656 jthrowable throwable_obj = env->ExceptionOccurred();
1657 if (throwable_obj != NULL) {
1658 env->ExceptionClear();
1659 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1660 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1661 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1662 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1663 method_array[i].name, method_array[i].signature);
1664 }
1665 } else {
1666 // Registration failed unexpectedly.
1667 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1668 method_array[i].name, method_array[i].signature);
1669 env->UnregisterNatives(wbclass);
1670 break;
1671 }
1672 }
1673 }
1674 }
1675
1676 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
1677 // can't be in VM when we call JNI
1678 ThreadToNativeFromVM ttnfv(thread);
1679 const char* dir = env->GetStringUTFChars(compDirect, NULL);
1680 int ret;
1681 {
1682 ThreadInVMfromNative ttvfn(thread); // back to VM
1683 ret = DirectivesParser::parse_string(dir, tty);
1684 }
1685 env->ReleaseStringUTFChars(compDirect, dir);
1686 // -1 for error parsing directive. Return 0 as number of directives added.
1687 if (ret == -1) {
1688 ret = 0;
1689 }
1690 return (jint) ret;
1691 WB_END
1692
1693 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
1694 DirectivesStack::pop(count);
1695 WB_END
1696
1697 #define CC (char*)
1698
1699 static JNINativeMethod methods[] = {
1700 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1701 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1702 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1703 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1704 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1705 {CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
1706 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
1707 {CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
1708 {CC"getHeapAlignment", CC"()J", (void*)&WB_GetHeapAlignment},
1709 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1710 {CC"parseCommandLine0",
1711 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1712 (void*) &WB_ParseCommandLine
1713 },
1714 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1715 (void*)&WB_AddToBootstrapClassLoaderSearch},
1716 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1717 (void*)&WB_AddToSystemClassLoaderSearch},
1718 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1719 (void*)&WB_GetCompressedOopsMaxHeapSize},
1720 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1721 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1722 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1723 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1724 #if INCLUDE_ALL_GCS
1725 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1726 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1727 {CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
1728 {CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
1729 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
1730 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1731 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1732 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1733 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1734 (void*)&WB_G1AuxiliaryMemoryUsage },
1735 {CC"psVirtualSpaceAlignment",CC"()J", (void*)&WB_PSVirtualSpaceAlignment},
1736 {CC"psHeapGenerationAlignment",CC"()J", (void*)&WB_PSHeapGenerationAlignment},
1737 {CC"g1GetMixedGCInfo", CC"(I)[J", (void*)&WB_G1GetMixedGCInfo },
1738 #endif // INCLUDE_ALL_GCS
1739 #if INCLUDE_NMT
1740 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1741 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1742 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1743 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1744 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1745 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1746 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1747 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1748 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1749 #endif // INCLUDE_NMT
1750 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
1751 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1752 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
1753 (void*)&WB_DeoptimizeMethod },
1754 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
1755 (void*)&WB_IsMethodCompiled },
1756 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1757 (void*)&WB_IsMethodCompilable},
1758 {CC"isMethodQueuedForCompilation0",
1759 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1760 {CC"isIntrinsicAvailable0",
1761 CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1762 (void*)&WB_IsIntrinsicAvailable},
1763 {CC"makeMethodNotCompilable0",
1764 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1765 {CC"testSetDontInlineMethod0",
1766 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1767 {CC"getMethodCompilationLevel0",
1768 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1769 {CC"getMethodEntryBci0",
1770 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1771 {CC"getCompileQueueSize",
1772 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1773 {CC"testSetForceInlineMethod0",
1774 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1775 {CC"enqueueMethodForCompilation0",
1776 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1777 {CC"enqueueInitializerForCompilation0",
1778 CC"(Ljava/lang/Class;I)Z", (void*)&WB_EnqueueInitializerForCompilation},
1779 {CC"clearMethodState0",
1780 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1781 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1782 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1783 {CC"matchesMethod",
1784 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1785 (void*)&WB_MatchesMethod},
1786 {CC"matchesInline",
1787 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1788 (void*)&WB_MatchesInline},
1789 {CC"shouldPrintAssembly",
1790 CC"(Ljava/lang/reflect/Executable;I)Z",
1791 (void*)&WB_ShouldPrintAssembly},
1792
1793 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1794 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1795 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1796 {CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1797 {CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1798 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1799 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1800 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1801 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1802 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1803 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1804 (void*)&WB_SetStringVMFlag},
1805 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1806 (void*)&WB_GetBooleanVMFlag},
1807 {CC"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1808 (void*)&WB_GetIntVMFlag},
1809 {CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1810 (void*)&WB_GetUintVMFlag},
1811 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1812 (void*)&WB_GetIntxVMFlag},
1813 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1814 (void*)&WB_GetUintxVMFlag},
1815 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1816 (void*)&WB_GetUint64VMFlag},
1817 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1818 (void*)&WB_GetSizeTVMFlag},
1819 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1820 (void*)&WB_GetDoubleVMFlag},
1821 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1822 (void*)&WB_GetStringVMFlag},
1823 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1824 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1825 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1826 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1827 {CC"allocateMetaspace",
1828 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1829 {CC"freeMetaspace",
1830 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1831 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1832 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1833 {CC"metaspaceShouldConcurrentCollect", CC"()Z", (void*)&WB_MetaspaceShouldConcurrentCollect },
1834 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1835 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1836 (void*)&WB_GetNMethod },
1837 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
1838 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1839 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1840 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1841 {CC"getCompilationActivityMode",
1842 CC"()I", (void*)&WB_GetCompilationActivityMode},
1843 {CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
1844 (void*)&WB_GetMethodData },
1845 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1846 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1847 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1848 {CC"DefineModule", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
1849 (void*)&WB_DefineModule },
1850 {CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
1851 (void*)&WB_AddModuleExports },
1852 {CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
1853 (void*)&WB_AddReadsModule },
1854 {CC"CanReadModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)Z",
1855 (void*)&WB_CanReadModule },
1856 {CC"IsExportedToModule", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Z",
1857 (void*)&WB_IsExportedToModule },
1858 {CC"AddModulePackage", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1859 (void*)&WB_AddModulePackage },
1860 {CC"GetModuleByPackageName", CC"(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;",
1861 (void*)&WB_GetModuleByPackageName },
1862 {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1863 (void*)&WB_AddModuleExportsToAllUnnamed },
1864 {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1865 (void*)&WB_AddModuleExportsToAll },
1866 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
1867 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1868 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1869 {CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
1870 {CC"getConstantPoolCacheIndexTag0", CC"()I", (void*)&WB_GetConstantPoolCacheIndexTag},
1871 {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_GetConstantPoolCacheLength},
1872 {CC"remapInstructionOperandFromCPCache0",
1873 CC"(Ljava/lang/Class;I)I", (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
1874 {CC"encodeConstantPoolIndyIndex0",
1875 CC"(I)I", (void*)&WB_ConstantPoolEncodeIndyIndex},
1876 {CC"getMethodBooleanOption",
1877 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1878 (void*)&WB_GetMethodBooleaneOption},
1879 {CC"getMethodIntxOption",
1880 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1881 (void*)&WB_GetMethodIntxOption},
1882 {CC"getMethodUintxOption",
1883 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1884 (void*)&WB_GetMethodUintxOption},
1885 {CC"getMethodDoubleOption",
1886 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1887 (void*)&WB_GetMethodDoubleOption},
1888 {CC"getMethodStringOption",
1889 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1890 (void*)&WB_GetMethodStringOption},
1891 {CC"isShared", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
1892 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
1893 {CC"areSharedStringsIgnored", CC"()Z", (void*)&WB_AreSharedStringsIgnored },
1894 {CC"clearInlineCaches0", CC"(Z)V", (void*)&WB_ClearInlineCaches },
1895 {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
1896 (void*)&WB_AddCompilerDirective },
1897 {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
1898 {CC"currentGC", CC"()I", (void*)&WB_CurrentGC},
1899 {CC"allSupportedGC", CC"()I", (void*)&WB_AllSupportedGC},
1900 {CC"gcSelectedByErgo", CC"()Z", (void*)&WB_GCSelectedByErgo},
1901 };
1902
1903 #undef CC
1904
1905 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1906 {
1907 if (WhiteBoxAPI) {
1908 // Make sure that wbclass is loaded by the null classloader
1909 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1910 Handle loader(ikh->class_loader());
1911 if (loader.is_null()) {
1912 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1913 WhiteBox::register_extended(env, wbclass, thread);
1914 WhiteBox::set_used();
1915 }
1916 }
1917 }
1918 JVM_END