1 /*
2 * Copyright (c) 2012, 2015, 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/stringTable.hpp"
31 #include "code/codeCache.hpp"
32 #include "jvmtifiles/jvmtiEnv.hpp"
33 #include "memory/metadataFactory.hpp"
34 #include "memory/universe.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "prims/wbtestmethods/parserTests.hpp"
37 #include "prims/whitebox.hpp"
38 #include "runtime/arguments.hpp"
39 #include "runtime/compilationPolicy.hpp"
40 #include "runtime/deoptimization.hpp"
41 #include "runtime/interfaceSupport.hpp"
42 #include "runtime/os.hpp"
43 #include "runtime/sweeper.hpp"
44 #include "runtime/javaCalls.hpp"
45 #include "runtime/thread.hpp"
46 #include "runtime/vm_version.hpp"
47 #include "utilities/array.hpp"
48 #include "utilities/debug.hpp"
49 #include "utilities/exceptions.hpp"
50 #include "utilities/macros.hpp"
51 #if INCLUDE_ALL_GCS
52 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
53 #include "gc_implementation/g1/concurrentMark.hpp"
54 #include "gc_implementation/g1/concurrentMarkThread.hpp"
55 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
56 #include "gc_implementation/g1/heapRegionRemSet.hpp"
57 #endif // INCLUDE_ALL_GCS
58 #if INCLUDE_NMT
59 #include "services/mallocSiteTable.hpp"
60 #include "services/memTracker.hpp"
61 #include "utilities/nativeCallStack.hpp"
62 #endif // INCLUDE_NMT
63
64
65 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
66
67 #define SIZE_T_MAX_VALUE ((size_t) -1)
68
69 bool WhiteBox::_used = false;
70 volatile bool WhiteBox::compilation_locked = false;
71
72 class VM_WhiteBoxOperation : public VM_Operation {
73 public:
74 VM_WhiteBoxOperation() { }
75 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
76 bool allow_nested_vm_operations() const { return true; }
77 };
78
79
80 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
81 return (jlong)(void*)JNIHandles::resolve(obj);
82 WB_END
83
84 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
85 return heapOopSize;
86 WB_END
87
88 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
89 return os::vm_page_size();
90 WB_END
91
92 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
93 return os::large_page_size();
94 WB_END
95
96 class WBIsKlassAliveClosure : public KlassClosure {
97 Symbol* _name;
98 bool _found;
99 public:
100 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
101
102 void do_klass(Klass* k) {
103 if (_found) return;
104 Symbol* ksym = k->name();
105 if (ksym->fast_compare(_name) == 0) {
106 _found = true;
107 }
108 }
109
110 bool found() const {
111 return _found;
112 }
113 };
114
115 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
116 Handle h_name = JNIHandles::resolve(name);
117 if (h_name.is_null()) return false;
118 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
119 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
120
121 WBIsKlassAliveClosure closure(sym);
122 ClassLoaderDataGraph::classes_do(&closure);
123
124 return closure.found();
125 WB_END
126
127 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
128 #if INCLUDE_JVMTI
129 ResourceMark rm;
130 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
131 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
132 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
133 assert(err == JVMTI_ERROR_NONE, "must not fail");
134 #endif
135 }
136 WB_END
137
138 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(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->AddToSystemClassLoaderSearch(seg);
144 assert(err == JVMTI_ERROR_NONE, "must not fail");
145 #endif
146 }
147 WB_END
148
149
150 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
151 return (jlong)Arguments::max_heap_for_compressed_oops();
152 }
153 WB_END
154
155 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
156 CollectorPolicy * p = Universe::heap()->collector_policy();
157 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
158 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
159 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
160 p->space_alignment(), p->heap_alignment());
161 }
162 WB_END
163
164 #ifndef PRODUCT
165 // Forward declaration
166 void TestReservedSpace_test();
167 void TestReserveMemorySpecial_test();
168 void TestVirtualSpace_test();
169 void TestMetaspaceAux_test();
170 #endif
171
172 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
173 #ifndef PRODUCT
174 TestReservedSpace_test();
175 TestReserveMemorySpecial_test();
176 TestVirtualSpace_test();
177 TestMetaspaceAux_test();
178 #endif
179 WB_END
180
181 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
182 size_t granularity = os::vm_allocation_granularity();
183 ReservedHeapSpace rhs(100 * granularity, granularity, false);
184 VirtualSpace vs;
185 vs.initialize(rhs, 50 * granularity);
186
187 // Check if constraints are complied
188 if (!( UseCompressedOops && rhs.base() != NULL &&
189 Universe::narrow_oop_base() != NULL &&
190 Universe::narrow_oop_use_implicit_null_checks() )) {
191 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
192 "\tUseCompressedOops is %d\n"
193 "\trhs.base() is "PTR_FORMAT"\n"
194 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
195 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
196 UseCompressedOops,
197 rhs.base(),
198 Universe::narrow_oop_base(),
199 Universe::narrow_oop_use_implicit_null_checks());
200 return;
201 }
202 tty->print_cr("Reading from no access area... ");
203 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
204 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
205 WB_END
206
207 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
208 size_t magnitude, size_t iterations) {
209 size_t granularity = os::vm_allocation_granularity();
210 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
211 VirtualSpace vs;
212 if (!vs.initialize(rhs, 0)) {
213 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
214 return 3;
215 }
216
217 long seed = os::random();
218 tty->print_cr("Random seed is %ld", seed);
219 os::init_random(seed);
220
221 for (size_t i = 0; i < iterations; i++) {
222
223 // Whether we will shrink or grow
224 bool shrink = os::random() % 2L == 0;
225
226 // Get random delta to resize virtual space
227 size_t delta = (size_t)os::random() % magnitude;
228
229 // If we are about to shrink virtual space below zero, then expand instead
230 if (shrink && vs.committed_size() < delta) {
231 shrink = false;
232 }
233
234 // Resizing by delta
235 if (shrink) {
236 vs.shrink_by(delta);
237 } else {
238 // If expanding fails expand_by will silently return false
239 vs.expand_by(delta, true);
240 }
241 }
242 return 0;
243 }
244
245 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
246 jlong reserved_space_size, jlong magnitude, jlong iterations))
247 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
248 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
249 iterations);
250 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
251 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
252 return 1;
253 }
254
255 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
256 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
257 if (sizeof(size_t) < sizeof(jlong)) {
258 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
259 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
260 || iterations > size_t_max_value) {
261 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
262 return 2;
263 }
264 }
265
266 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
267 (size_t) magnitude, (size_t) iterations);
268 WB_END
269
270 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
271 oop p = JNIHandles::resolve(obj);
272 #if INCLUDE_ALL_GCS
273 if (UseG1GC) {
274 G1CollectedHeap* g1 = G1CollectedHeap::heap();
275 const HeapRegion* hr = g1->heap_region_containing(p);
276 if (hr == NULL) {
277 return false;
278 }
279 return !(hr->is_young());
280 } else if (UseParallelGC) {
281 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
282 return !psh->is_in_young(p);
283 }
284 #endif // INCLUDE_ALL_GCS
285 GenCollectedHeap* gch = GenCollectedHeap::heap();
286 return !gch->is_in_young(p);
287 WB_END
288
289 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
290 oop p = JNIHandles::resolve(obj);
291 return p->size() * HeapWordSize;
292 WB_END
293
294 #if INCLUDE_ALL_GCS
295 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
296 G1CollectedHeap* g1 = G1CollectedHeap::heap();
297 oop result = JNIHandles::resolve(obj);
298 const HeapRegion* hr = g1->heap_region_containing(result);
299 return hr->is_humongous();
300 WB_END
301
302 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
303 G1CollectedHeap* g1 = G1CollectedHeap::heap();
304 size_t nr = g1->max_regions();
305 return (jlong)nr;
306 WB_END
307
308 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
309 G1CollectedHeap* g1 = G1CollectedHeap::heap();
310 size_t nr = g1->num_free_regions();
311 return (jlong)nr;
312 WB_END
313
314 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
315 G1CollectedHeap* g1 = G1CollectedHeap::heap();
316 return g1->concurrent_mark()->cmThread()->during_cycle();
317 WB_END
318
319 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
320 G1CollectedHeap* g1h = G1CollectedHeap::heap();
321 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
322 g1h->collect(GCCause::_wb_conc_mark);
323 return true;
324 }
325 return false;
326 WB_END
327
328 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
329 return (jint)HeapRegion::GrainBytes;
330 WB_END
331
332 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
333 ResourceMark rm(THREAD);
334 G1CollectedHeap* g1h = G1CollectedHeap::heap();
335 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
336 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
337 return JNIHandles::make_local(env, h());
338 WB_END
339 #endif // INCLUDE_ALL_GCS
340
341 #if INCLUDE_NMT
342 // Alloc memory using the test memory type so that we can use that to see if
343 // NMT picks it up correctly
344 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
345 jlong addr = 0;
346 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
347 return addr;
348 WB_END
349
350 // Alloc memory with pseudo call stack. The test can create psudo malloc
351 // allocation site to stress the malloc tracking.
352 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
353 address pc = (address)(size_t)pseudo_stack;
354 NativeCallStack stack(&pc, 1);
355 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
356 WB_END
357
358 // Free the memory allocated by NMTAllocTest
359 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
360 os::free((void*)(uintptr_t)mem);
361 WB_END
362
363 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
364 jlong addr = 0;
365
366 addr = (jlong)(uintptr_t)os::reserve_memory(size);
367 MemTracker::record_virtual_memory_type((address)addr, mtTest);
368
369 return addr;
370 WB_END
371
372 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
373 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
374 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
375 WB_END
376
377 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
378 os::uncommit_memory((char *)(uintptr_t)addr, size);
379 WB_END
380
381 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
382 os::release_memory((char *)(uintptr_t)addr, size);
383 WB_END
384
385 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
386 return MemTracker::tracking_level() == NMT_detail;
387 WB_END
388
389 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
390 // Test that we can downgrade NMT levels but not upgrade them.
391 if (MemTracker::tracking_level() == NMT_off) {
392 MemTracker::transition_to(NMT_off);
393 return MemTracker::tracking_level() == NMT_off;
394 } else {
395 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
396 MemTracker::transition_to(NMT_summary);
397 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
398
399 // Can't go to detail once NMT is set to summary.
400 MemTracker::transition_to(NMT_detail);
401 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
402
403 // Shutdown sets tracking level to minimal.
404 MemTracker::shutdown();
405 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
406
407 // Once the tracking level is minimal, we cannot increase to summary.
408 // The code ignores this request instead of asserting because if the malloc site
409 // table overflows in another thread, it tries to change the code to summary.
410 MemTracker::transition_to(NMT_summary);
411 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
412
413 // Really can never go up to detail, verify that the code would never do this.
414 MemTracker::transition_to(NMT_detail);
415 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
416 return MemTracker::tracking_level() == NMT_minimal;
417 }
418 WB_END
419
420 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
421 int hash_size = MallocSiteTable::hash_buckets();
422 assert(hash_size > 0, "NMT hash_size should be > 0");
423 return (jint)hash_size;
424 WB_END
425 #endif // INCLUDE_NMT
426
427 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
428 assert(method != NULL, "method should not be null");
429 ThreadToNativeFromVM ttn(thread);
430 return env->FromReflectedMethod(method);
431 }
432
433 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
434 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
435 private:
436 int _result;
437 const bool _make_not_entrant;
438 public:
439 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
440 _result(0), _make_not_entrant(make_not_entrant) { }
441 int result() const { return _result; }
442
443 void doit() {
444 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
445 if (t->has_last_Java_frame()) {
446 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
447 frame* f = fst.current();
448 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
449 RegisterMap* reg_map = fst.register_map();
450 Deoptimization::deoptimize(t, *f, reg_map);
451 if (_make_not_entrant) {
452 nmethod* nm = CodeCache::find_nmethod(f->pc());
453 assert(nm != NULL, "sanity check");
454 nm->make_not_entrant();
455 }
456 ++_result;
457 }
458 }
459 }
460 }
461 }
462 };
463
464 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
465 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
466 VMThread::execute(&op);
467 return op.result();
468 WB_END
469
470 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
471 MutexLockerEx mu(Compile_lock);
472 CodeCache::mark_all_nmethods_for_deoptimization();
473 VM_Deoptimize op;
474 VMThread::execute(&op);
475 WB_END
476
477 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
478 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
479 int result = 0;
480 CHECK_JNI_EXCEPTION_(env, result);
481 MutexLockerEx mu(Compile_lock);
482 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
483 if (is_osr) {
484 result += mh->mark_osr_nmethods();
485 } else if (mh->code() != NULL) {
486 mh->code()->mark_for_deoptimization();
487 ++result;
488 }
489 result += CodeCache::mark_for_deoptimization(mh());
490 if (result > 0) {
491 VM_Deoptimize op;
492 VMThread::execute(&op);
493 }
494 return result;
495 WB_END
496
497 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
498 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
499 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
500 MutexLockerEx mu(Compile_lock);
501 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
502 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
503 if (code == NULL) {
504 return JNI_FALSE;
505 }
506 return (code->is_alive() && !code->is_marked_for_deoptimization());
507 WB_END
508
509 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
510 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
511 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
512 MutexLockerEx mu(Compile_lock);
513 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
514 if (is_osr) {
515 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
516 } else {
517 return CompilationPolicy::can_be_compiled(mh, comp_level);
518 }
519 WB_END
520
521 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
522 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
523 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
524 MutexLockerEx mu(Compile_lock);
525 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
526 return mh->queued_for_compilation();
527 WB_END
528
529 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
530 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
531 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
532 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
533 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
534 return (code != NULL ? code->comp_level() : CompLevel_none);
535 WB_END
536
537 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
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 if (is_osr) {
542 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
543 } else {
544 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
545 }
546 WB_END
547
548 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
549 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
550 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
551 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
552 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
553 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
554 WB_END
555
556 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
557 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
558 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
559 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
560 bool result = mh->dont_inline();
561 mh->set_dont_inline(value == JNI_TRUE);
562 return result;
563 WB_END
564
565 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
566 if (comp_level == CompLevel_any) {
567 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
568 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
569 } else {
570 return CompileBroker::queue_size(comp_level);
571 }
572 WB_END
573
574 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
575 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
576 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
577 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
578 bool result = mh->force_inline();
579 mh->set_force_inline(value == JNI_TRUE);
580 return result;
581 WB_END
582
583 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
584 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
585 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
586 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
587 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
588 MutexLockerEx mu(Compile_lock);
589 return (mh->queued_for_compilation() || nm != NULL);
590 WB_END
591
592 class AlwaysFalseClosure : public BoolObjectClosure {
593 public:
594 bool do_object_b(oop p) { return false; }
595 };
596
597 static AlwaysFalseClosure always_false;
598
599 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
600 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
601 CHECK_JNI_EXCEPTION(env);
602 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
603 MutexLockerEx mu(Compile_lock);
604 MethodData* mdo = mh->method_data();
605 MethodCounters* mcs = mh->method_counters();
606
607 if (mdo != NULL) {
608 mdo->init();
609 ResourceMark rm;
610 int arg_count = mdo->method()->size_of_parameters();
611 for (int i = 0; i < arg_count; i++) {
612 mdo->set_arg_modified(i, 0);
613 }
614 MutexLockerEx mu(mdo->extra_data_lock());
615 mdo->clean_method_data(&always_false);
616 }
617
618 mh->clear_not_c1_compilable();
619 mh->clear_not_c2_compilable();
620 mh->clear_not_c2_osr_compilable();
621 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
622 if (mcs != NULL) {
623 mcs->backedge_counter()->init();
624 mcs->invocation_counter()->init();
625 mcs->set_interpreter_invocation_count(0);
626 mcs->set_interpreter_throwout_count(0);
627
628 #ifdef TIERED
629 mcs->set_rate(0.0F);
630 mh->set_prev_event_count(0);
631 mh->set_prev_time(0);
632 #endif
633 }
634 WB_END
635
636 template <typename T>
637 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
638 if (name == NULL) {
639 return false;
640 }
641 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
642 const char* flag_name = env->GetStringUTFChars(name, NULL);
643 bool result = (*TAt)(flag_name, value, true, true);
644 env->ReleaseStringUTFChars(name, flag_name);
645 return result;
646 }
647
648 template <typename T>
649 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
650 if (name == NULL) {
651 return false;
652 }
653 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
654 const char* flag_name = env->GetStringUTFChars(name, NULL);
655 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
656 env->ReleaseStringUTFChars(name, flag_name);
657 return result;
658 }
659
660 template <typename T>
661 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
662 ResourceMark rm(thread);
663 jclass clazz = env->FindClass(name->as_C_string());
664 CHECK_JNI_EXCEPTION_(env, NULL);
665 jmethodID methodID = env->GetStaticMethodID(clazz,
666 vmSymbols::valueOf_name()->as_C_string(),
667 sig->as_C_string());
668 CHECK_JNI_EXCEPTION_(env, NULL);
669 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
670 CHECK_JNI_EXCEPTION_(env, NULL);
671 return result;
672 }
673
674 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
675 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
676 }
677 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
678 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
679 }
680 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
681 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
682 }
683 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
684 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
685 }*/
686 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
687 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
688 }
689
690 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
691 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
692 const char* flag_name = env->GetStringUTFChars(name, NULL);
693 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
694 env->ReleaseStringUTFChars(name, flag_name);
695 return result;
696 }
697
698 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
699 Flag* flag = getVMFlag(thread, env, name);
700 return (flag != NULL) && flag->is_constant_in_binary();
701 WB_END
702
703 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
704 Flag* flag = getVMFlag(thread, env, name);
705 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
706 WB_END
707
708 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
709 bool result;
710 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
711 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
712 return booleanBox(thread, env, result);
713 }
714 return NULL;
715 WB_END
716
717 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
718 intx result;
719 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
720 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
721 return longBox(thread, env, result);
722 }
723 return NULL;
724 WB_END
725
726 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
727 uintx result;
728 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
729 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
730 return longBox(thread, env, result);
731 }
732 return NULL;
733 WB_END
734
735 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
736 uint64_t result;
737 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
738 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
739 return longBox(thread, env, result);
740 }
741 return NULL;
742 WB_END
743
744 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
745 uintx result;
746 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
747 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
748 return longBox(thread, env, result);
749 }
750 return NULL;
751 WB_END
752
753 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
754 double result;
755 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
756 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
757 return doubleBox(thread, env, result);
758 }
759 return NULL;
760 WB_END
761
762 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
763 ccstr ccstrResult;
764 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
765 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
766 jstring result = env->NewStringUTF(ccstrResult);
767 CHECK_JNI_EXCEPTION_(env, NULL);
768 return result;
769 }
770 return NULL;
771 WB_END
772
773 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
774 bool result = value == JNI_TRUE ? true : false;
775 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
776 WB_END
777
778 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
779 intx result = value;
780 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
781 WB_END
782
783 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
784 uintx result = value;
785 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
786 WB_END
787
788 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
789 uint64_t result = value;
790 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
791 WB_END
792
793 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
794 size_t result = value;
795 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
796 WB_END
797
798 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
799 double result = value;
800 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
801 WB_END
802
803 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
804 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
805 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
806 ccstr ccstrResult = ccstrValue;
807 bool needFree;
808 {
809 ThreadInVMfromNative ttvfn(thread); // back to VM
810 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
811 }
812 if (value != NULL) {
813 env->ReleaseStringUTFChars(value, ccstrValue);
814 }
815 if (needFree) {
816 FREE_C_HEAP_ARRAY(char, ccstrResult);
817 }
818 WB_END
819
820 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
821 WhiteBox::compilation_locked = true;
822 WB_END
823
824 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
825 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
826 WhiteBox::compilation_locked = false;
827 mo.notify_all();
828 WB_END
829
830 void WhiteBox::sweeper_thread_entry(JavaThread* thread, TRAPS) {
831 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
832 {
833 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
834 NMethodSweeper::_should_sweep = true;
835 }
836 NMethodSweeper::possibly_sweep();
837 }
838
839 JavaThread* WhiteBox::create_sweeper_thread(TRAPS) {
840 // create sweeper thread w/ custom entry -- one iteration instead of loop
841 CodeCacheSweeperThread* sweeper_thread = new CodeCacheSweeperThread();
842 sweeper_thread->set_entry_point(&WhiteBox::sweeper_thread_entry);
843
844 // create j.l.Thread object and associate it w/ sweeper thread
845 {
846 // inherit deamon property from current thread
847 bool is_daemon = java_lang_Thread::is_daemon(JavaThread::current()->threadObj());
848
849 HandleMark hm(THREAD);
850 Handle thread_group(THREAD, Universe::system_thread_group());
851 const char* name = "WB Sweeper thread";
852 sweeper_thread->allocate_threadObj(thread_group, name, is_daemon, THREAD);
853 }
854
855 {
856 MutexLocker mu(Threads_lock, THREAD);
857 Threads::add(sweeper_thread);
858 }
859 return sweeper_thread;
860 }
861
862 WB_ENTRY(jobject, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
863 JavaThread* sweeper_thread = WhiteBox::create_sweeper_thread(Thread::current());
864 if (sweeper_thread == NULL) {
865 return NULL;
866 }
867 jobject result = JNIHandles::make_local(env, sweeper_thread->threadObj());
868 Thread::start(sweeper_thread);
869 return result;
870 WB_END
871
872 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
873 ResourceMark rm(THREAD);
874 int len;
875 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
876 return (StringTable::lookup(name, len) != NULL);
877 WB_END
878
879 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
880 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
881 Universe::heap()->collect(GCCause::_last_ditch_collection);
882 #if INCLUDE_ALL_GCS
883 if (UseG1GC) {
884 // Needs to be cleared explicitly for G1
885 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
886 }
887 #endif // INCLUDE_ALL_GCS
888 WB_END
889
890 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
891 Universe::heap()->collect(GCCause::_wb_young_gc);
892 WB_END
893
894 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
895 // static+volatile in order to force the read to happen
896 // (not be eliminated by the compiler)
897 static char c;
898 static volatile char* p;
899
900 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
901 if (p == NULL) {
902 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
903 }
904
905 c = *p;
906 WB_END
907
908 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
909 const char* cpu_features = VM_Version::cpu_features();
910 ThreadToNativeFromVM ttn(thread);
911 jstring features_string = env->NewStringUTF(cpu_features);
912
913 CHECK_JNI_EXCEPTION_(env, NULL);
914
915 return features_string;
916 WB_END
917
918 int WhiteBox::get_blob_type(const CodeBlob* code) {
919 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
920 return CodeCache::get_code_heap(code)->code_blob_type();
921 }
922
923 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
924 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
925 return CodeCache::get_code_heap(blob_type);
926 }
927
928 struct CodeBlobStub {
929 CodeBlobStub(const CodeBlob* blob) :
930 name(os::strdup(blob->name())),
931 size(blob->size()),
932 blob_type(WhiteBox::get_blob_type(blob)) { }
933 ~CodeBlobStub() { os::free((void*) name); }
934 const char* const name;
935 const int size;
936 const int blob_type;
937 };
938
939 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
940 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
941 CHECK_JNI_EXCEPTION_(env, NULL);
942 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
943
944 jstring name = env->NewStringUTF(cb->name);
945 CHECK_JNI_EXCEPTION_(env, NULL);
946 env->SetObjectArrayElement(result, 0, name);
947
948 jobject obj = integerBox(thread, env, cb->size);
949 CHECK_JNI_EXCEPTION_(env, NULL);
950 env->SetObjectArrayElement(result, 1, obj);
951
952 obj = integerBox(thread, env, cb->blob_type);
953 CHECK_JNI_EXCEPTION_(env, NULL);
954 env->SetObjectArrayElement(result, 2, obj);
955
956 return result;
957 }
958
959 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
960 ResourceMark rm(THREAD);
961 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
962 CHECK_JNI_EXCEPTION_(env, NULL);
963 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
964 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
965 jobjectArray result = NULL;
966 if (code == NULL) {
967 return result;
968 }
969 int insts_size = code->insts_size();
970
971 ThreadToNativeFromVM ttn(thread);
972 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
973 CHECK_JNI_EXCEPTION_(env, NULL);
974 result = env->NewObjectArray(4, clazz, NULL);
975 if (result == NULL) {
976 return result;
977 }
978
979 CodeBlobStub stub(code);
980 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
981 env->SetObjectArrayElement(result, 0, codeBlob);
982
983 jobject level = integerBox(thread, env, code->comp_level());
984 CHECK_JNI_EXCEPTION_(env, NULL);
985 env->SetObjectArrayElement(result, 1, level);
986
987 jbyteArray insts = env->NewByteArray(insts_size);
988 CHECK_JNI_EXCEPTION_(env, NULL);
989 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
990 env->SetObjectArrayElement(result, 2, insts);
991
992 jobject id = integerBox(thread, env, code->compile_id());
993 CHECK_JNI_EXCEPTION_(env, NULL);
994 env->SetObjectArrayElement(result, 3, id);
995
996 return result;
997 WB_END
998
999 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1000 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1001 BufferBlob* blob;
1002 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1003 if (full_size < size) {
1004 full_size += round_to(size - full_size, oopSize);
1005 }
1006 {
1007 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1008 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1009 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1010 }
1011 // Track memory usage statistic after releasing CodeCache_lock
1012 MemoryService::track_code_cache_memory_usage();
1013 return blob;
1014 }
1015
1016 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1017 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1018 WB_END
1019
1020 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1021 BufferBlob::free((BufferBlob*) addr);
1022 WB_END
1023
1024 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1025 ResourceMark rm;
1026 GrowableArray<CodeBlobStub*> blobs;
1027 {
1028 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1029 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1030 if (heap == NULL) {
1031 return NULL;
1032 }
1033 for (CodeBlob* cb = (CodeBlob*) heap->first();
1034 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1035 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1036 new (stub) CodeBlobStub(cb);
1037 blobs.append(stub);
1038 }
1039 }
1040 if (blobs.length() == 0) {
1041 return NULL;
1042 }
1043 ThreadToNativeFromVM ttn(thread);
1044 jobjectArray result = NULL;
1045 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1046 CHECK_JNI_EXCEPTION_(env, NULL);
1047 result = env->NewObjectArray(blobs.length(), clazz, NULL);
1048 if (result == NULL) {
1049 return result;
1050 }
1051 int i = 0;
1052 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1053 it != blobs.end(); ++it) {
1054 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1055 env->SetObjectArrayElement(result, i, obj);
1056 ++i;
1057 }
1058 return result;
1059 WB_END
1060
1061 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1062 return CompileBroker::get_compilation_activity_mode();
1063 WB_END
1064
1065 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1066 ThreadToNativeFromVM ttn(thread);
1067 CodeBlobStub stub((CodeBlob*) addr);
1068 return codeBlob2objectArray(thread, env, &stub);
1069 WB_END
1070
1071 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1072 return (jlong) Thread::current()->stack_size();
1073 WB_END
1074
1075 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1076 JavaThread* t = JavaThread::current();
1077 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
1078 WB_END
1079
1080 int WhiteBox::array_bytes_to_length(size_t bytes) {
1081 return Array<u1>::bytes_to_length(bytes);
1082 }
1083
1084 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1085 if (size < 0) {
1086 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1087 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1088 }
1089
1090 oop class_loader_oop = JNIHandles::resolve(class_loader);
1091 ClassLoaderData* cld = class_loader_oop != NULL
1092 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1093 : ClassLoaderData::the_null_class_loader_data();
1094
1095 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1096
1097 return (jlong)(uintptr_t)metadata;
1098 WB_END
1099
1100 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1101 oop class_loader_oop = JNIHandles::resolve(class_loader);
1102 ClassLoaderData* cld = class_loader_oop != NULL
1103 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1104 : ClassLoaderData::the_null_class_loader_data();
1105
1106 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1107 WB_END
1108
1109 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1110 if (inc < 0) {
1111 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1112 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1113 }
1114
1115 jlong max_size_t = (jlong) ((size_t) -1);
1116 if (inc > max_size_t) {
1117 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1118 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1119 }
1120
1121 size_t new_cap_until_GC = 0;
1122 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1123 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1124 if (!success) {
1125 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1126 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1127 "due to contention with another thread");
1128 }
1129 return (jlong) new_cap_until_GC;
1130 WB_END
1131
1132 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1133 return (jlong) MetaspaceGC::capacity_until_GC();
1134 WB_END
1135
1136 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1137 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1138 Monitor::_safepoint_check_always :
1139 Monitor::_safepoint_check_never;
1140 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1141 attemptedNoSafepointValue == JNI_TRUE);
1142 WB_END
1143
1144 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1145 oop obj_oop = JNIHandles::resolve(obj);
1146 return (jboolean) obj_oop->mark()->has_monitor();
1147 WB_END
1148
1149 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1150 VM_ForceSafepoint force_safepoint_op;
1151 VMThread::execute(&force_safepoint_op);
1152 WB_END
1153
1154 template <typename T>
1155 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1156 assert(value != NULL, "sanity");
1157 if (method == NULL || name == NULL) {
1158 return false;
1159 }
1160 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1161 CHECK_JNI_EXCEPTION_(env, false);
1162 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1163 // can't be in VM when we call JNI
1164 ThreadToNativeFromVM ttnfv(thread);
1165 const char* flag_name = env->GetStringUTFChars(name, NULL);
1166 bool result = CompilerOracle::has_option_value(mh, flag_name, *value);
1167 env->ReleaseStringUTFChars(name, flag_name);
1168 return result;
1169 }
1170
1171 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1172 bool result;
1173 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1174 // can't be in VM when we call JNI
1175 ThreadToNativeFromVM ttnfv(thread);
1176 return booleanBox(thread, env, result);
1177 }
1178 return NULL;
1179 WB_END
1180
1181 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1182 intx result;
1183 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1184 // can't be in VM when we call JNI
1185 ThreadToNativeFromVM ttnfv(thread);
1186 return longBox(thread, env, result);
1187 }
1188 return NULL;
1189 WB_END
1190
1191 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1192 uintx result;
1193 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1194 // can't be in VM when we call JNI
1195 ThreadToNativeFromVM ttnfv(thread);
1196 return longBox(thread, env, result);
1197 }
1198 return NULL;
1199 WB_END
1200
1201 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1202 double result;
1203 if (GetMethodOption <double> (thread, env, method, name, &result)) {
1204 // can't be in VM when we call JNI
1205 ThreadToNativeFromVM ttnfv(thread);
1206 return doubleBox(thread, env, result);
1207 }
1208 return NULL;
1209 WB_END
1210
1211 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1212 ccstr ccstrResult;
1213 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1214 // can't be in VM when we call JNI
1215 ThreadToNativeFromVM ttnfv(thread);
1216 jstring result = env->NewStringUTF(ccstrResult);
1217 CHECK_JNI_EXCEPTION_(env, NULL);
1218 return result;
1219 }
1220 return NULL;
1221 WB_END
1222
1223 //Some convenience methods to deal with objects from java
1224 int WhiteBox::offset_for_field(const char* field_name, oop object,
1225 Symbol* signature_symbol) {
1226 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1227 Thread* THREAD = Thread::current();
1228
1229 //Get the class of our object
1230 Klass* arg_klass = object->klass();
1231 //Turn it into an instance-klass
1232 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1233
1234 //Create symbols to look for in the class
1235 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1236 THREAD);
1237
1238 //To be filled in with an offset of the field we're looking for
1239 fieldDescriptor fd;
1240
1241 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1242 if (res == NULL) {
1243 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1244 name_symbol->as_C_string());
1245 fatal("Invalid layout of preloaded class");
1246 }
1247
1248 //fetch the field at the offset we've found
1249 int dest_offset = fd.offset();
1250
1251 return dest_offset;
1252 }
1253
1254
1255 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1256 int offset = offset_for_field(field_name, object,
1257 vmSymbols::string_signature());
1258 oop string = object->obj_field(offset);
1259 if (string == NULL) {
1260 return NULL;
1261 }
1262 const char* ret = java_lang_String::as_utf8_string(string);
1263 return ret;
1264 }
1265
1266 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1267 int offset =
1268 offset_for_field(field_name, object, vmSymbols::bool_signature());
1269 bool ret = (object->bool_field(offset) == JNI_TRUE);
1270 return ret;
1271 }
1272
1273 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1274 ResourceMark rm;
1275 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1276
1277 // one by one registration natives for exception catching
1278 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1279 CHECK_JNI_EXCEPTION(env);
1280 for (int i = 0, n = method_count; i < n; ++i) {
1281 // Skip dummy entries
1282 if (method_array[i].fnPtr == NULL) continue;
1283 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1284 jthrowable throwable_obj = env->ExceptionOccurred();
1285 if (throwable_obj != NULL) {
1286 env->ExceptionClear();
1287 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1288 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1289 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1290 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1291 method_array[i].name, method_array[i].signature);
1292 }
1293 } else {
1294 // Registration failed unexpectedly.
1295 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1296 method_array[i].name, method_array[i].signature);
1297 env->UnregisterNatives(wbclass);
1298 break;
1299 }
1300 }
1301 }
1302 }
1303
1304 #define CC (char*)
1305
1306 static JNINativeMethod methods[] = {
1307 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1308 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1309 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1310 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1311 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1312 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
1313 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1314 {CC"parseCommandLine",
1315 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1316 (void*) &WB_ParseCommandLine
1317 },
1318 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V",
1319 (void*)&WB_AddToBootstrapClassLoaderSearch},
1320 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V",
1321 (void*)&WB_AddToSystemClassLoaderSearch},
1322 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1323 (void*)&WB_GetCompressedOopsMaxHeapSize},
1324 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1325 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1326 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1327 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1328 #if INCLUDE_ALL_GCS
1329 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1330 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1331 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
1332 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1333 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1334 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1335 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1336 (void*)&WB_G1AuxiliaryMemoryUsage },
1337 #endif // INCLUDE_ALL_GCS
1338 #if INCLUDE_NMT
1339 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1340 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1341 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1342 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1343 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1344 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1345 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1346 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1347 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1348 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1349 #endif // INCLUDE_NMT
1350 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
1351 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1352 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1353 (void*)&WB_DeoptimizeMethod },
1354 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1355 (void*)&WB_IsMethodCompiled },
1356 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1357 (void*)&WB_IsMethodCompilable},
1358 {CC"isMethodQueuedForCompilation",
1359 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1360 {CC"makeMethodNotCompilable",
1361 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1362 {CC"testSetDontInlineMethod",
1363 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1364 {CC"getMethodCompilationLevel",
1365 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1366 {CC"getMethodEntryBci",
1367 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1368 {CC"getCompileQueueSize",
1369 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1370 {CC"testSetForceInlineMethod",
1371 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1372 {CC"enqueueMethodForCompilation",
1373 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1374 {CC"clearMethodState",
1375 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1376 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1377 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1378 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1379 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1380 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1381 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1382 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1383 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1384 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1385 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1386 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1387 (void*)&WB_SetStringVMFlag},
1388 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1389 (void*)&WB_GetBooleanVMFlag},
1390 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1391 (void*)&WB_GetIntxVMFlag},
1392 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1393 (void*)&WB_GetUintxVMFlag},
1394 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1395 (void*)&WB_GetUint64VMFlag},
1396 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1397 (void*)&WB_GetSizeTVMFlag},
1398 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1399 (void*)&WB_GetDoubleVMFlag},
1400 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1401 (void*)&WB_GetStringVMFlag},
1402 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1403 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1404 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1405 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1406 {CC"allocateMetaspace",
1407 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1408 {CC"freeMetaspace",
1409 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1410 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1411 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1412 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1413 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1414 (void*)&WB_GetNMethod },
1415 {CC"forceNMethodSweep0", CC"()Ljava/lang/Thread;", (void*)&WB_ForceNMethodSweep },
1416 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1417 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1418 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1419 {CC"getCompilationActivityMode",
1420 CC"()I", (void*)&WB_GetCompilationActivityMode},
1421 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1422 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1423 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1424 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
1425 {CC"isMonitorInflated", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1426 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1427 {CC"getMethodBooleanOption",
1428 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1429 (void*)&WB_GetMethodBooleaneOption},
1430 {CC"getMethodIntxOption",
1431 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1432 (void*)&WB_GetMethodIntxOption},
1433 {CC"getMethodUintxOption",
1434 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1435 (void*)&WB_GetMethodUintxOption},
1436 {CC"getMethodDoubleOption",
1437 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1438 (void*)&WB_GetMethodDoubleOption},
1439 {CC"getMethodStringOption",
1440 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1441 (void*)&WB_GetMethodStringOption},
1442 };
1443
1444 #undef CC
1445
1446 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1447 {
1448 if (WhiteBoxAPI) {
1449 // Make sure that wbclass is loaded by the null classloader
1450 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1451 Handle loader(ikh->class_loader());
1452 if (loader.is_null()) {
1453 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1454 WhiteBox::register_extended(env, wbclass, thread);
1455 WhiteBox::set_used();
1456 }
1457 }
1458 }
1459 JVM_END