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 class WBIsKlassAliveClosure : public KlassClosure {
93 Symbol* _name;
94 bool _found;
95 public:
96 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
97
98 void do_klass(Klass* k) {
99 if (_found) return;
100 Symbol* ksym = k->name();
101 if (ksym->fast_compare(_name) == 0) {
102 _found = true;
103 }
104 }
105
106 bool found() const {
107 return _found;
108 }
109 };
110
111 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
112 Handle h_name = JNIHandles::resolve(name);
113 if (h_name.is_null()) return false;
114 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
115 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
116
117 WBIsKlassAliveClosure closure(sym);
118 ClassLoaderDataGraph::classes_do(&closure);
119
120 return closure.found();
121 WB_END
122
123 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
124 #if INCLUDE_JVMTI
125 ResourceMark rm;
126 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
127 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
128 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
129 assert(err == JVMTI_ERROR_NONE, "must not fail");
130 #endif
131 }
132 WB_END
133
134 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
135 #if INCLUDE_JVMTI
136 ResourceMark rm;
137 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
138 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
139 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
140 assert(err == JVMTI_ERROR_NONE, "must not fail");
141 #endif
142 }
143 WB_END
144
145
146 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
147 return (jlong)Arguments::max_heap_for_compressed_oops();
148 }
149 WB_END
150
151 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
152 CollectorPolicy * p = Universe::heap()->collector_policy();
153 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
154 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
155 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
156 p->space_alignment(), p->heap_alignment());
157 }
158 WB_END
159
160 #ifndef PRODUCT
161 // Forward declaration
162 void TestReservedSpace_test();
163 void TestReserveMemorySpecial_test();
164 void TestVirtualSpace_test();
165 void TestMetaspaceAux_test();
166 #endif
167
168 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
169 #ifndef PRODUCT
170 TestReservedSpace_test();
171 TestReserveMemorySpecial_test();
172 TestVirtualSpace_test();
173 TestMetaspaceAux_test();
174 #endif
175 WB_END
176
177 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
178 size_t granularity = os::vm_allocation_granularity();
179 ReservedHeapSpace rhs(100 * granularity, granularity, false);
180 VirtualSpace vs;
181 vs.initialize(rhs, 50 * granularity);
182
183 // Check if constraints are complied
184 if (!( UseCompressedOops && rhs.base() != NULL &&
185 Universe::narrow_oop_base() != NULL &&
186 Universe::narrow_oop_use_implicit_null_checks() )) {
187 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
188 "\tUseCompressedOops is %d\n"
189 "\trhs.base() is "PTR_FORMAT"\n"
190 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
191 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
192 UseCompressedOops,
193 rhs.base(),
194 Universe::narrow_oop_base(),
195 Universe::narrow_oop_use_implicit_null_checks());
196 return;
197 }
198 tty->print_cr("Reading from no access area... ");
199 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
200 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
201 WB_END
202
203 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
204 size_t magnitude, size_t iterations) {
205 size_t granularity = os::vm_allocation_granularity();
206 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
207 VirtualSpace vs;
208 if (!vs.initialize(rhs, 0)) {
209 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
210 return 3;
211 }
212
213 long seed = os::random();
214 tty->print_cr("Random seed is %ld", seed);
215 os::init_random(seed);
216
217 for (size_t i = 0; i < iterations; i++) {
218
219 // Whether we will shrink or grow
220 bool shrink = os::random() % 2L == 0;
221
222 // Get random delta to resize virtual space
223 size_t delta = (size_t)os::random() % magnitude;
224
225 // If we are about to shrink virtual space below zero, then expand instead
226 if (shrink && vs.committed_size() < delta) {
227 shrink = false;
228 }
229
230 // Resizing by delta
231 if (shrink) {
232 vs.shrink_by(delta);
233 } else {
234 // If expanding fails expand_by will silently return false
235 vs.expand_by(delta, true);
236 }
237 }
238 return 0;
239 }
240
241 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
242 jlong reserved_space_size, jlong magnitude, jlong iterations))
243 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
244 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
245 iterations);
246 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
247 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
248 return 1;
249 }
250
251 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
252 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
253 if (sizeof(size_t) < sizeof(jlong)) {
254 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
255 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
256 || iterations > size_t_max_value) {
257 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
258 return 2;
259 }
260 }
261
262 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
263 (size_t) magnitude, (size_t) iterations);
264 WB_END
265
266 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
267 oop p = JNIHandles::resolve(obj);
268 #if INCLUDE_ALL_GCS
269 if (UseG1GC) {
270 G1CollectedHeap* g1 = G1CollectedHeap::heap();
271 const HeapRegion* hr = g1->heap_region_containing(p);
272 if (hr == NULL) {
273 return false;
274 }
275 return !(hr->is_young());
276 } else if (UseParallelGC) {
277 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
278 return !psh->is_in_young(p);
279 }
280 #endif // INCLUDE_ALL_GCS
281 GenCollectedHeap* gch = GenCollectedHeap::heap();
282 return !gch->is_in_young(p);
283 WB_END
284
285 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
286 oop p = JNIHandles::resolve(obj);
287 return p->size() * HeapWordSize;
288 WB_END
289
290 #if INCLUDE_ALL_GCS
291 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
292 G1CollectedHeap* g1 = G1CollectedHeap::heap();
293 oop result = JNIHandles::resolve(obj);
294 const HeapRegion* hr = g1->heap_region_containing(result);
295 return hr->is_humongous();
296 WB_END
297
298 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
299 G1CollectedHeap* g1 = G1CollectedHeap::heap();
300 size_t nr = g1->num_free_regions();
301 return (jlong)nr;
302 WB_END
303
304 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
305 G1CollectedHeap* g1 = G1CollectedHeap::heap();
306 return g1->concurrent_mark()->cmThread()->during_cycle();
307 WB_END
308
309 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
310 G1CollectedHeap* g1h = G1CollectedHeap::heap();
311 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
312 g1h->collect(GCCause::_wb_conc_mark);
313 return true;
314 }
315 return false;
316 WB_END
317
318 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
319 return (jint)HeapRegion::GrainBytes;
320 WB_END
321 #endif // INCLUDE_ALL_GCS
322
323 #if INCLUDE_NMT
324 // Alloc memory using the test memory type so that we can use that to see if
325 // NMT picks it up correctly
326 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
327 jlong addr = 0;
328 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
329 return addr;
330 WB_END
331
332 // Alloc memory with pseudo call stack. The test can create psudo malloc
333 // allocation site to stress the malloc tracking.
334 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
335 address pc = (address)(size_t)pseudo_stack;
336 NativeCallStack stack(&pc, 1);
337 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
338 WB_END
339
340 // Free the memory allocated by NMTAllocTest
341 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
342 os::free((void*)(uintptr_t)mem);
343 WB_END
344
345 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
346 jlong addr = 0;
347
348 addr = (jlong)(uintptr_t)os::reserve_memory(size);
349 MemTracker::record_virtual_memory_type((address)addr, mtTest);
350
351 return addr;
352 WB_END
353
354 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
355 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
356 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
357 WB_END
358
359 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
360 os::uncommit_memory((char *)(uintptr_t)addr, size);
361 WB_END
362
363 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
364 os::release_memory((char *)(uintptr_t)addr, size);
365 WB_END
366
367 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
368 // Test that we can downgrade NMT levels but not upgrade them.
369 if (MemTracker::tracking_level() == NMT_off) {
370 MemTracker::transition_to(NMT_off);
371 return MemTracker::tracking_level() == NMT_off;
372 } else {
373 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
374 MemTracker::transition_to(NMT_summary);
375 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
376
377 // Can't go to detail once NMT is set to summary.
378 MemTracker::transition_to(NMT_detail);
379 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
380
381 // Shutdown sets tracking level to minimal.
382 MemTracker::shutdown();
383 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
384
385 // Once the tracking level is minimal, we cannot increase to summary.
386 // The code ignores this request instead of asserting because if the malloc site
387 // table overflows in another thread, it tries to change the code to summary.
388 MemTracker::transition_to(NMT_summary);
389 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
390
391 // Really can never go up to detail, verify that the code would never do this.
392 MemTracker::transition_to(NMT_detail);
393 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
394 return MemTracker::tracking_level() == NMT_minimal;
395 }
396 WB_END
397
398 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
399 int hash_size = MallocSiteTable::hash_buckets();
400 assert(hash_size > 0, "NMT hash_size should be > 0");
401 return (jint)hash_size;
402 WB_END
403 #endif // INCLUDE_NMT
404
405 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
406 assert(method != NULL, "method should not be null");
407 ThreadToNativeFromVM ttn(thread);
408 return env->FromReflectedMethod(method);
409 }
410
411 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
412 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
413 private:
414 int _result;
415 const bool _make_not_entrant;
416 public:
417 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
418 _result(0), _make_not_entrant(make_not_entrant) { }
419 int result() const { return _result; }
420
421 void doit() {
422 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
423 if (t->has_last_Java_frame()) {
424 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
425 frame* f = fst.current();
426 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
427 RegisterMap* reg_map = fst.register_map();
428 Deoptimization::deoptimize(t, *f, reg_map);
429 if (_make_not_entrant) {
430 nmethod* nm = CodeCache::find_nmethod(f->pc());
431 assert(nm != NULL, "sanity check");
432 nm->make_not_entrant();
433 }
434 ++_result;
435 }
436 }
437 }
438 }
439 }
440 };
441
442 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
443 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
444 VMThread::execute(&op);
445 return op.result();
446 WB_END
447
448 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
449 MutexLockerEx mu(Compile_lock);
450 CodeCache::mark_all_nmethods_for_deoptimization();
451 VM_Deoptimize op;
452 VMThread::execute(&op);
453 WB_END
454
455 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
456 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
457 int result = 0;
458 CHECK_JNI_EXCEPTION_(env, result);
459 MutexLockerEx mu(Compile_lock);
460 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
461 if (is_osr) {
462 result += mh->mark_osr_nmethods();
463 } else if (mh->code() != NULL) {
464 mh->code()->mark_for_deoptimization();
465 ++result;
466 }
467 result += CodeCache::mark_for_deoptimization(mh());
468 if (result > 0) {
469 VM_Deoptimize op;
470 VMThread::execute(&op);
471 }
472 return result;
473 WB_END
474
475 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
476 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
477 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
478 MutexLockerEx mu(Compile_lock);
479 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
480 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
481 if (code == NULL) {
482 return JNI_FALSE;
483 }
484 return (code->is_alive() && !code->is_marked_for_deoptimization());
485 WB_END
486
487 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
488 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
489 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
490 MutexLockerEx mu(Compile_lock);
491 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
492 if (is_osr) {
493 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
494 } else {
495 return CompilationPolicy::can_be_compiled(mh, comp_level);
496 }
497 WB_END
498
499 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
500 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
501 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
502 MutexLockerEx mu(Compile_lock);
503 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
504 return mh->queued_for_compilation();
505 WB_END
506
507 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
508 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
509 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
510 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
511 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
512 return (code != NULL ? code->comp_level() : CompLevel_none);
513 WB_END
514
515 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
516 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
517 CHECK_JNI_EXCEPTION(env);
518 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
519 if (is_osr) {
520 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
521 } else {
522 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
523 }
524 WB_END
525
526 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
527 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
528 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
529 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
530 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
531 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
532 WB_END
533
534 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
535 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
536 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
537 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
538 bool result = mh->dont_inline();
539 mh->set_dont_inline(value == JNI_TRUE);
540 return result;
541 WB_END
542
543 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
544 if (comp_level == CompLevel_any) {
545 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
546 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
547 } else {
548 return CompileBroker::queue_size(comp_level);
549 }
550 WB_END
551
552 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
553 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
554 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
555 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
556 bool result = mh->force_inline();
557 mh->set_force_inline(value == JNI_TRUE);
558 return result;
559 WB_END
560
561 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
562 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
563 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
564 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
565 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
566 MutexLockerEx mu(Compile_lock);
567 return (mh->queued_for_compilation() || nm != NULL);
568 WB_END
569
570 class AlwaysFalseClosure : public BoolObjectClosure {
571 public:
572 bool do_object_b(oop p) { return false; }
573 };
574
575 static AlwaysFalseClosure always_false;
576
577 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
578 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
579 CHECK_JNI_EXCEPTION(env);
580 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
581 MutexLockerEx mu(Compile_lock);
582 MethodData* mdo = mh->method_data();
583 MethodCounters* mcs = mh->method_counters();
584
585 if (mdo != NULL) {
586 mdo->init();
587 ResourceMark rm;
588 int arg_count = mdo->method()->size_of_parameters();
589 for (int i = 0; i < arg_count; i++) {
590 mdo->set_arg_modified(i, 0);
591 }
592 MutexLockerEx mu(mdo->extra_data_lock());
593 mdo->clean_method_data(&always_false);
594 }
595
596 mh->clear_not_c1_compilable();
597 mh->clear_not_c2_compilable();
598 mh->clear_not_c2_osr_compilable();
599 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
600 if (mcs != NULL) {
601 mcs->backedge_counter()->init();
602 mcs->invocation_counter()->init();
603 mcs->set_interpreter_invocation_count(0);
604 mcs->set_interpreter_throwout_count(0);
605
606 #ifdef TIERED
607 mcs->set_rate(0.0F);
608 mh->set_prev_event_count(0);
609 mh->set_prev_time(0);
610 #endif
611 }
612 WB_END
613
614 template <typename T>
615 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
616 if (name == NULL) {
617 return false;
618 }
619 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
620 const char* flag_name = env->GetStringUTFChars(name, NULL);
621 bool result = (*TAt)(flag_name, value, true, true);
622 env->ReleaseStringUTFChars(name, flag_name);
623 return result;
624 }
625
626 template <typename T>
627 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
628 if (name == NULL) {
629 return false;
630 }
631 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
632 const char* flag_name = env->GetStringUTFChars(name, NULL);
633 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
634 env->ReleaseStringUTFChars(name, flag_name);
635 return result;
636 }
637
638 template <typename T>
639 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
640 ResourceMark rm(thread);
641 jclass clazz = env->FindClass(name->as_C_string());
642 CHECK_JNI_EXCEPTION_(env, NULL);
643 jmethodID methodID = env->GetStaticMethodID(clazz,
644 vmSymbols::valueOf_name()->as_C_string(),
645 sig->as_C_string());
646 CHECK_JNI_EXCEPTION_(env, NULL);
647 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
648 CHECK_JNI_EXCEPTION_(env, NULL);
649 return result;
650 }
651
652 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
653 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
654 }
655 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
656 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
657 }
658 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
659 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
660 }
661 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
662 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
663 }*/
664 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
665 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
666 }
667
668 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
669 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
670 const char* flag_name = env->GetStringUTFChars(name, NULL);
671 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
672 env->ReleaseStringUTFChars(name, flag_name);
673 return result;
674 }
675
676 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
677 Flag* flag = getVMFlag(thread, env, name);
678 return (flag != NULL) && flag->is_constant_in_binary();
679 WB_END
680
681 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
682 Flag* flag = getVMFlag(thread, env, name);
683 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
684 WB_END
685
686 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
687 bool result;
688 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
689 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
690 return booleanBox(thread, env, result);
691 }
692 return NULL;
693 WB_END
694
695 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
696 intx result;
697 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
698 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
699 return longBox(thread, env, result);
700 }
701 return NULL;
702 WB_END
703
704 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
705 uintx result;
706 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
707 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
708 return longBox(thread, env, result);
709 }
710 return NULL;
711 WB_END
712
713 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
714 uint64_t result;
715 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
716 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
717 return longBox(thread, env, result);
718 }
719 return NULL;
720 WB_END
721
722 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
723 uintx result;
724 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
725 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
726 return longBox(thread, env, result);
727 }
728 return NULL;
729 WB_END
730
731 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
732 double result;
733 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
734 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
735 return doubleBox(thread, env, result);
736 }
737 return NULL;
738 WB_END
739
740 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
741 ccstr ccstrResult;
742 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
743 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
744 jstring result = env->NewStringUTF(ccstrResult);
745 CHECK_JNI_EXCEPTION_(env, NULL);
746 return result;
747 }
748 return NULL;
749 WB_END
750
751 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
752 bool result = value == JNI_TRUE ? true : false;
753 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
754 WB_END
755
756 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
757 intx result = value;
758 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
759 WB_END
760
761 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
762 uintx result = value;
763 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
764 WB_END
765
766 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
767 uint64_t result = value;
768 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
769 WB_END
770
771 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
772 size_t result = value;
773 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
774 WB_END
775
776 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
777 double result = value;
778 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
779 WB_END
780
781 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
782 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
783 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
784 ccstr ccstrResult = ccstrValue;
785 bool needFree;
786 {
787 ThreadInVMfromNative ttvfn(thread); // back to VM
788 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
789 }
790 if (value != NULL) {
791 env->ReleaseStringUTFChars(value, ccstrValue);
792 }
793 if (needFree) {
794 FREE_C_HEAP_ARRAY(char, ccstrResult);
795 }
796 WB_END
797
798 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
799 WhiteBox::compilation_locked = true;
800 WB_END
801
802 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
803 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
804 WhiteBox::compilation_locked = false;
805 mo.notify_all();
806 WB_END
807
808 void WhiteBox::sweeper_thread_entry(JavaThread* thread, TRAPS) {
809 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
810 {
811 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
812 NMethodSweeper::_should_sweep = true;
813 }
814 NMethodSweeper::possibly_sweep();
815 }
816
817 JavaThread* WhiteBox::create_sweeper_thread(TRAPS) {
818 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, THREAD);
819 instanceKlassHandle klass(THREAD, k);
820 instanceHandle thread_oop = klass->allocate_instance_handle(THREAD);
821
822 Handle name = java_lang_String::create_from_str("WB Sweeper thread", THREAD);
823
824 // Initialize thread_oop to put it into the system threadGroup
825 Handle thread_group(THREAD, Universe::system_thread_group());
826 JavaValue result(T_VOID);
827 JavaCalls::call_special(&result,
828 thread_oop,
829 klass,
830 vmSymbols::object_initializer_name(),
831 vmSymbols::threadgroup_string_void_signature(),
832 thread_group,
833 name,
834 THREAD);
835
836 KlassHandle group(THREAD, SystemDictionary::ThreadGroup_klass());
837 JavaCalls::call_special(&result,
838 thread_group,
839 group,
840 vmSymbols::add_method_name(),
841 vmSymbols::thread_void_signature(),
842 thread_oop, // ARG 1
843 THREAD);
844
845 {
846 MutexLocker mu(Threads_lock);
847
848 // create sweeper thread w/ custom entry -- one iteration instead of loop
849 CodeCacheSweeperThread* sweeper_thread = new CodeCacheSweeperThread();
850 sweeper_thread->set_entry_point(&WhiteBox::sweeper_thread_entry);
851
852 // check that thread and osthread were created
853 if (sweeper_thread == NULL || sweeper_thread->osthread() == NULL) {
854 vm_exit_during_initialization("java.lang.OutOfMemoryError",
855 os::native_thread_creation_failed_msg());
856 }
857
858 java_lang_Thread::set_thread(thread_oop(), sweeper_thread);
859 // inherit daemon property from current thread
860 if (java_lang_Thread::is_daemon(JavaThread::current()->threadObj())) {
861 java_lang_Thread::set_daemon(thread_oop());
862 }
863
864 // Make sure that both the thread_oop is set and the thread is added to
865 // the threads list before a safepoint can happen. Otherwise, a GC may
866 // move the thread object without updating the oop.
867 sweeper_thread->set_threadObj(thread_oop());
868 Threads::add(sweeper_thread);
869 return sweeper_thread;
870 }
871 }
872
873 WB_ENTRY(jobject, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
874 JavaThread* sweeper_thread = WhiteBox::create_sweeper_thread(Thread::current());
875 if (sweeper_thread == NULL) {
876 return NULL;
877 }
878 jobject result = JNIHandles::make_local(env, sweeper_thread->threadObj());
879 Thread::start(sweeper_thread);
880 return result;
881 WB_END
882
883 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
884 ResourceMark rm(THREAD);
885 int len;
886 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
887 return (StringTable::lookup(name, len) != NULL);
888 WB_END
889
890 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
891 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
892 Universe::heap()->collect(GCCause::_last_ditch_collection);
893 #if INCLUDE_ALL_GCS
894 if (UseG1GC) {
895 // Needs to be cleared explicitly for G1
896 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
897 }
898 #endif // INCLUDE_ALL_GCS
899 WB_END
900
901 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
902 Universe::heap()->collect(GCCause::_wb_young_gc);
903 WB_END
904
905 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
906 // static+volatile in order to force the read to happen
907 // (not be eliminated by the compiler)
908 static char c;
909 static volatile char* p;
910
911 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
912 if (p == NULL) {
913 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
914 }
915
916 c = *p;
917 WB_END
918
919 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
920 const char* cpu_features = VM_Version::cpu_features();
921 ThreadToNativeFromVM ttn(thread);
922 jstring features_string = env->NewStringUTF(cpu_features);
923
924 CHECK_JNI_EXCEPTION_(env, NULL);
925
926 return features_string;
927 WB_END
928
929 int WhiteBox::get_blob_type(const CodeBlob* code) {
930 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
931 return CodeCache::get_code_heap(code)->code_blob_type();
932 }
933
934 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
935 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
936 return CodeCache::get_code_heap(blob_type);
937 }
938
939 struct CodeBlobStub {
940 CodeBlobStub(const CodeBlob* blob) :
941 name(os::strdup(blob->name())),
942 size(blob->size()),
943 blob_type(WhiteBox::get_blob_type(blob)) { }
944 ~CodeBlobStub() { os::free((void*) name); }
945 const char* const name;
946 const int size;
947 const int blob_type;
948 };
949
950 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
951 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
952 CHECK_JNI_EXCEPTION_(env, NULL);
953 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
954
955 jstring name = env->NewStringUTF(cb->name);
956 CHECK_JNI_EXCEPTION_(env, NULL);
957 env->SetObjectArrayElement(result, 0, name);
958
959 jobject obj = integerBox(thread, env, cb->size);
960 CHECK_JNI_EXCEPTION_(env, NULL);
961 env->SetObjectArrayElement(result, 1, obj);
962
963 obj = integerBox(thread, env, cb->blob_type);
964 CHECK_JNI_EXCEPTION_(env, NULL);
965 env->SetObjectArrayElement(result, 2, obj);
966
967 return result;
968 }
969
970 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
971 ResourceMark rm(THREAD);
972 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
973 CHECK_JNI_EXCEPTION_(env, NULL);
974 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
975 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
976 jobjectArray result = NULL;
977 if (code == NULL) {
978 return result;
979 }
980 int insts_size = code->insts_size();
981
982 ThreadToNativeFromVM ttn(thread);
983 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
984 CHECK_JNI_EXCEPTION_(env, NULL);
985 result = env->NewObjectArray(4, clazz, NULL);
986 if (result == NULL) {
987 return result;
988 }
989
990 CodeBlobStub stub(code);
991 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
992 env->SetObjectArrayElement(result, 0, codeBlob);
993
994 jobject level = integerBox(thread, env, code->comp_level());
995 CHECK_JNI_EXCEPTION_(env, NULL);
996 env->SetObjectArrayElement(result, 1, level);
997
998 jbyteArray insts = env->NewByteArray(insts_size);
999 CHECK_JNI_EXCEPTION_(env, NULL);
1000 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1001 env->SetObjectArrayElement(result, 2, insts);
1002
1003 jobject id = integerBox(thread, env, code->compile_id());
1004 CHECK_JNI_EXCEPTION_(env, NULL);
1005 env->SetObjectArrayElement(result, 3, id);
1006
1007 return result;
1008 WB_END
1009
1010 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1011 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1012 BufferBlob* blob;
1013 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1014 if (full_size < size) {
1015 full_size += round_to(size - full_size, oopSize);
1016 }
1017 {
1018 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1019 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1020 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1021 }
1022 // Track memory usage statistic after releasing CodeCache_lock
1023 MemoryService::track_code_cache_memory_usage();
1024 return blob;
1025 }
1026
1027 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1028 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1029 WB_END
1030
1031 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1032 BufferBlob::free((BufferBlob*) addr);
1033 WB_END
1034
1035 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1036 ResourceMark rm;
1037 GrowableArray<CodeBlobStub*> blobs;
1038 {
1039 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1040 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1041 if (heap == NULL) {
1042 return NULL;
1043 }
1044 for (CodeBlob* cb = (CodeBlob*) heap->first();
1045 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1046 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1047 new (stub) CodeBlobStub(cb);
1048 blobs.append(stub);
1049 }
1050 }
1051 if (blobs.length() == 0) {
1052 return NULL;
1053 }
1054 ThreadToNativeFromVM ttn(thread);
1055 jobjectArray result = NULL;
1056 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1057 CHECK_JNI_EXCEPTION_(env, NULL);
1058 result = env->NewObjectArray(blobs.length(), clazz, NULL);
1059 if (result == NULL) {
1060 return result;
1061 }
1062 int i = 0;
1063 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1064 it != blobs.end(); ++it) {
1065 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1066 env->SetObjectArrayElement(result, i, obj);
1067 ++i;
1068 }
1069 return result;
1070 WB_END
1071
1072 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1073 return CompileBroker::get_compilation_activity_mode();
1074 WB_END
1075
1076 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1077 ThreadToNativeFromVM ttn(thread);
1078 CodeBlobStub stub((CodeBlob*) addr);
1079 return codeBlob2objectArray(thread, env, &stub);
1080 WB_END
1081
1082 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1083 return (jlong) Thread::current()->stack_size();
1084 WB_END
1085
1086 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1087 JavaThread* t = JavaThread::current();
1088 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
1089 WB_END
1090
1091 int WhiteBox::array_bytes_to_length(size_t bytes) {
1092 return Array<u1>::bytes_to_length(bytes);
1093 }
1094
1095 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1096 if (size < 0) {
1097 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1098 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1099 }
1100
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 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1107
1108 return (jlong)(uintptr_t)metadata;
1109 WB_END
1110
1111 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1112 oop class_loader_oop = JNIHandles::resolve(class_loader);
1113 ClassLoaderData* cld = class_loader_oop != NULL
1114 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1115 : ClassLoaderData::the_null_class_loader_data();
1116
1117 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1118 WB_END
1119
1120 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1121 if (inc < 0) {
1122 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1123 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1124 }
1125
1126 jlong max_size_t = (jlong) ((size_t) -1);
1127 if (inc > max_size_t) {
1128 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1129 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1130 }
1131
1132 size_t new_cap_until_GC = 0;
1133 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1134 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1135 if (!success) {
1136 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1137 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1138 "due to contention with another thread");
1139 }
1140 return (jlong) new_cap_until_GC;
1141 WB_END
1142
1143 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1144 return (jlong) MetaspaceGC::capacity_until_GC();
1145 WB_END
1146
1147 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1148 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1149 Monitor::_safepoint_check_always :
1150 Monitor::_safepoint_check_never;
1151 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1152 attemptedNoSafepointValue == JNI_TRUE);
1153 WB_END
1154
1155 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1156 oop obj_oop = JNIHandles::resolve(obj);
1157 return (jboolean) obj_oop->mark()->has_monitor();
1158 WB_END
1159
1160 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1161 VM_ForceSafepoint force_safepoint_op;
1162 VMThread::execute(&force_safepoint_op);
1163 WB_END
1164
1165 template <typename T>
1166 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1167 assert(value != NULL, "sanity");
1168 if (method == NULL || name == NULL) {
1169 return false;
1170 }
1171 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1172 CHECK_JNI_EXCEPTION_(env, false);
1173 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1174 // can't be in VM when we call JNI
1175 ThreadToNativeFromVM ttnfv(thread);
1176 const char* flag_name = env->GetStringUTFChars(name, NULL);
1177 bool result = CompilerOracle::has_option_value(mh, flag_name, *value);
1178 env->ReleaseStringUTFChars(name, flag_name);
1179 return result;
1180 }
1181
1182 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1183 bool result;
1184 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1185 // can't be in VM when we call JNI
1186 ThreadToNativeFromVM ttnfv(thread);
1187 return booleanBox(thread, env, result);
1188 }
1189 return NULL;
1190 WB_END
1191
1192 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1193 intx result;
1194 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1195 // can't be in VM when we call JNI
1196 ThreadToNativeFromVM ttnfv(thread);
1197 return longBox(thread, env, result);
1198 }
1199 return NULL;
1200 WB_END
1201
1202 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1203 uintx result;
1204 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1205 // can't be in VM when we call JNI
1206 ThreadToNativeFromVM ttnfv(thread);
1207 return longBox(thread, env, result);
1208 }
1209 return NULL;
1210 WB_END
1211
1212 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1213 double result;
1214 if (GetMethodOption <double> (thread, env, method, name, &result)) {
1215 // can't be in VM when we call JNI
1216 ThreadToNativeFromVM ttnfv(thread);
1217 return doubleBox(thread, env, result);
1218 }
1219 return NULL;
1220 WB_END
1221
1222 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1223 ccstr ccstrResult;
1224 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1225 // can't be in VM when we call JNI
1226 ThreadToNativeFromVM ttnfv(thread);
1227 jstring result = env->NewStringUTF(ccstrResult);
1228 CHECK_JNI_EXCEPTION_(env, NULL);
1229 return result;
1230 }
1231 return NULL;
1232 WB_END
1233
1234 //Some convenience methods to deal with objects from java
1235 int WhiteBox::offset_for_field(const char* field_name, oop object,
1236 Symbol* signature_symbol) {
1237 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1238 Thread* THREAD = Thread::current();
1239
1240 //Get the class of our object
1241 Klass* arg_klass = object->klass();
1242 //Turn it into an instance-klass
1243 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1244
1245 //Create symbols to look for in the class
1246 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1247 THREAD);
1248
1249 //To be filled in with an offset of the field we're looking for
1250 fieldDescriptor fd;
1251
1252 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1253 if (res == NULL) {
1254 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1255 name_symbol->as_C_string());
1256 fatal("Invalid layout of preloaded class");
1257 }
1258
1259 //fetch the field at the offset we've found
1260 int dest_offset = fd.offset();
1261
1262 return dest_offset;
1263 }
1264
1265
1266 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1267 int offset = offset_for_field(field_name, object,
1268 vmSymbols::string_signature());
1269 oop string = object->obj_field(offset);
1270 if (string == NULL) {
1271 return NULL;
1272 }
1273 const char* ret = java_lang_String::as_utf8_string(string);
1274 return ret;
1275 }
1276
1277 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1278 int offset =
1279 offset_for_field(field_name, object, vmSymbols::bool_signature());
1280 bool ret = (object->bool_field(offset) == JNI_TRUE);
1281 return ret;
1282 }
1283
1284 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1285 ResourceMark rm;
1286 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1287
1288 // one by one registration natives for exception catching
1289 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1290 CHECK_JNI_EXCEPTION(env);
1291 for (int i = 0, n = method_count; i < n; ++i) {
1292 // Skip dummy entries
1293 if (method_array[i].fnPtr == NULL) continue;
1294 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1295 jthrowable throwable_obj = env->ExceptionOccurred();
1296 if (throwable_obj != NULL) {
1297 env->ExceptionClear();
1298 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1299 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1300 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1301 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1302 method_array[i].name, method_array[i].signature);
1303 }
1304 } else {
1305 // Registration failed unexpectedly.
1306 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1307 method_array[i].name, method_array[i].signature);
1308 env->UnregisterNatives(wbclass);
1309 break;
1310 }
1311 }
1312 }
1313 }
1314
1315 #define CC (char*)
1316
1317 static JNINativeMethod methods[] = {
1318 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1319 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1320 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1321 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1322 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1323 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1324 {CC"parseCommandLine",
1325 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1326 (void*) &WB_ParseCommandLine
1327 },
1328 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V",
1329 (void*)&WB_AddToBootstrapClassLoaderSearch},
1330 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V",
1331 (void*)&WB_AddToSystemClassLoaderSearch},
1332 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1333 (void*)&WB_GetCompressedOopsMaxHeapSize},
1334 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1335 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1336 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1337 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1338 #if INCLUDE_ALL_GCS
1339 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1340 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1341 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1342 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1343 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1344 #endif // INCLUDE_ALL_GCS
1345 #if INCLUDE_NMT
1346 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1347 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1348 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1349 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1350 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1351 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1352 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1353 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1354 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1355 #endif // INCLUDE_NMT
1356 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
1357 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1358 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1359 (void*)&WB_DeoptimizeMethod },
1360 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1361 (void*)&WB_IsMethodCompiled },
1362 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1363 (void*)&WB_IsMethodCompilable},
1364 {CC"isMethodQueuedForCompilation",
1365 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1366 {CC"makeMethodNotCompilable",
1367 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1368 {CC"testSetDontInlineMethod",
1369 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1370 {CC"getMethodCompilationLevel",
1371 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1372 {CC"getMethodEntryBci",
1373 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1374 {CC"getCompileQueueSize",
1375 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1376 {CC"testSetForceInlineMethod",
1377 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1378 {CC"enqueueMethodForCompilation",
1379 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1380 {CC"clearMethodState",
1381 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1382 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1383 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1384 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1385 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1386 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1387 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1388 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1389 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1390 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1391 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1392 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1393 (void*)&WB_SetStringVMFlag},
1394 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1395 (void*)&WB_GetBooleanVMFlag},
1396 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1397 (void*)&WB_GetIntxVMFlag},
1398 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1399 (void*)&WB_GetUintxVMFlag},
1400 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1401 (void*)&WB_GetUint64VMFlag},
1402 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1403 (void*)&WB_GetSizeTVMFlag},
1404 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1405 (void*)&WB_GetDoubleVMFlag},
1406 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1407 (void*)&WB_GetStringVMFlag},
1408 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1409 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1410 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1411 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1412 {CC"allocateMetaspace",
1413 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1414 {CC"freeMetaspace",
1415 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1416 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1417 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1418 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1419 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1420 (void*)&WB_GetNMethod },
1421 {CC"forceNMethodSweep0", CC"()Ljava/lang/Thread;", (void*)&WB_ForceNMethodSweep },
1422 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1423 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1424 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1425 {CC"getCompilationActivityMode",
1426 CC"()I", (void*)&WB_GetCompilationActivityMode},
1427 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1428 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1429 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1430 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
1431 {CC"isMonitorInflated", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1432 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1433 {CC"getMethodBooleanOption",
1434 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1435 (void*)&WB_GetMethodBooleaneOption},
1436 {CC"getMethodIntxOption",
1437 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1438 (void*)&WB_GetMethodIntxOption},
1439 {CC"getMethodUintxOption",
1440 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1441 (void*)&WB_GetMethodUintxOption},
1442 {CC"getMethodDoubleOption",
1443 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1444 (void*)&WB_GetMethodDoubleOption},
1445 {CC"getMethodStringOption",
1446 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1447 (void*)&WB_GetMethodStringOption},
1448 };
1449
1450 #undef CC
1451
1452 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1453 {
1454 if (WhiteBoxAPI) {
1455 // Make sure that wbclass is loaded by the null classloader
1456 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1457 Handle loader(ikh->class_loader());
1458 if (loader.is_null()) {
1459 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1460 WhiteBox::register_extended(env, wbclass, thread);
1461 WhiteBox::set_used();
1462 }
1463 }
1464 }
1465 JVM_END