1 /*
2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26
27 #include "memory/universe.hpp"
28 #include "oops/oop.inline.hpp"
29
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/classLoaderData.hpp"
32
33 #include "prims/whitebox.hpp"
34 #include "prims/wbtestmethods/parserTests.hpp"
35
36 #include "runtime/arguments.hpp"
37 #include "runtime/interfaceSupport.hpp"
38 #include "runtime/os.hpp"
39 #include "utilities/debug.hpp"
40 #include "utilities/macros.hpp"
41 #include "utilities/exceptions.hpp"
42
43 #if INCLUDE_ALL_GCS
44 #include "gc_implementation/g1/concurrentMark.hpp"
45 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
46 #include "gc_implementation/g1/heapRegionRemSet.hpp"
47 #endif // INCLUDE_ALL_GCS
48
49 #ifdef INCLUDE_NMT
50 #include "services/memTracker.hpp"
51 #endif // INCLUDE_NMT
52
53 #include "compiler/compileBroker.hpp"
54 #include "runtime/compilationPolicy.hpp"
55
56 #define SIZE_T_MAX_VALUE ((size_t) -1)
57
58 bool WhiteBox::_used = false;
59
60 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
61 return (jlong)(void*)JNIHandles::resolve(obj);
62 WB_END
63
64 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
65 return heapOopSize;
66 WB_END
67
68
69 class WBIsKlassAliveClosure : public KlassClosure {
70 Symbol* _name;
71 bool _found;
72 public:
73 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
74
75 void do_klass(Klass* k) {
76 if (_found) return;
77 Symbol* ksym = k->name();
78 if (ksym->fast_compare(_name) == 0) {
79 _found = true;
80 }
81 }
82
83 bool found() const {
84 return _found;
85 }
86 };
87
88 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
89 Handle h_name = JNIHandles::resolve(name);
90 if (h_name.is_null()) return false;
91 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
92 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
93
94 WBIsKlassAliveClosure closure(sym);
95 ClassLoaderDataGraph::classes_do(&closure);
96
97 return closure.found();
98 WB_END
99
100 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
101 return (jlong)Arguments::max_heap_for_compressed_oops();
102 }
103 WB_END
104
105 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
106 CollectorPolicy * p = Universe::heap()->collector_policy();
107 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "SIZE_FORMAT" Maximum heap "SIZE_FORMAT
108 " Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
109 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
110 p->space_alignment(), p->heap_alignment());
111 }
112 WB_END
113
114 #ifndef PRODUCT
115 // Forward declaration
116 void TestReservedSpace_test();
117 void TestReserveMemorySpecial_test();
118 void TestVirtualSpace_test();
119 void TestMetaspaceAux_test();
120 #endif
121
122 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
123 #ifndef PRODUCT
124 TestReservedSpace_test();
125 TestReserveMemorySpecial_test();
126 TestVirtualSpace_test();
127 TestMetaspaceAux_test();
128 #endif
129 WB_END
130
131 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
132 size_t granularity = os::vm_allocation_granularity();
133 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
134 VirtualSpace vs;
135 vs.initialize(rhs, 50 * granularity);
136
137 //Check if constraints are complied
138 if (!( UseCompressedOops && rhs.base() != NULL &&
139 Universe::narrow_oop_base() != NULL &&
140 Universe::narrow_oop_use_implicit_null_checks() )) {
141 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
142 "\tUseCompressedOops is %d\n"
143 "\trhs.base() is "PTR_FORMAT"\n"
144 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
145 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
146 UseCompressedOops,
147 rhs.base(),
148 Universe::narrow_oop_base(),
149 Universe::narrow_oop_use_implicit_null_checks());
150 return;
151 }
152 tty->print_cr("Reading from no access area... ");
153 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
154 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
155 WB_END
156
157 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
158 size_t magnitude, size_t iterations) {
159 size_t granularity = os::vm_allocation_granularity();
160 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
161 VirtualSpace vs;
162 if (!vs.initialize(rhs, 0)) {
163 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
164 return 3;
165 }
166
167 long seed = os::random();
168 tty->print_cr("Random seed is %ld", seed);
169 os::init_random(seed);
170
171 for (size_t i = 0; i < iterations; i++) {
172
173 // Whether we will shrink or grow
174 bool shrink = os::random() % 2L == 0;
175
176 // Get random delta to resize virtual space
177 size_t delta = (size_t)os::random() % magnitude;
178
179 // If we are about to shrink virtual space below zero, then expand instead
180 if (shrink && vs.committed_size() < delta) {
181 shrink = false;
182 }
183
184 // Resizing by delta
185 if (shrink) {
186 vs.shrink_by(delta);
187 } else {
188 // If expanding fails expand_by will silently return false
189 vs.expand_by(delta, true);
190 }
191 }
192 return 0;
193 }
194
195 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
196 jlong reserved_space_size, jlong magnitude, jlong iterations))
197 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
198 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
199 iterations);
200 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
201 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
202 return 1;
203 }
204
205 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
206 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
207 if (sizeof(size_t) < sizeof(jlong)) {
208 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
209 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
210 || iterations > size_t_max_value) {
211 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
212 return 2;
213 }
214 }
215
216 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
217 (size_t) magnitude, (size_t) iterations);
218 WB_END
219
220 #if INCLUDE_ALL_GCS
221 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
222 G1CollectedHeap* g1 = G1CollectedHeap::heap();
223 oop result = JNIHandles::resolve(obj);
224 const HeapRegion* hr = g1->heap_region_containing(result);
225 return hr->isHumongous();
226 WB_END
227
228 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
229 G1CollectedHeap* g1 = G1CollectedHeap::heap();
230 size_t nr = g1->free_regions();
231 return (jlong)nr;
232 WB_END
233
234 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
235 G1CollectedHeap* g1 = G1CollectedHeap::heap();
236 ConcurrentMark* cm = g1->concurrent_mark();
237 return cm->concurrent_marking_in_progress();
238 WB_END
239
240 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
241 return (jint)HeapRegion::GrainBytes;
242 WB_END
243 #endif // INCLUDE_ALL_GCS
244
245 #if INCLUDE_NMT
246 // Alloc memory using the test memory type so that we can use that to see if
247 // NMT picks it up correctly
248 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
249 jlong addr = 0;
250
251 if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) {
252 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
253 }
254
255 return addr;
256 WB_END
257
258 // Free the memory allocated by NMTAllocTest
259 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
260 os::free((void*)(uintptr_t)mem, mtTest);
261 WB_END
262
263 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
264 jlong addr = 0;
265
266 if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) {
267 addr = (jlong)(uintptr_t)os::reserve_memory(size);
268 MemTracker::record_virtual_memory_type((address)addr, mtTest);
269 }
270
271 return addr;
272 WB_END
273
274
275 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
276 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
277 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
278 WB_END
279
280 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
281 os::uncommit_memory((char *)(uintptr_t)addr, size);
282 WB_END
283
284 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
285 os::release_memory((char *)(uintptr_t)addr, size);
286 WB_END
287
288 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature
289 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env))
290
291 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
292 return false;
293 }
294
295 return MemTracker::wbtest_wait_for_data_merge();
296 WB_END
297
298 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
299 return MemTracker::tracking_level() == MemTracker::NMT_detail;
300 WB_END
301
302 #endif // INCLUDE_NMT
303
304 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
305 assert(method != NULL, "method should not be null");
306 ThreadToNativeFromVM ttn(thread);
307 return env->FromReflectedMethod(method);
308 }
309
310 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
311 MutexLockerEx mu(Compile_lock);
312 CodeCache::mark_all_nmethods_for_deoptimization();
313 VM_Deoptimize op;
314 VMThread::execute(&op);
315 WB_END
316
317 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
318 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
319 MutexLockerEx mu(Compile_lock);
320 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
321 int result = 0;
322 nmethod* code;
323 if (is_osr) {
324 int bci = InvocationEntryBci;
325 while ((code = mh->lookup_osr_nmethod_for(bci, CompLevel_none, false)) != NULL) {
326 code->mark_for_deoptimization();
327 ++result;
328 bci = code->osr_entry_bci() + 1;
329 }
330 } else {
331 code = mh->code();
332 }
333 if (code != NULL) {
334 code->mark_for_deoptimization();
335 ++result;
336 }
337 result += CodeCache::mark_for_deoptimization(mh());
338 if (result > 0) {
339 VM_Deoptimize op;
340 VMThread::execute(&op);
341 }
342 return result;
343 WB_END
344
345 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
346 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
347 MutexLockerEx mu(Compile_lock);
348 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
349 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
350 if (code == NULL) {
351 return JNI_FALSE;
352 }
353 return (code->is_alive() && !code->is_marked_for_deoptimization());
354 WB_END
355
356 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
357 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
358 MutexLockerEx mu(Compile_lock);
359 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
360 if (is_osr) {
361 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
362 } else {
363 return CompilationPolicy::can_be_compiled(mh, comp_level);
364 }
365 WB_END
366
367 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
368 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
369 MutexLockerEx mu(Compile_lock);
370 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
371 return mh->queued_for_compilation();
372 WB_END
373
374 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
375 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
376 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
377 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
378 return (code != NULL ? code->comp_level() : CompLevel_none);
379 WB_END
380
381 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
382 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
383 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
384 if (is_osr) {
385 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
386 } else {
387 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
388 }
389 WB_END
390
391 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
392 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
393 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
394 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
395 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
396 WB_END
397
398 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
399 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
400 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
401 bool result = mh->dont_inline();
402 mh->set_dont_inline(value == JNI_TRUE);
403 return result;
404 WB_END
405
406 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
407 if (comp_level == CompLevel_any) {
408 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
409 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
410 } else {
411 return CompileBroker::queue_size(comp_level);
412 }
413 WB_END
414
415 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
416 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
417 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
418 bool result = mh->force_inline();
419 mh->set_force_inline(value == JNI_TRUE);
420 return result;
421 WB_END
422
423 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
424 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
425 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
426 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
427 MutexLockerEx mu(Compile_lock);
428 return (mh->queued_for_compilation() || nm != NULL);
429 WB_END
430
431 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
432 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
433 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
434 MutexLockerEx mu(Compile_lock);
435 MethodData* mdo = mh->method_data();
436 MethodCounters* mcs = mh->method_counters();
437
438 if (mdo != NULL) {
439 mdo->init();
440 ResourceMark rm;
441 int arg_count = mdo->method()->size_of_parameters();
442 for (int i = 0; i < arg_count; i++) {
443 mdo->set_arg_modified(i, 0);
444 }
445 }
446
447 mh->clear_not_c1_compilable();
448 mh->clear_not_c2_compilable();
449 mh->clear_not_c2_osr_compilable();
450 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
451 if (mcs != NULL) {
452 mcs->backedge_counter()->init();
453 mcs->invocation_counter()->init();
454 mcs->set_interpreter_invocation_count(0);
455 mcs->set_interpreter_throwout_count(0);
456
457 #ifdef TIERED
458 mcs->set_rate(0.0F);
459 mh->set_prev_event_count(0, THREAD);
460 mh->set_prev_time(0, THREAD);
461 #endif
462 }
463 WB_END
464
465 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
466 ResourceMark rm(THREAD);
467 int len;
468 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
469 return (StringTable::lookup(name, len) != NULL);
470 WB_END
471
472 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
473 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
474 Universe::heap()->collect(GCCause::_last_ditch_collection);
475 WB_END
476
477
478 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
479 // static+volatile in order to force the read to happen
480 // (not be eliminated by the compiler)
481 static char c;
482 static volatile char* p;
483
484 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
485 if (p == NULL) {
486 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
487 }
488
489 c = *p;
490 WB_END
491
492 //Some convenience methods to deal with objects from java
493 int WhiteBox::offset_for_field(const char* field_name, oop object,
494 Symbol* signature_symbol) {
495 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
496 Thread* THREAD = Thread::current();
497
498 //Get the class of our object
499 Klass* arg_klass = object->klass();
500 //Turn it into an instance-klass
501 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
502
503 //Create symbols to look for in the class
504 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
505 THREAD);
506
507 //To be filled in with an offset of the field we're looking for
508 fieldDescriptor fd;
509
510 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
511 if (res == NULL) {
512 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
513 name_symbol->as_C_string());
514 fatal("Invalid layout of preloaded class");
515 }
516
517 //fetch the field at the offset we've found
518 int dest_offset = fd.offset();
519
520 return dest_offset;
521 }
522
523
524 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
525 int offset = offset_for_field(field_name, object,
526 vmSymbols::string_signature());
527 oop string = object->obj_field(offset);
528 if (string == NULL) {
529 return NULL;
530 }
531 const char* ret = java_lang_String::as_utf8_string(string);
532 return ret;
533 }
534
535 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
536 int offset =
537 offset_for_field(field_name, object, vmSymbols::bool_signature());
538 bool ret = (object->bool_field(offset) == JNI_TRUE);
539 return ret;
540 }
541
542
543 #define CC (char*)
544
545 static JNINativeMethod methods[] = {
546 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
547 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
548 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
549 {CC"parseCommandLine",
550 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
551 (void*) &WB_ParseCommandLine
552 },
553 {CC"getCompressedOopsMaxHeapSize", CC"()J",
554 (void*)&WB_GetCompressedOopsMaxHeapSize},
555 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
556 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
557 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
558 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
559 #if INCLUDE_ALL_GCS
560 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
561 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
562 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
563 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
564 #endif // INCLUDE_ALL_GCS
565 #if INCLUDE_NMT
566 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
567 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
568 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
569 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
570 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
571 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
572 {CC"NMTWaitForDataMerge", CC"()Z", (void*)&WB_NMTWaitForDataMerge},
573 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
574 #endif // INCLUDE_NMT
575 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
576 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
577 (void*)&WB_DeoptimizeMethod },
578 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
579 (void*)&WB_IsMethodCompiled },
580 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
581 (void*)&WB_IsMethodCompilable},
582 {CC"isMethodQueuedForCompilation",
583 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
584 {CC"makeMethodNotCompilable",
585 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
586 {CC"testSetDontInlineMethod",
587 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
588 {CC"getMethodCompilationLevel",
589 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
590 {CC"getMethodEntryBci",
591 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
592 {CC"getCompileQueueSize",
593 CC"(I)I", (void*)&WB_GetCompileQueueSize},
594 {CC"testSetForceInlineMethod",
595 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
596 {CC"enqueueMethodForCompilation",
597 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
598 {CC"clearMethodState",
599 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
600 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
601 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
602 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
603 };
604
605 #undef CC
606
607 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
608 {
609 if (WhiteBoxAPI) {
610 // Make sure that wbclass is loaded by the null classloader
611 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
612 Handle loader(ikh->class_loader());
613 if (loader.is_null()) {
614 ResourceMark rm;
615 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
616 bool result = true;
617 // one by one registration natives for exception catching
618 jclass exceptionKlass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
619 for (int i = 0, n = sizeof(methods) / sizeof(methods[0]); i < n; ++i) {
620 if (env->RegisterNatives(wbclass, methods + i, 1) != 0) {
621 result = false;
622 if (env->ExceptionCheck() && env->IsInstanceOf(env->ExceptionOccurred(), exceptionKlass)) {
623 // j.l.NoSuchMethodError is thrown when a method can't be found or a method is not native
624 // ignoring the exception
625 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s", methods[i].name, methods[i].signature);
626 env->ExceptionClear();
627 } else {
628 // register is failed w/o exception or w/ unexpected exception
629 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered", methods[i].name, methods[i].signature);
630 env->UnregisterNatives(wbclass);
631 break;
632 }
633 }
634 }
635
636 if (result) {
637 WhiteBox::set_used();
638 }
639 }
640 }
641 }
642 JVM_END