1 /*
2 * Copyright (c) 2012, 2025, 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 "cds.h"
26 #include "cds/aotMappedHeapLoader.hpp"
27 #include "cds/aotMetaspace.hpp"
28 #include "cds/cdsConstants.hpp"
29 #include "cds/filemap.hpp"
30 #include "cds/heapShared.inline.hpp"
31 #include "classfile/classLoader.hpp"
32 #include "classfile/classLoaderDataGraph.hpp"
33 #include "classfile/classLoaderStats.hpp"
34 #include "classfile/classPrinter.hpp"
35 #include "classfile/javaClasses.inline.hpp"
36 #include "classfile/modules.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/codeCache.hpp"
42 #include "code/compiledIC.hpp"
43 #include "compiler/compilationPolicy.hpp"
44 #include "compiler/compilerOracle.hpp"
45 #include "compiler/directivesParser.hpp"
46 #include "compiler/methodMatcher.hpp"
47 #include "gc/shared/concurrentGCBreakpoints.hpp"
48 #include "gc/shared/gcConfig.hpp"
49 #include "gc/shared/genArguments.hpp"
50 #include "jfr/periodic/sampling/jfrCPUTimeThreadSampler.hpp"
51 #include "jvm.h"
52 #include "jvmtifiles/jvmtiEnv.hpp"
53 #include "logging/log.hpp"
54 #include "memory/iterator.hpp"
55 #include "memory/iterator.inline.hpp"
56 #include "memory/memoryReserver.hpp"
57 #include "memory/metadataFactory.hpp"
58 #include "memory/metaspace/testHelpers.hpp"
59 #include "memory/metaspaceUtils.hpp"
60 #include "memory/oopFactory.hpp"
61 #include "memory/resourceArea.hpp"
62 #include "memory/universe.hpp"
63 #include "nmt/mallocSiteTable.hpp"
64 #include "oops/access.hpp"
65 #include "oops/array.hpp"
66 #include "oops/compressedOops.hpp"
67 #include "oops/compressedOops.inline.hpp"
68 #include "oops/constantPool.inline.hpp"
69 #include "oops/klass.inline.hpp"
70 #include "oops/method.inline.hpp"
71 #include "oops/methodData.inline.hpp"
72 #include "oops/objArrayKlass.hpp"
73 #include "oops/objArrayOop.inline.hpp"
74 #include "oops/oop.inline.hpp"
75 #include "oops/typeArrayOop.inline.hpp"
76 #include "prims/jvmtiEnvBase.hpp"
77 #include "prims/resolvedMethodTable.hpp"
78 #include "prims/wbtestmethods/parserTests.hpp"
79 #include "prims/whitebox.inline.hpp"
80 #include "runtime/arguments.hpp"
81 #include "runtime/atomicAccess.hpp"
82 #include "runtime/deoptimization.hpp"
83 #include "runtime/fieldDescriptor.inline.hpp"
84 #include "runtime/flags/jvmFlag.hpp"
85 #include "runtime/flags/jvmFlagAccess.hpp"
86 #include "runtime/frame.inline.hpp"
87 #include "runtime/handles.inline.hpp"
88 #include "runtime/handshake.hpp"
89 #include "runtime/interfaceSupport.inline.hpp"
90 #include "runtime/javaCalls.hpp"
91 #include "runtime/javaThread.inline.hpp"
92 #include "runtime/jniHandles.inline.hpp"
93 #include "runtime/keepStackGCProcessed.hpp"
94 #include "runtime/lockStack.hpp"
95 #include "runtime/os.hpp"
96 #include "runtime/stackFrameStream.inline.hpp"
97 #include "runtime/synchronizer.hpp"
98 #include "runtime/threadSMR.hpp"
99 #include "runtime/vframe.hpp"
100 #include "runtime/vm_version.hpp"
101 #include "services/memoryService.hpp"
102 #include "utilities/align.hpp"
103 #include "utilities/checkedCast.hpp"
104 #include "utilities/debug.hpp"
105 #include "utilities/elfFile.hpp"
106 #include "utilities/exceptions.hpp"
107 #include "utilities/macros.hpp"
108 #include "utilities/nativeCallStack.hpp"
109 #include "utilities/ostream.hpp"
110 #include "utilities/vmError.hpp"
111 #if INCLUDE_G1GC
112 #include "gc/g1/g1Arguments.hpp"
113 #include "gc/g1/g1CollectedHeap.inline.hpp"
114 #include "gc/g1/g1ConcurrentMark.hpp"
115 #include "gc/g1/g1ConcurrentMarkThread.inline.hpp"
116 #include "gc/g1/g1HeapRegionManager.hpp"
117 #include "gc/g1/g1HeapRegionRemSet.inline.hpp"
118 #endif // INCLUDE_G1GC
119 #if INCLUDE_PARALLELGC
120 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
121 #endif // INCLUDE_PARALLELGC
122 #if INCLUDE_SERIALGC
123 #include "gc/serial/serialHeap.hpp"
124 #endif // INCLUDE_SERIALGC
125 #if INCLUDE_ZGC
126 #include "gc/z/zAddress.inline.hpp"
127 #include "gc/z/zHeap.inline.hpp"
128 #endif // INCLUDE_ZGC
129 #if INCLUDE_JVMCI
130 #include "jvmci/jvmciEnv.hpp"
131 #include "jvmci/jvmciRuntime.hpp"
132 #endif
133 #ifdef LINUX
134 #include "cgroupSubsystem_linux.hpp"
135 #include "os_linux.hpp"
136 #include "osContainer_linux.hpp"
137 #endif
138
139 #define CHECK_JNI_EXCEPTION_(env, value) \
140 do { \
141 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
142 THREAD->clear_pending_jni_exception_check(); \
143 if (HAS_PENDING_EXCEPTION) { \
144 return(value); \
145 } \
146 } while (0)
147
148 #define CHECK_JNI_EXCEPTION(env) \
149 do { \
150 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
151 THREAD->clear_pending_jni_exception_check(); \
152 if (HAS_PENDING_EXCEPTION) { \
153 return; \
154 } \
155 } while (0)
156
157 bool WhiteBox::_used = false;
158 volatile bool WhiteBox::compilation_locked = false;
159
160 class VM_WhiteBoxOperation : public VM_Operation {
161 public:
162 VM_WhiteBoxOperation() { }
163 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
164 bool allow_nested_vm_operations() const { return true; }
165 };
166
167
168 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
169 return (jlong)(void*)JNIHandles::resolve(obj);
170 WB_END
171
172 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
173 return heapOopSize;
174 WB_END
175
176 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
177 return (jint)os::vm_page_size();
178 WB_END
179
180 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
181 return os::vm_allocation_granularity();
182 WB_END
183
184 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
185 return os::large_page_size();
186 WB_END
187
188 WB_ENTRY(jstring, WB_PrintString(JNIEnv* env, jobject wb, jstring str, jint max_length))
189 ResourceMark rm(THREAD);
190 stringStream sb;
191 java_lang_String::print(JNIHandles::resolve(str), &sb, max_length);
192 oop result = java_lang_String::create_oop_from_str(sb.as_string(), THREAD);
193 return (jstring) JNIHandles::make_local(THREAD, result);
194 WB_END
195
196 WB_ENTRY(jint, WB_TakeLockAndHangInSafepoint(JNIEnv* env, jobject wb))
197 JavaThread* self = JavaThread::current();
198 // VMStatistic_lock is used to minimize interference with VM locking
199 MutexLocker mu(VMStatistic_lock);
200 VM_HangInSafepoint force_safepoint_stuck_op;
201 VMThread::execute(&force_safepoint_stuck_op);
202 ShouldNotReachHere();
203 return 0;
204 WB_END
205
206 WB_ENTRY(jlong, WB_GetMinimumJavaStackSize(JNIEnv* env, jobject o))
207 return os::get_minimum_java_stack_size();
208 WB_END
209
210 class WBIsKlassAliveClosure : public LockedClassesDo {
211 Symbol* _name;
212 int _count;
213 public:
214 WBIsKlassAliveClosure(Symbol* name) : _name(name), _count(0) {}
215
216 void do_klass(Klass* k) {
217 Symbol* ksym = k->name();
218 if (ksym->fast_compare(_name) == 0) {
219 _count++;
220 } else if (k->is_instance_klass()) {
221 // Need special handling for hidden classes because the JVM
222 // appends "+<hex-address>" to hidden class names.
223 InstanceKlass *ik = InstanceKlass::cast(k);
224 if (ik->is_hidden()) {
225 ResourceMark rm;
226 char* k_name = ksym->as_C_string();
227 // Find the first '+' char and truncate the string at that point.
228 // NOTE: This will not work correctly if the original hidden class
229 // name contains a '+'.
230 char* plus_char = strchr(k_name, '+');
231 if (plus_char != nullptr) {
232 *plus_char = 0;
233 char* c_name = _name->as_C_string();
234 if (strcmp(c_name, k_name) == 0) {
235 _count++;
236 }
237 }
238 }
239 }
240 }
241
242 int count() const {
243 return _count;
244 }
245 };
246
247 WB_ENTRY(jint, WB_CountAliveClasses(JNIEnv* env, jobject target, jstring name))
248 oop h_name = JNIHandles::resolve(name);
249 if (h_name == nullptr) {
250 return 0;
251 }
252 Symbol* sym = java_lang_String::as_symbol(h_name);
253 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
254
255 WBIsKlassAliveClosure closure(sym);
256 ClassLoaderDataGraph::classes_do(&closure);
257
258 // Return the count of alive classes with this name.
259 return closure.count();
260 WB_END
261
262 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
263 oop h_name = JNIHandles::resolve(name);
264 if (h_name == nullptr) {
265 return 0;
266 }
267 Symbol* sym = java_lang_String::as_symbol(h_name);
268 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
269 return (jint)sym->refcount();
270 WB_END
271
272
273 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
274 #if INCLUDE_JVMTI
275 ResourceMark rm;
276 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
277 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
278 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
279 assert(err == JVMTI_ERROR_NONE, "must not fail");
280 #endif
281 }
282 WB_END
283
284 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
285 #if INCLUDE_JVMTI
286 ResourceMark rm;
287 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
288 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
289 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
290 assert(err == JVMTI_ERROR_NONE, "must not fail");
291 #endif
292 }
293 WB_END
294
295
296 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
297 return (jlong)Arguments::max_heap_for_compressed_oops();
298 }
299 WB_END
300
301 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
302 tty->print_cr("Minimum heap %zu Initial heap %zu "
303 "Maximum heap %zu Space alignment %zu Heap alignment %zu",
304 MinHeapSize,
305 InitialHeapSize,
306 MaxHeapSize,
307 SpaceAlignment,
308 HeapAlignment);
309 }
310 WB_END
311
312 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
313 size_t granularity = os::vm_allocation_granularity();
314 ReservedHeapSpace rhs = HeapReserver::reserve(100 * granularity, granularity, os::vm_page_size(), nullptr);
315
316 // Check if constraints are complied
317 if (!( UseCompressedOops && rhs.is_reserved() &&
318 CompressedOops::base() != nullptr &&
319 CompressedOops::use_implicit_null_checks() )) {
320 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
321 "\tUseCompressedOops is %d\n"
322 "\trhs.base() is " PTR_FORMAT "\n"
323 "\tCompressedOops::base() is " PTR_FORMAT "\n"
324 "\tCompressedOops::use_implicit_null_checks() is %d",
325 UseCompressedOops,
326 p2i(rhs.base()),
327 p2i(CompressedOops::base()),
328 CompressedOops::use_implicit_null_checks());
329 return;
330 }
331
332 VirtualSpace vs;
333 vs.initialize(rhs, 50 * granularity);
334
335 tty->print_cr("Reading from no access area... ");
336 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
337 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
338 WB_END
339
340 WB_ENTRY(void, WB_DecodeNKlassAndAccessKlass(JNIEnv* env, jobject o, jint nKlass))
341 assert(UseCompressedClassPointers, "Should only call for UseCompressedClassPointers");
342 const narrowKlass nk = (narrowKlass)nKlass;
343 const Klass* const k = CompressedKlassPointers::decode_not_null_without_asserts(nKlass);
344 printf("WB_DecodeNKlassAndAccessKlass: nk %u k " PTR_FORMAT "\n", nk, p2i(k));
345 printf("Will attempt to crash now...\n");
346 fflush(stdout); // flush now - we will crash below
347 // Access k by calling a virtual function - will result in loading the vtable from *k
348 k->print_on(tty);
349 WB_END
350
351 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
352 size_t magnitude, size_t iterations) {
353 size_t granularity = os::vm_allocation_granularity();
354 ReservedHeapSpace rhs = HeapReserver::reserve(reserved_space_size * granularity, granularity, os::vm_page_size(), nullptr);
355 if (!rhs.is_reserved()) {
356 tty->print_cr("Failed to initialize ReservedSpace. Can't proceed.");
357 return 3;
358 }
359
360 VirtualSpace vs;
361 if (!vs.initialize(rhs, 0)) {
362 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
363 return 3;
364 }
365
366 int seed = os::random();
367 tty->print_cr("Random seed is %d", seed);
368
369 for (size_t i = 0; i < iterations; i++) {
370
371 // Whether we will shrink or grow
372 bool shrink = os::random() % 2L == 0;
373
374 // Get random delta to resize virtual space
375 size_t delta = (size_t)os::random() % magnitude;
376
377 // If we are about to shrink virtual space below zero, then expand instead
378 if (shrink && vs.committed_size() < delta) {
379 shrink = false;
380 }
381
382 // Resizing by delta
383 if (shrink) {
384 vs.shrink_by(delta);
385 } else {
386 // If expanding fails expand_by will silently return false
387 vs.expand_by(delta, true);
388 }
389 }
390 return 0;
391 }
392
393 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
394 jlong reserved_space_size, jlong magnitude, jlong iterations))
395 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
396 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
397 iterations);
398 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
399 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
400 return 1;
401 }
402
403 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
404 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
405 if (sizeof(size_t) < sizeof(jlong)) {
406 jlong size_t_max_value = (jlong)SIZE_MAX;
407 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
408 || iterations > size_t_max_value) {
409 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
410 return 2;
411 }
412 }
413
414 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
415 (size_t) magnitude, (size_t) iterations);
416 WB_END
417
418 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
419 return GCConfig::is_gc_supported((CollectedHeap::Name)name);
420 WB_END
421
422 WB_ENTRY(jboolean, WB_HasLibgraal(JNIEnv* env, jobject o))
423 #if INCLUDE_JVMCI
424 return JVMCI::shared_library_exists();
425 #endif
426 return false;
427 WB_END
428
429 WB_ENTRY(jboolean, WB_IsGCSupportedByJVMCICompiler(JNIEnv* env, jobject o, jint name))
430 #if INCLUDE_JVMCI
431 if (EnableJVMCI) {
432 // Enter the JVMCI env that will be used by the CompileBroker.
433 JVMCIEnv jvmciEnv(thread, __FILE__, __LINE__);
434 return jvmciEnv.init_error() == JNI_OK && jvmciEnv.runtime()->is_gc_supported(&jvmciEnv, (CollectedHeap::Name)name);
435 }
436 #endif
437 return false;
438 WB_END
439
440 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
441 return GCConfig::is_gc_selected((CollectedHeap::Name)name);
442 WB_END
443
444 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
445 return GCConfig::is_gc_selected_ergonomically();
446 WB_END
447
448 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
449 oop p = JNIHandles::resolve(obj);
450 #if INCLUDE_G1GC
451 if (UseG1GC) {
452 G1CollectedHeap* g1h = G1CollectedHeap::heap();
453 const G1HeapRegion* hr = g1h->heap_region_containing(p);
454 return hr->is_old_or_humongous();
455 }
456 #endif
457 #if INCLUDE_PARALLELGC
458 if (UseParallelGC) {
459 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
460 return !psh->is_in_young(p);
461 }
462 #endif
463 #if INCLUDE_ZGC
464 if (UseZGC) {
465 return ZHeap::heap()->is_old(to_zaddress(p));
466 }
467 #endif
468 #if INCLUDE_SHENANDOAHGC
469 if (UseShenandoahGC) {
470 ShenandoahHeap* sh = ShenandoahHeap::heap();
471 return sh->mode()->is_generational() ? sh->is_in_old(p) : sh->is_in(p);
472 }
473 #endif
474 #if INCLUDE_SERIALGC
475 if (UseSerialGC) {
476 return !SerialHeap::heap()->is_in_young(p);
477 }
478 #endif
479 ShouldNotReachHere();
480 return false;
481 WB_END
482
483 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
484 oop p = JNIHandles::resolve(obj);
485 return p->size() * HeapWordSize;
486 WB_END
487
488 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
489 return (jlong)SpaceAlignment;
490 WB_END
491
492 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
493 return (jlong)HeapAlignment;
494 WB_END
495
496 WB_ENTRY(jboolean, WB_SupportsConcurrentGCBreakpoints(JNIEnv* env, jobject o))
497 return Universe::heap()->supports_concurrent_gc_breakpoints();
498 WB_END
499
500 WB_ENTRY(void, WB_ConcurrentGCAcquireControl(JNIEnv* env, jobject o))
501 ConcurrentGCBreakpoints::acquire_control();
502 WB_END
503
504 WB_ENTRY(void, WB_ConcurrentGCReleaseControl(JNIEnv* env, jobject o))
505 ConcurrentGCBreakpoints::release_control();
506 WB_END
507
508 WB_ENTRY(void, WB_ConcurrentGCRunToIdle(JNIEnv* env, jobject o))
509 ConcurrentGCBreakpoints::run_to_idle();
510 WB_END
511
512 WB_ENTRY(jboolean, WB_ConcurrentGCRunTo(JNIEnv* env, jobject o, jobject at))
513 Handle h_name(THREAD, JNIHandles::resolve(at));
514 ResourceMark rm;
515 const char* c_name = java_lang_String::as_utf8_string(h_name());
516 return ConcurrentGCBreakpoints::run_to(c_name);
517 WB_END
518
519 WB_ENTRY(jboolean, WB_ShipDebugInfoFull(JNIEnv* env, jobject o))
520 #if defined(SHIP_DEBUGINFO_FULL)
521 return true;
522 #else
523 return false;
524 #endif
525 WB_END
526
527 WB_ENTRY(jboolean, WB_ShipDebugInfoPublic(JNIEnv* env, jobject o))
528 #if defined(SHIP_DEBUGINFO_PUBLIC)
529 return true;
530 #else
531 return false;
532 #endif
533 WB_END
534
535 #if INCLUDE_G1GC
536
537 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
538 if (UseG1GC) {
539 G1CollectedHeap* g1h = G1CollectedHeap::heap();
540 oop result = JNIHandles::resolve(obj);
541 const G1HeapRegion* hr = g1h->heap_region_containing(result);
542 return hr->is_humongous();
543 }
544 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
545 WB_END
546
547 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
548 if (UseG1GC) {
549 G1CollectedHeap* g1h = G1CollectedHeap::heap();
550 const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
551 return hr->is_humongous();
552 }
553 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
554 WB_END
555
556 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
557 if (UseG1GC) {
558 G1CollectedHeap* g1h = G1CollectedHeap::heap();
559 const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
560 return hr->is_free();
561 }
562 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
563 WB_END
564
565 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
566 if (UseG1GC) {
567 G1CollectedHeap* g1h = G1CollectedHeap::heap();
568 size_t nr = g1h->max_num_regions();
569 return (jlong)nr;
570 }
571 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
572 WB_END
573
574 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
575 if (UseG1GC) {
576 G1CollectedHeap* g1h = G1CollectedHeap::heap();
577 size_t nr = g1h->num_free_regions();
578 return (jlong)nr;
579 }
580 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
581 WB_END
582
583 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
584 if (UseG1GC) {
585 G1CollectedHeap* g1h = G1CollectedHeap::heap();
586 return g1h->concurrent_mark()->cm_thread()->in_progress();
587 }
588 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
589 WB_END
590
591 WB_ENTRY(jint, WB_G1CompletedConcurrentMarkCycles(JNIEnv* env, jobject o))
592 if (UseG1GC) {
593 G1CollectedHeap* g1h = G1CollectedHeap::heap();
594 G1ConcurrentMark* cm = g1h->concurrent_mark();
595 return cm->completed_mark_cycles();
596 }
597 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1CompletedConcurrentMarkCycles: G1 GC is not enabled");
598 WB_END
599
600 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
601 if (UseG1GC) {
602 return (jint)G1HeapRegion::GrainBytes;
603 }
604 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
605 WB_END
606
607 WB_ENTRY(jboolean, WB_G1HasRegionsToUncommit(JNIEnv* env, jobject o))
608 if (UseG1GC) {
609 return G1CollectedHeap::heap()->has_uncommittable_regions();
610 }
611 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1HasRegionsToUncommit: G1 GC is not enabled");
612 WB_END
613
614 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
615 if (UseG1GC) {
616 ResourceMark rm(THREAD);
617 G1CollectedHeap* g1h = G1CollectedHeap::heap();
618 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
619 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
620 return JNIHandles::make_local(THREAD, h());
621 }
622 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
623 WB_END
624
625 WB_ENTRY(jint, WB_G1ActiveMemoryNodeCount(JNIEnv* env, jobject o))
626 if (UseG1GC) {
627 G1NUMA* numa = G1NUMA::numa();
628 return (jint)numa->num_active_nodes();
629 }
630 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1ActiveMemoryNodeCount: G1 GC is not enabled");
631 WB_END
632
633 WB_ENTRY(jintArray, WB_G1MemoryNodeIds(JNIEnv* env, jobject o))
634 if (UseG1GC) {
635 G1NUMA* numa = G1NUMA::numa();
636 int num_node_ids = checked_cast<int>(numa->num_active_nodes());
637 const uint* node_ids = numa->node_ids();
638
639 typeArrayOop result = oopFactory::new_intArray(num_node_ids, CHECK_NULL);
640 for (int i = 0; i < num_node_ids; i++) {
641 result->int_at_put(i, checked_cast<jint>(node_ids[i]));
642 }
643 return (jintArray) JNIHandles::make_local(THREAD, result);
644 }
645 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1MemoryNodeIds: G1 GC is not enabled");
646 WB_END
647
648 class OldRegionsLivenessClosure: public G1HeapRegionClosure {
649
650 private:
651 const int _liveness;
652 size_t _total_count;
653 size_t _total_memory;
654 size_t _total_memory_to_free;
655
656 public:
657 OldRegionsLivenessClosure(int liveness) :
658 _liveness(liveness),
659 _total_count(0),
660 _total_memory(0),
661 _total_memory_to_free(0) { }
662
663 size_t total_count() { return _total_count; }
664 size_t total_memory() { return _total_memory; }
665 size_t total_memory_to_free() { return _total_memory_to_free; }
666
667 bool do_heap_region(G1HeapRegion* r) {
668 if (r->is_old()) {
669 size_t live = r->live_bytes();
670 size_t size = r->used();
671 size_t reg_size = G1HeapRegion::GrainBytes;
672 if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
673 _total_memory += size;
674 ++_total_count;
675 if (size == reg_size) {
676 // We don't include non-full regions since they are unlikely included in mixed gc
677 // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
678 _total_memory_to_free += size - live;
679 }
680 }
681 }
682 return false;
683 }
684 };
685
686
687 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
688 if (!UseG1GC) {
689 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
690 }
691 if (liveness < 0) {
692 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
693 }
694
695 G1CollectedHeap* g1h = G1CollectedHeap::heap();
696 OldRegionsLivenessClosure rli(liveness);
697 g1h->heap_region_iterate(&rli);
698
699 typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
700 result->long_at_put(0, rli.total_count());
701 result->long_at_put(1, rli.total_memory());
702 result->long_at_put(2, rli.total_memory_to_free());
703 return (jlongArray) JNIHandles::make_local(THREAD, result);
704 WB_END
705
706 #endif // INCLUDE_G1GC
707
708 // Alloc memory using the test memory tag so that we can use that to see if
709 // NMT picks it up correctly
710 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
711 jlong addr = 0;
712 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
713 return addr;
714 WB_END
715
716 // Alloc memory with pseudo call stack. The test can create pseudo malloc
717 // allocation site to stress the malloc tracking.
718 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
719 address pc = (address)(size_t)pseudo_stack;
720 NativeCallStack stack(&pc, 1);
721 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
722 WB_END
723
724 // Alloc memory with pseudo call stack and specific memory tag.
725 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint mem_tag))
726 address pc = (address)(size_t)pseudo_stack;
727 NativeCallStack stack(&pc, 1);
728 return (jlong)(uintptr_t)os::malloc(size, (MemTag)mem_tag, stack);
729 WB_END
730
731 // Free the memory allocated by NMTAllocTest
732 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
733 os::free((void*)(uintptr_t)mem);
734 WB_END
735
736 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
737 return (jlong)(uintptr_t)os::reserve_memory(size, mtTest);
738 WB_END
739
740 WB_ENTRY(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
741 return (jlong)(uintptr_t)os::attempt_reserve_memory_at((char*)(uintptr_t)addr, (size_t)size, mtTest);
742 WB_END
743
744 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
745 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
746 WB_END
747
748 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
749 os::uncommit_memory((char *)(uintptr_t)addr, size);
750 WB_END
751
752 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
753 os::release_memory((char *)(uintptr_t)addr, size);
754 WB_END
755
756 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
757 int hash_size = MallocSiteTable::hash_buckets();
758 assert(hash_size > 0, "NMT hash_size should be > 0");
759 return (jint)hash_size;
760 WB_END
761
762 WB_ENTRY(jlong, WB_NMTNewArena(JNIEnv* env, jobject o, jlong init_size))
763 Arena* arena = new (mtTest) Arena(mtTest, Arena::Tag::tag_other, size_t(init_size));
764 return (jlong)arena;
765 WB_END
766
767 WB_ENTRY(void, WB_NMTFreeArena(JNIEnv* env, jobject o, jlong arena))
768 Arena* a = (Arena*)arena;
769 delete a;
770 WB_END
771
772 WB_ENTRY(void, WB_NMTArenaMalloc(JNIEnv* env, jobject o, jlong arena, jlong size))
773 Arena* a = (Arena*)arena;
774 a->Amalloc(size_t(size));
775 WB_END
776
777 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
778 assert(method != nullptr, "method should not be null");
779 ThreadToNativeFromVM ttn(thread);
780 return env->FromReflectedMethod(method);
781 }
782
783 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
784 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
785 private:
786 int _result;
787 const bool _make_not_entrant;
788 public:
789 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
790 _result(0), _make_not_entrant(make_not_entrant) { }
791 int result() const { return _result; }
792
793 void doit() {
794 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
795 if (t->has_last_Java_frame()) {
796 for (StackFrameStream fst(t, false /* update */, true /* process_frames */); !fst.is_done(); fst.next()) {
797 frame* f = fst.current();
798 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
799 Deoptimization::deoptimize(t, *f);
800 if (_make_not_entrant) {
801 nmethod* nm = CodeCache::find_nmethod(f->pc());
802 assert(nm != nullptr, "did not find nmethod");
803 nm->make_not_entrant(nmethod::InvalidationReason::WHITEBOX_DEOPTIMIZATION);
804 }
805 ++_result;
806 }
807 }
808 }
809 }
810 }
811 };
812
813 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
814 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
815 VMThread::execute(&op);
816 return op.result();
817 WB_END
818
819 WB_ENTRY(jboolean, WB_IsFrameDeoptimized(JNIEnv* env, jobject o, jint depth))
820 bool result = false;
821 if (thread->has_last_Java_frame()) {
822 ResourceMark rm(THREAD);
823 RegisterMap reg_map(thread,
824 RegisterMap::UpdateMap::include,
825 RegisterMap::ProcessFrames::include,
826 RegisterMap::WalkContinuation::skip);
827 javaVFrame *jvf = thread->last_java_vframe(®_map);
828 for (jint d = 0; d < depth && jvf != nullptr; d++) {
829 jvf = jvf->java_sender();
830 }
831 result = jvf != nullptr && jvf->fr().is_deoptimized_frame();
832 }
833 return result;
834 WB_END
835
836 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
837 DeoptimizationScope deopt_scope;
838 CodeCache::mark_all_nmethods_for_deoptimization(&deopt_scope);
839 deopt_scope.deoptimize_marked();
840 WB_END
841
842 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
843 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
844 int result = 0;
845 CHECK_JNI_EXCEPTION_(env, result);
846
847 DeoptimizationScope deopt_scope;
848 {
849 MutexLocker mu(Compile_lock);
850 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
851 if (is_osr) {
852 result += mh->method_holder()->mark_osr_nmethods(&deopt_scope, mh());
853 } else {
854 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
855 if (mh->code() != nullptr) {
856 deopt_scope.mark(mh->code());
857 ++result;
858 }
859 }
860 CodeCache::mark_for_deoptimization(&deopt_scope, mh());
861 }
862
863 deopt_scope.deoptimize_marked();
864
865 return result;
866 WB_END
867
868 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
869 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
870 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
871 MutexLocker mu(Compile_lock);
872 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
873 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
874 if (code == nullptr) {
875 return JNI_FALSE;
876 }
877 return !code->is_marked_for_deoptimization();
878 WB_END
879
880 static bool is_excluded_for_compiler(AbstractCompiler* comp, methodHandle& mh) {
881 if (comp == nullptr) {
882 return true;
883 }
884 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
885 bool exclude = directive->ExcludeOption;
886 DirectivesStack::release(directive);
887 return exclude;
888 }
889
890 static bool can_be_compiled_at_level(methodHandle& mh, jboolean is_osr, int level) {
891 if (is_osr) {
892 return CompilationPolicy::can_be_osr_compiled(mh, level);
893 } else {
894 return CompilationPolicy::can_be_compiled(mh, level);
895 }
896 }
897
898 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
899 if (method == nullptr || comp_level > CompilationPolicy::highest_compile_level()) {
900 return false;
901 }
902 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
903 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
904 MutexLocker mu(Compile_lock);
905 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
906
907 // The ExcludeOption directive is evaluated lazily upon compilation attempt. If a method was not tried to be compiled by
908 // a compiler, yet, the method object is not set to be not compilable by that compiler. Thus, evaluate the compiler directive
909 // to exclude a compilation of 'method'.
910 if (comp_level == CompLevel_any) {
911 // Both compilers could have ExcludeOption set. Check all combinations.
912 bool excluded_c1 = is_excluded_for_compiler(CompileBroker::compiler1(), mh);
913 bool excluded_c2 = is_excluded_for_compiler(CompileBroker::compiler2(), mh);
914 if (excluded_c1 && excluded_c2) {
915 // Compilation of 'method' excluded by both compilers.
916 return false;
917 }
918
919 if (excluded_c1) {
920 // C1 only has ExcludeOption set: Check if compilable with C2.
921 return can_be_compiled_at_level(mh, is_osr, CompLevel_full_optimization);
922 } else if (excluded_c2) {
923 // C2 only has ExcludeOption set: Check if compilable with C1.
924 return can_be_compiled_at_level(mh, is_osr, CompLevel_simple);
925 }
926 } else if (comp_level > CompLevel_none && is_excluded_for_compiler(CompileBroker::compiler((int)comp_level), mh)) {
927 // Compilation of 'method' excluded by compiler used for 'comp_level'.
928 return false;
929 }
930
931 return can_be_compiled_at_level(mh, is_osr, (int)comp_level);
932 WB_END
933
934 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
935 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
936 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
937 MutexLocker mu(Compile_lock);
938 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
939 return mh->queued_for_compilation();
940 WB_END
941
942 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
943 if (compLevel < CompLevel_none || compLevel > CompilationPolicy::highest_compile_level()) {
944 return false; // Intrinsic is not available on a non-existent compilation level.
945 }
946 AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
947 if (comp == nullptr) {
948 // Could have compLevel == 0, or !TieredCompilation and incompatible values of TieredStopAtLevel and compLevel.
949 tty->print_cr("WB error: no compiler for requested compilation level %d", compLevel);
950 return false;
951 }
952
953 jmethodID method_id, compilation_context_id;
954 method_id = reflected_method_to_jmid(thread, env, method);
955 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
956 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
957
958 DirectiveSet* directive;
959 if (compilation_context != nullptr) {
960 compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
961 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
962 methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
963 directive = DirectivesStack::getMatchingDirective(cch, comp);
964 } else {
965 // Calling with null matches default directive
966 directive = DirectivesStack::getDefaultDirective(comp);
967 }
968 bool result = comp->is_intrinsic_available(mh, directive);
969 DirectivesStack::release(directive);
970 return result;
971 WB_END
972
973 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
974 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
975 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
976 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
977 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
978 return (code != nullptr ? code->comp_level() : CompLevel_none);
979 WB_END
980
981 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
982 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
983 CHECK_JNI_EXCEPTION(env);
984 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
985 if (is_osr) {
986 mh->set_not_osr_compilable("WhiteBox", comp_level);
987 } else {
988 mh->set_not_compilable("WhiteBox", comp_level);
989 }
990 WB_END
991
992 WB_ENTRY(jint, WB_GetMethodDecompileCount(JNIEnv* env, jobject o, jobject method))
993 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
994 CHECK_JNI_EXCEPTION_(env, 0);
995 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
996 uint cnt = 0;
997 MethodData* mdo = mh->method_data();
998 if (mdo != nullptr) {
999 cnt = mdo->decompile_count();
1000 }
1001 return cnt;
1002 WB_END
1003
1004 // Get the trap count of a method for a specific reason. If the trap count for
1005 // that reason did overflow, this includes the overflow trap count of the method.
1006 // If 'reason' is null, the sum of the traps for all reasons will be returned.
1007 // This number includes the overflow trap count if the trap count for any reason
1008 // did overflow.
1009 WB_ENTRY(jint, WB_GetMethodTrapCount(JNIEnv* env, jobject o, jobject method, jstring reason_obj))
1010 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1011 CHECK_JNI_EXCEPTION_(env, 0);
1012 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1013 uint cnt = 0;
1014 MethodData* mdo = mh->method_data();
1015 if (mdo != nullptr) {
1016 ResourceMark rm(THREAD);
1017 char* reason_str = (reason_obj == nullptr) ?
1018 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1019 bool overflow = false;
1020 for (uint reason = 0; reason < mdo->trap_reason_limit(); reason++) {
1021 if (reason_str != nullptr && !strcmp(reason_str, Deoptimization::trap_reason_name(reason))) {
1022 cnt = mdo->trap_count(reason);
1023 // Count in the overflow trap count on overflow
1024 if (cnt == (uint)-1) {
1025 cnt = mdo->trap_count_limit() + mdo->overflow_trap_count();
1026 }
1027 break;
1028 } else if (reason_str == nullptr) {
1029 uint c = mdo->trap_count(reason);
1030 if (c == (uint)-1) {
1031 c = mdo->trap_count_limit();
1032 if (!overflow) {
1033 // Count overflow trap count just once
1034 overflow = true;
1035 c += mdo->overflow_trap_count();
1036 }
1037 }
1038 cnt += c;
1039 }
1040 }
1041 }
1042 return cnt;
1043 WB_END
1044
1045 WB_ENTRY(jint, WB_GetDeoptCount(JNIEnv* env, jobject o, jstring reason_obj, jstring action_obj))
1046 if (reason_obj == nullptr && action_obj == nullptr) {
1047 return Deoptimization::total_deoptimization_count();
1048 }
1049 ResourceMark rm(THREAD);
1050 const char *reason_str = (reason_obj == nullptr) ?
1051 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1052 const char *action_str = (action_obj == nullptr) ?
1053 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(action_obj));
1054
1055 return Deoptimization::deoptimization_count(reason_str, action_str);
1056 WB_END
1057
1058 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
1059 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1060 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
1061 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1062 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
1063 return (code != nullptr && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
1064 WB_END
1065
1066 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1067 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1068 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1069 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1070 bool result = mh->dont_inline();
1071 mh->set_dont_inline(value == JNI_TRUE);
1072 return result;
1073 WB_END
1074
1075 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
1076 if (comp_level == CompLevel_any) {
1077 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
1078 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
1079 } else {
1080 return CompileBroker::queue_size(comp_level);
1081 }
1082 WB_END
1083
1084 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1085 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1086 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1087 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1088 bool result = mh->force_inline();
1089 mh->set_force_inline(value == JNI_TRUE);
1090 return result;
1091 WB_END
1092
1093 #ifdef LINUX
1094 bool WhiteBox::validate_cgroup(bool cgroups_v2_enabled,
1095 const char* controllers_file,
1096 const char* proc_self_cgroup,
1097 const char* proc_self_mountinfo,
1098 u1* cg_flags) {
1099 CgroupInfo cg_infos[CG_INFO_LENGTH];
1100 return CgroupSubsystemFactory::determine_type(cg_infos, cgroups_v2_enabled, controllers_file,
1101 proc_self_cgroup,
1102 proc_self_mountinfo, cg_flags);
1103 }
1104 #endif
1105
1106 bool WhiteBox::is_asan_enabled() {
1107 #ifdef ADDRESS_SANITIZER
1108 return true;
1109 #else
1110 return false;
1111 #endif
1112 }
1113
1114 bool WhiteBox::is_ubsan_enabled() {
1115 #ifdef UNDEFINED_BEHAVIOR_SANITIZER
1116 return true;
1117 #else
1118 return false;
1119 #endif
1120 }
1121
1122 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, JavaThread* THREAD) {
1123 // Screen for unavailable/bad comp level or null method
1124 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1125 if (method == nullptr) {
1126 tty->print_cr("WB error: request to compile null method");
1127 return false;
1128 }
1129 if (method->is_abstract()) {
1130 tty->print_cr("WB error: request to compile abstract method");
1131 return false;
1132 }
1133 if (comp_level > CompilationPolicy::highest_compile_level()) {
1134 tty->print_cr("WB error: invalid compilation level %d", comp_level);
1135 return false;
1136 }
1137 if (comp == nullptr) {
1138 tty->print_cr("WB error: no compiler for requested compilation level %d", comp_level);
1139 return false;
1140 }
1141
1142 // Check if compilation is blocking
1143 methodHandle mh(THREAD, method);
1144 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
1145 bool is_blocking = !directive->BackgroundCompilationOption;
1146 DirectivesStack::release(directive);
1147
1148 // Compile method and check result
1149 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh->invocation_count(), CompileTask::Reason_Whitebox, CHECK_false);
1150 MutexLocker mu(THREAD, Compile_lock);
1151 bool is_queued = mh->queued_for_compilation();
1152 if ((!is_blocking && is_queued) || nm != nullptr) {
1153 return true;
1154 }
1155 // Check code again because compilation may be finished before Compile_lock is acquired.
1156 if (bci == InvocationEntryBci) {
1157 nmethod* code = mh->code();
1158 if (code != nullptr) {
1159 return true;
1160 }
1161 } else if (mh->lookup_osr_nmethod_for(bci, comp_level, false) != nullptr) {
1162 return true;
1163 }
1164 tty->print("WB error: failed to %s compile at level %d method ", is_blocking ? "blocking" : "", comp_level);
1165 mh->print_short_name(tty);
1166 tty->cr();
1167 if (is_blocking && is_queued) {
1168 tty->print_cr("WB error: blocking compilation is still in queue!");
1169 }
1170 return false;
1171 }
1172
1173 size_t WhiteBox::get_in_use_monitor_count() {
1174 return ObjectSynchronizer::_in_use_list.count();
1175 }
1176
1177 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1178 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1179 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1180 return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1181 WB_END
1182
1183 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1184 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1185 Method* clinit = ik->class_initializer();
1186 if (clinit == nullptr || clinit->method_holder()->is_not_initialized()) {
1187 return false;
1188 }
1189 return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1190 WB_END
1191
1192 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1193 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1194 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1195
1196 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1197 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
1198 bool result = directive->PrintAssemblyOption;
1199 DirectivesStack::release(directive);
1200
1201 return result;
1202 WB_END
1203
1204 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1205 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1206 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1207
1208 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1209
1210 ResourceMark rm(THREAD);
1211 const char* error_msg = nullptr;
1212 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1213 InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1214
1215 if (m == nullptr) {
1216 assert(error_msg != nullptr, "Always have an error message");
1217 tty->print_cr("Got error: %s", error_msg);
1218 return -1; // Pattern failed
1219 }
1220
1221 // Pattern works - now check if it matches
1222 int result;
1223 if (m->match(mh, InlineMatcher::force_inline)) {
1224 result = 2; // Force inline match
1225 } else if (m->match(mh, InlineMatcher::dont_inline)) {
1226 result = 1; // Dont inline match
1227 } else {
1228 result = 0; // No match
1229 }
1230 delete m;
1231 return result;
1232 WB_END
1233
1234 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1235 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1236 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1237
1238 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1239
1240 ResourceMark rm;
1241 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1242
1243 const char* error_msg = nullptr;
1244
1245 BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg, false);
1246 if (m == nullptr) {
1247 assert(error_msg != nullptr, "Must have error_msg");
1248 tty->print_cr("Got error: %s", error_msg);
1249 return -1;
1250 }
1251
1252 // Pattern works - now check if it matches
1253 int result = m->matches(mh);
1254 delete m;
1255 assert(result == 0 || result == 1, "Result out of range");
1256 return result;
1257 WB_END
1258
1259 WB_ENTRY(void, WB_MarkMethodProfiled(JNIEnv* env, jobject o, jobject method))
1260 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1261 CHECK_JNI_EXCEPTION(env);
1262 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1263
1264 MethodData* mdo = mh->method_data();
1265 if (mdo == nullptr) {
1266 Method::build_profiling_method_data(mh, CHECK_AND_CLEAR);
1267 mdo = mh->method_data();
1268 }
1269 mdo->init();
1270 InvocationCounter* icnt = mdo->invocation_counter();
1271 InvocationCounter* bcnt = mdo->backedge_counter();
1272 // set i-counter according to CompilationPolicy::is_method_profiled
1273 icnt->set(Tier4MinInvocationThreshold);
1274 bcnt->set(Tier4CompileThreshold);
1275 WB_END
1276
1277 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1278 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1279 CHECK_JNI_EXCEPTION(env);
1280 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1281 MutexLocker mu(THREAD, Compile_lock);
1282 MethodData* mdo = mh->method_data();
1283 MethodCounters* mcs = mh->method_counters();
1284
1285 if (mdo != nullptr) {
1286 mdo->init();
1287 ResourceMark rm(THREAD);
1288 int arg_count = mdo->method()->size_of_parameters();
1289 for (int i = 0; i < arg_count; i++) {
1290 mdo->set_arg_modified(i, 0);
1291 }
1292 mdo->clean_method_data(/*always_clean*/true);
1293 }
1294
1295 mh->clear_is_not_c1_compilable();
1296 mh->clear_is_not_c2_compilable();
1297 mh->clear_is_not_c2_osr_compilable();
1298 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1299 if (mcs != nullptr) {
1300 mcs->clear_counters();
1301 }
1302 WB_END
1303
1304 template <typename T, int type_enum>
1305 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1306 if (name == nullptr) {
1307 return false;
1308 }
1309 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1310 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1311 CHECK_JNI_EXCEPTION_(env, false);
1312 const JVMFlag* flag = JVMFlag::find_declared_flag(flag_name);
1313 JVMFlag::Error result = JVMFlagAccess::get<T, type_enum>(flag, value);
1314 env->ReleaseStringUTFChars(name, flag_name);
1315 return (result == JVMFlag::SUCCESS);
1316 }
1317
1318 template <typename T, int type_enum>
1319 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1320 if (name == nullptr) {
1321 return false;
1322 }
1323 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1324 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1325 CHECK_JNI_EXCEPTION_(env, false);
1326 JVMFlag* flag = JVMFlag::find_flag(flag_name);
1327 JVMFlag::Error result = JVMFlagAccess::set<T, type_enum>(flag, value, JVMFlagOrigin::INTERNAL);
1328 env->ReleaseStringUTFChars(name, flag_name);
1329 return (result == JVMFlag::SUCCESS);
1330 }
1331
1332 template <typename T>
1333 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1334 ResourceMark rm(thread);
1335 jclass clazz = env->FindClass(name->as_C_string());
1336 CHECK_JNI_EXCEPTION_(env, nullptr);
1337 jmethodID methodID = env->GetStaticMethodID(clazz,
1338 vmSymbols::valueOf_name()->as_C_string(),
1339 sig->as_C_string());
1340 CHECK_JNI_EXCEPTION_(env, nullptr);
1341 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1342 CHECK_JNI_EXCEPTION_(env, nullptr);
1343 return result;
1344 }
1345
1346 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1347 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1348 }
1349 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1350 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1351 }
1352 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1353 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1354 }
1355 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1356 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1357 }*/
1358 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1359 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1360 }
1361
1362 static const JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1363 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1364 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1365 CHECK_JNI_EXCEPTION_(env, nullptr);
1366 const JVMFlag* result = JVMFlag::find_declared_flag(flag_name);
1367 env->ReleaseStringUTFChars(name, flag_name);
1368 return result;
1369 }
1370
1371 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1372 const JVMFlag* flag = getVMFlag(thread, env, name);
1373 return (flag != nullptr) && flag->is_constant_in_binary();
1374 WB_END
1375
1376 WB_ENTRY(jboolean, WB_IsDefaultVMFlag(JNIEnv* env, jobject o, jstring name))
1377 const JVMFlag* flag = getVMFlag(thread, env, name);
1378 return (flag != nullptr) && flag->is_default();
1379 WB_END
1380
1381 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1382 const JVMFlag* flag = getVMFlag(thread, env, name);
1383 return (flag != nullptr) && !(flag->is_unlocked() || flag->is_unlocker());
1384 WB_END
1385
1386 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1387 bool result;
1388 if (GetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result)) {
1389 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1390 return booleanBox(thread, env, result);
1391 }
1392 return nullptr;
1393 WB_END
1394
1395 template <typename T, int type_enum>
1396 jobject GetVMFlag_longBox(JNIEnv* env, JavaThread* thread, jstring name) {
1397 T result;
1398 if (GetVMFlag <T, type_enum> (thread, env, name, &result)) {
1399 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1400 return longBox(thread, env, result);
1401 }
1402 return nullptr;
1403 }
1404
1405 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1406 return GetVMFlag_longBox<JVM_FLAG_TYPE(int)>(env, thread, name);
1407 WB_END
1408
1409 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1410 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint)>(env, thread, name);
1411 WB_END
1412
1413 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1414 return GetVMFlag_longBox<JVM_FLAG_TYPE(intx)>(env, thread, name);
1415 WB_END
1416
1417 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1418 return GetVMFlag_longBox<JVM_FLAG_TYPE(uintx)>(env, thread, name);
1419 WB_END
1420
1421 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1422 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint64_t)>(env, thread, name);
1423 WB_END
1424
1425 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1426 return GetVMFlag_longBox<JVM_FLAG_TYPE(size_t)>(env, thread, name);
1427 WB_END
1428
1429 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1430 double result;
1431 if (GetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result)) {
1432 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1433 return doubleBox(thread, env, result);
1434 }
1435 return nullptr;
1436 WB_END
1437
1438 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1439 ccstr ccstrResult;
1440 if (GetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &ccstrResult)) {
1441 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1442 jstring result = env->NewStringUTF(ccstrResult);
1443 CHECK_JNI_EXCEPTION_(env, nullptr);
1444 return result;
1445 }
1446 return nullptr;
1447 WB_END
1448
1449 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1450 bool result = value == JNI_TRUE ? true : false;
1451 SetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result);
1452 WB_END
1453
1454 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1455 int result = checked_cast<int>(value);
1456 SetVMFlag <JVM_FLAG_TYPE(int)> (thread, env, name, &result);
1457 WB_END
1458
1459 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1460 uint result = checked_cast<uint>(value);
1461 SetVMFlag <JVM_FLAG_TYPE(uint)> (thread, env, name, &result);
1462 WB_END
1463
1464 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1465 intx result = value;
1466 SetVMFlag <JVM_FLAG_TYPE(intx)> (thread, env, name, &result);
1467 WB_END
1468
1469 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1470 uintx result = value;
1471 SetVMFlag <JVM_FLAG_TYPE(uintx)> (thread, env, name, &result);
1472 WB_END
1473
1474 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1475 uint64_t result = value;
1476 SetVMFlag <JVM_FLAG_TYPE(uint64_t)> (thread, env, name, &result);
1477 WB_END
1478
1479 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1480 size_t result = value;
1481 SetVMFlag <JVM_FLAG_TYPE(size_t)> (thread, env, name, &result);
1482 WB_END
1483
1484 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1485 double result = value;
1486 SetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result);
1487 WB_END
1488
1489 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1490 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1491 const char* ccstrValue;
1492 if (value == nullptr) {
1493 ccstrValue = nullptr;
1494 }
1495 else {
1496 ccstrValue = env->GetStringUTFChars(value, nullptr);
1497 CHECK_JNI_EXCEPTION(env);
1498 }
1499 {
1500 ccstr param = ccstrValue;
1501 ThreadInVMfromNative ttvfn(thread); // back to VM
1502 if (SetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, ¶m)) {
1503 assert(param == nullptr, "old value is freed automatically and not returned");
1504 }
1505 }
1506 if (value != nullptr) {
1507 env->ReleaseStringUTFChars(value, ccstrValue);
1508 }
1509 WB_END
1510
1511 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1512 WhiteBox::compilation_locked = true;
1513 WB_END
1514
1515 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1516 MonitorLocker mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1517 WhiteBox::compilation_locked = false;
1518 mo.notify_all();
1519 WB_END
1520
1521 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1522 ResourceMark rm(THREAD);
1523 int len;
1524 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1525 return (StringTable::lookup(name, len) != nullptr);
1526 WB_END
1527
1528 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1529 Universe::heap()->collect(GCCause::_wb_full_gc);
1530 WB_END
1531
1532 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1533 Universe::heap()->collect(GCCause::_wb_young_gc);
1534 WB_END
1535
1536 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1537 // static+volatile in order to force the read to happen
1538 // (not be eliminated by the compiler)
1539 static char c;
1540 static volatile char* p;
1541
1542 p = os::reserve_memory(os::vm_allocation_granularity(), mtTest);
1543 if (p == nullptr) {
1544 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1545 }
1546
1547 c = *p;
1548 WB_END
1549
1550 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1551 const char* features = VM_Version::cpu_info_string();
1552 ThreadToNativeFromVM ttn(thread);
1553 jstring features_string = env->NewStringUTF(features);
1554
1555 CHECK_JNI_EXCEPTION_(env, nullptr);
1556
1557 return features_string;
1558 WB_END
1559
1560 CodeBlobType WhiteBox::get_blob_type(const CodeBlob* code) {
1561 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1562 return CodeCache::get_code_heap(code)->code_blob_type();
1563 }
1564
1565 CodeHeap* WhiteBox::get_code_heap(CodeBlobType blob_type) {
1566 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1567 return CodeCache::get_code_heap(blob_type);
1568 }
1569
1570 struct CodeBlobStub {
1571 CodeBlobStub(const CodeBlob* blob) :
1572 name(os::strdup(blob->name())),
1573 size(blob->size()),
1574 blob_type(static_cast<jint>(WhiteBox::get_blob_type(blob))),
1575 address((jlong) blob),
1576 code_begin((jlong) blob->code_begin()),
1577 is_nmethod((jboolean) blob->is_nmethod()) { }
1578 ~CodeBlobStub() { os::free((void*) name); }
1579 const char* const name;
1580 const jint size;
1581 const jint blob_type;
1582 const jlong address;
1583 const jlong code_begin;
1584 const jboolean is_nmethod;
1585 };
1586
1587 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1588 ResourceMark rm;
1589 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1590 CHECK_JNI_EXCEPTION_(env, nullptr);
1591 jobjectArray result = env->NewObjectArray(6, clazz, nullptr);
1592
1593 jstring name = env->NewStringUTF(cb->name);
1594 CHECK_JNI_EXCEPTION_(env, nullptr);
1595 env->SetObjectArrayElement(result, 0, name);
1596
1597 jobject obj = integerBox(thread, env, cb->size);
1598 CHECK_JNI_EXCEPTION_(env, nullptr);
1599 env->SetObjectArrayElement(result, 1, obj);
1600
1601 obj = integerBox(thread, env, cb->blob_type);
1602 CHECK_JNI_EXCEPTION_(env, nullptr);
1603 env->SetObjectArrayElement(result, 2, obj);
1604
1605 obj = longBox(thread, env, cb->address);
1606 CHECK_JNI_EXCEPTION_(env, nullptr);
1607 env->SetObjectArrayElement(result, 3, obj);
1608
1609 obj = longBox(thread, env, cb->code_begin);
1610 CHECK_JNI_EXCEPTION_(env, nullptr);
1611 env->SetObjectArrayElement(result, 4, obj);
1612
1613 obj = booleanBox(thread, env, cb->is_nmethod);
1614 CHECK_JNI_EXCEPTION_(env, nullptr);
1615 env->SetObjectArrayElement(result, 5, obj);
1616
1617 return result;
1618 }
1619
1620 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1621 ResourceMark rm(THREAD);
1622 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1623 CHECK_JNI_EXCEPTION_(env, nullptr);
1624 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1625 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1626 jobjectArray result = nullptr;
1627 if (code == nullptr) {
1628 return result;
1629 }
1630 int comp_level = code->comp_level();
1631 int insts_size = code->insts_size();
1632
1633 ThreadToNativeFromVM ttn(thread);
1634 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1635 CHECK_JNI_EXCEPTION_(env, nullptr);
1636 result = env->NewObjectArray(5, clazz, nullptr);
1637 if (result == nullptr) {
1638 return result;
1639 }
1640
1641 CodeBlobStub stub(code);
1642 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1643 CHECK_JNI_EXCEPTION_(env, nullptr);
1644 env->SetObjectArrayElement(result, 0, codeBlob);
1645
1646 jobject level = integerBox(thread, env, comp_level);
1647 CHECK_JNI_EXCEPTION_(env, nullptr);
1648 env->SetObjectArrayElement(result, 1, level);
1649
1650 jbyteArray insts = env->NewByteArray(insts_size);
1651 CHECK_JNI_EXCEPTION_(env, nullptr);
1652 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1653 env->SetObjectArrayElement(result, 2, insts);
1654
1655 jobject id = integerBox(thread, env, code->compile_id());
1656 CHECK_JNI_EXCEPTION_(env, nullptr);
1657 env->SetObjectArrayElement(result, 3, id);
1658
1659 jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1660 CHECK_JNI_EXCEPTION_(env, nullptr);
1661 env->SetObjectArrayElement(result, 4, entry_point);
1662
1663 return result;
1664 WB_END
1665
1666 WB_ENTRY(void, WB_RelocateNMethodFromMethod(JNIEnv* env, jobject o, jobject method, jint blob_type))
1667 ResourceMark rm(THREAD);
1668 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1669 CHECK_JNI_EXCEPTION(env);
1670 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1671 nmethod* code = mh->code();
1672 if (code != nullptr) {
1673 MutexLocker ml_Compile_lock(Compile_lock);
1674 CompiledICLocker ic_locker(code);
1675 MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1676 code->relocate(static_cast<CodeBlobType>(blob_type));
1677 }
1678 WB_END
1679
1680 WB_ENTRY(void, WB_RelocateNMethodFromAddr(JNIEnv* env, jobject o, jlong addr, jint blob_type))
1681 ResourceMark rm(THREAD);
1682 CHECK_JNI_EXCEPTION(env);
1683 void* address = (void*) addr;
1684
1685 if (address == nullptr) {
1686 return;
1687 }
1688
1689 MutexLocker ml_Compile_lock(Compile_lock);
1690 MutexLocker ml_CompiledIC_lock(CompiledIC_lock, Mutex::_no_safepoint_check_flag);
1691 MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1692
1693 // Verify that nmethod address is still valid
1694 CodeBlob* blob = CodeCache::find_blob(address);
1695 if (blob != nullptr && blob->is_nmethod()) {
1696 nmethod* code = blob->as_nmethod();
1697 if (code->is_in_use() && !code->is_unloading()) {
1698 CompiledICLocker ic_locker(code);
1699 code->relocate(static_cast<CodeBlobType>(blob_type));
1700 }
1701 }
1702 WB_END
1703
1704 CodeBlob* WhiteBox::allocate_code_blob(int size, CodeBlobType blob_type) {
1705 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1706 BufferBlob* blob;
1707 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1708 if (full_size < size) {
1709 full_size += align_up(size - full_size, oopSize);
1710 }
1711 {
1712 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1713 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1714 if (blob != nullptr) {
1715 ::new (blob) BufferBlob("WB::DummyBlob", CodeBlobKind::Buffer, full_size);
1716 }
1717 }
1718 // Track memory usage statistic after releasing CodeCache_lock
1719 MemoryService::track_code_cache_memory_usage();
1720 return blob;
1721 }
1722
1723 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1724 if (size < 0) {
1725 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1726 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1727 }
1728 return (jlong) WhiteBox::allocate_code_blob(size, static_cast<CodeBlobType>(blob_type));
1729 WB_END
1730
1731 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1732 if (addr == 0) {
1733 return;
1734 }
1735 BufferBlob::free((BufferBlob*) addr);
1736 WB_END
1737
1738 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1739 ResourceMark rm;
1740 GrowableArray<CodeBlobStub*> blobs;
1741 {
1742 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1743 CodeHeap* heap = WhiteBox::get_code_heap(static_cast<CodeBlobType>(blob_type));
1744 if (heap == nullptr) {
1745 return nullptr;
1746 }
1747 for (CodeBlob* cb = (CodeBlob*) heap->first();
1748 cb != nullptr; cb = (CodeBlob*) heap->next(cb)) {
1749 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1750 new (stub) CodeBlobStub(cb);
1751 blobs.append(stub);
1752 }
1753 }
1754 ThreadToNativeFromVM ttn(thread);
1755 jobjectArray result = nullptr;
1756 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1757 CHECK_JNI_EXCEPTION_(env, nullptr);
1758 result = env->NewObjectArray(blobs.length(), clazz, nullptr);
1759 CHECK_JNI_EXCEPTION_(env, nullptr);
1760 if (result == nullptr) {
1761 return result;
1762 }
1763 int i = 0;
1764 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1765 it != blobs.end(); ++it) {
1766 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1767 CHECK_JNI_EXCEPTION_(env, nullptr);
1768 env->SetObjectArrayElement(result, i, obj);
1769 CHECK_JNI_EXCEPTION_(env, nullptr);
1770 ++i;
1771 }
1772 return result;
1773 WB_END
1774
1775 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1776 return CompileBroker::get_compilation_activity_mode();
1777 WB_END
1778
1779 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1780 if (addr == 0) {
1781 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1782 "WB_GetCodeBlob: addr is null");
1783 }
1784 ThreadToNativeFromVM ttn(thread);
1785 CodeBlobStub stub((CodeBlob*) addr);
1786 return codeBlob2objectArray(thread, env, &stub);
1787 WB_END
1788
1789 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1790 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1791 CHECK_JNI_EXCEPTION_(env, 0);
1792 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1793 return (jlong) mh->method_data();
1794 WB_END
1795
1796 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1797 return (jlong) thread->stack_size();
1798 WB_END
1799
1800 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1801 return (jlong) thread->stack_overflow_state()->stack_available(
1802 os::current_stack_pointer()) - (jlong)StackOverflow::stack_shadow_zone_size();
1803 WB_END
1804
1805
1806 int WhiteBox::array_bytes_to_length(size_t bytes) {
1807 return Array<u1>::bytes_to_length(bytes);
1808 }
1809
1810 ///////////////
1811 // MetaspaceTestContext and MetaspaceTestArena
1812 WB_ENTRY(jlong, WB_CreateMetaspaceTestContext(JNIEnv* env, jobject wb, jlong commit_limit, jlong reserve_limit))
1813 assert(is_aligned(commit_limit, BytesPerWord),
1814 "WB_CreateMetaspaceTestContext: commit_limit is not a multiple of the system word byte size");
1815 assert(is_aligned(reserve_limit, BytesPerWord),
1816 "WB_CreateMetaspaceTestContext: reserve_limit is not a multiple of the system word byte size");
1817 metaspace::MetaspaceTestContext* context =
1818 new metaspace::MetaspaceTestContext("whitebox-metaspace-context", (size_t) commit_limit / BytesPerWord,
1819 (size_t) reserve_limit / BytesPerWord);
1820 return (jlong)p2i(context);
1821 WB_END
1822
1823 WB_ENTRY(void, WB_DestroyMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1824 delete (metaspace::MetaspaceTestContext*) context;
1825 WB_END
1826
1827 WB_ENTRY(void, WB_PurgeMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1828 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1829 context0->purge_area();
1830 WB_END
1831
1832 WB_ENTRY(void, WB_PrintMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1833 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1834 context0->print_on(tty);
1835 WB_END
1836
1837 WB_ENTRY(jlong, WB_GetTotalCommittedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1838 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1839 return (jlong)context0->committed_words() * BytesPerWord;
1840 WB_END
1841
1842 WB_ENTRY(jlong, WB_GetTotalUsedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1843 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1844 return (jlong)context0->used_words() * BytesPerWord;
1845 WB_END
1846
1847 WB_ENTRY(jlong, WB_CreateArenaInTestContext(JNIEnv* env, jobject wb, jlong context, jboolean is_micro))
1848 const Metaspace::MetaspaceType type = is_micro ? Metaspace::ClassMirrorHolderMetaspaceType : Metaspace::StandardMetaspaceType;
1849 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1850 return (jlong)p2i(context0->create_arena(type));
1851 WB_END
1852
1853 WB_ENTRY(void, WB_DestroyMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena))
1854 delete (metaspace::MetaspaceTestArena*) arena;
1855 WB_END
1856
1857 WB_ENTRY(jlong, WB_AllocateFromMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong size))
1858 assert(is_aligned(size, BytesPerWord),
1859 "WB_AllocateFromMetaspaceTestArena: size is not a multiple of the system word byte size");
1860 metaspace::MetaspaceTestArena *arena0 = (metaspace::MetaspaceTestArena *)arena;
1861 MetaWord *p = arena0->allocate((size_t) size / BytesPerWord);
1862 return (jlong)p2i(p);
1863 WB_END
1864
1865 WB_ENTRY(void, WB_DeallocateToMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong p, jlong size))
1866 assert(is_aligned(size, BytesPerWord),
1867 "WB_DeallocateToMetaspaceTestArena: size is not a multiple of the system word byte size");
1868 metaspace::MetaspaceTestArena* arena0 = (metaspace::MetaspaceTestArena*) arena;
1869 arena0->deallocate((MetaWord*)p, (size_t) size / BytesPerWord);
1870 WB_END
1871
1872 WB_ENTRY(jlong, WB_GetMaxMetaspaceAllocationSize(JNIEnv* env, jobject wb))
1873 return (jlong) Metaspace::max_allocation_word_size() * BytesPerWord;
1874 WB_END
1875
1876 WB_ENTRY(jlong, WB_WordSize(JNIEnv* env))
1877 return (jlong)BytesPerWord;
1878 WB_END
1879
1880 WB_ENTRY(jlong, WB_RootChunkWordSize(JNIEnv* env))
1881 return (jlong)Metaspace::reserve_alignment_words();
1882 WB_END
1883
1884 WB_ENTRY(jboolean, WB_IsStaticallyLinked(JNIEnv* env, jobject wb))
1885 return JVM_IsStaticallyLinked();
1886 WB_END
1887
1888 //////////////
1889
1890 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1891 if (size < 0) {
1892 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1893 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1894 }
1895
1896 oop class_loader_oop = JNIHandles::resolve(class_loader);
1897 ClassLoaderData* cld = class_loader_oop != nullptr
1898 ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1899 : ClassLoaderData::the_null_class_loader_data();
1900
1901 void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1902
1903 return (jlong)(uintptr_t)metadata;
1904 WB_END
1905
1906 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1907 jstring version, jstring location, jobjectArray packages))
1908 Handle h_module (THREAD, JNIHandles::resolve(module));
1909 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1910 WB_END
1911
1912 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1913 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1914 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1915 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1916 WB_END
1917
1918 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1919 Handle h_module (THREAD, JNIHandles::resolve(module));
1920 Modules::add_module_exports_to_all_unnamed(h_module, package, CHECK);
1921 WB_END
1922
1923 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1924 Handle h_module (THREAD, JNIHandles::resolve(module));
1925 Modules::add_module_exports(h_module, package, Handle(), CHECK);
1926 WB_END
1927
1928 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1929 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1930 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1931 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1932 WB_END
1933
1934 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1935 if (inc < 0) {
1936 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1937 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1938 }
1939
1940 jlong max_size_t = (jlong) ((size_t) -1);
1941 if (inc > max_size_t) {
1942 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1943 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1944 }
1945
1946 size_t new_cap_until_GC = 0;
1947 size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1948 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1949 if (!success) {
1950 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1951 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1952 "due to contention with another thread");
1953 }
1954 return (jlong) new_cap_until_GC;
1955 WB_END
1956
1957 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1958 return (jlong) MetaspaceGC::capacity_until_GC();
1959 WB_END
1960
1961 // The function is only valid when CDS is available.
1962 WB_ENTRY(jlong, WB_AOTMetaspaceRegionAlignment(JNIEnv* env, jobject wb))
1963 #if INCLUDE_CDS
1964 return (jlong)AOTMetaspace::core_region_alignment();
1965 #else
1966 ShouldNotReachHere();
1967 return 0L;
1968 #endif
1969 WB_END
1970
1971 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1972 oop obj_oop = JNIHandles::resolve(obj);
1973 return (jboolean) obj_oop->mark().has_monitor();
1974 WB_END
1975
1976 WB_ENTRY(jboolean, WB_IsAsanEnabled(JNIEnv* env))
1977 return (jboolean) WhiteBox::is_asan_enabled();
1978 WB_END
1979
1980 WB_ENTRY(jboolean, WB_IsUbsanEnabled(JNIEnv* env))
1981 return (jboolean) WhiteBox::is_ubsan_enabled();
1982 WB_END
1983
1984 WB_ENTRY(jlong, WB_getInUseMonitorCount(JNIEnv* env, jobject wb))
1985 return (jlong) WhiteBox::get_in_use_monitor_count();
1986 WB_END
1987
1988 WB_ENTRY(jint, WB_getLockStackCapacity(JNIEnv* env))
1989 return (jint) LockStack::CAPACITY;
1990 WB_END
1991
1992 WB_ENTRY(jboolean, WB_supportsRecursiveFastLocking(JNIEnv* env))
1993 return (jboolean) VM_Version::supports_recursive_fast_locking();
1994 WB_END
1995
1996 WB_ENTRY(jboolean, WB_DeflateIdleMonitors(JNIEnv* env, jobject wb))
1997 log_info(monitorinflation)("WhiteBox initiated DeflateIdleMonitors");
1998 return ObjectSynchronizer::request_deflate_idle_monitors_from_wb();
1999 WB_END
2000
2001 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
2002 VM_ForceSafepoint force_safepoint_op;
2003 VMThread::execute(&force_safepoint_op);
2004 WB_END
2005
2006 WB_ENTRY(void, WB_ForceClassLoaderStatsSafepoint(JNIEnv* env, jobject wb))
2007 nullStream dev_null;
2008 ClassLoaderStatsVMOperation force_op(&dev_null);
2009 VMThread::execute(&force_op);
2010 WB_END
2011
2012 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
2013 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2014 return (jlong) ik->constants();
2015 WB_END
2016
2017 WB_ENTRY(jobjectArray, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass klass))
2018 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2019 objArrayOop resolved_refs= ik->constants()->resolved_references();
2020 return (jobjectArray)JNIHandles::make_local(THREAD, resolved_refs);
2021 WB_END
2022
2023 WB_ENTRY(jobjectArray, WB_getObjectsViaKlassOopMaps(JNIEnv* env, jobject wb, jobject thing))
2024 oop aoop = JNIHandles::resolve(thing);
2025 if (!aoop->is_instance()) {
2026 return nullptr;
2027 }
2028 instanceHandle ih(THREAD, (instanceOop) aoop);
2029 InstanceKlass* klass = InstanceKlass::cast(ih->klass());
2030 if (klass->nonstatic_oop_map_count() == 0) {
2031 return nullptr;
2032 }
2033 const OopMapBlock* map = klass->start_of_nonstatic_oop_maps();
2034 const OopMapBlock* const end = map + klass->nonstatic_oop_map_count();
2035 int oop_count = 0;
2036 while (map < end) {
2037 oop_count += map->count();
2038 map++;
2039 }
2040
2041 objArrayHandle result_array =
2042 oopFactory::new_objArray_handle(vmClasses::Object_klass(), oop_count, CHECK_NULL);
2043 map = klass->start_of_nonstatic_oop_maps();
2044 int index = 0;
2045 while (map < end) {
2046 int offset = map->offset();
2047 for (unsigned int j = 0; j < map->count(); j++) {
2048 result_array->obj_at_put(index++, ih->obj_field(offset));
2049 offset += heapOopSize;
2050 }
2051 map++;
2052 }
2053 return (jobjectArray)JNIHandles::make_local(THREAD, result_array());
2054 WB_END
2055
2056 // Collect Object oops but not value objects...loaded from heap
2057 class CollectObjectOops : public BasicOopIterateClosure {
2058 public:
2059 GrowableArray<Handle>* _array;
2060
2061 CollectObjectOops() {
2062 _array = new GrowableArray<Handle>(128);
2063 }
2064
2065 void add_oop(oop o) {
2066 Handle oh = Handle(Thread::current(), o);
2067 if (oh != nullptr && oh->is_inline_type()) {
2068 oh->oop_iterate(this);
2069 } else {
2070 _array->append(oh);
2071 }
2072 }
2073
2074 template <class T> inline void add_oop(T* p) { add_oop(HeapAccess<>::oop_load(p)); }
2075 void do_oop(oop* o) { add_oop(o); }
2076 void do_oop(narrowOop* v) { add_oop(v); }
2077
2078 jobjectArray create_jni_result(JNIEnv* env, TRAPS) {
2079 objArrayHandle result_array =
2080 oopFactory::new_objArray_handle(vmClasses::Object_klass(), _array->length(), CHECK_NULL);
2081 for (int i = 0 ; i < _array->length(); i++) {
2082 result_array->obj_at_put(i, _array->at(i)());
2083 }
2084 return (jobjectArray)JNIHandles::make_local(THREAD, result_array());
2085 }
2086 };
2087
2088 // Collect Object oops but not value objects...loaded from frames
2089 class CollectFrameObjectOops : public BasicOopIterateClosure {
2090 public:
2091 CollectObjectOops _collect;
2092
2093 template <class T> inline void add_oop(T* p) { _collect.add_oop(RawAccess<>::oop_load(p)); }
2094 void do_oop(oop* o) { add_oop(o); }
2095 void do_oop(narrowOop* v) { add_oop(v); }
2096
2097 jobjectArray create_jni_result(JNIEnv* env, TRAPS) {
2098 return _collect.create_jni_result(env, THREAD);
2099 }
2100 };
2101
2102 // Collect Object oops for the given oop, iterate through value objects
2103 WB_ENTRY(jobjectArray, WB_getObjectsViaOopIterator(JNIEnv* env, jobject wb, jobject thing))
2104 ResourceMark rm(thread);
2105 Handle objh(thread, JNIHandles::resolve(thing));
2106 CollectObjectOops collectOops;
2107 objh->oop_iterate(&collectOops);
2108 return collectOops.create_jni_result(env, THREAD);
2109 WB_END
2110
2111 // Collect Object oops for the given frame deep, iterate through value objects
2112 WB_ENTRY(jobjectArray, WB_getObjectsViaFrameOopIterator(JNIEnv* env, jobject wb, jint depth))
2113 KeepStackGCProcessedMark ksgcpm(THREAD);
2114 ResourceMark rm(THREAD);
2115 CollectFrameObjectOops collectOops;
2116 StackFrameStream sfs(thread, true /* update */, true /* process_frames */);
2117 while (depth > 0) { // Skip the native WB API frame
2118 sfs.next();
2119 frame* f = sfs.current();
2120 f->oops_do(&collectOops, nullptr, sfs.register_map());
2121 depth--;
2122 }
2123 return collectOops.create_jni_result(env, THREAD);
2124 WB_END
2125
2126 WB_ENTRY(jint, WB_getFieldEntriesLength(JNIEnv* env, jobject wb, jclass klass))
2127 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2128 ConstantPool* cp = ik->constants();
2129 if (cp->cache() == nullptr) {
2130 return -1;
2131 }
2132 return cp->resolved_field_entries_length();
2133 WB_END
2134
2135 WB_ENTRY(jint, WB_getFieldCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2136 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2137 ConstantPool* cp = ik->constants();
2138 if (cp->cache() == nullptr) {
2139 return -1;
2140 }
2141 return cp->resolved_field_entry_at(index)->constant_pool_index();
2142 WB_END
2143
2144 WB_ENTRY(jint, WB_getMethodEntriesLength(JNIEnv* env, jobject wb, jclass klass))
2145 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2146 ConstantPool* cp = ik->constants();
2147 if (cp->cache() == nullptr) {
2148 return -1;
2149 }
2150 return cp->resolved_method_entries_length();
2151 WB_END
2152
2153 WB_ENTRY(jint, WB_getMethodCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2154 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2155 ConstantPool* cp = ik->constants();
2156 if (cp->cache() == nullptr) {
2157 return -1;
2158 }
2159 return cp->resolved_method_entry_at(index)->constant_pool_index();
2160 WB_END
2161
2162 WB_ENTRY(jint, WB_getIndyInfoLength(JNIEnv* env, jobject wb, jclass klass))
2163 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2164 ConstantPool* cp = ik->constants();
2165 if (cp->cache() == nullptr) {
2166 return -1;
2167 }
2168 return cp->resolved_indy_entries_length();
2169 WB_END
2170
2171 WB_ENTRY(jint, WB_getIndyCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2172 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2173 ConstantPool* cp = ik->constants();
2174 if (cp->cache() == nullptr) {
2175 return -1;
2176 }
2177 return cp->resolved_indy_entry_at(index)->constant_pool_index();
2178 WB_END
2179
2180 WB_ENTRY(jobject, WB_printClasses(JNIEnv* env, jobject wb, jstring class_name_pattern, jint flags))
2181 ThreadToNativeFromVM ttnfv(thread);
2182 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2183 ResourceMark rm;
2184 stringStream st;
2185 {
2186 ThreadInVMfromNative ttvfn(thread); // back to VM
2187 ClassPrinter::print_classes(c, flags, &st);
2188 }
2189 jstring result = env->NewStringUTF(st.freeze());
2190 CHECK_JNI_EXCEPTION_(env, nullptr);
2191 return result;
2192 WB_END
2193
2194 WB_ENTRY(jobject, WB_printMethods(JNIEnv* env, jobject wb, jstring class_name_pattern, jstring method_pattern, jint flags))
2195 ThreadToNativeFromVM ttnfv(thread);
2196 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2197 const char* m = env->GetStringUTFChars(method_pattern, nullptr);
2198 ResourceMark rm;
2199 stringStream st;
2200 {
2201 ThreadInVMfromNative ttvfn(thread); // back to VM
2202 ClassPrinter::print_methods(c, m, flags, &st);
2203 }
2204 jstring result = env->NewStringUTF(st.freeze());
2205 CHECK_JNI_EXCEPTION_(env, nullptr);
2206 return result;
2207 WB_END
2208
2209 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
2210 VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
2211 VMThread::execute(&clear_ics);
2212 WB_END
2213
2214 template <typename T>
2215 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
2216 assert(value != nullptr, "sanity");
2217 if (method == nullptr || name == nullptr) {
2218 return false;
2219 }
2220 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
2221 CHECK_JNI_EXCEPTION_(env, false);
2222 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
2223 // can't be in VM when we call JNI
2224 ThreadToNativeFromVM ttnfv(thread);
2225 const char* flag_name = env->GetStringUTFChars(name, nullptr);
2226 CHECK_JNI_EXCEPTION_(env, false);
2227 CompileCommandEnum option = CompilerOracle::string_to_option(flag_name);
2228 env->ReleaseStringUTFChars(name, flag_name);
2229 if (option == CompileCommandEnum::Unknown) {
2230 return false;
2231 }
2232 if (!CompilerOracle::option_matches_type(option, *value)) {
2233 return false;
2234 }
2235 return CompilerOracle::has_option_value(mh, option, *value);
2236 }
2237
2238 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2239 bool result;
2240 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
2241 // can't be in VM when we call JNI
2242 ThreadToNativeFromVM ttnfv(thread);
2243 return booleanBox(thread, env, result);
2244 }
2245 return nullptr;
2246 WB_END
2247
2248 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2249 intx result;
2250 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
2251 // can't be in VM when we call JNI
2252 ThreadToNativeFromVM ttnfv(thread);
2253 return longBox(thread, env, result);
2254 }
2255 return nullptr;
2256 WB_END
2257
2258 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2259 uintx result;
2260 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
2261 // can't be in VM when we call JNI
2262 ThreadToNativeFromVM ttnfv(thread);
2263 return longBox(thread, env, result);
2264 }
2265 return nullptr;
2266 WB_END
2267
2268 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2269 double result;
2270 if (GetMethodOption <double> (thread, env, method, name, &result)) {
2271 // can't be in VM when we call JNI
2272 ThreadToNativeFromVM ttnfv(thread);
2273 return doubleBox(thread, env, result);
2274 }
2275 return nullptr;
2276 WB_END
2277
2278 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2279 ccstr ccstrResult;
2280 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
2281 // can't be in VM when we call JNI
2282 ThreadToNativeFromVM ttnfv(thread);
2283 jstring result = env->NewStringUTF(ccstrResult);
2284 CHECK_JNI_EXCEPTION_(env, nullptr);
2285 return result;
2286 }
2287 return nullptr;
2288 WB_END
2289
2290 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
2291 const char* p = CDSConfig::default_archive_path();
2292 ThreadToNativeFromVM ttn(thread);
2293 jstring path_string = env->NewStringUTF(p);
2294
2295 CHECK_JNI_EXCEPTION_(env, nullptr);
2296
2297 return path_string;
2298 WB_END
2299
2300 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
2301 return CDSConfig::is_using_archive();
2302 WB_END
2303
2304 WB_ENTRY(jint, WB_GetCDSGenericHeaderMinVersion(JNIEnv* env, jobject wb))
2305 #if INCLUDE_CDS
2306 return (jint)CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION;
2307 #else
2308 ShouldNotReachHere();
2309 return (jint)-1;
2310 #endif
2311 WB_END
2312
2313 WB_ENTRY(jint, WB_GetCDSCurrentVersion(JNIEnv* env, jobject wb))
2314 #if INCLUDE_CDS
2315 return (jint)CURRENT_CDS_ARCHIVE_VERSION;
2316 #else
2317 ShouldNotReachHere();
2318 return (jint)-1;
2319 #endif
2320 WB_END
2321
2322 WB_ENTRY(jboolean, WB_CDSMemoryMappingFailed(JNIEnv* env, jobject wb))
2323 return FileMapInfo::memory_mapping_failed();
2324 WB_END
2325
2326 WB_ENTRY(jboolean, WB_IsSharedInternedString(JNIEnv* env, jobject wb, jobject str))
2327 if (!HeapShared::is_loading_mapping_mode()) {
2328 return false;
2329 }
2330 ResourceMark rm(THREAD);
2331 oop str_oop = JNIHandles::resolve(str);
2332 int length;
2333 jchar* chars = java_lang_String::as_unicode_string(str_oop, length, CHECK_(false));
2334 return StringTable::lookup_shared(chars, length) == str_oop;
2335 WB_END
2336
2337 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
2338 return (jboolean)AOTMetaspace::in_aot_cache(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2339 WB_END
2340
2341 WB_ENTRY(jboolean, WB_AreSharedStringsMapped(JNIEnv* env))
2342 return AOTMappedHeapLoader::is_mapped();
2343 WB_END
2344
2345 WB_ENTRY(void, WB_LinkClass(JNIEnv* env, jobject wb, jclass clazz))
2346 Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2347 if (!k->is_instance_klass()) {
2348 return;
2349 }
2350 InstanceKlass *ik = InstanceKlass::cast(k);
2351 ik->link_class(THREAD); // may throw verification error
2352 WB_END
2353
2354 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
2355 return AOTMappedHeapLoader::is_mapped();
2356 WB_END
2357
2358 WB_ENTRY(jboolean, WB_IsCDSIncluded(JNIEnv* env))
2359 #if INCLUDE_CDS
2360 // An exploded build inhibits use of CDS. Therefore, for the
2361 // purpose of testing, the JVM can be treated as not having CDS
2362 // built in at all.
2363 return ClassLoader::has_jrt_entry();
2364 #else
2365 return false;
2366 #endif // INCLUDE_CDS
2367 WB_END
2368
2369 WB_ENTRY(jboolean, WB_isC2OrJVMCIIncluded(JNIEnv* env))
2370 #if COMPILER2_OR_JVMCI
2371 return true;
2372 #else
2373 return false;
2374 #endif
2375 WB_END
2376
2377 WB_ENTRY(jboolean, WB_IsJVMCISupportedByGC(JNIEnv* env))
2378 #if INCLUDE_JVMCI
2379 return JVMCIGlobals::gc_supports_jvmci();
2380 #else
2381 return false;
2382 #endif
2383 WB_END
2384
2385 static bool canWriteJavaHeapArchive() {
2386 return !CDSConfig::are_vm_options_incompatible_with_dumping_heap();
2387 }
2388
2389 WB_ENTRY(jboolean, WB_CanWriteJavaHeapArchive(JNIEnv* env))
2390 return canWriteJavaHeapArchive();
2391 WB_END
2392
2393 WB_ENTRY(jboolean, WB_CanWriteMappedJavaHeapArchive(JNIEnv* env))
2394 return canWriteJavaHeapArchive() && !AOTStreamableObjects;
2395 WB_END
2396
2397 WB_ENTRY(jboolean, WB_CanWriteStreamedJavaHeapArchive(JNIEnv* env))
2398 return canWriteJavaHeapArchive() && AOTStreamableObjects;
2399 WB_END
2400
2401 WB_ENTRY(jboolean, WB_IsJFRIncluded(JNIEnv* env))
2402 #if INCLUDE_JFR
2403 return true;
2404 #else
2405 return false;
2406 #endif // INCLUDE_JFR
2407 WB_END
2408
2409 WB_ENTRY(jboolean, WB_IsDTraceIncluded(JNIEnv* env))
2410 #if defined(DTRACE_ENABLED)
2411 return true;
2412 #else
2413 return false;
2414 #endif // DTRACE_ENABLED
2415 WB_END
2416
2417 #if INCLUDE_CDS
2418
2419 WB_ENTRY(jint, WB_GetCDSOffsetForName(JNIEnv* env, jobject o, jstring name))
2420 ResourceMark rm;
2421 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2422 jint result = (jint)CDSConstants::get_cds_offset(c_name);
2423 return result;
2424 WB_END
2425
2426 WB_ENTRY(jint, WB_GetCDSConstantForName(JNIEnv* env, jobject o, jstring name))
2427 ResourceMark rm;
2428 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2429 jint result = (jint)CDSConstants::get_cds_constant(c_name);
2430 return result;
2431 WB_END
2432
2433 #endif // INCLUDE_CDS
2434
2435 WB_ENTRY(jboolean, WB_HandshakeReadMonitors(JNIEnv* env, jobject wb, jobject thread_handle))
2436 class ReadMonitorsHandshakeClosure : public HandshakeClosure {
2437 jboolean _executed;
2438
2439 void do_thread(Thread* th) {
2440 JavaThread* jt = JavaThread::cast(th);
2441 ResourceMark rm;
2442
2443 GrowableArray<MonitorInfo*>* info = new GrowableArray<MonitorInfo*>();
2444
2445 if (!jt->has_last_Java_frame()) {
2446 return;
2447 }
2448 RegisterMap rmap(jt,
2449 RegisterMap::UpdateMap::include,
2450 RegisterMap::ProcessFrames::include,
2451 RegisterMap::WalkContinuation::skip);
2452 for (javaVFrame* vf = jt->last_java_vframe(&rmap); vf != nullptr; vf = vf->java_sender()) {
2453 GrowableArray<MonitorInfo*> *monitors = vf->monitors();
2454 if (monitors != nullptr) {
2455 int len = monitors->length();
2456 // Walk monitors youngest to oldest
2457 for (int i = len - 1; i >= 0; i--) {
2458 MonitorInfo* mon_info = monitors->at(i);
2459 if (mon_info->eliminated()) continue;
2460 oop owner = mon_info->owner();
2461 if (owner != nullptr) {
2462 info->append(mon_info);
2463 }
2464 }
2465 }
2466 }
2467 _executed = true;
2468 }
2469
2470 public:
2471 ReadMonitorsHandshakeClosure() : HandshakeClosure("WB_HandshakeReadMonitors"), _executed(false) {}
2472 jboolean executed() const { return _executed; }
2473 };
2474
2475 ReadMonitorsHandshakeClosure rmhc;
2476 if (thread_handle != nullptr) {
2477 ThreadsListHandle tlh;
2478 JavaThread* target = nullptr;
2479 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2480 if (is_alive) {
2481 Handshake::execute(&rmhc, &tlh, target);
2482 }
2483 }
2484 return rmhc.executed();
2485 WB_END
2486
2487 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
2488 class TraceSelfHandshakeClosure : public HandshakeClosure {
2489 jint _num_threads_completed;
2490
2491 void do_thread(Thread* th) {
2492 JavaThread* jt = JavaThread::cast(th);
2493 ResourceMark rm;
2494
2495 jt->print_on(tty);
2496 jt->print_stack_on(tty);
2497 tty->cr();
2498 AtomicAccess::inc(&_num_threads_completed);
2499 }
2500
2501 public:
2502 TraceSelfHandshakeClosure(Thread* thread) : HandshakeClosure("WB_TraceSelf"), _num_threads_completed(0) {}
2503
2504 jint num_threads_completed() const { return _num_threads_completed; }
2505 };
2506 TraceSelfHandshakeClosure tshc(Thread::current());
2507
2508 if (all_threads) {
2509 Handshake::execute(&tshc);
2510 } else if (thread_handle != nullptr) {
2511 ThreadsListHandle tlh;
2512 JavaThread* target = nullptr;
2513 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2514 if (is_alive) {
2515 Handshake::execute(&tshc, &tlh, target);
2516 }
2517 }
2518 return tshc.num_threads_completed();
2519 WB_END
2520
2521 WB_ENTRY(void, WB_AsyncHandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle))
2522 class TraceSelfHandshakeClosure : public AsyncHandshakeClosure {
2523 JavaThread* _self;
2524 void do_thread(Thread* th) {
2525 assert(th->is_Java_thread(), "sanity");
2526 // AsynchHandshake handshakes are only executed by target.
2527 assert(_self == th, "Must be");
2528 assert(Thread::current() == th, "Must be");
2529 JavaThread* jt = JavaThread::cast(th);
2530 ResourceMark rm;
2531 jt->print_on(tty);
2532 jt->print_stack_on(tty);
2533 tty->cr();
2534 }
2535
2536 public:
2537 TraceSelfHandshakeClosure(JavaThread* self_target) : AsyncHandshakeClosure("WB_TraceSelf"), _self(self_target) {}
2538 };
2539 if (thread_handle != nullptr) {
2540 ThreadsListHandle tlh;
2541 JavaThread* target = nullptr;
2542 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2543 if (is_alive) {
2544 TraceSelfHandshakeClosure* tshc = new TraceSelfHandshakeClosure(target);
2545 Handshake::execute(tshc, target);
2546 }
2547 }
2548 WB_END
2549
2550 static volatile int _emulated_lock = 0;
2551
2552 WB_ENTRY(void, WB_LockAndBlock(JNIEnv* env, jobject wb, jboolean suspender))
2553 JavaThread* self = JavaThread::current();
2554
2555 {
2556 // Before trying to acquire the lock transition into a safepoint safe state.
2557 // Otherwise if either suspender or suspendee blocks for a safepoint
2558 // in ~ThreadBlockInVM the other one could loop forever trying to acquire
2559 // the lock without allowing the safepoint to progress.
2560 ThreadBlockInVM tbivm(self);
2561
2562 // We will deadlock here if we are 'suspender' and 'suspendee'
2563 // suspended in ~ThreadBlockInVM. This verifies we only suspend
2564 // at the right place.
2565 while (AtomicAccess::cmpxchg(&_emulated_lock, 0, 1) != 0) {}
2566 assert(_emulated_lock == 1, "Must be locked");
2567
2568 // Sleep much longer in suspendee to force situation where
2569 // 'suspender' is waiting above to acquire lock.
2570 os::naked_short_sleep(suspender ? 1 : 10);
2571 }
2572 AtomicAccess::store(&_emulated_lock, 0);
2573 WB_END
2574
2575 // Some convenience methods to deal with objects from java
2576 int WhiteBox::offset_for_field(const char* field_name, oop object,
2577 Symbol* signature_symbol) {
2578 assert(field_name != nullptr && strlen(field_name) > 0, "Field name not valid");
2579
2580 //Only non-array oops have fields. Don't call this function on arrays!
2581 InstanceKlass* ik = InstanceKlass::cast(object->klass());
2582
2583 //Create symbols to look for in the class
2584 TempNewSymbol name_symbol = SymbolTable::new_symbol(field_name);
2585
2586 //To be filled in with an offset of the field we're looking for
2587 fieldDescriptor fd;
2588
2589 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2590 if (res == nullptr) {
2591 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2592 name_symbol->as_C_string());
2593 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2594 }
2595
2596 //fetch the field at the offset we've found
2597 int dest_offset = fd.offset();
2598
2599 return dest_offset;
2600 }
2601
2602
2603 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2604 int offset = offset_for_field(field_name, object,
2605 vmSymbols::string_signature());
2606 oop string = object->obj_field(offset);
2607 if (string == nullptr) {
2608 return nullptr;
2609 }
2610 const char* ret = java_lang_String::as_utf8_string(string);
2611 return ret;
2612 }
2613
2614 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2615 int offset =
2616 offset_for_field(field_name, object, vmSymbols::bool_signature());
2617 bool ret = (object->bool_field(offset) == JNI_TRUE);
2618 return ret;
2619 }
2620
2621 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2622 ResourceMark rm;
2623 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(wbclass));
2624 const char* klass_name = klass->external_name();
2625
2626 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2627
2628 // one by one registration natives for exception catching
2629 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2630 CHECK_JNI_EXCEPTION(env);
2631 for (int i = 0, n = method_count; i < n; ++i) {
2632 // Skip dummy entries
2633 if (method_array[i].fnPtr == nullptr) continue;
2634 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2635 jthrowable throwable_obj = env->ExceptionOccurred();
2636 if (throwable_obj != nullptr) {
2637 env->ExceptionClear();
2638 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2639 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2640 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2641 tty->print_cr("Warning: 'NoSuchMethodError' on register of %s::%s%s",
2642 klass_name, method_array[i].name, method_array[i].signature);
2643 }
2644 } else {
2645 // Registration failed unexpectedly.
2646 tty->print_cr("Warning: unexpected error on register of %s::%s%s. All methods will be unregistered",
2647 klass_name, method_array[i].name, method_array[i].signature);
2648 env->UnregisterNatives(wbclass);
2649 break;
2650 }
2651 }
2652 }
2653 }
2654
2655 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2656 // can't be in VM when we call JNI
2657 ThreadToNativeFromVM ttnfv(thread);
2658 const char* dir = env->GetStringUTFChars(compDirect, nullptr);
2659 CHECK_JNI_EXCEPTION_(env, 0);
2660 int ret;
2661 {
2662 ThreadInVMfromNative ttvfn(thread); // back to VM
2663 ret = DirectivesParser::parse_string(dir, tty);
2664 }
2665 env->ReleaseStringUTFChars(compDirect, dir);
2666 // -1 for error parsing directive. Return 0 as number of directives added.
2667 if (ret == -1) {
2668 ret = 0;
2669 }
2670 return (jint) ret;
2671 WB_END
2672
2673 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2674 DirectivesStack::pop(count);
2675 WB_END
2676
2677 // Checks that the library libfile has the noexecstack bit set.
2678 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2679 jboolean ret = false;
2680 #ifdef LINUX
2681 // Can't be in VM when we call JNI.
2682 ThreadToNativeFromVM ttnfv(thread);
2683 const char* lf = env->GetStringUTFChars(libfile, nullptr);
2684 CHECK_JNI_EXCEPTION_(env, 0);
2685 ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2686 env->ReleaseStringUTFChars(libfile, lf);
2687 #endif
2688 return ret;
2689 WB_END
2690
2691 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2692 LINUX_ONLY(return OSContainer::is_containerized();)
2693 return false;
2694 WB_END
2695
2696 // Physical memory of the host machine (including containers)
2697 WB_ENTRY(jlong, WB_HostPhysicalMemory(JNIEnv* env, jobject o))
2698 LINUX_ONLY(return static_cast<jlong>(os::Linux::physical_memory());)
2699 return static_cast<jlong>(os::physical_memory());
2700 WB_END
2701
2702 // Available memory of the host machine (container-aware)
2703 WB_ENTRY(jlong, WB_HostAvailableMemory(JNIEnv* env, jobject o))
2704 physical_memory_size_type avail_mem = 0;
2705 // Return value ignored - defaulting to 0 on failure.
2706 (void)os::available_memory(avail_mem);
2707 return static_cast<jlong>(avail_mem);
2708 WB_END
2709
2710 // Physical swap of the host machine (including containers), Linux only.
2711 WB_ENTRY(jlong, WB_HostPhysicalSwap(JNIEnv* env, jobject o))
2712 #ifdef LINUX
2713 physical_memory_size_type swap_val = 0;
2714 if (!os::Linux::host_swap(swap_val)) {
2715 return -1; // treat as unlimited
2716 }
2717 return static_cast<jlong>(swap_val);
2718 #endif
2719 return -1; // Not used/implemented on other platforms
2720 WB_END
2721
2722 WB_ENTRY(jint, WB_ValidateCgroup(JNIEnv* env,
2723 jobject o,
2724 jboolean cgroups_v2_enabled,
2725 jstring controllers_file,
2726 jstring proc_self_cgroup,
2727 jstring proc_self_mountinfo))
2728 jint ret = 0;
2729 #ifdef LINUX
2730 ThreadToNativeFromVM ttnfv(thread);
2731 const char* c_file = env->GetStringUTFChars(controllers_file, nullptr);
2732 CHECK_JNI_EXCEPTION_(env, 0);
2733 const char* p_s_cgroup = env->GetStringUTFChars(proc_self_cgroup, nullptr);
2734 CHECK_JNI_EXCEPTION_(env, 0);
2735 const char* p_s_mountinfo = env->GetStringUTFChars(proc_self_mountinfo, nullptr);
2736 CHECK_JNI_EXCEPTION_(env, 0);
2737 u1 cg_type_flags = 0;
2738 // This sets cg_type_flags
2739 WhiteBox::validate_cgroup(cgroups_v2_enabled, c_file, p_s_cgroup, p_s_mountinfo, &cg_type_flags);
2740 ret = (jint)cg_type_flags;
2741 env->ReleaseStringUTFChars(controllers_file, c_file);
2742 env->ReleaseStringUTFChars(proc_self_cgroup, p_s_cgroup);
2743 env->ReleaseStringUTFChars(proc_self_mountinfo, p_s_mountinfo);
2744 #endif
2745 return ret;
2746 WB_END
2747
2748 // Available cpus of the host machine, Linux only.
2749 // Used in container testing.
2750 WB_ENTRY(jint, WB_HostCPUs(JNIEnv* env, jobject o))
2751 LINUX_ONLY(return os::Linux::active_processor_count();)
2752 return -1; // Not used/implemented on other platforms
2753 WB_END
2754
2755 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2756 os::print_os_info(tty);
2757 WB_END
2758
2759 // Elf decoder
2760 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2761 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2762 ElfFile::_do_not_cache_elf_section = true;
2763 #endif
2764 WB_END
2765
2766 WB_ENTRY(jlong, WB_ResolvedMethodItemsCount(JNIEnv* env, jobject o))
2767 return (jlong) ResolvedMethodTable::items_count();
2768 WB_END
2769
2770 WB_ENTRY(jint, WB_GetKlassMetadataSize(JNIEnv* env, jobject wb, jclass mirror))
2771 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(mirror));
2772 // Return size in bytes.
2773 return k->size() * wordSize;
2774 WB_END
2775
2776 // See test/hotspot/jtreg/runtime/Thread/ThreadObjAccessAtExit.java.
2777 // It explains how the thread's priority field is used for test state coordination.
2778 //
2779 WB_ENTRY(void, WB_CheckThreadObjOfTerminatingThread(JNIEnv* env, jobject wb, jobject target_handle))
2780 oop target_oop = JNIHandles::resolve_non_null(target_handle);
2781 jlong tid = java_lang_Thread::thread_id(target_oop);
2782 JavaThread* target = java_lang_Thread::thread(target_oop);
2783
2784 // Grab a ThreadsListHandle to protect the target thread whilst terminating
2785 ThreadsListHandle tlh;
2786
2787 // Look up the target thread by tid to ensure it is present
2788 JavaThread* t = tlh.list()->find_JavaThread_from_java_tid(tid);
2789 if (t == nullptr) {
2790 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread not found in ThreadsList!");
2791 }
2792
2793 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is protected");
2794 // Allow target to terminate by boosting priority
2795 java_lang_Thread::set_priority(t->threadObj(), ThreadPriority(NormPriority + 1));
2796
2797 // Now wait for the target to terminate
2798 while (!target->is_terminated()) {
2799 ThreadBlockInVM tbivm(thread); // just in case target is involved in a safepoint
2800 os::naked_short_sleep(0);
2801 }
2802
2803 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is terminated");
2804
2805 // Now release the GC inducing thread - we have to re-resolve the external oop that
2806 // was passed in as GC may have occurred and we don't know if we can trust t->threadObj() now.
2807 oop original = JNIHandles::resolve_non_null(target_handle);
2808 java_lang_Thread::set_priority(original, ThreadPriority(NormPriority + 2));
2809
2810 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: GC has been initiated - checking threadObj:");
2811
2812 // The Java code should be creating garbage and triggering GC, which would potentially move
2813 // the threadObj oop. If the exiting thread is properly protected then its threadObj should
2814 // remain valid and equal to our initial target_handle. Loop a few times to give GC a chance to
2815 // kick in.
2816 for (int i = 0; i < 5; i++) {
2817 oop original = JNIHandles::resolve_non_null(target_handle);
2818 oop current = t->threadObj();
2819 if (original != current) {
2820 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: failed comparison on iteration %d", i);
2821 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread oop has changed!");
2822 } else {
2823 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: successful comparison on iteration %d", i);
2824 ThreadBlockInVM tbivm(thread);
2825 os::naked_short_sleep(50);
2826 }
2827 }
2828 WB_END
2829
2830 WB_ENTRY(void, WB_VerifyFrames(JNIEnv* env, jobject wb, jboolean log, jboolean update_map))
2831 ResourceMark rm; // for verify
2832 stringStream st;
2833 for (StackFrameStream fst(JavaThread::current(), update_map, true); !fst.is_done(); fst.next()) {
2834 frame* current_frame = fst.current();
2835 if (log) {
2836 current_frame->print_value_on(&st);
2837 }
2838 current_frame->verify(fst.register_map());
2839 }
2840 if (log) {
2841 tty->print_cr("[WhiteBox::VerifyFrames] Walking Frames");
2842 tty->print_raw(st.freeze());
2843 tty->print_cr("[WhiteBox::VerifyFrames] Done");
2844 }
2845 WB_END
2846
2847 WB_ENTRY(jboolean, WB_IsJVMTIIncluded(JNIEnv* env, jobject wb))
2848 #if INCLUDE_JVMTI
2849 return JNI_TRUE;
2850 #else
2851 return JNI_FALSE;
2852 #endif
2853 WB_END
2854
2855 WB_ENTRY(void, WB_WaitUnsafe(JNIEnv* env, jobject wb, jint time))
2856 os::naked_short_sleep(time);
2857 WB_END
2858
2859 WB_ENTRY(void, WB_BusyWaitCPUTime(JNIEnv* env, jobject wb, jint time))
2860 ThreadToNativeFromVM ttn(thread);
2861 u8 start = os::current_thread_cpu_time();
2862 u8 target_duration = time * (u8)1000000;
2863 while (os::current_thread_cpu_time() - start < target_duration) {
2864 for (volatile int i = 0; i < 1000000; i++);
2865 }
2866 WB_END
2867
2868 WB_ENTRY(jboolean, WB_CPUSamplerSetOutOfStackWalking(JNIEnv* env, jobject wb, jboolean enable))
2869 #if defined(ASSERT) && INCLUDE_JFR && defined(LINUX)
2870 return JfrCPUTimeThreadSampling::set_out_of_stack_walking_enabled(enable == JNI_TRUE) ? JNI_TRUE : JNI_FALSE;
2871 #else
2872 return JNI_FALSE;
2873 #endif
2874 WB_END
2875
2876 WB_ENTRY(jstring, WB_GetLibcName(JNIEnv* env, jobject o))
2877 ThreadToNativeFromVM ttn(thread);
2878 jstring info_string = env->NewStringUTF(XSTR(LIBC));
2879 CHECK_JNI_EXCEPTION_(env, nullptr);
2880 return info_string;
2881 WB_END
2882
2883 WB_ENTRY(void, WB_PinObject(JNIEnv* env, jobject wb, jobject o))
2884 #if INCLUDE_G1GC
2885 if (!UseG1GC) {
2886 ShouldNotReachHere();
2887 return;
2888 }
2889 oop obj = JNIHandles::resolve(o);
2890 G1CollectedHeap::heap()->pin_object(thread, obj);
2891 #else
2892 ShouldNotReachHere();
2893 #endif // INCLUDE_G1GC
2894 WB_END
2895
2896 WB_ENTRY(void, WB_UnpinObject(JNIEnv* env, jobject wb, jobject o))
2897 #if INCLUDE_G1GC
2898 if (!UseG1GC) {
2899 ShouldNotReachHere();
2900 return;
2901 }
2902 oop obj = JNIHandles::resolve(o);
2903 G1CollectedHeap::heap()->unpin_object(thread, obj);
2904 #else
2905 ShouldNotReachHere();
2906 #endif // INCLUDE_G1GC
2907 WB_END
2908
2909 WB_ENTRY(jboolean, WB_SetVirtualThreadsNotifyJvmtiMode(JNIEnv* env, jobject wb, jboolean enable))
2910 if (!Continuations::enabled()) {
2911 tty->print_cr("WB error: must be Continuations::enabled()!");
2912 return JNI_FALSE;
2913 }
2914 jboolean result = false;
2915 #if INCLUDE_JVMTI
2916 if (enable) {
2917 result = JvmtiEnvBase::enable_virtual_threads_notify_jvmti();
2918 } else {
2919 result = JvmtiEnvBase::disable_virtual_threads_notify_jvmti();
2920 }
2921 #endif
2922 return result;
2923 WB_END
2924
2925 WB_ENTRY(void, WB_PreTouchMemory(JNIEnv* env, jobject wb, jlong addr, jlong size))
2926 void* const from = (void*)addr;
2927 void* const to = (void*)(addr + size);
2928 if (from > to) {
2929 os::pretouch_memory(from, to, os::vm_page_size());
2930 }
2931 WB_END
2932
2933 WB_ENTRY(void, WB_CleanMetaspaces(JNIEnv* env, jobject target))
2934 ClassLoaderDataGraph::safepoint_and_clean_metaspaces();
2935 WB_END
2936
2937 // Reports resident set size (RSS) in bytes
2938 WB_ENTRY(jlong, WB_Rss(JNIEnv* env, jobject o))
2939 return os::rss();
2940 WB_END
2941
2942 WB_ENTRY(void, WB_ControlledCrash(JNIEnv* env, jobject o, jint how))
2943 #ifdef ASSERT
2944 VMError::controlled_crash(how);
2945 #else
2946 THROW_MSG(vmSymbols::java_lang_UnsupportedOperationException(), "Only available in debug builds");
2947 #endif
2948 WB_END
2949
2950 #define CC (char*)
2951
2952 static JNINativeMethod methods[] = {
2953 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
2954 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
2955 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
2956 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
2957 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
2958 {CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
2959 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
2960 {CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
2961 {CC"getHeapAlignment", CC"()J", (void*)&WB_GetHeapAlignment},
2962 {CC"shipsFullDebugInfo", CC"()Z", (void*)&WB_ShipDebugInfoFull},
2963 {CC"shipsPublicDebugInfo", CC"()Z", (void*)&WB_ShipDebugInfoPublic},
2964 {CC"countAliveClasses0", CC"(Ljava/lang/String;)I", (void*)&WB_CountAliveClasses },
2965 {CC"getSymbolRefcount", CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2966 {CC"parseCommandLine0",
2967 CC"(Ljava/lang/String;C[Ljdk/test/whitebox/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2968 (void*) &WB_ParseCommandLine
2969 },
2970 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2971 (void*)&WB_AddToBootstrapClassLoaderSearch},
2972 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2973 (void*)&WB_AddToSystemClassLoaderSearch},
2974 {CC"getCompressedOopsMaxHeapSize", CC"()J",
2975 (void*)&WB_GetCompressedOopsMaxHeapSize},
2976 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
2977 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
2978 {CC"decodeNKlassAndAccessKlass",CC"(I)V", (void*)&WB_DecodeNKlassAndAccessKlass},
2979 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
2980 #if INCLUDE_CDS
2981 {CC"getCDSOffsetForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSOffsetForName},
2982 {CC"getCDSConstantForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSConstantForName},
2983 #endif
2984 #if INCLUDE_G1GC
2985 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
2986 {CC"g1CompletedConcurrentMarkCycles", CC"()I", (void*)&WB_G1CompletedConcurrentMarkCycles},
2987 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
2988 {CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
2989 {CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
2990 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
2991 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
2992 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
2993 {CC"g1HasRegionsToUncommit", CC"()Z", (void*)&WB_G1HasRegionsToUncommit},
2994 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2995 (void*)&WB_G1AuxiliaryMemoryUsage },
2996 {CC"g1ActiveMemoryNodeCount", CC"()I", (void*)&WB_G1ActiveMemoryNodeCount },
2997 {CC"g1MemoryNodeIds", CC"()[I", (void*)&WB_G1MemoryNodeIds },
2998 {CC"g1GetMixedGCInfo", CC"(I)[J", (void*)&WB_G1GetMixedGCInfo },
2999 #endif // INCLUDE_G1GC
3000 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
3001 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
3002 {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J", (void*)&WB_NMTMallocWithPseudoStackAndType},
3003 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
3004 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
3005 {CC"NMTAttemptReserveMemoryAt", CC"(JJ)J", (void*)&WB_NMTAttemptReserveMemoryAt },
3006 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
3007 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
3008 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
3009 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
3010 {CC"NMTNewArena", CC"(J)J", (void*)&WB_NMTNewArena },
3011 {CC"NMTFreeArena", CC"(J)V", (void*)&WB_NMTFreeArena },
3012 {CC"NMTArenaMalloc", CC"(JJ)V", (void*)&WB_NMTArenaMalloc },
3013 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
3014 {CC"isFrameDeoptimized", CC"(I)Z", (void*)&WB_IsFrameDeoptimized},
3015 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
3016 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
3017 (void*)&WB_DeoptimizeMethod },
3018 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
3019 (void*)&WB_IsMethodCompiled },
3020 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
3021 (void*)&WB_IsMethodCompilable},
3022 {CC"isMethodQueuedForCompilation0",
3023 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
3024 {CC"isIntrinsicAvailable0",
3025 CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
3026 (void*)&WB_IsIntrinsicAvailable},
3027 {CC"makeMethodNotCompilable0",
3028 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
3029 {CC"testSetDontInlineMethod0",
3030 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
3031 {CC"getMethodCompilationLevel0",
3032 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
3033 {CC"getMethodDecompileCount0",
3034 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodDecompileCount},
3035 {CC"getMethodTrapCount0",
3036 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
3037 (void*)&WB_GetMethodTrapCount},
3038 {CC"getDeoptCount0",
3039 CC"(Ljava/lang/String;Ljava/lang/String;)I", (void*)&WB_GetDeoptCount},
3040 {CC"getMethodEntryBci0",
3041 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
3042 {CC"getCompileQueueSize",
3043 CC"(I)I", (void*)&WB_GetCompileQueueSize},
3044 {CC"testSetForceInlineMethod0",
3045 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
3046 {CC"enqueueMethodForCompilation0",
3047 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
3048 {CC"enqueueInitializerForCompilation0",
3049 CC"(Ljava/lang/Class;I)Z", (void*)&WB_EnqueueInitializerForCompilation},
3050 {CC"markMethodProfiled",
3051 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_MarkMethodProfiled},
3052 {CC"clearMethodState0",
3053 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
3054 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
3055 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
3056 {CC"matchesMethod",
3057 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
3058 (void*)&WB_MatchesMethod},
3059 {CC"matchesInline",
3060 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
3061 (void*)&WB_MatchesInline},
3062 {CC"shouldPrintAssembly",
3063 CC"(Ljava/lang/reflect/Executable;I)Z",
3064 (void*)&WB_ShouldPrintAssembly},
3065
3066 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
3067 {CC"isDefaultVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsDefaultVMFlag},
3068 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
3069 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
3070 {CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
3071 {CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
3072 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
3073 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
3074 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
3075 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
3076 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
3077 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
3078 (void*)&WB_SetStringVMFlag},
3079 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
3080 (void*)&WB_GetBooleanVMFlag},
3081 {CC"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3082 (void*)&WB_GetIntVMFlag},
3083 {CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3084 (void*)&WB_GetUintVMFlag},
3085 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3086 (void*)&WB_GetIntxVMFlag},
3087 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3088 (void*)&WB_GetUintxVMFlag},
3089 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3090 (void*)&WB_GetUint64VMFlag},
3091 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3092 (void*)&WB_GetSizeTVMFlag},
3093 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
3094 (void*)&WB_GetDoubleVMFlag},
3095 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
3096 (void*)&WB_GetStringVMFlag},
3097 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
3098 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
3099 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
3100 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
3101 {CC"allocateMetaspace",
3102 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
3103 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
3104 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
3105 {CC"metaspaceSharedRegionAlignment", CC"()J", (void*)&WB_AOTMetaspaceRegionAlignment },
3106 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
3107 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
3108 (void*)&WB_GetNMethod },
3109 {CC"relocateNMethodFromMethod0", CC"(Ljava/lang/reflect/Executable;I)V",
3110 (void*)&WB_RelocateNMethodFromMethod },
3111 {CC"relocateNMethodFromAddr", CC"(JI)V", (void*)&WB_RelocateNMethodFromAddr },
3112 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
3113 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
3114 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
3115 {CC"getCompilationActivityMode",
3116 CC"()I", (void*)&WB_GetCompilationActivityMode},
3117 {CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
3118 (void*)&WB_GetMethodData },
3119 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
3120 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
3121 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
3122 {CC"DefineModule", CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
3123 (void*)&WB_DefineModule },
3124 {CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
3125 (void*)&WB_AddModuleExports },
3126 {CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
3127 (void*)&WB_AddReadsModule },
3128 {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
3129 (void*)&WB_AddModuleExportsToAllUnnamed },
3130 {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
3131 (void*)&WB_AddModuleExportsToAll },
3132 {CC"deflateIdleMonitors", CC"()Z", (void*)&WB_DeflateIdleMonitors },
3133 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
3134 {CC"isAsanEnabled", CC"()Z", (void*)&WB_IsAsanEnabled },
3135 {CC"isUbsanEnabled", CC"()Z", (void*)&WB_IsUbsanEnabled },
3136 {CC"getInUseMonitorCount", CC"()J", (void*)&WB_getInUseMonitorCount },
3137 {CC"getLockStackCapacity", CC"()I", (void*)&WB_getLockStackCapacity },
3138 {CC"supportsRecursiveFastLocking", CC"()Z", (void*)&WB_supportsRecursiveFastLocking },
3139 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
3140 {CC"forceClassLoaderStatsSafepoint", CC"()V", (void*)&WB_ForceClassLoaderStatsSafepoint },
3141 {CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
3142 {CC"getResolvedReferences0", CC"(Ljava/lang/Class;)[Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
3143 {CC"getObjectsViaKlassOopMaps0",
3144 CC"(Ljava/lang/Object;)[Ljava/lang/Object;", (void*)&WB_getObjectsViaKlassOopMaps},
3145 {CC"getObjectsViaOopIterator0",
3146 CC"(Ljava/lang/Object;)[Ljava/lang/Object;",(void*)&WB_getObjectsViaOopIterator},
3147 {CC"getObjectsViaFrameOopIterator",
3148 CC"(I)[Ljava/lang/Object;", (void*)&WB_getObjectsViaFrameOopIterator},
3149 {CC"getFieldEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getFieldEntriesLength},
3150 {CC"getFieldCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getFieldCPIndex},
3151 {CC"getMethodEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getMethodEntriesLength},
3152 {CC"getMethodCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getMethodCPIndex},
3153 {CC"getIndyInfoLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getIndyInfoLength},
3154 {CC"getIndyCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getIndyCPIndex},
3155 {CC"printClasses0", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printClasses},
3156 {CC"printMethods0", CC"(Ljava/lang/String;Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printMethods},
3157 {CC"getMethodBooleanOption",
3158 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
3159 (void*)&WB_GetMethodBooleaneOption},
3160 {CC"getMethodIntxOption",
3161 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
3162 (void*)&WB_GetMethodIntxOption},
3163 {CC"getMethodUintxOption",
3164 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
3165 (void*)&WB_GetMethodUintxOption},
3166 {CC"getMethodDoubleOption",
3167 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
3168 (void*)&WB_GetMethodDoubleOption},
3169 {CC"getMethodStringOption",
3170 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
3171 (void*)&WB_GetMethodStringOption},
3172 {CC"getDefaultArchivePath", CC"()Ljava/lang/String;",
3173 (void*)&WB_GetDefaultArchivePath},
3174 {CC"getCDSGenericHeaderMinVersion", CC"()I", (void*)&WB_GetCDSGenericHeaderMinVersion},
3175 {CC"getCurrentCDSVersion", CC"()I", (void*)&WB_GetCDSCurrentVersion},
3176 {CC"isSharingEnabled", CC"()Z", (void*)&WB_IsSharingEnabled},
3177 {CC"isSharedInternedString", CC"(Ljava/lang/String;)Z", (void*)&WB_IsSharedInternedString },
3178 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
3179 {CC"areSharedStringsMapped", CC"()Z", (void*)&WB_AreSharedStringsMapped },
3180 {CC"linkClass", CC"(Ljava/lang/Class;)V", (void*)&WB_LinkClass},
3181 {CC"areOpenArchiveHeapObjectsMapped", CC"()Z", (void*)&WB_AreOpenArchiveHeapObjectsMapped},
3182 {CC"isCDSIncluded", CC"()Z", (void*)&WB_IsCDSIncluded },
3183 {CC"isJFRIncluded", CC"()Z", (void*)&WB_IsJFRIncluded },
3184 {CC"isDTraceIncluded", CC"()Z", (void*)&WB_IsDTraceIncluded },
3185 {CC"hasLibgraal", CC"()Z", (void*)&WB_HasLibgraal },
3186 {CC"isC2OrJVMCIIncluded", CC"()Z", (void*)&WB_isC2OrJVMCIIncluded },
3187 {CC"isJVMCISupportedByGC", CC"()Z", (void*)&WB_IsJVMCISupportedByGC},
3188 {CC"canWriteJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteJavaHeapArchive },
3189 {CC"canWriteMappedJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteMappedJavaHeapArchive },
3190 {CC"canWriteStreamedJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteStreamedJavaHeapArchive },
3191 {CC"cdsMemoryMappingFailed", CC"()Z", (void*)&WB_CDSMemoryMappingFailed },
3192
3193 {CC"clearInlineCaches0", CC"(Z)V", (void*)&WB_ClearInlineCaches },
3194 {CC"handshakeReadMonitors", CC"(Ljava/lang/Thread;)Z", (void*)&WB_HandshakeReadMonitors },
3195 {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
3196 {CC"asyncHandshakeWalkStack", CC"(Ljava/lang/Thread;)V", (void*)&WB_AsyncHandshakeWalkStack },
3197 {CC"lockAndBlock", CC"(Z)V", (void*)&WB_LockAndBlock},
3198 {CC"checkThreadObjOfTerminatingThread", CC"(Ljava/lang/Thread;)V", (void*)&WB_CheckThreadObjOfTerminatingThread },
3199 {CC"verifyFrames", CC"(ZZ)V", (void*)&WB_VerifyFrames },
3200 {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
3201 (void*)&WB_AddCompilerDirective },
3202 {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
3203 {CC"isGCSupported", CC"(I)Z", (void*)&WB_IsGCSupported},
3204 {CC"isGCSupportedByJVMCICompiler", CC"(I)Z", (void*)&WB_IsGCSupportedByJVMCICompiler},
3205 {CC"isGCSelected", CC"(I)Z", (void*)&WB_IsGCSelected},
3206 {CC"isGCSelectedErgonomically", CC"()Z", (void*)&WB_IsGCSelectedErgonomically},
3207 {CC"supportsConcurrentGCBreakpoints", CC"()Z", (void*)&WB_SupportsConcurrentGCBreakpoints},
3208 {CC"concurrentGCAcquireControl0", CC"()V", (void*)&WB_ConcurrentGCAcquireControl},
3209 {CC"concurrentGCReleaseControl0", CC"()V", (void*)&WB_ConcurrentGCReleaseControl},
3210 {CC"concurrentGCRunToIdle0", CC"()V", (void*)&WB_ConcurrentGCRunToIdle},
3211 {CC"concurrentGCRunTo0", CC"(Ljava/lang/String;)Z",
3212 (void*)&WB_ConcurrentGCRunTo},
3213 {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
3214 (void*)&WB_CheckLibSpecifiesNoexecstack},
3215 {CC"isContainerized", CC"()Z", (void*)&WB_IsContainerized },
3216 {CC"validateCgroup",
3217 CC"(ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
3218 (void*)&WB_ValidateCgroup },
3219 {CC"hostPhysicalMemory", CC"()J", (void*)&WB_HostPhysicalMemory },
3220 {CC"hostPhysicalSwap", CC"()J", (void*)&WB_HostPhysicalSwap },
3221 {CC"hostAvailableMemory", CC"()J", (void*)&WB_HostAvailableMemory },
3222 {CC"hostCPUs", CC"()I", (void*)&WB_HostCPUs },
3223 {CC"printOsInfo", CC"()V", (void*)&WB_PrintOsInfo },
3224 {CC"disableElfSectionCache", CC"()V", (void*)&WB_DisableElfSectionCache },
3225 {CC"resolvedMethodItemsCount", CC"()J", (void*)&WB_ResolvedMethodItemsCount },
3226 {CC"getKlassMetadataSize", CC"(Ljava/lang/Class;)I",(void*)&WB_GetKlassMetadataSize},
3227
3228 {CC"createMetaspaceTestContext", CC"(JJ)J", (void*)&WB_CreateMetaspaceTestContext},
3229 {CC"destroyMetaspaceTestContext", CC"(J)V", (void*)&WB_DestroyMetaspaceTestContext},
3230 {CC"purgeMetaspaceTestContext", CC"(J)V", (void*)&WB_PurgeMetaspaceTestContext},
3231 {CC"printMetaspaceTestContext", CC"(J)V", (void*)&WB_PrintMetaspaceTestContext},
3232 {CC"getTotalCommittedBytesInMetaspaceTestContext", CC"(J)J",(void*)&WB_GetTotalCommittedBytesInMetaspaceTestContext},
3233 {CC"getTotalUsedBytesInMetaspaceTestContext", CC"(J)J", (void*)&WB_GetTotalUsedBytesInMetaspaceTestContext},
3234 {CC"createArenaInTestContext", CC"(JZ)J", (void*)&WB_CreateArenaInTestContext},
3235 {CC"destroyMetaspaceTestArena", CC"(J)V", (void*)&WB_DestroyMetaspaceTestArena},
3236 {CC"allocateFromMetaspaceTestArena", CC"(JJ)J", (void*)&WB_AllocateFromMetaspaceTestArena},
3237 {CC"deallocateToMetaspaceTestArena", CC"(JJJ)V", (void*)&WB_DeallocateToMetaspaceTestArena},
3238 {CC"maxMetaspaceAllocationSize", CC"()J", (void*)&WB_GetMaxMetaspaceAllocationSize},
3239
3240 {CC"isJVMTIIncluded", CC"()Z", (void*)&WB_IsJVMTIIncluded},
3241 {CC"waitUnsafe", CC"(I)V", (void*)&WB_WaitUnsafe},
3242 {CC"busyWaitCPUTime", CC"(I)V", (void*)&WB_BusyWaitCPUTime},
3243 {CC"cpuSamplerSetOutOfStackWalking", CC"(Z)Z", (void*)&WB_CPUSamplerSetOutOfStackWalking},
3244 {CC"getLibcName", CC"()Ljava/lang/String;", (void*)&WB_GetLibcName},
3245
3246 {CC"pinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_PinObject},
3247 {CC"unpinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_UnpinObject},
3248 {CC"setVirtualThreadsNotifyJvmtiMode", CC"(Z)Z", (void*)&WB_SetVirtualThreadsNotifyJvmtiMode},
3249 {CC"preTouchMemory", CC"(JJ)V", (void*)&WB_PreTouchMemory},
3250 {CC"cleanMetaspaces", CC"()V", (void*)&WB_CleanMetaspaces},
3251 {CC"rss", CC"()J", (void*)&WB_Rss},
3252 {CC"printString", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_PrintString},
3253 {CC"lockAndStuckInSafepoint", CC"()V", (void*)&WB_TakeLockAndHangInSafepoint},
3254 {CC"getMinimumJavaStackSize", CC"()J", (void*)&WB_GetMinimumJavaStackSize},
3255 {CC"wordSize", CC"()J", (void*)&WB_WordSize},
3256 {CC"rootChunkWordSize", CC"()J", (void*)&WB_RootChunkWordSize},
3257 {CC"isStatic", CC"()Z", (void*)&WB_IsStaticallyLinked},
3258 {CC"controlledCrash",CC"(I)V", (void*)&WB_ControlledCrash},
3259 };
3260
3261 #undef CC
3262
3263 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
3264 {
3265 if (WhiteBoxAPI) {
3266 // Make sure that wbclass is loaded by the null classloader
3267 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(wbclass));
3268 Handle loader(THREAD, ik->class_loader());
3269 if (loader.is_null()) {
3270 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
3271 WhiteBox::set_used();
3272 }
3273 }
3274 }
3275 JVM_END