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