1 /*
2 * Copyright (c) 2012, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds.h"
26 #include "cds/archiveHeapLoader.hpp"
27 #include "cds/cdsConstants.hpp"
28 #include "cds/filemap.hpp"
29 #include "cds/heapShared.hpp"
30 #include "cds/metaspaceShared.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 "compiler/compilationPolicy.hpp"
43 #include "compiler/compilerOracle.hpp"
44 #include "compiler/directivesParser.hpp"
45 #include "compiler/methodMatcher.hpp"
46 #include "gc/shared/concurrentGCBreakpoints.hpp"
47 #include "gc/shared/gcConfig.hpp"
48 #include "gc/shared/genArguments.hpp"
49 #include "jvm.h"
50 #include "jvmtifiles/jvmtiEnv.hpp"
51 #include "logging/log.hpp"
52 #include "memory/iterator.hpp"
53 #include "memory/memoryReserver.hpp"
54 #include "memory/metadataFactory.hpp"
55 #include "memory/metaspace/testHelpers.hpp"
56 #include "memory/metaspaceUtils.hpp"
57 #include "memory/oopFactory.hpp"
58 #include "memory/resourceArea.hpp"
59 #include "memory/universe.hpp"
60 #include "nmt/mallocSiteTable.hpp"
61 #include "oops/array.hpp"
62 #include "oops/compressedOops.hpp"
63 #include "oops/constantPool.inline.hpp"
64 #include "oops/klass.inline.hpp"
65 #include "oops/method.inline.hpp"
66 #include "oops/methodData.inline.hpp"
67 #include "oops/objArrayKlass.hpp"
68 #include "oops/objArrayOop.inline.hpp"
69 #include "oops/oop.inline.hpp"
70 #include "oops/typeArrayOop.inline.hpp"
71 #include "prims/jvmtiEnvBase.hpp"
72 #include "prims/resolvedMethodTable.hpp"
73 #include "prims/wbtestmethods/parserTests.hpp"
74 #include "prims/whitebox.inline.hpp"
75 #include "runtime/arguments.hpp"
76 #include "runtime/atomic.hpp"
77 #include "runtime/deoptimization.hpp"
78 #include "runtime/fieldDescriptor.inline.hpp"
79 #include "runtime/flags/jvmFlag.hpp"
80 #include "runtime/flags/jvmFlagAccess.hpp"
81 #include "runtime/frame.inline.hpp"
82 #include "runtime/handles.inline.hpp"
83 #include "runtime/handshake.hpp"
84 #include "runtime/interfaceSupport.inline.hpp"
85 #include "runtime/javaCalls.hpp"
86 #include "runtime/javaThread.inline.hpp"
87 #include "runtime/jniHandles.inline.hpp"
88 #include "runtime/lightweightSynchronizer.hpp"
89 #include "runtime/lockStack.hpp"
90 #include "runtime/os.hpp"
91 #include "runtime/stackFrameStream.inline.hpp"
92 #include "runtime/synchronizer.hpp"
93 #include "runtime/threadSMR.hpp"
94 #include "runtime/vframe.hpp"
95 #include "runtime/vm_version.hpp"
96 #include "services/memoryService.hpp"
97 #include "utilities/align.hpp"
98 #include "utilities/checkedCast.hpp"
99 #include "utilities/debug.hpp"
100 #include "utilities/elfFile.hpp"
101 #include "utilities/exceptions.hpp"
102 #include "utilities/macros.hpp"
103 #include "utilities/nativeCallStack.hpp"
104 #include "utilities/ostream.hpp"
105 #if INCLUDE_G1GC
106 #include "gc/g1/g1Arguments.hpp"
107 #include "gc/g1/g1CollectedHeap.inline.hpp"
108 #include "gc/g1/g1ConcurrentMark.hpp"
109 #include "gc/g1/g1ConcurrentMarkThread.inline.hpp"
110 #include "gc/g1/g1HeapRegionManager.hpp"
111 #include "gc/g1/g1HeapRegionRemSet.inline.hpp"
112 #endif // INCLUDE_G1GC
113 #if INCLUDE_PARALLELGC
114 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
115 #endif // INCLUDE_PARALLELGC
116 #if INCLUDE_SERIALGC
117 #include "gc/serial/serialHeap.hpp"
118 #endif // INCLUDE_SERIALGC
119 #if INCLUDE_ZGC
120 #include "gc/z/zAddress.inline.hpp"
121 #endif // INCLUDE_ZGC
122 #if INCLUDE_JVMCI
123 #include "jvmci/jvmciEnv.hpp"
124 #include "jvmci/jvmciRuntime.hpp"
125 #endif
126 #ifdef LINUX
127 #include "cgroupSubsystem_linux.hpp"
128 #include "osContainer_linux.hpp"
129 #include "os_linux.hpp"
130 #endif
131
132 #define CHECK_JNI_EXCEPTION_(env, value) \
133 do { \
134 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
135 THREAD->clear_pending_jni_exception_check(); \
136 if (HAS_PENDING_EXCEPTION) { \
137 return(value); \
138 } \
139 } while (0)
140
141 #define CHECK_JNI_EXCEPTION(env) \
142 do { \
143 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
144 THREAD->clear_pending_jni_exception_check(); \
145 if (HAS_PENDING_EXCEPTION) { \
146 return; \
147 } \
148 } while (0)
149
150 bool WhiteBox::_used = false;
151 volatile bool WhiteBox::compilation_locked = false;
152
153 class VM_WhiteBoxOperation : public VM_Operation {
154 public:
155 VM_WhiteBoxOperation() { }
156 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
157 bool allow_nested_vm_operations() const { return true; }
158 };
159
160
161 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
162 return (jlong)(void*)JNIHandles::resolve(obj);
163 WB_END
164
165 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
166 return heapOopSize;
167 WB_END
168
169 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
170 return (jint)os::vm_page_size();
171 WB_END
172
173 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
174 return os::vm_allocation_granularity();
175 WB_END
176
177 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
178 return os::large_page_size();
179 WB_END
180
181 WB_ENTRY(jstring, WB_PrintString(JNIEnv* env, jobject wb, jstring str, jint max_length))
182 ResourceMark rm(THREAD);
183 stringStream sb;
184 java_lang_String::print(JNIHandles::resolve(str), &sb, max_length);
185 oop result = java_lang_String::create_oop_from_str(sb.as_string(), THREAD);
186 return (jstring) JNIHandles::make_local(THREAD, result);
187 WB_END
188
189 WB_ENTRY(jint, WB_TakeLockAndHangInSafepoint(JNIEnv* env, jobject wb))
190 JavaThread* self = JavaThread::current();
191 // VMStatistic_lock is used to minimize interference with VM locking
192 MutexLocker mu(VMStatistic_lock);
193 VM_HangInSafepoint force_safepoint_stuck_op;
194 VMThread::execute(&force_safepoint_stuck_op);
195 ShouldNotReachHere();
196 return 0;
197 WB_END
198
199 class WBIsKlassAliveClosure : public LockedClassesDo {
200 Symbol* _name;
201 int _count;
202 public:
203 WBIsKlassAliveClosure(Symbol* name) : _name(name), _count(0) {}
204
205 void do_klass(Klass* k) {
206 Symbol* ksym = k->name();
207 if (ksym->fast_compare(_name) == 0) {
208 _count++;
209 } else if (k->is_instance_klass()) {
210 // Need special handling for hidden classes because the JVM
211 // appends "+<hex-address>" to hidden class names.
212 InstanceKlass *ik = InstanceKlass::cast(k);
213 if (ik->is_hidden()) {
214 ResourceMark rm;
215 char* k_name = ksym->as_C_string();
216 // Find the first '+' char and truncate the string at that point.
217 // NOTE: This will not work correctly if the original hidden class
218 // name contains a '+'.
219 char* plus_char = strchr(k_name, '+');
220 if (plus_char != nullptr) {
221 *plus_char = 0;
222 char* c_name = _name->as_C_string();
223 if (strcmp(c_name, k_name) == 0) {
224 _count++;
225 }
226 }
227 }
228 }
229 }
230
231 int count() const {
232 return _count;
233 }
234 };
235
236 WB_ENTRY(jint, WB_CountAliveClasses(JNIEnv* env, jobject target, jstring name))
237 oop h_name = JNIHandles::resolve(name);
238 if (h_name == nullptr) {
239 return 0;
240 }
241 Symbol* sym = java_lang_String::as_symbol(h_name);
242 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
243
244 WBIsKlassAliveClosure closure(sym);
245 ClassLoaderDataGraph::classes_do(&closure);
246
247 // Return the count of alive classes with this name.
248 return closure.count();
249 WB_END
250
251 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
252 oop h_name = JNIHandles::resolve(name);
253 if (h_name == nullptr) {
254 return 0;
255 }
256 Symbol* sym = java_lang_String::as_symbol(h_name);
257 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
258 return (jint)sym->refcount();
259 WB_END
260
261
262 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
263 #if INCLUDE_JVMTI
264 ResourceMark rm;
265 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
266 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
267 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
268 assert(err == JVMTI_ERROR_NONE, "must not fail");
269 #endif
270 }
271 WB_END
272
273 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
274 #if INCLUDE_JVMTI
275 ResourceMark rm;
276 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
277 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
278 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
279 assert(err == JVMTI_ERROR_NONE, "must not fail");
280 #endif
281 }
282 WB_END
283
284
285 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
286 return (jlong)Arguments::max_heap_for_compressed_oops();
287 }
288 WB_END
289
290 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
291 tty->print_cr("Minimum heap %zu Initial heap %zu "
292 "Maximum heap %zu Space alignment %zu Heap alignment %zu",
293 MinHeapSize,
294 InitialHeapSize,
295 MaxHeapSize,
296 SpaceAlignment,
297 HeapAlignment);
298 }
299 WB_END
300
301 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
302 size_t granularity = os::vm_allocation_granularity();
303 ReservedHeapSpace rhs = HeapReserver::reserve(100 * granularity, granularity, os::vm_page_size(), nullptr);
304
305 // Check if constraints are complied
306 if (!( UseCompressedOops && rhs.is_reserved() &&
307 CompressedOops::base() != nullptr &&
308 CompressedOops::use_implicit_null_checks() )) {
309 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
310 "\tUseCompressedOops is %d\n"
311 "\trhs.base() is " PTR_FORMAT "\n"
312 "\tCompressedOops::base() is " PTR_FORMAT "\n"
313 "\tCompressedOops::use_implicit_null_checks() is %d",
314 UseCompressedOops,
315 p2i(rhs.base()),
316 p2i(CompressedOops::base()),
317 CompressedOops::use_implicit_null_checks());
318 return;
319 }
320
321 VirtualSpace vs;
322 vs.initialize(rhs, 50 * granularity);
323
324 tty->print_cr("Reading from no access area... ");
325 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
326 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
327 WB_END
328
329 WB_ENTRY(void, WB_DecodeNKlassAndAccessKlass(JNIEnv* env, jobject o, jint nKlass))
330 assert(UseCompressedClassPointers, "Should only call for UseCompressedClassPointers");
331 const narrowKlass nk = (narrowKlass)nKlass;
332 const Klass* const k = CompressedKlassPointers::decode_not_null_without_asserts(nKlass);
333 printf("WB_DecodeNKlassAndAccessKlass: nk %u k " PTR_FORMAT "\n", nk, p2i(k));
334 printf("Will attempt to crash now...\n");
335 fflush(stdout); // flush now - we will crash below
336 // Access k by calling a virtual function - will result in loading the vtable from *k
337 k->print_on(tty);
338 WB_END
339
340 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
341 size_t magnitude, size_t iterations) {
342 size_t granularity = os::vm_allocation_granularity();
343 ReservedHeapSpace rhs = HeapReserver::reserve(reserved_space_size * granularity, granularity, os::vm_page_size(), nullptr);
344 if (!rhs.is_reserved()) {
345 tty->print_cr("Failed to initialize ReservedSpace. Can't proceed.");
346 return 3;
347 }
348
349 VirtualSpace vs;
350 if (!vs.initialize(rhs, 0)) {
351 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
352 return 3;
353 }
354
355 int seed = os::random();
356 tty->print_cr("Random seed is %d", seed);
357
358 for (size_t i = 0; i < iterations; i++) {
359
360 // Whether we will shrink or grow
361 bool shrink = os::random() % 2L == 0;
362
363 // Get random delta to resize virtual space
364 size_t delta = (size_t)os::random() % magnitude;
365
366 // If we are about to shrink virtual space below zero, then expand instead
367 if (shrink && vs.committed_size() < delta) {
368 shrink = false;
369 }
370
371 // Resizing by delta
372 if (shrink) {
373 vs.shrink_by(delta);
374 } else {
375 // If expanding fails expand_by will silently return false
376 vs.expand_by(delta, true);
377 }
378 }
379 return 0;
380 }
381
382 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
383 jlong reserved_space_size, jlong magnitude, jlong iterations))
384 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
385 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
386 iterations);
387 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
388 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
389 return 1;
390 }
391
392 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
393 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
394 if (sizeof(size_t) < sizeof(jlong)) {
395 jlong size_t_max_value = (jlong)SIZE_MAX;
396 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
397 || iterations > size_t_max_value) {
398 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
399 return 2;
400 }
401 }
402
403 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
404 (size_t) magnitude, (size_t) iterations);
405 WB_END
406
407 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
408 return GCConfig::is_gc_supported((CollectedHeap::Name)name);
409 WB_END
410
411 WB_ENTRY(jboolean, WB_HasLibgraal(JNIEnv* env, jobject o))
412 #if INCLUDE_JVMCI
413 return JVMCI::shared_library_exists();
414 #endif
415 return false;
416 WB_END
417
418 WB_ENTRY(jboolean, WB_IsGCSupportedByJVMCICompiler(JNIEnv* env, jobject o, jint name))
419 #if INCLUDE_JVMCI
420 if (EnableJVMCI) {
421 // Enter the JVMCI env that will be used by the CompileBroker.
422 JVMCIEnv jvmciEnv(thread, __FILE__, __LINE__);
423 return jvmciEnv.init_error() == JNI_OK && jvmciEnv.runtime()->is_gc_supported(&jvmciEnv, (CollectedHeap::Name)name);
424 }
425 #endif
426 return false;
427 WB_END
428
429 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
430 return GCConfig::is_gc_selected((CollectedHeap::Name)name);
431 WB_END
432
433 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
434 return GCConfig::is_gc_selected_ergonomically();
435 WB_END
436
437 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
438 oop p = JNIHandles::resolve(obj);
439 #if INCLUDE_G1GC
440 if (UseG1GC) {
441 G1CollectedHeap* g1h = G1CollectedHeap::heap();
442 const G1HeapRegion* hr = g1h->heap_region_containing(p);
443 return hr->is_old_or_humongous();
444 }
445 #endif
446 #if INCLUDE_PARALLELGC
447 if (UseParallelGC) {
448 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
449 return !psh->is_in_young(p);
450 }
451 #endif
452 #if INCLUDE_ZGC
453 if (UseZGC) {
454 return ZHeap::heap()->is_old(to_zaddress(p));
455 }
456 #endif
457 #if INCLUDE_SHENANDOAHGC
458 if (UseShenandoahGC) {
459 ShenandoahHeap* sh = ShenandoahHeap::heap();
460 return sh->mode()->is_generational() ? sh->is_in_old(p) : sh->is_in(p);
461 }
462 #endif
463 #if INCLUDE_SERIALGC
464 if (UseSerialGC) {
465 return !SerialHeap::heap()->is_in_young(p);
466 }
467 #endif
468 ShouldNotReachHere();
469 return false;
470 WB_END
471
472 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
473 oop p = JNIHandles::resolve(obj);
474 return p->size() * HeapWordSize;
475 WB_END
476
477 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
478 return (jlong)SpaceAlignment;
479 WB_END
480
481 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
482 return (jlong)HeapAlignment;
483 WB_END
484
485 WB_ENTRY(jboolean, WB_SupportsConcurrentGCBreakpoints(JNIEnv* env, jobject o))
486 return Universe::heap()->supports_concurrent_gc_breakpoints();
487 WB_END
488
489 WB_ENTRY(void, WB_ConcurrentGCAcquireControl(JNIEnv* env, jobject o))
490 ConcurrentGCBreakpoints::acquire_control();
491 WB_END
492
493 WB_ENTRY(void, WB_ConcurrentGCReleaseControl(JNIEnv* env, jobject o))
494 ConcurrentGCBreakpoints::release_control();
495 WB_END
496
497 WB_ENTRY(void, WB_ConcurrentGCRunToIdle(JNIEnv* env, jobject o))
498 ConcurrentGCBreakpoints::run_to_idle();
499 WB_END
500
501 WB_ENTRY(jboolean, WB_ConcurrentGCRunTo(JNIEnv* env, jobject o, jobject at))
502 Handle h_name(THREAD, JNIHandles::resolve(at));
503 ResourceMark rm;
504 const char* c_name = java_lang_String::as_utf8_string(h_name());
505 return ConcurrentGCBreakpoints::run_to(c_name);
506 WB_END
507
508 #if INCLUDE_G1GC
509
510 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
511 if (UseG1GC) {
512 G1CollectedHeap* g1h = G1CollectedHeap::heap();
513 oop result = JNIHandles::resolve(obj);
514 const G1HeapRegion* hr = g1h->heap_region_containing(result);
515 return hr->is_humongous();
516 }
517 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
518 WB_END
519
520 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
521 if (UseG1GC) {
522 G1CollectedHeap* g1h = G1CollectedHeap::heap();
523 const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
524 return hr->is_humongous();
525 }
526 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
527 WB_END
528
529 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
530 if (UseG1GC) {
531 G1CollectedHeap* g1h = G1CollectedHeap::heap();
532 const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
533 return hr->is_free();
534 }
535 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
536 WB_END
537
538 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
539 if (UseG1GC) {
540 G1CollectedHeap* g1h = G1CollectedHeap::heap();
541 size_t nr = g1h->max_num_regions();
542 return (jlong)nr;
543 }
544 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
545 WB_END
546
547 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
548 if (UseG1GC) {
549 G1CollectedHeap* g1h = G1CollectedHeap::heap();
550 size_t nr = g1h->num_free_regions();
551 return (jlong)nr;
552 }
553 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
554 WB_END
555
556 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
557 if (UseG1GC) {
558 G1CollectedHeap* g1h = G1CollectedHeap::heap();
559 return g1h->concurrent_mark()->cm_thread()->in_progress();
560 }
561 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
562 WB_END
563
564 WB_ENTRY(jint, WB_G1CompletedConcurrentMarkCycles(JNIEnv* env, jobject o))
565 if (UseG1GC) {
566 G1CollectedHeap* g1h = G1CollectedHeap::heap();
567 G1ConcurrentMark* cm = g1h->concurrent_mark();
568 return cm->completed_mark_cycles();
569 }
570 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1CompletedConcurrentMarkCycles: G1 GC is not enabled");
571 WB_END
572
573 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
574 if (UseG1GC) {
575 return (jint)G1HeapRegion::GrainBytes;
576 }
577 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
578 WB_END
579
580 WB_ENTRY(jboolean, WB_G1HasRegionsToUncommit(JNIEnv* env, jobject o))
581 if (UseG1GC) {
582 return G1CollectedHeap::heap()->has_uncommittable_regions();
583 }
584 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1HasRegionsToUncommit: G1 GC is not enabled");
585 WB_END
586
587 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
588 if (UseG1GC) {
589 ResourceMark rm(THREAD);
590 G1CollectedHeap* g1h = G1CollectedHeap::heap();
591 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
592 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
593 return JNIHandles::make_local(THREAD, h());
594 }
595 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
596 WB_END
597
598 WB_ENTRY(jint, WB_G1ActiveMemoryNodeCount(JNIEnv* env, jobject o))
599 if (UseG1GC) {
600 G1NUMA* numa = G1NUMA::numa();
601 return (jint)numa->num_active_nodes();
602 }
603 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1ActiveMemoryNodeCount: G1 GC is not enabled");
604 WB_END
605
606 WB_ENTRY(jintArray, WB_G1MemoryNodeIds(JNIEnv* env, jobject o))
607 if (UseG1GC) {
608 G1NUMA* numa = G1NUMA::numa();
609 int num_node_ids = checked_cast<int>(numa->num_active_nodes());
610 const uint* node_ids = numa->node_ids();
611
612 typeArrayOop result = oopFactory::new_intArray(num_node_ids, CHECK_NULL);
613 for (int i = 0; i < num_node_ids; i++) {
614 result->int_at_put(i, checked_cast<jint>(node_ids[i]));
615 }
616 return (jintArray) JNIHandles::make_local(THREAD, result);
617 }
618 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1MemoryNodeIds: G1 GC is not enabled");
619 WB_END
620
621 class OldRegionsLivenessClosure: public G1HeapRegionClosure {
622
623 private:
624 const int _liveness;
625 size_t _total_count;
626 size_t _total_memory;
627 size_t _total_memory_to_free;
628
629 public:
630 OldRegionsLivenessClosure(int liveness) :
631 _liveness(liveness),
632 _total_count(0),
633 _total_memory(0),
634 _total_memory_to_free(0) { }
635
636 size_t total_count() { return _total_count; }
637 size_t total_memory() { return _total_memory; }
638 size_t total_memory_to_free() { return _total_memory_to_free; }
639
640 bool do_heap_region(G1HeapRegion* r) {
641 if (r->is_old()) {
642 size_t live = r->live_bytes();
643 size_t size = r->used();
644 size_t reg_size = G1HeapRegion::GrainBytes;
645 if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
646 _total_memory += size;
647 ++_total_count;
648 if (size == reg_size) {
649 // We don't include non-full regions since they are unlikely included in mixed gc
650 // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
651 _total_memory_to_free += size - live;
652 }
653 }
654 }
655 return false;
656 }
657 };
658
659
660 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
661 if (!UseG1GC) {
662 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
663 }
664 if (liveness < 0) {
665 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
666 }
667
668 G1CollectedHeap* g1h = G1CollectedHeap::heap();
669 OldRegionsLivenessClosure rli(liveness);
670 g1h->heap_region_iterate(&rli);
671
672 typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
673 result->long_at_put(0, rli.total_count());
674 result->long_at_put(1, rli.total_memory());
675 result->long_at_put(2, rli.total_memory_to_free());
676 return (jlongArray) JNIHandles::make_local(THREAD, result);
677 WB_END
678
679 #endif // INCLUDE_G1GC
680
681 // Alloc memory using the test memory tag so that we can use that to see if
682 // NMT picks it up correctly
683 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
684 jlong addr = 0;
685 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
686 return addr;
687 WB_END
688
689 // Alloc memory with pseudo call stack. The test can create pseudo malloc
690 // allocation site to stress the malloc tracking.
691 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
692 address pc = (address)(size_t)pseudo_stack;
693 NativeCallStack stack(&pc, 1);
694 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
695 WB_END
696
697 // Alloc memory with pseudo call stack and specific memory tag.
698 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint mem_tag))
699 address pc = (address)(size_t)pseudo_stack;
700 NativeCallStack stack(&pc, 1);
701 return (jlong)(uintptr_t)os::malloc(size, (MemTag)mem_tag, stack);
702 WB_END
703
704 // Free the memory allocated by NMTAllocTest
705 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
706 os::free((void*)(uintptr_t)mem);
707 WB_END
708
709 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
710 return (jlong)(uintptr_t)os::reserve_memory(size, mtTest);
711 WB_END
712
713 WB_ENTRY(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
714 return (jlong)(uintptr_t)os::attempt_reserve_memory_at((char*)(uintptr_t)addr, (size_t)size, mtTest);
715 WB_END
716
717 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
718 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
719 WB_END
720
721 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
722 os::uncommit_memory((char *)(uintptr_t)addr, size);
723 WB_END
724
725 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
726 os::release_memory((char *)(uintptr_t)addr, size);
727 WB_END
728
729 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
730 int hash_size = MallocSiteTable::hash_buckets();
731 assert(hash_size > 0, "NMT hash_size should be > 0");
732 return (jint)hash_size;
733 WB_END
734
735 WB_ENTRY(jlong, WB_NMTNewArena(JNIEnv* env, jobject o, jlong init_size))
736 Arena* arena = new (mtTest) Arena(mtTest, Arena::Tag::tag_other, size_t(init_size));
737 return (jlong)arena;
738 WB_END
739
740 WB_ENTRY(void, WB_NMTFreeArena(JNIEnv* env, jobject o, jlong arena))
741 Arena* a = (Arena*)arena;
742 delete a;
743 WB_END
744
745 WB_ENTRY(void, WB_NMTArenaMalloc(JNIEnv* env, jobject o, jlong arena, jlong size))
746 Arena* a = (Arena*)arena;
747 a->Amalloc(size_t(size));
748 WB_END
749
750 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
751 assert(method != nullptr, "method should not be null");
752 ThreadToNativeFromVM ttn(thread);
753 return env->FromReflectedMethod(method);
754 }
755
756 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
757 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
758 private:
759 int _result;
760 const bool _make_not_entrant;
761 public:
762 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
763 _result(0), _make_not_entrant(make_not_entrant) { }
764 int result() const { return _result; }
765
766 void doit() {
767 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
768 if (t->has_last_Java_frame()) {
769 for (StackFrameStream fst(t, false /* update */, true /* process_frames */); !fst.is_done(); fst.next()) {
770 frame* f = fst.current();
771 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
772 Deoptimization::deoptimize(t, *f);
773 if (_make_not_entrant) {
774 nmethod* nm = CodeCache::find_nmethod(f->pc());
775 assert(nm != nullptr, "did not find nmethod");
776 nm->make_not_entrant(nmethod::InvalidationReason::WHITEBOX_DEOPTIMIZATION);
777 }
778 ++_result;
779 }
780 }
781 }
782 }
783 }
784 };
785
786 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
787 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
788 VMThread::execute(&op);
789 return op.result();
790 WB_END
791
792 WB_ENTRY(jboolean, WB_IsFrameDeoptimized(JNIEnv* env, jobject o, jint depth))
793 bool result = false;
794 if (thread->has_last_Java_frame()) {
795 ResourceMark rm(THREAD);
796 RegisterMap reg_map(thread,
797 RegisterMap::UpdateMap::include,
798 RegisterMap::ProcessFrames::include,
799 RegisterMap::WalkContinuation::skip);
800 javaVFrame *jvf = thread->last_java_vframe(®_map);
801 for (jint d = 0; d < depth && jvf != nullptr; d++) {
802 jvf = jvf->java_sender();
803 }
804 result = jvf != nullptr && jvf->fr().is_deoptimized_frame();
805 }
806 return result;
807 WB_END
808
809 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
810 DeoptimizationScope deopt_scope;
811 CodeCache::mark_all_nmethods_for_deoptimization(&deopt_scope);
812 deopt_scope.deoptimize_marked();
813 WB_END
814
815 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
816 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
817 int result = 0;
818 CHECK_JNI_EXCEPTION_(env, result);
819
820 DeoptimizationScope deopt_scope;
821 {
822 MutexLocker mu(Compile_lock);
823 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
824 if (is_osr) {
825 result += mh->method_holder()->mark_osr_nmethods(&deopt_scope, mh());
826 } else {
827 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
828 if (mh->code() != nullptr) {
829 deopt_scope.mark(mh->code());
830 ++result;
831 }
832 }
833 CodeCache::mark_for_deoptimization(&deopt_scope, mh());
834 }
835
836 deopt_scope.deoptimize_marked();
837
838 return result;
839 WB_END
840
841 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
842 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
843 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
844 MutexLocker mu(Compile_lock);
845 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
846 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
847 if (code == nullptr) {
848 return JNI_FALSE;
849 }
850 return !code->is_marked_for_deoptimization();
851 WB_END
852
853 static bool is_excluded_for_compiler(AbstractCompiler* comp, methodHandle& mh) {
854 if (comp == nullptr) {
855 return true;
856 }
857 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
858 bool exclude = directive->ExcludeOption;
859 DirectivesStack::release(directive);
860 return exclude;
861 }
862
863 static bool can_be_compiled_at_level(methodHandle& mh, jboolean is_osr, int level) {
864 if (is_osr) {
865 return CompilationPolicy::can_be_osr_compiled(mh, level);
866 } else {
867 return CompilationPolicy::can_be_compiled(mh, level);
868 }
869 }
870
871 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
872 if (method == nullptr || comp_level > CompilationPolicy::highest_compile_level()) {
873 return false;
874 }
875 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
876 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
877 MutexLocker mu(Compile_lock);
878 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
879
880 // The ExcludeOption directive is evaluated lazily upon compilation attempt. If a method was not tried to be compiled by
881 // a compiler, yet, the method object is not set to be not compilable by that compiler. Thus, evaluate the compiler directive
882 // to exclude a compilation of 'method'.
883 if (comp_level == CompLevel_any) {
884 // Both compilers could have ExcludeOption set. Check all combinations.
885 bool excluded_c1 = is_excluded_for_compiler(CompileBroker::compiler1(), mh);
886 bool excluded_c2 = is_excluded_for_compiler(CompileBroker::compiler2(), mh);
887 if (excluded_c1 && excluded_c2) {
888 // Compilation of 'method' excluded by both compilers.
889 return false;
890 }
891
892 if (excluded_c1) {
893 // C1 only has ExcludeOption set: Check if compilable with C2.
894 return can_be_compiled_at_level(mh, is_osr, CompLevel_full_optimization);
895 } else if (excluded_c2) {
896 // C2 only has ExcludeOption set: Check if compilable with C1.
897 return can_be_compiled_at_level(mh, is_osr, CompLevel_simple);
898 }
899 } else if (comp_level > CompLevel_none && is_excluded_for_compiler(CompileBroker::compiler((int)comp_level), mh)) {
900 // Compilation of 'method' excluded by compiler used for 'comp_level'.
901 return false;
902 }
903
904 return can_be_compiled_at_level(mh, is_osr, (int)comp_level);
905 WB_END
906
907 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
908 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
909 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
910 MutexLocker mu(Compile_lock);
911 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
912 return mh->queued_for_compilation();
913 WB_END
914
915 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
916 if (compLevel < CompLevel_none || compLevel > CompilationPolicy::highest_compile_level()) {
917 return false; // Intrinsic is not available on a non-existent compilation level.
918 }
919 AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
920 if (comp == nullptr) {
921 // Could have compLevel == 0, or !TieredCompilation and incompatible values of TieredStopAtLevel and compLevel.
922 tty->print_cr("WB error: no compiler for requested compilation level %d", compLevel);
923 return false;
924 }
925
926 jmethodID method_id, compilation_context_id;
927 method_id = reflected_method_to_jmid(thread, env, method);
928 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
929 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
930
931 DirectiveSet* directive;
932 if (compilation_context != nullptr) {
933 compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
934 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
935 methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
936 directive = DirectivesStack::getMatchingDirective(cch, comp);
937 } else {
938 // Calling with null matches default directive
939 directive = DirectivesStack::getDefaultDirective(comp);
940 }
941 bool result = comp->is_intrinsic_available(mh, directive);
942 DirectivesStack::release(directive);
943 return result;
944 WB_END
945
946 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
947 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
948 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
949 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
950 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
951 return (code != nullptr ? code->comp_level() : CompLevel_none);
952 WB_END
953
954 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
955 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
956 CHECK_JNI_EXCEPTION(env);
957 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
958 if (is_osr) {
959 mh->set_not_osr_compilable("WhiteBox", comp_level);
960 } else {
961 mh->set_not_compilable("WhiteBox", comp_level);
962 }
963 WB_END
964
965 WB_ENTRY(jint, WB_GetMethodDecompileCount(JNIEnv* env, jobject o, jobject method))
966 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
967 CHECK_JNI_EXCEPTION_(env, 0);
968 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
969 uint cnt = 0;
970 MethodData* mdo = mh->method_data();
971 if (mdo != nullptr) {
972 cnt = mdo->decompile_count();
973 }
974 return cnt;
975 WB_END
976
977 // Get the trap count of a method for a specific reason. If the trap count for
978 // that reason did overflow, this includes the overflow trap count of the method.
979 // If 'reason' is null, the sum of the traps for all reasons will be returned.
980 // This number includes the overflow trap count if the trap count for any reason
981 // did overflow.
982 WB_ENTRY(jint, WB_GetMethodTrapCount(JNIEnv* env, jobject o, jobject method, jstring reason_obj))
983 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
984 CHECK_JNI_EXCEPTION_(env, 0);
985 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
986 uint cnt = 0;
987 MethodData* mdo = mh->method_data();
988 if (mdo != nullptr) {
989 ResourceMark rm(THREAD);
990 char* reason_str = (reason_obj == nullptr) ?
991 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
992 bool overflow = false;
993 for (uint reason = 0; reason < mdo->trap_reason_limit(); reason++) {
994 if (reason_str != nullptr && !strcmp(reason_str, Deoptimization::trap_reason_name(reason))) {
995 cnt = mdo->trap_count(reason);
996 // Count in the overflow trap count on overflow
997 if (cnt == (uint)-1) {
998 cnt = mdo->trap_count_limit() + mdo->overflow_trap_count();
999 }
1000 break;
1001 } else if (reason_str == nullptr) {
1002 uint c = mdo->trap_count(reason);
1003 if (c == (uint)-1) {
1004 c = mdo->trap_count_limit();
1005 if (!overflow) {
1006 // Count overflow trap count just once
1007 overflow = true;
1008 c += mdo->overflow_trap_count();
1009 }
1010 }
1011 cnt += c;
1012 }
1013 }
1014 }
1015 return cnt;
1016 WB_END
1017
1018 WB_ENTRY(jint, WB_GetDeoptCount(JNIEnv* env, jobject o, jstring reason_obj, jstring action_obj))
1019 if (reason_obj == nullptr && action_obj == nullptr) {
1020 return Deoptimization::total_deoptimization_count();
1021 }
1022 ResourceMark rm(THREAD);
1023 const char *reason_str = (reason_obj == nullptr) ?
1024 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1025 const char *action_str = (action_obj == nullptr) ?
1026 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(action_obj));
1027
1028 return Deoptimization::deoptimization_count(reason_str, action_str);
1029 WB_END
1030
1031 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
1032 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1033 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
1034 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1035 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
1036 return (code != nullptr && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
1037 WB_END
1038
1039 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1040 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1041 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1042 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1043 bool result = mh->dont_inline();
1044 mh->set_dont_inline(value == JNI_TRUE);
1045 return result;
1046 WB_END
1047
1048 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
1049 if (comp_level == CompLevel_any) {
1050 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
1051 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
1052 } else {
1053 return CompileBroker::queue_size(comp_level);
1054 }
1055 WB_END
1056
1057 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1058 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1059 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1060 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1061 bool result = mh->force_inline();
1062 mh->set_force_inline(value == JNI_TRUE);
1063 return result;
1064 WB_END
1065
1066 #ifdef LINUX
1067 bool WhiteBox::validate_cgroup(bool cgroups_v2_enabled,
1068 const char* controllers_file,
1069 const char* proc_self_cgroup,
1070 const char* proc_self_mountinfo,
1071 u1* cg_flags) {
1072 CgroupInfo cg_infos[CG_INFO_LENGTH];
1073 return CgroupSubsystemFactory::determine_type(cg_infos, cgroups_v2_enabled, controllers_file,
1074 proc_self_cgroup,
1075 proc_self_mountinfo, cg_flags);
1076 }
1077 #endif
1078
1079 bool WhiteBox::is_asan_enabled() {
1080 #ifdef ADDRESS_SANITIZER
1081 return true;
1082 #else
1083 return false;
1084 #endif
1085 }
1086
1087 bool WhiteBox::is_ubsan_enabled() {
1088 #ifdef UNDEFINED_BEHAVIOR_SANITIZER
1089 return true;
1090 #else
1091 return false;
1092 #endif
1093 }
1094
1095 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, JavaThread* THREAD) {
1096 // Screen for unavailable/bad comp level or null method
1097 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1098 if (method == nullptr) {
1099 tty->print_cr("WB error: request to compile null method");
1100 return false;
1101 }
1102 if (method->is_abstract()) {
1103 tty->print_cr("WB error: request to compile abstract method");
1104 return false;
1105 }
1106 if (comp_level > CompilationPolicy::highest_compile_level()) {
1107 tty->print_cr("WB error: invalid compilation level %d", comp_level);
1108 return false;
1109 }
1110 if (comp == nullptr) {
1111 tty->print_cr("WB error: no compiler for requested compilation level %d", comp_level);
1112 return false;
1113 }
1114
1115 // Check if compilation is blocking
1116 methodHandle mh(THREAD, method);
1117 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
1118 bool is_blocking = !directive->BackgroundCompilationOption;
1119 DirectivesStack::release(directive);
1120
1121 // Compile method and check result
1122 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh->invocation_count(), CompileTask::Reason_Whitebox, CHECK_false);
1123 MutexLocker mu(THREAD, Compile_lock);
1124 bool is_queued = mh->queued_for_compilation();
1125 if ((!is_blocking && is_queued) || nm != nullptr) {
1126 return true;
1127 }
1128 // Check code again because compilation may be finished before Compile_lock is acquired.
1129 if (bci == InvocationEntryBci) {
1130 nmethod* code = mh->code();
1131 if (code != nullptr) {
1132 return true;
1133 }
1134 } else if (mh->lookup_osr_nmethod_for(bci, comp_level, false) != nullptr) {
1135 return true;
1136 }
1137 tty->print("WB error: failed to %s compile at level %d method ", is_blocking ? "blocking" : "", comp_level);
1138 mh->print_short_name(tty);
1139 tty->cr();
1140 if (is_blocking && is_queued) {
1141 tty->print_cr("WB error: blocking compilation is still in queue!");
1142 }
1143 return false;
1144 }
1145
1146 size_t WhiteBox::get_in_use_monitor_count() {
1147 return ObjectSynchronizer::_in_use_list.count();
1148 }
1149
1150 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1151 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1152 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1153 return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1154 WB_END
1155
1156 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1157 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1158 Method* clinit = ik->class_initializer();
1159 if (clinit == nullptr || clinit->method_holder()->is_not_initialized()) {
1160 return false;
1161 }
1162 return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1163 WB_END
1164
1165 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1166 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1167 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1168
1169 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1170 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
1171 bool result = directive->PrintAssemblyOption;
1172 DirectivesStack::release(directive);
1173
1174 return result;
1175 WB_END
1176
1177 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1178 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1179 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1180
1181 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1182
1183 ResourceMark rm(THREAD);
1184 const char* error_msg = nullptr;
1185 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1186 InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1187
1188 if (m == nullptr) {
1189 assert(error_msg != nullptr, "Always have an error message");
1190 tty->print_cr("Got error: %s", error_msg);
1191 return -1; // Pattern failed
1192 }
1193
1194 // Pattern works - now check if it matches
1195 int result;
1196 if (m->match(mh, InlineMatcher::force_inline)) {
1197 result = 2; // Force inline match
1198 } else if (m->match(mh, InlineMatcher::dont_inline)) {
1199 result = 1; // Dont inline match
1200 } else {
1201 result = 0; // No match
1202 }
1203 delete m;
1204 return result;
1205 WB_END
1206
1207 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1208 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1209 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1210
1211 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1212
1213 ResourceMark rm;
1214 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1215
1216 const char* error_msg = nullptr;
1217
1218 BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg, false);
1219 if (m == nullptr) {
1220 assert(error_msg != nullptr, "Must have error_msg");
1221 tty->print_cr("Got error: %s", error_msg);
1222 return -1;
1223 }
1224
1225 // Pattern works - now check if it matches
1226 int result = m->matches(mh);
1227 delete m;
1228 assert(result == 0 || result == 1, "Result out of range");
1229 return result;
1230 WB_END
1231
1232 WB_ENTRY(void, WB_MarkMethodProfiled(JNIEnv* env, jobject o, jobject method))
1233 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1234 CHECK_JNI_EXCEPTION(env);
1235 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1236
1237 MethodData* mdo = mh->method_data();
1238 if (mdo == nullptr) {
1239 Method::build_profiling_method_data(mh, CHECK_AND_CLEAR);
1240 mdo = mh->method_data();
1241 }
1242 mdo->init();
1243 InvocationCounter* icnt = mdo->invocation_counter();
1244 InvocationCounter* bcnt = mdo->backedge_counter();
1245 // set i-counter according to CompilationPolicy::is_method_profiled
1246 icnt->set(Tier4MinInvocationThreshold);
1247 bcnt->set(Tier4CompileThreshold);
1248 WB_END
1249
1250 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1251 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1252 CHECK_JNI_EXCEPTION(env);
1253 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1254 MutexLocker mu(THREAD, Compile_lock);
1255 MethodData* mdo = mh->method_data();
1256 MethodCounters* mcs = mh->method_counters();
1257
1258 if (mdo != nullptr) {
1259 mdo->init();
1260 ResourceMark rm(THREAD);
1261 int arg_count = mdo->method()->size_of_parameters();
1262 for (int i = 0; i < arg_count; i++) {
1263 mdo->set_arg_modified(i, 0);
1264 }
1265 mdo->clean_method_data(/*always_clean*/true);
1266 }
1267
1268 mh->clear_is_not_c1_compilable();
1269 mh->clear_is_not_c2_compilable();
1270 mh->clear_is_not_c2_osr_compilable();
1271 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1272 if (mcs != nullptr) {
1273 mcs->clear_counters();
1274 }
1275 WB_END
1276
1277 template <typename T, int type_enum>
1278 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1279 if (name == nullptr) {
1280 return false;
1281 }
1282 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1283 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1284 CHECK_JNI_EXCEPTION_(env, false);
1285 const JVMFlag* flag = JVMFlag::find_declared_flag(flag_name);
1286 JVMFlag::Error result = JVMFlagAccess::get<T, type_enum>(flag, value);
1287 env->ReleaseStringUTFChars(name, flag_name);
1288 return (result == JVMFlag::SUCCESS);
1289 }
1290
1291 template <typename T, int type_enum>
1292 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1293 if (name == nullptr) {
1294 return false;
1295 }
1296 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1297 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1298 CHECK_JNI_EXCEPTION_(env, false);
1299 JVMFlag* flag = JVMFlag::find_flag(flag_name);
1300 JVMFlag::Error result = JVMFlagAccess::set<T, type_enum>(flag, value, JVMFlagOrigin::INTERNAL);
1301 env->ReleaseStringUTFChars(name, flag_name);
1302 return (result == JVMFlag::SUCCESS);
1303 }
1304
1305 template <typename T>
1306 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1307 ResourceMark rm(thread);
1308 jclass clazz = env->FindClass(name->as_C_string());
1309 CHECK_JNI_EXCEPTION_(env, nullptr);
1310 jmethodID methodID = env->GetStaticMethodID(clazz,
1311 vmSymbols::valueOf_name()->as_C_string(),
1312 sig->as_C_string());
1313 CHECK_JNI_EXCEPTION_(env, nullptr);
1314 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1315 CHECK_JNI_EXCEPTION_(env, nullptr);
1316 return result;
1317 }
1318
1319 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1320 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1321 }
1322 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1323 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1324 }
1325 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1326 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1327 }
1328 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1329 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1330 }*/
1331 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1332 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1333 }
1334
1335 static const JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1336 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1337 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1338 CHECK_JNI_EXCEPTION_(env, nullptr);
1339 const JVMFlag* result = JVMFlag::find_declared_flag(flag_name);
1340 env->ReleaseStringUTFChars(name, flag_name);
1341 return result;
1342 }
1343
1344 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1345 const JVMFlag* flag = getVMFlag(thread, env, name);
1346 return (flag != nullptr) && flag->is_constant_in_binary();
1347 WB_END
1348
1349 WB_ENTRY(jboolean, WB_IsDefaultVMFlag(JNIEnv* env, jobject o, jstring name))
1350 const JVMFlag* flag = getVMFlag(thread, env, name);
1351 return (flag != nullptr) && flag->is_default();
1352 WB_END
1353
1354 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1355 const JVMFlag* flag = getVMFlag(thread, env, name);
1356 return (flag != nullptr) && !(flag->is_unlocked() || flag->is_unlocker());
1357 WB_END
1358
1359 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1360 bool result;
1361 if (GetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result)) {
1362 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1363 return booleanBox(thread, env, result);
1364 }
1365 return nullptr;
1366 WB_END
1367
1368 template <typename T, int type_enum>
1369 jobject GetVMFlag_longBox(JNIEnv* env, JavaThread* thread, jstring name) {
1370 T result;
1371 if (GetVMFlag <T, type_enum> (thread, env, name, &result)) {
1372 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1373 return longBox(thread, env, result);
1374 }
1375 return nullptr;
1376 }
1377
1378 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1379 return GetVMFlag_longBox<JVM_FLAG_TYPE(int)>(env, thread, name);
1380 WB_END
1381
1382 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1383 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint)>(env, thread, name);
1384 WB_END
1385
1386 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1387 return GetVMFlag_longBox<JVM_FLAG_TYPE(intx)>(env, thread, name);
1388 WB_END
1389
1390 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1391 return GetVMFlag_longBox<JVM_FLAG_TYPE(uintx)>(env, thread, name);
1392 WB_END
1393
1394 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1395 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint64_t)>(env, thread, name);
1396 WB_END
1397
1398 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1399 return GetVMFlag_longBox<JVM_FLAG_TYPE(size_t)>(env, thread, name);
1400 WB_END
1401
1402 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1403 double result;
1404 if (GetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result)) {
1405 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1406 return doubleBox(thread, env, result);
1407 }
1408 return nullptr;
1409 WB_END
1410
1411 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1412 ccstr ccstrResult;
1413 if (GetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &ccstrResult)) {
1414 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1415 jstring result = env->NewStringUTF(ccstrResult);
1416 CHECK_JNI_EXCEPTION_(env, nullptr);
1417 return result;
1418 }
1419 return nullptr;
1420 WB_END
1421
1422 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1423 bool result = value == JNI_TRUE ? true : false;
1424 SetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result);
1425 WB_END
1426
1427 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1428 int result = checked_cast<int>(value);
1429 SetVMFlag <JVM_FLAG_TYPE(int)> (thread, env, name, &result);
1430 WB_END
1431
1432 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1433 uint result = checked_cast<uint>(value);
1434 SetVMFlag <JVM_FLAG_TYPE(uint)> (thread, env, name, &result);
1435 WB_END
1436
1437 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1438 intx result = value;
1439 SetVMFlag <JVM_FLAG_TYPE(intx)> (thread, env, name, &result);
1440 WB_END
1441
1442 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1443 uintx result = value;
1444 SetVMFlag <JVM_FLAG_TYPE(uintx)> (thread, env, name, &result);
1445 WB_END
1446
1447 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1448 uint64_t result = value;
1449 SetVMFlag <JVM_FLAG_TYPE(uint64_t)> (thread, env, name, &result);
1450 WB_END
1451
1452 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1453 size_t result = value;
1454 SetVMFlag <JVM_FLAG_TYPE(size_t)> (thread, env, name, &result);
1455 WB_END
1456
1457 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1458 double result = value;
1459 SetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result);
1460 WB_END
1461
1462 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1463 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1464 const char* ccstrValue;
1465 if (value == nullptr) {
1466 ccstrValue = nullptr;
1467 }
1468 else {
1469 ccstrValue = env->GetStringUTFChars(value, nullptr);
1470 CHECK_JNI_EXCEPTION(env);
1471 }
1472 {
1473 ccstr param = ccstrValue;
1474 ThreadInVMfromNative ttvfn(thread); // back to VM
1475 if (SetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, ¶m)) {
1476 assert(param == nullptr, "old value is freed automatically and not returned");
1477 }
1478 }
1479 if (value != nullptr) {
1480 env->ReleaseStringUTFChars(value, ccstrValue);
1481 }
1482 WB_END
1483
1484 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1485 WhiteBox::compilation_locked = true;
1486 WB_END
1487
1488 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1489 MonitorLocker mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1490 WhiteBox::compilation_locked = false;
1491 mo.notify_all();
1492 WB_END
1493
1494 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1495 ResourceMark rm(THREAD);
1496 int len;
1497 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1498 return (StringTable::lookup(name, len) != nullptr);
1499 WB_END
1500
1501 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1502 Universe::heap()->soft_ref_policy()->set_should_clear_all_soft_refs(true);
1503 Universe::heap()->collect(GCCause::_wb_full_gc);
1504 #if INCLUDE_G1GC || INCLUDE_SERIALGC
1505 if (UseG1GC || UseSerialGC) {
1506 // Needs to be cleared explicitly for G1 and Serial GC.
1507 Universe::heap()->soft_ref_policy()->set_should_clear_all_soft_refs(false);
1508 }
1509 #endif // INCLUDE_G1GC || INCLUDE_SERIALGC
1510 WB_END
1511
1512 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1513 Universe::heap()->collect(GCCause::_wb_young_gc);
1514 WB_END
1515
1516 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1517 // static+volatile in order to force the read to happen
1518 // (not be eliminated by the compiler)
1519 static char c;
1520 static volatile char* p;
1521
1522 p = os::reserve_memory(os::vm_allocation_granularity(), mtTest);
1523 if (p == nullptr) {
1524 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1525 }
1526
1527 c = *p;
1528 WB_END
1529
1530 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1531 const char* features = VM_Version::cpu_info_string();
1532 ThreadToNativeFromVM ttn(thread);
1533 jstring features_string = env->NewStringUTF(features);
1534
1535 CHECK_JNI_EXCEPTION_(env, nullptr);
1536
1537 return features_string;
1538 WB_END
1539
1540 CodeBlobType WhiteBox::get_blob_type(const CodeBlob* code) {
1541 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1542 return CodeCache::get_code_heap(code)->code_blob_type();
1543 }
1544
1545 CodeHeap* WhiteBox::get_code_heap(CodeBlobType blob_type) {
1546 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1547 return CodeCache::get_code_heap(blob_type);
1548 }
1549
1550 struct CodeBlobStub {
1551 CodeBlobStub(const CodeBlob* blob) :
1552 name(os::strdup(blob->name())),
1553 size(blob->size()),
1554 blob_type(static_cast<jint>(WhiteBox::get_blob_type(blob))),
1555 address((jlong) blob) { }
1556 ~CodeBlobStub() { os::free((void*) name); }
1557 const char* const name;
1558 const jint size;
1559 const jint blob_type;
1560 const jlong address;
1561 };
1562
1563 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1564 ResourceMark rm;
1565 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1566 CHECK_JNI_EXCEPTION_(env, nullptr);
1567 jobjectArray result = env->NewObjectArray(4, clazz, nullptr);
1568
1569 jstring name = env->NewStringUTF(cb->name);
1570 CHECK_JNI_EXCEPTION_(env, nullptr);
1571 env->SetObjectArrayElement(result, 0, name);
1572
1573 jobject obj = integerBox(thread, env, cb->size);
1574 CHECK_JNI_EXCEPTION_(env, nullptr);
1575 env->SetObjectArrayElement(result, 1, obj);
1576
1577 obj = integerBox(thread, env, cb->blob_type);
1578 CHECK_JNI_EXCEPTION_(env, nullptr);
1579 env->SetObjectArrayElement(result, 2, obj);
1580
1581 obj = longBox(thread, env, cb->address);
1582 CHECK_JNI_EXCEPTION_(env, nullptr);
1583 env->SetObjectArrayElement(result, 3, obj);
1584
1585 return result;
1586 }
1587
1588 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1589 ResourceMark rm(THREAD);
1590 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1591 CHECK_JNI_EXCEPTION_(env, nullptr);
1592 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1593 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1594 jobjectArray result = nullptr;
1595 if (code == nullptr) {
1596 return result;
1597 }
1598 int comp_level = code->comp_level();
1599 int insts_size = code->insts_size();
1600
1601 ThreadToNativeFromVM ttn(thread);
1602 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1603 CHECK_JNI_EXCEPTION_(env, nullptr);
1604 result = env->NewObjectArray(5, clazz, nullptr);
1605 if (result == nullptr) {
1606 return result;
1607 }
1608
1609 CodeBlobStub stub(code);
1610 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1611 CHECK_JNI_EXCEPTION_(env, nullptr);
1612 env->SetObjectArrayElement(result, 0, codeBlob);
1613
1614 jobject level = integerBox(thread, env, comp_level);
1615 CHECK_JNI_EXCEPTION_(env, nullptr);
1616 env->SetObjectArrayElement(result, 1, level);
1617
1618 jbyteArray insts = env->NewByteArray(insts_size);
1619 CHECK_JNI_EXCEPTION_(env, nullptr);
1620 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1621 env->SetObjectArrayElement(result, 2, insts);
1622
1623 jobject id = integerBox(thread, env, code->compile_id());
1624 CHECK_JNI_EXCEPTION_(env, nullptr);
1625 env->SetObjectArrayElement(result, 3, id);
1626
1627 jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1628 CHECK_JNI_EXCEPTION_(env, nullptr);
1629 env->SetObjectArrayElement(result, 4, entry_point);
1630
1631 return result;
1632 WB_END
1633
1634 CodeBlob* WhiteBox::allocate_code_blob(int size, CodeBlobType blob_type) {
1635 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1636 BufferBlob* blob;
1637 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1638 if (full_size < size) {
1639 full_size += align_up(size - full_size, oopSize);
1640 }
1641 {
1642 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1643 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1644 if (blob != nullptr) {
1645 ::new (blob) BufferBlob("WB::DummyBlob", CodeBlobKind::Buffer, full_size);
1646 }
1647 }
1648 // Track memory usage statistic after releasing CodeCache_lock
1649 MemoryService::track_code_cache_memory_usage();
1650 return blob;
1651 }
1652
1653 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1654 if (size < 0) {
1655 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1656 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1657 }
1658 return (jlong) WhiteBox::allocate_code_blob(size, static_cast<CodeBlobType>(blob_type));
1659 WB_END
1660
1661 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1662 if (addr == 0) {
1663 return;
1664 }
1665 BufferBlob::free((BufferBlob*) addr);
1666 WB_END
1667
1668 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1669 ResourceMark rm;
1670 GrowableArray<CodeBlobStub*> blobs;
1671 {
1672 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1673 CodeHeap* heap = WhiteBox::get_code_heap(static_cast<CodeBlobType>(blob_type));
1674 if (heap == nullptr) {
1675 return nullptr;
1676 }
1677 for (CodeBlob* cb = (CodeBlob*) heap->first();
1678 cb != nullptr; cb = (CodeBlob*) heap->next(cb)) {
1679 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1680 new (stub) CodeBlobStub(cb);
1681 blobs.append(stub);
1682 }
1683 }
1684 ThreadToNativeFromVM ttn(thread);
1685 jobjectArray result = nullptr;
1686 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1687 CHECK_JNI_EXCEPTION_(env, nullptr);
1688 result = env->NewObjectArray(blobs.length(), clazz, nullptr);
1689 CHECK_JNI_EXCEPTION_(env, nullptr);
1690 if (result == nullptr) {
1691 return result;
1692 }
1693 int i = 0;
1694 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1695 it != blobs.end(); ++it) {
1696 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1697 CHECK_JNI_EXCEPTION_(env, nullptr);
1698 env->SetObjectArrayElement(result, i, obj);
1699 CHECK_JNI_EXCEPTION_(env, nullptr);
1700 ++i;
1701 }
1702 return result;
1703 WB_END
1704
1705 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1706 return CompileBroker::get_compilation_activity_mode();
1707 WB_END
1708
1709 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1710 if (addr == 0) {
1711 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1712 "WB_GetCodeBlob: addr is null");
1713 }
1714 ThreadToNativeFromVM ttn(thread);
1715 CodeBlobStub stub((CodeBlob*) addr);
1716 return codeBlob2objectArray(thread, env, &stub);
1717 WB_END
1718
1719 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1720 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1721 CHECK_JNI_EXCEPTION_(env, 0);
1722 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1723 return (jlong) mh->method_data();
1724 WB_END
1725
1726 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1727 return (jlong) thread->stack_size();
1728 WB_END
1729
1730 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1731 return (jlong) thread->stack_overflow_state()->stack_available(
1732 os::current_stack_pointer()) - (jlong)StackOverflow::stack_shadow_zone_size();
1733 WB_END
1734
1735
1736 int WhiteBox::array_bytes_to_length(size_t bytes) {
1737 return Array<u1>::bytes_to_length(bytes);
1738 }
1739
1740 ///////////////
1741 // MetaspaceTestContext and MetaspaceTestArena
1742 WB_ENTRY(jlong, WB_CreateMetaspaceTestContext(JNIEnv* env, jobject wb, jlong commit_limit, jlong reserve_limit))
1743 assert(is_aligned(commit_limit, BytesPerWord),
1744 "WB_CreateMetaspaceTestContext: commit_limit is not a multiple of the system word byte size");
1745 assert(is_aligned(reserve_limit, BytesPerWord),
1746 "WB_CreateMetaspaceTestContext: reserve_limit is not a multiple of the system word byte size");
1747 metaspace::MetaspaceTestContext* context =
1748 new metaspace::MetaspaceTestContext("whitebox-metaspace-context", (size_t) commit_limit / BytesPerWord,
1749 (size_t) reserve_limit / BytesPerWord);
1750 return (jlong)p2i(context);
1751 WB_END
1752
1753 WB_ENTRY(void, WB_DestroyMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1754 delete (metaspace::MetaspaceTestContext*) context;
1755 WB_END
1756
1757 WB_ENTRY(void, WB_PurgeMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1758 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1759 context0->purge_area();
1760 WB_END
1761
1762 WB_ENTRY(void, WB_PrintMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1763 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1764 context0->print_on(tty);
1765 WB_END
1766
1767 WB_ENTRY(jlong, WB_GetTotalCommittedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1768 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1769 return (jlong)context0->committed_words() * BytesPerWord;
1770 WB_END
1771
1772 WB_ENTRY(jlong, WB_GetTotalUsedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1773 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1774 return (jlong)context0->used_words() * BytesPerWord;
1775 WB_END
1776
1777 WB_ENTRY(jlong, WB_CreateArenaInTestContext(JNIEnv* env, jobject wb, jlong context, jboolean is_micro))
1778 const Metaspace::MetaspaceType type = is_micro ? Metaspace::ClassMirrorHolderMetaspaceType : Metaspace::StandardMetaspaceType;
1779 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1780 return (jlong)p2i(context0->create_arena(type));
1781 WB_END
1782
1783 WB_ENTRY(void, WB_DestroyMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena))
1784 delete (metaspace::MetaspaceTestArena*) arena;
1785 WB_END
1786
1787 WB_ENTRY(jlong, WB_AllocateFromMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong size))
1788 assert(is_aligned(size, BytesPerWord),
1789 "WB_AllocateFromMetaspaceTestArena: size is not a multiple of the system word byte size");
1790 metaspace::MetaspaceTestArena *arena0 = (metaspace::MetaspaceTestArena *)arena;
1791 MetaWord *p = arena0->allocate((size_t) size / BytesPerWord);
1792 return (jlong)p2i(p);
1793 WB_END
1794
1795 WB_ENTRY(void, WB_DeallocateToMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong p, jlong size))
1796 assert(is_aligned(size, BytesPerWord),
1797 "WB_DeallocateToMetaspaceTestArena: size is not a multiple of the system word byte size");
1798 metaspace::MetaspaceTestArena* arena0 = (metaspace::MetaspaceTestArena*) arena;
1799 arena0->deallocate((MetaWord*)p, (size_t) size / BytesPerWord);
1800 WB_END
1801
1802 WB_ENTRY(jlong, WB_GetMaxMetaspaceAllocationSize(JNIEnv* env, jobject wb))
1803 return (jlong) Metaspace::max_allocation_word_size() * BytesPerWord;
1804 WB_END
1805
1806 WB_ENTRY(jlong, WB_WordSize(JNIEnv* env))
1807 return (jlong)BytesPerWord;
1808 WB_END
1809
1810 WB_ENTRY(jlong, WB_RootChunkWordSize(JNIEnv* env))
1811 return (jlong)Metaspace::reserve_alignment_words();
1812 WB_END
1813
1814 WB_ENTRY(jboolean, WB_IsStaticallyLinked(JNIEnv* env, jobject wb))
1815 return JVM_IsStaticallyLinked();
1816 WB_END
1817
1818 //////////////
1819
1820 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1821 if (size < 0) {
1822 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1823 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1824 }
1825
1826 oop class_loader_oop = JNIHandles::resolve(class_loader);
1827 ClassLoaderData* cld = class_loader_oop != nullptr
1828 ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1829 : ClassLoaderData::the_null_class_loader_data();
1830
1831 void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1832
1833 return (jlong)(uintptr_t)metadata;
1834 WB_END
1835
1836 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1837 jstring version, jstring location, jobjectArray packages))
1838 Handle h_module (THREAD, JNIHandles::resolve(module));
1839 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1840 WB_END
1841
1842 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1843 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1844 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1845 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1846 WB_END
1847
1848 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1849 Handle h_module (THREAD, JNIHandles::resolve(module));
1850 Modules::add_module_exports_to_all_unnamed(h_module, package, CHECK);
1851 WB_END
1852
1853 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1854 Handle h_module (THREAD, JNIHandles::resolve(module));
1855 Modules::add_module_exports(h_module, package, Handle(), CHECK);
1856 WB_END
1857
1858 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1859 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1860 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1861 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1862 WB_END
1863
1864 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1865 if (inc < 0) {
1866 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1867 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1868 }
1869
1870 jlong max_size_t = (jlong) ((size_t) -1);
1871 if (inc > max_size_t) {
1872 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1873 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1874 }
1875
1876 size_t new_cap_until_GC = 0;
1877 size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1878 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1879 if (!success) {
1880 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1881 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1882 "due to contention with another thread");
1883 }
1884 return (jlong) new_cap_until_GC;
1885 WB_END
1886
1887 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1888 return (jlong) MetaspaceGC::capacity_until_GC();
1889 WB_END
1890
1891 // The function is only valid when CDS is available.
1892 WB_ENTRY(jlong, WB_MetaspaceSharedRegionAlignment(JNIEnv* env, jobject wb))
1893 #if INCLUDE_CDS
1894 return (jlong)MetaspaceShared::core_region_alignment();
1895 #else
1896 ShouldNotReachHere();
1897 return 0L;
1898 #endif
1899 WB_END
1900
1901 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1902 oop obj_oop = JNIHandles::resolve(obj);
1903 return (jboolean) obj_oop->mark().has_monitor();
1904 WB_END
1905
1906 WB_ENTRY(jboolean, WB_IsAsanEnabled(JNIEnv* env))
1907 return (jboolean) WhiteBox::is_asan_enabled();
1908 WB_END
1909
1910 WB_ENTRY(jboolean, WB_IsUbsanEnabled(JNIEnv* env))
1911 return (jboolean) WhiteBox::is_ubsan_enabled();
1912 WB_END
1913
1914 WB_ENTRY(jlong, WB_getInUseMonitorCount(JNIEnv* env, jobject wb))
1915 return (jlong) WhiteBox::get_in_use_monitor_count();
1916 WB_END
1917
1918 WB_ENTRY(jint, WB_getLockStackCapacity(JNIEnv* env))
1919 return (jint) LockStack::CAPACITY;
1920 WB_END
1921
1922 WB_ENTRY(jboolean, WB_supportsRecursiveLightweightLocking(JNIEnv* env))
1923 return (jboolean) VM_Version::supports_recursive_lightweight_locking();
1924 WB_END
1925
1926 WB_ENTRY(jboolean, WB_DeflateIdleMonitors(JNIEnv* env, jobject wb))
1927 log_info(monitorinflation)("WhiteBox initiated DeflateIdleMonitors");
1928 return ObjectSynchronizer::request_deflate_idle_monitors_from_wb();
1929 WB_END
1930
1931 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1932 VM_ForceSafepoint force_safepoint_op;
1933 VMThread::execute(&force_safepoint_op);
1934 WB_END
1935
1936 WB_ENTRY(void, WB_ForceClassLoaderStatsSafepoint(JNIEnv* env, jobject wb))
1937 nullStream dev_null;
1938 ClassLoaderStatsVMOperation force_op(&dev_null);
1939 VMThread::execute(&force_op);
1940 WB_END
1941
1942 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1943 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1944 return (jlong) ik->constants();
1945 WB_END
1946
1947 WB_ENTRY(jobjectArray, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass klass))
1948 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1949 objArrayOop resolved_refs= ik->constants()->resolved_references();
1950 return (jobjectArray)JNIHandles::make_local(THREAD, resolved_refs);
1951 WB_END
1952
1953 WB_ENTRY(jint, WB_getFieldEntriesLength(JNIEnv* env, jobject wb, jclass klass))
1954 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1955 ConstantPool* cp = ik->constants();
1956 if (cp->cache() == nullptr) {
1957 return -1;
1958 }
1959 return cp->resolved_field_entries_length();
1960 WB_END
1961
1962 WB_ENTRY(jint, WB_getFieldCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
1963 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1964 ConstantPool* cp = ik->constants();
1965 if (cp->cache() == nullptr) {
1966 return -1;
1967 }
1968 return cp->resolved_field_entry_at(index)->constant_pool_index();
1969 WB_END
1970
1971 WB_ENTRY(jint, WB_getMethodEntriesLength(JNIEnv* env, jobject wb, jclass klass))
1972 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1973 ConstantPool* cp = ik->constants();
1974 if (cp->cache() == nullptr) {
1975 return -1;
1976 }
1977 return cp->resolved_method_entries_length();
1978 WB_END
1979
1980 WB_ENTRY(jint, WB_getMethodCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
1981 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1982 ConstantPool* cp = ik->constants();
1983 if (cp->cache() == nullptr) {
1984 return -1;
1985 }
1986 return cp->resolved_method_entry_at(index)->constant_pool_index();
1987 WB_END
1988
1989 WB_ENTRY(jint, WB_getIndyInfoLength(JNIEnv* env, jobject wb, jclass klass))
1990 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1991 ConstantPool* cp = ik->constants();
1992 if (cp->cache() == nullptr) {
1993 return -1;
1994 }
1995 return cp->resolved_indy_entries_length();
1996 WB_END
1997
1998 WB_ENTRY(jint, WB_getIndyCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
1999 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
2000 ConstantPool* cp = ik->constants();
2001 if (cp->cache() == nullptr) {
2002 return -1;
2003 }
2004 return cp->resolved_indy_entry_at(index)->constant_pool_index();
2005 WB_END
2006
2007 WB_ENTRY(jobject, WB_printClasses(JNIEnv* env, jobject wb, jstring class_name_pattern, jint flags))
2008 ThreadToNativeFromVM ttnfv(thread);
2009 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2010 ResourceMark rm;
2011 stringStream st;
2012 {
2013 ThreadInVMfromNative ttvfn(thread); // back to VM
2014 ClassPrinter::print_classes(c, flags, &st);
2015 }
2016 jstring result = env->NewStringUTF(st.freeze());
2017 CHECK_JNI_EXCEPTION_(env, nullptr);
2018 return result;
2019 WB_END
2020
2021 WB_ENTRY(jobject, WB_printMethods(JNIEnv* env, jobject wb, jstring class_name_pattern, jstring method_pattern, jint flags))
2022 ThreadToNativeFromVM ttnfv(thread);
2023 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2024 const char* m = env->GetStringUTFChars(method_pattern, nullptr);
2025 ResourceMark rm;
2026 stringStream st;
2027 {
2028 ThreadInVMfromNative ttvfn(thread); // back to VM
2029 ClassPrinter::print_methods(c, m, flags, &st);
2030 }
2031 jstring result = env->NewStringUTF(st.freeze());
2032 CHECK_JNI_EXCEPTION_(env, nullptr);
2033 return result;
2034 WB_END
2035
2036 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
2037 VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
2038 VMThread::execute(&clear_ics);
2039 WB_END
2040
2041 template <typename T>
2042 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
2043 assert(value != nullptr, "sanity");
2044 if (method == nullptr || name == nullptr) {
2045 return false;
2046 }
2047 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
2048 CHECK_JNI_EXCEPTION_(env, false);
2049 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
2050 // can't be in VM when we call JNI
2051 ThreadToNativeFromVM ttnfv(thread);
2052 const char* flag_name = env->GetStringUTFChars(name, nullptr);
2053 CHECK_JNI_EXCEPTION_(env, false);
2054 CompileCommandEnum option = CompilerOracle::string_to_option(flag_name);
2055 env->ReleaseStringUTFChars(name, flag_name);
2056 if (option == CompileCommandEnum::Unknown) {
2057 return false;
2058 }
2059 if (!CompilerOracle::option_matches_type(option, *value)) {
2060 return false;
2061 }
2062 return CompilerOracle::has_option_value(mh, option, *value);
2063 }
2064
2065 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2066 bool result;
2067 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
2068 // can't be in VM when we call JNI
2069 ThreadToNativeFromVM ttnfv(thread);
2070 return booleanBox(thread, env, result);
2071 }
2072 return nullptr;
2073 WB_END
2074
2075 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2076 intx result;
2077 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
2078 // can't be in VM when we call JNI
2079 ThreadToNativeFromVM ttnfv(thread);
2080 return longBox(thread, env, result);
2081 }
2082 return nullptr;
2083 WB_END
2084
2085 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2086 uintx result;
2087 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
2088 // can't be in VM when we call JNI
2089 ThreadToNativeFromVM ttnfv(thread);
2090 return longBox(thread, env, result);
2091 }
2092 return nullptr;
2093 WB_END
2094
2095 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2096 double result;
2097 if (GetMethodOption <double> (thread, env, method, name, &result)) {
2098 // can't be in VM when we call JNI
2099 ThreadToNativeFromVM ttnfv(thread);
2100 return doubleBox(thread, env, result);
2101 }
2102 return nullptr;
2103 WB_END
2104
2105 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2106 ccstr ccstrResult;
2107 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
2108 // can't be in VM when we call JNI
2109 ThreadToNativeFromVM ttnfv(thread);
2110 jstring result = env->NewStringUTF(ccstrResult);
2111 CHECK_JNI_EXCEPTION_(env, nullptr);
2112 return result;
2113 }
2114 return nullptr;
2115 WB_END
2116
2117 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
2118 const char* p = CDSConfig::default_archive_path();
2119 ThreadToNativeFromVM ttn(thread);
2120 jstring path_string = env->NewStringUTF(p);
2121
2122 CHECK_JNI_EXCEPTION_(env, nullptr);
2123
2124 return path_string;
2125 WB_END
2126
2127 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
2128 return CDSConfig::is_using_archive();
2129 WB_END
2130
2131 WB_ENTRY(jint, WB_GetCDSGenericHeaderMinVersion(JNIEnv* env, jobject wb))
2132 #if INCLUDE_CDS
2133 return (jint)CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION;
2134 #else
2135 ShouldNotReachHere();
2136 return (jint)-1;
2137 #endif
2138 WB_END
2139
2140 WB_ENTRY(jint, WB_GetCDSCurrentVersion(JNIEnv* env, jobject wb))
2141 #if INCLUDE_CDS
2142 return (jint)CURRENT_CDS_ARCHIVE_VERSION;
2143 #else
2144 ShouldNotReachHere();
2145 return (jint)-1;
2146 #endif
2147 WB_END
2148
2149 WB_ENTRY(jboolean, WB_CDSMemoryMappingFailed(JNIEnv* env, jobject wb))
2150 return FileMapInfo::memory_mapping_failed();
2151 WB_END
2152
2153 WB_ENTRY(jboolean, WB_IsSharedInternedString(JNIEnv* env, jobject wb, jobject str))
2154 ResourceMark rm(THREAD);
2155 oop str_oop = JNIHandles::resolve(str);
2156 int length;
2157 jchar* chars = java_lang_String::as_unicode_string(str_oop, length, CHECK_(false));
2158 return StringTable::lookup_shared(chars, length) == str_oop;
2159 WB_END
2160
2161 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
2162 return (jboolean)MetaspaceShared::is_in_shared_metaspace(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2163 WB_END
2164
2165 WB_ENTRY(jboolean, WB_AreSharedStringsMapped(JNIEnv* env))
2166 return ArchiveHeapLoader::is_mapped();
2167 WB_END
2168
2169 WB_ENTRY(void, WB_LinkClass(JNIEnv* env, jobject wb, jclass clazz))
2170 Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2171 if (!k->is_instance_klass()) {
2172 return;
2173 }
2174 InstanceKlass *ik = InstanceKlass::cast(k);
2175 ik->link_class(THREAD); // may throw verification error
2176 WB_END
2177
2178 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
2179 return ArchiveHeapLoader::is_mapped();
2180 WB_END
2181
2182 WB_ENTRY(jboolean, WB_IsCDSIncluded(JNIEnv* env))
2183 #if INCLUDE_CDS
2184 // An exploded build inhibits use of CDS. Therefore, for the
2185 // purpose of testing, the JVM can be treated as not having CDS
2186 // built in at all.
2187 return ClassLoader::has_jrt_entry();
2188 #else
2189 return false;
2190 #endif // INCLUDE_CDS
2191 WB_END
2192
2193 WB_ENTRY(jboolean, WB_isC2OrJVMCIIncluded(JNIEnv* env))
2194 #if COMPILER2_OR_JVMCI
2195 return true;
2196 #else
2197 return false;
2198 #endif
2199 WB_END
2200
2201 WB_ENTRY(jboolean, WB_IsJVMCISupportedByGC(JNIEnv* env))
2202 #if INCLUDE_JVMCI
2203 return JVMCIGlobals::gc_supports_jvmci();
2204 #else
2205 return false;
2206 #endif
2207 WB_END
2208
2209 WB_ENTRY(jboolean, WB_CanWriteJavaHeapArchive(JNIEnv* env))
2210 return !CDSConfig::are_vm_options_incompatible_with_dumping_heap();
2211 WB_END
2212
2213
2214 WB_ENTRY(jboolean, WB_IsJFRIncluded(JNIEnv* env))
2215 #if INCLUDE_JFR
2216 return true;
2217 #else
2218 return false;
2219 #endif // INCLUDE_JFR
2220 WB_END
2221
2222 WB_ENTRY(jboolean, WB_IsDTraceIncluded(JNIEnv* env))
2223 #if defined(DTRACE_ENABLED)
2224 return true;
2225 #else
2226 return false;
2227 #endif // DTRACE_ENABLED
2228 WB_END
2229
2230 #if INCLUDE_CDS
2231
2232 WB_ENTRY(jint, WB_GetCDSOffsetForName(JNIEnv* env, jobject o, jstring name))
2233 ResourceMark rm;
2234 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2235 jint result = (jint)CDSConstants::get_cds_offset(c_name);
2236 return result;
2237 WB_END
2238
2239 WB_ENTRY(jint, WB_GetCDSConstantForName(JNIEnv* env, jobject o, jstring name))
2240 ResourceMark rm;
2241 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2242 jint result = (jint)CDSConstants::get_cds_constant(c_name);
2243 return result;
2244 WB_END
2245
2246 #endif // INCLUDE_CDS
2247
2248 WB_ENTRY(jboolean, WB_HandshakeReadMonitors(JNIEnv* env, jobject wb, jobject thread_handle))
2249 class ReadMonitorsHandshakeClosure : public HandshakeClosure {
2250 jboolean _executed;
2251
2252 void do_thread(Thread* th) {
2253 JavaThread* jt = JavaThread::cast(th);
2254 ResourceMark rm;
2255
2256 GrowableArray<MonitorInfo*>* info = new GrowableArray<MonitorInfo*>();
2257
2258 if (!jt->has_last_Java_frame()) {
2259 return;
2260 }
2261 RegisterMap rmap(jt,
2262 RegisterMap::UpdateMap::include,
2263 RegisterMap::ProcessFrames::include,
2264 RegisterMap::WalkContinuation::skip);
2265 for (javaVFrame* vf = jt->last_java_vframe(&rmap); vf != nullptr; vf = vf->java_sender()) {
2266 GrowableArray<MonitorInfo*> *monitors = vf->monitors();
2267 if (monitors != nullptr) {
2268 int len = monitors->length();
2269 // Walk monitors youngest to oldest
2270 for (int i = len - 1; i >= 0; i--) {
2271 MonitorInfo* mon_info = monitors->at(i);
2272 if (mon_info->eliminated()) continue;
2273 oop owner = mon_info->owner();
2274 if (owner != nullptr) {
2275 info->append(mon_info);
2276 }
2277 }
2278 }
2279 }
2280 _executed = true;
2281 }
2282
2283 public:
2284 ReadMonitorsHandshakeClosure() : HandshakeClosure("WB_HandshakeReadMonitors"), _executed(false) {}
2285 jboolean executed() const { return _executed; }
2286 };
2287
2288 ReadMonitorsHandshakeClosure rmhc;
2289 if (thread_handle != nullptr) {
2290 ThreadsListHandle tlh;
2291 JavaThread* target = nullptr;
2292 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2293 if (is_alive) {
2294 Handshake::execute(&rmhc, &tlh, target);
2295 }
2296 }
2297 return rmhc.executed();
2298 WB_END
2299
2300 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
2301 class TraceSelfHandshakeClosure : public HandshakeClosure {
2302 jint _num_threads_completed;
2303
2304 void do_thread(Thread* th) {
2305 JavaThread* jt = JavaThread::cast(th);
2306 ResourceMark rm;
2307
2308 jt->print_on(tty);
2309 jt->print_stack_on(tty);
2310 tty->cr();
2311 Atomic::inc(&_num_threads_completed);
2312 }
2313
2314 public:
2315 TraceSelfHandshakeClosure(Thread* thread) : HandshakeClosure("WB_TraceSelf"), _num_threads_completed(0) {}
2316
2317 jint num_threads_completed() const { return _num_threads_completed; }
2318 };
2319 TraceSelfHandshakeClosure tshc(Thread::current());
2320
2321 if (all_threads) {
2322 Handshake::execute(&tshc);
2323 } else if (thread_handle != nullptr) {
2324 ThreadsListHandle tlh;
2325 JavaThread* target = nullptr;
2326 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2327 if (is_alive) {
2328 Handshake::execute(&tshc, &tlh, target);
2329 }
2330 }
2331 return tshc.num_threads_completed();
2332 WB_END
2333
2334 WB_ENTRY(void, WB_AsyncHandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle))
2335 class TraceSelfHandshakeClosure : public AsyncHandshakeClosure {
2336 JavaThread* _self;
2337 void do_thread(Thread* th) {
2338 assert(th->is_Java_thread(), "sanity");
2339 // AsynchHandshake handshakes are only executed by target.
2340 assert(_self == th, "Must be");
2341 assert(Thread::current() == th, "Must be");
2342 JavaThread* jt = JavaThread::cast(th);
2343 ResourceMark rm;
2344 jt->print_on(tty);
2345 jt->print_stack_on(tty);
2346 tty->cr();
2347 }
2348
2349 public:
2350 TraceSelfHandshakeClosure(JavaThread* self_target) : AsyncHandshakeClosure("WB_TraceSelf"), _self(self_target) {}
2351 };
2352 if (thread_handle != nullptr) {
2353 ThreadsListHandle tlh;
2354 JavaThread* target = nullptr;
2355 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2356 if (is_alive) {
2357 TraceSelfHandshakeClosure* tshc = new TraceSelfHandshakeClosure(target);
2358 Handshake::execute(tshc, target);
2359 }
2360 }
2361 WB_END
2362
2363 static volatile int _emulated_lock = 0;
2364
2365 WB_ENTRY(void, WB_LockAndBlock(JNIEnv* env, jobject wb, jboolean suspender))
2366 JavaThread* self = JavaThread::current();
2367
2368 {
2369 // Before trying to acquire the lock transition into a safepoint safe state.
2370 // Otherwise if either suspender or suspendee blocks for a safepoint
2371 // in ~ThreadBlockInVM the other one could loop forever trying to acquire
2372 // the lock without allowing the safepoint to progress.
2373 ThreadBlockInVM tbivm(self);
2374
2375 // We will deadlock here if we are 'suspender' and 'suspendee'
2376 // suspended in ~ThreadBlockInVM. This verifies we only suspend
2377 // at the right place.
2378 while (Atomic::cmpxchg(&_emulated_lock, 0, 1) != 0) {}
2379 assert(_emulated_lock == 1, "Must be locked");
2380
2381 // Sleep much longer in suspendee to force situation where
2382 // 'suspender' is waiting above to acquire lock.
2383 os::naked_short_sleep(suspender ? 1 : 10);
2384 }
2385 Atomic::store(&_emulated_lock, 0);
2386 WB_END
2387
2388 // Some convenience methods to deal with objects from java
2389 int WhiteBox::offset_for_field(const char* field_name, oop object,
2390 Symbol* signature_symbol) {
2391 assert(field_name != nullptr && strlen(field_name) > 0, "Field name not valid");
2392
2393 //Get the class of our object
2394 Klass* arg_klass = object->klass();
2395 //Turn it into an instance-klass
2396 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
2397
2398 //Create symbols to look for in the class
2399 TempNewSymbol name_symbol = SymbolTable::new_symbol(field_name);
2400
2401 //To be filled in with an offset of the field we're looking for
2402 fieldDescriptor fd;
2403
2404 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2405 if (res == nullptr) {
2406 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2407 name_symbol->as_C_string());
2408 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2409 }
2410
2411 //fetch the field at the offset we've found
2412 int dest_offset = fd.offset();
2413
2414 return dest_offset;
2415 }
2416
2417
2418 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2419 int offset = offset_for_field(field_name, object,
2420 vmSymbols::string_signature());
2421 oop string = object->obj_field(offset);
2422 if (string == nullptr) {
2423 return nullptr;
2424 }
2425 const char* ret = java_lang_String::as_utf8_string(string);
2426 return ret;
2427 }
2428
2429 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2430 int offset =
2431 offset_for_field(field_name, object, vmSymbols::bool_signature());
2432 bool ret = (object->bool_field(offset) == JNI_TRUE);
2433 return ret;
2434 }
2435
2436 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2437 ResourceMark rm;
2438 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(wbclass));
2439 const char* klass_name = klass->external_name();
2440
2441 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2442
2443 // one by one registration natives for exception catching
2444 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2445 CHECK_JNI_EXCEPTION(env);
2446 for (int i = 0, n = method_count; i < n; ++i) {
2447 // Skip dummy entries
2448 if (method_array[i].fnPtr == nullptr) continue;
2449 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2450 jthrowable throwable_obj = env->ExceptionOccurred();
2451 if (throwable_obj != nullptr) {
2452 env->ExceptionClear();
2453 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2454 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2455 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2456 tty->print_cr("Warning: 'NoSuchMethodError' on register of %s::%s%s",
2457 klass_name, method_array[i].name, method_array[i].signature);
2458 }
2459 } else {
2460 // Registration failed unexpectedly.
2461 tty->print_cr("Warning: unexpected error on register of %s::%s%s. All methods will be unregistered",
2462 klass_name, method_array[i].name, method_array[i].signature);
2463 env->UnregisterNatives(wbclass);
2464 break;
2465 }
2466 }
2467 }
2468 }
2469
2470 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2471 // can't be in VM when we call JNI
2472 ThreadToNativeFromVM ttnfv(thread);
2473 const char* dir = env->GetStringUTFChars(compDirect, nullptr);
2474 CHECK_JNI_EXCEPTION_(env, 0);
2475 int ret;
2476 {
2477 ThreadInVMfromNative ttvfn(thread); // back to VM
2478 ret = DirectivesParser::parse_string(dir, tty);
2479 }
2480 env->ReleaseStringUTFChars(compDirect, dir);
2481 // -1 for error parsing directive. Return 0 as number of directives added.
2482 if (ret == -1) {
2483 ret = 0;
2484 }
2485 return (jint) ret;
2486 WB_END
2487
2488 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2489 DirectivesStack::pop(count);
2490 WB_END
2491
2492 // Checks that the library libfile has the noexecstack bit set.
2493 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2494 jboolean ret = false;
2495 #ifdef LINUX
2496 // Can't be in VM when we call JNI.
2497 ThreadToNativeFromVM ttnfv(thread);
2498 const char* lf = env->GetStringUTFChars(libfile, nullptr);
2499 CHECK_JNI_EXCEPTION_(env, 0);
2500 ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2501 env->ReleaseStringUTFChars(libfile, lf);
2502 #endif
2503 return ret;
2504 WB_END
2505
2506 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2507 LINUX_ONLY(return OSContainer::is_containerized();)
2508 return false;
2509 WB_END
2510
2511 // Physical memory of the host machine (including containers)
2512 WB_ENTRY(jlong, WB_HostPhysicalMemory(JNIEnv* env, jobject o))
2513 LINUX_ONLY(return os::Linux::physical_memory();)
2514 return os::physical_memory();
2515 WB_END
2516
2517 // Available memory of the host machine (container-aware)
2518 WB_ENTRY(jlong, WB_HostAvailableMemory(JNIEnv* env, jobject o))
2519 return os::available_memory();
2520 WB_END
2521
2522 // Physical swap of the host machine (including containers), Linux only.
2523 WB_ENTRY(jlong, WB_HostPhysicalSwap(JNIEnv* env, jobject o))
2524 LINUX_ONLY(return (jlong)os::Linux::host_swap();)
2525 return -1; // Not used/implemented on other platforms
2526 WB_END
2527
2528 WB_ENTRY(jint, WB_ValidateCgroup(JNIEnv* env,
2529 jobject o,
2530 jboolean cgroups_v2_enabled,
2531 jstring controllers_file,
2532 jstring proc_self_cgroup,
2533 jstring proc_self_mountinfo))
2534 jint ret = 0;
2535 #ifdef LINUX
2536 ThreadToNativeFromVM ttnfv(thread);
2537 const char* c_file = env->GetStringUTFChars(controllers_file, nullptr);
2538 CHECK_JNI_EXCEPTION_(env, 0);
2539 const char* p_s_cgroup = env->GetStringUTFChars(proc_self_cgroup, nullptr);
2540 CHECK_JNI_EXCEPTION_(env, 0);
2541 const char* p_s_mountinfo = env->GetStringUTFChars(proc_self_mountinfo, nullptr);
2542 CHECK_JNI_EXCEPTION_(env, 0);
2543 u1 cg_type_flags = 0;
2544 // This sets cg_type_flags
2545 WhiteBox::validate_cgroup(cgroups_v2_enabled, c_file, p_s_cgroup, p_s_mountinfo, &cg_type_flags);
2546 ret = (jint)cg_type_flags;
2547 env->ReleaseStringUTFChars(controllers_file, c_file);
2548 env->ReleaseStringUTFChars(proc_self_cgroup, p_s_cgroup);
2549 env->ReleaseStringUTFChars(proc_self_mountinfo, p_s_mountinfo);
2550 #endif
2551 return ret;
2552 WB_END
2553
2554 // Available cpus of the host machine, Linux only.
2555 // Used in container testing.
2556 WB_ENTRY(jint, WB_HostCPUs(JNIEnv* env, jobject o))
2557 LINUX_ONLY(return os::Linux::active_processor_count();)
2558 return -1; // Not used/implemented on other platforms
2559 WB_END
2560
2561 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2562 os::print_os_info(tty);
2563 WB_END
2564
2565 // Elf decoder
2566 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2567 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2568 ElfFile::_do_not_cache_elf_section = true;
2569 #endif
2570 WB_END
2571
2572 WB_ENTRY(jlong, WB_ResolvedMethodItemsCount(JNIEnv* env, jobject o))
2573 return (jlong) ResolvedMethodTable::items_count();
2574 WB_END
2575
2576 WB_ENTRY(jint, WB_GetKlassMetadataSize(JNIEnv* env, jobject wb, jclass mirror))
2577 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(mirror));
2578 // Return size in bytes.
2579 return k->size() * wordSize;
2580 WB_END
2581
2582 // See test/hotspot/jtreg/runtime/Thread/ThreadObjAccessAtExit.java.
2583 // It explains how the thread's priority field is used for test state coordination.
2584 //
2585 WB_ENTRY(void, WB_CheckThreadObjOfTerminatingThread(JNIEnv* env, jobject wb, jobject target_handle))
2586 oop target_oop = JNIHandles::resolve_non_null(target_handle);
2587 jlong tid = java_lang_Thread::thread_id(target_oop);
2588 JavaThread* target = java_lang_Thread::thread(target_oop);
2589
2590 // Grab a ThreadsListHandle to protect the target thread whilst terminating
2591 ThreadsListHandle tlh;
2592
2593 // Look up the target thread by tid to ensure it is present
2594 JavaThread* t = tlh.list()->find_JavaThread_from_java_tid(tid);
2595 if (t == nullptr) {
2596 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread not found in ThreadsList!");
2597 }
2598
2599 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is protected");
2600 // Allow target to terminate by boosting priority
2601 java_lang_Thread::set_priority(t->threadObj(), ThreadPriority(NormPriority + 1));
2602
2603 // Now wait for the target to terminate
2604 while (!target->is_terminated()) {
2605 ThreadBlockInVM tbivm(thread); // just in case target is involved in a safepoint
2606 os::naked_short_sleep(0);
2607 }
2608
2609 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is terminated");
2610
2611 // Now release the GC inducing thread - we have to re-resolve the external oop that
2612 // was passed in as GC may have occurred and we don't know if we can trust t->threadObj() now.
2613 oop original = JNIHandles::resolve_non_null(target_handle);
2614 java_lang_Thread::set_priority(original, ThreadPriority(NormPriority + 2));
2615
2616 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: GC has been initiated - checking threadObj:");
2617
2618 // The Java code should be creating garbage and triggering GC, which would potentially move
2619 // the threadObj oop. If the exiting thread is properly protected then its threadObj should
2620 // remain valid and equal to our initial target_handle. Loop a few times to give GC a chance to
2621 // kick in.
2622 for (int i = 0; i < 5; i++) {
2623 oop original = JNIHandles::resolve_non_null(target_handle);
2624 oop current = t->threadObj();
2625 if (original != current) {
2626 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: failed comparison on iteration %d", i);
2627 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread oop has changed!");
2628 } else {
2629 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: successful comparison on iteration %d", i);
2630 ThreadBlockInVM tbivm(thread);
2631 os::naked_short_sleep(50);
2632 }
2633 }
2634 WB_END
2635
2636 WB_ENTRY(void, WB_VerifyFrames(JNIEnv* env, jobject wb, jboolean log, jboolean update_map))
2637 ResourceMark rm; // for verify
2638 stringStream st;
2639 for (StackFrameStream fst(JavaThread::current(), update_map, true); !fst.is_done(); fst.next()) {
2640 frame* current_frame = fst.current();
2641 if (log) {
2642 current_frame->print_value_on(&st);
2643 }
2644 current_frame->verify(fst.register_map());
2645 }
2646 if (log) {
2647 tty->print_cr("[WhiteBox::VerifyFrames] Walking Frames");
2648 tty->print_raw(st.freeze());
2649 tty->print_cr("[WhiteBox::VerifyFrames] Done");
2650 }
2651 WB_END
2652
2653 WB_ENTRY(jboolean, WB_IsJVMTIIncluded(JNIEnv* env, jobject wb))
2654 #if INCLUDE_JVMTI
2655 return JNI_TRUE;
2656 #else
2657 return JNI_FALSE;
2658 #endif
2659 WB_END
2660
2661 WB_ENTRY(void, WB_WaitUnsafe(JNIEnv* env, jobject wb, jint time))
2662 os::naked_short_sleep(time);
2663 WB_END
2664
2665 WB_ENTRY(jstring, WB_GetLibcName(JNIEnv* env, jobject o))
2666 ThreadToNativeFromVM ttn(thread);
2667 jstring info_string = env->NewStringUTF(XSTR(LIBC));
2668 CHECK_JNI_EXCEPTION_(env, nullptr);
2669 return info_string;
2670 WB_END
2671
2672 WB_ENTRY(void, WB_PinObject(JNIEnv* env, jobject wb, jobject o))
2673 #if INCLUDE_G1GC
2674 if (!UseG1GC) {
2675 ShouldNotReachHere();
2676 return;
2677 }
2678 oop obj = JNIHandles::resolve(o);
2679 G1CollectedHeap::heap()->pin_object(thread, obj);
2680 #else
2681 ShouldNotReachHere();
2682 #endif // INCLUDE_G1GC
2683 WB_END
2684
2685 WB_ENTRY(void, WB_UnpinObject(JNIEnv* env, jobject wb, jobject o))
2686 #if INCLUDE_G1GC
2687 if (!UseG1GC) {
2688 ShouldNotReachHere();
2689 return;
2690 }
2691 oop obj = JNIHandles::resolve(o);
2692 G1CollectedHeap::heap()->unpin_object(thread, obj);
2693 #else
2694 ShouldNotReachHere();
2695 #endif // INCLUDE_G1GC
2696 WB_END
2697
2698 WB_ENTRY(jboolean, WB_SetVirtualThreadsNotifyJvmtiMode(JNIEnv* env, jobject wb, jboolean enable))
2699 if (!Continuations::enabled()) {
2700 tty->print_cr("WB error: must be Continuations::enabled()!");
2701 return JNI_FALSE;
2702 }
2703 jboolean result = false;
2704 #if INCLUDE_JVMTI
2705 if (enable) {
2706 result = JvmtiEnvBase::enable_virtual_threads_notify_jvmti();
2707 } else {
2708 result = JvmtiEnvBase::disable_virtual_threads_notify_jvmti();
2709 }
2710 #endif
2711 return result;
2712 WB_END
2713
2714 WB_ENTRY(void, WB_PreTouchMemory(JNIEnv* env, jobject wb, jlong addr, jlong size))
2715 void* const from = (void*)addr;
2716 void* const to = (void*)(addr + size);
2717 if (from > to) {
2718 os::pretouch_memory(from, to, os::vm_page_size());
2719 }
2720 WB_END
2721
2722 WB_ENTRY(void, WB_CleanMetaspaces(JNIEnv* env, jobject target))
2723 ClassLoaderDataGraph::safepoint_and_clean_metaspaces();
2724 WB_END
2725
2726 // Reports resident set size (RSS) in bytes
2727 WB_ENTRY(jlong, WB_Rss(JNIEnv* env, jobject o))
2728 return os::rss();
2729 WB_END
2730
2731 #define CC (char*)
2732
2733 static JNINativeMethod methods[] = {
2734 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
2735 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
2736 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
2737 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
2738 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
2739 {CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
2740 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
2741 {CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
2742 {CC"getHeapAlignment", CC"()J", (void*)&WB_GetHeapAlignment},
2743 {CC"countAliveClasses0", CC"(Ljava/lang/String;)I", (void*)&WB_CountAliveClasses },
2744 {CC"getSymbolRefcount", CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2745 {CC"parseCommandLine0",
2746 CC"(Ljava/lang/String;C[Ljdk/test/whitebox/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2747 (void*) &WB_ParseCommandLine
2748 },
2749 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2750 (void*)&WB_AddToBootstrapClassLoaderSearch},
2751 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2752 (void*)&WB_AddToSystemClassLoaderSearch},
2753 {CC"getCompressedOopsMaxHeapSize", CC"()J",
2754 (void*)&WB_GetCompressedOopsMaxHeapSize},
2755 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
2756 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
2757 {CC"decodeNKlassAndAccessKlass",CC"(I)V", (void*)&WB_DecodeNKlassAndAccessKlass},
2758 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
2759 #if INCLUDE_CDS
2760 {CC"getCDSOffsetForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSOffsetForName},
2761 {CC"getCDSConstantForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSConstantForName},
2762 #endif
2763 #if INCLUDE_G1GC
2764 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
2765 {CC"g1CompletedConcurrentMarkCycles", CC"()I", (void*)&WB_G1CompletedConcurrentMarkCycles},
2766 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
2767 {CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
2768 {CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
2769 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
2770 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
2771 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
2772 {CC"g1HasRegionsToUncommit", CC"()Z", (void*)&WB_G1HasRegionsToUncommit},
2773 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2774 (void*)&WB_G1AuxiliaryMemoryUsage },
2775 {CC"g1ActiveMemoryNodeCount", CC"()I", (void*)&WB_G1ActiveMemoryNodeCount },
2776 {CC"g1MemoryNodeIds", CC"()[I", (void*)&WB_G1MemoryNodeIds },
2777 {CC"g1GetMixedGCInfo", CC"(I)[J", (void*)&WB_G1GetMixedGCInfo },
2778 #endif // INCLUDE_G1GC
2779 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
2780 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
2781 {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J", (void*)&WB_NMTMallocWithPseudoStackAndType},
2782 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
2783 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
2784 {CC"NMTAttemptReserveMemoryAt", CC"(JJ)J", (void*)&WB_NMTAttemptReserveMemoryAt },
2785 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
2786 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
2787 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
2788 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
2789 {CC"NMTNewArena", CC"(J)J", (void*)&WB_NMTNewArena },
2790 {CC"NMTFreeArena", CC"(J)V", (void*)&WB_NMTFreeArena },
2791 {CC"NMTArenaMalloc", CC"(JJ)V", (void*)&WB_NMTArenaMalloc },
2792 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
2793 {CC"isFrameDeoptimized", CC"(I)Z", (void*)&WB_IsFrameDeoptimized},
2794 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
2795 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
2796 (void*)&WB_DeoptimizeMethod },
2797 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
2798 (void*)&WB_IsMethodCompiled },
2799 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
2800 (void*)&WB_IsMethodCompilable},
2801 {CC"isMethodQueuedForCompilation0",
2802 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
2803 {CC"isIntrinsicAvailable0",
2804 CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
2805 (void*)&WB_IsIntrinsicAvailable},
2806 {CC"makeMethodNotCompilable0",
2807 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
2808 {CC"testSetDontInlineMethod0",
2809 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
2810 {CC"getMethodCompilationLevel0",
2811 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
2812 {CC"getMethodDecompileCount0",
2813 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodDecompileCount},
2814 {CC"getMethodTrapCount0",
2815 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2816 (void*)&WB_GetMethodTrapCount},
2817 {CC"getDeoptCount0",
2818 CC"(Ljava/lang/String;Ljava/lang/String;)I", (void*)&WB_GetDeoptCount},
2819 {CC"getMethodEntryBci0",
2820 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
2821 {CC"getCompileQueueSize",
2822 CC"(I)I", (void*)&WB_GetCompileQueueSize},
2823 {CC"testSetForceInlineMethod0",
2824 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
2825 {CC"enqueueMethodForCompilation0",
2826 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
2827 {CC"enqueueInitializerForCompilation0",
2828 CC"(Ljava/lang/Class;I)Z", (void*)&WB_EnqueueInitializerForCompilation},
2829 {CC"markMethodProfiled",
2830 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_MarkMethodProfiled},
2831 {CC"clearMethodState0",
2832 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
2833 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
2834 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
2835 {CC"matchesMethod",
2836 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2837 (void*)&WB_MatchesMethod},
2838 {CC"matchesInline",
2839 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2840 (void*)&WB_MatchesInline},
2841 {CC"shouldPrintAssembly",
2842 CC"(Ljava/lang/reflect/Executable;I)Z",
2843 (void*)&WB_ShouldPrintAssembly},
2844
2845 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
2846 {CC"isDefaultVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsDefaultVMFlag},
2847 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
2848 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
2849 {CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
2850 {CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
2851 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
2852 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
2853 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
2854 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
2855 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
2856 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
2857 (void*)&WB_SetStringVMFlag},
2858 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
2859 (void*)&WB_GetBooleanVMFlag},
2860 {CC"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2861 (void*)&WB_GetIntVMFlag},
2862 {CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2863 (void*)&WB_GetUintVMFlag},
2864 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2865 (void*)&WB_GetIntxVMFlag},
2866 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2867 (void*)&WB_GetUintxVMFlag},
2868 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2869 (void*)&WB_GetUint64VMFlag},
2870 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2871 (void*)&WB_GetSizeTVMFlag},
2872 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
2873 (void*)&WB_GetDoubleVMFlag},
2874 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
2875 (void*)&WB_GetStringVMFlag},
2876 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
2877 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
2878 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
2879 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
2880 {CC"allocateMetaspace",
2881 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
2882 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
2883 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
2884 {CC"metaspaceSharedRegionAlignment", CC"()J", (void*)&WB_MetaspaceSharedRegionAlignment },
2885 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
2886 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
2887 (void*)&WB_GetNMethod },
2888 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
2889 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
2890 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
2891 {CC"getCompilationActivityMode",
2892 CC"()I", (void*)&WB_GetCompilationActivityMode},
2893 {CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
2894 (void*)&WB_GetMethodData },
2895 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
2896 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
2897 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
2898 {CC"DefineModule", CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
2899 (void*)&WB_DefineModule },
2900 {CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
2901 (void*)&WB_AddModuleExports },
2902 {CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
2903 (void*)&WB_AddReadsModule },
2904 {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2905 (void*)&WB_AddModuleExportsToAllUnnamed },
2906 {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2907 (void*)&WB_AddModuleExportsToAll },
2908 {CC"deflateIdleMonitors", CC"()Z", (void*)&WB_DeflateIdleMonitors },
2909 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
2910 {CC"isAsanEnabled", CC"()Z", (void*)&WB_IsAsanEnabled },
2911 {CC"isUbsanEnabled", CC"()Z", (void*)&WB_IsUbsanEnabled },
2912 {CC"getInUseMonitorCount", CC"()J", (void*)&WB_getInUseMonitorCount },
2913 {CC"getLockStackCapacity", CC"()I", (void*)&WB_getLockStackCapacity },
2914 {CC"supportsRecursiveLightweightLocking", CC"()Z", (void*)&WB_supportsRecursiveLightweightLocking },
2915 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
2916 {CC"forceClassLoaderStatsSafepoint", CC"()V", (void*)&WB_ForceClassLoaderStatsSafepoint },
2917 {CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
2918 {CC"getResolvedReferences0", CC"(Ljava/lang/Class;)[Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
2919 {CC"getFieldEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getFieldEntriesLength},
2920 {CC"getFieldCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getFieldCPIndex},
2921 {CC"getMethodEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getMethodEntriesLength},
2922 {CC"getMethodCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getMethodCPIndex},
2923 {CC"getIndyInfoLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getIndyInfoLength},
2924 {CC"getIndyCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getIndyCPIndex},
2925 {CC"printClasses0", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printClasses},
2926 {CC"printMethods0", CC"(Ljava/lang/String;Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printMethods},
2927 {CC"getMethodBooleanOption",
2928 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
2929 (void*)&WB_GetMethodBooleaneOption},
2930 {CC"getMethodIntxOption",
2931 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2932 (void*)&WB_GetMethodIntxOption},
2933 {CC"getMethodUintxOption",
2934 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2935 (void*)&WB_GetMethodUintxOption},
2936 {CC"getMethodDoubleOption",
2937 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
2938 (void*)&WB_GetMethodDoubleOption},
2939 {CC"getMethodStringOption",
2940 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
2941 (void*)&WB_GetMethodStringOption},
2942 {CC"getDefaultArchivePath", CC"()Ljava/lang/String;",
2943 (void*)&WB_GetDefaultArchivePath},
2944 {CC"getCDSGenericHeaderMinVersion", CC"()I", (void*)&WB_GetCDSGenericHeaderMinVersion},
2945 {CC"getCurrentCDSVersion", CC"()I", (void*)&WB_GetCDSCurrentVersion},
2946 {CC"isSharingEnabled", CC"()Z", (void*)&WB_IsSharingEnabled},
2947 {CC"isSharedInternedString", CC"(Ljava/lang/String;)Z", (void*)&WB_IsSharedInternedString },
2948 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
2949 {CC"areSharedStringsMapped", CC"()Z", (void*)&WB_AreSharedStringsMapped },
2950 {CC"linkClass", CC"(Ljava/lang/Class;)V", (void*)&WB_LinkClass},
2951 {CC"areOpenArchiveHeapObjectsMapped", CC"()Z", (void*)&WB_AreOpenArchiveHeapObjectsMapped},
2952 {CC"isCDSIncluded", CC"()Z", (void*)&WB_IsCDSIncluded },
2953 {CC"isJFRIncluded", CC"()Z", (void*)&WB_IsJFRIncluded },
2954 {CC"isDTraceIncluded", CC"()Z", (void*)&WB_IsDTraceIncluded },
2955 {CC"hasLibgraal", CC"()Z", (void*)&WB_HasLibgraal },
2956 {CC"isC2OrJVMCIIncluded", CC"()Z", (void*)&WB_isC2OrJVMCIIncluded },
2957 {CC"isJVMCISupportedByGC", CC"()Z", (void*)&WB_IsJVMCISupportedByGC},
2958 {CC"canWriteJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteJavaHeapArchive },
2959 {CC"cdsMemoryMappingFailed", CC"()Z", (void*)&WB_CDSMemoryMappingFailed },
2960
2961 {CC"clearInlineCaches0", CC"(Z)V", (void*)&WB_ClearInlineCaches },
2962 {CC"handshakeReadMonitors", CC"(Ljava/lang/Thread;)Z", (void*)&WB_HandshakeReadMonitors },
2963 {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
2964 {CC"asyncHandshakeWalkStack", CC"(Ljava/lang/Thread;)V", (void*)&WB_AsyncHandshakeWalkStack },
2965 {CC"lockAndBlock", CC"(Z)V", (void*)&WB_LockAndBlock},
2966 {CC"checkThreadObjOfTerminatingThread", CC"(Ljava/lang/Thread;)V", (void*)&WB_CheckThreadObjOfTerminatingThread },
2967 {CC"verifyFrames", CC"(ZZ)V", (void*)&WB_VerifyFrames },
2968 {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
2969 (void*)&WB_AddCompilerDirective },
2970 {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
2971 {CC"isGCSupported", CC"(I)Z", (void*)&WB_IsGCSupported},
2972 {CC"isGCSupportedByJVMCICompiler", CC"(I)Z", (void*)&WB_IsGCSupportedByJVMCICompiler},
2973 {CC"isGCSelected", CC"(I)Z", (void*)&WB_IsGCSelected},
2974 {CC"isGCSelectedErgonomically", CC"()Z", (void*)&WB_IsGCSelectedErgonomically},
2975 {CC"supportsConcurrentGCBreakpoints", CC"()Z", (void*)&WB_SupportsConcurrentGCBreakpoints},
2976 {CC"concurrentGCAcquireControl0", CC"()V", (void*)&WB_ConcurrentGCAcquireControl},
2977 {CC"concurrentGCReleaseControl0", CC"()V", (void*)&WB_ConcurrentGCReleaseControl},
2978 {CC"concurrentGCRunToIdle0", CC"()V", (void*)&WB_ConcurrentGCRunToIdle},
2979 {CC"concurrentGCRunTo0", CC"(Ljava/lang/String;)Z",
2980 (void*)&WB_ConcurrentGCRunTo},
2981 {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
2982 (void*)&WB_CheckLibSpecifiesNoexecstack},
2983 {CC"isContainerized", CC"()Z", (void*)&WB_IsContainerized },
2984 {CC"validateCgroup",
2985 CC"(ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
2986 (void*)&WB_ValidateCgroup },
2987 {CC"hostPhysicalMemory", CC"()J", (void*)&WB_HostPhysicalMemory },
2988 {CC"hostPhysicalSwap", CC"()J", (void*)&WB_HostPhysicalSwap },
2989 {CC"hostAvailableMemory", CC"()J", (void*)&WB_HostAvailableMemory },
2990 {CC"hostCPUs", CC"()I", (void*)&WB_HostCPUs },
2991 {CC"printOsInfo", CC"()V", (void*)&WB_PrintOsInfo },
2992 {CC"disableElfSectionCache", CC"()V", (void*)&WB_DisableElfSectionCache },
2993 {CC"resolvedMethodItemsCount", CC"()J", (void*)&WB_ResolvedMethodItemsCount },
2994 {CC"getKlassMetadataSize", CC"(Ljava/lang/Class;)I",(void*)&WB_GetKlassMetadataSize},
2995
2996 {CC"createMetaspaceTestContext", CC"(JJ)J", (void*)&WB_CreateMetaspaceTestContext},
2997 {CC"destroyMetaspaceTestContext", CC"(J)V", (void*)&WB_DestroyMetaspaceTestContext},
2998 {CC"purgeMetaspaceTestContext", CC"(J)V", (void*)&WB_PurgeMetaspaceTestContext},
2999 {CC"printMetaspaceTestContext", CC"(J)V", (void*)&WB_PrintMetaspaceTestContext},
3000 {CC"getTotalCommittedBytesInMetaspaceTestContext", CC"(J)J",(void*)&WB_GetTotalCommittedBytesInMetaspaceTestContext},
3001 {CC"getTotalUsedBytesInMetaspaceTestContext", CC"(J)J", (void*)&WB_GetTotalUsedBytesInMetaspaceTestContext},
3002 {CC"createArenaInTestContext", CC"(JZ)J", (void*)&WB_CreateArenaInTestContext},
3003 {CC"destroyMetaspaceTestArena", CC"(J)V", (void*)&WB_DestroyMetaspaceTestArena},
3004 {CC"allocateFromMetaspaceTestArena", CC"(JJ)J", (void*)&WB_AllocateFromMetaspaceTestArena},
3005 {CC"deallocateToMetaspaceTestArena", CC"(JJJ)V", (void*)&WB_DeallocateToMetaspaceTestArena},
3006 {CC"maxMetaspaceAllocationSize", CC"()J", (void*)&WB_GetMaxMetaspaceAllocationSize},
3007
3008 {CC"isJVMTIIncluded", CC"()Z", (void*)&WB_IsJVMTIIncluded},
3009 {CC"waitUnsafe", CC"(I)V", (void*)&WB_WaitUnsafe},
3010 {CC"getLibcName", CC"()Ljava/lang/String;", (void*)&WB_GetLibcName},
3011
3012 {CC"pinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_PinObject},
3013 {CC"unpinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_UnpinObject},
3014 {CC"setVirtualThreadsNotifyJvmtiMode", CC"(Z)Z", (void*)&WB_SetVirtualThreadsNotifyJvmtiMode},
3015 {CC"preTouchMemory", CC"(JJ)V", (void*)&WB_PreTouchMemory},
3016 {CC"cleanMetaspaces", CC"()V", (void*)&WB_CleanMetaspaces},
3017 {CC"rss", CC"()J", (void*)&WB_Rss},
3018 {CC"printString", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_PrintString},
3019 {CC"lockAndStuckInSafepoint", CC"()V", (void*)&WB_TakeLockAndHangInSafepoint},
3020 {CC"wordSize", CC"()J", (void*)&WB_WordSize},
3021 {CC"rootChunkWordSize", CC"()J", (void*)&WB_RootChunkWordSize},
3022 {CC"isStatic", CC"()Z", (void*)&WB_IsStaticallyLinked}
3023 };
3024
3025
3026 #undef CC
3027
3028 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
3029 {
3030 if (WhiteBoxAPI) {
3031 // Make sure that wbclass is loaded by the null classloader
3032 InstanceKlass* ik = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve(wbclass)));
3033 Handle loader(THREAD, ik->class_loader());
3034 if (loader.is_null()) {
3035 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
3036 WhiteBox::set_used();
3037 }
3038 }
3039 }
3040 JVM_END