1 /*
2 * Copyright (c) 2012, 2026, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds.h"
26 #include "cds/aotMappedHeapLoader.hpp"
27 #include "cds/aotMetaspace.hpp"
28 #include "cds/cdsConstants.hpp"
29 #include "cds/filemap.hpp"
30 #include "cds/heapShared.inline.hpp"
31 #include "classfile/classLoader.hpp"
32 #include "classfile/classLoaderDataGraph.hpp"
33 #include "classfile/classLoaderStats.hpp"
34 #include "classfile/classPrinter.hpp"
35 #include "classfile/javaClasses.inline.hpp"
36 #include "classfile/modules.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/codeCache.hpp"
42 #include "code/compiledIC.hpp"
43 #include "compiler/compilationPolicy.hpp"
44 #include "compiler/compilerOracle.hpp"
45 #include "compiler/directivesParser.hpp"
46 #include "compiler/methodMatcher.hpp"
47 #include "gc/shared/concurrentGCBreakpoints.hpp"
48 #include "gc/shared/gcConfig.hpp"
49 #include "gc/shared/genArguments.hpp"
50 #include "jfr/periodic/sampling/jfrCPUTimeThreadSampler.hpp"
51 #include "jvm.h"
52 #include "jvmtifiles/jvmtiEnv.hpp"
53 #include "logging/log.hpp"
54 #include "memory/iterator.hpp"
55 #include "memory/memoryReserver.hpp"
56 #include "memory/metadataFactory.hpp"
57 #include "memory/metaspace/testHelpers.hpp"
58 #include "memory/metaspaceUtils.hpp"
59 #include "memory/oopFactory.hpp"
60 #include "memory/resourceArea.hpp"
61 #include "memory/universe.hpp"
62 #include "nmt/mallocSiteTable.hpp"
63 #include "oops/array.hpp"
64 #include "oops/compressedOops.hpp"
65 #include "oops/constantPool.inline.hpp"
66 #include "oops/klass.inline.hpp"
67 #include "oops/method.inline.hpp"
68 #include "oops/methodData.inline.hpp"
69 #include "oops/objArrayKlass.hpp"
70 #include "oops/objArrayOop.inline.hpp"
71 #include "oops/oop.inline.hpp"
72 #include "oops/typeArrayOop.inline.hpp"
73 #include "prims/jvmtiEnvBase.hpp"
74 #include "prims/resolvedMethodTable.hpp"
75 #include "prims/wbtestmethods/parserTests.hpp"
76 #include "prims/whitebox.inline.hpp"
77 #include "runtime/arguments.hpp"
78 #include "runtime/atomicAccess.hpp"
79 #include "runtime/deoptimization.hpp"
80 #include "runtime/fieldDescriptor.inline.hpp"
81 #include "runtime/flags/jvmFlag.hpp"
82 #include "runtime/flags/jvmFlagAccess.hpp"
83 #include "runtime/frame.inline.hpp"
84 #include "runtime/handles.inline.hpp"
85 #include "runtime/handshake.hpp"
86 #include "runtime/interfaceSupport.inline.hpp"
87 #include "runtime/javaCalls.hpp"
88 #include "runtime/javaThread.inline.hpp"
89 #include "runtime/jniHandles.inline.hpp"
90 #include "runtime/lockStack.hpp"
91 #include "runtime/os.hpp"
92 #include "runtime/stackFrameStream.inline.hpp"
93 #include "runtime/synchronizer.hpp"
94 #include "runtime/threadSMR.hpp"
95 #include "runtime/vframe.hpp"
96 #include "runtime/vm_version.hpp"
97 #include "services/memoryService.hpp"
98 #include "utilities/align.hpp"
99 #include "utilities/checkedCast.hpp"
100 #include "utilities/debug.hpp"
101 #include "utilities/elfFile.hpp"
102 #include "utilities/exceptions.hpp"
103 #include "utilities/macros.hpp"
104 #include "utilities/nativeCallStack.hpp"
105 #include "utilities/ostream.hpp"
106 #include "utilities/vmError.hpp"
107 #if INCLUDE_G1GC
108 #include "gc/g1/g1Arguments.hpp"
109 #include "gc/g1/g1CollectedHeap.inline.hpp"
110 #include "gc/g1/g1CollectorState.inline.hpp"
111 #include "gc/g1/g1ConcurrentMark.hpp"
112 #include "gc/g1/g1ConcurrentMarkThread.inline.hpp"
113 #include "gc/g1/g1HeapRegionManager.hpp"
114 #include "gc/g1/g1HeapRegionRemSet.inline.hpp"
115 #endif // INCLUDE_G1GC
116 #if INCLUDE_PARALLELGC
117 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
118 #endif // INCLUDE_PARALLELGC
119 #if INCLUDE_SERIALGC
120 #include "gc/serial/serialHeap.hpp"
121 #endif // INCLUDE_SERIALGC
122 #if INCLUDE_ZGC
123 #include "gc/z/zAddress.inline.hpp"
124 #include "gc/z/zHeap.inline.hpp"
125 #endif // INCLUDE_ZGC
126 #ifdef LINUX
127 #include "cgroupSubsystem_linux.hpp"
128 #include "os_linux.hpp"
129 #endif
130
131 #define CHECK_JNI_EXCEPTION_(env, value) \
132 do { \
133 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
134 THREAD->clear_pending_jni_exception_check(); \
135 if (HAS_PENDING_EXCEPTION) { \
136 return(value); \
137 } \
138 } while (0)
139
140 #define CHECK_JNI_EXCEPTION(env) \
141 do { \
142 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
143 THREAD->clear_pending_jni_exception_check(); \
144 if (HAS_PENDING_EXCEPTION) { \
145 return; \
146 } \
147 } while (0)
148
149 bool WhiteBox::_used = false;
150 volatile bool WhiteBox::compilation_locked = false;
151
152 class VM_WhiteBoxOperation : public VM_Operation {
153 public:
154 VM_WhiteBoxOperation() { }
155 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
156 bool allow_nested_vm_operations() const { return true; }
157 };
158
159
160 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
161 return (jlong)(void*)JNIHandles::resolve(obj);
162 WB_END
163
164 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
165 return heapOopSize;
166 WB_END
167
168 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
169 return (jint)os::vm_page_size();
170 WB_END
171
172 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
173 return os::vm_allocation_granularity();
174 WB_END
175
176 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
177 return os::large_page_size();
178 WB_END
179
180 WB_ENTRY(jstring, WB_PrintString(JNIEnv* env, jobject wb, jstring str, jint max_length))
181 ResourceMark rm(THREAD);
182 stringStream sb;
183 java_lang_String::print(JNIHandles::resolve(str), &sb, max_length);
184 oop result = java_lang_String::create_oop_from_str(sb.as_string(), THREAD);
185 return (jstring) JNIHandles::make_local(THREAD, result);
186 WB_END
187
188 WB_ENTRY(jint, WB_TakeLockAndHangInSafepoint(JNIEnv* env, jobject wb))
189 JavaThread* self = JavaThread::current();
190 // VMStatistic_lock is used to minimize interference with VM locking
191 MutexLocker mu(VMStatistic_lock);
192 VM_HangInSafepoint force_safepoint_stuck_op;
193 VMThread::execute(&force_safepoint_stuck_op);
194 ShouldNotReachHere();
195 return 0;
196 WB_END
197
198 WB_ENTRY(jlong, WB_GetMinimumJavaStackSize(JNIEnv* env, jobject o))
199 return os::get_minimum_java_stack_size();
200 WB_END
201
202 class WBIsKlassAliveClosure : public LockedClassesDo {
203 Symbol* _name;
204 int _count;
205 public:
206 WBIsKlassAliveClosure(Symbol* name) : _name(name), _count(0) {}
207
208 void do_klass(Klass* k) {
209 Symbol* ksym = k->name();
210 if (ksym->fast_compare(_name) == 0) {
211 _count++;
212 } else if (k->is_instance_klass()) {
213 // Need special handling for hidden classes because the JVM
214 // appends "+<hex-address>" to hidden class names.
215 InstanceKlass *ik = InstanceKlass::cast(k);
216 if (ik->is_hidden()) {
217 ResourceMark rm;
218 char* k_name = ksym->as_C_string();
219 // Find the first '+' char and truncate the string at that point.
220 // NOTE: This will not work correctly if the original hidden class
221 // name contains a '+'.
222 char* plus_char = strchr(k_name, '+');
223 if (plus_char != nullptr) {
224 *plus_char = 0;
225 char* c_name = _name->as_C_string();
226 if (strcmp(c_name, k_name) == 0) {
227 _count++;
228 }
229 }
230 }
231 }
232 }
233
234 int count() const {
235 return _count;
236 }
237 };
238
239 WB_ENTRY(jint, WB_CountAliveClasses(JNIEnv* env, jobject target, jstring name))
240 oop h_name = JNIHandles::resolve(name);
241 if (h_name == nullptr) {
242 return 0;
243 }
244 Symbol* sym = java_lang_String::as_symbol(h_name);
245 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
246
247 WBIsKlassAliveClosure closure(sym);
248 ClassLoaderDataGraph::classes_do(&closure);
249
250 // Return the count of alive classes with this name.
251 return closure.count();
252 WB_END
253
254 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
255 oop h_name = JNIHandles::resolve(name);
256 if (h_name == nullptr) {
257 return 0;
258 }
259 Symbol* sym = java_lang_String::as_symbol(h_name);
260 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
261 return (jint)sym->refcount();
262 WB_END
263
264
265 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
266 #if INCLUDE_JVMTI
267 ResourceMark rm;
268 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
269 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
270 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
271 assert(err == JVMTI_ERROR_NONE, "must not fail");
272 #endif
273 }
274 WB_END
275
276 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
277 #if INCLUDE_JVMTI
278 ResourceMark rm;
279 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
280 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
281 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
282 assert(err == JVMTI_ERROR_NONE, "must not fail");
283 #endif
284 }
285 WB_END
286
287
288 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
289 return (jlong)Arguments::max_heap_for_compressed_oops();
290 }
291 WB_END
292
293 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
294 tty->print_cr("Minimum heap %zu Initial heap %zu "
295 "Maximum heap %zu Space alignment %zu Heap alignment %zu",
296 MinHeapSize,
297 InitialHeapSize,
298 MaxHeapSize,
299 SpaceAlignment,
300 HeapAlignment);
301 }
302 WB_END
303
304 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
305 size_t granularity = os::vm_allocation_granularity();
306 ReservedHeapSpace rhs = HeapReserver::reserve(100 * granularity, granularity, os::vm_page_size(), nullptr);
307
308 // Check if constraints are complied
309 if (!( UseCompressedOops && rhs.is_reserved() &&
310 CompressedOops::base() != nullptr &&
311 CompressedOops::use_implicit_null_checks() )) {
312 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
313 "\tUseCompressedOops is %d\n"
314 "\trhs.base() is " PTR_FORMAT "\n"
315 "\tCompressedOops::base() is " PTR_FORMAT "\n"
316 "\tCompressedOops::use_implicit_null_checks() is %d",
317 UseCompressedOops,
318 p2i(rhs.base()),
319 p2i(CompressedOops::base()),
320 CompressedOops::use_implicit_null_checks());
321 return;
322 }
323
324 VirtualSpace vs;
325 vs.initialize(rhs, 50 * granularity);
326
327 tty->print_cr("Reading from no access area... ");
328 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
329 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
330 WB_END
331
332 WB_ENTRY(void, WB_DecodeNKlassAndAccessKlass(JNIEnv* env, jobject o, jint nKlass))
333 const narrowKlass nk = (narrowKlass)nKlass;
334 const Klass* const k = CompressedKlassPointers::decode_not_null_without_asserts(nKlass);
335 printf("WB_DecodeNKlassAndAccessKlass: nk %u k " PTR_FORMAT "\n", nk, p2i(k));
336 printf("Will attempt to crash now...\n");
337 fflush(stdout); // flush now - we will crash below
338 // Access k by calling a virtual function - will result in loading the vtable from *k
339 k->print_on(tty);
340 WB_END
341
342 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
343 size_t magnitude, size_t iterations) {
344 size_t granularity = os::vm_allocation_granularity();
345 ReservedHeapSpace rhs = HeapReserver::reserve(reserved_space_size * granularity, granularity, os::vm_page_size(), nullptr);
346 if (!rhs.is_reserved()) {
347 tty->print_cr("Failed to initialize ReservedSpace. Can't proceed.");
348 return 3;
349 }
350
351 VirtualSpace vs;
352 if (!vs.initialize(rhs, 0)) {
353 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
354 return 3;
355 }
356
357 int seed = os::random();
358 tty->print_cr("Random seed is %d", seed);
359
360 for (size_t i = 0; i < iterations; i++) {
361
362 // Whether we will shrink or grow
363 bool shrink = os::random() % 2L == 0;
364
365 // Get random delta to resize virtual space
366 size_t delta = (size_t)os::random() % magnitude;
367
368 // If we are about to shrink virtual space below zero, then expand instead
369 if (shrink && vs.committed_size() < delta) {
370 shrink = false;
371 }
372
373 // Resizing by delta
374 if (shrink) {
375 vs.shrink_by(delta);
376 } else {
377 // If expanding fails expand_by will silently return false
378 vs.expand_by(delta, true);
379 }
380 }
381 return 0;
382 }
383
384 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
385 jlong reserved_space_size, jlong magnitude, jlong iterations))
386 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
387 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
388 iterations);
389 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
390 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
391 return 1;
392 }
393
394 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
395 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
396 if (sizeof(size_t) < sizeof(jlong)) {
397 jlong size_t_max_value = (jlong)SIZE_MAX;
398 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
399 || iterations > size_t_max_value) {
400 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
401 return 2;
402 }
403 }
404
405 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
406 (size_t) magnitude, (size_t) iterations);
407 WB_END
408
409 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
410 return GCConfig::is_gc_supported((CollectedHeap::Name)name);
411 WB_END
412
413 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
414 return GCConfig::is_gc_selected((CollectedHeap::Name)name);
415 WB_END
416
417 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
418 return GCConfig::is_gc_selected_ergonomically();
419 WB_END
420
421 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
422 oop p = JNIHandles::resolve(obj);
423 #if INCLUDE_G1GC
424 if (UseG1GC) {
425 G1CollectedHeap* g1h = G1CollectedHeap::heap();
426 const G1HeapRegion* hr = g1h->heap_region_containing(p);
427 return hr->is_old_or_humongous();
428 }
429 #endif
430 #if INCLUDE_PARALLELGC
431 if (UseParallelGC) {
432 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
433 return !psh->is_in_young(p);
434 }
435 #endif
436 #if INCLUDE_ZGC
437 if (UseZGC) {
438 return ZHeap::heap()->is_old(to_zaddress(p));
439 }
440 #endif
441 #if INCLUDE_SHENANDOAHGC
442 if (UseShenandoahGC) {
443 ShenandoahHeap* sh = ShenandoahHeap::heap();
444 return sh->mode()->is_generational() ? sh->is_in_old(p) : sh->is_in(p);
445 }
446 #endif
447 #if INCLUDE_SERIALGC
448 if (UseSerialGC) {
449 return !SerialHeap::heap()->is_in_young(p);
450 }
451 #endif
452 ShouldNotReachHere();
453 return false;
454 WB_END
455
456 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
457 oop p = JNIHandles::resolve(obj);
458 return p->size() * HeapWordSize;
459 WB_END
460
461 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
462 return (jlong)SpaceAlignment;
463 WB_END
464
465 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
466 return (jlong)HeapAlignment;
467 WB_END
468
469 WB_ENTRY(jboolean, WB_SupportsConcurrentGCBreakpoints(JNIEnv* env, jobject o))
470 return Universe::heap()->supports_concurrent_gc_breakpoints();
471 WB_END
472
473 WB_ENTRY(void, WB_ConcurrentGCAcquireControl(JNIEnv* env, jobject o))
474 ConcurrentGCBreakpoints::acquire_control();
475 WB_END
476
477 WB_ENTRY(void, WB_ConcurrentGCReleaseControl(JNIEnv* env, jobject o))
478 ConcurrentGCBreakpoints::release_control();
479 WB_END
480
481 WB_ENTRY(void, WB_ConcurrentGCRunToIdle(JNIEnv* env, jobject o))
482 ConcurrentGCBreakpoints::run_to_idle();
483 WB_END
484
485 WB_ENTRY(jboolean, WB_ConcurrentGCRunTo(JNIEnv* env, jobject o, jobject at))
486 Handle h_name(THREAD, JNIHandles::resolve(at));
487 ResourceMark rm;
488 const char* c_name = java_lang_String::as_utf8_string(h_name());
489 return ConcurrentGCBreakpoints::run_to(c_name);
490 WB_END
491
492 WB_ENTRY(jboolean, WB_ShipDebugInfoFull(JNIEnv* env, jobject o))
493 #if defined(SHIP_DEBUGINFO_FULL)
494 return true;
495 #else
496 return false;
497 #endif
498 WB_END
499
500 WB_ENTRY(jboolean, WB_ShipDebugInfoPublic(JNIEnv* env, jobject o))
501 #if defined(SHIP_DEBUGINFO_PUBLIC)
502 return true;
503 #else
504 return false;
505 #endif
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->collector_state()->is_in_concurrent_cycle();
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, int comp_level, methodHandle& mh) {
854 if (comp == nullptr) {
855 return true;
856 }
857 CompilerDirectiveMatcher matcher(mh, comp_level);
858 return matcher.directive_set()->ExcludeOption;
859 }
860
861 static bool can_be_compiled_at_level(methodHandle& mh, jboolean is_osr, int level) {
862 if (is_osr) {
863 return CompilationPolicy::can_be_osr_compiled(mh, level);
864 } else {
865 return CompilationPolicy::can_be_compiled(mh, level);
866 }
867 }
868
869 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
870 if (method == nullptr || comp_level > CompilationPolicy::highest_compile_level()) {
871 return false;
872 }
873 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
874 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
875 MutexLocker mu(Compile_lock);
876 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
877
878 // The ExcludeOption directive is evaluated lazily upon compilation attempt. If a method was not tried to be compiled by
879 // a compiler, yet, the method object is not set to be not compilable by that compiler. Thus, evaluate the compiler directive
880 // to exclude a compilation of 'method'.
881 if (comp_level == CompLevel_any) {
882 // Both compilers could have ExcludeOption set. Check all combinations.
883 bool excluded_c1 = is_excluded_for_compiler(CompileBroker::compiler1(), CompLevel_simple, mh)
884 && is_excluded_for_compiler(CompileBroker::compiler1(), CompLevel_limited_profile, mh)
885 && is_excluded_for_compiler(CompileBroker::compiler1(), CompLevel_full_profile, mh);
886 bool excluded_c2 = is_excluded_for_compiler(CompileBroker::compiler2(), CompLevel_full_optimization, 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 || can_be_compiled_at_level(mh, is_osr, CompLevel_limited_profile)
899 || can_be_compiled_at_level(mh, is_osr, CompLevel_full_profile);
900 }
901 } else if (comp_level > CompLevel_none && is_excluded_for_compiler(CompileBroker::compiler((int)comp_level), comp_level, mh)) {
902 // Compilation of 'method' excluded by compiler used for 'comp_level'.
903 return false;
904 }
905
906 return can_be_compiled_at_level(mh, is_osr, (int)comp_level);
907 WB_END
908
909 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
910 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
911 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
912 MutexLocker mu(Compile_lock);
913 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
914 return mh->queued_for_compilation();
915 WB_END
916
917 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
918 if (compLevel < CompLevel_none || compLevel > CompilationPolicy::highest_compile_level()) {
919 return false; // Intrinsic is not available on a non-existent compilation level.
920 }
921 AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
922 if (comp == nullptr) {
923 // Could have compLevel == 0, or !TieredCompilation and incompatible values of TieredStopAtLevel and compLevel.
924 tty->print_cr("WB error: no compiler for requested compilation level %d", compLevel);
925 return false;
926 }
927
928 jmethodID method_id, compilation_context_id;
929 method_id = reflected_method_to_jmid(thread, env, method);
930 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
931 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
932
933 if (compilation_context != nullptr) {
934 compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
935 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
936 methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
937 CompilerDirectiveMatcher matcher(cch, compLevel);
938 return comp->is_intrinsic_available(mh, matcher.directive_set());
939 } else {
940 // Calling with null matches default directive
941 CompilerDirectiveMatcher default_directive(comp);
942 return comp->is_intrinsic_available(mh, default_directive.directive_set());
943 }
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 CompilerDirectiveMatcher matcher(mh, comp_level);
1118 bool is_blocking = !matcher.directive_set()->BackgroundCompilationOption;
1119
1120 // Compile method and check result
1121 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh->invocation_count(), CompileTask::Reason_Whitebox, CHECK_false);
1122 MutexLocker mu(THREAD, Compile_lock);
1123 bool is_queued = mh->queued_for_compilation();
1124 if ((!is_blocking && is_queued) || nm != nullptr) {
1125 return true;
1126 }
1127 // Check code again because compilation may be finished before Compile_lock is acquired.
1128 if (bci == InvocationEntryBci) {
1129 nmethod* code = mh->code();
1130 if (code != nullptr) {
1131 return true;
1132 }
1133 } else if (mh->lookup_osr_nmethod_for(bci, comp_level, false) != nullptr) {
1134 return true;
1135 }
1136 tty->print("WB error: failed to%s compile at level %d method ", is_blocking ? " blocking" : "", comp_level);
1137 mh->print_short_name(tty);
1138 tty->cr();
1139 if (is_blocking && is_queued) {
1140 tty->print_cr("WB error: blocking compilation is still in queue!");
1141 }
1142 return false;
1143 }
1144
1145 size_t WhiteBox::get_in_use_monitor_count() {
1146 return ObjectSynchronizer::_in_use_list.count();
1147 }
1148
1149 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1150 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1151 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1152 return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1153 WB_END
1154
1155 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1156 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1157 Method* clinit = ik->class_initializer();
1158 if (clinit == nullptr || clinit->method_holder()->is_not_initialized()) {
1159 return false;
1160 }
1161 return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1162 WB_END
1163
1164 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1165 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1166 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1167
1168 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1169 CompilerDirectiveMatcher matcher(mh, comp_level);
1170 return matcher.directive_set()->PrintAssemblyOption;
1171 WB_END
1172
1173 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1174 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1175 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1176
1177 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1178
1179 ResourceMark rm(THREAD);
1180 const char* error_msg = nullptr;
1181 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1182 InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1183
1184 if (m == nullptr) {
1185 assert(error_msg != nullptr, "Always have an error message");
1186 tty->print_cr("Got error: %s", error_msg);
1187 return -1; // Pattern failed
1188 }
1189
1190 // Pattern works - now check if it matches
1191 int result;
1192 if (m->match(mh, InlineMatcher::force_inline)) {
1193 result = 2; // Force inline match
1194 } else if (m->match(mh, InlineMatcher::dont_inline)) {
1195 result = 1; // Dont inline match
1196 } else {
1197 result = 0; // No match
1198 }
1199 delete m;
1200 return result;
1201 WB_END
1202
1203 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1204 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1205 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1206
1207 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1208
1209 ResourceMark rm;
1210 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1211
1212 const char* error_msg = nullptr;
1213
1214 BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg, false);
1215 if (m == nullptr) {
1216 assert(error_msg != nullptr, "Must have error_msg");
1217 tty->print_cr("Got error: %s", error_msg);
1218 return -1;
1219 }
1220
1221 // Pattern works - now check if it matches
1222 int result = m->matches(mh);
1223 delete m;
1224 assert(result == 0 || result == 1, "Result out of range");
1225 return result;
1226 WB_END
1227
1228 WB_ENTRY(void, WB_MarkMethodProfiled(JNIEnv* env, jobject o, jobject method))
1229 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1230 CHECK_JNI_EXCEPTION(env);
1231 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1232
1233 MethodData* mdo = mh->method_data();
1234 if (mdo == nullptr) {
1235 Method::build_profiling_method_data(mh, CHECK_AND_CLEAR);
1236 mdo = mh->method_data();
1237 }
1238 mdo->init();
1239 InvocationCounter* icnt = mdo->invocation_counter();
1240 InvocationCounter* bcnt = mdo->backedge_counter();
1241 // set i-counter according to CompilationPolicy::is_method_profiled
1242 icnt->set(Tier4MinInvocationThreshold);
1243 bcnt->set(Tier4CompileThreshold);
1244 WB_END
1245
1246 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1247 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1248 CHECK_JNI_EXCEPTION(env);
1249 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1250 MutexLocker mu(THREAD, Compile_lock);
1251 MethodData* mdo = mh->method_data();
1252 MethodCounters* mcs = mh->method_counters();
1253
1254 if (mdo != nullptr) {
1255 mdo->init();
1256 ResourceMark rm(THREAD);
1257 int arg_size = mdo->method()->size_of_parameters();
1258 for (int i = 0; i < arg_size; i++) {
1259 mdo->set_arg_modified(i, 0);
1260 }
1261 mdo->clean_method_data(/*always_clean*/true);
1262 }
1263
1264 mh->clear_is_not_c1_compilable();
1265 mh->clear_is_not_c2_compilable();
1266 mh->clear_is_not_c2_osr_compilable();
1267 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1268 if (mcs != nullptr) {
1269 mcs->clear_counters();
1270 }
1271 WB_END
1272
1273 template <typename T, int type_enum>
1274 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1275 if (name == nullptr) {
1276 return false;
1277 }
1278 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1279 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1280 CHECK_JNI_EXCEPTION_(env, false);
1281 const JVMFlag* flag = JVMFlag::find_declared_flag(flag_name);
1282 JVMFlag::Error result = JVMFlagAccess::get<T, type_enum>(flag, value);
1283 env->ReleaseStringUTFChars(name, flag_name);
1284 return (result == JVMFlag::SUCCESS);
1285 }
1286
1287 template <typename T, int type_enum>
1288 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1289 if (name == nullptr) {
1290 return false;
1291 }
1292 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1293 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1294 CHECK_JNI_EXCEPTION_(env, false);
1295 JVMFlag* flag = JVMFlag::find_flag(flag_name);
1296 JVMFlag::Error result = JVMFlagAccess::set<T, type_enum>(flag, value, JVMFlagOrigin::INTERNAL);
1297 env->ReleaseStringUTFChars(name, flag_name);
1298 return (result == JVMFlag::SUCCESS);
1299 }
1300
1301 template <typename T>
1302 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1303 ResourceMark rm(thread);
1304 jclass clazz = env->FindClass(name->as_C_string());
1305 CHECK_JNI_EXCEPTION_(env, nullptr);
1306 jmethodID methodID = env->GetStaticMethodID(clazz,
1307 vmSymbols::valueOf_name()->as_C_string(),
1308 sig->as_C_string());
1309 CHECK_JNI_EXCEPTION_(env, nullptr);
1310 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1311 CHECK_JNI_EXCEPTION_(env, nullptr);
1312 return result;
1313 }
1314
1315 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1316 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1317 }
1318 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1319 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1320 }
1321 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1322 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1323 }
1324 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1325 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1326 }*/
1327 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1328 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1329 }
1330
1331 static const JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1332 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1333 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1334 CHECK_JNI_EXCEPTION_(env, nullptr);
1335 const JVMFlag* result = JVMFlag::find_declared_flag(flag_name);
1336 env->ReleaseStringUTFChars(name, flag_name);
1337 return result;
1338 }
1339
1340 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1341 const JVMFlag* flag = getVMFlag(thread, env, name);
1342 return (flag != nullptr) && flag->is_constant_in_binary();
1343 WB_END
1344
1345 WB_ENTRY(jboolean, WB_IsDefaultVMFlag(JNIEnv* env, jobject o, jstring name))
1346 const JVMFlag* flag = getVMFlag(thread, env, name);
1347 return (flag != nullptr) && flag->is_default();
1348 WB_END
1349
1350 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1351 const JVMFlag* flag = getVMFlag(thread, env, name);
1352 return (flag != nullptr) && !(flag->is_unlocked() || flag->is_unlocker());
1353 WB_END
1354
1355 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1356 bool result;
1357 if (GetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result)) {
1358 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1359 return booleanBox(thread, env, result);
1360 }
1361 return nullptr;
1362 WB_END
1363
1364 template <typename T, int type_enum>
1365 jobject GetVMFlag_longBox(JNIEnv* env, JavaThread* thread, jstring name) {
1366 T result;
1367 if (GetVMFlag <T, type_enum> (thread, env, name, &result)) {
1368 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1369 return longBox(thread, env, result);
1370 }
1371 return nullptr;
1372 }
1373
1374 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1375 return GetVMFlag_longBox<JVM_FLAG_TYPE(int)>(env, thread, name);
1376 WB_END
1377
1378 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1379 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint)>(env, thread, name);
1380 WB_END
1381
1382 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1383 return GetVMFlag_longBox<JVM_FLAG_TYPE(intx)>(env, thread, name);
1384 WB_END
1385
1386 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1387 return GetVMFlag_longBox<JVM_FLAG_TYPE(uintx)>(env, thread, name);
1388 WB_END
1389
1390 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1391 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint64_t)>(env, thread, name);
1392 WB_END
1393
1394 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1395 return GetVMFlag_longBox<JVM_FLAG_TYPE(size_t)>(env, thread, name);
1396 WB_END
1397
1398 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1399 double result;
1400 if (GetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result)) {
1401 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1402 return doubleBox(thread, env, result);
1403 }
1404 return nullptr;
1405 WB_END
1406
1407 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1408 ccstr ccstrResult;
1409 if (GetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &ccstrResult)) {
1410 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1411 jstring result = env->NewStringUTF(ccstrResult);
1412 CHECK_JNI_EXCEPTION_(env, nullptr);
1413 return result;
1414 }
1415 return nullptr;
1416 WB_END
1417
1418 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1419 bool result = value == JNI_TRUE ? true : false;
1420 SetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result);
1421 WB_END
1422
1423 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1424 int result = checked_cast<int>(value);
1425 SetVMFlag <JVM_FLAG_TYPE(int)> (thread, env, name, &result);
1426 WB_END
1427
1428 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1429 uint result = checked_cast<uint>(value);
1430 SetVMFlag <JVM_FLAG_TYPE(uint)> (thread, env, name, &result);
1431 WB_END
1432
1433 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1434 intx result = value;
1435 SetVMFlag <JVM_FLAG_TYPE(intx)> (thread, env, name, &result);
1436 WB_END
1437
1438 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1439 uintx result = value;
1440 SetVMFlag <JVM_FLAG_TYPE(uintx)> (thread, env, name, &result);
1441 WB_END
1442
1443 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1444 uint64_t result = value;
1445 SetVMFlag <JVM_FLAG_TYPE(uint64_t)> (thread, env, name, &result);
1446 WB_END
1447
1448 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1449 size_t result = value;
1450 SetVMFlag <JVM_FLAG_TYPE(size_t)> (thread, env, name, &result);
1451 WB_END
1452
1453 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1454 double result = value;
1455 SetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result);
1456 WB_END
1457
1458 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1459 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1460 const char* ccstrValue;
1461 if (value == nullptr) {
1462 ccstrValue = nullptr;
1463 }
1464 else {
1465 ccstrValue = env->GetStringUTFChars(value, nullptr);
1466 CHECK_JNI_EXCEPTION(env);
1467 }
1468 {
1469 ccstr param = ccstrValue;
1470 ThreadInVMfromNative ttvfn(thread); // back to VM
1471 if (SetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, ¶m)) {
1472 assert(param == nullptr, "old value is freed automatically and not returned");
1473 }
1474 }
1475 if (value != nullptr) {
1476 env->ReleaseStringUTFChars(value, ccstrValue);
1477 }
1478 WB_END
1479
1480 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1481 WhiteBox::compilation_locked = true;
1482 WB_END
1483
1484 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1485 MonitorLocker mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1486 WhiteBox::compilation_locked = false;
1487 mo.notify_all();
1488 WB_END
1489
1490 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1491 ResourceMark rm(THREAD);
1492 int len;
1493 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1494 return (StringTable::lookup(name, len) != nullptr);
1495 WB_END
1496
1497 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1498 Universe::heap()->collect(GCCause::_wb_full_gc);
1499 WB_END
1500
1501 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1502 Universe::heap()->collect(GCCause::_wb_young_gc);
1503 WB_END
1504
1505 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1506 // static+volatile in order to force the read to happen
1507 // (not be eliminated by the compiler)
1508 static char c;
1509 static volatile char* p;
1510
1511 p = os::reserve_memory(os::vm_allocation_granularity(), mtTest);
1512 if (p == nullptr) {
1513 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1514 }
1515
1516 c = *p;
1517 WB_END
1518
1519 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1520 const char* features = VM_Version::cpu_info_string();
1521 ThreadToNativeFromVM ttn(thread);
1522 jstring features_string = env->NewStringUTF(features);
1523
1524 CHECK_JNI_EXCEPTION_(env, nullptr);
1525
1526 return features_string;
1527 WB_END
1528
1529 CodeBlobType WhiteBox::get_blob_type(const CodeBlob* code) {
1530 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1531 return CodeCache::get_code_heap(code)->code_blob_type();
1532 }
1533
1534 CodeHeap* WhiteBox::get_code_heap(CodeBlobType blob_type) {
1535 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1536 return CodeCache::get_code_heap(blob_type);
1537 }
1538
1539 struct CodeBlobStub {
1540 CodeBlobStub(const CodeBlob* blob) :
1541 name(os::strdup(blob->name())),
1542 size(blob->size()),
1543 blob_type(static_cast<jint>(WhiteBox::get_blob_type(blob))),
1544 address((jlong) blob),
1545 code_begin((jlong) blob->code_begin()),
1546 is_nmethod((jboolean) blob->is_nmethod()) { }
1547 ~CodeBlobStub() { os::free((void*) name); }
1548 const char* const name;
1549 const jint size;
1550 const jint blob_type;
1551 const jlong address;
1552 const jlong code_begin;
1553 const jboolean is_nmethod;
1554 };
1555
1556 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1557 ResourceMark rm;
1558 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1559 CHECK_JNI_EXCEPTION_(env, nullptr);
1560 jobjectArray result = env->NewObjectArray(6, clazz, nullptr);
1561
1562 jstring name = env->NewStringUTF(cb->name);
1563 CHECK_JNI_EXCEPTION_(env, nullptr);
1564 env->SetObjectArrayElement(result, 0, name);
1565
1566 jobject obj = integerBox(thread, env, cb->size);
1567 CHECK_JNI_EXCEPTION_(env, nullptr);
1568 env->SetObjectArrayElement(result, 1, obj);
1569
1570 obj = integerBox(thread, env, cb->blob_type);
1571 CHECK_JNI_EXCEPTION_(env, nullptr);
1572 env->SetObjectArrayElement(result, 2, obj);
1573
1574 obj = longBox(thread, env, cb->address);
1575 CHECK_JNI_EXCEPTION_(env, nullptr);
1576 env->SetObjectArrayElement(result, 3, obj);
1577
1578 obj = longBox(thread, env, cb->code_begin);
1579 CHECK_JNI_EXCEPTION_(env, nullptr);
1580 env->SetObjectArrayElement(result, 4, obj);
1581
1582 obj = booleanBox(thread, env, cb->is_nmethod);
1583 CHECK_JNI_EXCEPTION_(env, nullptr);
1584 env->SetObjectArrayElement(result, 5, obj);
1585
1586 return result;
1587 }
1588
1589 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1590 ResourceMark rm(THREAD);
1591 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1592 CHECK_JNI_EXCEPTION_(env, nullptr);
1593 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1594 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1595 jobjectArray result = nullptr;
1596 if (code == nullptr) {
1597 return result;
1598 }
1599 int comp_level = code->comp_level();
1600 int insts_size = code->insts_size();
1601
1602 ThreadToNativeFromVM ttn(thread);
1603 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1604 CHECK_JNI_EXCEPTION_(env, nullptr);
1605 result = env->NewObjectArray(5, clazz, nullptr);
1606 if (result == nullptr) {
1607 return result;
1608 }
1609
1610 CodeBlobStub stub(code);
1611 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1612 CHECK_JNI_EXCEPTION_(env, nullptr);
1613 env->SetObjectArrayElement(result, 0, codeBlob);
1614
1615 jobject level = integerBox(thread, env, comp_level);
1616 CHECK_JNI_EXCEPTION_(env, nullptr);
1617 env->SetObjectArrayElement(result, 1, level);
1618
1619 jbyteArray insts = env->NewByteArray(insts_size);
1620 CHECK_JNI_EXCEPTION_(env, nullptr);
1621 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1622 env->SetObjectArrayElement(result, 2, insts);
1623
1624 jobject id = integerBox(thread, env, code->compile_id());
1625 CHECK_JNI_EXCEPTION_(env, nullptr);
1626 env->SetObjectArrayElement(result, 3, id);
1627
1628 jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1629 CHECK_JNI_EXCEPTION_(env, nullptr);
1630 env->SetObjectArrayElement(result, 4, entry_point);
1631
1632 return result;
1633 WB_END
1634
1635 WB_ENTRY(void, WB_RelocateNMethodFromMethod(JNIEnv* env, jobject o, jobject method, jint blob_type))
1636 ResourceMark rm(THREAD);
1637 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1638 CHECK_JNI_EXCEPTION(env);
1639 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1640 nmethod* code = mh->code();
1641 if (code != nullptr) {
1642 MutexLocker ml_Compile_lock(Compile_lock);
1643 CompiledICLocker ic_locker(code);
1644 MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1645 code->relocate(static_cast<CodeBlobType>(blob_type));
1646 }
1647 WB_END
1648
1649 WB_ENTRY(void, WB_RelocateNMethodFromAddr(JNIEnv* env, jobject o, jlong addr, jint blob_type))
1650 ResourceMark rm(THREAD);
1651 CHECK_JNI_EXCEPTION(env);
1652 void* address = (void*) addr;
1653
1654 if (address == nullptr) {
1655 return;
1656 }
1657
1658 MutexLocker ml_Compile_lock(Compile_lock);
1659 MutexLocker ml_CompiledIC_lock(CompiledIC_lock, Mutex::_no_safepoint_check_flag);
1660 MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1661
1662 // Verify that nmethod address is still valid
1663 CodeBlob* blob = CodeCache::find_blob(address);
1664 if (blob != nullptr && blob->is_nmethod()) {
1665 nmethod* code = blob->as_nmethod();
1666 if (code->is_in_use() && !code->is_unloading()) {
1667 CompiledICLocker ic_locker(code);
1668 code->relocate(static_cast<CodeBlobType>(blob_type));
1669 }
1670 }
1671 WB_END
1672
1673 CodeBlob* WhiteBox::allocate_code_blob(int size, CodeBlobType blob_type) {
1674 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1675 BufferBlob* blob;
1676 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1677 if (full_size < size) {
1678 full_size += align_up(size - full_size, oopSize);
1679 }
1680 {
1681 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1682 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1683 if (blob != nullptr) {
1684 ::new (blob) BufferBlob("WB::DummyBlob", CodeBlobKind::Buffer, full_size);
1685 }
1686 }
1687 // Track memory usage statistic after releasing CodeCache_lock
1688 MemoryService::track_code_cache_memory_usage();
1689 return blob;
1690 }
1691
1692 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1693 if (size < 0) {
1694 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1695 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1696 }
1697 return (jlong) WhiteBox::allocate_code_blob(size, static_cast<CodeBlobType>(blob_type));
1698 WB_END
1699
1700 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1701 if (addr == 0) {
1702 return;
1703 }
1704 BufferBlob::free((BufferBlob*) addr);
1705 WB_END
1706
1707 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1708 ResourceMark rm;
1709 GrowableArray<CodeBlobStub*> blobs;
1710 {
1711 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1712 CodeHeap* heap = WhiteBox::get_code_heap(static_cast<CodeBlobType>(blob_type));
1713 if (heap == nullptr) {
1714 return nullptr;
1715 }
1716 for (CodeBlob* cb = (CodeBlob*) heap->first();
1717 cb != nullptr; cb = (CodeBlob*) heap->next(cb)) {
1718 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1719 new (stub) CodeBlobStub(cb);
1720 blobs.append(stub);
1721 }
1722 }
1723 ThreadToNativeFromVM ttn(thread);
1724 jobjectArray result = nullptr;
1725 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1726 CHECK_JNI_EXCEPTION_(env, nullptr);
1727 result = env->NewObjectArray(blobs.length(), clazz, nullptr);
1728 CHECK_JNI_EXCEPTION_(env, nullptr);
1729 if (result == nullptr) {
1730 return result;
1731 }
1732 int i = 0;
1733 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1734 it != blobs.end(); ++it) {
1735 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1736 CHECK_JNI_EXCEPTION_(env, nullptr);
1737 env->SetObjectArrayElement(result, i, obj);
1738 CHECK_JNI_EXCEPTION_(env, nullptr);
1739 ++i;
1740 }
1741 return result;
1742 WB_END
1743
1744 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1745 return CompileBroker::get_compilation_activity_mode();
1746 WB_END
1747
1748 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1749 if (addr == 0) {
1750 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1751 "WB_GetCodeBlob: addr is null");
1752 }
1753 ThreadToNativeFromVM ttn(thread);
1754 CodeBlobStub stub((CodeBlob*) addr);
1755 return codeBlob2objectArray(thread, env, &stub);
1756 WB_END
1757
1758 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1759 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1760 CHECK_JNI_EXCEPTION_(env, 0);
1761 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1762 return (jlong) mh->method_data();
1763 WB_END
1764
1765 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1766 return (jlong) thread->stack_size();
1767 WB_END
1768
1769 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1770 return (jlong) thread->stack_overflow_state()->stack_available(
1771 os::current_stack_pointer()) - (jlong)StackOverflow::stack_shadow_zone_size();
1772 WB_END
1773
1774
1775 int WhiteBox::array_bytes_to_length(size_t bytes) {
1776 return Array<u1>::bytes_to_length(bytes);
1777 }
1778
1779 ///////////////
1780 // MetaspaceTestContext and MetaspaceTestArena
1781 WB_ENTRY(jlong, WB_CreateMetaspaceTestContext(JNIEnv* env, jobject wb, jlong commit_limit, jlong reserve_limit))
1782 assert(is_aligned(commit_limit, BytesPerWord),
1783 "WB_CreateMetaspaceTestContext: commit_limit is not a multiple of the system word byte size");
1784 assert(is_aligned(reserve_limit, BytesPerWord),
1785 "WB_CreateMetaspaceTestContext: reserve_limit is not a multiple of the system word byte size");
1786 metaspace::MetaspaceTestContext* context =
1787 new metaspace::MetaspaceTestContext("whitebox-metaspace-context", (size_t) commit_limit / BytesPerWord,
1788 (size_t) reserve_limit / BytesPerWord);
1789 return (jlong)p2i(context);
1790 WB_END
1791
1792 WB_ENTRY(void, WB_DestroyMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1793 delete (metaspace::MetaspaceTestContext*) context;
1794 WB_END
1795
1796 WB_ENTRY(void, WB_PurgeMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1797 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1798 context0->purge_area();
1799 WB_END
1800
1801 WB_ENTRY(void, WB_PrintMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1802 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1803 context0->print_on(tty);
1804 WB_END
1805
1806 WB_ENTRY(jlong, WB_GetTotalCommittedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1807 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1808 return (jlong)context0->committed_words() * BytesPerWord;
1809 WB_END
1810
1811 WB_ENTRY(jlong, WB_GetTotalUsedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1812 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1813 return (jlong)context0->used_words() * BytesPerWord;
1814 WB_END
1815
1816 WB_ENTRY(jlong, WB_CreateArenaInTestContext(JNIEnv* env, jobject wb, jlong context, jboolean is_micro))
1817 const Metaspace::MetaspaceType type = is_micro ? Metaspace::ClassMirrorHolderMetaspaceType : Metaspace::StandardMetaspaceType;
1818 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1819 return (jlong)p2i(context0->create_arena(type));
1820 WB_END
1821
1822 WB_ENTRY(void, WB_DestroyMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena))
1823 delete (metaspace::MetaspaceTestArena*) arena;
1824 WB_END
1825
1826 WB_ENTRY(jlong, WB_AllocateFromMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong size))
1827 assert(is_aligned(size, BytesPerWord),
1828 "WB_AllocateFromMetaspaceTestArena: size is not a multiple of the system word byte size");
1829 metaspace::MetaspaceTestArena *arena0 = (metaspace::MetaspaceTestArena *)arena;
1830 MetaWord *p = arena0->allocate((size_t) size / BytesPerWord);
1831 return (jlong)p2i(p);
1832 WB_END
1833
1834 WB_ENTRY(void, WB_DeallocateToMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong p, jlong size))
1835 assert(is_aligned(size, BytesPerWord),
1836 "WB_DeallocateToMetaspaceTestArena: size is not a multiple of the system word byte size");
1837 metaspace::MetaspaceTestArena* arena0 = (metaspace::MetaspaceTestArena*) arena;
1838 arena0->deallocate((MetaWord*)p, (size_t) size / BytesPerWord);
1839 WB_END
1840
1841 WB_ENTRY(jlong, WB_GetMaxMetaspaceAllocationSize(JNIEnv* env, jobject wb))
1842 return (jlong) Metaspace::max_allocation_word_size() * BytesPerWord;
1843 WB_END
1844
1845 WB_ENTRY(jlong, WB_WordSize(JNIEnv* env))
1846 return (jlong)BytesPerWord;
1847 WB_END
1848
1849 WB_ENTRY(jlong, WB_RootChunkWordSize(JNIEnv* env))
1850 return (jlong)Metaspace::reserve_alignment_words();
1851 WB_END
1852
1853 WB_ENTRY(jboolean, WB_IsStaticallyLinked(JNIEnv* env, jobject wb))
1854 return JVM_IsStaticallyLinked();
1855 WB_END
1856
1857 //////////////
1858
1859 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1860 if (size < 0) {
1861 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1862 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1863 }
1864
1865 oop class_loader_oop = JNIHandles::resolve(class_loader);
1866 ClassLoaderData* cld = class_loader_oop != nullptr
1867 ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1868 : ClassLoaderData::the_null_class_loader_data();
1869
1870 void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1871
1872 return (jlong)(uintptr_t)metadata;
1873 WB_END
1874
1875 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1876 jstring version, jstring location, jobjectArray packages))
1877 Handle h_module (THREAD, JNIHandles::resolve(module));
1878 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1879 WB_END
1880
1881 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1882 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1883 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1884 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1885 WB_END
1886
1887 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1888 Handle h_module (THREAD, JNIHandles::resolve(module));
1889 Modules::add_module_exports_to_all_unnamed(h_module, package, CHECK);
1890 WB_END
1891
1892 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1893 Handle h_module (THREAD, JNIHandles::resolve(module));
1894 Modules::add_module_exports(h_module, package, Handle(), CHECK);
1895 WB_END
1896
1897 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1898 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1899 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1900 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1901 WB_END
1902
1903 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1904 if (inc < 0) {
1905 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1906 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1907 }
1908
1909 jlong max_size_t = (jlong) ((size_t) -1);
1910 if (inc > max_size_t) {
1911 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1912 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1913 }
1914
1915 size_t new_cap_until_GC = 0;
1916 size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1917 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1918 if (!success) {
1919 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1920 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1921 "due to contention with another thread");
1922 }
1923 return (jlong) new_cap_until_GC;
1924 WB_END
1925
1926 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1927 return (jlong) MetaspaceGC::capacity_until_GC();
1928 WB_END
1929
1930 // The function is only valid when CDS is available.
1931 WB_ENTRY(jlong, WB_AOTMetaspaceRegionAlignment(JNIEnv* env, jobject wb))
1932 #if INCLUDE_CDS
1933 return (jlong)AOTMetaspace::core_region_alignment();
1934 #else
1935 ShouldNotReachHere();
1936 return 0L;
1937 #endif
1938 WB_END
1939
1940 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1941 oop obj_oop = JNIHandles::resolve(obj);
1942 return (jboolean) obj_oop->mark().has_monitor();
1943 WB_END
1944
1945 WB_ENTRY(jboolean, WB_IsAsanEnabled(JNIEnv* env))
1946 return (jboolean) WhiteBox::is_asan_enabled();
1947 WB_END
1948
1949 WB_ENTRY(jboolean, WB_IsUbsanEnabled(JNIEnv* env))
1950 return (jboolean) WhiteBox::is_ubsan_enabled();
1951 WB_END
1952
1953 WB_ENTRY(jlong, WB_getInUseMonitorCount(JNIEnv* env, jobject wb))
1954 return (jlong) WhiteBox::get_in_use_monitor_count();
1955 WB_END
1956
1957 WB_ENTRY(jint, WB_getLockStackCapacity(JNIEnv* env))
1958 return (jint) LockStack::CAPACITY;
1959 WB_END
1960
1961 WB_ENTRY(jboolean, WB_supportsRecursiveFastLocking(JNIEnv* env))
1962 return (jboolean) VM_Version::supports_recursive_fast_locking();
1963 WB_END
1964
1965 WB_ENTRY(jboolean, WB_DeflateIdleMonitors(JNIEnv* env, jobject wb))
1966 log_info(monitorinflation)("WhiteBox initiated DeflateIdleMonitors");
1967 return ObjectSynchronizer::request_deflate_idle_monitors_from_wb();
1968 WB_END
1969
1970 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1971 VM_ForceSafepoint force_safepoint_op;
1972 VMThread::execute(&force_safepoint_op);
1973 WB_END
1974
1975 WB_ENTRY(void, WB_ForceClassLoaderStatsSafepoint(JNIEnv* env, jobject wb))
1976 nullStream dev_null;
1977 ClassLoaderStatsVMOperation force_op(&dev_null);
1978 VMThread::execute(&force_op);
1979 WB_END
1980
1981 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1982 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1983 return (jlong) ik->constants();
1984 WB_END
1985
1986 WB_ENTRY(jobjectArray, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass klass))
1987 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1988 objArrayOop resolved_refs= ik->constants()->resolved_references();
1989 return (jobjectArray)JNIHandles::make_local(THREAD, resolved_refs);
1990 WB_END
1991
1992 WB_ENTRY(jint, WB_getFieldEntriesLength(JNIEnv* env, jobject wb, jclass klass))
1993 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1994 ConstantPool* cp = ik->constants();
1995 if (cp->cache() == nullptr) {
1996 return -1;
1997 }
1998 return cp->resolved_field_entries_length();
1999 WB_END
2000
2001 WB_ENTRY(jint, WB_getFieldCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2002 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2003 ConstantPool* cp = ik->constants();
2004 if (cp->cache() == nullptr) {
2005 return -1;
2006 }
2007 return cp->resolved_field_entry_at(index)->constant_pool_index();
2008 WB_END
2009
2010 WB_ENTRY(jint, WB_getMethodEntriesLength(JNIEnv* env, jobject wb, jclass klass))
2011 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2012 ConstantPool* cp = ik->constants();
2013 if (cp->cache() == nullptr) {
2014 return -1;
2015 }
2016 return cp->resolved_method_entries_length();
2017 WB_END
2018
2019 WB_ENTRY(jint, WB_getMethodCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2020 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2021 ConstantPool* cp = ik->constants();
2022 if (cp->cache() == nullptr) {
2023 return -1;
2024 }
2025 return cp->resolved_method_entry_at(index)->constant_pool_index();
2026 WB_END
2027
2028 WB_ENTRY(jint, WB_getIndyInfoLength(JNIEnv* env, jobject wb, jclass klass))
2029 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2030 ConstantPool* cp = ik->constants();
2031 if (cp->cache() == nullptr) {
2032 return -1;
2033 }
2034 return cp->resolved_indy_entries_length();
2035 WB_END
2036
2037 WB_ENTRY(jint, WB_getIndyCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2038 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2039 ConstantPool* cp = ik->constants();
2040 if (cp->cache() == nullptr) {
2041 return -1;
2042 }
2043 return cp->resolved_indy_entry_at(index)->constant_pool_index();
2044 WB_END
2045
2046 WB_ENTRY(jobject, WB_printClasses(JNIEnv* env, jobject wb, jstring class_name_pattern, jint flags))
2047 ThreadToNativeFromVM ttnfv(thread);
2048 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2049 ResourceMark rm;
2050 stringStream st;
2051 {
2052 ThreadInVMfromNative ttvfn(thread); // back to VM
2053 ClassPrinter::print_classes(c, flags, &st);
2054 }
2055 jstring result = env->NewStringUTF(st.freeze());
2056 CHECK_JNI_EXCEPTION_(env, nullptr);
2057 return result;
2058 WB_END
2059
2060 WB_ENTRY(jobject, WB_printMethods(JNIEnv* env, jobject wb, jstring class_name_pattern, jstring method_pattern, jint flags))
2061 ThreadToNativeFromVM ttnfv(thread);
2062 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2063 const char* m = env->GetStringUTFChars(method_pattern, nullptr);
2064 ResourceMark rm;
2065 stringStream st;
2066 {
2067 ThreadInVMfromNative ttvfn(thread); // back to VM
2068 ClassPrinter::print_methods(c, m, flags, &st);
2069 }
2070 jstring result = env->NewStringUTF(st.freeze());
2071 CHECK_JNI_EXCEPTION_(env, nullptr);
2072 return result;
2073 WB_END
2074
2075 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
2076 VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
2077 VMThread::execute(&clear_ics);
2078 WB_END
2079
2080 template <typename T>
2081 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
2082 assert(value != nullptr, "sanity");
2083 if (method == nullptr || name == nullptr) {
2084 return false;
2085 }
2086 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
2087 CHECK_JNI_EXCEPTION_(env, false);
2088 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
2089 // can't be in VM when we call JNI
2090 ThreadToNativeFromVM ttnfv(thread);
2091 const char* flag_name = env->GetStringUTFChars(name, nullptr);
2092 CHECK_JNI_EXCEPTION_(env, false);
2093 CompileCommandEnum option = CompilerOracle::string_to_option(flag_name);
2094 env->ReleaseStringUTFChars(name, flag_name);
2095 if (option == CompileCommandEnum::Unknown) {
2096 return false;
2097 }
2098 if (!CompilerOracle::option_matches_type(option, *value)) {
2099 return false;
2100 }
2101 return CompilerOracle::has_option_value(mh, option, *value);
2102 }
2103
2104 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2105 bool result;
2106 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
2107 // can't be in VM when we call JNI
2108 ThreadToNativeFromVM ttnfv(thread);
2109 return booleanBox(thread, env, result);
2110 }
2111 return nullptr;
2112 WB_END
2113
2114 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2115 intx result;
2116 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
2117 // can't be in VM when we call JNI
2118 ThreadToNativeFromVM ttnfv(thread);
2119 return longBox(thread, env, result);
2120 }
2121 return nullptr;
2122 WB_END
2123
2124 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2125 uintx result;
2126 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
2127 // can't be in VM when we call JNI
2128 ThreadToNativeFromVM ttnfv(thread);
2129 return longBox(thread, env, result);
2130 }
2131 return nullptr;
2132 WB_END
2133
2134 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2135 double result;
2136 if (GetMethodOption <double> (thread, env, method, name, &result)) {
2137 // can't be in VM when we call JNI
2138 ThreadToNativeFromVM ttnfv(thread);
2139 return doubleBox(thread, env, result);
2140 }
2141 return nullptr;
2142 WB_END
2143
2144 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2145 ccstr ccstrResult;
2146 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
2147 // can't be in VM when we call JNI
2148 ThreadToNativeFromVM ttnfv(thread);
2149 jstring result = env->NewStringUTF(ccstrResult);
2150 CHECK_JNI_EXCEPTION_(env, nullptr);
2151 return result;
2152 }
2153 return nullptr;
2154 WB_END
2155
2156 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
2157 const char* p = CDSConfig::default_archive_path();
2158 ThreadToNativeFromVM ttn(thread);
2159 jstring path_string = env->NewStringUTF(p);
2160
2161 CHECK_JNI_EXCEPTION_(env, nullptr);
2162
2163 return path_string;
2164 WB_END
2165
2166 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
2167 return CDSConfig::is_using_archive();
2168 WB_END
2169
2170 WB_ENTRY(jint, WB_GetCDSGenericHeaderMinVersion(JNIEnv* env, jobject wb))
2171 #if INCLUDE_CDS
2172 return (jint)CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION;
2173 #else
2174 ShouldNotReachHere();
2175 return (jint)-1;
2176 #endif
2177 WB_END
2178
2179 WB_ENTRY(jint, WB_GetCDSCurrentVersion(JNIEnv* env, jobject wb))
2180 #if INCLUDE_CDS
2181 return (jint)CURRENT_CDS_ARCHIVE_VERSION;
2182 #else
2183 ShouldNotReachHere();
2184 return (jint)-1;
2185 #endif
2186 WB_END
2187
2188 WB_ENTRY(jboolean, WB_CDSMemoryMappingFailed(JNIEnv* env, jobject wb))
2189 return FileMapInfo::memory_mapping_failed();
2190 WB_END
2191
2192 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
2193 return (jboolean)AOTMetaspace::in_aot_cache(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2194 WB_END
2195
2196 WB_ENTRY(void, WB_LinkClass(JNIEnv* env, jobject wb, jclass clazz))
2197 Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2198 if (!k->is_instance_klass()) {
2199 return;
2200 }
2201 InstanceKlass *ik = InstanceKlass::cast(k);
2202 ik->link_class(THREAD); // may throw verification error
2203 WB_END
2204
2205 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
2206 return AOTMappedHeapLoader::is_mapped();
2207 WB_END
2208
2209 WB_ENTRY(jboolean, WB_IsCDSIncluded(JNIEnv* env))
2210 #if INCLUDE_CDS
2211 // An exploded build inhibits use of CDS. Therefore, for the
2212 // purpose of testing, the JVM can be treated as not having CDS
2213 // built in at all.
2214 return ClassLoader::has_jrt_entry();
2215 #else
2216 return false;
2217 #endif // INCLUDE_CDS
2218 WB_END
2219
2220 static bool canWriteJavaHeapArchive() {
2221 return !CDSConfig::are_vm_options_incompatible_with_dumping_heap();
2222 }
2223
2224 WB_ENTRY(jboolean, WB_CanWriteJavaHeapArchive(JNIEnv* env))
2225 return canWriteJavaHeapArchive();
2226 WB_END
2227
2228 WB_ENTRY(jboolean, WB_CanWriteMappedJavaHeapArchive(JNIEnv* env))
2229 return canWriteJavaHeapArchive() && !AOTStreamableObjects;
2230 WB_END
2231
2232 WB_ENTRY(jboolean, WB_CanWriteStreamedJavaHeapArchive(JNIEnv* env))
2233 return canWriteJavaHeapArchive() && AOTStreamableObjects;
2234 WB_END
2235
2236 WB_ENTRY(jboolean, WB_IsJFRIncluded(JNIEnv* env))
2237 #if INCLUDE_JFR
2238 return true;
2239 #else
2240 return false;
2241 #endif // INCLUDE_JFR
2242 WB_END
2243
2244 WB_ENTRY(jboolean, WB_IsDTraceIncluded(JNIEnv* env))
2245 #if defined(DTRACE_ENABLED)
2246 return true;
2247 #else
2248 return false;
2249 #endif // DTRACE_ENABLED
2250 WB_END
2251
2252 #if INCLUDE_CDS
2253
2254 WB_ENTRY(jint, WB_GetCDSOffsetForName(JNIEnv* env, jobject o, jstring name))
2255 ResourceMark rm;
2256 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2257 jint result = (jint)CDSConstants::get_cds_offset(c_name);
2258 return result;
2259 WB_END
2260
2261 WB_ENTRY(jint, WB_GetCDSConstantForName(JNIEnv* env, jobject o, jstring name))
2262 ResourceMark rm;
2263 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2264 jint result = (jint)CDSConstants::get_cds_constant(c_name);
2265 return result;
2266 WB_END
2267
2268 #endif // INCLUDE_CDS
2269
2270 WB_ENTRY(jboolean, WB_HandshakeReadMonitors(JNIEnv* env, jobject wb, jobject thread_handle))
2271 class ReadMonitorsHandshakeClosure : public HandshakeClosure {
2272 jboolean _executed;
2273
2274 void do_thread(Thread* th) {
2275 JavaThread* jt = JavaThread::cast(th);
2276 ResourceMark rm;
2277
2278 GrowableArray<MonitorInfo*>* info = new GrowableArray<MonitorInfo*>();
2279
2280 if (!jt->has_last_Java_frame()) {
2281 return;
2282 }
2283 RegisterMap rmap(jt,
2284 RegisterMap::UpdateMap::include,
2285 RegisterMap::ProcessFrames::include,
2286 RegisterMap::WalkContinuation::skip);
2287 for (javaVFrame* vf = jt->last_java_vframe(&rmap); vf != nullptr; vf = vf->java_sender()) {
2288 GrowableArray<MonitorInfo*> *monitors = vf->monitors();
2289 if (monitors != nullptr) {
2290 int len = monitors->length();
2291 // Walk monitors youngest to oldest
2292 for (int i = len - 1; i >= 0; i--) {
2293 MonitorInfo* mon_info = monitors->at(i);
2294 if (mon_info->eliminated()) continue;
2295 oop owner = mon_info->owner();
2296 if (owner != nullptr) {
2297 info->append(mon_info);
2298 }
2299 }
2300 }
2301 }
2302 _executed = true;
2303 }
2304
2305 public:
2306 ReadMonitorsHandshakeClosure() : HandshakeClosure("WB_HandshakeReadMonitors"), _executed(false) {}
2307 jboolean executed() const { return _executed; }
2308 };
2309
2310 ReadMonitorsHandshakeClosure rmhc;
2311 if (thread_handle != nullptr) {
2312 ThreadsListHandle tlh;
2313 JavaThread* target = nullptr;
2314 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2315 if (is_alive) {
2316 Handshake::execute(&rmhc, &tlh, target);
2317 }
2318 }
2319 return rmhc.executed();
2320 WB_END
2321
2322 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
2323 class TraceSelfHandshakeClosure : public HandshakeClosure {
2324 jint _num_threads_completed;
2325
2326 void do_thread(Thread* th) {
2327 JavaThread* jt = JavaThread::cast(th);
2328 ResourceMark rm;
2329
2330 jt->print_on(tty);
2331 jt->print_stack_on(tty);
2332 tty->cr();
2333 AtomicAccess::inc(&_num_threads_completed);
2334 }
2335
2336 public:
2337 TraceSelfHandshakeClosure(Thread* thread) : HandshakeClosure("WB_TraceSelf"), _num_threads_completed(0) {}
2338
2339 jint num_threads_completed() const { return _num_threads_completed; }
2340 };
2341 TraceSelfHandshakeClosure tshc(Thread::current());
2342
2343 if (all_threads) {
2344 Handshake::execute(&tshc);
2345 } else if (thread_handle != nullptr) {
2346 ThreadsListHandle tlh;
2347 JavaThread* target = nullptr;
2348 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2349 if (is_alive) {
2350 Handshake::execute(&tshc, &tlh, target);
2351 }
2352 }
2353 return tshc.num_threads_completed();
2354 WB_END
2355
2356 WB_ENTRY(void, WB_AsyncHandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle))
2357 class TraceSelfHandshakeClosure : public AsyncHandshakeClosure {
2358 JavaThread* _self;
2359 void do_thread(Thread* th) {
2360 assert(th->is_Java_thread(), "sanity");
2361 // AsynchHandshake handshakes are only executed by target.
2362 assert(_self == th, "Must be");
2363 assert(Thread::current() == th, "Must be");
2364 JavaThread* jt = JavaThread::cast(th);
2365 ResourceMark rm;
2366 jt->print_on(tty);
2367 jt->print_stack_on(tty);
2368 tty->cr();
2369 }
2370
2371 public:
2372 TraceSelfHandshakeClosure(JavaThread* self_target) : AsyncHandshakeClosure("WB_TraceSelf"), _self(self_target) {}
2373 };
2374 if (thread_handle != nullptr) {
2375 ThreadsListHandle tlh;
2376 JavaThread* target = nullptr;
2377 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2378 if (is_alive) {
2379 TraceSelfHandshakeClosure* tshc = new TraceSelfHandshakeClosure(target);
2380 Handshake::execute(tshc, target);
2381 }
2382 }
2383 WB_END
2384
2385 static volatile int _emulated_lock = 0;
2386
2387 WB_ENTRY(void, WB_LockAndBlock(JNIEnv* env, jobject wb, jboolean suspender))
2388 JavaThread* self = JavaThread::current();
2389
2390 {
2391 // Before trying to acquire the lock transition into a safepoint safe state.
2392 // Otherwise if either suspender or suspendee blocks for a safepoint
2393 // in ~ThreadBlockInVM the other one could loop forever trying to acquire
2394 // the lock without allowing the safepoint to progress.
2395 ThreadBlockInVM tbivm(self);
2396
2397 // We will deadlock here if we are 'suspender' and 'suspendee'
2398 // suspended in ~ThreadBlockInVM. This verifies we only suspend
2399 // at the right place.
2400 while (AtomicAccess::cmpxchg(&_emulated_lock, 0, 1) != 0) {}
2401 assert(_emulated_lock == 1, "Must be locked");
2402
2403 // Sleep much longer in suspendee to force situation where
2404 // 'suspender' is waiting above to acquire lock.
2405 os::naked_short_sleep(suspender ? 1 : 10);
2406 }
2407 AtomicAccess::store(&_emulated_lock, 0);
2408 WB_END
2409
2410 // Some convenience methods to deal with objects from java
2411 int WhiteBox::offset_for_field(const char* field_name, oop object,
2412 Symbol* signature_symbol) {
2413 assert(field_name != nullptr && strlen(field_name) > 0, "Field name not valid");
2414
2415 //Only non-array oops have fields. Don't call this function on arrays!
2416 InstanceKlass* ik = InstanceKlass::cast(object->klass());
2417
2418 //Create symbols to look for in the class
2419 TempNewSymbol name_symbol = SymbolTable::new_symbol(field_name);
2420
2421 //To be filled in with an offset of the field we're looking for
2422 fieldDescriptor fd;
2423
2424 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2425 if (res == nullptr) {
2426 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2427 name_symbol->as_C_string());
2428 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2429 }
2430
2431 //fetch the field at the offset we've found
2432 int dest_offset = fd.offset();
2433
2434 return dest_offset;
2435 }
2436
2437
2438 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2439 int offset = offset_for_field(field_name, object,
2440 vmSymbols::string_signature());
2441 oop string = object->obj_field(offset);
2442 if (string == nullptr) {
2443 return nullptr;
2444 }
2445 const char* ret = java_lang_String::as_utf8_string(string);
2446 return ret;
2447 }
2448
2449 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2450 int offset =
2451 offset_for_field(field_name, object, vmSymbols::bool_signature());
2452 bool ret = (object->bool_field(offset) == JNI_TRUE);
2453 return ret;
2454 }
2455
2456 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2457 ResourceMark rm;
2458 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(wbclass));
2459 const char* klass_name = klass->external_name();
2460
2461 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2462
2463 // one by one registration natives for exception catching
2464 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2465 CHECK_JNI_EXCEPTION(env);
2466 for (int i = 0, n = method_count; i < n; ++i) {
2467 // Skip dummy entries
2468 if (method_array[i].fnPtr == nullptr) continue;
2469 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2470 jthrowable throwable_obj = env->ExceptionOccurred();
2471 if (throwable_obj != nullptr) {
2472 env->ExceptionClear();
2473 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2474 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2475 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2476 tty->print_cr("Warning: 'NoSuchMethodError' on register of %s::%s%s",
2477 klass_name, method_array[i].name, method_array[i].signature);
2478 }
2479 } else {
2480 // Registration failed unexpectedly.
2481 tty->print_cr("Warning: unexpected error on register of %s::%s%s. All methods will be unregistered",
2482 klass_name, method_array[i].name, method_array[i].signature);
2483 env->UnregisterNatives(wbclass);
2484 break;
2485 }
2486 }
2487 }
2488 }
2489
2490 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2491 // can't be in VM when we call JNI
2492 ThreadToNativeFromVM ttnfv(thread);
2493 const char* dir = env->GetStringUTFChars(compDirect, nullptr);
2494 CHECK_JNI_EXCEPTION_(env, 0);
2495 int ret;
2496 {
2497 ThreadInVMfromNative ttvfn(thread); // back to VM
2498 ret = DirectivesParser::parse_string(dir, tty);
2499 }
2500 env->ReleaseStringUTFChars(compDirect, dir);
2501 // -1 for error parsing directive. Return 0 as number of directives added.
2502 if (ret == -1) {
2503 ret = 0;
2504 }
2505 return (jint) ret;
2506 WB_END
2507
2508 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2509 DirectivesStack::pop(count);
2510 WB_END
2511
2512 // Checks that the library libfile has the noexecstack bit set.
2513 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2514 jboolean ret = false;
2515 #ifdef LINUX
2516 // Can't be in VM when we call JNI.
2517 ThreadToNativeFromVM ttnfv(thread);
2518 const char* lf = env->GetStringUTFChars(libfile, nullptr);
2519 CHECK_JNI_EXCEPTION_(env, 0);
2520 ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2521 env->ReleaseStringUTFChars(libfile, lf);
2522 #endif
2523 return ret;
2524 WB_END
2525
2526 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2527 return os::is_containerized();
2528 WB_END
2529
2530 // Physical memory of the host machine (including containers)
2531 WB_ENTRY(jlong, WB_HostPhysicalMemory(JNIEnv* env, jobject o))
2532 return static_cast<jlong>(os::Machine::physical_memory());
2533 WB_END
2534
2535 // Available memory of the host machine (container-aware)
2536 WB_ENTRY(jlong, WB_HostAvailableMemory(JNIEnv* env, jobject o))
2537 physical_memory_size_type avail_mem = 0;
2538 // Return value ignored - defaulting to 0 on failure.
2539 (void)os::available_memory(avail_mem);
2540 return static_cast<jlong>(avail_mem);
2541 WB_END
2542
2543 // Physical swap of the host machine (including containers), Linux only.
2544 WB_ENTRY(jlong, WB_HostPhysicalSwap(JNIEnv* env, jobject o))
2545 #ifdef LINUX
2546 physical_memory_size_type swap_val = 0;
2547 if (!os::Linux::host_swap(swap_val)) {
2548 return -1; // treat as unlimited
2549 }
2550 return static_cast<jlong>(swap_val);
2551 #endif
2552 return -1; // Not used/implemented on other platforms
2553 WB_END
2554
2555 WB_ENTRY(jint, WB_ValidateCgroup(JNIEnv* env,
2556 jobject o,
2557 jboolean cgroups_v2_enabled,
2558 jstring controllers_file,
2559 jstring proc_self_cgroup,
2560 jstring proc_self_mountinfo))
2561 jint ret = 0;
2562 #ifdef LINUX
2563 ThreadToNativeFromVM ttnfv(thread);
2564 const char* c_file = env->GetStringUTFChars(controllers_file, nullptr);
2565 CHECK_JNI_EXCEPTION_(env, 0);
2566 const char* p_s_cgroup = env->GetStringUTFChars(proc_self_cgroup, nullptr);
2567 CHECK_JNI_EXCEPTION_(env, 0);
2568 const char* p_s_mountinfo = env->GetStringUTFChars(proc_self_mountinfo, nullptr);
2569 CHECK_JNI_EXCEPTION_(env, 0);
2570 u1 cg_type_flags = 0;
2571 // This sets cg_type_flags
2572 WhiteBox::validate_cgroup(cgroups_v2_enabled, c_file, p_s_cgroup, p_s_mountinfo, &cg_type_flags);
2573 ret = (jint)cg_type_flags;
2574 env->ReleaseStringUTFChars(controllers_file, c_file);
2575 env->ReleaseStringUTFChars(proc_self_cgroup, p_s_cgroup);
2576 env->ReleaseStringUTFChars(proc_self_mountinfo, p_s_mountinfo);
2577 #endif
2578 return ret;
2579 WB_END
2580
2581 // Available cpus of the host machine, Linux only.
2582 // Used in container testing.
2583 WB_ENTRY(jint, WB_HostCPUs(JNIEnv* env, jobject o))
2584 LINUX_ONLY(return os::Linux::active_processor_count();)
2585 return -1; // Not used/implemented on other platforms
2586 WB_END
2587
2588 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2589 os::print_os_info(tty);
2590 WB_END
2591
2592 // Elf decoder
2593 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2594 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2595 ElfFile::_do_not_cache_elf_section = true;
2596 #endif
2597 WB_END
2598
2599 WB_ENTRY(jlong, WB_ResolvedMethodItemsCount(JNIEnv* env, jobject o))
2600 return (jlong) ResolvedMethodTable::items_count();
2601 WB_END
2602
2603 WB_ENTRY(jint, WB_GetKlassMetadataSize(JNIEnv* env, jobject wb, jclass mirror))
2604 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(mirror));
2605 // Return size in bytes.
2606 return k->size() * wordSize;
2607 WB_END
2608
2609 // See test/hotspot/jtreg/runtime/Thread/ThreadObjAccessAtExit.java.
2610 // It explains how the thread's priority field is used for test state coordination.
2611 //
2612 WB_ENTRY(void, WB_CheckThreadObjOfTerminatingThread(JNIEnv* env, jobject wb, jobject target_handle))
2613 oop target_oop = JNIHandles::resolve_non_null(target_handle);
2614 jlong tid = java_lang_Thread::thread_id(target_oop);
2615 JavaThread* target = java_lang_Thread::thread(target_oop);
2616
2617 // Grab a ThreadsListHandle to protect the target thread whilst terminating
2618 ThreadsListHandle tlh;
2619
2620 // Look up the target thread by tid to ensure it is present
2621 JavaThread* t = tlh.list()->find_JavaThread_from_java_tid(tid);
2622 if (t == nullptr) {
2623 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread not found in ThreadsList!");
2624 }
2625
2626 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is protected");
2627 // Allow target to terminate by boosting priority
2628 java_lang_Thread::set_priority(t->threadObj(), ThreadPriority(NormPriority + 1));
2629
2630 // Now wait for the target to terminate
2631 while (!target->is_terminated()) {
2632 ThreadBlockInVM tbivm(thread); // just in case target is involved in a safepoint
2633 os::naked_short_sleep(0);
2634 }
2635
2636 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is terminated");
2637
2638 // Now release the GC inducing thread - we have to re-resolve the external oop that
2639 // was passed in as GC may have occurred and we don't know if we can trust t->threadObj() now.
2640 oop original = JNIHandles::resolve_non_null(target_handle);
2641 java_lang_Thread::set_priority(original, ThreadPriority(NormPriority + 2));
2642
2643 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: GC has been initiated - checking threadObj:");
2644
2645 // The Java code should be creating garbage and triggering GC, which would potentially move
2646 // the threadObj oop. If the exiting thread is properly protected then its threadObj should
2647 // remain valid and equal to our initial target_handle. Loop a few times to give GC a chance to
2648 // kick in.
2649 for (int i = 0; i < 5; i++) {
2650 oop original = JNIHandles::resolve_non_null(target_handle);
2651 oop current = t->threadObj();
2652 if (original != current) {
2653 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: failed comparison on iteration %d", i);
2654 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread oop has changed!");
2655 } else {
2656 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: successful comparison on iteration %d", i);
2657 ThreadBlockInVM tbivm(thread);
2658 os::naked_short_sleep(50);
2659 }
2660 }
2661 WB_END
2662
2663 WB_ENTRY(void, WB_VerifyFrames(JNIEnv* env, jobject wb, jboolean log, jboolean update_map))
2664 ResourceMark rm; // for verify
2665 stringStream st;
2666 for (StackFrameStream fst(JavaThread::current(), update_map, true); !fst.is_done(); fst.next()) {
2667 frame* current_frame = fst.current();
2668 if (log) {
2669 current_frame->print_value_on(&st);
2670 }
2671 current_frame->verify(fst.register_map());
2672 }
2673 if (log) {
2674 tty->print_cr("[WhiteBox::VerifyFrames] Walking Frames");
2675 tty->print_raw(st.freeze());
2676 tty->print_cr("[WhiteBox::VerifyFrames] Done");
2677 }
2678 WB_END
2679
2680 WB_ENTRY(jboolean, WB_IsJVMTIIncluded(JNIEnv* env, jobject wb))
2681 #if INCLUDE_JVMTI
2682 return JNI_TRUE;
2683 #else
2684 return JNI_FALSE;
2685 #endif
2686 WB_END
2687
2688 WB_ENTRY(void, WB_WaitUnsafe(JNIEnv* env, jobject wb, jint time))
2689 os::naked_short_sleep(time);
2690 WB_END
2691
2692 WB_ENTRY(void, WB_BusyWaitCPUTime(JNIEnv* env, jobject wb, jint time))
2693 ThreadToNativeFromVM ttn(thread);
2694 u8 start = os::current_thread_cpu_time();
2695 u8 target_duration = time * (u8)1000000;
2696 while (os::current_thread_cpu_time() - start < target_duration) {
2697 for (volatile int i = 0; i < 1000000; i++);
2698 }
2699 WB_END
2700
2701 WB_ENTRY(jboolean, WB_CPUSamplerSetOutOfStackWalking(JNIEnv* env, jobject wb, jboolean enable))
2702 #if defined(ASSERT) && INCLUDE_JFR && defined(LINUX)
2703 return JfrCPUTimeThreadSampling::set_out_of_stack_walking_enabled(enable == JNI_TRUE) ? JNI_TRUE : JNI_FALSE;
2704 #else
2705 return JNI_FALSE;
2706 #endif
2707 WB_END
2708
2709 WB_ENTRY(jstring, WB_GetLibcName(JNIEnv* env, jobject o))
2710 ThreadToNativeFromVM ttn(thread);
2711 jstring info_string = env->NewStringUTF(XSTR(LIBC));
2712 CHECK_JNI_EXCEPTION_(env, nullptr);
2713 return info_string;
2714 WB_END
2715
2716 WB_ENTRY(void, WB_PinObject(JNIEnv* env, jobject wb, jobject o))
2717 #if INCLUDE_G1GC
2718 if (!UseG1GC) {
2719 ShouldNotReachHere();
2720 return;
2721 }
2722 oop obj = JNIHandles::resolve(o);
2723 G1CollectedHeap::heap()->pin_object(thread, obj);
2724 #else
2725 ShouldNotReachHere();
2726 #endif // INCLUDE_G1GC
2727 WB_END
2728
2729 WB_ENTRY(void, WB_UnpinObject(JNIEnv* env, jobject wb, jobject o))
2730 #if INCLUDE_G1GC
2731 if (!UseG1GC) {
2732 ShouldNotReachHere();
2733 return;
2734 }
2735 oop obj = JNIHandles::resolve(o);
2736 G1CollectedHeap::heap()->unpin_object(thread, obj);
2737 #else
2738 ShouldNotReachHere();
2739 #endif // INCLUDE_G1GC
2740 WB_END
2741
2742 WB_ENTRY(jboolean, WB_SetVirtualThreadsNotifyJvmtiMode(JNIEnv* env, jobject wb, jboolean enable))
2743 if (!Continuations::enabled()) {
2744 tty->print_cr("WB error: must be Continuations::enabled()!");
2745 return JNI_FALSE;
2746 }
2747 jboolean result = false;
2748 #if INCLUDE_JVMTI
2749 if (enable) {
2750 result = JvmtiEnvBase::enable_virtual_threads_notify_jvmti();
2751 } else {
2752 result = JvmtiEnvBase::disable_virtual_threads_notify_jvmti();
2753 }
2754 #endif
2755 return result;
2756 WB_END
2757
2758 WB_ENTRY(void, WB_PreTouchMemory(JNIEnv* env, jobject wb, jlong addr, jlong size))
2759 void* const from = (void*)addr;
2760 void* const to = (void*)(addr + size);
2761 if (from > to) {
2762 os::pretouch_memory(from, to, os::vm_page_size());
2763 }
2764 WB_END
2765
2766 WB_ENTRY(void, WB_CleanMetaspaces(JNIEnv* env, jobject target))
2767 ClassLoaderDataGraph::safepoint_and_clean_metaspaces();
2768 WB_END
2769
2770 // Reports resident set size (RSS) in bytes
2771 WB_ENTRY(jlong, WB_Rss(JNIEnv* env, jobject o))
2772 return os::rss();
2773 WB_END
2774
2775 WB_ENTRY(void, WB_ControlledCrash(JNIEnv* env, jobject o, jint how))
2776 #ifdef ASSERT
2777 VMError::controlled_crash(how);
2778 #else
2779 THROW_MSG(vmSymbols::java_lang_UnsupportedOperationException(), "Only available in debug builds");
2780 #endif
2781 WB_END
2782
2783 #define CC (char*)
2784
2785 static JNINativeMethod methods[] = {
2786 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
2787 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
2788 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
2789 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
2790 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
2791 {CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
2792 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
2793 {CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
2794 {CC"getHeapAlignment", CC"()J", (void*)&WB_GetHeapAlignment},
2795 {CC"shipsFullDebugInfo", CC"()Z", (void*)&WB_ShipDebugInfoFull},
2796 {CC"shipsPublicDebugInfo", CC"()Z", (void*)&WB_ShipDebugInfoPublic},
2797 {CC"countAliveClasses0", CC"(Ljava/lang/String;)I", (void*)&WB_CountAliveClasses },
2798 {CC"getSymbolRefcount", CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2799 {CC"parseCommandLine0",
2800 CC"(Ljava/lang/String;C[Ljdk/test/whitebox/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2801 (void*) &WB_ParseCommandLine
2802 },
2803 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2804 (void*)&WB_AddToBootstrapClassLoaderSearch},
2805 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2806 (void*)&WB_AddToSystemClassLoaderSearch},
2807 {CC"getCompressedOopsMaxHeapSize", CC"()J",
2808 (void*)&WB_GetCompressedOopsMaxHeapSize},
2809 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
2810 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
2811 {CC"decodeNKlassAndAccessKlass",CC"(I)V", (void*)&WB_DecodeNKlassAndAccessKlass},
2812 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
2813 #if INCLUDE_CDS
2814 {CC"getCDSOffsetForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSOffsetForName},
2815 {CC"getCDSConstantForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSConstantForName},
2816 #endif
2817 #if INCLUDE_G1GC
2818 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
2819 {CC"g1CompletedConcurrentMarkCycles", CC"()I", (void*)&WB_G1CompletedConcurrentMarkCycles},
2820 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
2821 {CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
2822 {CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
2823 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
2824 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
2825 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
2826 {CC"g1HasRegionsToUncommit", CC"()Z", (void*)&WB_G1HasRegionsToUncommit},
2827 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2828 (void*)&WB_G1AuxiliaryMemoryUsage },
2829 {CC"g1ActiveMemoryNodeCount", CC"()I", (void*)&WB_G1ActiveMemoryNodeCount },
2830 {CC"g1MemoryNodeIds", CC"()[I", (void*)&WB_G1MemoryNodeIds },
2831 {CC"g1GetMixedGCInfo", CC"(I)[J", (void*)&WB_G1GetMixedGCInfo },
2832 #endif // INCLUDE_G1GC
2833 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
2834 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
2835 {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J", (void*)&WB_NMTMallocWithPseudoStackAndType},
2836 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
2837 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
2838 {CC"NMTAttemptReserveMemoryAt", CC"(JJ)J", (void*)&WB_NMTAttemptReserveMemoryAt },
2839 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
2840 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
2841 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
2842 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
2843 {CC"NMTNewArena", CC"(J)J", (void*)&WB_NMTNewArena },
2844 {CC"NMTFreeArena", CC"(J)V", (void*)&WB_NMTFreeArena },
2845 {CC"NMTArenaMalloc", CC"(JJ)V", (void*)&WB_NMTArenaMalloc },
2846 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
2847 {CC"isFrameDeoptimized", CC"(I)Z", (void*)&WB_IsFrameDeoptimized},
2848 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
2849 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
2850 (void*)&WB_DeoptimizeMethod },
2851 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
2852 (void*)&WB_IsMethodCompiled },
2853 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
2854 (void*)&WB_IsMethodCompilable},
2855 {CC"isMethodQueuedForCompilation0",
2856 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
2857 {CC"isIntrinsicAvailable0",
2858 CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
2859 (void*)&WB_IsIntrinsicAvailable},
2860 {CC"makeMethodNotCompilable0",
2861 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
2862 {CC"testSetDontInlineMethod0",
2863 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
2864 {CC"getMethodCompilationLevel0",
2865 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
2866 {CC"getMethodDecompileCount0",
2867 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodDecompileCount},
2868 {CC"getMethodTrapCount0",
2869 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2870 (void*)&WB_GetMethodTrapCount},
2871 {CC"getDeoptCount0",
2872 CC"(Ljava/lang/String;Ljava/lang/String;)I", (void*)&WB_GetDeoptCount},
2873 {CC"getMethodEntryBci0",
2874 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
2875 {CC"getCompileQueueSize",
2876 CC"(I)I", (void*)&WB_GetCompileQueueSize},
2877 {CC"testSetForceInlineMethod0",
2878 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
2879 {CC"enqueueMethodForCompilation0",
2880 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
2881 {CC"enqueueInitializerForCompilation0",
2882 CC"(Ljava/lang/Class;I)Z", (void*)&WB_EnqueueInitializerForCompilation},
2883 {CC"markMethodProfiled",
2884 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_MarkMethodProfiled},
2885 {CC"clearMethodState0",
2886 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
2887 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
2888 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
2889 {CC"matchesMethod",
2890 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2891 (void*)&WB_MatchesMethod},
2892 {CC"matchesInline",
2893 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2894 (void*)&WB_MatchesInline},
2895 {CC"shouldPrintAssembly",
2896 CC"(Ljava/lang/reflect/Executable;I)Z",
2897 (void*)&WB_ShouldPrintAssembly},
2898
2899 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
2900 {CC"isDefaultVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsDefaultVMFlag},
2901 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
2902 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
2903 {CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
2904 {CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
2905 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
2906 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
2907 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
2908 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
2909 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
2910 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
2911 (void*)&WB_SetStringVMFlag},
2912 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
2913 (void*)&WB_GetBooleanVMFlag},
2914 {CC"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2915 (void*)&WB_GetIntVMFlag},
2916 {CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2917 (void*)&WB_GetUintVMFlag},
2918 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2919 (void*)&WB_GetIntxVMFlag},
2920 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2921 (void*)&WB_GetUintxVMFlag},
2922 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2923 (void*)&WB_GetUint64VMFlag},
2924 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2925 (void*)&WB_GetSizeTVMFlag},
2926 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
2927 (void*)&WB_GetDoubleVMFlag},
2928 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
2929 (void*)&WB_GetStringVMFlag},
2930 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
2931 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
2932 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
2933 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
2934 {CC"allocateMetaspace",
2935 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
2936 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
2937 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
2938 {CC"metaspaceSharedRegionAlignment", CC"()J", (void*)&WB_AOTMetaspaceRegionAlignment },
2939 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
2940 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
2941 (void*)&WB_GetNMethod },
2942 {CC"relocateNMethodFromMethod0", CC"(Ljava/lang/reflect/Executable;I)V",
2943 (void*)&WB_RelocateNMethodFromMethod },
2944 {CC"relocateNMethodFromAddr", CC"(JI)V", (void*)&WB_RelocateNMethodFromAddr },
2945 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
2946 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
2947 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
2948 {CC"getCompilationActivityMode",
2949 CC"()I", (void*)&WB_GetCompilationActivityMode},
2950 {CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
2951 (void*)&WB_GetMethodData },
2952 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
2953 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
2954 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
2955 {CC"DefineModule", CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
2956 (void*)&WB_DefineModule },
2957 {CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
2958 (void*)&WB_AddModuleExports },
2959 {CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
2960 (void*)&WB_AddReadsModule },
2961 {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2962 (void*)&WB_AddModuleExportsToAllUnnamed },
2963 {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
2964 (void*)&WB_AddModuleExportsToAll },
2965 {CC"deflateIdleMonitors", CC"()Z", (void*)&WB_DeflateIdleMonitors },
2966 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
2967 {CC"isAsanEnabled", CC"()Z", (void*)&WB_IsAsanEnabled },
2968 {CC"isUbsanEnabled", CC"()Z", (void*)&WB_IsUbsanEnabled },
2969 {CC"getInUseMonitorCount", CC"()J", (void*)&WB_getInUseMonitorCount },
2970 {CC"getLockStackCapacity", CC"()I", (void*)&WB_getLockStackCapacity },
2971 {CC"supportsRecursiveFastLocking", CC"()Z", (void*)&WB_supportsRecursiveFastLocking },
2972 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
2973 {CC"forceClassLoaderStatsSafepoint", CC"()V", (void*)&WB_ForceClassLoaderStatsSafepoint },
2974 {CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
2975 {CC"getResolvedReferences0", CC"(Ljava/lang/Class;)[Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
2976 {CC"getFieldEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getFieldEntriesLength},
2977 {CC"getFieldCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getFieldCPIndex},
2978 {CC"getMethodEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getMethodEntriesLength},
2979 {CC"getMethodCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getMethodCPIndex},
2980 {CC"getIndyInfoLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getIndyInfoLength},
2981 {CC"getIndyCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getIndyCPIndex},
2982 {CC"printClasses0", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printClasses},
2983 {CC"printMethods0", CC"(Ljava/lang/String;Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printMethods},
2984 {CC"getMethodBooleanOption",
2985 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
2986 (void*)&WB_GetMethodBooleaneOption},
2987 {CC"getMethodIntxOption",
2988 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2989 (void*)&WB_GetMethodIntxOption},
2990 {CC"getMethodUintxOption",
2991 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
2992 (void*)&WB_GetMethodUintxOption},
2993 {CC"getMethodDoubleOption",
2994 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
2995 (void*)&WB_GetMethodDoubleOption},
2996 {CC"getMethodStringOption",
2997 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
2998 (void*)&WB_GetMethodStringOption},
2999 {CC"getDefaultArchivePath", CC"()Ljava/lang/String;",
3000 (void*)&WB_GetDefaultArchivePath},
3001 {CC"getCDSGenericHeaderMinVersion", CC"()I", (void*)&WB_GetCDSGenericHeaderMinVersion},
3002 {CC"getCurrentCDSVersion", CC"()I", (void*)&WB_GetCDSCurrentVersion},
3003 {CC"isSharingEnabled", CC"()Z", (void*)&WB_IsSharingEnabled},
3004 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
3005 {CC"linkClass", CC"(Ljava/lang/Class;)V", (void*)&WB_LinkClass},
3006 {CC"areOpenArchiveHeapObjectsMapped", CC"()Z", (void*)&WB_AreOpenArchiveHeapObjectsMapped},
3007 {CC"isCDSIncluded", CC"()Z", (void*)&WB_IsCDSIncluded },
3008 {CC"isJFRIncluded", CC"()Z", (void*)&WB_IsJFRIncluded },
3009 {CC"isDTraceIncluded", CC"()Z", (void*)&WB_IsDTraceIncluded },
3010 {CC"canWriteJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteJavaHeapArchive },
3011 {CC"canWriteMappedJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteMappedJavaHeapArchive },
3012 {CC"canWriteStreamedJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteStreamedJavaHeapArchive },
3013 {CC"cdsMemoryMappingFailed", CC"()Z", (void*)&WB_CDSMemoryMappingFailed },
3014
3015 {CC"clearInlineCaches0", CC"(Z)V", (void*)&WB_ClearInlineCaches },
3016 {CC"handshakeReadMonitors", CC"(Ljava/lang/Thread;)Z", (void*)&WB_HandshakeReadMonitors },
3017 {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
3018 {CC"asyncHandshakeWalkStack", CC"(Ljava/lang/Thread;)V", (void*)&WB_AsyncHandshakeWalkStack },
3019 {CC"lockAndBlock", CC"(Z)V", (void*)&WB_LockAndBlock},
3020 {CC"checkThreadObjOfTerminatingThread", CC"(Ljava/lang/Thread;)V", (void*)&WB_CheckThreadObjOfTerminatingThread },
3021 {CC"verifyFrames", CC"(ZZ)V", (void*)&WB_VerifyFrames },
3022 {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
3023 (void*)&WB_AddCompilerDirective },
3024 {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
3025 {CC"isGCSupported", CC"(I)Z", (void*)&WB_IsGCSupported},
3026 {CC"isGCSelected", CC"(I)Z", (void*)&WB_IsGCSelected},
3027 {CC"isGCSelectedErgonomically", CC"()Z", (void*)&WB_IsGCSelectedErgonomically},
3028 {CC"supportsConcurrentGCBreakpoints", CC"()Z", (void*)&WB_SupportsConcurrentGCBreakpoints},
3029 {CC"concurrentGCAcquireControl0", CC"()V", (void*)&WB_ConcurrentGCAcquireControl},
3030 {CC"concurrentGCReleaseControl0", CC"()V", (void*)&WB_ConcurrentGCReleaseControl},
3031 {CC"concurrentGCRunToIdle0", CC"()V", (void*)&WB_ConcurrentGCRunToIdle},
3032 {CC"concurrentGCRunTo0", CC"(Ljava/lang/String;)Z",
3033 (void*)&WB_ConcurrentGCRunTo},
3034 {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
3035 (void*)&WB_CheckLibSpecifiesNoexecstack},
3036 {CC"isContainerized", CC"()Z", (void*)&WB_IsContainerized },
3037 {CC"validateCgroup",
3038 CC"(ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
3039 (void*)&WB_ValidateCgroup },
3040 {CC"hostPhysicalMemory", CC"()J", (void*)&WB_HostPhysicalMemory },
3041 {CC"hostPhysicalSwap", CC"()J", (void*)&WB_HostPhysicalSwap },
3042 {CC"hostAvailableMemory", CC"()J", (void*)&WB_HostAvailableMemory },
3043 {CC"hostCPUs", CC"()I", (void*)&WB_HostCPUs },
3044 {CC"printOsInfo", CC"()V", (void*)&WB_PrintOsInfo },
3045 {CC"disableElfSectionCache", CC"()V", (void*)&WB_DisableElfSectionCache },
3046 {CC"resolvedMethodItemsCount", CC"()J", (void*)&WB_ResolvedMethodItemsCount },
3047 {CC"getKlassMetadataSize", CC"(Ljava/lang/Class;)I",(void*)&WB_GetKlassMetadataSize},
3048
3049 {CC"createMetaspaceTestContext", CC"(JJ)J", (void*)&WB_CreateMetaspaceTestContext},
3050 {CC"destroyMetaspaceTestContext", CC"(J)V", (void*)&WB_DestroyMetaspaceTestContext},
3051 {CC"purgeMetaspaceTestContext", CC"(J)V", (void*)&WB_PurgeMetaspaceTestContext},
3052 {CC"printMetaspaceTestContext", CC"(J)V", (void*)&WB_PrintMetaspaceTestContext},
3053 {CC"getTotalCommittedBytesInMetaspaceTestContext", CC"(J)J",(void*)&WB_GetTotalCommittedBytesInMetaspaceTestContext},
3054 {CC"getTotalUsedBytesInMetaspaceTestContext", CC"(J)J", (void*)&WB_GetTotalUsedBytesInMetaspaceTestContext},
3055 {CC"createArenaInTestContext", CC"(JZ)J", (void*)&WB_CreateArenaInTestContext},
3056 {CC"destroyMetaspaceTestArena", CC"(J)V", (void*)&WB_DestroyMetaspaceTestArena},
3057 {CC"allocateFromMetaspaceTestArena", CC"(JJ)J", (void*)&WB_AllocateFromMetaspaceTestArena},
3058 {CC"deallocateToMetaspaceTestArena", CC"(JJJ)V", (void*)&WB_DeallocateToMetaspaceTestArena},
3059 {CC"maxMetaspaceAllocationSize", CC"()J", (void*)&WB_GetMaxMetaspaceAllocationSize},
3060
3061 {CC"isJVMTIIncluded", CC"()Z", (void*)&WB_IsJVMTIIncluded},
3062 {CC"waitUnsafe", CC"(I)V", (void*)&WB_WaitUnsafe},
3063 {CC"busyWaitCPUTime", CC"(I)V", (void*)&WB_BusyWaitCPUTime},
3064 {CC"cpuSamplerSetOutOfStackWalking", CC"(Z)Z", (void*)&WB_CPUSamplerSetOutOfStackWalking},
3065 {CC"getLibcName", CC"()Ljava/lang/String;", (void*)&WB_GetLibcName},
3066
3067 {CC"pinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_PinObject},
3068 {CC"unpinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_UnpinObject},
3069 {CC"setVirtualThreadsNotifyJvmtiMode", CC"(Z)Z", (void*)&WB_SetVirtualThreadsNotifyJvmtiMode},
3070 {CC"preTouchMemory", CC"(JJ)V", (void*)&WB_PreTouchMemory},
3071 {CC"cleanMetaspaces", CC"()V", (void*)&WB_CleanMetaspaces},
3072 {CC"rss", CC"()J", (void*)&WB_Rss},
3073 {CC"printString", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_PrintString},
3074 {CC"lockAndStuckInSafepoint", CC"()V", (void*)&WB_TakeLockAndHangInSafepoint},
3075 {CC"getMinimumJavaStackSize", CC"()J", (void*)&WB_GetMinimumJavaStackSize},
3076 {CC"wordSize", CC"()J", (void*)&WB_WordSize},
3077 {CC"rootChunkWordSize", CC"()J", (void*)&WB_RootChunkWordSize},
3078 {CC"isStatic", CC"()Z", (void*)&WB_IsStaticallyLinked},
3079 {CC"controlledCrash",CC"(I)V", (void*)&WB_ControlledCrash},
3080 };
3081
3082 #undef CC
3083
3084 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
3085 {
3086 if (WhiteBoxAPI) {
3087 // Make sure that wbclass is loaded by the null classloader
3088 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(wbclass));
3089 Handle loader(THREAD, ik->class_loader());
3090 if (loader.is_null()) {
3091 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
3092 WhiteBox::set_used();
3093 }
3094 }
3095 }
3096 JVM_END