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