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