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