1 /*
2 * Copyright (c) 2012, 2026, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds.h"
26 #include "cds/aotMappedHeapLoader.hpp"
27 #include "cds/aotMetaspace.hpp"
28 #include "cds/cdsConstants.hpp"
29 #include "cds/filemap.hpp"
30 #include "cds/heapShared.inline.hpp"
31 #include "classfile/classLoader.hpp"
32 #include "classfile/classLoaderDataGraph.hpp"
33 #include "classfile/classLoaderStats.hpp"
34 #include "classfile/classPrinter.hpp"
35 #include "classfile/javaClasses.inline.hpp"
36 #include "classfile/modules.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/codeCache.hpp"
42 #include "code/compiledIC.hpp"
43 #include "compiler/compilationPolicy.hpp"
44 #include "compiler/compilerOracle.hpp"
45 #include "compiler/directivesParser.hpp"
46 #include "compiler/methodMatcher.hpp"
47 #include "gc/shared/concurrentGCBreakpoints.hpp"
48 #include "gc/shared/gcConfig.hpp"
49 #include "gc/shared/genArguments.hpp"
50 #include "jfr/periodic/sampling/jfrCPUTimeThreadSampler.hpp"
51 #include "jvm.h"
52 #include "jvmtifiles/jvmtiEnv.hpp"
53 #include "logging/log.hpp"
54 #include "memory/iterator.hpp"
55 #include "memory/memoryReserver.hpp"
56 #include "memory/metadataFactory.hpp"
57 #include "memory/metaspace/testHelpers.hpp"
58 #include "memory/metaspaceUtils.hpp"
59 #include "memory/oopFactory.hpp"
60 #include "memory/resourceArea.hpp"
61 #include "memory/universe.hpp"
62 #include "nmt/mallocSiteTable.hpp"
63 #include "oops/array.hpp"
64 #include "oops/compressedOops.hpp"
65 #include "oops/constantPool.inline.hpp"
66 #include "oops/klass.inline.hpp"
67 #include "oops/method.inline.hpp"
68 #include "oops/methodData.inline.hpp"
69 #include "oops/objArrayKlass.hpp"
70 #include "oops/objArrayOop.inline.hpp"
71 #include "oops/oop.inline.hpp"
72 #include "oops/typeArrayOop.inline.hpp"
73 #include "prims/jvmtiEnvBase.hpp"
74 #include "prims/resolvedMethodTable.hpp"
75 #include "prims/wbtestmethods/parserTests.hpp"
76 #include "prims/whitebox.inline.hpp"
77 #include "runtime/arguments.hpp"
78 #include "runtime/atomicAccess.hpp"
79 #include "runtime/deoptimization.hpp"
80 #include "runtime/fieldDescriptor.inline.hpp"
81 #include "runtime/flags/jvmFlag.hpp"
82 #include "runtime/flags/jvmFlagAccess.hpp"
83 #include "runtime/frame.inline.hpp"
84 #include "runtime/handles.inline.hpp"
85 #include "runtime/handshake.hpp"
86 #include "runtime/interfaceSupport.inline.hpp"
87 #include "runtime/javaCalls.hpp"
88 #include "runtime/javaThread.inline.hpp"
89 #include "runtime/jniHandles.inline.hpp"
90 #include "runtime/lockStack.hpp"
91 #include "runtime/os.hpp"
92 #include "runtime/stackFrameStream.inline.hpp"
93 #include "runtime/synchronizer.hpp"
94 #include "runtime/threadSMR.hpp"
95 #include "runtime/vframe.hpp"
96 #include "runtime/vm_version.hpp"
97 #include "services/memoryService.hpp"
98 #include "utilities/align.hpp"
99 #include "utilities/checkedCast.hpp"
100 #include "utilities/debug.hpp"
101 #include "utilities/elfFile.hpp"
102 #include "utilities/exceptions.hpp"
103 #include "utilities/macros.hpp"
104 #include "utilities/nativeCallStack.hpp"
105 #include "utilities/ostream.hpp"
106 #include "utilities/vmError.hpp"
107 #if INCLUDE_G1GC
108 #include "gc/g1/g1Arguments.hpp"
109 #include "gc/g1/g1CollectedHeap.inline.hpp"
110 #include "gc/g1/g1ConcurrentMark.hpp"
111 #include "gc/g1/g1ConcurrentMarkThread.inline.hpp"
112 #include "gc/g1/g1HeapRegionManager.hpp"
113 #include "gc/g1/g1HeapRegionRemSet.inline.hpp"
114 #endif // INCLUDE_G1GC
115 #if INCLUDE_PARALLELGC
116 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
117 #endif // INCLUDE_PARALLELGC
118 #if INCLUDE_SERIALGC
119 #include "gc/serial/serialHeap.hpp"
120 #endif // INCLUDE_SERIALGC
121 #if INCLUDE_ZGC
122 #include "gc/z/zAddress.inline.hpp"
123 #include "gc/z/zHeap.inline.hpp"
124 #endif // INCLUDE_ZGC
125 #if INCLUDE_JVMCI
126 #include "jvmci/jvmciEnv.hpp"
127 #include "jvmci/jvmciRuntime.hpp"
128 #endif
129 #ifdef LINUX
130 #include "cgroupSubsystem_linux.hpp"
131 #include "os_linux.hpp"
132 #endif
133
134 #define CHECK_JNI_EXCEPTION_(env, value) \
135 do { \
136 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
137 THREAD->clear_pending_jni_exception_check(); \
138 if (HAS_PENDING_EXCEPTION) { \
139 return(value); \
140 } \
141 } while (0)
142
143 #define CHECK_JNI_EXCEPTION(env) \
144 do { \
145 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
146 THREAD->clear_pending_jni_exception_check(); \
147 if (HAS_PENDING_EXCEPTION) { \
148 return; \
149 } \
150 } while (0)
151
152 bool WhiteBox::_used = false;
153 volatile bool WhiteBox::compilation_locked = false;
154
155 class VM_WhiteBoxOperation : public VM_Operation {
156 public:
157 VM_WhiteBoxOperation() { }
158 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
159 bool allow_nested_vm_operations() const { return true; }
160 };
161
162
163 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
164 return (jlong)(void*)JNIHandles::resolve(obj);
165 WB_END
166
167 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
168 return heapOopSize;
169 WB_END
170
171 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
172 return (jint)os::vm_page_size();
173 WB_END
174
175 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
176 return os::vm_allocation_granularity();
177 WB_END
178
179 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
180 return os::large_page_size();
181 WB_END
182
183 WB_ENTRY(jstring, WB_PrintString(JNIEnv* env, jobject wb, jstring str, jint max_length))
184 ResourceMark rm(THREAD);
185 stringStream sb;
186 java_lang_String::print(JNIHandles::resolve(str), &sb, max_length);
187 oop result = java_lang_String::create_oop_from_str(sb.as_string(), THREAD);
188 return (jstring) JNIHandles::make_local(THREAD, result);
189 WB_END
190
191 WB_ENTRY(jint, WB_TakeLockAndHangInSafepoint(JNIEnv* env, jobject wb))
192 JavaThread* self = JavaThread::current();
193 // VMStatistic_lock is used to minimize interference with VM locking
194 MutexLocker mu(VMStatistic_lock);
195 VM_HangInSafepoint force_safepoint_stuck_op;
196 VMThread::execute(&force_safepoint_stuck_op);
197 ShouldNotReachHere();
198 return 0;
199 WB_END
200
201 WB_ENTRY(jlong, WB_GetMinimumJavaStackSize(JNIEnv* env, jobject o))
202 return os::get_minimum_java_stack_size();
203 WB_END
204
205 class WBIsKlassAliveClosure : public LockedClassesDo {
206 Symbol* _name;
207 int _count;
208 public:
209 WBIsKlassAliveClosure(Symbol* name) : _name(name), _count(0) {}
210
211 void do_klass(Klass* k) {
212 Symbol* ksym = k->name();
213 if (ksym->fast_compare(_name) == 0) {
214 _count++;
215 } else if (k->is_instance_klass()) {
216 // Need special handling for hidden classes because the JVM
217 // appends "+<hex-address>" to hidden class names.
218 InstanceKlass *ik = InstanceKlass::cast(k);
219 if (ik->is_hidden()) {
220 ResourceMark rm;
221 char* k_name = ksym->as_C_string();
222 // Find the first '+' char and truncate the string at that point.
223 // NOTE: This will not work correctly if the original hidden class
224 // name contains a '+'.
225 char* plus_char = strchr(k_name, '+');
226 if (plus_char != nullptr) {
227 *plus_char = 0;
228 char* c_name = _name->as_C_string();
229 if (strcmp(c_name, k_name) == 0) {
230 _count++;
231 }
232 }
233 }
234 }
235 }
236
237 int count() const {
238 return _count;
239 }
240 };
241
242 WB_ENTRY(jint, WB_CountAliveClasses(JNIEnv* env, jobject target, jstring name))
243 oop h_name = JNIHandles::resolve(name);
244 if (h_name == nullptr) {
245 return 0;
246 }
247 Symbol* sym = java_lang_String::as_symbol(h_name);
248 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
249
250 WBIsKlassAliveClosure closure(sym);
251 ClassLoaderDataGraph::classes_do(&closure);
252
253 // Return the count of alive classes with this name.
254 return closure.count();
255 WB_END
256
257 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
258 oop h_name = JNIHandles::resolve(name);
259 if (h_name == nullptr) {
260 return 0;
261 }
262 Symbol* sym = java_lang_String::as_symbol(h_name);
263 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
264 return (jint)sym->refcount();
265 WB_END
266
267
268 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
269 #if INCLUDE_JVMTI
270 ResourceMark rm;
271 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
272 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
273 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
274 assert(err == JVMTI_ERROR_NONE, "must not fail");
275 #endif
276 }
277 WB_END
278
279 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
280 #if INCLUDE_JVMTI
281 ResourceMark rm;
282 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
283 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
284 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
285 assert(err == JVMTI_ERROR_NONE, "must not fail");
286 #endif
287 }
288 WB_END
289
290
291 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
292 return (jlong)Arguments::max_heap_for_compressed_oops();
293 }
294 WB_END
295
296 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
297 tty->print_cr("Minimum heap %zu Initial heap %zu "
298 "Maximum heap %zu Space alignment %zu Heap alignment %zu",
299 MinHeapSize,
300 InitialHeapSize,
301 MaxHeapSize,
302 SpaceAlignment,
303 HeapAlignment);
304 }
305 WB_END
306
307 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
308 size_t granularity = os::vm_allocation_granularity();
309 ReservedHeapSpace rhs = HeapReserver::reserve(100 * granularity, granularity, os::vm_page_size(), nullptr);
310
311 // Check if constraints are complied
312 if (!( UseCompressedOops && rhs.is_reserved() &&
313 CompressedOops::base() != nullptr &&
314 CompressedOops::use_implicit_null_checks() )) {
315 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
316 "\tUseCompressedOops is %d\n"
317 "\trhs.base() is " PTR_FORMAT "\n"
318 "\tCompressedOops::base() is " PTR_FORMAT "\n"
319 "\tCompressedOops::use_implicit_null_checks() is %d",
320 UseCompressedOops,
321 p2i(rhs.base()),
322 p2i(CompressedOops::base()),
323 CompressedOops::use_implicit_null_checks());
324 return;
325 }
326
327 VirtualSpace vs;
328 vs.initialize(rhs, 50 * granularity);
329
330 tty->print_cr("Reading from no access area... ");
331 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
332 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
333 WB_END
334
335 WB_ENTRY(void, WB_DecodeNKlassAndAccessKlass(JNIEnv* env, jobject o, jint nKlass))
336 assert(UseCompressedClassPointers, "Should only call for UseCompressedClassPointers");
337 const narrowKlass nk = (narrowKlass)nKlass;
338 const Klass* const k = CompressedKlassPointers::decode_not_null_without_asserts(nKlass);
339 printf("WB_DecodeNKlassAndAccessKlass: nk %u k " PTR_FORMAT "\n", nk, p2i(k));
340 printf("Will attempt to crash now...\n");
341 fflush(stdout); // flush now - we will crash below
342 // Access k by calling a virtual function - will result in loading the vtable from *k
343 k->print_on(tty);
344 WB_END
345
346 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
347 size_t magnitude, size_t iterations) {
348 size_t granularity = os::vm_allocation_granularity();
349 ReservedHeapSpace rhs = HeapReserver::reserve(reserved_space_size * granularity, granularity, os::vm_page_size(), nullptr);
350 if (!rhs.is_reserved()) {
351 tty->print_cr("Failed to initialize ReservedSpace. Can't proceed.");
352 return 3;
353 }
354
355 VirtualSpace vs;
356 if (!vs.initialize(rhs, 0)) {
357 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
358 return 3;
359 }
360
361 int seed = os::random();
362 tty->print_cr("Random seed is %d", seed);
363
364 for (size_t i = 0; i < iterations; i++) {
365
366 // Whether we will shrink or grow
367 bool shrink = os::random() % 2L == 0;
368
369 // Get random delta to resize virtual space
370 size_t delta = (size_t)os::random() % magnitude;
371
372 // If we are about to shrink virtual space below zero, then expand instead
373 if (shrink && vs.committed_size() < delta) {
374 shrink = false;
375 }
376
377 // Resizing by delta
378 if (shrink) {
379 vs.shrink_by(delta);
380 } else {
381 // If expanding fails expand_by will silently return false
382 vs.expand_by(delta, true);
383 }
384 }
385 return 0;
386 }
387
388 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
389 jlong reserved_space_size, jlong magnitude, jlong iterations))
390 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
391 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
392 iterations);
393 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
394 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
395 return 1;
396 }
397
398 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
399 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
400 if (sizeof(size_t) < sizeof(jlong)) {
401 jlong size_t_max_value = (jlong)SIZE_MAX;
402 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
403 || iterations > size_t_max_value) {
404 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
405 return 2;
406 }
407 }
408
409 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
410 (size_t) magnitude, (size_t) iterations);
411 WB_END
412
413 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
414 return GCConfig::is_gc_supported((CollectedHeap::Name)name);
415 WB_END
416
417 WB_ENTRY(jboolean, WB_HasLibgraal(JNIEnv* env, jobject o))
418 #if INCLUDE_JVMCI
419 return JVMCI::shared_library_exists();
420 #endif
421 return false;
422 WB_END
423
424 WB_ENTRY(jboolean, WB_IsGCSupportedByJVMCICompiler(JNIEnv* env, jobject o, jint name))
425 #if INCLUDE_JVMCI
426 if (EnableJVMCI) {
427 // Enter the JVMCI env that will be used by the CompileBroker.
428 JVMCIEnv jvmciEnv(thread, __FILE__, __LINE__);
429 return jvmciEnv.init_error() == JNI_OK && jvmciEnv.runtime()->is_gc_supported(&jvmciEnv, (CollectedHeap::Name)name);
430 }
431 #endif
432 return false;
433 WB_END
434
435 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
436 return GCConfig::is_gc_selected((CollectedHeap::Name)name);
437 WB_END
438
439 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
440 return GCConfig::is_gc_selected_ergonomically();
441 WB_END
442
443 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
444 oop p = JNIHandles::resolve(obj);
445 #if INCLUDE_G1GC
446 if (UseG1GC) {
447 G1CollectedHeap* g1h = G1CollectedHeap::heap();
448 const G1HeapRegion* hr = g1h->heap_region_containing(p);
449 return hr->is_old_or_humongous();
450 }
451 #endif
452 #if INCLUDE_PARALLELGC
453 if (UseParallelGC) {
454 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
455 return !psh->is_in_young(p);
456 }
457 #endif
458 #if INCLUDE_ZGC
459 if (UseZGC) {
460 return ZHeap::heap()->is_old(to_zaddress(p));
461 }
462 #endif
463 #if INCLUDE_SHENANDOAHGC
464 if (UseShenandoahGC) {
465 ShenandoahHeap* sh = ShenandoahHeap::heap();
466 return sh->mode()->is_generational() ? sh->is_in_old(p) : sh->is_in(p);
467 }
468 #endif
469 #if INCLUDE_SERIALGC
470 if (UseSerialGC) {
471 return !SerialHeap::heap()->is_in_young(p);
472 }
473 #endif
474 ShouldNotReachHere();
475 return false;
476 WB_END
477
478 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
479 oop p = JNIHandles::resolve(obj);
480 return p->size() * HeapWordSize;
481 WB_END
482
483 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
484 return (jlong)SpaceAlignment;
485 WB_END
486
487 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
488 return (jlong)HeapAlignment;
489 WB_END
490
491 WB_ENTRY(jboolean, WB_SupportsConcurrentGCBreakpoints(JNIEnv* env, jobject o))
492 return Universe::heap()->supports_concurrent_gc_breakpoints();
493 WB_END
494
495 WB_ENTRY(void, WB_ConcurrentGCAcquireControl(JNIEnv* env, jobject o))
496 ConcurrentGCBreakpoints::acquire_control();
497 WB_END
498
499 WB_ENTRY(void, WB_ConcurrentGCReleaseControl(JNIEnv* env, jobject o))
500 ConcurrentGCBreakpoints::release_control();
501 WB_END
502
503 WB_ENTRY(void, WB_ConcurrentGCRunToIdle(JNIEnv* env, jobject o))
504 ConcurrentGCBreakpoints::run_to_idle();
505 WB_END
506
507 WB_ENTRY(jboolean, WB_ConcurrentGCRunTo(JNIEnv* env, jobject o, jobject at))
508 Handle h_name(THREAD, JNIHandles::resolve(at));
509 ResourceMark rm;
510 const char* c_name = java_lang_String::as_utf8_string(h_name());
511 return ConcurrentGCBreakpoints::run_to(c_name);
512 WB_END
513
514 WB_ENTRY(jboolean, WB_ShipDebugInfoFull(JNIEnv* env, jobject o))
515 #if defined(SHIP_DEBUGINFO_FULL)
516 return true;
517 #else
518 return false;
519 #endif
520 WB_END
521
522 WB_ENTRY(jboolean, WB_ShipDebugInfoPublic(JNIEnv* env, jobject o))
523 #if defined(SHIP_DEBUGINFO_PUBLIC)
524 return true;
525 #else
526 return false;
527 #endif
528 WB_END
529
530 #if INCLUDE_G1GC
531
532 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
533 if (UseG1GC) {
534 G1CollectedHeap* g1h = G1CollectedHeap::heap();
535 oop result = JNIHandles::resolve(obj);
536 const G1HeapRegion* hr = g1h->heap_region_containing(result);
537 return hr->is_humongous();
538 }
539 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
540 WB_END
541
542 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
543 if (UseG1GC) {
544 G1CollectedHeap* g1h = G1CollectedHeap::heap();
545 const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
546 return hr->is_humongous();
547 }
548 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
549 WB_END
550
551 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
552 if (UseG1GC) {
553 G1CollectedHeap* g1h = G1CollectedHeap::heap();
554 const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
555 return hr->is_free();
556 }
557 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
558 WB_END
559
560 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
561 if (UseG1GC) {
562 G1CollectedHeap* g1h = G1CollectedHeap::heap();
563 size_t nr = g1h->max_num_regions();
564 return (jlong)nr;
565 }
566 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
567 WB_END
568
569 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
570 if (UseG1GC) {
571 G1CollectedHeap* g1h = G1CollectedHeap::heap();
572 size_t nr = g1h->num_free_regions();
573 return (jlong)nr;
574 }
575 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
576 WB_END
577
578 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
579 if (UseG1GC) {
580 G1CollectedHeap* g1h = G1CollectedHeap::heap();
581 return g1h->concurrent_mark()->cm_thread()->in_progress();
582 }
583 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
584 WB_END
585
586 WB_ENTRY(jint, WB_G1CompletedConcurrentMarkCycles(JNIEnv* env, jobject o))
587 if (UseG1GC) {
588 G1CollectedHeap* g1h = G1CollectedHeap::heap();
589 G1ConcurrentMark* cm = g1h->concurrent_mark();
590 return cm->completed_mark_cycles();
591 }
592 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1CompletedConcurrentMarkCycles: G1 GC is not enabled");
593 WB_END
594
595 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
596 if (UseG1GC) {
597 return (jint)G1HeapRegion::GrainBytes;
598 }
599 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
600 WB_END
601
602 WB_ENTRY(jboolean, WB_G1HasRegionsToUncommit(JNIEnv* env, jobject o))
603 if (UseG1GC) {
604 return G1CollectedHeap::heap()->has_uncommittable_regions();
605 }
606 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1HasRegionsToUncommit: G1 GC is not enabled");
607 WB_END
608
609 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
610 if (UseG1GC) {
611 ResourceMark rm(THREAD);
612 G1CollectedHeap* g1h = G1CollectedHeap::heap();
613 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
614 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
615 return JNIHandles::make_local(THREAD, h());
616 }
617 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
618 WB_END
619
620 WB_ENTRY(jint, WB_G1ActiveMemoryNodeCount(JNIEnv* env, jobject o))
621 if (UseG1GC) {
622 G1NUMA* numa = G1NUMA::numa();
623 return (jint)numa->num_active_nodes();
624 }
625 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1ActiveMemoryNodeCount: G1 GC is not enabled");
626 WB_END
627
628 WB_ENTRY(jintArray, WB_G1MemoryNodeIds(JNIEnv* env, jobject o))
629 if (UseG1GC) {
630 G1NUMA* numa = G1NUMA::numa();
631 int num_node_ids = checked_cast<int>(numa->num_active_nodes());
632 const uint* node_ids = numa->node_ids();
633
634 typeArrayOop result = oopFactory::new_intArray(num_node_ids, CHECK_NULL);
635 for (int i = 0; i < num_node_ids; i++) {
636 result->int_at_put(i, checked_cast<jint>(node_ids[i]));
637 }
638 return (jintArray) JNIHandles::make_local(THREAD, result);
639 }
640 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1MemoryNodeIds: G1 GC is not enabled");
641 WB_END
642
643 class OldRegionsLivenessClosure: public G1HeapRegionClosure {
644
645 private:
646 const int _liveness;
647 size_t _total_count;
648 size_t _total_memory;
649 size_t _total_memory_to_free;
650
651 public:
652 OldRegionsLivenessClosure(int liveness) :
653 _liveness(liveness),
654 _total_count(0),
655 _total_memory(0),
656 _total_memory_to_free(0) { }
657
658 size_t total_count() { return _total_count; }
659 size_t total_memory() { return _total_memory; }
660 size_t total_memory_to_free() { return _total_memory_to_free; }
661
662 bool do_heap_region(G1HeapRegion* r) {
663 if (r->is_old()) {
664 size_t live = r->live_bytes();
665 size_t size = r->used();
666 size_t reg_size = G1HeapRegion::GrainBytes;
667 if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
668 _total_memory += size;
669 ++_total_count;
670 if (size == reg_size) {
671 // We don't include non-full regions since they are unlikely included in mixed gc
672 // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
673 _total_memory_to_free += size - live;
674 }
675 }
676 }
677 return false;
678 }
679 };
680
681
682 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
683 if (!UseG1GC) {
684 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
685 }
686 if (liveness < 0) {
687 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
688 }
689
690 G1CollectedHeap* g1h = G1CollectedHeap::heap();
691 OldRegionsLivenessClosure rli(liveness);
692 g1h->heap_region_iterate(&rli);
693
694 typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
695 result->long_at_put(0, rli.total_count());
696 result->long_at_put(1, rli.total_memory());
697 result->long_at_put(2, rli.total_memory_to_free());
698 return (jlongArray) JNIHandles::make_local(THREAD, result);
699 WB_END
700
701 #endif // INCLUDE_G1GC
702
703 // Alloc memory using the test memory tag so that we can use that to see if
704 // NMT picks it up correctly
705 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
706 jlong addr = 0;
707 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
708 return addr;
709 WB_END
710
711 // Alloc memory with pseudo call stack. The test can create pseudo malloc
712 // allocation site to stress the malloc tracking.
713 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
714 address pc = (address)(size_t)pseudo_stack;
715 NativeCallStack stack(&pc, 1);
716 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
717 WB_END
718
719 // Alloc memory with pseudo call stack and specific memory tag.
720 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint mem_tag))
721 address pc = (address)(size_t)pseudo_stack;
722 NativeCallStack stack(&pc, 1);
723 return (jlong)(uintptr_t)os::malloc(size, (MemTag)mem_tag, stack);
724 WB_END
725
726 // Free the memory allocated by NMTAllocTest
727 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
728 os::free((void*)(uintptr_t)mem);
729 WB_END
730
731 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
732 return (jlong)(uintptr_t)os::reserve_memory(size, mtTest);
733 WB_END
734
735 WB_ENTRY(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
736 return (jlong)(uintptr_t)os::attempt_reserve_memory_at((char*)(uintptr_t)addr, (size_t)size, mtTest);
737 WB_END
738
739 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
740 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
741 WB_END
742
743 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
744 os::uncommit_memory((char *)(uintptr_t)addr, size);
745 WB_END
746
747 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
748 os::release_memory((char *)(uintptr_t)addr, size);
749 WB_END
750
751 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
752 int hash_size = MallocSiteTable::hash_buckets();
753 assert(hash_size > 0, "NMT hash_size should be > 0");
754 return (jint)hash_size;
755 WB_END
756
757 WB_ENTRY(jlong, WB_NMTNewArena(JNIEnv* env, jobject o, jlong init_size))
758 Arena* arena = new (mtTest) Arena(mtTest, Arena::Tag::tag_other, size_t(init_size));
759 return (jlong)arena;
760 WB_END
761
762 WB_ENTRY(void, WB_NMTFreeArena(JNIEnv* env, jobject o, jlong arena))
763 Arena* a = (Arena*)arena;
764 delete a;
765 WB_END
766
767 WB_ENTRY(void, WB_NMTArenaMalloc(JNIEnv* env, jobject o, jlong arena, jlong size))
768 Arena* a = (Arena*)arena;
769 a->Amalloc(size_t(size));
770 WB_END
771
772 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
773 assert(method != nullptr, "method should not be null");
774 ThreadToNativeFromVM ttn(thread);
775 return env->FromReflectedMethod(method);
776 }
777
778 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
779 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
780 private:
781 int _result;
782 const bool _make_not_entrant;
783 public:
784 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
785 _result(0), _make_not_entrant(make_not_entrant) { }
786 int result() const { return _result; }
787
788 void doit() {
789 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
790 if (t->has_last_Java_frame()) {
791 for (StackFrameStream fst(t, false /* update */, true /* process_frames */); !fst.is_done(); fst.next()) {
792 frame* f = fst.current();
793 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
794 Deoptimization::deoptimize(t, *f);
795 if (_make_not_entrant) {
796 nmethod* nm = CodeCache::find_nmethod(f->pc());
797 assert(nm != nullptr, "did not find nmethod");
798 nm->make_not_entrant(nmethod::InvalidationReason::WHITEBOX_DEOPTIMIZATION);
799 }
800 ++_result;
801 }
802 }
803 }
804 }
805 }
806 };
807
808 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
809 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
810 VMThread::execute(&op);
811 return op.result();
812 WB_END
813
814 WB_ENTRY(jboolean, WB_IsFrameDeoptimized(JNIEnv* env, jobject o, jint depth))
815 bool result = false;
816 if (thread->has_last_Java_frame()) {
817 ResourceMark rm(THREAD);
818 RegisterMap reg_map(thread,
819 RegisterMap::UpdateMap::include,
820 RegisterMap::ProcessFrames::include,
821 RegisterMap::WalkContinuation::skip);
822 javaVFrame *jvf = thread->last_java_vframe(®_map);
823 for (jint d = 0; d < depth && jvf != nullptr; d++) {
824 jvf = jvf->java_sender();
825 }
826 result = jvf != nullptr && jvf->fr().is_deoptimized_frame();
827 }
828 return result;
829 WB_END
830
831 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
832 DeoptimizationScope deopt_scope;
833 CodeCache::mark_all_nmethods_for_deoptimization(&deopt_scope);
834 deopt_scope.deoptimize_marked();
835 WB_END
836
837 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
838 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
839 int result = 0;
840 CHECK_JNI_EXCEPTION_(env, result);
841
842 DeoptimizationScope deopt_scope;
843 {
844 MutexLocker mu(Compile_lock);
845 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
846 if (is_osr) {
847 result += mh->method_holder()->mark_osr_nmethods(&deopt_scope, mh());
848 } else {
849 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
850 if (mh->code() != nullptr) {
851 deopt_scope.mark(mh->code());
852 ++result;
853 }
854 }
855 CodeCache::mark_for_deoptimization(&deopt_scope, mh());
856 }
857
858 deopt_scope.deoptimize_marked();
859
860 return result;
861 WB_END
862
863 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
864 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
865 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
866 MutexLocker mu(Compile_lock);
867 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
868 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
869 if (code == nullptr) {
870 return JNI_FALSE;
871 }
872 return !code->is_marked_for_deoptimization();
873 WB_END
874
875 static bool is_excluded_for_compiler(AbstractCompiler* comp, methodHandle& mh) {
876 if (comp == nullptr) {
877 return true;
878 }
879 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
880 bool exclude = directive->ExcludeOption;
881 DirectivesStack::release(directive);
882 return exclude;
883 }
884
885 static bool can_be_compiled_at_level(methodHandle& mh, jboolean is_osr, int level) {
886 if (is_osr) {
887 return CompilationPolicy::can_be_osr_compiled(mh, level);
888 } else {
889 return CompilationPolicy::can_be_compiled(mh, level);
890 }
891 }
892
893 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
894 if (method == nullptr || comp_level > CompilationPolicy::highest_compile_level()) {
895 return false;
896 }
897 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
898 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
899 MutexLocker mu(Compile_lock);
900 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
901
902 // The ExcludeOption directive is evaluated lazily upon compilation attempt. If a method was not tried to be compiled by
903 // a compiler, yet, the method object is not set to be not compilable by that compiler. Thus, evaluate the compiler directive
904 // to exclude a compilation of 'method'.
905 if (comp_level == CompLevel_any) {
906 // Both compilers could have ExcludeOption set. Check all combinations.
907 bool excluded_c1 = is_excluded_for_compiler(CompileBroker::compiler1(), mh);
908 bool excluded_c2 = is_excluded_for_compiler(CompileBroker::compiler2(), mh);
909 if (excluded_c1 && excluded_c2) {
910 // Compilation of 'method' excluded by both compilers.
911 return false;
912 }
913
914 if (excluded_c1) {
915 // C1 only has ExcludeOption set: Check if compilable with C2.
916 return can_be_compiled_at_level(mh, is_osr, CompLevel_full_optimization);
917 } else if (excluded_c2) {
918 // C2 only has ExcludeOption set: Check if compilable with C1.
919 return can_be_compiled_at_level(mh, is_osr, CompLevel_simple);
920 }
921 } else if (comp_level > CompLevel_none && is_excluded_for_compiler(CompileBroker::compiler((int)comp_level), mh)) {
922 // Compilation of 'method' excluded by compiler used for 'comp_level'.
923 return false;
924 }
925
926 return can_be_compiled_at_level(mh, is_osr, (int)comp_level);
927 WB_END
928
929 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
930 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
931 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
932 MutexLocker mu(Compile_lock);
933 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
934 return mh->queued_for_compilation();
935 WB_END
936
937 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
938 if (compLevel < CompLevel_none || compLevel > CompilationPolicy::highest_compile_level()) {
939 return false; // Intrinsic is not available on a non-existent compilation level.
940 }
941 AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
942 if (comp == nullptr) {
943 // Could have compLevel == 0, or !TieredCompilation and incompatible values of TieredStopAtLevel and compLevel.
944 tty->print_cr("WB error: no compiler for requested compilation level %d", compLevel);
945 return false;
946 }
947
948 jmethodID method_id, compilation_context_id;
949 method_id = reflected_method_to_jmid(thread, env, method);
950 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
951 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
952
953 DirectiveSet* directive;
954 if (compilation_context != nullptr) {
955 compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
956 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
957 methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
958 directive = DirectivesStack::getMatchingDirective(cch, comp);
959 } else {
960 // Calling with null matches default directive
961 directive = DirectivesStack::getDefaultDirective(comp);
962 }
963 bool result = comp->is_intrinsic_available(mh, directive);
964 DirectivesStack::release(directive);
965 return result;
966 WB_END
967
968 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
969 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
970 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
971 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
972 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
973 return (code != nullptr ? code->comp_level() : CompLevel_none);
974 WB_END
975
976 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
977 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
978 CHECK_JNI_EXCEPTION(env);
979 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
980 if (is_osr) {
981 mh->set_not_osr_compilable("WhiteBox", comp_level);
982 } else {
983 mh->set_not_compilable("WhiteBox", comp_level);
984 }
985 WB_END
986
987 WB_ENTRY(jint, WB_GetMethodDecompileCount(JNIEnv* env, jobject o, jobject method))
988 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
989 CHECK_JNI_EXCEPTION_(env, 0);
990 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
991 uint cnt = 0;
992 MethodData* mdo = mh->method_data();
993 if (mdo != nullptr) {
994 cnt = mdo->decompile_count();
995 }
996 return cnt;
997 WB_END
998
999 // Get the trap count of a method for a specific reason. If the trap count for
1000 // that reason did overflow, this includes the overflow trap count of the method.
1001 // If 'reason' is null, the sum of the traps for all reasons will be returned.
1002 // This number includes the overflow trap count if the trap count for any reason
1003 // did overflow.
1004 WB_ENTRY(jint, WB_GetMethodTrapCount(JNIEnv* env, jobject o, jobject method, jstring reason_obj))
1005 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1006 CHECK_JNI_EXCEPTION_(env, 0);
1007 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1008 uint cnt = 0;
1009 MethodData* mdo = mh->method_data();
1010 if (mdo != nullptr) {
1011 ResourceMark rm(THREAD);
1012 char* reason_str = (reason_obj == nullptr) ?
1013 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1014 bool overflow = false;
1015 for (uint reason = 0; reason < mdo->trap_reason_limit(); reason++) {
1016 if (reason_str != nullptr && !strcmp(reason_str, Deoptimization::trap_reason_name(reason))) {
1017 cnt = mdo->trap_count(reason);
1018 // Count in the overflow trap count on overflow
1019 if (cnt == (uint)-1) {
1020 cnt = mdo->trap_count_limit() + mdo->overflow_trap_count();
1021 }
1022 break;
1023 } else if (reason_str == nullptr) {
1024 uint c = mdo->trap_count(reason);
1025 if (c == (uint)-1) {
1026 c = mdo->trap_count_limit();
1027 if (!overflow) {
1028 // Count overflow trap count just once
1029 overflow = true;
1030 c += mdo->overflow_trap_count();
1031 }
1032 }
1033 cnt += c;
1034 }
1035 }
1036 }
1037 return cnt;
1038 WB_END
1039
1040 WB_ENTRY(jint, WB_GetDeoptCount(JNIEnv* env, jobject o, jstring reason_obj, jstring action_obj))
1041 if (reason_obj == nullptr && action_obj == nullptr) {
1042 return Deoptimization::total_deoptimization_count();
1043 }
1044 ResourceMark rm(THREAD);
1045 const char *reason_str = (reason_obj == nullptr) ?
1046 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1047 const char *action_str = (action_obj == nullptr) ?
1048 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(action_obj));
1049
1050 return Deoptimization::deoptimization_count(reason_str, action_str);
1051 WB_END
1052
1053 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
1054 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1055 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
1056 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1057 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
1058 return (code != nullptr && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
1059 WB_END
1060
1061 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(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->dont_inline();
1066 mh->set_dont_inline(value == JNI_TRUE);
1067 return result;
1068 WB_END
1069
1070 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
1071 if (comp_level == CompLevel_any) {
1072 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
1073 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
1074 } else {
1075 return CompileBroker::queue_size(comp_level);
1076 }
1077 WB_END
1078
1079 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1080 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1081 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1082 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1083 bool result = mh->force_inline();
1084 mh->set_force_inline(value == JNI_TRUE);
1085 return result;
1086 WB_END
1087
1088 #ifdef LINUX
1089 bool WhiteBox::validate_cgroup(bool cgroups_v2_enabled,
1090 const char* controllers_file,
1091 const char* proc_self_cgroup,
1092 const char* proc_self_mountinfo,
1093 u1* cg_flags) {
1094 CgroupInfo cg_infos[CG_INFO_LENGTH];
1095 return CgroupSubsystemFactory::determine_type(cg_infos, cgroups_v2_enabled, controllers_file,
1096 proc_self_cgroup,
1097 proc_self_mountinfo, cg_flags);
1098 }
1099 #endif
1100
1101 bool WhiteBox::is_asan_enabled() {
1102 #ifdef ADDRESS_SANITIZER
1103 return true;
1104 #else
1105 return false;
1106 #endif
1107 }
1108
1109 bool WhiteBox::is_ubsan_enabled() {
1110 #ifdef UNDEFINED_BEHAVIOR_SANITIZER
1111 return true;
1112 #else
1113 return false;
1114 #endif
1115 }
1116
1117 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, JavaThread* THREAD) {
1118 // Screen for unavailable/bad comp level or null method
1119 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1120 if (method == nullptr) {
1121 tty->print_cr("WB error: request to compile null method");
1122 return false;
1123 }
1124 if (method->is_abstract()) {
1125 tty->print_cr("WB error: request to compile abstract method");
1126 return false;
1127 }
1128 if (comp_level > CompilationPolicy::highest_compile_level()) {
1129 tty->print_cr("WB error: invalid compilation level %d", comp_level);
1130 return false;
1131 }
1132 if (comp == nullptr) {
1133 tty->print_cr("WB error: no compiler for requested compilation level %d", comp_level);
1134 return false;
1135 }
1136
1137 // Check if compilation is blocking
1138 methodHandle mh(THREAD, method);
1139 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
1140 bool is_blocking = !directive->BackgroundCompilationOption;
1141 DirectivesStack::release(directive);
1142
1143 // Compile method and check result
1144 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh->invocation_count(), CompileTask::Reason_Whitebox, CHECK_false);
1145 MutexLocker mu(THREAD, Compile_lock);
1146 bool is_queued = mh->queued_for_compilation();
1147 if ((!is_blocking && is_queued) || nm != nullptr) {
1148 return true;
1149 }
1150 // Check code again because compilation may be finished before Compile_lock is acquired.
1151 if (bci == InvocationEntryBci) {
1152 nmethod* code = mh->code();
1153 if (code != nullptr) {
1154 return true;
1155 }
1156 } else if (mh->lookup_osr_nmethod_for(bci, comp_level, false) != nullptr) {
1157 return true;
1158 }
1159 tty->print("WB error: failed to %s compile at level %d method ", is_blocking ? "blocking" : "", comp_level);
1160 mh->print_short_name(tty);
1161 tty->cr();
1162 if (is_blocking && is_queued) {
1163 tty->print_cr("WB error: blocking compilation is still in queue!");
1164 }
1165 return false;
1166 }
1167
1168 size_t WhiteBox::get_in_use_monitor_count() {
1169 return ObjectSynchronizer::_in_use_list.count();
1170 }
1171
1172 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1173 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1174 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1175 return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1176 WB_END
1177
1178 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1179 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1180 Method* clinit = ik->class_initializer();
1181 if (clinit == nullptr || clinit->method_holder()->is_not_initialized()) {
1182 return false;
1183 }
1184 return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1185 WB_END
1186
1187 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1188 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1189 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1190
1191 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1192 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
1193 bool result = directive->PrintAssemblyOption;
1194 DirectivesStack::release(directive);
1195
1196 return result;
1197 WB_END
1198
1199 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1200 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1201 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1202
1203 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1204
1205 ResourceMark rm(THREAD);
1206 const char* error_msg = nullptr;
1207 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1208 InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1209
1210 if (m == nullptr) {
1211 assert(error_msg != nullptr, "Always have an error message");
1212 tty->print_cr("Got error: %s", error_msg);
1213 return -1; // Pattern failed
1214 }
1215
1216 // Pattern works - now check if it matches
1217 int result;
1218 if (m->match(mh, InlineMatcher::force_inline)) {
1219 result = 2; // Force inline match
1220 } else if (m->match(mh, InlineMatcher::dont_inline)) {
1221 result = 1; // Dont inline match
1222 } else {
1223 result = 0; // No match
1224 }
1225 delete m;
1226 return result;
1227 WB_END
1228
1229 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1230 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1231 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1232
1233 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1234
1235 ResourceMark rm;
1236 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1237
1238 const char* error_msg = nullptr;
1239
1240 BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg, false);
1241 if (m == nullptr) {
1242 assert(error_msg != nullptr, "Must have error_msg");
1243 tty->print_cr("Got error: %s", error_msg);
1244 return -1;
1245 }
1246
1247 // Pattern works - now check if it matches
1248 int result = m->matches(mh);
1249 delete m;
1250 assert(result == 0 || result == 1, "Result out of range");
1251 return result;
1252 WB_END
1253
1254 WB_ENTRY(void, WB_MarkMethodProfiled(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
1259 MethodData* mdo = mh->method_data();
1260 if (mdo == nullptr) {
1261 Method::build_profiling_method_data(mh, CHECK_AND_CLEAR);
1262 mdo = mh->method_data();
1263 }
1264 mdo->init();
1265 InvocationCounter* icnt = mdo->invocation_counter();
1266 InvocationCounter* bcnt = mdo->backedge_counter();
1267 // set i-counter according to CompilationPolicy::is_method_profiled
1268 icnt->set(Tier4MinInvocationThreshold);
1269 bcnt->set(Tier4CompileThreshold);
1270 WB_END
1271
1272 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1273 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1274 CHECK_JNI_EXCEPTION(env);
1275 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1276 MutexLocker mu(THREAD, Compile_lock);
1277 MethodData* mdo = mh->method_data();
1278 MethodCounters* mcs = mh->method_counters();
1279
1280 if (mdo != nullptr) {
1281 mdo->init();
1282 ResourceMark rm(THREAD);
1283 int arg_count = mdo->method()->size_of_parameters();
1284 for (int i = 0; i < arg_count; i++) {
1285 mdo->set_arg_modified(i, 0);
1286 }
1287 mdo->clean_method_data(/*always_clean*/true);
1288 }
1289
1290 mh->clear_is_not_c1_compilable();
1291 mh->clear_is_not_c2_compilable();
1292 mh->clear_is_not_c2_osr_compilable();
1293 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1294 if (mcs != nullptr) {
1295 mcs->clear_counters();
1296 }
1297 WB_END
1298
1299 template <typename T, int type_enum>
1300 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1301 if (name == nullptr) {
1302 return false;
1303 }
1304 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1305 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1306 CHECK_JNI_EXCEPTION_(env, false);
1307 const JVMFlag* flag = JVMFlag::find_declared_flag(flag_name);
1308 JVMFlag::Error result = JVMFlagAccess::get<T, type_enum>(flag, value);
1309 env->ReleaseStringUTFChars(name, flag_name);
1310 return (result == JVMFlag::SUCCESS);
1311 }
1312
1313 template <typename T, int type_enum>
1314 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1315 if (name == nullptr) {
1316 return false;
1317 }
1318 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1319 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1320 CHECK_JNI_EXCEPTION_(env, false);
1321 JVMFlag* flag = JVMFlag::find_flag(flag_name);
1322 JVMFlag::Error result = JVMFlagAccess::set<T, type_enum>(flag, value, JVMFlagOrigin::INTERNAL);
1323 env->ReleaseStringUTFChars(name, flag_name);
1324 return (result == JVMFlag::SUCCESS);
1325 }
1326
1327 template <typename T>
1328 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1329 ResourceMark rm(thread);
1330 jclass clazz = env->FindClass(name->as_C_string());
1331 CHECK_JNI_EXCEPTION_(env, nullptr);
1332 jmethodID methodID = env->GetStaticMethodID(clazz,
1333 vmSymbols::valueOf_name()->as_C_string(),
1334 sig->as_C_string());
1335 CHECK_JNI_EXCEPTION_(env, nullptr);
1336 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1337 CHECK_JNI_EXCEPTION_(env, nullptr);
1338 return result;
1339 }
1340
1341 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1342 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1343 }
1344 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1345 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1346 }
1347 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1348 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1349 }
1350 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1351 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1352 }*/
1353 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1354 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1355 }
1356
1357 static const JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1358 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1359 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1360 CHECK_JNI_EXCEPTION_(env, nullptr);
1361 const JVMFlag* result = JVMFlag::find_declared_flag(flag_name);
1362 env->ReleaseStringUTFChars(name, flag_name);
1363 return result;
1364 }
1365
1366 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1367 const JVMFlag* flag = getVMFlag(thread, env, name);
1368 return (flag != nullptr) && flag->is_constant_in_binary();
1369 WB_END
1370
1371 WB_ENTRY(jboolean, WB_IsDefaultVMFlag(JNIEnv* env, jobject o, jstring name))
1372 const JVMFlag* flag = getVMFlag(thread, env, name);
1373 return (flag != nullptr) && flag->is_default();
1374 WB_END
1375
1376 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1377 const JVMFlag* flag = getVMFlag(thread, env, name);
1378 return (flag != nullptr) && !(flag->is_unlocked() || flag->is_unlocker());
1379 WB_END
1380
1381 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1382 bool result;
1383 if (GetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result)) {
1384 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1385 return booleanBox(thread, env, result);
1386 }
1387 return nullptr;
1388 WB_END
1389
1390 template <typename T, int type_enum>
1391 jobject GetVMFlag_longBox(JNIEnv* env, JavaThread* thread, jstring name) {
1392 T result;
1393 if (GetVMFlag <T, type_enum> (thread, env, name, &result)) {
1394 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1395 return longBox(thread, env, result);
1396 }
1397 return nullptr;
1398 }
1399
1400 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1401 return GetVMFlag_longBox<JVM_FLAG_TYPE(int)>(env, thread, name);
1402 WB_END
1403
1404 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1405 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint)>(env, thread, name);
1406 WB_END
1407
1408 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1409 return GetVMFlag_longBox<JVM_FLAG_TYPE(intx)>(env, thread, name);
1410 WB_END
1411
1412 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1413 return GetVMFlag_longBox<JVM_FLAG_TYPE(uintx)>(env, thread, name);
1414 WB_END
1415
1416 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1417 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint64_t)>(env, thread, name);
1418 WB_END
1419
1420 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1421 return GetVMFlag_longBox<JVM_FLAG_TYPE(size_t)>(env, thread, name);
1422 WB_END
1423
1424 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1425 double result;
1426 if (GetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result)) {
1427 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1428 return doubleBox(thread, env, result);
1429 }
1430 return nullptr;
1431 WB_END
1432
1433 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1434 ccstr ccstrResult;
1435 if (GetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &ccstrResult)) {
1436 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1437 jstring result = env->NewStringUTF(ccstrResult);
1438 CHECK_JNI_EXCEPTION_(env, nullptr);
1439 return result;
1440 }
1441 return nullptr;
1442 WB_END
1443
1444 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1445 bool result = value == JNI_TRUE ? true : false;
1446 SetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result);
1447 WB_END
1448
1449 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1450 int result = checked_cast<int>(value);
1451 SetVMFlag <JVM_FLAG_TYPE(int)> (thread, env, name, &result);
1452 WB_END
1453
1454 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1455 uint result = checked_cast<uint>(value);
1456 SetVMFlag <JVM_FLAG_TYPE(uint)> (thread, env, name, &result);
1457 WB_END
1458
1459 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1460 intx result = value;
1461 SetVMFlag <JVM_FLAG_TYPE(intx)> (thread, env, name, &result);
1462 WB_END
1463
1464 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1465 uintx result = value;
1466 SetVMFlag <JVM_FLAG_TYPE(uintx)> (thread, env, name, &result);
1467 WB_END
1468
1469 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1470 uint64_t result = value;
1471 SetVMFlag <JVM_FLAG_TYPE(uint64_t)> (thread, env, name, &result);
1472 WB_END
1473
1474 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1475 size_t result = value;
1476 SetVMFlag <JVM_FLAG_TYPE(size_t)> (thread, env, name, &result);
1477 WB_END
1478
1479 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1480 double result = value;
1481 SetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result);
1482 WB_END
1483
1484 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1485 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1486 const char* ccstrValue;
1487 if (value == nullptr) {
1488 ccstrValue = nullptr;
1489 }
1490 else {
1491 ccstrValue = env->GetStringUTFChars(value, nullptr);
1492 CHECK_JNI_EXCEPTION(env);
1493 }
1494 {
1495 ccstr param = ccstrValue;
1496 ThreadInVMfromNative ttvfn(thread); // back to VM
1497 if (SetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, ¶m)) {
1498 assert(param == nullptr, "old value is freed automatically and not returned");
1499 }
1500 }
1501 if (value != nullptr) {
1502 env->ReleaseStringUTFChars(value, ccstrValue);
1503 }
1504 WB_END
1505
1506 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1507 WhiteBox::compilation_locked = true;
1508 WB_END
1509
1510 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1511 MonitorLocker mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1512 WhiteBox::compilation_locked = false;
1513 mo.notify_all();
1514 WB_END
1515
1516 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1517 ResourceMark rm(THREAD);
1518 int len;
1519 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1520 return (StringTable::lookup(name, len) != nullptr);
1521 WB_END
1522
1523 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1524 Universe::heap()->collect(GCCause::_wb_full_gc);
1525 WB_END
1526
1527 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1528 Universe::heap()->collect(GCCause::_wb_young_gc);
1529 WB_END
1530
1531 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1532 // static+volatile in order to force the read to happen
1533 // (not be eliminated by the compiler)
1534 static char c;
1535 static volatile char* p;
1536
1537 p = os::reserve_memory(os::vm_allocation_granularity(), mtTest);
1538 if (p == nullptr) {
1539 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1540 }
1541
1542 c = *p;
1543 WB_END
1544
1545 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1546 const char* features = VM_Version::cpu_info_string();
1547 ThreadToNativeFromVM ttn(thread);
1548 jstring features_string = env->NewStringUTF(features);
1549
1550 CHECK_JNI_EXCEPTION_(env, nullptr);
1551
1552 return features_string;
1553 WB_END
1554
1555 CodeBlobType WhiteBox::get_blob_type(const CodeBlob* code) {
1556 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1557 return CodeCache::get_code_heap(code)->code_blob_type();
1558 }
1559
1560 CodeHeap* WhiteBox::get_code_heap(CodeBlobType blob_type) {
1561 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1562 return CodeCache::get_code_heap(blob_type);
1563 }
1564
1565 struct CodeBlobStub {
1566 CodeBlobStub(const CodeBlob* blob) :
1567 name(os::strdup(blob->name())),
1568 size(blob->size()),
1569 blob_type(static_cast<jint>(WhiteBox::get_blob_type(blob))),
1570 address((jlong) blob),
1571 code_begin((jlong) blob->code_begin()),
1572 is_nmethod((jboolean) blob->is_nmethod()) { }
1573 ~CodeBlobStub() { os::free((void*) name); }
1574 const char* const name;
1575 const jint size;
1576 const jint blob_type;
1577 const jlong address;
1578 const jlong code_begin;
1579 const jboolean is_nmethod;
1580 };
1581
1582 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1583 ResourceMark rm;
1584 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1585 CHECK_JNI_EXCEPTION_(env, nullptr);
1586 jobjectArray result = env->NewObjectArray(6, clazz, nullptr);
1587
1588 jstring name = env->NewStringUTF(cb->name);
1589 CHECK_JNI_EXCEPTION_(env, nullptr);
1590 env->SetObjectArrayElement(result, 0, name);
1591
1592 jobject obj = integerBox(thread, env, cb->size);
1593 CHECK_JNI_EXCEPTION_(env, nullptr);
1594 env->SetObjectArrayElement(result, 1, obj);
1595
1596 obj = integerBox(thread, env, cb->blob_type);
1597 CHECK_JNI_EXCEPTION_(env, nullptr);
1598 env->SetObjectArrayElement(result, 2, obj);
1599
1600 obj = longBox(thread, env, cb->address);
1601 CHECK_JNI_EXCEPTION_(env, nullptr);
1602 env->SetObjectArrayElement(result, 3, obj);
1603
1604 obj = longBox(thread, env, cb->code_begin);
1605 CHECK_JNI_EXCEPTION_(env, nullptr);
1606 env->SetObjectArrayElement(result, 4, obj);
1607
1608 obj = booleanBox(thread, env, cb->is_nmethod);
1609 CHECK_JNI_EXCEPTION_(env, nullptr);
1610 env->SetObjectArrayElement(result, 5, obj);
1611
1612 return result;
1613 }
1614
1615 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1616 ResourceMark rm(THREAD);
1617 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1618 CHECK_JNI_EXCEPTION_(env, nullptr);
1619 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1620 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1621 jobjectArray result = nullptr;
1622 if (code == nullptr) {
1623 return result;
1624 }
1625 int comp_level = code->comp_level();
1626 int insts_size = code->insts_size();
1627
1628 ThreadToNativeFromVM ttn(thread);
1629 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1630 CHECK_JNI_EXCEPTION_(env, nullptr);
1631 result = env->NewObjectArray(5, clazz, nullptr);
1632 if (result == nullptr) {
1633 return result;
1634 }
1635
1636 CodeBlobStub stub(code);
1637 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1638 CHECK_JNI_EXCEPTION_(env, nullptr);
1639 env->SetObjectArrayElement(result, 0, codeBlob);
1640
1641 jobject level = integerBox(thread, env, comp_level);
1642 CHECK_JNI_EXCEPTION_(env, nullptr);
1643 env->SetObjectArrayElement(result, 1, level);
1644
1645 jbyteArray insts = env->NewByteArray(insts_size);
1646 CHECK_JNI_EXCEPTION_(env, nullptr);
1647 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1648 env->SetObjectArrayElement(result, 2, insts);
1649
1650 jobject id = integerBox(thread, env, code->compile_id());
1651 CHECK_JNI_EXCEPTION_(env, nullptr);
1652 env->SetObjectArrayElement(result, 3, id);
1653
1654 jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1655 CHECK_JNI_EXCEPTION_(env, nullptr);
1656 env->SetObjectArrayElement(result, 4, entry_point);
1657
1658 return result;
1659 WB_END
1660
1661 WB_ENTRY(void, WB_RelocateNMethodFromMethod(JNIEnv* env, jobject o, jobject method, jint blob_type))
1662 ResourceMark rm(THREAD);
1663 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1664 CHECK_JNI_EXCEPTION(env);
1665 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1666 nmethod* code = mh->code();
1667 if (code != nullptr) {
1668 MutexLocker ml_Compile_lock(Compile_lock);
1669 CompiledICLocker ic_locker(code);
1670 MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1671 code->relocate(static_cast<CodeBlobType>(blob_type));
1672 }
1673 WB_END
1674
1675 WB_ENTRY(void, WB_RelocateNMethodFromAddr(JNIEnv* env, jobject o, jlong addr, jint blob_type))
1676 ResourceMark rm(THREAD);
1677 CHECK_JNI_EXCEPTION(env);
1678 void* address = (void*) addr;
1679
1680 if (address == nullptr) {
1681 return;
1682 }
1683
1684 MutexLocker ml_Compile_lock(Compile_lock);
1685 MutexLocker ml_CompiledIC_lock(CompiledIC_lock, Mutex::_no_safepoint_check_flag);
1686 MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1687
1688 // Verify that nmethod address is still valid
1689 CodeBlob* blob = CodeCache::find_blob(address);
1690 if (blob != nullptr && blob->is_nmethod()) {
1691 nmethod* code = blob->as_nmethod();
1692 if (code->is_in_use() && !code->is_unloading()) {
1693 CompiledICLocker ic_locker(code);
1694 code->relocate(static_cast<CodeBlobType>(blob_type));
1695 }
1696 }
1697 WB_END
1698
1699 CodeBlob* WhiteBox::allocate_code_blob(int size, CodeBlobType blob_type) {
1700 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1701 BufferBlob* blob;
1702 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1703 if (full_size < size) {
1704 full_size += align_up(size - full_size, oopSize);
1705 }
1706 {
1707 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1708 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1709 if (blob != nullptr) {
1710 ::new (blob) BufferBlob("WB::DummyBlob", CodeBlobKind::Buffer, full_size);
1711 }
1712 }
1713 // Track memory usage statistic after releasing CodeCache_lock
1714 MemoryService::track_code_cache_memory_usage();
1715 return blob;
1716 }
1717
1718 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1719 if (size < 0) {
1720 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1721 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1722 }
1723 return (jlong) WhiteBox::allocate_code_blob(size, static_cast<CodeBlobType>(blob_type));
1724 WB_END
1725
1726 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1727 if (addr == 0) {
1728 return;
1729 }
1730 BufferBlob::free((BufferBlob*) addr);
1731 WB_END
1732
1733 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1734 ResourceMark rm;
1735 GrowableArray<CodeBlobStub*> blobs;
1736 {
1737 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1738 CodeHeap* heap = WhiteBox::get_code_heap(static_cast<CodeBlobType>(blob_type));
1739 if (heap == nullptr) {
1740 return nullptr;
1741 }
1742 for (CodeBlob* cb = (CodeBlob*) heap->first();
1743 cb != nullptr; cb = (CodeBlob*) heap->next(cb)) {
1744 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1745 new (stub) CodeBlobStub(cb);
1746 blobs.append(stub);
1747 }
1748 }
1749 ThreadToNativeFromVM ttn(thread);
1750 jobjectArray result = nullptr;
1751 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1752 CHECK_JNI_EXCEPTION_(env, nullptr);
1753 result = env->NewObjectArray(blobs.length(), clazz, nullptr);
1754 CHECK_JNI_EXCEPTION_(env, nullptr);
1755 if (result == nullptr) {
1756 return result;
1757 }
1758 int i = 0;
1759 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1760 it != blobs.end(); ++it) {
1761 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1762 CHECK_JNI_EXCEPTION_(env, nullptr);
1763 env->SetObjectArrayElement(result, i, obj);
1764 CHECK_JNI_EXCEPTION_(env, nullptr);
1765 ++i;
1766 }
1767 return result;
1768 WB_END
1769
1770 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1771 return CompileBroker::get_compilation_activity_mode();
1772 WB_END
1773
1774 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1775 if (addr == 0) {
1776 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1777 "WB_GetCodeBlob: addr is null");
1778 }
1779 ThreadToNativeFromVM ttn(thread);
1780 CodeBlobStub stub((CodeBlob*) addr);
1781 return codeBlob2objectArray(thread, env, &stub);
1782 WB_END
1783
1784 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1785 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1786 CHECK_JNI_EXCEPTION_(env, 0);
1787 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1788 return (jlong) mh->method_data();
1789 WB_END
1790
1791 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1792 return (jlong) thread->stack_size();
1793 WB_END
1794
1795 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1796 return (jlong) thread->stack_overflow_state()->stack_available(
1797 os::current_stack_pointer()) - (jlong)StackOverflow::stack_shadow_zone_size();
1798 WB_END
1799
1800
1801 int WhiteBox::array_bytes_to_length(size_t bytes) {
1802 return Array<u1>::bytes_to_length(bytes);
1803 }
1804
1805 ///////////////
1806 // MetaspaceTestContext and MetaspaceTestArena
1807 WB_ENTRY(jlong, WB_CreateMetaspaceTestContext(JNIEnv* env, jobject wb, jlong commit_limit, jlong reserve_limit))
1808 assert(is_aligned(commit_limit, BytesPerWord),
1809 "WB_CreateMetaspaceTestContext: commit_limit is not a multiple of the system word byte size");
1810 assert(is_aligned(reserve_limit, BytesPerWord),
1811 "WB_CreateMetaspaceTestContext: reserve_limit is not a multiple of the system word byte size");
1812 metaspace::MetaspaceTestContext* context =
1813 new metaspace::MetaspaceTestContext("whitebox-metaspace-context", (size_t) commit_limit / BytesPerWord,
1814 (size_t) reserve_limit / BytesPerWord);
1815 return (jlong)p2i(context);
1816 WB_END
1817
1818 WB_ENTRY(void, WB_DestroyMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1819 delete (metaspace::MetaspaceTestContext*) context;
1820 WB_END
1821
1822 WB_ENTRY(void, WB_PurgeMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1823 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1824 context0->purge_area();
1825 WB_END
1826
1827 WB_ENTRY(void, WB_PrintMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1828 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1829 context0->print_on(tty);
1830 WB_END
1831
1832 WB_ENTRY(jlong, WB_GetTotalCommittedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1833 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1834 return (jlong)context0->committed_words() * BytesPerWord;
1835 WB_END
1836
1837 WB_ENTRY(jlong, WB_GetTotalUsedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1838 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1839 return (jlong)context0->used_words() * BytesPerWord;
1840 WB_END
1841
1842 WB_ENTRY(jlong, WB_CreateArenaInTestContext(JNIEnv* env, jobject wb, jlong context, jboolean is_micro))
1843 const Metaspace::MetaspaceType type = is_micro ? Metaspace::ClassMirrorHolderMetaspaceType : Metaspace::StandardMetaspaceType;
1844 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1845 return (jlong)p2i(context0->create_arena(type));
1846 WB_END
1847
1848 WB_ENTRY(void, WB_DestroyMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena))
1849 delete (metaspace::MetaspaceTestArena*) arena;
1850 WB_END
1851
1852 WB_ENTRY(jlong, WB_AllocateFromMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong size))
1853 assert(is_aligned(size, BytesPerWord),
1854 "WB_AllocateFromMetaspaceTestArena: size is not a multiple of the system word byte size");
1855 metaspace::MetaspaceTestArena *arena0 = (metaspace::MetaspaceTestArena *)arena;
1856 MetaWord *p = arena0->allocate((size_t) size / BytesPerWord);
1857 return (jlong)p2i(p);
1858 WB_END
1859
1860 WB_ENTRY(void, WB_DeallocateToMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong p, jlong size))
1861 assert(is_aligned(size, BytesPerWord),
1862 "WB_DeallocateToMetaspaceTestArena: size is not a multiple of the system word byte size");
1863 metaspace::MetaspaceTestArena* arena0 = (metaspace::MetaspaceTestArena*) arena;
1864 arena0->deallocate((MetaWord*)p, (size_t) size / BytesPerWord);
1865 WB_END
1866
1867 WB_ENTRY(jlong, WB_GetMaxMetaspaceAllocationSize(JNIEnv* env, jobject wb))
1868 return (jlong) Metaspace::max_allocation_word_size() * BytesPerWord;
1869 WB_END
1870
1871 WB_ENTRY(jlong, WB_WordSize(JNIEnv* env))
1872 return (jlong)BytesPerWord;
1873 WB_END
1874
1875 WB_ENTRY(jlong, WB_RootChunkWordSize(JNIEnv* env))
1876 return (jlong)Metaspace::reserve_alignment_words();
1877 WB_END
1878
1879 WB_ENTRY(jboolean, WB_IsStaticallyLinked(JNIEnv* env, jobject wb))
1880 return JVM_IsStaticallyLinked();
1881 WB_END
1882
1883 //////////////
1884
1885 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1886 if (size < 0) {
1887 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1888 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1889 }
1890
1891 oop class_loader_oop = JNIHandles::resolve(class_loader);
1892 ClassLoaderData* cld = class_loader_oop != nullptr
1893 ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1894 : ClassLoaderData::the_null_class_loader_data();
1895
1896 void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1897
1898 return (jlong)(uintptr_t)metadata;
1899 WB_END
1900
1901 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1902 jstring version, jstring location, jobjectArray packages))
1903 Handle h_module (THREAD, JNIHandles::resolve(module));
1904 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1905 WB_END
1906
1907 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1908 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1909 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1910 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1911 WB_END
1912
1913 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1914 Handle h_module (THREAD, JNIHandles::resolve(module));
1915 Modules::add_module_exports_to_all_unnamed(h_module, package, CHECK);
1916 WB_END
1917
1918 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1919 Handle h_module (THREAD, JNIHandles::resolve(module));
1920 Modules::add_module_exports(h_module, package, Handle(), CHECK);
1921 WB_END
1922
1923 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1924 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1925 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1926 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1927 WB_END
1928
1929 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1930 if (inc < 0) {
1931 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1932 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1933 }
1934
1935 jlong max_size_t = (jlong) ((size_t) -1);
1936 if (inc > max_size_t) {
1937 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1938 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1939 }
1940
1941 size_t new_cap_until_GC = 0;
1942 size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1943 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1944 if (!success) {
1945 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1946 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1947 "due to contention with another thread");
1948 }
1949 return (jlong) new_cap_until_GC;
1950 WB_END
1951
1952 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1953 return (jlong) MetaspaceGC::capacity_until_GC();
1954 WB_END
1955
1956 // The function is only valid when CDS is available.
1957 WB_ENTRY(jlong, WB_AOTMetaspaceRegionAlignment(JNIEnv* env, jobject wb))
1958 #if INCLUDE_CDS
1959 return (jlong)AOTMetaspace::core_region_alignment();
1960 #else
1961 ShouldNotReachHere();
1962 return 0L;
1963 #endif
1964 WB_END
1965
1966 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1967 oop obj_oop = JNIHandles::resolve(obj);
1968 return (jboolean) obj_oop->mark().has_monitor();
1969 WB_END
1970
1971 WB_ENTRY(jboolean, WB_IsAsanEnabled(JNIEnv* env))
1972 return (jboolean) WhiteBox::is_asan_enabled();
1973 WB_END
1974
1975 WB_ENTRY(jboolean, WB_IsUbsanEnabled(JNIEnv* env))
1976 return (jboolean) WhiteBox::is_ubsan_enabled();
1977 WB_END
1978
1979 WB_ENTRY(jlong, WB_getInUseMonitorCount(JNIEnv* env, jobject wb))
1980 return (jlong) WhiteBox::get_in_use_monitor_count();
1981 WB_END
1982
1983 WB_ENTRY(jint, WB_getLockStackCapacity(JNIEnv* env))
1984 return (jint) LockStack::CAPACITY;
1985 WB_END
1986
1987 WB_ENTRY(jboolean, WB_supportsRecursiveFastLocking(JNIEnv* env))
1988 return (jboolean) VM_Version::supports_recursive_fast_locking();
1989 WB_END
1990
1991 WB_ENTRY(jboolean, WB_DeflateIdleMonitors(JNIEnv* env, jobject wb))
1992 log_info(monitorinflation)("WhiteBox initiated DeflateIdleMonitors");
1993 return ObjectSynchronizer::request_deflate_idle_monitors_from_wb();
1994 WB_END
1995
1996 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1997 VM_ForceSafepoint force_safepoint_op;
1998 VMThread::execute(&force_safepoint_op);
1999 WB_END
2000
2001 WB_ENTRY(void, WB_ForceClassLoaderStatsSafepoint(JNIEnv* env, jobject wb))
2002 nullStream dev_null;
2003 ClassLoaderStatsVMOperation force_op(&dev_null);
2004 VMThread::execute(&force_op);
2005 WB_END
2006
2007 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
2008 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2009 return (jlong) ik->constants();
2010 WB_END
2011
2012 WB_ENTRY(jobjectArray, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass klass))
2013 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2014 objArrayOop resolved_refs= ik->constants()->resolved_references();
2015 return (jobjectArray)JNIHandles::make_local(THREAD, resolved_refs);
2016 WB_END
2017
2018 WB_ENTRY(jint, WB_getFieldEntriesLength(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_field_entries_length();
2025 WB_END
2026
2027 WB_ENTRY(jint, WB_getFieldCPIndex(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_field_entry_at(index)->constant_pool_index();
2034 WB_END
2035
2036 WB_ENTRY(jint, WB_getMethodEntriesLength(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_method_entries_length();
2043 WB_END
2044
2045 WB_ENTRY(jint, WB_getMethodCPIndex(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_method_entry_at(index)->constant_pool_index();
2052 WB_END
2053
2054 WB_ENTRY(jint, WB_getIndyInfoLength(JNIEnv* env, jobject wb, jclass klass))
2055 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2056 ConstantPool* cp = ik->constants();
2057 if (cp->cache() == nullptr) {
2058 return -1;
2059 }
2060 return cp->resolved_indy_entries_length();
2061 WB_END
2062
2063 WB_ENTRY(jint, WB_getIndyCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2064 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2065 ConstantPool* cp = ik->constants();
2066 if (cp->cache() == nullptr) {
2067 return -1;
2068 }
2069 return cp->resolved_indy_entry_at(index)->constant_pool_index();
2070 WB_END
2071
2072 WB_ENTRY(jobject, WB_printClasses(JNIEnv* env, jobject wb, jstring class_name_pattern, jint flags))
2073 ThreadToNativeFromVM ttnfv(thread);
2074 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2075 ResourceMark rm;
2076 stringStream st;
2077 {
2078 ThreadInVMfromNative ttvfn(thread); // back to VM
2079 ClassPrinter::print_classes(c, flags, &st);
2080 }
2081 jstring result = env->NewStringUTF(st.freeze());
2082 CHECK_JNI_EXCEPTION_(env, nullptr);
2083 return result;
2084 WB_END
2085
2086 WB_ENTRY(jobject, WB_printMethods(JNIEnv* env, jobject wb, jstring class_name_pattern, jstring method_pattern, jint flags))
2087 ThreadToNativeFromVM ttnfv(thread);
2088 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2089 const char* m = env->GetStringUTFChars(method_pattern, nullptr);
2090 ResourceMark rm;
2091 stringStream st;
2092 {
2093 ThreadInVMfromNative ttvfn(thread); // back to VM
2094 ClassPrinter::print_methods(c, m, flags, &st);
2095 }
2096 jstring result = env->NewStringUTF(st.freeze());
2097 CHECK_JNI_EXCEPTION_(env, nullptr);
2098 return result;
2099 WB_END
2100
2101 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
2102 VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
2103 VMThread::execute(&clear_ics);
2104 WB_END
2105
2106 template <typename T>
2107 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
2108 assert(value != nullptr, "sanity");
2109 if (method == nullptr || name == nullptr) {
2110 return false;
2111 }
2112 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
2113 CHECK_JNI_EXCEPTION_(env, false);
2114 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
2115 // can't be in VM when we call JNI
2116 ThreadToNativeFromVM ttnfv(thread);
2117 const char* flag_name = env->GetStringUTFChars(name, nullptr);
2118 CHECK_JNI_EXCEPTION_(env, false);
2119 CompileCommandEnum option = CompilerOracle::string_to_option(flag_name);
2120 env->ReleaseStringUTFChars(name, flag_name);
2121 if (option == CompileCommandEnum::Unknown) {
2122 return false;
2123 }
2124 if (!CompilerOracle::option_matches_type(option, *value)) {
2125 return false;
2126 }
2127 return CompilerOracle::has_option_value(mh, option, *value);
2128 }
2129
2130 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2131 bool result;
2132 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
2133 // can't be in VM when we call JNI
2134 ThreadToNativeFromVM ttnfv(thread);
2135 return booleanBox(thread, env, result);
2136 }
2137 return nullptr;
2138 WB_END
2139
2140 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2141 intx result;
2142 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
2143 // can't be in VM when we call JNI
2144 ThreadToNativeFromVM ttnfv(thread);
2145 return longBox(thread, env, result);
2146 }
2147 return nullptr;
2148 WB_END
2149
2150 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2151 uintx result;
2152 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
2153 // can't be in VM when we call JNI
2154 ThreadToNativeFromVM ttnfv(thread);
2155 return longBox(thread, env, result);
2156 }
2157 return nullptr;
2158 WB_END
2159
2160 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2161 double result;
2162 if (GetMethodOption <double> (thread, env, method, name, &result)) {
2163 // can't be in VM when we call JNI
2164 ThreadToNativeFromVM ttnfv(thread);
2165 return doubleBox(thread, env, result);
2166 }
2167 return nullptr;
2168 WB_END
2169
2170 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2171 ccstr ccstrResult;
2172 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
2173 // can't be in VM when we call JNI
2174 ThreadToNativeFromVM ttnfv(thread);
2175 jstring result = env->NewStringUTF(ccstrResult);
2176 CHECK_JNI_EXCEPTION_(env, nullptr);
2177 return result;
2178 }
2179 return nullptr;
2180 WB_END
2181
2182 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
2183 const char* p = CDSConfig::default_archive_path();
2184 ThreadToNativeFromVM ttn(thread);
2185 jstring path_string = env->NewStringUTF(p);
2186
2187 CHECK_JNI_EXCEPTION_(env, nullptr);
2188
2189 return path_string;
2190 WB_END
2191
2192 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
2193 return CDSConfig::is_using_archive();
2194 WB_END
2195
2196 WB_ENTRY(jint, WB_GetCDSGenericHeaderMinVersion(JNIEnv* env, jobject wb))
2197 #if INCLUDE_CDS
2198 return (jint)CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION;
2199 #else
2200 ShouldNotReachHere();
2201 return (jint)-1;
2202 #endif
2203 WB_END
2204
2205 WB_ENTRY(jint, WB_GetCDSCurrentVersion(JNIEnv* env, jobject wb))
2206 #if INCLUDE_CDS
2207 return (jint)CURRENT_CDS_ARCHIVE_VERSION;
2208 #else
2209 ShouldNotReachHere();
2210 return (jint)-1;
2211 #endif
2212 WB_END
2213
2214 WB_ENTRY(jboolean, WB_CDSMemoryMappingFailed(JNIEnv* env, jobject wb))
2215 return FileMapInfo::memory_mapping_failed();
2216 WB_END
2217
2218 WB_ENTRY(jboolean, WB_IsSharedInternedString(JNIEnv* env, jobject wb, jobject str))
2219 if (!HeapShared::is_loading_mapping_mode()) {
2220 return false;
2221 }
2222 ResourceMark rm(THREAD);
2223 oop str_oop = JNIHandles::resolve(str);
2224 int length;
2225 jchar* chars = java_lang_String::as_unicode_string(str_oop, length, CHECK_(false));
2226 return StringTable::lookup_shared(chars, length) == str_oop;
2227 WB_END
2228
2229 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
2230 return (jboolean)AOTMetaspace::in_aot_cache(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2231 WB_END
2232
2233 WB_ENTRY(jboolean, WB_AreSharedStringsMapped(JNIEnv* env))
2234 return AOTMappedHeapLoader::is_mapped();
2235 WB_END
2236
2237 WB_ENTRY(void, WB_LinkClass(JNIEnv* env, jobject wb, jclass clazz))
2238 Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2239 if (!k->is_instance_klass()) {
2240 return;
2241 }
2242 InstanceKlass *ik = InstanceKlass::cast(k);
2243 ik->link_class(THREAD); // may throw verification error
2244 WB_END
2245
2246 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
2247 return AOTMappedHeapLoader::is_mapped();
2248 WB_END
2249
2250 WB_ENTRY(jboolean, WB_IsCDSIncluded(JNIEnv* env))
2251 #if INCLUDE_CDS
2252 // An exploded build inhibits use of CDS. Therefore, for the
2253 // purpose of testing, the JVM can be treated as not having CDS
2254 // built in at all.
2255 return ClassLoader::has_jrt_entry();
2256 #else
2257 return false;
2258 #endif // INCLUDE_CDS
2259 WB_END
2260
2261 WB_ENTRY(jboolean, WB_isC2OrJVMCIIncluded(JNIEnv* env))
2262 #if COMPILER2_OR_JVMCI
2263 return true;
2264 #else
2265 return false;
2266 #endif
2267 WB_END
2268
2269 WB_ENTRY(jboolean, WB_IsJVMCISupportedByGC(JNIEnv* env))
2270 #if INCLUDE_JVMCI
2271 return JVMCIGlobals::gc_supports_jvmci();
2272 #else
2273 return false;
2274 #endif
2275 WB_END
2276
2277 static bool canWriteJavaHeapArchive() {
2278 return !CDSConfig::are_vm_options_incompatible_with_dumping_heap();
2279 }
2280
2281 WB_ENTRY(jboolean, WB_CanWriteJavaHeapArchive(JNIEnv* env))
2282 return canWriteJavaHeapArchive();
2283 WB_END
2284
2285 WB_ENTRY(jboolean, WB_CanWriteMappedJavaHeapArchive(JNIEnv* env))
2286 return canWriteJavaHeapArchive() && !AOTStreamableObjects;
2287 WB_END
2288
2289 WB_ENTRY(jboolean, WB_CanWriteStreamedJavaHeapArchive(JNIEnv* env))
2290 return canWriteJavaHeapArchive() && AOTStreamableObjects;
2291 WB_END
2292
2293 WB_ENTRY(jboolean, WB_IsJFRIncluded(JNIEnv* env))
2294 #if INCLUDE_JFR
2295 return true;
2296 #else
2297 return false;
2298 #endif // INCLUDE_JFR
2299 WB_END
2300
2301 WB_ENTRY(jboolean, WB_IsDTraceIncluded(JNIEnv* env))
2302 #if defined(DTRACE_ENABLED)
2303 return true;
2304 #else
2305 return false;
2306 #endif // DTRACE_ENABLED
2307 WB_END
2308
2309 #if INCLUDE_CDS
2310
2311 WB_ENTRY(jint, WB_GetCDSOffsetForName(JNIEnv* env, jobject o, jstring name))
2312 ResourceMark rm;
2313 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2314 jint result = (jint)CDSConstants::get_cds_offset(c_name);
2315 return result;
2316 WB_END
2317
2318 WB_ENTRY(jint, WB_GetCDSConstantForName(JNIEnv* env, jobject o, jstring name))
2319 ResourceMark rm;
2320 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2321 jint result = (jint)CDSConstants::get_cds_constant(c_name);
2322 return result;
2323 WB_END
2324
2325 #endif // INCLUDE_CDS
2326
2327 WB_ENTRY(jboolean, WB_HandshakeReadMonitors(JNIEnv* env, jobject wb, jobject thread_handle))
2328 class ReadMonitorsHandshakeClosure : public HandshakeClosure {
2329 jboolean _executed;
2330
2331 void do_thread(Thread* th) {
2332 JavaThread* jt = JavaThread::cast(th);
2333 ResourceMark rm;
2334
2335 GrowableArray<MonitorInfo*>* info = new GrowableArray<MonitorInfo*>();
2336
2337 if (!jt->has_last_Java_frame()) {
2338 return;
2339 }
2340 RegisterMap rmap(jt,
2341 RegisterMap::UpdateMap::include,
2342 RegisterMap::ProcessFrames::include,
2343 RegisterMap::WalkContinuation::skip);
2344 for (javaVFrame* vf = jt->last_java_vframe(&rmap); vf != nullptr; vf = vf->java_sender()) {
2345 GrowableArray<MonitorInfo*> *monitors = vf->monitors();
2346 if (monitors != nullptr) {
2347 int len = monitors->length();
2348 // Walk monitors youngest to oldest
2349 for (int i = len - 1; i >= 0; i--) {
2350 MonitorInfo* mon_info = monitors->at(i);
2351 if (mon_info->eliminated()) continue;
2352 oop owner = mon_info->owner();
2353 if (owner != nullptr) {
2354 info->append(mon_info);
2355 }
2356 }
2357 }
2358 }
2359 _executed = true;
2360 }
2361
2362 public:
2363 ReadMonitorsHandshakeClosure() : HandshakeClosure("WB_HandshakeReadMonitors"), _executed(false) {}
2364 jboolean executed() const { return _executed; }
2365 };
2366
2367 ReadMonitorsHandshakeClosure rmhc;
2368 if (thread_handle != nullptr) {
2369 ThreadsListHandle tlh;
2370 JavaThread* target = nullptr;
2371 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2372 if (is_alive) {
2373 Handshake::execute(&rmhc, &tlh, target);
2374 }
2375 }
2376 return rmhc.executed();
2377 WB_END
2378
2379 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
2380 class TraceSelfHandshakeClosure : public HandshakeClosure {
2381 jint _num_threads_completed;
2382
2383 void do_thread(Thread* th) {
2384 JavaThread* jt = JavaThread::cast(th);
2385 ResourceMark rm;
2386
2387 jt->print_on(tty);
2388 jt->print_stack_on(tty);
2389 tty->cr();
2390 AtomicAccess::inc(&_num_threads_completed);
2391 }
2392
2393 public:
2394 TraceSelfHandshakeClosure(Thread* thread) : HandshakeClosure("WB_TraceSelf"), _num_threads_completed(0) {}
2395
2396 jint num_threads_completed() const { return _num_threads_completed; }
2397 };
2398 TraceSelfHandshakeClosure tshc(Thread::current());
2399
2400 if (all_threads) {
2401 Handshake::execute(&tshc);
2402 } else if (thread_handle != nullptr) {
2403 ThreadsListHandle tlh;
2404 JavaThread* target = nullptr;
2405 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2406 if (is_alive) {
2407 Handshake::execute(&tshc, &tlh, target);
2408 }
2409 }
2410 return tshc.num_threads_completed();
2411 WB_END
2412
2413 WB_ENTRY(void, WB_AsyncHandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle))
2414 class TraceSelfHandshakeClosure : public AsyncHandshakeClosure {
2415 JavaThread* _self;
2416 void do_thread(Thread* th) {
2417 assert(th->is_Java_thread(), "sanity");
2418 // AsynchHandshake handshakes are only executed by target.
2419 assert(_self == th, "Must be");
2420 assert(Thread::current() == th, "Must be");
2421 JavaThread* jt = JavaThread::cast(th);
2422 ResourceMark rm;
2423 jt->print_on(tty);
2424 jt->print_stack_on(tty);
2425 tty->cr();
2426 }
2427
2428 public:
2429 TraceSelfHandshakeClosure(JavaThread* self_target) : AsyncHandshakeClosure("WB_TraceSelf"), _self(self_target) {}
2430 };
2431 if (thread_handle != nullptr) {
2432 ThreadsListHandle tlh;
2433 JavaThread* target = nullptr;
2434 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2435 if (is_alive) {
2436 TraceSelfHandshakeClosure* tshc = new TraceSelfHandshakeClosure(target);
2437 Handshake::execute(tshc, target);
2438 }
2439 }
2440 WB_END
2441
2442 static volatile int _emulated_lock = 0;
2443
2444 WB_ENTRY(void, WB_LockAndBlock(JNIEnv* env, jobject wb, jboolean suspender))
2445 JavaThread* self = JavaThread::current();
2446
2447 {
2448 // Before trying to acquire the lock transition into a safepoint safe state.
2449 // Otherwise if either suspender or suspendee blocks for a safepoint
2450 // in ~ThreadBlockInVM the other one could loop forever trying to acquire
2451 // the lock without allowing the safepoint to progress.
2452 ThreadBlockInVM tbivm(self);
2453
2454 // We will deadlock here if we are 'suspender' and 'suspendee'
2455 // suspended in ~ThreadBlockInVM. This verifies we only suspend
2456 // at the right place.
2457 while (AtomicAccess::cmpxchg(&_emulated_lock, 0, 1) != 0) {}
2458 assert(_emulated_lock == 1, "Must be locked");
2459
2460 // Sleep much longer in suspendee to force situation where
2461 // 'suspender' is waiting above to acquire lock.
2462 os::naked_short_sleep(suspender ? 1 : 10);
2463 }
2464 AtomicAccess::store(&_emulated_lock, 0);
2465 WB_END
2466
2467 // Some convenience methods to deal with objects from java
2468 int WhiteBox::offset_for_field(const char* field_name, oop object,
2469 Symbol* signature_symbol) {
2470 assert(field_name != nullptr && strlen(field_name) > 0, "Field name not valid");
2471
2472 //Only non-array oops have fields. Don't call this function on arrays!
2473 InstanceKlass* ik = InstanceKlass::cast(object->klass());
2474
2475 //Create symbols to look for in the class
2476 TempNewSymbol name_symbol = SymbolTable::new_symbol(field_name);
2477
2478 //To be filled in with an offset of the field we're looking for
2479 fieldDescriptor fd;
2480
2481 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2482 if (res == nullptr) {
2483 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2484 name_symbol->as_C_string());
2485 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2486 }
2487
2488 //fetch the field at the offset we've found
2489 int dest_offset = fd.offset();
2490
2491 return dest_offset;
2492 }
2493
2494
2495 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2496 int offset = offset_for_field(field_name, object,
2497 vmSymbols::string_signature());
2498 oop string = object->obj_field(offset);
2499 if (string == nullptr) {
2500 return nullptr;
2501 }
2502 const char* ret = java_lang_String::as_utf8_string(string);
2503 return ret;
2504 }
2505
2506 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2507 int offset =
2508 offset_for_field(field_name, object, vmSymbols::bool_signature());
2509 bool ret = (object->bool_field(offset) == JNI_TRUE);
2510 return ret;
2511 }
2512
2513 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2514 ResourceMark rm;
2515 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(wbclass));
2516 const char* klass_name = klass->external_name();
2517
2518 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2519
2520 // one by one registration natives for exception catching
2521 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2522 CHECK_JNI_EXCEPTION(env);
2523 for (int i = 0, n = method_count; i < n; ++i) {
2524 // Skip dummy entries
2525 if (method_array[i].fnPtr == nullptr) continue;
2526 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2527 jthrowable throwable_obj = env->ExceptionOccurred();
2528 if (throwable_obj != nullptr) {
2529 env->ExceptionClear();
2530 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2531 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2532 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2533 tty->print_cr("Warning: 'NoSuchMethodError' on register of %s::%s%s",
2534 klass_name, method_array[i].name, method_array[i].signature);
2535 }
2536 } else {
2537 // Registration failed unexpectedly.
2538 tty->print_cr("Warning: unexpected error on register of %s::%s%s. All methods will be unregistered",
2539 klass_name, method_array[i].name, method_array[i].signature);
2540 env->UnregisterNatives(wbclass);
2541 break;
2542 }
2543 }
2544 }
2545 }
2546
2547 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2548 // can't be in VM when we call JNI
2549 ThreadToNativeFromVM ttnfv(thread);
2550 const char* dir = env->GetStringUTFChars(compDirect, nullptr);
2551 CHECK_JNI_EXCEPTION_(env, 0);
2552 int ret;
2553 {
2554 ThreadInVMfromNative ttvfn(thread); // back to VM
2555 ret = DirectivesParser::parse_string(dir, tty);
2556 }
2557 env->ReleaseStringUTFChars(compDirect, dir);
2558 // -1 for error parsing directive. Return 0 as number of directives added.
2559 if (ret == -1) {
2560 ret = 0;
2561 }
2562 return (jint) ret;
2563 WB_END
2564
2565 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2566 DirectivesStack::pop(count);
2567 WB_END
2568
2569 // Checks that the library libfile has the noexecstack bit set.
2570 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2571 jboolean ret = false;
2572 #ifdef LINUX
2573 // Can't be in VM when we call JNI.
2574 ThreadToNativeFromVM ttnfv(thread);
2575 const char* lf = env->GetStringUTFChars(libfile, nullptr);
2576 CHECK_JNI_EXCEPTION_(env, 0);
2577 ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2578 env->ReleaseStringUTFChars(libfile, lf);
2579 #endif
2580 return ret;
2581 WB_END
2582
2583 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2584 return os::is_containerized();
2585 WB_END
2586
2587 // Physical memory of the host machine (including containers)
2588 WB_ENTRY(jlong, WB_HostPhysicalMemory(JNIEnv* env, jobject o))
2589 return static_cast<jlong>(os::Machine::physical_memory());
2590 WB_END
2591
2592 // Available memory of the host machine (container-aware)
2593 WB_ENTRY(jlong, WB_HostAvailableMemory(JNIEnv* env, jobject o))
2594 physical_memory_size_type avail_mem = 0;
2595 // Return value ignored - defaulting to 0 on failure.
2596 (void)os::available_memory(avail_mem);
2597 return static_cast<jlong>(avail_mem);
2598 WB_END
2599
2600 // Physical swap of the host machine (including containers), Linux only.
2601 WB_ENTRY(jlong, WB_HostPhysicalSwap(JNIEnv* env, jobject o))
2602 #ifdef LINUX
2603 physical_memory_size_type swap_val = 0;
2604 if (!os::Linux::host_swap(swap_val)) {
2605 return -1; // treat as unlimited
2606 }
2607 return static_cast<jlong>(swap_val);
2608 #endif
2609 return -1; // Not used/implemented on other platforms
2610 WB_END
2611
2612 WB_ENTRY(jint, WB_ValidateCgroup(JNIEnv* env,
2613 jobject o,
2614 jboolean cgroups_v2_enabled,
2615 jstring controllers_file,
2616 jstring proc_self_cgroup,
2617 jstring proc_self_mountinfo))
2618 jint ret = 0;
2619 #ifdef LINUX
2620 ThreadToNativeFromVM ttnfv(thread);
2621 const char* c_file = env->GetStringUTFChars(controllers_file, nullptr);
2622 CHECK_JNI_EXCEPTION_(env, 0);
2623 const char* p_s_cgroup = env->GetStringUTFChars(proc_self_cgroup, nullptr);
2624 CHECK_JNI_EXCEPTION_(env, 0);
2625 const char* p_s_mountinfo = env->GetStringUTFChars(proc_self_mountinfo, nullptr);
2626 CHECK_JNI_EXCEPTION_(env, 0);
2627 u1 cg_type_flags = 0;
2628 // This sets cg_type_flags
2629 WhiteBox::validate_cgroup(cgroups_v2_enabled, c_file, p_s_cgroup, p_s_mountinfo, &cg_type_flags);
2630 ret = (jint)cg_type_flags;
2631 env->ReleaseStringUTFChars(controllers_file, c_file);
2632 env->ReleaseStringUTFChars(proc_self_cgroup, p_s_cgroup);
2633 env->ReleaseStringUTFChars(proc_self_mountinfo, p_s_mountinfo);
2634 #endif
2635 return ret;
2636 WB_END
2637
2638 // Available cpus of the host machine, Linux only.
2639 // Used in container testing.
2640 WB_ENTRY(jint, WB_HostCPUs(JNIEnv* env, jobject o))
2641 LINUX_ONLY(return os::Linux::active_processor_count();)
2642 return -1; // Not used/implemented on other platforms
2643 WB_END
2644
2645 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2646 os::print_os_info(tty);
2647 WB_END
2648
2649 // Elf decoder
2650 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2651 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2652 ElfFile::_do_not_cache_elf_section = true;
2653 #endif
2654 WB_END
2655
2656 WB_ENTRY(jlong, WB_ResolvedMethodItemsCount(JNIEnv* env, jobject o))
2657 return (jlong) ResolvedMethodTable::items_count();
2658 WB_END
2659
2660 WB_ENTRY(jint, WB_GetKlassMetadataSize(JNIEnv* env, jobject wb, jclass mirror))
2661 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(mirror));
2662 // Return size in bytes.
2663 return k->size() * wordSize;
2664 WB_END
2665
2666 // See test/hotspot/jtreg/runtime/Thread/ThreadObjAccessAtExit.java.
2667 // It explains how the thread's priority field is used for test state coordination.
2668 //
2669 WB_ENTRY(void, WB_CheckThreadObjOfTerminatingThread(JNIEnv* env, jobject wb, jobject target_handle))
2670 oop target_oop = JNIHandles::resolve_non_null(target_handle);
2671 jlong tid = java_lang_Thread::thread_id(target_oop);
2672 JavaThread* target = java_lang_Thread::thread(target_oop);
2673
2674 // Grab a ThreadsListHandle to protect the target thread whilst terminating
2675 ThreadsListHandle tlh;
2676
2677 // Look up the target thread by tid to ensure it is present
2678 JavaThread* t = tlh.list()->find_JavaThread_from_java_tid(tid);
2679 if (t == nullptr) {
2680 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread not found in ThreadsList!");
2681 }
2682
2683 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is protected");
2684 // Allow target to terminate by boosting priority
2685 java_lang_Thread::set_priority(t->threadObj(), ThreadPriority(NormPriority + 1));
2686
2687 // Now wait for the target to terminate
2688 while (!target->is_terminated()) {
2689 ThreadBlockInVM tbivm(thread); // just in case target is involved in a safepoint
2690 os::naked_short_sleep(0);
2691 }
2692
2693 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is terminated");
2694
2695 // Now release the GC inducing thread - we have to re-resolve the external oop that
2696 // was passed in as GC may have occurred and we don't know if we can trust t->threadObj() now.
2697 oop original = JNIHandles::resolve_non_null(target_handle);
2698 java_lang_Thread::set_priority(original, ThreadPriority(NormPriority + 2));
2699
2700 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: GC has been initiated - checking threadObj:");
2701
2702 // The Java code should be creating garbage and triggering GC, which would potentially move
2703 // the threadObj oop. If the exiting thread is properly protected then its threadObj should
2704 // remain valid and equal to our initial target_handle. Loop a few times to give GC a chance to
2705 // kick in.
2706 for (int i = 0; i < 5; i++) {
2707 oop original = JNIHandles::resolve_non_null(target_handle);
2708 oop current = t->threadObj();
2709 if (original != current) {
2710 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: failed comparison on iteration %d", i);
2711 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread oop has changed!");
2712 } else {
2713 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: successful comparison on iteration %d", i);
2714 ThreadBlockInVM tbivm(thread);
2715 os::naked_short_sleep(50);
2716 }
2717 }
2718 WB_END
2719
2720 WB_ENTRY(void, WB_VerifyFrames(JNIEnv* env, jobject wb, jboolean log, jboolean update_map))
2721 ResourceMark rm; // for verify
2722 stringStream st;
2723 for (StackFrameStream fst(JavaThread::current(), update_map, true); !fst.is_done(); fst.next()) {
2724 frame* current_frame = fst.current();
2725 if (log) {
2726 current_frame->print_value_on(&st);
2727 }
2728 current_frame->verify(fst.register_map());
2729 }
2730 if (log) {
2731 tty->print_cr("[WhiteBox::VerifyFrames] Walking Frames");
2732 tty->print_raw(st.freeze());
2733 tty->print_cr("[WhiteBox::VerifyFrames] Done");
2734 }
2735 WB_END
2736
2737 WB_ENTRY(jboolean, WB_IsJVMTIIncluded(JNIEnv* env, jobject wb))
2738 #if INCLUDE_JVMTI
2739 return JNI_TRUE;
2740 #else
2741 return JNI_FALSE;
2742 #endif
2743 WB_END
2744
2745 WB_ENTRY(void, WB_WaitUnsafe(JNIEnv* env, jobject wb, jint time))
2746 os::naked_short_sleep(time);
2747 WB_END
2748
2749 WB_ENTRY(void, WB_BusyWaitCPUTime(JNIEnv* env, jobject wb, jint time))
2750 ThreadToNativeFromVM ttn(thread);
2751 u8 start = os::current_thread_cpu_time();
2752 u8 target_duration = time * (u8)1000000;
2753 while (os::current_thread_cpu_time() - start < target_duration) {
2754 for (volatile int i = 0; i < 1000000; i++);
2755 }
2756 WB_END
2757
2758 WB_ENTRY(jboolean, WB_CPUSamplerSetOutOfStackWalking(JNIEnv* env, jobject wb, jboolean enable))
2759 #if defined(ASSERT) && INCLUDE_JFR && defined(LINUX)
2760 return JfrCPUTimeThreadSampling::set_out_of_stack_walking_enabled(enable == JNI_TRUE) ? JNI_TRUE : JNI_FALSE;
2761 #else
2762 return JNI_FALSE;
2763 #endif
2764 WB_END
2765
2766 WB_ENTRY(jstring, WB_GetLibcName(JNIEnv* env, jobject o))
2767 ThreadToNativeFromVM ttn(thread);
2768 jstring info_string = env->NewStringUTF(XSTR(LIBC));
2769 CHECK_JNI_EXCEPTION_(env, nullptr);
2770 return info_string;
2771 WB_END
2772
2773 WB_ENTRY(void, WB_PinObject(JNIEnv* env, jobject wb, jobject o))
2774 #if INCLUDE_G1GC
2775 if (!UseG1GC) {
2776 ShouldNotReachHere();
2777 return;
2778 }
2779 oop obj = JNIHandles::resolve(o);
2780 G1CollectedHeap::heap()->pin_object(thread, obj);
2781 #else
2782 ShouldNotReachHere();
2783 #endif // INCLUDE_G1GC
2784 WB_END
2785
2786 WB_ENTRY(void, WB_UnpinObject(JNIEnv* env, jobject wb, jobject o))
2787 #if INCLUDE_G1GC
2788 if (!UseG1GC) {
2789 ShouldNotReachHere();
2790 return;
2791 }
2792 oop obj = JNIHandles::resolve(o);
2793 G1CollectedHeap::heap()->unpin_object(thread, obj);
2794 #else
2795 ShouldNotReachHere();
2796 #endif // INCLUDE_G1GC
2797 WB_END
2798
2799 WB_ENTRY(jboolean, WB_SetVirtualThreadsNotifyJvmtiMode(JNIEnv* env, jobject wb, jboolean enable))
2800 if (!Continuations::enabled()) {
2801 tty->print_cr("WB error: must be Continuations::enabled()!");
2802 return JNI_FALSE;
2803 }
2804 jboolean result = false;
2805 #if INCLUDE_JVMTI
2806 if (enable) {
2807 result = JvmtiEnvBase::enable_virtual_threads_notify_jvmti();
2808 } else {
2809 result = JvmtiEnvBase::disable_virtual_threads_notify_jvmti();
2810 }
2811 #endif
2812 return result;
2813 WB_END
2814
2815 WB_ENTRY(void, WB_PreTouchMemory(JNIEnv* env, jobject wb, jlong addr, jlong size))
2816 void* const from = (void*)addr;
2817 void* const to = (void*)(addr + size);
2818 if (from > to) {
2819 os::pretouch_memory(from, to, os::vm_page_size());
2820 }
2821 WB_END
2822
2823 WB_ENTRY(void, WB_CleanMetaspaces(JNIEnv* env, jobject target))
2824 ClassLoaderDataGraph::safepoint_and_clean_metaspaces();
2825 WB_END
2826
2827 // Reports resident set size (RSS) in bytes
2828 WB_ENTRY(jlong, WB_Rss(JNIEnv* env, jobject o))
2829 return os::rss();
2830 WB_END
2831
2832 WB_ENTRY(void, WB_ControlledCrash(JNIEnv* env, jobject o, jint how))
2833 #ifdef ASSERT
2834 VMError::controlled_crash(how);
2835 #else
2836 THROW_MSG(vmSymbols::java_lang_UnsupportedOperationException(), "Only available in debug builds");
2837 #endif
2838 WB_END
2839
2840 #define CC (char*)
2841
2842 static JNINativeMethod methods[] = {
2843 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
2844 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
2845 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
2846 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
2847 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
2848 {CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
2849 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
2850 {CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
2851 {CC"getHeapAlignment", CC"()J", (void*)&WB_GetHeapAlignment},
2852 {CC"shipsFullDebugInfo", CC"()Z", (void*)&WB_ShipDebugInfoFull},
2853 {CC"shipsPublicDebugInfo", CC"()Z", (void*)&WB_ShipDebugInfoPublic},
2854 {CC"countAliveClasses0", CC"(Ljava/lang/String;)I", (void*)&WB_CountAliveClasses },
2855 {CC"getSymbolRefcount", CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2856 {CC"parseCommandLine0",
2857 CC"(Ljava/lang/String;C[Ljdk/test/whitebox/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2858 (void*) &WB_ParseCommandLine
2859 },
2860 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2861 (void*)&WB_AddToBootstrapClassLoaderSearch},
2862 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2863 (void*)&WB_AddToSystemClassLoaderSearch},
2864 {CC"getCompressedOopsMaxHeapSize", CC"()J",
2865 (void*)&WB_GetCompressedOopsMaxHeapSize},
2866 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
2867 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
2868 {CC"decodeNKlassAndAccessKlass",CC"(I)V", (void*)&WB_DecodeNKlassAndAccessKlass},
2869 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
2870 #if INCLUDE_CDS
2871 {CC"getCDSOffsetForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSOffsetForName},
2872 {CC"getCDSConstantForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSConstantForName},
2873 #endif
2874 #if INCLUDE_G1GC
2875 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
2876 {CC"g1CompletedConcurrentMarkCycles", CC"()I", (void*)&WB_G1CompletedConcurrentMarkCycles},
2877 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
2878 {CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
2879 {CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
2880 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
2881 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
2882 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
2883 {CC"g1HasRegionsToUncommit", CC"()Z", (void*)&WB_G1HasRegionsToUncommit},
2884 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2885 (void*)&WB_G1AuxiliaryMemoryUsage },
2886 {CC"g1ActiveMemoryNodeCount", CC"()I", (void*)&WB_G1ActiveMemoryNodeCount },
2887 {CC"g1MemoryNodeIds", CC"()[I", (void*)&WB_G1MemoryNodeIds },
2888 {CC"g1GetMixedGCInfo", CC"(I)[J", (void*)&WB_G1GetMixedGCInfo },
2889 #endif // INCLUDE_G1GC
2890 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
2891 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
2892 {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J", (void*)&WB_NMTMallocWithPseudoStackAndType},
2893 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
2894 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
2895 {CC"NMTAttemptReserveMemoryAt", CC"(JJ)J", (void*)&WB_NMTAttemptReserveMemoryAt },
2896 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
2897 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
2898 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
2899 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
2900 {CC"NMTNewArena", CC"(J)J", (void*)&WB_NMTNewArena },
2901 {CC"NMTFreeArena", CC"(J)V", (void*)&WB_NMTFreeArena },
2902 {CC"NMTArenaMalloc", CC"(JJ)V", (void*)&WB_NMTArenaMalloc },
2903 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
2904 {CC"isFrameDeoptimized", CC"(I)Z", (void*)&WB_IsFrameDeoptimized},
2905 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
2906 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
2907 (void*)&WB_DeoptimizeMethod },
2908 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
2909 (void*)&WB_IsMethodCompiled },
2910 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
2911 (void*)&WB_IsMethodCompilable},
2912 {CC"isMethodQueuedForCompilation0",
2913 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
2914 {CC"isIntrinsicAvailable0",
2915 CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
2916 (void*)&WB_IsIntrinsicAvailable},
2917 {CC"makeMethodNotCompilable0",
2918 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
2919 {CC"testSetDontInlineMethod0",
2920 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
2921 {CC"getMethodCompilationLevel0",
2922 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
2923 {CC"getMethodDecompileCount0",
2924 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodDecompileCount},
2925 {CC"getMethodTrapCount0",
2926 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2927 (void*)&WB_GetMethodTrapCount},
2928 {CC"getDeoptCount0",
2929 CC"(Ljava/lang/String;Ljava/lang/String;)I", (void*)&WB_GetDeoptCount},
2930 {CC"getMethodEntryBci0",
2931 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
2932 {CC"getCompileQueueSize",
2933 CC"(I)I", (void*)&WB_GetCompileQueueSize},
2934 {CC"testSetForceInlineMethod0",
2935 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
2936 {CC"enqueueMethodForCompilation0",
2937 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
2938 {CC"enqueueInitializerForCompilation0",
2939 CC"(Ljava/lang/Class;I)Z", (void*)&WB_EnqueueInitializerForCompilation},
2940 {CC"markMethodProfiled",
2941 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_MarkMethodProfiled},
2942 {CC"clearMethodState0",
2943 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
2944 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
2945 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
2946 {CC"matchesMethod",
2947 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2948 (void*)&WB_MatchesMethod},
2949 {CC"matchesInline",
2950 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2951 (void*)&WB_MatchesInline},
2952 {CC"shouldPrintAssembly",
2953 CC"(Ljava/lang/reflect/Executable;I)Z",
2954 (void*)&WB_ShouldPrintAssembly},
2955
2956 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
2957 {CC"isDefaultVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsDefaultVMFlag},
2958 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
2959 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
2960 {CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
2961 {CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
2962 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
2963 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
2964 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
2965 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
2966 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
2967 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
2968 (void*)&WB_SetStringVMFlag},
2969 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
2970 (void*)&WB_GetBooleanVMFlag},
2971 {CC"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2972 (void*)&WB_GetIntVMFlag},
2973 {CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2974 (void*)&WB_GetUintVMFlag},
2975 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2976 (void*)&WB_GetIntxVMFlag},
2977 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2978 (void*)&WB_GetUintxVMFlag},
2979 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2980 (void*)&WB_GetUint64VMFlag},
2981 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2982 (void*)&WB_GetSizeTVMFlag},
2983 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
2984 (void*)&WB_GetDoubleVMFlag},
2985 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
2986 (void*)&WB_GetStringVMFlag},
2987 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
2988 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
2989 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
2990 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
2991 {CC"allocateMetaspace",
2992 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
2993 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
2994 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
2995 {CC"metaspaceSharedRegionAlignment", CC"()J", (void*)&WB_AOTMetaspaceRegionAlignment },
2996 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
2997 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
2998 (void*)&WB_GetNMethod },
2999 {CC"relocateNMethodFromMethod0", CC"(Ljava/lang/reflect/Executable;I)V",
3000 (void*)&WB_RelocateNMethodFromMethod },
3001 {CC"relocateNMethodFromAddr", CC"(JI)V", (void*)&WB_RelocateNMethodFromAddr },
3002 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
3003 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
3004 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
3005 {CC"getCompilationActivityMode",
3006 CC"()I", (void*)&WB_GetCompilationActivityMode},
3007 {CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
3008 (void*)&WB_GetMethodData },
3009 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
3010 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
3011 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
3012 {CC"DefineModule", CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
3013 (void*)&WB_DefineModule },
3014 {CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
3015 (void*)&WB_AddModuleExports },
3016 {CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
3017 (void*)&WB_AddReadsModule },
3018 {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
3019 (void*)&WB_AddModuleExportsToAllUnnamed },
3020 {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
3021 (void*)&WB_AddModuleExportsToAll },
3022 {CC"deflateIdleMonitors", CC"()Z", (void*)&WB_DeflateIdleMonitors },
3023 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
3024 {CC"isAsanEnabled", CC"()Z", (void*)&WB_IsAsanEnabled },
3025 {CC"isUbsanEnabled", CC"()Z", (void*)&WB_IsUbsanEnabled },
3026 {CC"getInUseMonitorCount", CC"()J", (void*)&WB_getInUseMonitorCount },
3027 {CC"getLockStackCapacity", CC"()I", (void*)&WB_getLockStackCapacity },
3028 {CC"supportsRecursiveFastLocking", CC"()Z", (void*)&WB_supportsRecursiveFastLocking },
3029 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
3030 {CC"forceClassLoaderStatsSafepoint", CC"()V", (void*)&WB_ForceClassLoaderStatsSafepoint },
3031 {CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
3032 {CC"getResolvedReferences0", CC"(Ljava/lang/Class;)[Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
3033 {CC"getFieldEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getFieldEntriesLength},
3034 {CC"getFieldCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getFieldCPIndex},
3035 {CC"getMethodEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getMethodEntriesLength},
3036 {CC"getMethodCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getMethodCPIndex},
3037 {CC"getIndyInfoLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getIndyInfoLength},
3038 {CC"getIndyCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getIndyCPIndex},
3039 {CC"printClasses0", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printClasses},
3040 {CC"printMethods0", CC"(Ljava/lang/String;Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printMethods},
3041 {CC"getMethodBooleanOption",
3042 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
3043 (void*)&WB_GetMethodBooleaneOption},
3044 {CC"getMethodIntxOption",
3045 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
3046 (void*)&WB_GetMethodIntxOption},
3047 {CC"getMethodUintxOption",
3048 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
3049 (void*)&WB_GetMethodUintxOption},
3050 {CC"getMethodDoubleOption",
3051 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
3052 (void*)&WB_GetMethodDoubleOption},
3053 {CC"getMethodStringOption",
3054 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
3055 (void*)&WB_GetMethodStringOption},
3056 {CC"getDefaultArchivePath", CC"()Ljava/lang/String;",
3057 (void*)&WB_GetDefaultArchivePath},
3058 {CC"getCDSGenericHeaderMinVersion", CC"()I", (void*)&WB_GetCDSGenericHeaderMinVersion},
3059 {CC"getCurrentCDSVersion", CC"()I", (void*)&WB_GetCDSCurrentVersion},
3060 {CC"isSharingEnabled", CC"()Z", (void*)&WB_IsSharingEnabled},
3061 {CC"isSharedInternedString", CC"(Ljava/lang/String;)Z", (void*)&WB_IsSharedInternedString },
3062 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
3063 {CC"areSharedStringsMapped", CC"()Z", (void*)&WB_AreSharedStringsMapped },
3064 {CC"linkClass", CC"(Ljava/lang/Class;)V", (void*)&WB_LinkClass},
3065 {CC"areOpenArchiveHeapObjectsMapped", CC"()Z", (void*)&WB_AreOpenArchiveHeapObjectsMapped},
3066 {CC"isCDSIncluded", CC"()Z", (void*)&WB_IsCDSIncluded },
3067 {CC"isJFRIncluded", CC"()Z", (void*)&WB_IsJFRIncluded },
3068 {CC"isDTraceIncluded", CC"()Z", (void*)&WB_IsDTraceIncluded },
3069 {CC"hasLibgraal", CC"()Z", (void*)&WB_HasLibgraal },
3070 {CC"isC2OrJVMCIIncluded", CC"()Z", (void*)&WB_isC2OrJVMCIIncluded },
3071 {CC"isJVMCISupportedByGC", CC"()Z", (void*)&WB_IsJVMCISupportedByGC},
3072 {CC"canWriteJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteJavaHeapArchive },
3073 {CC"canWriteMappedJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteMappedJavaHeapArchive },
3074 {CC"canWriteStreamedJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteStreamedJavaHeapArchive },
3075 {CC"cdsMemoryMappingFailed", CC"()Z", (void*)&WB_CDSMemoryMappingFailed },
3076
3077 {CC"clearInlineCaches0", CC"(Z)V", (void*)&WB_ClearInlineCaches },
3078 {CC"handshakeReadMonitors", CC"(Ljava/lang/Thread;)Z", (void*)&WB_HandshakeReadMonitors },
3079 {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
3080 {CC"asyncHandshakeWalkStack", CC"(Ljava/lang/Thread;)V", (void*)&WB_AsyncHandshakeWalkStack },
3081 {CC"lockAndBlock", CC"(Z)V", (void*)&WB_LockAndBlock},
3082 {CC"checkThreadObjOfTerminatingThread", CC"(Ljava/lang/Thread;)V", (void*)&WB_CheckThreadObjOfTerminatingThread },
3083 {CC"verifyFrames", CC"(ZZ)V", (void*)&WB_VerifyFrames },
3084 {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
3085 (void*)&WB_AddCompilerDirective },
3086 {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
3087 {CC"isGCSupported", CC"(I)Z", (void*)&WB_IsGCSupported},
3088 {CC"isGCSupportedByJVMCICompiler", CC"(I)Z", (void*)&WB_IsGCSupportedByJVMCICompiler},
3089 {CC"isGCSelected", CC"(I)Z", (void*)&WB_IsGCSelected},
3090 {CC"isGCSelectedErgonomically", CC"()Z", (void*)&WB_IsGCSelectedErgonomically},
3091 {CC"supportsConcurrentGCBreakpoints", CC"()Z", (void*)&WB_SupportsConcurrentGCBreakpoints},
3092 {CC"concurrentGCAcquireControl0", CC"()V", (void*)&WB_ConcurrentGCAcquireControl},
3093 {CC"concurrentGCReleaseControl0", CC"()V", (void*)&WB_ConcurrentGCReleaseControl},
3094 {CC"concurrentGCRunToIdle0", CC"()V", (void*)&WB_ConcurrentGCRunToIdle},
3095 {CC"concurrentGCRunTo0", CC"(Ljava/lang/String;)Z",
3096 (void*)&WB_ConcurrentGCRunTo},
3097 {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
3098 (void*)&WB_CheckLibSpecifiesNoexecstack},
3099 {CC"isContainerized", CC"()Z", (void*)&WB_IsContainerized },
3100 {CC"validateCgroup",
3101 CC"(ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
3102 (void*)&WB_ValidateCgroup },
3103 {CC"hostPhysicalMemory", CC"()J", (void*)&WB_HostPhysicalMemory },
3104 {CC"hostPhysicalSwap", CC"()J", (void*)&WB_HostPhysicalSwap },
3105 {CC"hostAvailableMemory", CC"()J", (void*)&WB_HostAvailableMemory },
3106 {CC"hostCPUs", CC"()I", (void*)&WB_HostCPUs },
3107 {CC"printOsInfo", CC"()V", (void*)&WB_PrintOsInfo },
3108 {CC"disableElfSectionCache", CC"()V", (void*)&WB_DisableElfSectionCache },
3109 {CC"resolvedMethodItemsCount", CC"()J", (void*)&WB_ResolvedMethodItemsCount },
3110 {CC"getKlassMetadataSize", CC"(Ljava/lang/Class;)I",(void*)&WB_GetKlassMetadataSize},
3111
3112 {CC"createMetaspaceTestContext", CC"(JJ)J", (void*)&WB_CreateMetaspaceTestContext},
3113 {CC"destroyMetaspaceTestContext", CC"(J)V", (void*)&WB_DestroyMetaspaceTestContext},
3114 {CC"purgeMetaspaceTestContext", CC"(J)V", (void*)&WB_PurgeMetaspaceTestContext},
3115 {CC"printMetaspaceTestContext", CC"(J)V", (void*)&WB_PrintMetaspaceTestContext},
3116 {CC"getTotalCommittedBytesInMetaspaceTestContext", CC"(J)J",(void*)&WB_GetTotalCommittedBytesInMetaspaceTestContext},
3117 {CC"getTotalUsedBytesInMetaspaceTestContext", CC"(J)J", (void*)&WB_GetTotalUsedBytesInMetaspaceTestContext},
3118 {CC"createArenaInTestContext", CC"(JZ)J", (void*)&WB_CreateArenaInTestContext},
3119 {CC"destroyMetaspaceTestArena", CC"(J)V", (void*)&WB_DestroyMetaspaceTestArena},
3120 {CC"allocateFromMetaspaceTestArena", CC"(JJ)J", (void*)&WB_AllocateFromMetaspaceTestArena},
3121 {CC"deallocateToMetaspaceTestArena", CC"(JJJ)V", (void*)&WB_DeallocateToMetaspaceTestArena},
3122 {CC"maxMetaspaceAllocationSize", CC"()J", (void*)&WB_GetMaxMetaspaceAllocationSize},
3123
3124 {CC"isJVMTIIncluded", CC"()Z", (void*)&WB_IsJVMTIIncluded},
3125 {CC"waitUnsafe", CC"(I)V", (void*)&WB_WaitUnsafe},
3126 {CC"busyWaitCPUTime", CC"(I)V", (void*)&WB_BusyWaitCPUTime},
3127 {CC"cpuSamplerSetOutOfStackWalking", CC"(Z)Z", (void*)&WB_CPUSamplerSetOutOfStackWalking},
3128 {CC"getLibcName", CC"()Ljava/lang/String;", (void*)&WB_GetLibcName},
3129
3130 {CC"pinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_PinObject},
3131 {CC"unpinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_UnpinObject},
3132 {CC"setVirtualThreadsNotifyJvmtiMode", CC"(Z)Z", (void*)&WB_SetVirtualThreadsNotifyJvmtiMode},
3133 {CC"preTouchMemory", CC"(JJ)V", (void*)&WB_PreTouchMemory},
3134 {CC"cleanMetaspaces", CC"()V", (void*)&WB_CleanMetaspaces},
3135 {CC"rss", CC"()J", (void*)&WB_Rss},
3136 {CC"printString", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_PrintString},
3137 {CC"lockAndStuckInSafepoint", CC"()V", (void*)&WB_TakeLockAndHangInSafepoint},
3138 {CC"getMinimumJavaStackSize", CC"()J", (void*)&WB_GetMinimumJavaStackSize},
3139 {CC"wordSize", CC"()J", (void*)&WB_WordSize},
3140 {CC"rootChunkWordSize", CC"()J", (void*)&WB_RootChunkWordSize},
3141 {CC"isStatic", CC"()Z", (void*)&WB_IsStaticallyLinked},
3142 {CC"controlledCrash",CC"(I)V", (void*)&WB_ControlledCrash},
3143 };
3144
3145 #undef CC
3146
3147 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
3148 {
3149 if (WhiteBoxAPI) {
3150 // Make sure that wbclass is loaded by the null classloader
3151 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(wbclass));
3152 Handle loader(THREAD, ik->class_loader());
3153 if (loader.is_null()) {
3154 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
3155 WhiteBox::set_used();
3156 }
3157 }
3158 }
3159 JVM_END