1 /*
2 * Copyright (c) 2012, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds.h"
26 #include "cds/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 #include "osContainer_linux.hpp"
133 #endif
134
135 #define CHECK_JNI_EXCEPTION_(env, value) \
136 do { \
137 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
138 THREAD->clear_pending_jni_exception_check(); \
139 if (HAS_PENDING_EXCEPTION) { \
140 return(value); \
141 } \
142 } while (0)
143
144 #define CHECK_JNI_EXCEPTION(env) \
145 do { \
146 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
147 THREAD->clear_pending_jni_exception_check(); \
148 if (HAS_PENDING_EXCEPTION) { \
149 return; \
150 } \
151 } while (0)
152
153 bool WhiteBox::_used = false;
154 volatile bool WhiteBox::compilation_locked = false;
155
156 class VM_WhiteBoxOperation : public VM_Operation {
157 public:
158 VM_WhiteBoxOperation() { }
159 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
160 bool allow_nested_vm_operations() const { return true; }
161 };
162
163
164 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
165 return (jlong)(void*)JNIHandles::resolve(obj);
166 WB_END
167
168 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
169 return heapOopSize;
170 WB_END
171
172 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
173 return (jint)os::vm_page_size();
174 WB_END
175
176 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
177 return os::vm_allocation_granularity();
178 WB_END
179
180 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
181 return os::large_page_size();
182 WB_END
183
184 WB_ENTRY(jstring, WB_PrintString(JNIEnv* env, jobject wb, jstring str, jint max_length))
185 ResourceMark rm(THREAD);
186 stringStream sb;
187 java_lang_String::print(JNIHandles::resolve(str), &sb, max_length);
188 oop result = java_lang_String::create_oop_from_str(sb.as_string(), THREAD);
189 return (jstring) JNIHandles::make_local(THREAD, result);
190 WB_END
191
192 WB_ENTRY(jint, WB_TakeLockAndHangInSafepoint(JNIEnv* env, jobject wb))
193 JavaThread* self = JavaThread::current();
194 // VMStatistic_lock is used to minimize interference with VM locking
195 MutexLocker mu(VMStatistic_lock);
196 VM_HangInSafepoint force_safepoint_stuck_op;
197 VMThread::execute(&force_safepoint_stuck_op);
198 ShouldNotReachHere();
199 return 0;
200 WB_END
201
202 class WBIsKlassAliveClosure : public LockedClassesDo {
203 Symbol* _name;
204 int _count;
205 public:
206 WBIsKlassAliveClosure(Symbol* name) : _name(name), _count(0) {}
207
208 void do_klass(Klass* k) {
209 Symbol* ksym = k->name();
210 if (ksym->fast_compare(_name) == 0) {
211 _count++;
212 } else if (k->is_instance_klass()) {
213 // Need special handling for hidden classes because the JVM
214 // appends "+<hex-address>" to hidden class names.
215 InstanceKlass *ik = InstanceKlass::cast(k);
216 if (ik->is_hidden()) {
217 ResourceMark rm;
218 char* k_name = ksym->as_C_string();
219 // Find the first '+' char and truncate the string at that point.
220 // NOTE: This will not work correctly if the original hidden class
221 // name contains a '+'.
222 char* plus_char = strchr(k_name, '+');
223 if (plus_char != nullptr) {
224 *plus_char = 0;
225 char* c_name = _name->as_C_string();
226 if (strcmp(c_name, k_name) == 0) {
227 _count++;
228 }
229 }
230 }
231 }
232 }
233
234 int count() const {
235 return _count;
236 }
237 };
238
239 WB_ENTRY(jint, WB_CountAliveClasses(JNIEnv* env, jobject target, jstring name))
240 oop h_name = JNIHandles::resolve(name);
241 if (h_name == nullptr) {
242 return 0;
243 }
244 Symbol* sym = java_lang_String::as_symbol(h_name);
245 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
246
247 WBIsKlassAliveClosure closure(sym);
248 ClassLoaderDataGraph::classes_do(&closure);
249
250 // Return the count of alive classes with this name.
251 return closure.count();
252 WB_END
253
254 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
255 oop h_name = JNIHandles::resolve(name);
256 if (h_name == nullptr) {
257 return 0;
258 }
259 Symbol* sym = java_lang_String::as_symbol(h_name);
260 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
261 return (jint)sym->refcount();
262 WB_END
263
264
265 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
266 #if INCLUDE_JVMTI
267 ResourceMark rm;
268 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
269 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
270 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
271 assert(err == JVMTI_ERROR_NONE, "must not fail");
272 #endif
273 }
274 WB_END
275
276 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
277 #if INCLUDE_JVMTI
278 ResourceMark rm;
279 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
280 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
281 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
282 assert(err == JVMTI_ERROR_NONE, "must not fail");
283 #endif
284 }
285 WB_END
286
287
288 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
289 return (jlong)Arguments::max_heap_for_compressed_oops();
290 }
291 WB_END
292
293 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
294 tty->print_cr("Minimum heap %zu Initial heap %zu "
295 "Maximum heap %zu Space alignment %zu Heap alignment %zu",
296 MinHeapSize,
297 InitialHeapSize,
298 MaxHeapSize,
299 SpaceAlignment,
300 HeapAlignment);
301 }
302 WB_END
303
304 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
305 size_t granularity = os::vm_allocation_granularity();
306 ReservedHeapSpace rhs = HeapReserver::reserve(100 * granularity, granularity, os::vm_page_size(), nullptr);
307
308 // Check if constraints are complied
309 if (!( UseCompressedOops && rhs.is_reserved() &&
310 CompressedOops::base() != nullptr &&
311 CompressedOops::use_implicit_null_checks() )) {
312 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
313 "\tUseCompressedOops is %d\n"
314 "\trhs.base() is " PTR_FORMAT "\n"
315 "\tCompressedOops::base() is " PTR_FORMAT "\n"
316 "\tCompressedOops::use_implicit_null_checks() is %d",
317 UseCompressedOops,
318 p2i(rhs.base()),
319 p2i(CompressedOops::base()),
320 CompressedOops::use_implicit_null_checks());
321 return;
322 }
323
324 VirtualSpace vs;
325 vs.initialize(rhs, 50 * granularity);
326
327 tty->print_cr("Reading from no access area... ");
328 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
329 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
330 WB_END
331
332 WB_ENTRY(void, WB_DecodeNKlassAndAccessKlass(JNIEnv* env, jobject o, jint nKlass))
333 assert(UseCompressedClassPointers, "Should only call for UseCompressedClassPointers");
334 const narrowKlass nk = (narrowKlass)nKlass;
335 const Klass* const k = CompressedKlassPointers::decode_not_null_without_asserts(nKlass);
336 printf("WB_DecodeNKlassAndAccessKlass: nk %u k " PTR_FORMAT "\n", nk, p2i(k));
337 printf("Will attempt to crash now...\n");
338 fflush(stdout); // flush now - we will crash below
339 // Access k by calling a virtual function - will result in loading the vtable from *k
340 k->print_on(tty);
341 WB_END
342
343 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
344 size_t magnitude, size_t iterations) {
345 size_t granularity = os::vm_allocation_granularity();
346 ReservedHeapSpace rhs = HeapReserver::reserve(reserved_space_size * granularity, granularity, os::vm_page_size(), nullptr);
347 if (!rhs.is_reserved()) {
348 tty->print_cr("Failed to initialize ReservedSpace. Can't proceed.");
349 return 3;
350 }
351
352 VirtualSpace vs;
353 if (!vs.initialize(rhs, 0)) {
354 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
355 return 3;
356 }
357
358 int seed = os::random();
359 tty->print_cr("Random seed is %d", seed);
360
361 for (size_t i = 0; i < iterations; i++) {
362
363 // Whether we will shrink or grow
364 bool shrink = os::random() % 2L == 0;
365
366 // Get random delta to resize virtual space
367 size_t delta = (size_t)os::random() % magnitude;
368
369 // If we are about to shrink virtual space below zero, then expand instead
370 if (shrink && vs.committed_size() < delta) {
371 shrink = false;
372 }
373
374 // Resizing by delta
375 if (shrink) {
376 vs.shrink_by(delta);
377 } else {
378 // If expanding fails expand_by will silently return false
379 vs.expand_by(delta, true);
380 }
381 }
382 return 0;
383 }
384
385 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
386 jlong reserved_space_size, jlong magnitude, jlong iterations))
387 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
388 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
389 iterations);
390 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
391 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
392 return 1;
393 }
394
395 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
396 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
397 if (sizeof(size_t) < sizeof(jlong)) {
398 jlong size_t_max_value = (jlong)SIZE_MAX;
399 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
400 || iterations > size_t_max_value) {
401 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
402 return 2;
403 }
404 }
405
406 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
407 (size_t) magnitude, (size_t) iterations);
408 WB_END
409
410 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
411 return GCConfig::is_gc_supported((CollectedHeap::Name)name);
412 WB_END
413
414 WB_ENTRY(jboolean, WB_HasLibgraal(JNIEnv* env, jobject o))
415 #if INCLUDE_JVMCI
416 return JVMCI::shared_library_exists();
417 #endif
418 return false;
419 WB_END
420
421 WB_ENTRY(jboolean, WB_IsGCSupportedByJVMCICompiler(JNIEnv* env, jobject o, jint name))
422 #if INCLUDE_JVMCI
423 if (EnableJVMCI) {
424 // Enter the JVMCI env that will be used by the CompileBroker.
425 JVMCIEnv jvmciEnv(thread, __FILE__, __LINE__);
426 return jvmciEnv.init_error() == JNI_OK && jvmciEnv.runtime()->is_gc_supported(&jvmciEnv, (CollectedHeap::Name)name);
427 }
428 #endif
429 return false;
430 WB_END
431
432 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
433 return GCConfig::is_gc_selected((CollectedHeap::Name)name);
434 WB_END
435
436 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
437 return GCConfig::is_gc_selected_ergonomically();
438 WB_END
439
440 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
441 oop p = JNIHandles::resolve(obj);
442 #if INCLUDE_G1GC
443 if (UseG1GC) {
444 G1CollectedHeap* g1h = G1CollectedHeap::heap();
445 const G1HeapRegion* hr = g1h->heap_region_containing(p);
446 return hr->is_old_or_humongous();
447 }
448 #endif
449 #if INCLUDE_PARALLELGC
450 if (UseParallelGC) {
451 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
452 return !psh->is_in_young(p);
453 }
454 #endif
455 #if INCLUDE_ZGC
456 if (UseZGC) {
457 return ZHeap::heap()->is_old(to_zaddress(p));
458 }
459 #endif
460 #if INCLUDE_SHENANDOAHGC
461 if (UseShenandoahGC) {
462 ShenandoahHeap* sh = ShenandoahHeap::heap();
463 return sh->mode()->is_generational() ? sh->is_in_old(p) : sh->is_in(p);
464 }
465 #endif
466 #if INCLUDE_SERIALGC
467 if (UseSerialGC) {
468 return !SerialHeap::heap()->is_in_young(p);
469 }
470 #endif
471 ShouldNotReachHere();
472 return false;
473 WB_END
474
475 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
476 oop p = JNIHandles::resolve(obj);
477 return p->size() * HeapWordSize;
478 WB_END
479
480 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
481 return (jlong)SpaceAlignment;
482 WB_END
483
484 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
485 return (jlong)HeapAlignment;
486 WB_END
487
488 WB_ENTRY(jboolean, WB_SupportsConcurrentGCBreakpoints(JNIEnv* env, jobject o))
489 return Universe::heap()->supports_concurrent_gc_breakpoints();
490 WB_END
491
492 WB_ENTRY(void, WB_ConcurrentGCAcquireControl(JNIEnv* env, jobject o))
493 ConcurrentGCBreakpoints::acquire_control();
494 WB_END
495
496 WB_ENTRY(void, WB_ConcurrentGCReleaseControl(JNIEnv* env, jobject o))
497 ConcurrentGCBreakpoints::release_control();
498 WB_END
499
500 WB_ENTRY(void, WB_ConcurrentGCRunToIdle(JNIEnv* env, jobject o))
501 ConcurrentGCBreakpoints::run_to_idle();
502 WB_END
503
504 WB_ENTRY(jboolean, WB_ConcurrentGCRunTo(JNIEnv* env, jobject o, jobject at))
505 Handle h_name(THREAD, JNIHandles::resolve(at));
506 ResourceMark rm;
507 const char* c_name = java_lang_String::as_utf8_string(h_name());
508 return ConcurrentGCBreakpoints::run_to(c_name);
509 WB_END
510
511 WB_ENTRY(jboolean, WB_ShipDebugInfoFull(JNIEnv* env, jobject o))
512 #if defined(SHIP_DEBUGINFO_FULL)
513 return true;
514 #else
515 return false;
516 #endif
517 WB_END
518
519 WB_ENTRY(jboolean, WB_ShipDebugInfoPublic(JNIEnv* env, jobject o))
520 #if defined(SHIP_DEBUGINFO_PUBLIC)
521 return true;
522 #else
523 return false;
524 #endif
525 WB_END
526
527 #if INCLUDE_G1GC
528
529 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
530 if (UseG1GC) {
531 G1CollectedHeap* g1h = G1CollectedHeap::heap();
532 oop result = JNIHandles::resolve(obj);
533 const G1HeapRegion* hr = g1h->heap_region_containing(result);
534 return hr->is_humongous();
535 }
536 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
537 WB_END
538
539 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
540 if (UseG1GC) {
541 G1CollectedHeap* g1h = G1CollectedHeap::heap();
542 const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
543 return hr->is_humongous();
544 }
545 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
546 WB_END
547
548 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
549 if (UseG1GC) {
550 G1CollectedHeap* g1h = G1CollectedHeap::heap();
551 const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
552 return hr->is_free();
553 }
554 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
555 WB_END
556
557 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
558 if (UseG1GC) {
559 G1CollectedHeap* g1h = G1CollectedHeap::heap();
560 size_t nr = g1h->max_num_regions();
561 return (jlong)nr;
562 }
563 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
564 WB_END
565
566 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
567 if (UseG1GC) {
568 G1CollectedHeap* g1h = G1CollectedHeap::heap();
569 size_t nr = g1h->num_free_regions();
570 return (jlong)nr;
571 }
572 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
573 WB_END
574
575 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
576 if (UseG1GC) {
577 G1CollectedHeap* g1h = G1CollectedHeap::heap();
578 return g1h->concurrent_mark()->cm_thread()->in_progress();
579 }
580 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
581 WB_END
582
583 WB_ENTRY(jint, WB_G1CompletedConcurrentMarkCycles(JNIEnv* env, jobject o))
584 if (UseG1GC) {
585 G1CollectedHeap* g1h = G1CollectedHeap::heap();
586 G1ConcurrentMark* cm = g1h->concurrent_mark();
587 return cm->completed_mark_cycles();
588 }
589 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1CompletedConcurrentMarkCycles: G1 GC is not enabled");
590 WB_END
591
592 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
593 if (UseG1GC) {
594 return (jint)G1HeapRegion::GrainBytes;
595 }
596 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
597 WB_END
598
599 WB_ENTRY(jboolean, WB_G1HasRegionsToUncommit(JNIEnv* env, jobject o))
600 if (UseG1GC) {
601 return G1CollectedHeap::heap()->has_uncommittable_regions();
602 }
603 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1HasRegionsToUncommit: G1 GC is not enabled");
604 WB_END
605
606 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
607 if (UseG1GC) {
608 ResourceMark rm(THREAD);
609 G1CollectedHeap* g1h = G1CollectedHeap::heap();
610 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
611 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
612 return JNIHandles::make_local(THREAD, h());
613 }
614 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
615 WB_END
616
617 WB_ENTRY(jint, WB_G1ActiveMemoryNodeCount(JNIEnv* env, jobject o))
618 if (UseG1GC) {
619 G1NUMA* numa = G1NUMA::numa();
620 return (jint)numa->num_active_nodes();
621 }
622 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1ActiveMemoryNodeCount: G1 GC is not enabled");
623 WB_END
624
625 WB_ENTRY(jintArray, WB_G1MemoryNodeIds(JNIEnv* env, jobject o))
626 if (UseG1GC) {
627 G1NUMA* numa = G1NUMA::numa();
628 int num_node_ids = checked_cast<int>(numa->num_active_nodes());
629 const uint* node_ids = numa->node_ids();
630
631 typeArrayOop result = oopFactory::new_intArray(num_node_ids, CHECK_NULL);
632 for (int i = 0; i < num_node_ids; i++) {
633 result->int_at_put(i, checked_cast<jint>(node_ids[i]));
634 }
635 return (jintArray) JNIHandles::make_local(THREAD, result);
636 }
637 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1MemoryNodeIds: G1 GC is not enabled");
638 WB_END
639
640 class OldRegionsLivenessClosure: public G1HeapRegionClosure {
641
642 private:
643 const int _liveness;
644 size_t _total_count;
645 size_t _total_memory;
646 size_t _total_memory_to_free;
647
648 public:
649 OldRegionsLivenessClosure(int liveness) :
650 _liveness(liveness),
651 _total_count(0),
652 _total_memory(0),
653 _total_memory_to_free(0) { }
654
655 size_t total_count() { return _total_count; }
656 size_t total_memory() { return _total_memory; }
657 size_t total_memory_to_free() { return _total_memory_to_free; }
658
659 bool do_heap_region(G1HeapRegion* r) {
660 if (r->is_old()) {
661 size_t live = r->live_bytes();
662 size_t size = r->used();
663 size_t reg_size = G1HeapRegion::GrainBytes;
664 if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
665 _total_memory += size;
666 ++_total_count;
667 if (size == reg_size) {
668 // We don't include non-full regions since they are unlikely included in mixed gc
669 // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
670 _total_memory_to_free += size - live;
671 }
672 }
673 }
674 return false;
675 }
676 };
677
678
679 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
680 if (!UseG1GC) {
681 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
682 }
683 if (liveness < 0) {
684 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
685 }
686
687 G1CollectedHeap* g1h = G1CollectedHeap::heap();
688 OldRegionsLivenessClosure rli(liveness);
689 g1h->heap_region_iterate(&rli);
690
691 typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
692 result->long_at_put(0, rli.total_count());
693 result->long_at_put(1, rli.total_memory());
694 result->long_at_put(2, rli.total_memory_to_free());
695 return (jlongArray) JNIHandles::make_local(THREAD, result);
696 WB_END
697
698 #endif // INCLUDE_G1GC
699
700 // Alloc memory using the test memory tag so that we can use that to see if
701 // NMT picks it up correctly
702 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
703 jlong addr = 0;
704 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
705 return addr;
706 WB_END
707
708 // Alloc memory with pseudo call stack. The test can create pseudo malloc
709 // allocation site to stress the malloc tracking.
710 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
711 address pc = (address)(size_t)pseudo_stack;
712 NativeCallStack stack(&pc, 1);
713 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
714 WB_END
715
716 // Alloc memory with pseudo call stack and specific memory tag.
717 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint mem_tag))
718 address pc = (address)(size_t)pseudo_stack;
719 NativeCallStack stack(&pc, 1);
720 return (jlong)(uintptr_t)os::malloc(size, (MemTag)mem_tag, stack);
721 WB_END
722
723 // Free the memory allocated by NMTAllocTest
724 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
725 os::free((void*)(uintptr_t)mem);
726 WB_END
727
728 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
729 return (jlong)(uintptr_t)os::reserve_memory(size, mtTest);
730 WB_END
731
732 WB_ENTRY(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
733 return (jlong)(uintptr_t)os::attempt_reserve_memory_at((char*)(uintptr_t)addr, (size_t)size, mtTest);
734 WB_END
735
736 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
737 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
738 WB_END
739
740 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
741 os::uncommit_memory((char *)(uintptr_t)addr, size);
742 WB_END
743
744 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
745 os::release_memory((char *)(uintptr_t)addr, size);
746 WB_END
747
748 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
749 int hash_size = MallocSiteTable::hash_buckets();
750 assert(hash_size > 0, "NMT hash_size should be > 0");
751 return (jint)hash_size;
752 WB_END
753
754 WB_ENTRY(jlong, WB_NMTNewArena(JNIEnv* env, jobject o, jlong init_size))
755 Arena* arena = new (mtTest) Arena(mtTest, Arena::Tag::tag_other, size_t(init_size));
756 return (jlong)arena;
757 WB_END
758
759 WB_ENTRY(void, WB_NMTFreeArena(JNIEnv* env, jobject o, jlong arena))
760 Arena* a = (Arena*)arena;
761 delete a;
762 WB_END
763
764 WB_ENTRY(void, WB_NMTArenaMalloc(JNIEnv* env, jobject o, jlong arena, jlong size))
765 Arena* a = (Arena*)arena;
766 a->Amalloc(size_t(size));
767 WB_END
768
769 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
770 assert(method != nullptr, "method should not be null");
771 ThreadToNativeFromVM ttn(thread);
772 return env->FromReflectedMethod(method);
773 }
774
775 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
776 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
777 private:
778 int _result;
779 const bool _make_not_entrant;
780 public:
781 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
782 _result(0), _make_not_entrant(make_not_entrant) { }
783 int result() const { return _result; }
784
785 void doit() {
786 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
787 if (t->has_last_Java_frame()) {
788 for (StackFrameStream fst(t, false /* update */, true /* process_frames */); !fst.is_done(); fst.next()) {
789 frame* f = fst.current();
790 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
791 Deoptimization::deoptimize(t, *f);
792 if (_make_not_entrant) {
793 nmethod* nm = CodeCache::find_nmethod(f->pc());
794 assert(nm != nullptr, "did not find nmethod");
795 nm->make_not_entrant(nmethod::InvalidationReason::WHITEBOX_DEOPTIMIZATION);
796 }
797 ++_result;
798 }
799 }
800 }
801 }
802 }
803 };
804
805 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
806 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
807 VMThread::execute(&op);
808 return op.result();
809 WB_END
810
811 WB_ENTRY(jboolean, WB_IsFrameDeoptimized(JNIEnv* env, jobject o, jint depth))
812 bool result = false;
813 if (thread->has_last_Java_frame()) {
814 ResourceMark rm(THREAD);
815 RegisterMap reg_map(thread,
816 RegisterMap::UpdateMap::include,
817 RegisterMap::ProcessFrames::include,
818 RegisterMap::WalkContinuation::skip);
819 javaVFrame *jvf = thread->last_java_vframe(®_map);
820 for (jint d = 0; d < depth && jvf != nullptr; d++) {
821 jvf = jvf->java_sender();
822 }
823 result = jvf != nullptr && jvf->fr().is_deoptimized_frame();
824 }
825 return result;
826 WB_END
827
828 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
829 DeoptimizationScope deopt_scope;
830 CodeCache::mark_all_nmethods_for_deoptimization(&deopt_scope);
831 deopt_scope.deoptimize_marked();
832 WB_END
833
834 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
835 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
836 int result = 0;
837 CHECK_JNI_EXCEPTION_(env, result);
838
839 DeoptimizationScope deopt_scope;
840 {
841 MutexLocker mu(Compile_lock);
842 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
843 if (is_osr) {
844 result += mh->method_holder()->mark_osr_nmethods(&deopt_scope, mh());
845 } else {
846 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
847 if (mh->code() != nullptr) {
848 deopt_scope.mark(mh->code());
849 ++result;
850 }
851 }
852 CodeCache::mark_for_deoptimization(&deopt_scope, mh());
853 }
854
855 deopt_scope.deoptimize_marked();
856
857 return result;
858 WB_END
859
860 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
861 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
862 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
863 MutexLocker mu(Compile_lock);
864 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
865 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
866 if (code == nullptr) {
867 return JNI_FALSE;
868 }
869 return !code->is_marked_for_deoptimization();
870 WB_END
871
872 static bool is_excluded_for_compiler(AbstractCompiler* comp, methodHandle& mh) {
873 if (comp == nullptr) {
874 return true;
875 }
876 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
877 bool exclude = directive->ExcludeOption;
878 DirectivesStack::release(directive);
879 return exclude;
880 }
881
882 static bool can_be_compiled_at_level(methodHandle& mh, jboolean is_osr, int level) {
883 if (is_osr) {
884 return CompilationPolicy::can_be_osr_compiled(mh, level);
885 } else {
886 return CompilationPolicy::can_be_compiled(mh, level);
887 }
888 }
889
890 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
891 if (method == nullptr || comp_level > CompilationPolicy::highest_compile_level()) {
892 return false;
893 }
894 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
895 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
896 MutexLocker mu(Compile_lock);
897 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
898
899 // The ExcludeOption directive is evaluated lazily upon compilation attempt. If a method was not tried to be compiled by
900 // a compiler, yet, the method object is not set to be not compilable by that compiler. Thus, evaluate the compiler directive
901 // to exclude a compilation of 'method'.
902 if (comp_level == CompLevel_any) {
903 // Both compilers could have ExcludeOption set. Check all combinations.
904 bool excluded_c1 = is_excluded_for_compiler(CompileBroker::compiler1(), mh);
905 bool excluded_c2 = is_excluded_for_compiler(CompileBroker::compiler2(), mh);
906 if (excluded_c1 && excluded_c2) {
907 // Compilation of 'method' excluded by both compilers.
908 return false;
909 }
910
911 if (excluded_c1) {
912 // C1 only has ExcludeOption set: Check if compilable with C2.
913 return can_be_compiled_at_level(mh, is_osr, CompLevel_full_optimization);
914 } else if (excluded_c2) {
915 // C2 only has ExcludeOption set: Check if compilable with C1.
916 return can_be_compiled_at_level(mh, is_osr, CompLevel_simple);
917 }
918 } else if (comp_level > CompLevel_none && is_excluded_for_compiler(CompileBroker::compiler((int)comp_level), mh)) {
919 // Compilation of 'method' excluded by compiler used for 'comp_level'.
920 return false;
921 }
922
923 return can_be_compiled_at_level(mh, is_osr, (int)comp_level);
924 WB_END
925
926 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
927 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
928 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
929 MutexLocker mu(Compile_lock);
930 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
931 return mh->queued_for_compilation();
932 WB_END
933
934 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
935 if (compLevel < CompLevel_none || compLevel > CompilationPolicy::highest_compile_level()) {
936 return false; // Intrinsic is not available on a non-existent compilation level.
937 }
938 AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
939 if (comp == nullptr) {
940 // Could have compLevel == 0, or !TieredCompilation and incompatible values of TieredStopAtLevel and compLevel.
941 tty->print_cr("WB error: no compiler for requested compilation level %d", compLevel);
942 return false;
943 }
944
945 jmethodID method_id, compilation_context_id;
946 method_id = reflected_method_to_jmid(thread, env, method);
947 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
948 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
949
950 DirectiveSet* directive;
951 if (compilation_context != nullptr) {
952 compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
953 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
954 methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
955 directive = DirectivesStack::getMatchingDirective(cch, comp);
956 } else {
957 // Calling with null matches default directive
958 directive = DirectivesStack::getDefaultDirective(comp);
959 }
960 bool result = comp->is_intrinsic_available(mh, directive);
961 DirectivesStack::release(directive);
962 return result;
963 WB_END
964
965 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
966 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
967 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
968 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
969 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
970 return (code != nullptr ? code->comp_level() : CompLevel_none);
971 WB_END
972
973 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
974 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
975 CHECK_JNI_EXCEPTION(env);
976 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
977 if (is_osr) {
978 mh->set_not_osr_compilable("WhiteBox", comp_level);
979 } else {
980 mh->set_not_compilable("WhiteBox", comp_level);
981 }
982 WB_END
983
984 WB_ENTRY(jint, WB_GetMethodDecompileCount(JNIEnv* env, jobject o, jobject method))
985 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
986 CHECK_JNI_EXCEPTION_(env, 0);
987 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
988 uint cnt = 0;
989 MethodData* mdo = mh->method_data();
990 if (mdo != nullptr) {
991 cnt = mdo->decompile_count();
992 }
993 return cnt;
994 WB_END
995
996 // Get the trap count of a method for a specific reason. If the trap count for
997 // that reason did overflow, this includes the overflow trap count of the method.
998 // If 'reason' is null, the sum of the traps for all reasons will be returned.
999 // This number includes the overflow trap count if the trap count for any reason
1000 // did overflow.
1001 WB_ENTRY(jint, WB_GetMethodTrapCount(JNIEnv* env, jobject o, jobject method, jstring reason_obj))
1002 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1003 CHECK_JNI_EXCEPTION_(env, 0);
1004 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1005 uint cnt = 0;
1006 MethodData* mdo = mh->method_data();
1007 if (mdo != nullptr) {
1008 ResourceMark rm(THREAD);
1009 char* reason_str = (reason_obj == nullptr) ?
1010 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1011 bool overflow = false;
1012 for (uint reason = 0; reason < mdo->trap_reason_limit(); reason++) {
1013 if (reason_str != nullptr && !strcmp(reason_str, Deoptimization::trap_reason_name(reason))) {
1014 cnt = mdo->trap_count(reason);
1015 // Count in the overflow trap count on overflow
1016 if (cnt == (uint)-1) {
1017 cnt = mdo->trap_count_limit() + mdo->overflow_trap_count();
1018 }
1019 break;
1020 } else if (reason_str == nullptr) {
1021 uint c = mdo->trap_count(reason);
1022 if (c == (uint)-1) {
1023 c = mdo->trap_count_limit();
1024 if (!overflow) {
1025 // Count overflow trap count just once
1026 overflow = true;
1027 c += mdo->overflow_trap_count();
1028 }
1029 }
1030 cnt += c;
1031 }
1032 }
1033 }
1034 return cnt;
1035 WB_END
1036
1037 WB_ENTRY(jint, WB_GetDeoptCount(JNIEnv* env, jobject o, jstring reason_obj, jstring action_obj))
1038 if (reason_obj == nullptr && action_obj == nullptr) {
1039 return Deoptimization::total_deoptimization_count();
1040 }
1041 ResourceMark rm(THREAD);
1042 const char *reason_str = (reason_obj == nullptr) ?
1043 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1044 const char *action_str = (action_obj == nullptr) ?
1045 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(action_obj));
1046
1047 return Deoptimization::deoptimization_count(reason_str, action_str);
1048 WB_END
1049
1050 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
1051 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1052 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
1053 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1054 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
1055 return (code != nullptr && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
1056 WB_END
1057
1058 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1059 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1060 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1061 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1062 bool result = mh->dont_inline();
1063 mh->set_dont_inline(value == JNI_TRUE);
1064 return result;
1065 WB_END
1066
1067 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
1068 if (comp_level == CompLevel_any) {
1069 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
1070 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
1071 } else {
1072 return CompileBroker::queue_size(comp_level);
1073 }
1074 WB_END
1075
1076 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1077 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1078 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1079 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1080 bool result = mh->force_inline();
1081 mh->set_force_inline(value == JNI_TRUE);
1082 return result;
1083 WB_END
1084
1085 #ifdef LINUX
1086 bool WhiteBox::validate_cgroup(bool cgroups_v2_enabled,
1087 const char* controllers_file,
1088 const char* proc_self_cgroup,
1089 const char* proc_self_mountinfo,
1090 u1* cg_flags) {
1091 CgroupInfo cg_infos[CG_INFO_LENGTH];
1092 return CgroupSubsystemFactory::determine_type(cg_infos, cgroups_v2_enabled, controllers_file,
1093 proc_self_cgroup,
1094 proc_self_mountinfo, cg_flags);
1095 }
1096 #endif
1097
1098 bool WhiteBox::is_asan_enabled() {
1099 #ifdef ADDRESS_SANITIZER
1100 return true;
1101 #else
1102 return false;
1103 #endif
1104 }
1105
1106 bool WhiteBox::is_ubsan_enabled() {
1107 #ifdef UNDEFINED_BEHAVIOR_SANITIZER
1108 return true;
1109 #else
1110 return false;
1111 #endif
1112 }
1113
1114 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, JavaThread* THREAD) {
1115 // Screen for unavailable/bad comp level or null method
1116 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1117 if (method == nullptr) {
1118 tty->print_cr("WB error: request to compile null method");
1119 return false;
1120 }
1121 if (method->is_abstract()) {
1122 tty->print_cr("WB error: request to compile abstract method");
1123 return false;
1124 }
1125 if (comp_level > CompilationPolicy::highest_compile_level()) {
1126 tty->print_cr("WB error: invalid compilation level %d", comp_level);
1127 return false;
1128 }
1129 if (comp == nullptr) {
1130 tty->print_cr("WB error: no compiler for requested compilation level %d", comp_level);
1131 return false;
1132 }
1133
1134 // Check if compilation is blocking
1135 methodHandle mh(THREAD, method);
1136 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
1137 bool is_blocking = !directive->BackgroundCompilationOption;
1138 DirectivesStack::release(directive);
1139
1140 // Compile method and check result
1141 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh->invocation_count(), CompileTask::Reason_Whitebox, CHECK_false);
1142 MutexLocker mu(THREAD, Compile_lock);
1143 bool is_queued = mh->queued_for_compilation();
1144 if ((!is_blocking && is_queued) || nm != nullptr) {
1145 return true;
1146 }
1147 // Check code again because compilation may be finished before Compile_lock is acquired.
1148 if (bci == InvocationEntryBci) {
1149 nmethod* code = mh->code();
1150 if (code != nullptr) {
1151 return true;
1152 }
1153 } else if (mh->lookup_osr_nmethod_for(bci, comp_level, false) != nullptr) {
1154 return true;
1155 }
1156 tty->print("WB error: failed to %s compile at level %d method ", is_blocking ? "blocking" : "", comp_level);
1157 mh->print_short_name(tty);
1158 tty->cr();
1159 if (is_blocking && is_queued) {
1160 tty->print_cr("WB error: blocking compilation is still in queue!");
1161 }
1162 return false;
1163 }
1164
1165 size_t WhiteBox::get_in_use_monitor_count() {
1166 return ObjectSynchronizer::_in_use_list.count();
1167 }
1168
1169 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1170 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1171 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1172 return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1173 WB_END
1174
1175 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1176 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1177 Method* clinit = ik->class_initializer();
1178 if (clinit == nullptr || clinit->method_holder()->is_not_initialized()) {
1179 return false;
1180 }
1181 return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1182 WB_END
1183
1184 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1185 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1186 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1187
1188 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1189 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
1190 bool result = directive->PrintAssemblyOption;
1191 DirectivesStack::release(directive);
1192
1193 return result;
1194 WB_END
1195
1196 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1197 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1198 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1199
1200 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1201
1202 ResourceMark rm(THREAD);
1203 const char* error_msg = nullptr;
1204 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1205 InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1206
1207 if (m == nullptr) {
1208 assert(error_msg != nullptr, "Always have an error message");
1209 tty->print_cr("Got error: %s", error_msg);
1210 return -1; // Pattern failed
1211 }
1212
1213 // Pattern works - now check if it matches
1214 int result;
1215 if (m->match(mh, InlineMatcher::force_inline)) {
1216 result = 2; // Force inline match
1217 } else if (m->match(mh, InlineMatcher::dont_inline)) {
1218 result = 1; // Dont inline match
1219 } else {
1220 result = 0; // No match
1221 }
1222 delete m;
1223 return result;
1224 WB_END
1225
1226 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1227 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1228 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1229
1230 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1231
1232 ResourceMark rm;
1233 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1234
1235 const char* error_msg = nullptr;
1236
1237 BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg, false);
1238 if (m == nullptr) {
1239 assert(error_msg != nullptr, "Must have error_msg");
1240 tty->print_cr("Got error: %s", error_msg);
1241 return -1;
1242 }
1243
1244 // Pattern works - now check if it matches
1245 int result = m->matches(mh);
1246 delete m;
1247 assert(result == 0 || result == 1, "Result out of range");
1248 return result;
1249 WB_END
1250
1251 WB_ENTRY(void, WB_MarkMethodProfiled(JNIEnv* env, jobject o, jobject method))
1252 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1253 CHECK_JNI_EXCEPTION(env);
1254 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1255
1256 MethodData* mdo = mh->method_data();
1257 if (mdo == nullptr) {
1258 Method::build_profiling_method_data(mh, CHECK_AND_CLEAR);
1259 mdo = mh->method_data();
1260 }
1261 mdo->init();
1262 InvocationCounter* icnt = mdo->invocation_counter();
1263 InvocationCounter* bcnt = mdo->backedge_counter();
1264 // set i-counter according to CompilationPolicy::is_method_profiled
1265 icnt->set(Tier4MinInvocationThreshold);
1266 bcnt->set(Tier4CompileThreshold);
1267 WB_END
1268
1269 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1270 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1271 CHECK_JNI_EXCEPTION(env);
1272 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1273 MutexLocker mu(THREAD, Compile_lock);
1274 MethodData* mdo = mh->method_data();
1275 MethodCounters* mcs = mh->method_counters();
1276
1277 if (mdo != nullptr) {
1278 mdo->init();
1279 ResourceMark rm(THREAD);
1280 int arg_count = mdo->method()->size_of_parameters();
1281 for (int i = 0; i < arg_count; i++) {
1282 mdo->set_arg_modified(i, 0);
1283 }
1284 mdo->clean_method_data(/*always_clean*/true);
1285 }
1286
1287 mh->clear_is_not_c1_compilable();
1288 mh->clear_is_not_c2_compilable();
1289 mh->clear_is_not_c2_osr_compilable();
1290 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1291 if (mcs != nullptr) {
1292 mcs->clear_counters();
1293 }
1294 WB_END
1295
1296 template <typename T, int type_enum>
1297 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1298 if (name == nullptr) {
1299 return false;
1300 }
1301 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1302 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1303 CHECK_JNI_EXCEPTION_(env, false);
1304 const JVMFlag* flag = JVMFlag::find_declared_flag(flag_name);
1305 JVMFlag::Error result = JVMFlagAccess::get<T, type_enum>(flag, value);
1306 env->ReleaseStringUTFChars(name, flag_name);
1307 return (result == JVMFlag::SUCCESS);
1308 }
1309
1310 template <typename T, int type_enum>
1311 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1312 if (name == nullptr) {
1313 return false;
1314 }
1315 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1316 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1317 CHECK_JNI_EXCEPTION_(env, false);
1318 JVMFlag* flag = JVMFlag::find_flag(flag_name);
1319 JVMFlag::Error result = JVMFlagAccess::set<T, type_enum>(flag, value, JVMFlagOrigin::INTERNAL);
1320 env->ReleaseStringUTFChars(name, flag_name);
1321 return (result == JVMFlag::SUCCESS);
1322 }
1323
1324 template <typename T>
1325 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1326 ResourceMark rm(thread);
1327 jclass clazz = env->FindClass(name->as_C_string());
1328 CHECK_JNI_EXCEPTION_(env, nullptr);
1329 jmethodID methodID = env->GetStaticMethodID(clazz,
1330 vmSymbols::valueOf_name()->as_C_string(),
1331 sig->as_C_string());
1332 CHECK_JNI_EXCEPTION_(env, nullptr);
1333 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1334 CHECK_JNI_EXCEPTION_(env, nullptr);
1335 return result;
1336 }
1337
1338 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1339 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1340 }
1341 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1342 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1343 }
1344 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1345 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1346 }
1347 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1348 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1349 }*/
1350 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1351 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1352 }
1353
1354 static const JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1355 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1356 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1357 CHECK_JNI_EXCEPTION_(env, nullptr);
1358 const JVMFlag* result = JVMFlag::find_declared_flag(flag_name);
1359 env->ReleaseStringUTFChars(name, flag_name);
1360 return result;
1361 }
1362
1363 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1364 const JVMFlag* flag = getVMFlag(thread, env, name);
1365 return (flag != nullptr) && flag->is_constant_in_binary();
1366 WB_END
1367
1368 WB_ENTRY(jboolean, WB_IsDefaultVMFlag(JNIEnv* env, jobject o, jstring name))
1369 const JVMFlag* flag = getVMFlag(thread, env, name);
1370 return (flag != nullptr) && flag->is_default();
1371 WB_END
1372
1373 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1374 const JVMFlag* flag = getVMFlag(thread, env, name);
1375 return (flag != nullptr) && !(flag->is_unlocked() || flag->is_unlocker());
1376 WB_END
1377
1378 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1379 bool result;
1380 if (GetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result)) {
1381 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1382 return booleanBox(thread, env, result);
1383 }
1384 return nullptr;
1385 WB_END
1386
1387 template <typename T, int type_enum>
1388 jobject GetVMFlag_longBox(JNIEnv* env, JavaThread* thread, jstring name) {
1389 T result;
1390 if (GetVMFlag <T, type_enum> (thread, env, name, &result)) {
1391 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1392 return longBox(thread, env, result);
1393 }
1394 return nullptr;
1395 }
1396
1397 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1398 return GetVMFlag_longBox<JVM_FLAG_TYPE(int)>(env, thread, name);
1399 WB_END
1400
1401 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1402 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint)>(env, thread, name);
1403 WB_END
1404
1405 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1406 return GetVMFlag_longBox<JVM_FLAG_TYPE(intx)>(env, thread, name);
1407 WB_END
1408
1409 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1410 return GetVMFlag_longBox<JVM_FLAG_TYPE(uintx)>(env, thread, name);
1411 WB_END
1412
1413 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1414 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint64_t)>(env, thread, name);
1415 WB_END
1416
1417 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1418 return GetVMFlag_longBox<JVM_FLAG_TYPE(size_t)>(env, thread, name);
1419 WB_END
1420
1421 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1422 double result;
1423 if (GetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result)) {
1424 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1425 return doubleBox(thread, env, result);
1426 }
1427 return nullptr;
1428 WB_END
1429
1430 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1431 ccstr ccstrResult;
1432 if (GetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &ccstrResult)) {
1433 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1434 jstring result = env->NewStringUTF(ccstrResult);
1435 CHECK_JNI_EXCEPTION_(env, nullptr);
1436 return result;
1437 }
1438 return nullptr;
1439 WB_END
1440
1441 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1442 bool result = value == JNI_TRUE ? true : false;
1443 SetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result);
1444 WB_END
1445
1446 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1447 int result = checked_cast<int>(value);
1448 SetVMFlag <JVM_FLAG_TYPE(int)> (thread, env, name, &result);
1449 WB_END
1450
1451 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1452 uint result = checked_cast<uint>(value);
1453 SetVMFlag <JVM_FLAG_TYPE(uint)> (thread, env, name, &result);
1454 WB_END
1455
1456 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1457 intx result = value;
1458 SetVMFlag <JVM_FLAG_TYPE(intx)> (thread, env, name, &result);
1459 WB_END
1460
1461 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1462 uintx result = value;
1463 SetVMFlag <JVM_FLAG_TYPE(uintx)> (thread, env, name, &result);
1464 WB_END
1465
1466 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1467 uint64_t result = value;
1468 SetVMFlag <JVM_FLAG_TYPE(uint64_t)> (thread, env, name, &result);
1469 WB_END
1470
1471 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1472 size_t result = value;
1473 SetVMFlag <JVM_FLAG_TYPE(size_t)> (thread, env, name, &result);
1474 WB_END
1475
1476 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1477 double result = value;
1478 SetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result);
1479 WB_END
1480
1481 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1482 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1483 const char* ccstrValue;
1484 if (value == nullptr) {
1485 ccstrValue = nullptr;
1486 }
1487 else {
1488 ccstrValue = env->GetStringUTFChars(value, nullptr);
1489 CHECK_JNI_EXCEPTION(env);
1490 }
1491 {
1492 ccstr param = ccstrValue;
1493 ThreadInVMfromNative ttvfn(thread); // back to VM
1494 if (SetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, ¶m)) {
1495 assert(param == nullptr, "old value is freed automatically and not returned");
1496 }
1497 }
1498 if (value != nullptr) {
1499 env->ReleaseStringUTFChars(value, ccstrValue);
1500 }
1501 WB_END
1502
1503 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1504 WhiteBox::compilation_locked = true;
1505 WB_END
1506
1507 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1508 MonitorLocker mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1509 WhiteBox::compilation_locked = false;
1510 mo.notify_all();
1511 WB_END
1512
1513 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1514 ResourceMark rm(THREAD);
1515 int len;
1516 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1517 return (StringTable::lookup(name, len) != nullptr);
1518 WB_END
1519
1520 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1521 Universe::heap()->collect(GCCause::_wb_full_gc);
1522 WB_END
1523
1524 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1525 Universe::heap()->collect(GCCause::_wb_young_gc);
1526 WB_END
1527
1528 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1529 // static+volatile in order to force the read to happen
1530 // (not be eliminated by the compiler)
1531 static char c;
1532 static volatile char* p;
1533
1534 p = os::reserve_memory(os::vm_allocation_granularity(), mtTest);
1535 if (p == nullptr) {
1536 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1537 }
1538
1539 c = *p;
1540 WB_END
1541
1542 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1543 const char* features = VM_Version::cpu_info_string();
1544 ThreadToNativeFromVM ttn(thread);
1545 jstring features_string = env->NewStringUTF(features);
1546
1547 CHECK_JNI_EXCEPTION_(env, nullptr);
1548
1549 return features_string;
1550 WB_END
1551
1552 CodeBlobType WhiteBox::get_blob_type(const CodeBlob* code) {
1553 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1554 return CodeCache::get_code_heap(code)->code_blob_type();
1555 }
1556
1557 CodeHeap* WhiteBox::get_code_heap(CodeBlobType blob_type) {
1558 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1559 return CodeCache::get_code_heap(blob_type);
1560 }
1561
1562 struct CodeBlobStub {
1563 CodeBlobStub(const CodeBlob* blob) :
1564 name(os::strdup(blob->name())),
1565 size(blob->size()),
1566 blob_type(static_cast<jint>(WhiteBox::get_blob_type(blob))),
1567 address((jlong) blob),
1568 code_begin((jlong) blob->code_begin()),
1569 is_nmethod((jboolean) blob->is_nmethod()) { }
1570 ~CodeBlobStub() { os::free((void*) name); }
1571 const char* const name;
1572 const jint size;
1573 const jint blob_type;
1574 const jlong address;
1575 const jlong code_begin;
1576 const jboolean is_nmethod;
1577 };
1578
1579 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1580 ResourceMark rm;
1581 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1582 CHECK_JNI_EXCEPTION_(env, nullptr);
1583 jobjectArray result = env->NewObjectArray(6, clazz, nullptr);
1584
1585 jstring name = env->NewStringUTF(cb->name);
1586 CHECK_JNI_EXCEPTION_(env, nullptr);
1587 env->SetObjectArrayElement(result, 0, name);
1588
1589 jobject obj = integerBox(thread, env, cb->size);
1590 CHECK_JNI_EXCEPTION_(env, nullptr);
1591 env->SetObjectArrayElement(result, 1, obj);
1592
1593 obj = integerBox(thread, env, cb->blob_type);
1594 CHECK_JNI_EXCEPTION_(env, nullptr);
1595 env->SetObjectArrayElement(result, 2, obj);
1596
1597 obj = longBox(thread, env, cb->address);
1598 CHECK_JNI_EXCEPTION_(env, nullptr);
1599 env->SetObjectArrayElement(result, 3, obj);
1600
1601 obj = longBox(thread, env, cb->code_begin);
1602 CHECK_JNI_EXCEPTION_(env, nullptr);
1603 env->SetObjectArrayElement(result, 4, obj);
1604
1605 obj = booleanBox(thread, env, cb->is_nmethod);
1606 CHECK_JNI_EXCEPTION_(env, nullptr);
1607 env->SetObjectArrayElement(result, 5, obj);
1608
1609 return result;
1610 }
1611
1612 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1613 ResourceMark rm(THREAD);
1614 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1615 CHECK_JNI_EXCEPTION_(env, nullptr);
1616 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1617 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1618 jobjectArray result = nullptr;
1619 if (code == nullptr) {
1620 return result;
1621 }
1622 int comp_level = code->comp_level();
1623 int insts_size = code->insts_size();
1624
1625 ThreadToNativeFromVM ttn(thread);
1626 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1627 CHECK_JNI_EXCEPTION_(env, nullptr);
1628 result = env->NewObjectArray(5, clazz, nullptr);
1629 if (result == nullptr) {
1630 return result;
1631 }
1632
1633 CodeBlobStub stub(code);
1634 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1635 CHECK_JNI_EXCEPTION_(env, nullptr);
1636 env->SetObjectArrayElement(result, 0, codeBlob);
1637
1638 jobject level = integerBox(thread, env, comp_level);
1639 CHECK_JNI_EXCEPTION_(env, nullptr);
1640 env->SetObjectArrayElement(result, 1, level);
1641
1642 jbyteArray insts = env->NewByteArray(insts_size);
1643 CHECK_JNI_EXCEPTION_(env, nullptr);
1644 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1645 env->SetObjectArrayElement(result, 2, insts);
1646
1647 jobject id = integerBox(thread, env, code->compile_id());
1648 CHECK_JNI_EXCEPTION_(env, nullptr);
1649 env->SetObjectArrayElement(result, 3, id);
1650
1651 jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1652 CHECK_JNI_EXCEPTION_(env, nullptr);
1653 env->SetObjectArrayElement(result, 4, entry_point);
1654
1655 return result;
1656 WB_END
1657
1658 WB_ENTRY(void, WB_RelocateNMethodFromMethod(JNIEnv* env, jobject o, jobject method, jint blob_type))
1659 ResourceMark rm(THREAD);
1660 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1661 CHECK_JNI_EXCEPTION(env);
1662 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1663 nmethod* code = mh->code();
1664 if (code != nullptr) {
1665 MutexLocker ml_Compile_lock(Compile_lock);
1666 CompiledICLocker ic_locker(code);
1667 MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1668 code->relocate(static_cast<CodeBlobType>(blob_type));
1669 }
1670 WB_END
1671
1672 WB_ENTRY(void, WB_RelocateNMethodFromAddr(JNIEnv* env, jobject o, jlong addr, jint blob_type))
1673 ResourceMark rm(THREAD);
1674 CHECK_JNI_EXCEPTION(env);
1675 void* address = (void*) addr;
1676
1677 if (address == nullptr) {
1678 return;
1679 }
1680
1681 MutexLocker ml_Compile_lock(Compile_lock);
1682 MutexLocker ml_CompiledIC_lock(CompiledIC_lock, Mutex::_no_safepoint_check_flag);
1683 MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1684
1685 // Verify that nmethod address is still valid
1686 CodeBlob* blob = CodeCache::find_blob(address);
1687 if (blob != nullptr && blob->is_nmethod()) {
1688 nmethod* code = blob->as_nmethod();
1689 if (code->is_in_use() && !code->is_unloading()) {
1690 CompiledICLocker ic_locker(code);
1691 code->relocate(static_cast<CodeBlobType>(blob_type));
1692 }
1693 }
1694 WB_END
1695
1696 CodeBlob* WhiteBox::allocate_code_blob(int size, CodeBlobType blob_type) {
1697 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1698 BufferBlob* blob;
1699 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1700 if (full_size < size) {
1701 full_size += align_up(size - full_size, oopSize);
1702 }
1703 {
1704 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1705 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1706 if (blob != nullptr) {
1707 ::new (blob) BufferBlob("WB::DummyBlob", CodeBlobKind::Buffer, full_size);
1708 }
1709 }
1710 // Track memory usage statistic after releasing CodeCache_lock
1711 MemoryService::track_code_cache_memory_usage();
1712 return blob;
1713 }
1714
1715 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1716 if (size < 0) {
1717 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1718 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1719 }
1720 return (jlong) WhiteBox::allocate_code_blob(size, static_cast<CodeBlobType>(blob_type));
1721 WB_END
1722
1723 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1724 if (addr == 0) {
1725 return;
1726 }
1727 BufferBlob::free((BufferBlob*) addr);
1728 WB_END
1729
1730 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1731 ResourceMark rm;
1732 GrowableArray<CodeBlobStub*> blobs;
1733 {
1734 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1735 CodeHeap* heap = WhiteBox::get_code_heap(static_cast<CodeBlobType>(blob_type));
1736 if (heap == nullptr) {
1737 return nullptr;
1738 }
1739 for (CodeBlob* cb = (CodeBlob*) heap->first();
1740 cb != nullptr; cb = (CodeBlob*) heap->next(cb)) {
1741 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1742 new (stub) CodeBlobStub(cb);
1743 blobs.append(stub);
1744 }
1745 }
1746 ThreadToNativeFromVM ttn(thread);
1747 jobjectArray result = nullptr;
1748 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1749 CHECK_JNI_EXCEPTION_(env, nullptr);
1750 result = env->NewObjectArray(blobs.length(), clazz, nullptr);
1751 CHECK_JNI_EXCEPTION_(env, nullptr);
1752 if (result == nullptr) {
1753 return result;
1754 }
1755 int i = 0;
1756 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1757 it != blobs.end(); ++it) {
1758 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1759 CHECK_JNI_EXCEPTION_(env, nullptr);
1760 env->SetObjectArrayElement(result, i, obj);
1761 CHECK_JNI_EXCEPTION_(env, nullptr);
1762 ++i;
1763 }
1764 return result;
1765 WB_END
1766
1767 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1768 return CompileBroker::get_compilation_activity_mode();
1769 WB_END
1770
1771 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1772 if (addr == 0) {
1773 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1774 "WB_GetCodeBlob: addr is null");
1775 }
1776 ThreadToNativeFromVM ttn(thread);
1777 CodeBlobStub stub((CodeBlob*) addr);
1778 return codeBlob2objectArray(thread, env, &stub);
1779 WB_END
1780
1781 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1782 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1783 CHECK_JNI_EXCEPTION_(env, 0);
1784 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1785 return (jlong) mh->method_data();
1786 WB_END
1787
1788 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1789 return (jlong) thread->stack_size();
1790 WB_END
1791
1792 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1793 return (jlong) thread->stack_overflow_state()->stack_available(
1794 os::current_stack_pointer()) - (jlong)StackOverflow::stack_shadow_zone_size();
1795 WB_END
1796
1797
1798 int WhiteBox::array_bytes_to_length(size_t bytes) {
1799 return Array<u1>::bytes_to_length(bytes);
1800 }
1801
1802 ///////////////
1803 // MetaspaceTestContext and MetaspaceTestArena
1804 WB_ENTRY(jlong, WB_CreateMetaspaceTestContext(JNIEnv* env, jobject wb, jlong commit_limit, jlong reserve_limit))
1805 assert(is_aligned(commit_limit, BytesPerWord),
1806 "WB_CreateMetaspaceTestContext: commit_limit is not a multiple of the system word byte size");
1807 assert(is_aligned(reserve_limit, BytesPerWord),
1808 "WB_CreateMetaspaceTestContext: reserve_limit is not a multiple of the system word byte size");
1809 metaspace::MetaspaceTestContext* context =
1810 new metaspace::MetaspaceTestContext("whitebox-metaspace-context", (size_t) commit_limit / BytesPerWord,
1811 (size_t) reserve_limit / BytesPerWord);
1812 return (jlong)p2i(context);
1813 WB_END
1814
1815 WB_ENTRY(void, WB_DestroyMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1816 delete (metaspace::MetaspaceTestContext*) context;
1817 WB_END
1818
1819 WB_ENTRY(void, WB_PurgeMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1820 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1821 context0->purge_area();
1822 WB_END
1823
1824 WB_ENTRY(void, WB_PrintMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1825 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1826 context0->print_on(tty);
1827 WB_END
1828
1829 WB_ENTRY(jlong, WB_GetTotalCommittedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1830 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1831 return (jlong)context0->committed_words() * BytesPerWord;
1832 WB_END
1833
1834 WB_ENTRY(jlong, WB_GetTotalUsedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1835 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1836 return (jlong)context0->used_words() * BytesPerWord;
1837 WB_END
1838
1839 WB_ENTRY(jlong, WB_CreateArenaInTestContext(JNIEnv* env, jobject wb, jlong context, jboolean is_micro))
1840 const Metaspace::MetaspaceType type = is_micro ? Metaspace::ClassMirrorHolderMetaspaceType : Metaspace::StandardMetaspaceType;
1841 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1842 return (jlong)p2i(context0->create_arena(type));
1843 WB_END
1844
1845 WB_ENTRY(void, WB_DestroyMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena))
1846 delete (metaspace::MetaspaceTestArena*) arena;
1847 WB_END
1848
1849 WB_ENTRY(jlong, WB_AllocateFromMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong size))
1850 assert(is_aligned(size, BytesPerWord),
1851 "WB_AllocateFromMetaspaceTestArena: size is not a multiple of the system word byte size");
1852 metaspace::MetaspaceTestArena *arena0 = (metaspace::MetaspaceTestArena *)arena;
1853 MetaWord *p = arena0->allocate((size_t) size / BytesPerWord);
1854 return (jlong)p2i(p);
1855 WB_END
1856
1857 WB_ENTRY(void, WB_DeallocateToMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong p, jlong size))
1858 assert(is_aligned(size, BytesPerWord),
1859 "WB_DeallocateToMetaspaceTestArena: size is not a multiple of the system word byte size");
1860 metaspace::MetaspaceTestArena* arena0 = (metaspace::MetaspaceTestArena*) arena;
1861 arena0->deallocate((MetaWord*)p, (size_t) size / BytesPerWord);
1862 WB_END
1863
1864 WB_ENTRY(jlong, WB_GetMaxMetaspaceAllocationSize(JNIEnv* env, jobject wb))
1865 return (jlong) Metaspace::max_allocation_word_size() * BytesPerWord;
1866 WB_END
1867
1868 WB_ENTRY(jlong, WB_WordSize(JNIEnv* env))
1869 return (jlong)BytesPerWord;
1870 WB_END
1871
1872 WB_ENTRY(jlong, WB_RootChunkWordSize(JNIEnv* env))
1873 return (jlong)Metaspace::reserve_alignment_words();
1874 WB_END
1875
1876 WB_ENTRY(jboolean, WB_IsStaticallyLinked(JNIEnv* env, jobject wb))
1877 return JVM_IsStaticallyLinked();
1878 WB_END
1879
1880 //////////////
1881
1882 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1883 if (size < 0) {
1884 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1885 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1886 }
1887
1888 oop class_loader_oop = JNIHandles::resolve(class_loader);
1889 ClassLoaderData* cld = class_loader_oop != nullptr
1890 ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1891 : ClassLoaderData::the_null_class_loader_data();
1892
1893 void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1894
1895 return (jlong)(uintptr_t)metadata;
1896 WB_END
1897
1898 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1899 jstring version, jstring location, jobjectArray packages))
1900 Handle h_module (THREAD, JNIHandles::resolve(module));
1901 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1902 WB_END
1903
1904 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1905 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1906 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1907 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1908 WB_END
1909
1910 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1911 Handle h_module (THREAD, JNIHandles::resolve(module));
1912 Modules::add_module_exports_to_all_unnamed(h_module, package, CHECK);
1913 WB_END
1914
1915 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1916 Handle h_module (THREAD, JNIHandles::resolve(module));
1917 Modules::add_module_exports(h_module, package, Handle(), CHECK);
1918 WB_END
1919
1920 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1921 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1922 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1923 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1924 WB_END
1925
1926 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1927 if (inc < 0) {
1928 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1929 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1930 }
1931
1932 jlong max_size_t = (jlong) ((size_t) -1);
1933 if (inc > max_size_t) {
1934 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1935 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1936 }
1937
1938 size_t new_cap_until_GC = 0;
1939 size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1940 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1941 if (!success) {
1942 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1943 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1944 "due to contention with another thread");
1945 }
1946 return (jlong) new_cap_until_GC;
1947 WB_END
1948
1949 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1950 return (jlong) MetaspaceGC::capacity_until_GC();
1951 WB_END
1952
1953 // The function is only valid when CDS is available.
1954 WB_ENTRY(jlong, WB_AOTMetaspaceRegionAlignment(JNIEnv* env, jobject wb))
1955 #if INCLUDE_CDS
1956 return (jlong)AOTMetaspace::core_region_alignment();
1957 #else
1958 ShouldNotReachHere();
1959 return 0L;
1960 #endif
1961 WB_END
1962
1963 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1964 oop obj_oop = JNIHandles::resolve(obj);
1965 return (jboolean) obj_oop->mark().has_monitor();
1966 WB_END
1967
1968 WB_ENTRY(jboolean, WB_IsAsanEnabled(JNIEnv* env))
1969 return (jboolean) WhiteBox::is_asan_enabled();
1970 WB_END
1971
1972 WB_ENTRY(jboolean, WB_IsUbsanEnabled(JNIEnv* env))
1973 return (jboolean) WhiteBox::is_ubsan_enabled();
1974 WB_END
1975
1976 WB_ENTRY(jlong, WB_getInUseMonitorCount(JNIEnv* env, jobject wb))
1977 return (jlong) WhiteBox::get_in_use_monitor_count();
1978 WB_END
1979
1980 WB_ENTRY(jint, WB_getLockStackCapacity(JNIEnv* env))
1981 return (jint) LockStack::CAPACITY;
1982 WB_END
1983
1984 WB_ENTRY(jboolean, WB_supportsRecursiveFastLocking(JNIEnv* env))
1985 return (jboolean) VM_Version::supports_recursive_fast_locking();
1986 WB_END
1987
1988 WB_ENTRY(jboolean, WB_DeflateIdleMonitors(JNIEnv* env, jobject wb))
1989 log_info(monitorinflation)("WhiteBox initiated DeflateIdleMonitors");
1990 return ObjectSynchronizer::request_deflate_idle_monitors_from_wb();
1991 WB_END
1992
1993 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1994 VM_ForceSafepoint force_safepoint_op;
1995 VMThread::execute(&force_safepoint_op);
1996 WB_END
1997
1998 WB_ENTRY(void, WB_ForceClassLoaderStatsSafepoint(JNIEnv* env, jobject wb))
1999 nullStream dev_null;
2000 ClassLoaderStatsVMOperation force_op(&dev_null);
2001 VMThread::execute(&force_op);
2002 WB_END
2003
2004 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
2005 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2006 return (jlong) ik->constants();
2007 WB_END
2008
2009 WB_ENTRY(jobjectArray, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass klass))
2010 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2011 objArrayOop resolved_refs= ik->constants()->resolved_references();
2012 return (jobjectArray)JNIHandles::make_local(THREAD, resolved_refs);
2013 WB_END
2014
2015 WB_ENTRY(jint, WB_getFieldEntriesLength(JNIEnv* env, jobject wb, jclass klass))
2016 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2017 ConstantPool* cp = ik->constants();
2018 if (cp->cache() == nullptr) {
2019 return -1;
2020 }
2021 return cp->resolved_field_entries_length();
2022 WB_END
2023
2024 WB_ENTRY(jint, WB_getFieldCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2025 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2026 ConstantPool* cp = ik->constants();
2027 if (cp->cache() == nullptr) {
2028 return -1;
2029 }
2030 return cp->resolved_field_entry_at(index)->constant_pool_index();
2031 WB_END
2032
2033 WB_ENTRY(jint, WB_getMethodEntriesLength(JNIEnv* env, jobject wb, jclass klass))
2034 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2035 ConstantPool* cp = ik->constants();
2036 if (cp->cache() == nullptr) {
2037 return -1;
2038 }
2039 return cp->resolved_method_entries_length();
2040 WB_END
2041
2042 WB_ENTRY(jint, WB_getMethodCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2043 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2044 ConstantPool* cp = ik->constants();
2045 if (cp->cache() == nullptr) {
2046 return -1;
2047 }
2048 return cp->resolved_method_entry_at(index)->constant_pool_index();
2049 WB_END
2050
2051 WB_ENTRY(jint, WB_getIndyInfoLength(JNIEnv* env, jobject wb, jclass klass))
2052 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2053 ConstantPool* cp = ik->constants();
2054 if (cp->cache() == nullptr) {
2055 return -1;
2056 }
2057 return cp->resolved_indy_entries_length();
2058 WB_END
2059
2060 WB_ENTRY(jint, WB_getIndyCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2061 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2062 ConstantPool* cp = ik->constants();
2063 if (cp->cache() == nullptr) {
2064 return -1;
2065 }
2066 return cp->resolved_indy_entry_at(index)->constant_pool_index();
2067 WB_END
2068
2069 WB_ENTRY(jobject, WB_printClasses(JNIEnv* env, jobject wb, jstring class_name_pattern, jint flags))
2070 ThreadToNativeFromVM ttnfv(thread);
2071 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2072 ResourceMark rm;
2073 stringStream st;
2074 {
2075 ThreadInVMfromNative ttvfn(thread); // back to VM
2076 ClassPrinter::print_classes(c, flags, &st);
2077 }
2078 jstring result = env->NewStringUTF(st.freeze());
2079 CHECK_JNI_EXCEPTION_(env, nullptr);
2080 return result;
2081 WB_END
2082
2083 WB_ENTRY(jobject, WB_printMethods(JNIEnv* env, jobject wb, jstring class_name_pattern, jstring method_pattern, jint flags))
2084 ThreadToNativeFromVM ttnfv(thread);
2085 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2086 const char* m = env->GetStringUTFChars(method_pattern, nullptr);
2087 ResourceMark rm;
2088 stringStream st;
2089 {
2090 ThreadInVMfromNative ttvfn(thread); // back to VM
2091 ClassPrinter::print_methods(c, m, flags, &st);
2092 }
2093 jstring result = env->NewStringUTF(st.freeze());
2094 CHECK_JNI_EXCEPTION_(env, nullptr);
2095 return result;
2096 WB_END
2097
2098 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
2099 VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
2100 VMThread::execute(&clear_ics);
2101 WB_END
2102
2103 template <typename T>
2104 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
2105 assert(value != nullptr, "sanity");
2106 if (method == nullptr || name == nullptr) {
2107 return false;
2108 }
2109 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
2110 CHECK_JNI_EXCEPTION_(env, false);
2111 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
2112 // can't be in VM when we call JNI
2113 ThreadToNativeFromVM ttnfv(thread);
2114 const char* flag_name = env->GetStringUTFChars(name, nullptr);
2115 CHECK_JNI_EXCEPTION_(env, false);
2116 CompileCommandEnum option = CompilerOracle::string_to_option(flag_name);
2117 env->ReleaseStringUTFChars(name, flag_name);
2118 if (option == CompileCommandEnum::Unknown) {
2119 return false;
2120 }
2121 if (!CompilerOracle::option_matches_type(option, *value)) {
2122 return false;
2123 }
2124 return CompilerOracle::has_option_value(mh, option, *value);
2125 }
2126
2127 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2128 bool result;
2129 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
2130 // can't be in VM when we call JNI
2131 ThreadToNativeFromVM ttnfv(thread);
2132 return booleanBox(thread, env, result);
2133 }
2134 return nullptr;
2135 WB_END
2136
2137 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2138 intx result;
2139 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
2140 // can't be in VM when we call JNI
2141 ThreadToNativeFromVM ttnfv(thread);
2142 return longBox(thread, env, result);
2143 }
2144 return nullptr;
2145 WB_END
2146
2147 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2148 uintx result;
2149 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
2150 // can't be in VM when we call JNI
2151 ThreadToNativeFromVM ttnfv(thread);
2152 return longBox(thread, env, result);
2153 }
2154 return nullptr;
2155 WB_END
2156
2157 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2158 double result;
2159 if (GetMethodOption <double> (thread, env, method, name, &result)) {
2160 // can't be in VM when we call JNI
2161 ThreadToNativeFromVM ttnfv(thread);
2162 return doubleBox(thread, env, result);
2163 }
2164 return nullptr;
2165 WB_END
2166
2167 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2168 ccstr ccstrResult;
2169 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
2170 // can't be in VM when we call JNI
2171 ThreadToNativeFromVM ttnfv(thread);
2172 jstring result = env->NewStringUTF(ccstrResult);
2173 CHECK_JNI_EXCEPTION_(env, nullptr);
2174 return result;
2175 }
2176 return nullptr;
2177 WB_END
2178
2179 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
2180 const char* p = CDSConfig::default_archive_path();
2181 ThreadToNativeFromVM ttn(thread);
2182 jstring path_string = env->NewStringUTF(p);
2183
2184 CHECK_JNI_EXCEPTION_(env, nullptr);
2185
2186 return path_string;
2187 WB_END
2188
2189 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
2190 return CDSConfig::is_using_archive();
2191 WB_END
2192
2193 WB_ENTRY(jint, WB_GetCDSGenericHeaderMinVersion(JNIEnv* env, jobject wb))
2194 #if INCLUDE_CDS
2195 return (jint)CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION;
2196 #else
2197 ShouldNotReachHere();
2198 return (jint)-1;
2199 #endif
2200 WB_END
2201
2202 WB_ENTRY(jint, WB_GetCDSCurrentVersion(JNIEnv* env, jobject wb))
2203 #if INCLUDE_CDS
2204 return (jint)CURRENT_CDS_ARCHIVE_VERSION;
2205 #else
2206 ShouldNotReachHere();
2207 return (jint)-1;
2208 #endif
2209 WB_END
2210
2211 WB_ENTRY(jboolean, WB_CDSMemoryMappingFailed(JNIEnv* env, jobject wb))
2212 return FileMapInfo::memory_mapping_failed();
2213 WB_END
2214
2215 WB_ENTRY(jboolean, WB_IsSharedInternedString(JNIEnv* env, jobject wb, jobject str))
2216 if (!HeapShared::is_loading_mapping_mode()) {
2217 return false;
2218 }
2219 ResourceMark rm(THREAD);
2220 oop str_oop = JNIHandles::resolve(str);
2221 int length;
2222 jchar* chars = java_lang_String::as_unicode_string(str_oop, length, CHECK_(false));
2223 return StringTable::lookup_shared(chars, length) == str_oop;
2224 WB_END
2225
2226 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
2227 return (jboolean)AOTMetaspace::in_aot_cache(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2228 WB_END
2229
2230 WB_ENTRY(jboolean, WB_AreSharedStringsMapped(JNIEnv* env))
2231 return AOTMappedHeapLoader::is_mapped();
2232 WB_END
2233
2234 WB_ENTRY(void, WB_LinkClass(JNIEnv* env, jobject wb, jclass clazz))
2235 Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2236 if (!k->is_instance_klass()) {
2237 return;
2238 }
2239 InstanceKlass *ik = InstanceKlass::cast(k);
2240 ik->link_class(THREAD); // may throw verification error
2241 WB_END
2242
2243 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
2244 return AOTMappedHeapLoader::is_mapped();
2245 WB_END
2246
2247 WB_ENTRY(jboolean, WB_IsCDSIncluded(JNIEnv* env))
2248 #if INCLUDE_CDS
2249 // An exploded build inhibits use of CDS. Therefore, for the
2250 // purpose of testing, the JVM can be treated as not having CDS
2251 // built in at all.
2252 return ClassLoader::has_jrt_entry();
2253 #else
2254 return false;
2255 #endif // INCLUDE_CDS
2256 WB_END
2257
2258 WB_ENTRY(jboolean, WB_isC2OrJVMCIIncluded(JNIEnv* env))
2259 #if COMPILER2_OR_JVMCI
2260 return true;
2261 #else
2262 return false;
2263 #endif
2264 WB_END
2265
2266 WB_ENTRY(jboolean, WB_IsJVMCISupportedByGC(JNIEnv* env))
2267 #if INCLUDE_JVMCI
2268 return JVMCIGlobals::gc_supports_jvmci();
2269 #else
2270 return false;
2271 #endif
2272 WB_END
2273
2274 static bool canWriteJavaHeapArchive() {
2275 return !CDSConfig::are_vm_options_incompatible_with_dumping_heap();
2276 }
2277
2278 WB_ENTRY(jboolean, WB_CanWriteJavaHeapArchive(JNIEnv* env))
2279 return canWriteJavaHeapArchive();
2280 WB_END
2281
2282 WB_ENTRY(jboolean, WB_CanWriteMappedJavaHeapArchive(JNIEnv* env))
2283 return canWriteJavaHeapArchive() && !AOTStreamableObjects;
2284 WB_END
2285
2286 WB_ENTRY(jboolean, WB_CanWriteStreamedJavaHeapArchive(JNIEnv* env))
2287 return canWriteJavaHeapArchive() && AOTStreamableObjects;
2288 WB_END
2289
2290 WB_ENTRY(jboolean, WB_IsJFRIncluded(JNIEnv* env))
2291 #if INCLUDE_JFR
2292 return true;
2293 #else
2294 return false;
2295 #endif // INCLUDE_JFR
2296 WB_END
2297
2298 WB_ENTRY(jboolean, WB_IsDTraceIncluded(JNIEnv* env))
2299 #if defined(DTRACE_ENABLED)
2300 return true;
2301 #else
2302 return false;
2303 #endif // DTRACE_ENABLED
2304 WB_END
2305
2306 #if INCLUDE_CDS
2307
2308 WB_ENTRY(jint, WB_GetCDSOffsetForName(JNIEnv* env, jobject o, jstring name))
2309 ResourceMark rm;
2310 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2311 jint result = (jint)CDSConstants::get_cds_offset(c_name);
2312 return result;
2313 WB_END
2314
2315 WB_ENTRY(jint, WB_GetCDSConstantForName(JNIEnv* env, jobject o, jstring name))
2316 ResourceMark rm;
2317 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2318 jint result = (jint)CDSConstants::get_cds_constant(c_name);
2319 return result;
2320 WB_END
2321
2322 #endif // INCLUDE_CDS
2323
2324 WB_ENTRY(jboolean, WB_HandshakeReadMonitors(JNIEnv* env, jobject wb, jobject thread_handle))
2325 class ReadMonitorsHandshakeClosure : public HandshakeClosure {
2326 jboolean _executed;
2327
2328 void do_thread(Thread* th) {
2329 JavaThread* jt = JavaThread::cast(th);
2330 ResourceMark rm;
2331
2332 GrowableArray<MonitorInfo*>* info = new GrowableArray<MonitorInfo*>();
2333
2334 if (!jt->has_last_Java_frame()) {
2335 return;
2336 }
2337 RegisterMap rmap(jt,
2338 RegisterMap::UpdateMap::include,
2339 RegisterMap::ProcessFrames::include,
2340 RegisterMap::WalkContinuation::skip);
2341 for (javaVFrame* vf = jt->last_java_vframe(&rmap); vf != nullptr; vf = vf->java_sender()) {
2342 GrowableArray<MonitorInfo*> *monitors = vf->monitors();
2343 if (monitors != nullptr) {
2344 int len = monitors->length();
2345 // Walk monitors youngest to oldest
2346 for (int i = len - 1; i >= 0; i--) {
2347 MonitorInfo* mon_info = monitors->at(i);
2348 if (mon_info->eliminated()) continue;
2349 oop owner = mon_info->owner();
2350 if (owner != nullptr) {
2351 info->append(mon_info);
2352 }
2353 }
2354 }
2355 }
2356 _executed = true;
2357 }
2358
2359 public:
2360 ReadMonitorsHandshakeClosure() : HandshakeClosure("WB_HandshakeReadMonitors"), _executed(false) {}
2361 jboolean executed() const { return _executed; }
2362 };
2363
2364 ReadMonitorsHandshakeClosure rmhc;
2365 if (thread_handle != nullptr) {
2366 ThreadsListHandle tlh;
2367 JavaThread* target = nullptr;
2368 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2369 if (is_alive) {
2370 Handshake::execute(&rmhc, &tlh, target);
2371 }
2372 }
2373 return rmhc.executed();
2374 WB_END
2375
2376 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
2377 class TraceSelfHandshakeClosure : public HandshakeClosure {
2378 jint _num_threads_completed;
2379
2380 void do_thread(Thread* th) {
2381 JavaThread* jt = JavaThread::cast(th);
2382 ResourceMark rm;
2383
2384 jt->print_on(tty);
2385 jt->print_stack_on(tty);
2386 tty->cr();
2387 AtomicAccess::inc(&_num_threads_completed);
2388 }
2389
2390 public:
2391 TraceSelfHandshakeClosure(Thread* thread) : HandshakeClosure("WB_TraceSelf"), _num_threads_completed(0) {}
2392
2393 jint num_threads_completed() const { return _num_threads_completed; }
2394 };
2395 TraceSelfHandshakeClosure tshc(Thread::current());
2396
2397 if (all_threads) {
2398 Handshake::execute(&tshc);
2399 } else if (thread_handle != nullptr) {
2400 ThreadsListHandle tlh;
2401 JavaThread* target = nullptr;
2402 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2403 if (is_alive) {
2404 Handshake::execute(&tshc, &tlh, target);
2405 }
2406 }
2407 return tshc.num_threads_completed();
2408 WB_END
2409
2410 WB_ENTRY(void, WB_AsyncHandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle))
2411 class TraceSelfHandshakeClosure : public AsyncHandshakeClosure {
2412 JavaThread* _self;
2413 void do_thread(Thread* th) {
2414 assert(th->is_Java_thread(), "sanity");
2415 // AsynchHandshake handshakes are only executed by target.
2416 assert(_self == th, "Must be");
2417 assert(Thread::current() == th, "Must be");
2418 JavaThread* jt = JavaThread::cast(th);
2419 ResourceMark rm;
2420 jt->print_on(tty);
2421 jt->print_stack_on(tty);
2422 tty->cr();
2423 }
2424
2425 public:
2426 TraceSelfHandshakeClosure(JavaThread* self_target) : AsyncHandshakeClosure("WB_TraceSelf"), _self(self_target) {}
2427 };
2428 if (thread_handle != nullptr) {
2429 ThreadsListHandle tlh;
2430 JavaThread* target = nullptr;
2431 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2432 if (is_alive) {
2433 TraceSelfHandshakeClosure* tshc = new TraceSelfHandshakeClosure(target);
2434 Handshake::execute(tshc, target);
2435 }
2436 }
2437 WB_END
2438
2439 static volatile int _emulated_lock = 0;
2440
2441 WB_ENTRY(void, WB_LockAndBlock(JNIEnv* env, jobject wb, jboolean suspender))
2442 JavaThread* self = JavaThread::current();
2443
2444 {
2445 // Before trying to acquire the lock transition into a safepoint safe state.
2446 // Otherwise if either suspender or suspendee blocks for a safepoint
2447 // in ~ThreadBlockInVM the other one could loop forever trying to acquire
2448 // the lock without allowing the safepoint to progress.
2449 ThreadBlockInVM tbivm(self);
2450
2451 // We will deadlock here if we are 'suspender' and 'suspendee'
2452 // suspended in ~ThreadBlockInVM. This verifies we only suspend
2453 // at the right place.
2454 while (AtomicAccess::cmpxchg(&_emulated_lock, 0, 1) != 0) {}
2455 assert(_emulated_lock == 1, "Must be locked");
2456
2457 // Sleep much longer in suspendee to force situation where
2458 // 'suspender' is waiting above to acquire lock.
2459 os::naked_short_sleep(suspender ? 1 : 10);
2460 }
2461 AtomicAccess::store(&_emulated_lock, 0);
2462 WB_END
2463
2464 // Some convenience methods to deal with objects from java
2465 int WhiteBox::offset_for_field(const char* field_name, oop object,
2466 Symbol* signature_symbol) {
2467 assert(field_name != nullptr && strlen(field_name) > 0, "Field name not valid");
2468
2469 //Only non-array oops have fields. Don't call this function on arrays!
2470 InstanceKlass* ik = InstanceKlass::cast(object->klass());
2471
2472 //Create symbols to look for in the class
2473 TempNewSymbol name_symbol = SymbolTable::new_symbol(field_name);
2474
2475 //To be filled in with an offset of the field we're looking for
2476 fieldDescriptor fd;
2477
2478 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2479 if (res == nullptr) {
2480 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2481 name_symbol->as_C_string());
2482 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2483 }
2484
2485 //fetch the field at the offset we've found
2486 int dest_offset = fd.offset();
2487
2488 return dest_offset;
2489 }
2490
2491
2492 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2493 int offset = offset_for_field(field_name, object,
2494 vmSymbols::string_signature());
2495 oop string = object->obj_field(offset);
2496 if (string == nullptr) {
2497 return nullptr;
2498 }
2499 const char* ret = java_lang_String::as_utf8_string(string);
2500 return ret;
2501 }
2502
2503 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2504 int offset =
2505 offset_for_field(field_name, object, vmSymbols::bool_signature());
2506 bool ret = (object->bool_field(offset) == JNI_TRUE);
2507 return ret;
2508 }
2509
2510 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2511 ResourceMark rm;
2512 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(wbclass));
2513 const char* klass_name = klass->external_name();
2514
2515 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2516
2517 // one by one registration natives for exception catching
2518 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2519 CHECK_JNI_EXCEPTION(env);
2520 for (int i = 0, n = method_count; i < n; ++i) {
2521 // Skip dummy entries
2522 if (method_array[i].fnPtr == nullptr) continue;
2523 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2524 jthrowable throwable_obj = env->ExceptionOccurred();
2525 if (throwable_obj != nullptr) {
2526 env->ExceptionClear();
2527 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2528 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2529 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2530 tty->print_cr("Warning: 'NoSuchMethodError' on register of %s::%s%s",
2531 klass_name, method_array[i].name, method_array[i].signature);
2532 }
2533 } else {
2534 // Registration failed unexpectedly.
2535 tty->print_cr("Warning: unexpected error on register of %s::%s%s. All methods will be unregistered",
2536 klass_name, method_array[i].name, method_array[i].signature);
2537 env->UnregisterNatives(wbclass);
2538 break;
2539 }
2540 }
2541 }
2542 }
2543
2544 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2545 // can't be in VM when we call JNI
2546 ThreadToNativeFromVM ttnfv(thread);
2547 const char* dir = env->GetStringUTFChars(compDirect, nullptr);
2548 CHECK_JNI_EXCEPTION_(env, 0);
2549 int ret;
2550 {
2551 ThreadInVMfromNative ttvfn(thread); // back to VM
2552 ret = DirectivesParser::parse_string(dir, tty);
2553 }
2554 env->ReleaseStringUTFChars(compDirect, dir);
2555 // -1 for error parsing directive. Return 0 as number of directives added.
2556 if (ret == -1) {
2557 ret = 0;
2558 }
2559 return (jint) ret;
2560 WB_END
2561
2562 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2563 DirectivesStack::pop(count);
2564 WB_END
2565
2566 // Checks that the library libfile has the noexecstack bit set.
2567 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2568 jboolean ret = false;
2569 #ifdef LINUX
2570 // Can't be in VM when we call JNI.
2571 ThreadToNativeFromVM ttnfv(thread);
2572 const char* lf = env->GetStringUTFChars(libfile, nullptr);
2573 CHECK_JNI_EXCEPTION_(env, 0);
2574 ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2575 env->ReleaseStringUTFChars(libfile, lf);
2576 #endif
2577 return ret;
2578 WB_END
2579
2580 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2581 LINUX_ONLY(return OSContainer::is_containerized();)
2582 return false;
2583 WB_END
2584
2585 // Physical memory of the host machine (including containers)
2586 WB_ENTRY(jlong, WB_HostPhysicalMemory(JNIEnv* env, jobject o))
2587 LINUX_ONLY(return static_cast<jlong>(os::Linux::physical_memory());)
2588 return static_cast<jlong>(os::physical_memory());
2589 WB_END
2590
2591 // Available memory of the host machine (container-aware)
2592 WB_ENTRY(jlong, WB_HostAvailableMemory(JNIEnv* env, jobject o))
2593 physical_memory_size_type avail_mem = 0;
2594 // Return value ignored - defaulting to 0 on failure.
2595 (void)os::available_memory(avail_mem);
2596 return static_cast<jlong>(avail_mem);
2597 WB_END
2598
2599 // Physical swap of the host machine (including containers), Linux only.
2600 WB_ENTRY(jlong, WB_HostPhysicalSwap(JNIEnv* env, jobject o))
2601 #ifdef LINUX
2602 physical_memory_size_type swap_val = 0;
2603 if (!os::Linux::host_swap(swap_val)) {
2604 return -1; // treat as unlimited
2605 }
2606 return static_cast<jlong>(swap_val);
2607 #endif
2608 return -1; // Not used/implemented on other platforms
2609 WB_END
2610
2611 WB_ENTRY(jint, WB_ValidateCgroup(JNIEnv* env,
2612 jobject o,
2613 jboolean cgroups_v2_enabled,
2614 jstring controllers_file,
2615 jstring proc_self_cgroup,
2616 jstring proc_self_mountinfo))
2617 jint ret = 0;
2618 #ifdef LINUX
2619 ThreadToNativeFromVM ttnfv(thread);
2620 const char* c_file = env->GetStringUTFChars(controllers_file, nullptr);
2621 CHECK_JNI_EXCEPTION_(env, 0);
2622 const char* p_s_cgroup = env->GetStringUTFChars(proc_self_cgroup, nullptr);
2623 CHECK_JNI_EXCEPTION_(env, 0);
2624 const char* p_s_mountinfo = env->GetStringUTFChars(proc_self_mountinfo, nullptr);
2625 CHECK_JNI_EXCEPTION_(env, 0);
2626 u1 cg_type_flags = 0;
2627 // This sets cg_type_flags
2628 WhiteBox::validate_cgroup(cgroups_v2_enabled, c_file, p_s_cgroup, p_s_mountinfo, &cg_type_flags);
2629 ret = (jint)cg_type_flags;
2630 env->ReleaseStringUTFChars(controllers_file, c_file);
2631 env->ReleaseStringUTFChars(proc_self_cgroup, p_s_cgroup);
2632 env->ReleaseStringUTFChars(proc_self_mountinfo, p_s_mountinfo);
2633 #endif
2634 return ret;
2635 WB_END
2636
2637 // Available cpus of the host machine, Linux only.
2638 // Used in container testing.
2639 WB_ENTRY(jint, WB_HostCPUs(JNIEnv* env, jobject o))
2640 LINUX_ONLY(return os::Linux::active_processor_count();)
2641 return -1; // Not used/implemented on other platforms
2642 WB_END
2643
2644 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2645 os::print_os_info(tty);
2646 WB_END
2647
2648 // Elf decoder
2649 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2650 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2651 ElfFile::_do_not_cache_elf_section = true;
2652 #endif
2653 WB_END
2654
2655 WB_ENTRY(jlong, WB_ResolvedMethodItemsCount(JNIEnv* env, jobject o))
2656 return (jlong) ResolvedMethodTable::items_count();
2657 WB_END
2658
2659 WB_ENTRY(jint, WB_GetKlassMetadataSize(JNIEnv* env, jobject wb, jclass mirror))
2660 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(mirror));
2661 // Return size in bytes.
2662 return k->size() * wordSize;
2663 WB_END
2664
2665 // See test/hotspot/jtreg/runtime/Thread/ThreadObjAccessAtExit.java.
2666 // It explains how the thread's priority field is used for test state coordination.
2667 //
2668 WB_ENTRY(void, WB_CheckThreadObjOfTerminatingThread(JNIEnv* env, jobject wb, jobject target_handle))
2669 oop target_oop = JNIHandles::resolve_non_null(target_handle);
2670 jlong tid = java_lang_Thread::thread_id(target_oop);
2671 JavaThread* target = java_lang_Thread::thread(target_oop);
2672
2673 // Grab a ThreadsListHandle to protect the target thread whilst terminating
2674 ThreadsListHandle tlh;
2675
2676 // Look up the target thread by tid to ensure it is present
2677 JavaThread* t = tlh.list()->find_JavaThread_from_java_tid(tid);
2678 if (t == nullptr) {
2679 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread not found in ThreadsList!");
2680 }
2681
2682 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is protected");
2683 // Allow target to terminate by boosting priority
2684 java_lang_Thread::set_priority(t->threadObj(), ThreadPriority(NormPriority + 1));
2685
2686 // Now wait for the target to terminate
2687 while (!target->is_terminated()) {
2688 ThreadBlockInVM tbivm(thread); // just in case target is involved in a safepoint
2689 os::naked_short_sleep(0);
2690 }
2691
2692 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is terminated");
2693
2694 // Now release the GC inducing thread - we have to re-resolve the external oop that
2695 // was passed in as GC may have occurred and we don't know if we can trust t->threadObj() now.
2696 oop original = JNIHandles::resolve_non_null(target_handle);
2697 java_lang_Thread::set_priority(original, ThreadPriority(NormPriority + 2));
2698
2699 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: GC has been initiated - checking threadObj:");
2700
2701 // The Java code should be creating garbage and triggering GC, which would potentially move
2702 // the threadObj oop. If the exiting thread is properly protected then its threadObj should
2703 // remain valid and equal to our initial target_handle. Loop a few times to give GC a chance to
2704 // kick in.
2705 for (int i = 0; i < 5; i++) {
2706 oop original = JNIHandles::resolve_non_null(target_handle);
2707 oop current = t->threadObj();
2708 if (original != current) {
2709 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: failed comparison on iteration %d", i);
2710 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread oop has changed!");
2711 } else {
2712 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: successful comparison on iteration %d", i);
2713 ThreadBlockInVM tbivm(thread);
2714 os::naked_short_sleep(50);
2715 }
2716 }
2717 WB_END
2718
2719 WB_ENTRY(void, WB_VerifyFrames(JNIEnv* env, jobject wb, jboolean log, jboolean update_map))
2720 ResourceMark rm; // for verify
2721 stringStream st;
2722 for (StackFrameStream fst(JavaThread::current(), update_map, true); !fst.is_done(); fst.next()) {
2723 frame* current_frame = fst.current();
2724 if (log) {
2725 current_frame->print_value_on(&st);
2726 }
2727 current_frame->verify(fst.register_map());
2728 }
2729 if (log) {
2730 tty->print_cr("[WhiteBox::VerifyFrames] Walking Frames");
2731 tty->print_raw(st.freeze());
2732 tty->print_cr("[WhiteBox::VerifyFrames] Done");
2733 }
2734 WB_END
2735
2736 WB_ENTRY(jboolean, WB_IsJVMTIIncluded(JNIEnv* env, jobject wb))
2737 #if INCLUDE_JVMTI
2738 return JNI_TRUE;
2739 #else
2740 return JNI_FALSE;
2741 #endif
2742 WB_END
2743
2744 WB_ENTRY(void, WB_WaitUnsafe(JNIEnv* env, jobject wb, jint time))
2745 os::naked_short_sleep(time);
2746 WB_END
2747
2748 WB_ENTRY(void, WB_BusyWaitCPUTime(JNIEnv* env, jobject wb, jint time))
2749 ThreadToNativeFromVM ttn(thread);
2750 u8 start = os::current_thread_cpu_time();
2751 u8 target_duration = time * (u8)1000000;
2752 while (os::current_thread_cpu_time() - start < target_duration) {
2753 for (volatile int i = 0; i < 1000000; i++);
2754 }
2755 WB_END
2756
2757 WB_ENTRY(jboolean, WB_CPUSamplerSetOutOfStackWalking(JNIEnv* env, jobject wb, jboolean enable))
2758 #if defined(ASSERT) && INCLUDE_JFR && defined(LINUX)
2759 return JfrCPUTimeThreadSampling::set_out_of_stack_walking_enabled(enable == JNI_TRUE) ? JNI_TRUE : JNI_FALSE;
2760 #else
2761 return JNI_FALSE;
2762 #endif
2763 WB_END
2764
2765 WB_ENTRY(jstring, WB_GetLibcName(JNIEnv* env, jobject o))
2766 ThreadToNativeFromVM ttn(thread);
2767 jstring info_string = env->NewStringUTF(XSTR(LIBC));
2768 CHECK_JNI_EXCEPTION_(env, nullptr);
2769 return info_string;
2770 WB_END
2771
2772 WB_ENTRY(void, WB_PinObject(JNIEnv* env, jobject wb, jobject o))
2773 #if INCLUDE_G1GC
2774 if (!UseG1GC) {
2775 ShouldNotReachHere();
2776 return;
2777 }
2778 oop obj = JNIHandles::resolve(o);
2779 G1CollectedHeap::heap()->pin_object(thread, obj);
2780 #else
2781 ShouldNotReachHere();
2782 #endif // INCLUDE_G1GC
2783 WB_END
2784
2785 WB_ENTRY(void, WB_UnpinObject(JNIEnv* env, jobject wb, jobject o))
2786 #if INCLUDE_G1GC
2787 if (!UseG1GC) {
2788 ShouldNotReachHere();
2789 return;
2790 }
2791 oop obj = JNIHandles::resolve(o);
2792 G1CollectedHeap::heap()->unpin_object(thread, obj);
2793 #else
2794 ShouldNotReachHere();
2795 #endif // INCLUDE_G1GC
2796 WB_END
2797
2798 WB_ENTRY(jboolean, WB_SetVirtualThreadsNotifyJvmtiMode(JNIEnv* env, jobject wb, jboolean enable))
2799 if (!Continuations::enabled()) {
2800 tty->print_cr("WB error: must be Continuations::enabled()!");
2801 return JNI_FALSE;
2802 }
2803 jboolean result = false;
2804 #if INCLUDE_JVMTI
2805 if (enable) {
2806 result = JvmtiEnvBase::enable_virtual_threads_notify_jvmti();
2807 } else {
2808 result = JvmtiEnvBase::disable_virtual_threads_notify_jvmti();
2809 }
2810 #endif
2811 return result;
2812 WB_END
2813
2814 WB_ENTRY(void, WB_PreTouchMemory(JNIEnv* env, jobject wb, jlong addr, jlong size))
2815 void* const from = (void*)addr;
2816 void* const to = (void*)(addr + size);
2817 if (from > to) {
2818 os::pretouch_memory(from, to, os::vm_page_size());
2819 }
2820 WB_END
2821
2822 WB_ENTRY(void, WB_CleanMetaspaces(JNIEnv* env, jobject target))
2823 ClassLoaderDataGraph::safepoint_and_clean_metaspaces();
2824 WB_END
2825
2826 // Reports resident set size (RSS) in bytes
2827 WB_ENTRY(jlong, WB_Rss(JNIEnv* env, jobject o))
2828 return os::rss();
2829 WB_END
2830
2831 WB_ENTRY(void, WB_ControlledCrash(JNIEnv* env, jobject o, jint how))
2832 #ifdef ASSERT
2833 VMError::controlled_crash(how);
2834 #else
2835 THROW_MSG(vmSymbols::java_lang_UnsupportedOperationException(), "Only available in debug builds");
2836 #endif
2837 WB_END
2838
2839 #define CC (char*)
2840
2841 static JNINativeMethod methods[] = {
2842 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
2843 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
2844 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
2845 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
2846 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
2847 {CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
2848 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
2849 {CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
2850 {CC"getHeapAlignment", CC"()J", (void*)&WB_GetHeapAlignment},
2851 {CC"shipsFullDebugInfo", CC"()Z", (void*)&WB_ShipDebugInfoFull},
2852 {CC"shipsPublicDebugInfo", CC"()Z", (void*)&WB_ShipDebugInfoPublic},
2853 {CC"countAliveClasses0", CC"(Ljava/lang/String;)I", (void*)&WB_CountAliveClasses },
2854 {CC"getSymbolRefcount", CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2855 {CC"parseCommandLine0",
2856 CC"(Ljava/lang/String;C[Ljdk/test/whitebox/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2857 (void*) &WB_ParseCommandLine
2858 },
2859 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2860 (void*)&WB_AddToBootstrapClassLoaderSearch},
2861 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2862 (void*)&WB_AddToSystemClassLoaderSearch},
2863 {CC"getCompressedOopsMaxHeapSize", CC"()J",
2864 (void*)&WB_GetCompressedOopsMaxHeapSize},
2865 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
2866 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
2867 {CC"decodeNKlassAndAccessKlass",CC"(I)V", (void*)&WB_DecodeNKlassAndAccessKlass},
2868 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
2869 #if INCLUDE_CDS
2870 {CC"getCDSOffsetForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSOffsetForName},
2871 {CC"getCDSConstantForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSConstantForName},
2872 #endif
2873 #if INCLUDE_G1GC
2874 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
2875 {CC"g1CompletedConcurrentMarkCycles", CC"()I", (void*)&WB_G1CompletedConcurrentMarkCycles},
2876 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
2877 {CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
2878 {CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
2879 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
2880 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
2881 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
2882 {CC"g1HasRegionsToUncommit", CC"()Z", (void*)&WB_G1HasRegionsToUncommit},
2883 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2884 (void*)&WB_G1AuxiliaryMemoryUsage },
2885 {CC"g1ActiveMemoryNodeCount", CC"()I", (void*)&WB_G1ActiveMemoryNodeCount },
2886 {CC"g1MemoryNodeIds", CC"()[I", (void*)&WB_G1MemoryNodeIds },
2887 {CC"g1GetMixedGCInfo", CC"(I)[J", (void*)&WB_G1GetMixedGCInfo },
2888 #endif // INCLUDE_G1GC
2889 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
2890 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
2891 {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J", (void*)&WB_NMTMallocWithPseudoStackAndType},
2892 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
2893 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
2894 {CC"NMTAttemptReserveMemoryAt", CC"(JJ)J", (void*)&WB_NMTAttemptReserveMemoryAt },
2895 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
2896 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
2897 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
2898 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
2899 {CC"NMTNewArena", CC"(J)J", (void*)&WB_NMTNewArena },
2900 {CC"NMTFreeArena", CC"(J)V", (void*)&WB_NMTFreeArena },
2901 {CC"NMTArenaMalloc", CC"(JJ)V", (void*)&WB_NMTArenaMalloc },
2902 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
2903 {CC"isFrameDeoptimized", CC"(I)Z", (void*)&WB_IsFrameDeoptimized},
2904 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
2905 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
2906 (void*)&WB_DeoptimizeMethod },
2907 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
2908 (void*)&WB_IsMethodCompiled },
2909 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
2910 (void*)&WB_IsMethodCompilable},
2911 {CC"isMethodQueuedForCompilation0",
2912 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
2913 {CC"isIntrinsicAvailable0",
2914 CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
2915 (void*)&WB_IsIntrinsicAvailable},
2916 {CC"makeMethodNotCompilable0",
2917 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
2918 {CC"testSetDontInlineMethod0",
2919 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
2920 {CC"getMethodCompilationLevel0",
2921 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
2922 {CC"getMethodDecompileCount0",
2923 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodDecompileCount},
2924 {CC"getMethodTrapCount0",
2925 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2926 (void*)&WB_GetMethodTrapCount},
2927 {CC"getDeoptCount0",
2928 CC"(Ljava/lang/String;Ljava/lang/String;)I", (void*)&WB_GetDeoptCount},
2929 {CC"getMethodEntryBci0",
2930 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
2931 {CC"getCompileQueueSize",
2932 CC"(I)I", (void*)&WB_GetCompileQueueSize},
2933 {CC"testSetForceInlineMethod0",
2934 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
2935 {CC"enqueueMethodForCompilation0",
2936 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
2937 {CC"enqueueInitializerForCompilation0",
2938 CC"(Ljava/lang/Class;I)Z", (void*)&WB_EnqueueInitializerForCompilation},
2939 {CC"markMethodProfiled",
2940 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_MarkMethodProfiled},
2941 {CC"clearMethodState0",
2942 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
2943 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
2944 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
2945 {CC"matchesMethod",
2946 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2947 (void*)&WB_MatchesMethod},
2948 {CC"matchesInline",
2949 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2950 (void*)&WB_MatchesInline},
2951 {CC"shouldPrintAssembly",
2952 CC"(Ljava/lang/reflect/Executable;I)Z",
2953 (void*)&WB_ShouldPrintAssembly},
2954
2955 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
2956 {CC"isDefaultVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsDefaultVMFlag},
2957 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
2958 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
2959 {CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
2960 {CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
2961 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
2962 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
2963 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
2964 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
2965 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
2966 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
2967 (void*)&WB_SetStringVMFlag},
2968 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
2969 (void*)&WB_GetBooleanVMFlag},
2970 {CC"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2971 (void*)&WB_GetIntVMFlag},
2972 {CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2973 (void*)&WB_GetUintVMFlag},
2974 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2975 (void*)&WB_GetIntxVMFlag},
2976 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2977 (void*)&WB_GetUintxVMFlag},
2978 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2979 (void*)&WB_GetUint64VMFlag},
2980 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
2981 (void*)&WB_GetSizeTVMFlag},
2982 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
2983 (void*)&WB_GetDoubleVMFlag},
2984 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
2985 (void*)&WB_GetStringVMFlag},
2986 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
2987 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
2988 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
2989 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
2990 {CC"allocateMetaspace",
2991 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
2992 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
2993 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
2994 {CC"metaspaceSharedRegionAlignment", CC"()J", (void*)&WB_AOTMetaspaceRegionAlignment },
2995 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
2996 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
2997 (void*)&WB_GetNMethod },
2998 {CC"relocateNMethodFromMethod0", CC"(Ljava/lang/reflect/Executable;I)V",
2999 (void*)&WB_RelocateNMethodFromMethod },
3000 {CC"relocateNMethodFromAddr", CC"(JI)V", (void*)&WB_RelocateNMethodFromAddr },
3001 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
3002 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
3003 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
3004 {CC"getCompilationActivityMode",
3005 CC"()I", (void*)&WB_GetCompilationActivityMode},
3006 {CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
3007 (void*)&WB_GetMethodData },
3008 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
3009 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
3010 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
3011 {CC"DefineModule", CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
3012 (void*)&WB_DefineModule },
3013 {CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
3014 (void*)&WB_AddModuleExports },
3015 {CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
3016 (void*)&WB_AddReadsModule },
3017 {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
3018 (void*)&WB_AddModuleExportsToAllUnnamed },
3019 {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
3020 (void*)&WB_AddModuleExportsToAll },
3021 {CC"deflateIdleMonitors", CC"()Z", (void*)&WB_DeflateIdleMonitors },
3022 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
3023 {CC"isAsanEnabled", CC"()Z", (void*)&WB_IsAsanEnabled },
3024 {CC"isUbsanEnabled", CC"()Z", (void*)&WB_IsUbsanEnabled },
3025 {CC"getInUseMonitorCount", CC"()J", (void*)&WB_getInUseMonitorCount },
3026 {CC"getLockStackCapacity", CC"()I", (void*)&WB_getLockStackCapacity },
3027 {CC"supportsRecursiveFastLocking", CC"()Z", (void*)&WB_supportsRecursiveFastLocking },
3028 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
3029 {CC"forceClassLoaderStatsSafepoint", CC"()V", (void*)&WB_ForceClassLoaderStatsSafepoint },
3030 {CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
3031 {CC"getResolvedReferences0", CC"(Ljava/lang/Class;)[Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
3032 {CC"getFieldEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getFieldEntriesLength},
3033 {CC"getFieldCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getFieldCPIndex},
3034 {CC"getMethodEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getMethodEntriesLength},
3035 {CC"getMethodCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getMethodCPIndex},
3036 {CC"getIndyInfoLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getIndyInfoLength},
3037 {CC"getIndyCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getIndyCPIndex},
3038 {CC"printClasses0", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printClasses},
3039 {CC"printMethods0", CC"(Ljava/lang/String;Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printMethods},
3040 {CC"getMethodBooleanOption",
3041 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
3042 (void*)&WB_GetMethodBooleaneOption},
3043 {CC"getMethodIntxOption",
3044 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
3045 (void*)&WB_GetMethodIntxOption},
3046 {CC"getMethodUintxOption",
3047 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
3048 (void*)&WB_GetMethodUintxOption},
3049 {CC"getMethodDoubleOption",
3050 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
3051 (void*)&WB_GetMethodDoubleOption},
3052 {CC"getMethodStringOption",
3053 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
3054 (void*)&WB_GetMethodStringOption},
3055 {CC"getDefaultArchivePath", CC"()Ljava/lang/String;",
3056 (void*)&WB_GetDefaultArchivePath},
3057 {CC"getCDSGenericHeaderMinVersion", CC"()I", (void*)&WB_GetCDSGenericHeaderMinVersion},
3058 {CC"getCurrentCDSVersion", CC"()I", (void*)&WB_GetCDSCurrentVersion},
3059 {CC"isSharingEnabled", CC"()Z", (void*)&WB_IsSharingEnabled},
3060 {CC"isSharedInternedString", CC"(Ljava/lang/String;)Z", (void*)&WB_IsSharedInternedString },
3061 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
3062 {CC"areSharedStringsMapped", CC"()Z", (void*)&WB_AreSharedStringsMapped },
3063 {CC"linkClass", CC"(Ljava/lang/Class;)V", (void*)&WB_LinkClass},
3064 {CC"areOpenArchiveHeapObjectsMapped", CC"()Z", (void*)&WB_AreOpenArchiveHeapObjectsMapped},
3065 {CC"isCDSIncluded", CC"()Z", (void*)&WB_IsCDSIncluded },
3066 {CC"isJFRIncluded", CC"()Z", (void*)&WB_IsJFRIncluded },
3067 {CC"isDTraceIncluded", CC"()Z", (void*)&WB_IsDTraceIncluded },
3068 {CC"hasLibgraal", CC"()Z", (void*)&WB_HasLibgraal },
3069 {CC"isC2OrJVMCIIncluded", CC"()Z", (void*)&WB_isC2OrJVMCIIncluded },
3070 {CC"isJVMCISupportedByGC", CC"()Z", (void*)&WB_IsJVMCISupportedByGC},
3071 {CC"canWriteJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteJavaHeapArchive },
3072 {CC"canWriteMappedJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteMappedJavaHeapArchive },
3073 {CC"canWriteStreamedJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteStreamedJavaHeapArchive },
3074 {CC"cdsMemoryMappingFailed", CC"()Z", (void*)&WB_CDSMemoryMappingFailed },
3075
3076 {CC"clearInlineCaches0", CC"(Z)V", (void*)&WB_ClearInlineCaches },
3077 {CC"handshakeReadMonitors", CC"(Ljava/lang/Thread;)Z", (void*)&WB_HandshakeReadMonitors },
3078 {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
3079 {CC"asyncHandshakeWalkStack", CC"(Ljava/lang/Thread;)V", (void*)&WB_AsyncHandshakeWalkStack },
3080 {CC"lockAndBlock", CC"(Z)V", (void*)&WB_LockAndBlock},
3081 {CC"checkThreadObjOfTerminatingThread", CC"(Ljava/lang/Thread;)V", (void*)&WB_CheckThreadObjOfTerminatingThread },
3082 {CC"verifyFrames", CC"(ZZ)V", (void*)&WB_VerifyFrames },
3083 {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
3084 (void*)&WB_AddCompilerDirective },
3085 {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
3086 {CC"isGCSupported", CC"(I)Z", (void*)&WB_IsGCSupported},
3087 {CC"isGCSupportedByJVMCICompiler", CC"(I)Z", (void*)&WB_IsGCSupportedByJVMCICompiler},
3088 {CC"isGCSelected", CC"(I)Z", (void*)&WB_IsGCSelected},
3089 {CC"isGCSelectedErgonomically", CC"()Z", (void*)&WB_IsGCSelectedErgonomically},
3090 {CC"supportsConcurrentGCBreakpoints", CC"()Z", (void*)&WB_SupportsConcurrentGCBreakpoints},
3091 {CC"concurrentGCAcquireControl0", CC"()V", (void*)&WB_ConcurrentGCAcquireControl},
3092 {CC"concurrentGCReleaseControl0", CC"()V", (void*)&WB_ConcurrentGCReleaseControl},
3093 {CC"concurrentGCRunToIdle0", CC"()V", (void*)&WB_ConcurrentGCRunToIdle},
3094 {CC"concurrentGCRunTo0", CC"(Ljava/lang/String;)Z",
3095 (void*)&WB_ConcurrentGCRunTo},
3096 {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
3097 (void*)&WB_CheckLibSpecifiesNoexecstack},
3098 {CC"isContainerized", CC"()Z", (void*)&WB_IsContainerized },
3099 {CC"validateCgroup",
3100 CC"(ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
3101 (void*)&WB_ValidateCgroup },
3102 {CC"hostPhysicalMemory", CC"()J", (void*)&WB_HostPhysicalMemory },
3103 {CC"hostPhysicalSwap", CC"()J", (void*)&WB_HostPhysicalSwap },
3104 {CC"hostAvailableMemory", CC"()J", (void*)&WB_HostAvailableMemory },
3105 {CC"hostCPUs", CC"()I", (void*)&WB_HostCPUs },
3106 {CC"printOsInfo", CC"()V", (void*)&WB_PrintOsInfo },
3107 {CC"disableElfSectionCache", CC"()V", (void*)&WB_DisableElfSectionCache },
3108 {CC"resolvedMethodItemsCount", CC"()J", (void*)&WB_ResolvedMethodItemsCount },
3109 {CC"getKlassMetadataSize", CC"(Ljava/lang/Class;)I",(void*)&WB_GetKlassMetadataSize},
3110
3111 {CC"createMetaspaceTestContext", CC"(JJ)J", (void*)&WB_CreateMetaspaceTestContext},
3112 {CC"destroyMetaspaceTestContext", CC"(J)V", (void*)&WB_DestroyMetaspaceTestContext},
3113 {CC"purgeMetaspaceTestContext", CC"(J)V", (void*)&WB_PurgeMetaspaceTestContext},
3114 {CC"printMetaspaceTestContext", CC"(J)V", (void*)&WB_PrintMetaspaceTestContext},
3115 {CC"getTotalCommittedBytesInMetaspaceTestContext", CC"(J)J",(void*)&WB_GetTotalCommittedBytesInMetaspaceTestContext},
3116 {CC"getTotalUsedBytesInMetaspaceTestContext", CC"(J)J", (void*)&WB_GetTotalUsedBytesInMetaspaceTestContext},
3117 {CC"createArenaInTestContext", CC"(JZ)J", (void*)&WB_CreateArenaInTestContext},
3118 {CC"destroyMetaspaceTestArena", CC"(J)V", (void*)&WB_DestroyMetaspaceTestArena},
3119 {CC"allocateFromMetaspaceTestArena", CC"(JJ)J", (void*)&WB_AllocateFromMetaspaceTestArena},
3120 {CC"deallocateToMetaspaceTestArena", CC"(JJJ)V", (void*)&WB_DeallocateToMetaspaceTestArena},
3121 {CC"maxMetaspaceAllocationSize", CC"()J", (void*)&WB_GetMaxMetaspaceAllocationSize},
3122
3123 {CC"isJVMTIIncluded", CC"()Z", (void*)&WB_IsJVMTIIncluded},
3124 {CC"waitUnsafe", CC"(I)V", (void*)&WB_WaitUnsafe},
3125 {CC"busyWaitCPUTime", CC"(I)V", (void*)&WB_BusyWaitCPUTime},
3126 {CC"cpuSamplerSetOutOfStackWalking", CC"(Z)Z", (void*)&WB_CPUSamplerSetOutOfStackWalking},
3127 {CC"getLibcName", CC"()Ljava/lang/String;", (void*)&WB_GetLibcName},
3128
3129 {CC"pinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_PinObject},
3130 {CC"unpinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_UnpinObject},
3131 {CC"setVirtualThreadsNotifyJvmtiMode", CC"(Z)Z", (void*)&WB_SetVirtualThreadsNotifyJvmtiMode},
3132 {CC"preTouchMemory", CC"(JJ)V", (void*)&WB_PreTouchMemory},
3133 {CC"cleanMetaspaces", CC"()V", (void*)&WB_CleanMetaspaces},
3134 {CC"rss", CC"()J", (void*)&WB_Rss},
3135 {CC"printString", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_PrintString},
3136 {CC"lockAndStuckInSafepoint", CC"()V", (void*)&WB_TakeLockAndHangInSafepoint},
3137 {CC"wordSize", CC"()J", (void*)&WB_WordSize},
3138 {CC"rootChunkWordSize", CC"()J", (void*)&WB_RootChunkWordSize},
3139 {CC"isStatic", CC"()Z", (void*)&WB_IsStaticallyLinked},
3140 {CC"controlledCrash",CC"(I)V", (void*)&WB_ControlledCrash},
3141 };
3142
3143 #undef CC
3144
3145 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
3146 {
3147 if (WhiteBoxAPI) {
3148 // Make sure that wbclass is loaded by the null classloader
3149 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(wbclass));
3150 Handle loader(THREAD, ik->class_loader());
3151 if (loader.is_null()) {
3152 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
3153 WhiteBox::set_used();
3154 }
3155 }
3156 }
3157 JVM_END