1 /*
2 * Copyright (c) 2012, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds.h"
26 #include "cds/aotMetaspace.hpp"
27 #include "cds/archiveHeapLoader.hpp"
28 #include "cds/cdsConstants.hpp"
29 #include "cds/filemap.hpp"
30 #include "cds/heapShared.hpp"
31 #include "classfile/classLoader.hpp"
32 #include "classfile/classLoaderDataGraph.hpp"
33 #include "classfile/classLoaderStats.hpp"
34 #include "classfile/classPrinter.hpp"
35 #include "classfile/javaClasses.inline.hpp"
36 #include "classfile/modules.hpp"
37 #include "classfile/stringTable.hpp"
38 #include "classfile/symbolTable.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/codeCache.hpp"
42 #include "code/compiledIC.hpp"
43 #include "compiler/compilationPolicy.hpp"
44 #include "compiler/compilerOracle.hpp"
45 #include "compiler/directivesParser.hpp"
46 #include "compiler/methodMatcher.hpp"
47 #include "gc/shared/concurrentGCBreakpoints.hpp"
48 #include "gc/shared/gcConfig.hpp"
49 #include "gc/shared/genArguments.hpp"
50 #include "jfr/periodic/sampling/jfrCPUTimeThreadSampler.hpp"
51 #include "jvm.h"
52 #include "jvmtifiles/jvmtiEnv.hpp"
53 #include "logging/log.hpp"
54 #include "memory/iterator.hpp"
55 #include "memory/iterator.inline.hpp"
56 #include "memory/memoryReserver.hpp"
57 #include "memory/metadataFactory.hpp"
58 #include "memory/metaspace/testHelpers.hpp"
59 #include "memory/metaspaceUtils.hpp"
60 #include "memory/oopFactory.hpp"
61 #include "memory/resourceArea.hpp"
62 #include "memory/universe.hpp"
63 #include "nmt/mallocSiteTable.hpp"
64 #include "oops/access.hpp"
65 #include "oops/array.hpp"
66 #include "oops/compressedOops.hpp"
67 #include "oops/compressedOops.inline.hpp"
68 #include "oops/constantPool.inline.hpp"
69 #include "oops/klass.inline.hpp"
70 #include "oops/method.inline.hpp"
71 #include "oops/methodData.inline.hpp"
72 #include "oops/objArrayKlass.hpp"
73 #include "oops/objArrayOop.inline.hpp"
74 #include "oops/oop.inline.hpp"
75 #include "oops/typeArrayOop.inline.hpp"
76 #include "prims/jvmtiEnvBase.hpp"
77 #include "prims/resolvedMethodTable.hpp"
78 #include "prims/wbtestmethods/parserTests.hpp"
79 #include "prims/whitebox.inline.hpp"
80 #include "runtime/arguments.hpp"
81 #include "runtime/atomicAccess.hpp"
82 #include "runtime/deoptimization.hpp"
83 #include "runtime/fieldDescriptor.inline.hpp"
84 #include "runtime/flags/jvmFlag.hpp"
85 #include "runtime/flags/jvmFlagAccess.hpp"
86 #include "runtime/frame.inline.hpp"
87 #include "runtime/handles.inline.hpp"
88 #include "runtime/handshake.hpp"
89 #include "runtime/interfaceSupport.inline.hpp"
90 #include "runtime/javaCalls.hpp"
91 #include "runtime/javaThread.inline.hpp"
92 #include "runtime/jniHandles.inline.hpp"
93 #include "runtime/keepStackGCProcessed.hpp"
94 #include "runtime/lightweightSynchronizer.hpp"
95 #include "runtime/lockStack.hpp"
96 #include "runtime/os.hpp"
97 #include "runtime/stackFrameStream.inline.hpp"
98 #include "runtime/synchronizer.hpp"
99 #include "runtime/threadSMR.hpp"
100 #include "runtime/vframe.hpp"
101 #include "runtime/vm_version.hpp"
102 #include "services/memoryService.hpp"
103 #include "utilities/align.hpp"
104 #include "utilities/checkedCast.hpp"
105 #include "utilities/debug.hpp"
106 #include "utilities/elfFile.hpp"
107 #include "utilities/exceptions.hpp"
108 #include "utilities/macros.hpp"
109 #include "utilities/nativeCallStack.hpp"
110 #include "utilities/ostream.hpp"
111 #include "utilities/vmError.hpp"
112 #if INCLUDE_G1GC
113 #include "gc/g1/g1Arguments.hpp"
114 #include "gc/g1/g1CollectedHeap.inline.hpp"
115 #include "gc/g1/g1ConcurrentMark.hpp"
116 #include "gc/g1/g1ConcurrentMarkThread.inline.hpp"
117 #include "gc/g1/g1HeapRegionManager.hpp"
118 #include "gc/g1/g1HeapRegionRemSet.inline.hpp"
119 #endif // INCLUDE_G1GC
120 #if INCLUDE_PARALLELGC
121 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
122 #endif // INCLUDE_PARALLELGC
123 #if INCLUDE_SERIALGC
124 #include "gc/serial/serialHeap.hpp"
125 #endif // INCLUDE_SERIALGC
126 #if INCLUDE_ZGC
127 #include "gc/z/zAddress.inline.hpp"
128 #include "gc/z/zHeap.inline.hpp"
129 #endif // INCLUDE_ZGC
130 #if INCLUDE_JVMCI
131 #include "jvmci/jvmciEnv.hpp"
132 #include "jvmci/jvmciRuntime.hpp"
133 #endif
134 #ifdef LINUX
135 #include "cgroupSubsystem_linux.hpp"
136 #include "os_linux.hpp"
137 #include "osContainer_linux.hpp"
138 #endif
139
140 #define CHECK_JNI_EXCEPTION_(env, value) \
141 do { \
142 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
143 THREAD->clear_pending_jni_exception_check(); \
144 if (HAS_PENDING_EXCEPTION) { \
145 return(value); \
146 } \
147 } while (0)
148
149 #define CHECK_JNI_EXCEPTION(env) \
150 do { \
151 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env); \
152 THREAD->clear_pending_jni_exception_check(); \
153 if (HAS_PENDING_EXCEPTION) { \
154 return; \
155 } \
156 } while (0)
157
158 bool WhiteBox::_used = false;
159 volatile bool WhiteBox::compilation_locked = false;
160
161 class VM_WhiteBoxOperation : public VM_Operation {
162 public:
163 VM_WhiteBoxOperation() { }
164 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
165 bool allow_nested_vm_operations() const { return true; }
166 };
167
168
169 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
170 return (jlong)(void*)JNIHandles::resolve(obj);
171 WB_END
172
173 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
174 return heapOopSize;
175 WB_END
176
177 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
178 return (jint)os::vm_page_size();
179 WB_END
180
181 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
182 return os::vm_allocation_granularity();
183 WB_END
184
185 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
186 return os::large_page_size();
187 WB_END
188
189 WB_ENTRY(jstring, WB_PrintString(JNIEnv* env, jobject wb, jstring str, jint max_length))
190 ResourceMark rm(THREAD);
191 stringStream sb;
192 java_lang_String::print(JNIHandles::resolve(str), &sb, max_length);
193 oop result = java_lang_String::create_oop_from_str(sb.as_string(), THREAD);
194 return (jstring) JNIHandles::make_local(THREAD, result);
195 WB_END
196
197 WB_ENTRY(jint, WB_TakeLockAndHangInSafepoint(JNIEnv* env, jobject wb))
198 JavaThread* self = JavaThread::current();
199 // VMStatistic_lock is used to minimize interference with VM locking
200 MutexLocker mu(VMStatistic_lock);
201 VM_HangInSafepoint force_safepoint_stuck_op;
202 VMThread::execute(&force_safepoint_stuck_op);
203 ShouldNotReachHere();
204 return 0;
205 WB_END
206
207 class WBIsKlassAliveClosure : public LockedClassesDo {
208 Symbol* _name;
209 int _count;
210 public:
211 WBIsKlassAliveClosure(Symbol* name) : _name(name), _count(0) {}
212
213 void do_klass(Klass* k) {
214 Symbol* ksym = k->name();
215 if (ksym->fast_compare(_name) == 0) {
216 _count++;
217 } else if (k->is_instance_klass()) {
218 // Need special handling for hidden classes because the JVM
219 // appends "+<hex-address>" to hidden class names.
220 InstanceKlass *ik = InstanceKlass::cast(k);
221 if (ik->is_hidden()) {
222 ResourceMark rm;
223 char* k_name = ksym->as_C_string();
224 // Find the first '+' char and truncate the string at that point.
225 // NOTE: This will not work correctly if the original hidden class
226 // name contains a '+'.
227 char* plus_char = strchr(k_name, '+');
228 if (plus_char != nullptr) {
229 *plus_char = 0;
230 char* c_name = _name->as_C_string();
231 if (strcmp(c_name, k_name) == 0) {
232 _count++;
233 }
234 }
235 }
236 }
237 }
238
239 int count() const {
240 return _count;
241 }
242 };
243
244 WB_ENTRY(jint, WB_CountAliveClasses(JNIEnv* env, jobject target, jstring name))
245 oop h_name = JNIHandles::resolve(name);
246 if (h_name == nullptr) {
247 return 0;
248 }
249 Symbol* sym = java_lang_String::as_symbol(h_name);
250 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
251
252 WBIsKlassAliveClosure closure(sym);
253 ClassLoaderDataGraph::classes_do(&closure);
254
255 // Return the count of alive classes with this name.
256 return closure.count();
257 WB_END
258
259 WB_ENTRY(jint, WB_GetSymbolRefcount(JNIEnv* env, jobject unused, jstring name))
260 oop h_name = JNIHandles::resolve(name);
261 if (h_name == nullptr) {
262 return 0;
263 }
264 Symbol* sym = java_lang_String::as_symbol(h_name);
265 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
266 return (jint)sym->refcount();
267 WB_END
268
269
270 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
271 #if INCLUDE_JVMTI
272 ResourceMark rm;
273 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
274 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
275 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
276 assert(err == JVMTI_ERROR_NONE, "must not fail");
277 #endif
278 }
279 WB_END
280
281 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
282 #if INCLUDE_JVMTI
283 ResourceMark rm;
284 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
285 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
286 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
287 assert(err == JVMTI_ERROR_NONE, "must not fail");
288 #endif
289 }
290 WB_END
291
292
293 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
294 return (jlong)Arguments::max_heap_for_compressed_oops();
295 }
296 WB_END
297
298 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
299 tty->print_cr("Minimum heap %zu Initial heap %zu "
300 "Maximum heap %zu Space alignment %zu Heap alignment %zu",
301 MinHeapSize,
302 InitialHeapSize,
303 MaxHeapSize,
304 SpaceAlignment,
305 HeapAlignment);
306 }
307 WB_END
308
309 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
310 size_t granularity = os::vm_allocation_granularity();
311 ReservedHeapSpace rhs = HeapReserver::reserve(100 * granularity, granularity, os::vm_page_size(), nullptr);
312
313 // Check if constraints are complied
314 if (!( UseCompressedOops && rhs.is_reserved() &&
315 CompressedOops::base() != nullptr &&
316 CompressedOops::use_implicit_null_checks() )) {
317 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
318 "\tUseCompressedOops is %d\n"
319 "\trhs.base() is " PTR_FORMAT "\n"
320 "\tCompressedOops::base() is " PTR_FORMAT "\n"
321 "\tCompressedOops::use_implicit_null_checks() is %d",
322 UseCompressedOops,
323 p2i(rhs.base()),
324 p2i(CompressedOops::base()),
325 CompressedOops::use_implicit_null_checks());
326 return;
327 }
328
329 VirtualSpace vs;
330 vs.initialize(rhs, 50 * granularity);
331
332 tty->print_cr("Reading from no access area... ");
333 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
334 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
335 WB_END
336
337 WB_ENTRY(void, WB_DecodeNKlassAndAccessKlass(JNIEnv* env, jobject o, jint nKlass))
338 assert(UseCompressedClassPointers, "Should only call for UseCompressedClassPointers");
339 const narrowKlass nk = (narrowKlass)nKlass;
340 const Klass* const k = CompressedKlassPointers::decode_not_null_without_asserts(nKlass);
341 printf("WB_DecodeNKlassAndAccessKlass: nk %u k " PTR_FORMAT "\n", nk, p2i(k));
342 printf("Will attempt to crash now...\n");
343 fflush(stdout); // flush now - we will crash below
344 // Access k by calling a virtual function - will result in loading the vtable from *k
345 k->print_on(tty);
346 WB_END
347
348 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
349 size_t magnitude, size_t iterations) {
350 size_t granularity = os::vm_allocation_granularity();
351 ReservedHeapSpace rhs = HeapReserver::reserve(reserved_space_size * granularity, granularity, os::vm_page_size(), nullptr);
352 if (!rhs.is_reserved()) {
353 tty->print_cr("Failed to initialize ReservedSpace. Can't proceed.");
354 return 3;
355 }
356
357 VirtualSpace vs;
358 if (!vs.initialize(rhs, 0)) {
359 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
360 return 3;
361 }
362
363 int seed = os::random();
364 tty->print_cr("Random seed is %d", seed);
365
366 for (size_t i = 0; i < iterations; i++) {
367
368 // Whether we will shrink or grow
369 bool shrink = os::random() % 2L == 0;
370
371 // Get random delta to resize virtual space
372 size_t delta = (size_t)os::random() % magnitude;
373
374 // If we are about to shrink virtual space below zero, then expand instead
375 if (shrink && vs.committed_size() < delta) {
376 shrink = false;
377 }
378
379 // Resizing by delta
380 if (shrink) {
381 vs.shrink_by(delta);
382 } else {
383 // If expanding fails expand_by will silently return false
384 vs.expand_by(delta, true);
385 }
386 }
387 return 0;
388 }
389
390 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
391 jlong reserved_space_size, jlong magnitude, jlong iterations))
392 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
393 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
394 iterations);
395 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
396 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
397 return 1;
398 }
399
400 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
401 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
402 if (sizeof(size_t) < sizeof(jlong)) {
403 jlong size_t_max_value = (jlong)SIZE_MAX;
404 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
405 || iterations > size_t_max_value) {
406 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
407 return 2;
408 }
409 }
410
411 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
412 (size_t) magnitude, (size_t) iterations);
413 WB_END
414
415 WB_ENTRY(jboolean, WB_IsGCSupported(JNIEnv* env, jobject o, jint name))
416 return GCConfig::is_gc_supported((CollectedHeap::Name)name);
417 WB_END
418
419 WB_ENTRY(jboolean, WB_HasLibgraal(JNIEnv* env, jobject o))
420 #if INCLUDE_JVMCI
421 return JVMCI::shared_library_exists();
422 #endif
423 return false;
424 WB_END
425
426 WB_ENTRY(jboolean, WB_IsGCSupportedByJVMCICompiler(JNIEnv* env, jobject o, jint name))
427 #if INCLUDE_JVMCI
428 if (EnableJVMCI) {
429 // Enter the JVMCI env that will be used by the CompileBroker.
430 JVMCIEnv jvmciEnv(thread, __FILE__, __LINE__);
431 return jvmciEnv.init_error() == JNI_OK && jvmciEnv.runtime()->is_gc_supported(&jvmciEnv, (CollectedHeap::Name)name);
432 }
433 #endif
434 return false;
435 WB_END
436
437 WB_ENTRY(jboolean, WB_IsGCSelected(JNIEnv* env, jobject o, jint name))
438 return GCConfig::is_gc_selected((CollectedHeap::Name)name);
439 WB_END
440
441 WB_ENTRY(jboolean, WB_IsGCSelectedErgonomically(JNIEnv* env, jobject o))
442 return GCConfig::is_gc_selected_ergonomically();
443 WB_END
444
445 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
446 oop p = JNIHandles::resolve(obj);
447 #if INCLUDE_G1GC
448 if (UseG1GC) {
449 G1CollectedHeap* g1h = G1CollectedHeap::heap();
450 const G1HeapRegion* hr = g1h->heap_region_containing(p);
451 return hr->is_old_or_humongous();
452 }
453 #endif
454 #if INCLUDE_PARALLELGC
455 if (UseParallelGC) {
456 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
457 return !psh->is_in_young(p);
458 }
459 #endif
460 #if INCLUDE_ZGC
461 if (UseZGC) {
462 return ZHeap::heap()->is_old(to_zaddress(p));
463 }
464 #endif
465 #if INCLUDE_SHENANDOAHGC
466 if (UseShenandoahGC) {
467 ShenandoahHeap* sh = ShenandoahHeap::heap();
468 return sh->mode()->is_generational() ? sh->is_in_old(p) : sh->is_in(p);
469 }
470 #endif
471 #if INCLUDE_SERIALGC
472 if (UseSerialGC) {
473 return !SerialHeap::heap()->is_in_young(p);
474 }
475 #endif
476 ShouldNotReachHere();
477 return false;
478 WB_END
479
480 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
481 oop p = JNIHandles::resolve(obj);
482 return p->size() * HeapWordSize;
483 WB_END
484
485 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
486 return (jlong)SpaceAlignment;
487 WB_END
488
489 WB_ENTRY(jlong, WB_GetHeapAlignment(JNIEnv* env, jobject o))
490 return (jlong)HeapAlignment;
491 WB_END
492
493 WB_ENTRY(jboolean, WB_SupportsConcurrentGCBreakpoints(JNIEnv* env, jobject o))
494 return Universe::heap()->supports_concurrent_gc_breakpoints();
495 WB_END
496
497 WB_ENTRY(void, WB_ConcurrentGCAcquireControl(JNIEnv* env, jobject o))
498 ConcurrentGCBreakpoints::acquire_control();
499 WB_END
500
501 WB_ENTRY(void, WB_ConcurrentGCReleaseControl(JNIEnv* env, jobject o))
502 ConcurrentGCBreakpoints::release_control();
503 WB_END
504
505 WB_ENTRY(void, WB_ConcurrentGCRunToIdle(JNIEnv* env, jobject o))
506 ConcurrentGCBreakpoints::run_to_idle();
507 WB_END
508
509 WB_ENTRY(jboolean, WB_ConcurrentGCRunTo(JNIEnv* env, jobject o, jobject at))
510 Handle h_name(THREAD, JNIHandles::resolve(at));
511 ResourceMark rm;
512 const char* c_name = java_lang_String::as_utf8_string(h_name());
513 return ConcurrentGCBreakpoints::run_to(c_name);
514 WB_END
515
516 #if INCLUDE_G1GC
517
518 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
519 if (UseG1GC) {
520 G1CollectedHeap* g1h = G1CollectedHeap::heap();
521 oop result = JNIHandles::resolve(obj);
522 const G1HeapRegion* hr = g1h->heap_region_containing(result);
523 return hr->is_humongous();
524 }
525 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1IsHumongous: G1 GC is not enabled");
526 WB_END
527
528 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
529 if (UseG1GC) {
530 G1CollectedHeap* g1h = G1CollectedHeap::heap();
531 const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
532 return hr->is_humongous();
533 }
534 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToHumongousRegion: G1 GC is not enabled");
535 WB_END
536
537 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
538 if (UseG1GC) {
539 G1CollectedHeap* g1h = G1CollectedHeap::heap();
540 const G1HeapRegion* hr = g1h->heap_region_containing((void*) addr);
541 return hr->is_free();
542 }
543 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1BelongsToFreeRegion: G1 GC is not enabled");
544 WB_END
545
546 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
547 if (UseG1GC) {
548 G1CollectedHeap* g1h = G1CollectedHeap::heap();
549 size_t nr = g1h->max_num_regions();
550 return (jlong)nr;
551 }
552 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumMaxRegions: G1 GC is not enabled");
553 WB_END
554
555 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
556 if (UseG1GC) {
557 G1CollectedHeap* g1h = G1CollectedHeap::heap();
558 size_t nr = g1h->num_free_regions();
559 return (jlong)nr;
560 }
561 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1NumFreeRegions: G1 GC is not enabled");
562 WB_END
563
564 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
565 if (UseG1GC) {
566 G1CollectedHeap* g1h = G1CollectedHeap::heap();
567 return g1h->concurrent_mark()->cm_thread()->in_progress();
568 }
569 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1InConcurrentMark: G1 GC is not enabled");
570 WB_END
571
572 WB_ENTRY(jint, WB_G1CompletedConcurrentMarkCycles(JNIEnv* env, jobject o))
573 if (UseG1GC) {
574 G1CollectedHeap* g1h = G1CollectedHeap::heap();
575 G1ConcurrentMark* cm = g1h->concurrent_mark();
576 return cm->completed_mark_cycles();
577 }
578 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1CompletedConcurrentMarkCycles: G1 GC is not enabled");
579 WB_END
580
581 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
582 if (UseG1GC) {
583 return (jint)G1HeapRegion::GrainBytes;
584 }
585 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1RegionSize: G1 GC is not enabled");
586 WB_END
587
588 WB_ENTRY(jboolean, WB_G1HasRegionsToUncommit(JNIEnv* env, jobject o))
589 if (UseG1GC) {
590 return G1CollectedHeap::heap()->has_uncommittable_regions();
591 }
592 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1HasRegionsToUncommit: G1 GC is not enabled");
593 WB_END
594
595 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
596 if (UseG1GC) {
597 ResourceMark rm(THREAD);
598 G1CollectedHeap* g1h = G1CollectedHeap::heap();
599 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
600 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
601 return JNIHandles::make_local(THREAD, h());
602 }
603 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1AuxiliaryMemoryUsage: G1 GC is not enabled");
604 WB_END
605
606 WB_ENTRY(jint, WB_G1ActiveMemoryNodeCount(JNIEnv* env, jobject o))
607 if (UseG1GC) {
608 G1NUMA* numa = G1NUMA::numa();
609 return (jint)numa->num_active_nodes();
610 }
611 THROW_MSG_0(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1ActiveMemoryNodeCount: G1 GC is not enabled");
612 WB_END
613
614 WB_ENTRY(jintArray, WB_G1MemoryNodeIds(JNIEnv* env, jobject o))
615 if (UseG1GC) {
616 G1NUMA* numa = G1NUMA::numa();
617 int num_node_ids = checked_cast<int>(numa->num_active_nodes());
618 const uint* node_ids = numa->node_ids();
619
620 typeArrayOop result = oopFactory::new_intArray(num_node_ids, CHECK_NULL);
621 for (int i = 0; i < num_node_ids; i++) {
622 result->int_at_put(i, checked_cast<jint>(node_ids[i]));
623 }
624 return (jintArray) JNIHandles::make_local(THREAD, result);
625 }
626 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1MemoryNodeIds: G1 GC is not enabled");
627 WB_END
628
629 class OldRegionsLivenessClosure: public G1HeapRegionClosure {
630
631 private:
632 const int _liveness;
633 size_t _total_count;
634 size_t _total_memory;
635 size_t _total_memory_to_free;
636
637 public:
638 OldRegionsLivenessClosure(int liveness) :
639 _liveness(liveness),
640 _total_count(0),
641 _total_memory(0),
642 _total_memory_to_free(0) { }
643
644 size_t total_count() { return _total_count; }
645 size_t total_memory() { return _total_memory; }
646 size_t total_memory_to_free() { return _total_memory_to_free; }
647
648 bool do_heap_region(G1HeapRegion* r) {
649 if (r->is_old()) {
650 size_t live = r->live_bytes();
651 size_t size = r->used();
652 size_t reg_size = G1HeapRegion::GrainBytes;
653 if (size > 0 && ((int)(live * 100 / size) < _liveness)) {
654 _total_memory += size;
655 ++_total_count;
656 if (size == reg_size) {
657 // We don't include non-full regions since they are unlikely included in mixed gc
658 // for testing purposes it's enough to have lowest estimation of total memory that is expected to be freed
659 _total_memory_to_free += size - live;
660 }
661 }
662 }
663 return false;
664 }
665 };
666
667
668 WB_ENTRY(jlongArray, WB_G1GetMixedGCInfo(JNIEnv* env, jobject o, jint liveness))
669 if (!UseG1GC) {
670 THROW_MSG_NULL(vmSymbols::java_lang_UnsupportedOperationException(), "WB_G1GetMixedGCInfo: G1 GC is not enabled");
671 }
672 if (liveness < 0) {
673 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "liveness value should be non-negative");
674 }
675
676 G1CollectedHeap* g1h = G1CollectedHeap::heap();
677 OldRegionsLivenessClosure rli(liveness);
678 g1h->heap_region_iterate(&rli);
679
680 typeArrayOop result = oopFactory::new_longArray(3, CHECK_NULL);
681 result->long_at_put(0, rli.total_count());
682 result->long_at_put(1, rli.total_memory());
683 result->long_at_put(2, rli.total_memory_to_free());
684 return (jlongArray) JNIHandles::make_local(THREAD, result);
685 WB_END
686
687 #endif // INCLUDE_G1GC
688
689 // Alloc memory using the test memory tag so that we can use that to see if
690 // NMT picks it up correctly
691 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
692 jlong addr = 0;
693 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
694 return addr;
695 WB_END
696
697 // Alloc memory with pseudo call stack. The test can create pseudo malloc
698 // allocation site to stress the malloc tracking.
699 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
700 address pc = (address)(size_t)pseudo_stack;
701 NativeCallStack stack(&pc, 1);
702 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
703 WB_END
704
705 // Alloc memory with pseudo call stack and specific memory tag.
706 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint mem_tag))
707 address pc = (address)(size_t)pseudo_stack;
708 NativeCallStack stack(&pc, 1);
709 return (jlong)(uintptr_t)os::malloc(size, (MemTag)mem_tag, stack);
710 WB_END
711
712 // Free the memory allocated by NMTAllocTest
713 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
714 os::free((void*)(uintptr_t)mem);
715 WB_END
716
717 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
718 return (jlong)(uintptr_t)os::reserve_memory(size, mtTest);
719 WB_END
720
721 WB_ENTRY(jlong, WB_NMTAttemptReserveMemoryAt(JNIEnv* env, jobject o, jlong addr, jlong size))
722 return (jlong)(uintptr_t)os::attempt_reserve_memory_at((char*)(uintptr_t)addr, (size_t)size, mtTest);
723 WB_END
724
725 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
726 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
727 WB_END
728
729 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
730 os::uncommit_memory((char *)(uintptr_t)addr, size);
731 WB_END
732
733 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
734 os::release_memory((char *)(uintptr_t)addr, size);
735 WB_END
736
737 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
738 int hash_size = MallocSiteTable::hash_buckets();
739 assert(hash_size > 0, "NMT hash_size should be > 0");
740 return (jint)hash_size;
741 WB_END
742
743 WB_ENTRY(jlong, WB_NMTNewArena(JNIEnv* env, jobject o, jlong init_size))
744 Arena* arena = new (mtTest) Arena(mtTest, Arena::Tag::tag_other, size_t(init_size));
745 return (jlong)arena;
746 WB_END
747
748 WB_ENTRY(void, WB_NMTFreeArena(JNIEnv* env, jobject o, jlong arena))
749 Arena* a = (Arena*)arena;
750 delete a;
751 WB_END
752
753 WB_ENTRY(void, WB_NMTArenaMalloc(JNIEnv* env, jobject o, jlong arena, jlong size))
754 Arena* a = (Arena*)arena;
755 a->Amalloc(size_t(size));
756 WB_END
757
758 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
759 assert(method != nullptr, "method should not be null");
760 ThreadToNativeFromVM ttn(thread);
761 return env->FromReflectedMethod(method);
762 }
763
764 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
765 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
766 private:
767 int _result;
768 const bool _make_not_entrant;
769 public:
770 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
771 _result(0), _make_not_entrant(make_not_entrant) { }
772 int result() const { return _result; }
773
774 void doit() {
775 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *t = jtiwh.next(); ) {
776 if (t->has_last_Java_frame()) {
777 for (StackFrameStream fst(t, false /* update */, true /* process_frames */); !fst.is_done(); fst.next()) {
778 frame* f = fst.current();
779 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
780 Deoptimization::deoptimize(t, *f);
781 if (_make_not_entrant) {
782 nmethod* nm = CodeCache::find_nmethod(f->pc());
783 assert(nm != nullptr, "did not find nmethod");
784 nm->make_not_entrant(nmethod::InvalidationReason::WHITEBOX_DEOPTIMIZATION);
785 }
786 ++_result;
787 }
788 }
789 }
790 }
791 }
792 };
793
794 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
795 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
796 VMThread::execute(&op);
797 return op.result();
798 WB_END
799
800 WB_ENTRY(jboolean, WB_IsFrameDeoptimized(JNIEnv* env, jobject o, jint depth))
801 bool result = false;
802 if (thread->has_last_Java_frame()) {
803 ResourceMark rm(THREAD);
804 RegisterMap reg_map(thread,
805 RegisterMap::UpdateMap::include,
806 RegisterMap::ProcessFrames::include,
807 RegisterMap::WalkContinuation::skip);
808 javaVFrame *jvf = thread->last_java_vframe(®_map);
809 for (jint d = 0; d < depth && jvf != nullptr; d++) {
810 jvf = jvf->java_sender();
811 }
812 result = jvf != nullptr && jvf->fr().is_deoptimized_frame();
813 }
814 return result;
815 WB_END
816
817 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
818 DeoptimizationScope deopt_scope;
819 CodeCache::mark_all_nmethods_for_deoptimization(&deopt_scope);
820 deopt_scope.deoptimize_marked();
821 WB_END
822
823 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
824 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
825 int result = 0;
826 CHECK_JNI_EXCEPTION_(env, result);
827
828 DeoptimizationScope deopt_scope;
829 {
830 MutexLocker mu(Compile_lock);
831 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
832 if (is_osr) {
833 result += mh->method_holder()->mark_osr_nmethods(&deopt_scope, mh());
834 } else {
835 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
836 if (mh->code() != nullptr) {
837 deopt_scope.mark(mh->code());
838 ++result;
839 }
840 }
841 CodeCache::mark_for_deoptimization(&deopt_scope, mh());
842 }
843
844 deopt_scope.deoptimize_marked();
845
846 return result;
847 WB_END
848
849 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
850 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
851 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
852 MutexLocker mu(Compile_lock);
853 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
854 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
855 if (code == nullptr) {
856 return JNI_FALSE;
857 }
858 return !code->is_marked_for_deoptimization();
859 WB_END
860
861 static bool is_excluded_for_compiler(AbstractCompiler* comp, methodHandle& mh) {
862 if (comp == nullptr) {
863 return true;
864 }
865 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
866 bool exclude = directive->ExcludeOption;
867 DirectivesStack::release(directive);
868 return exclude;
869 }
870
871 static bool can_be_compiled_at_level(methodHandle& mh, jboolean is_osr, int level) {
872 if (is_osr) {
873 return CompilationPolicy::can_be_osr_compiled(mh, level);
874 } else {
875 return CompilationPolicy::can_be_compiled(mh, level);
876 }
877 }
878
879 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
880 if (method == nullptr || comp_level > CompilationPolicy::highest_compile_level()) {
881 return false;
882 }
883 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
884 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
885 MutexLocker mu(Compile_lock);
886 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
887
888 // The ExcludeOption directive is evaluated lazily upon compilation attempt. If a method was not tried to be compiled by
889 // a compiler, yet, the method object is not set to be not compilable by that compiler. Thus, evaluate the compiler directive
890 // to exclude a compilation of 'method'.
891 if (comp_level == CompLevel_any) {
892 // Both compilers could have ExcludeOption set. Check all combinations.
893 bool excluded_c1 = is_excluded_for_compiler(CompileBroker::compiler1(), mh);
894 bool excluded_c2 = is_excluded_for_compiler(CompileBroker::compiler2(), mh);
895 if (excluded_c1 && excluded_c2) {
896 // Compilation of 'method' excluded by both compilers.
897 return false;
898 }
899
900 if (excluded_c1) {
901 // C1 only has ExcludeOption set: Check if compilable with C2.
902 return can_be_compiled_at_level(mh, is_osr, CompLevel_full_optimization);
903 } else if (excluded_c2) {
904 // C2 only has ExcludeOption set: Check if compilable with C1.
905 return can_be_compiled_at_level(mh, is_osr, CompLevel_simple);
906 }
907 } else if (comp_level > CompLevel_none && is_excluded_for_compiler(CompileBroker::compiler((int)comp_level), mh)) {
908 // Compilation of 'method' excluded by compiler used for 'comp_level'.
909 return false;
910 }
911
912 return can_be_compiled_at_level(mh, is_osr, (int)comp_level);
913 WB_END
914
915 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
916 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
917 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
918 MutexLocker mu(Compile_lock);
919 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
920 return mh->queued_for_compilation();
921 WB_END
922
923 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
924 if (compLevel < CompLevel_none || compLevel > CompilationPolicy::highest_compile_level()) {
925 return false; // Intrinsic is not available on a non-existent compilation level.
926 }
927 AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
928 if (comp == nullptr) {
929 // Could have compLevel == 0, or !TieredCompilation and incompatible values of TieredStopAtLevel and compLevel.
930 tty->print_cr("WB error: no compiler for requested compilation level %d", compLevel);
931 return false;
932 }
933
934 jmethodID method_id, compilation_context_id;
935 method_id = reflected_method_to_jmid(thread, env, method);
936 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
937 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
938
939 DirectiveSet* directive;
940 if (compilation_context != nullptr) {
941 compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
942 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
943 methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
944 directive = DirectivesStack::getMatchingDirective(cch, comp);
945 } else {
946 // Calling with null matches default directive
947 directive = DirectivesStack::getDefaultDirective(comp);
948 }
949 bool result = comp->is_intrinsic_available(mh, directive);
950 DirectivesStack::release(directive);
951 return result;
952 WB_END
953
954 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
955 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
956 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
957 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
958 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
959 return (code != nullptr ? code->comp_level() : CompLevel_none);
960 WB_END
961
962 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
963 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
964 CHECK_JNI_EXCEPTION(env);
965 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
966 if (is_osr) {
967 mh->set_not_osr_compilable("WhiteBox", comp_level);
968 } else {
969 mh->set_not_compilable("WhiteBox", comp_level);
970 }
971 WB_END
972
973 WB_ENTRY(jint, WB_GetMethodDecompileCount(JNIEnv* env, jobject o, jobject method))
974 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
975 CHECK_JNI_EXCEPTION_(env, 0);
976 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
977 uint cnt = 0;
978 MethodData* mdo = mh->method_data();
979 if (mdo != nullptr) {
980 cnt = mdo->decompile_count();
981 }
982 return cnt;
983 WB_END
984
985 // Get the trap count of a method for a specific reason. If the trap count for
986 // that reason did overflow, this includes the overflow trap count of the method.
987 // If 'reason' is null, the sum of the traps for all reasons will be returned.
988 // This number includes the overflow trap count if the trap count for any reason
989 // did overflow.
990 WB_ENTRY(jint, WB_GetMethodTrapCount(JNIEnv* env, jobject o, jobject method, jstring reason_obj))
991 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
992 CHECK_JNI_EXCEPTION_(env, 0);
993 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
994 uint cnt = 0;
995 MethodData* mdo = mh->method_data();
996 if (mdo != nullptr) {
997 ResourceMark rm(THREAD);
998 char* reason_str = (reason_obj == nullptr) ?
999 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1000 bool overflow = false;
1001 for (uint reason = 0; reason < mdo->trap_reason_limit(); reason++) {
1002 if (reason_str != nullptr && !strcmp(reason_str, Deoptimization::trap_reason_name(reason))) {
1003 cnt = mdo->trap_count(reason);
1004 // Count in the overflow trap count on overflow
1005 if (cnt == (uint)-1) {
1006 cnt = mdo->trap_count_limit() + mdo->overflow_trap_count();
1007 }
1008 break;
1009 } else if (reason_str == nullptr) {
1010 uint c = mdo->trap_count(reason);
1011 if (c == (uint)-1) {
1012 c = mdo->trap_count_limit();
1013 if (!overflow) {
1014 // Count overflow trap count just once
1015 overflow = true;
1016 c += mdo->overflow_trap_count();
1017 }
1018 }
1019 cnt += c;
1020 }
1021 }
1022 }
1023 return cnt;
1024 WB_END
1025
1026 WB_ENTRY(jint, WB_GetDeoptCount(JNIEnv* env, jobject o, jstring reason_obj, jstring action_obj))
1027 if (reason_obj == nullptr && action_obj == nullptr) {
1028 return Deoptimization::total_deoptimization_count();
1029 }
1030 ResourceMark rm(THREAD);
1031 const char *reason_str = (reason_obj == nullptr) ?
1032 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(reason_obj));
1033 const char *action_str = (action_obj == nullptr) ?
1034 nullptr : java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(action_obj));
1035
1036 return Deoptimization::deoptimization_count(reason_str, action_str);
1037 WB_END
1038
1039 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
1040 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1041 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
1042 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1043 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
1044 return (code != nullptr && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
1045 WB_END
1046
1047 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1048 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1049 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1050 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1051 bool result = mh->dont_inline();
1052 mh->set_dont_inline(value == JNI_TRUE);
1053 return result;
1054 WB_END
1055
1056 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
1057 if (comp_level == CompLevel_any) {
1058 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
1059 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
1060 } else {
1061 return CompileBroker::queue_size(comp_level);
1062 }
1063 WB_END
1064
1065 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
1066 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1067 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1068 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1069 bool result = mh->force_inline();
1070 mh->set_force_inline(value == JNI_TRUE);
1071 return result;
1072 WB_END
1073
1074 #ifdef LINUX
1075 bool WhiteBox::validate_cgroup(bool cgroups_v2_enabled,
1076 const char* controllers_file,
1077 const char* proc_self_cgroup,
1078 const char* proc_self_mountinfo,
1079 u1* cg_flags) {
1080 CgroupInfo cg_infos[CG_INFO_LENGTH];
1081 return CgroupSubsystemFactory::determine_type(cg_infos, cgroups_v2_enabled, controllers_file,
1082 proc_self_cgroup,
1083 proc_self_mountinfo, cg_flags);
1084 }
1085 #endif
1086
1087 bool WhiteBox::is_asan_enabled() {
1088 #ifdef ADDRESS_SANITIZER
1089 return true;
1090 #else
1091 return false;
1092 #endif
1093 }
1094
1095 bool WhiteBox::is_ubsan_enabled() {
1096 #ifdef UNDEFINED_BEHAVIOR_SANITIZER
1097 return true;
1098 #else
1099 return false;
1100 #endif
1101 }
1102
1103 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, JavaThread* THREAD) {
1104 // Screen for unavailable/bad comp level or null method
1105 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1106 if (method == nullptr) {
1107 tty->print_cr("WB error: request to compile null method");
1108 return false;
1109 }
1110 if (method->is_abstract()) {
1111 tty->print_cr("WB error: request to compile abstract method");
1112 return false;
1113 }
1114 if (comp_level > CompilationPolicy::highest_compile_level()) {
1115 tty->print_cr("WB error: invalid compilation level %d", comp_level);
1116 return false;
1117 }
1118 if (comp == nullptr) {
1119 tty->print_cr("WB error: no compiler for requested compilation level %d", comp_level);
1120 return false;
1121 }
1122
1123 // Check if compilation is blocking
1124 methodHandle mh(THREAD, method);
1125 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, comp);
1126 bool is_blocking = !directive->BackgroundCompilationOption;
1127 DirectivesStack::release(directive);
1128
1129 // Compile method and check result
1130 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh->invocation_count(), CompileTask::Reason_Whitebox, CHECK_false);
1131 MutexLocker mu(THREAD, Compile_lock);
1132 bool is_queued = mh->queued_for_compilation();
1133 if ((!is_blocking && is_queued) || nm != nullptr) {
1134 return true;
1135 }
1136 // Check code again because compilation may be finished before Compile_lock is acquired.
1137 if (bci == InvocationEntryBci) {
1138 nmethod* code = mh->code();
1139 if (code != nullptr) {
1140 return true;
1141 }
1142 } else if (mh->lookup_osr_nmethod_for(bci, comp_level, false) != nullptr) {
1143 return true;
1144 }
1145 tty->print("WB error: failed to %s compile at level %d method ", is_blocking ? "blocking" : "", comp_level);
1146 mh->print_short_name(tty);
1147 tty->cr();
1148 if (is_blocking && is_queued) {
1149 tty->print_cr("WB error: blocking compilation is still in queue!");
1150 }
1151 return false;
1152 }
1153
1154 size_t WhiteBox::get_in_use_monitor_count() {
1155 return ObjectSynchronizer::_in_use_list.count();
1156 }
1157
1158 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
1159 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1160 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1161 return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
1162 WB_END
1163
1164 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
1165 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1166 Method* clinit = ik->class_initializer();
1167 if (clinit == nullptr || clinit->method_holder()->is_not_initialized()) {
1168 return false;
1169 }
1170 return WhiteBox::compile_method(clinit, comp_level, InvocationEntryBci, THREAD);
1171 WB_END
1172
1173 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
1174 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1175 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1176
1177 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1178 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
1179 bool result = directive->PrintAssemblyOption;
1180 DirectivesStack::release(directive);
1181
1182 return result;
1183 WB_END
1184
1185 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
1186 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1187 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1188
1189 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1190
1191 ResourceMark rm(THREAD);
1192 const char* error_msg = nullptr;
1193 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1194 InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
1195
1196 if (m == nullptr) {
1197 assert(error_msg != nullptr, "Always have an error message");
1198 tty->print_cr("Got error: %s", error_msg);
1199 return -1; // Pattern failed
1200 }
1201
1202 // Pattern works - now check if it matches
1203 int result;
1204 if (m->match(mh, InlineMatcher::force_inline)) {
1205 result = 2; // Force inline match
1206 } else if (m->match(mh, InlineMatcher::dont_inline)) {
1207 result = 1; // Dont inline match
1208 } else {
1209 result = 0; // No match
1210 }
1211 delete m;
1212 return result;
1213 WB_END
1214
1215 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
1216 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1217 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
1218
1219 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1220
1221 ResourceMark rm;
1222 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
1223
1224 const char* error_msg = nullptr;
1225
1226 BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg, false);
1227 if (m == nullptr) {
1228 assert(error_msg != nullptr, "Must have error_msg");
1229 tty->print_cr("Got error: %s", error_msg);
1230 return -1;
1231 }
1232
1233 // Pattern works - now check if it matches
1234 int result = m->matches(mh);
1235 delete m;
1236 assert(result == 0 || result == 1, "Result out of range");
1237 return result;
1238 WB_END
1239
1240 WB_ENTRY(void, WB_MarkMethodProfiled(JNIEnv* env, jobject o, jobject method))
1241 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1242 CHECK_JNI_EXCEPTION(env);
1243 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1244
1245 MethodData* mdo = mh->method_data();
1246 if (mdo == nullptr) {
1247 Method::build_profiling_method_data(mh, CHECK_AND_CLEAR);
1248 mdo = mh->method_data();
1249 }
1250 mdo->init();
1251 InvocationCounter* icnt = mdo->invocation_counter();
1252 InvocationCounter* bcnt = mdo->backedge_counter();
1253 // set i-counter according to CompilationPolicy::is_method_profiled
1254 icnt->set(Tier4MinInvocationThreshold);
1255 bcnt->set(Tier4CompileThreshold);
1256 WB_END
1257
1258 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
1259 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1260 CHECK_JNI_EXCEPTION(env);
1261 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1262 MutexLocker mu(THREAD, Compile_lock);
1263 MethodData* mdo = mh->method_data();
1264 MethodCounters* mcs = mh->method_counters();
1265
1266 if (mdo != nullptr) {
1267 mdo->init();
1268 ResourceMark rm(THREAD);
1269 int arg_count = mdo->method()->size_of_parameters();
1270 for (int i = 0; i < arg_count; i++) {
1271 mdo->set_arg_modified(i, 0);
1272 }
1273 mdo->clean_method_data(/*always_clean*/true);
1274 }
1275
1276 mh->clear_is_not_c1_compilable();
1277 mh->clear_is_not_c2_compilable();
1278 mh->clear_is_not_c2_osr_compilable();
1279 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
1280 if (mcs != nullptr) {
1281 mcs->clear_counters();
1282 }
1283 WB_END
1284
1285 template <typename T, int type_enum>
1286 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1287 if (name == nullptr) {
1288 return false;
1289 }
1290 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1291 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1292 CHECK_JNI_EXCEPTION_(env, false);
1293 const JVMFlag* flag = JVMFlag::find_declared_flag(flag_name);
1294 JVMFlag::Error result = JVMFlagAccess::get<T, type_enum>(flag, value);
1295 env->ReleaseStringUTFChars(name, flag_name);
1296 return (result == JVMFlag::SUCCESS);
1297 }
1298
1299 template <typename T, int type_enum>
1300 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value) {
1301 if (name == nullptr) {
1302 return false;
1303 }
1304 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1305 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1306 CHECK_JNI_EXCEPTION_(env, false);
1307 JVMFlag* flag = JVMFlag::find_flag(flag_name);
1308 JVMFlag::Error result = JVMFlagAccess::set<T, type_enum>(flag, value, JVMFlagOrigin::INTERNAL);
1309 env->ReleaseStringUTFChars(name, flag_name);
1310 return (result == JVMFlag::SUCCESS);
1311 }
1312
1313 template <typename T>
1314 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
1315 ResourceMark rm(thread);
1316 jclass clazz = env->FindClass(name->as_C_string());
1317 CHECK_JNI_EXCEPTION_(env, nullptr);
1318 jmethodID methodID = env->GetStaticMethodID(clazz,
1319 vmSymbols::valueOf_name()->as_C_string(),
1320 sig->as_C_string());
1321 CHECK_JNI_EXCEPTION_(env, nullptr);
1322 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
1323 CHECK_JNI_EXCEPTION_(env, nullptr);
1324 return result;
1325 }
1326
1327 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
1328 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
1329 }
1330 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
1331 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
1332 }
1333 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
1334 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
1335 }
1336 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
1337 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
1338 }*/
1339 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
1340 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
1341 }
1342
1343 static const JVMFlag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
1344 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1345 const char* flag_name = env->GetStringUTFChars(name, nullptr);
1346 CHECK_JNI_EXCEPTION_(env, nullptr);
1347 const JVMFlag* result = JVMFlag::find_declared_flag(flag_name);
1348 env->ReleaseStringUTFChars(name, flag_name);
1349 return result;
1350 }
1351
1352 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
1353 const JVMFlag* flag = getVMFlag(thread, env, name);
1354 return (flag != nullptr) && flag->is_constant_in_binary();
1355 WB_END
1356
1357 WB_ENTRY(jboolean, WB_IsDefaultVMFlag(JNIEnv* env, jobject o, jstring name))
1358 const JVMFlag* flag = getVMFlag(thread, env, name);
1359 return (flag != nullptr) && flag->is_default();
1360 WB_END
1361
1362 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
1363 const JVMFlag* flag = getVMFlag(thread, env, name);
1364 return (flag != nullptr) && !(flag->is_unlocked() || flag->is_unlocker());
1365 WB_END
1366
1367 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
1368 bool result;
1369 if (GetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result)) {
1370 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1371 return booleanBox(thread, env, result);
1372 }
1373 return nullptr;
1374 WB_END
1375
1376 template <typename T, int type_enum>
1377 jobject GetVMFlag_longBox(JNIEnv* env, JavaThread* thread, jstring name) {
1378 T result;
1379 if (GetVMFlag <T, type_enum> (thread, env, name, &result)) {
1380 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1381 return longBox(thread, env, result);
1382 }
1383 return nullptr;
1384 }
1385
1386 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
1387 return GetVMFlag_longBox<JVM_FLAG_TYPE(int)>(env, thread, name);
1388 WB_END
1389
1390 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
1391 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint)>(env, thread, name);
1392 WB_END
1393
1394 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
1395 return GetVMFlag_longBox<JVM_FLAG_TYPE(intx)>(env, thread, name);
1396 WB_END
1397
1398 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
1399 return GetVMFlag_longBox<JVM_FLAG_TYPE(uintx)>(env, thread, name);
1400 WB_END
1401
1402 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
1403 return GetVMFlag_longBox<JVM_FLAG_TYPE(uint64_t)>(env, thread, name);
1404 WB_END
1405
1406 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
1407 return GetVMFlag_longBox<JVM_FLAG_TYPE(size_t)>(env, thread, name);
1408 WB_END
1409
1410 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
1411 double result;
1412 if (GetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result)) {
1413 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1414 return doubleBox(thread, env, result);
1415 }
1416 return nullptr;
1417 WB_END
1418
1419 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
1420 ccstr ccstrResult;
1421 if (GetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, &ccstrResult)) {
1422 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1423 jstring result = env->NewStringUTF(ccstrResult);
1424 CHECK_JNI_EXCEPTION_(env, nullptr);
1425 return result;
1426 }
1427 return nullptr;
1428 WB_END
1429
1430 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
1431 bool result = value == JNI_TRUE ? true : false;
1432 SetVMFlag <JVM_FLAG_TYPE(bool)> (thread, env, name, &result);
1433 WB_END
1434
1435 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1436 int result = checked_cast<int>(value);
1437 SetVMFlag <JVM_FLAG_TYPE(int)> (thread, env, name, &result);
1438 WB_END
1439
1440 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1441 uint result = checked_cast<uint>(value);
1442 SetVMFlag <JVM_FLAG_TYPE(uint)> (thread, env, name, &result);
1443 WB_END
1444
1445 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1446 intx result = value;
1447 SetVMFlag <JVM_FLAG_TYPE(intx)> (thread, env, name, &result);
1448 WB_END
1449
1450 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1451 uintx result = value;
1452 SetVMFlag <JVM_FLAG_TYPE(uintx)> (thread, env, name, &result);
1453 WB_END
1454
1455 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1456 uint64_t result = value;
1457 SetVMFlag <JVM_FLAG_TYPE(uint64_t)> (thread, env, name, &result);
1458 WB_END
1459
1460 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1461 size_t result = value;
1462 SetVMFlag <JVM_FLAG_TYPE(size_t)> (thread, env, name, &result);
1463 WB_END
1464
1465 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1466 double result = value;
1467 SetVMFlag <JVM_FLAG_TYPE(double)> (thread, env, name, &result);
1468 WB_END
1469
1470 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1471 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1472 const char* ccstrValue;
1473 if (value == nullptr) {
1474 ccstrValue = nullptr;
1475 }
1476 else {
1477 ccstrValue = env->GetStringUTFChars(value, nullptr);
1478 CHECK_JNI_EXCEPTION(env);
1479 }
1480 {
1481 ccstr param = ccstrValue;
1482 ThreadInVMfromNative ttvfn(thread); // back to VM
1483 if (SetVMFlag <JVM_FLAG_TYPE(ccstr)> (thread, env, name, ¶m)) {
1484 assert(param == nullptr, "old value is freed automatically and not returned");
1485 }
1486 }
1487 if (value != nullptr) {
1488 env->ReleaseStringUTFChars(value, ccstrValue);
1489 }
1490 WB_END
1491
1492 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1493 WhiteBox::compilation_locked = true;
1494 WB_END
1495
1496 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1497 MonitorLocker mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1498 WhiteBox::compilation_locked = false;
1499 mo.notify_all();
1500 WB_END
1501
1502 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1503 ResourceMark rm(THREAD);
1504 int len;
1505 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1506 return (StringTable::lookup(name, len) != nullptr);
1507 WB_END
1508
1509 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1510 Universe::heap()->collect(GCCause::_wb_full_gc);
1511 WB_END
1512
1513 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1514 Universe::heap()->collect(GCCause::_wb_young_gc);
1515 WB_END
1516
1517 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1518 // static+volatile in order to force the read to happen
1519 // (not be eliminated by the compiler)
1520 static char c;
1521 static volatile char* p;
1522
1523 p = os::reserve_memory(os::vm_allocation_granularity(), mtTest);
1524 if (p == nullptr) {
1525 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1526 }
1527
1528 c = *p;
1529 WB_END
1530
1531 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1532 const char* features = VM_Version::cpu_info_string();
1533 ThreadToNativeFromVM ttn(thread);
1534 jstring features_string = env->NewStringUTF(features);
1535
1536 CHECK_JNI_EXCEPTION_(env, nullptr);
1537
1538 return features_string;
1539 WB_END
1540
1541 CodeBlobType WhiteBox::get_blob_type(const CodeBlob* code) {
1542 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1543 return CodeCache::get_code_heap(code)->code_blob_type();
1544 }
1545
1546 CodeHeap* WhiteBox::get_code_heap(CodeBlobType blob_type) {
1547 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1548 return CodeCache::get_code_heap(blob_type);
1549 }
1550
1551 struct CodeBlobStub {
1552 CodeBlobStub(const CodeBlob* blob) :
1553 name(os::strdup(blob->name())),
1554 size(blob->size()),
1555 blob_type(static_cast<jint>(WhiteBox::get_blob_type(blob))),
1556 address((jlong) blob),
1557 code_begin((jlong) blob->code_begin()),
1558 is_nmethod((jboolean) blob->is_nmethod()) { }
1559 ~CodeBlobStub() { os::free((void*) name); }
1560 const char* const name;
1561 const jint size;
1562 const jint blob_type;
1563 const jlong address;
1564 const jlong code_begin;
1565 const jboolean is_nmethod;
1566 };
1567
1568 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1569 ResourceMark rm;
1570 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1571 CHECK_JNI_EXCEPTION_(env, nullptr);
1572 jobjectArray result = env->NewObjectArray(6, clazz, nullptr);
1573
1574 jstring name = env->NewStringUTF(cb->name);
1575 CHECK_JNI_EXCEPTION_(env, nullptr);
1576 env->SetObjectArrayElement(result, 0, name);
1577
1578 jobject obj = integerBox(thread, env, cb->size);
1579 CHECK_JNI_EXCEPTION_(env, nullptr);
1580 env->SetObjectArrayElement(result, 1, obj);
1581
1582 obj = integerBox(thread, env, cb->blob_type);
1583 CHECK_JNI_EXCEPTION_(env, nullptr);
1584 env->SetObjectArrayElement(result, 2, obj);
1585
1586 obj = longBox(thread, env, cb->address);
1587 CHECK_JNI_EXCEPTION_(env, nullptr);
1588 env->SetObjectArrayElement(result, 3, obj);
1589
1590 obj = longBox(thread, env, cb->code_begin);
1591 CHECK_JNI_EXCEPTION_(env, nullptr);
1592 env->SetObjectArrayElement(result, 4, obj);
1593
1594 obj = booleanBox(thread, env, cb->is_nmethod);
1595 CHECK_JNI_EXCEPTION_(env, nullptr);
1596 env->SetObjectArrayElement(result, 5, obj);
1597
1598 return result;
1599 }
1600
1601 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1602 ResourceMark rm(THREAD);
1603 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1604 CHECK_JNI_EXCEPTION_(env, nullptr);
1605 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1606 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1607 jobjectArray result = nullptr;
1608 if (code == nullptr) {
1609 return result;
1610 }
1611 int comp_level = code->comp_level();
1612 int insts_size = code->insts_size();
1613
1614 ThreadToNativeFromVM ttn(thread);
1615 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1616 CHECK_JNI_EXCEPTION_(env, nullptr);
1617 result = env->NewObjectArray(5, clazz, nullptr);
1618 if (result == nullptr) {
1619 return result;
1620 }
1621
1622 CodeBlobStub stub(code);
1623 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1624 CHECK_JNI_EXCEPTION_(env, nullptr);
1625 env->SetObjectArrayElement(result, 0, codeBlob);
1626
1627 jobject level = integerBox(thread, env, comp_level);
1628 CHECK_JNI_EXCEPTION_(env, nullptr);
1629 env->SetObjectArrayElement(result, 1, level);
1630
1631 jbyteArray insts = env->NewByteArray(insts_size);
1632 CHECK_JNI_EXCEPTION_(env, nullptr);
1633 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1634 env->SetObjectArrayElement(result, 2, insts);
1635
1636 jobject id = integerBox(thread, env, code->compile_id());
1637 CHECK_JNI_EXCEPTION_(env, nullptr);
1638 env->SetObjectArrayElement(result, 3, id);
1639
1640 jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1641 CHECK_JNI_EXCEPTION_(env, nullptr);
1642 env->SetObjectArrayElement(result, 4, entry_point);
1643
1644 return result;
1645 WB_END
1646
1647 WB_ENTRY(void, WB_RelocateNMethodFromMethod(JNIEnv* env, jobject o, jobject method, jint blob_type))
1648 ResourceMark rm(THREAD);
1649 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1650 CHECK_JNI_EXCEPTION(env);
1651 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1652 nmethod* code = mh->code();
1653 if (code != nullptr) {
1654 MutexLocker ml_Compile_lock(Compile_lock);
1655 CompiledICLocker ic_locker(code);
1656 MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1657 code->relocate(static_cast<CodeBlobType>(blob_type));
1658 }
1659 WB_END
1660
1661 WB_ENTRY(void, WB_RelocateNMethodFromAddr(JNIEnv* env, jobject o, jlong addr, jint blob_type))
1662 ResourceMark rm(THREAD);
1663 CHECK_JNI_EXCEPTION(env);
1664 void* address = (void*) addr;
1665
1666 if (address == nullptr) {
1667 return;
1668 }
1669
1670 MutexLocker ml_Compile_lock(Compile_lock);
1671 MutexLocker ml_CompiledIC_lock(CompiledIC_lock, Mutex::_no_safepoint_check_flag);
1672 MutexLocker ml_CodeCache_lock(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1673
1674 // Verify that nmethod address is still valid
1675 CodeBlob* blob = CodeCache::find_blob(address);
1676 if (blob != nullptr && blob->is_nmethod()) {
1677 nmethod* code = blob->as_nmethod();
1678 if (code->is_in_use()) {
1679 CompiledICLocker ic_locker(code);
1680 code->relocate(static_cast<CodeBlobType>(blob_type));
1681 }
1682 }
1683 WB_END
1684
1685 CodeBlob* WhiteBox::allocate_code_blob(int size, CodeBlobType blob_type) {
1686 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1687 BufferBlob* blob;
1688 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1689 if (full_size < size) {
1690 full_size += align_up(size - full_size, oopSize);
1691 }
1692 {
1693 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1694 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1695 if (blob != nullptr) {
1696 ::new (blob) BufferBlob("WB::DummyBlob", CodeBlobKind::Buffer, full_size);
1697 }
1698 }
1699 // Track memory usage statistic after releasing CodeCache_lock
1700 MemoryService::track_code_cache_memory_usage();
1701 return blob;
1702 }
1703
1704 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1705 if (size < 0) {
1706 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1707 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1708 }
1709 return (jlong) WhiteBox::allocate_code_blob(size, static_cast<CodeBlobType>(blob_type));
1710 WB_END
1711
1712 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1713 if (addr == 0) {
1714 return;
1715 }
1716 BufferBlob::free((BufferBlob*) addr);
1717 WB_END
1718
1719 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1720 ResourceMark rm;
1721 GrowableArray<CodeBlobStub*> blobs;
1722 {
1723 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1724 CodeHeap* heap = WhiteBox::get_code_heap(static_cast<CodeBlobType>(blob_type));
1725 if (heap == nullptr) {
1726 return nullptr;
1727 }
1728 for (CodeBlob* cb = (CodeBlob*) heap->first();
1729 cb != nullptr; cb = (CodeBlob*) heap->next(cb)) {
1730 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1731 new (stub) CodeBlobStub(cb);
1732 blobs.append(stub);
1733 }
1734 }
1735 ThreadToNativeFromVM ttn(thread);
1736 jobjectArray result = nullptr;
1737 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1738 CHECK_JNI_EXCEPTION_(env, nullptr);
1739 result = env->NewObjectArray(blobs.length(), clazz, nullptr);
1740 CHECK_JNI_EXCEPTION_(env, nullptr);
1741 if (result == nullptr) {
1742 return result;
1743 }
1744 int i = 0;
1745 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1746 it != blobs.end(); ++it) {
1747 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1748 CHECK_JNI_EXCEPTION_(env, nullptr);
1749 env->SetObjectArrayElement(result, i, obj);
1750 CHECK_JNI_EXCEPTION_(env, nullptr);
1751 ++i;
1752 }
1753 return result;
1754 WB_END
1755
1756 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1757 return CompileBroker::get_compilation_activity_mode();
1758 WB_END
1759
1760 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1761 if (addr == 0) {
1762 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1763 "WB_GetCodeBlob: addr is null");
1764 }
1765 ThreadToNativeFromVM ttn(thread);
1766 CodeBlobStub stub((CodeBlob*) addr);
1767 return codeBlob2objectArray(thread, env, &stub);
1768 WB_END
1769
1770 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1771 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1772 CHECK_JNI_EXCEPTION_(env, 0);
1773 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1774 return (jlong) mh->method_data();
1775 WB_END
1776
1777 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1778 return (jlong) thread->stack_size();
1779 WB_END
1780
1781 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1782 return (jlong) thread->stack_overflow_state()->stack_available(
1783 os::current_stack_pointer()) - (jlong)StackOverflow::stack_shadow_zone_size();
1784 WB_END
1785
1786
1787 int WhiteBox::array_bytes_to_length(size_t bytes) {
1788 return Array<u1>::bytes_to_length(bytes);
1789 }
1790
1791 ///////////////
1792 // MetaspaceTestContext and MetaspaceTestArena
1793 WB_ENTRY(jlong, WB_CreateMetaspaceTestContext(JNIEnv* env, jobject wb, jlong commit_limit, jlong reserve_limit))
1794 assert(is_aligned(commit_limit, BytesPerWord),
1795 "WB_CreateMetaspaceTestContext: commit_limit is not a multiple of the system word byte size");
1796 assert(is_aligned(reserve_limit, BytesPerWord),
1797 "WB_CreateMetaspaceTestContext: reserve_limit is not a multiple of the system word byte size");
1798 metaspace::MetaspaceTestContext* context =
1799 new metaspace::MetaspaceTestContext("whitebox-metaspace-context", (size_t) commit_limit / BytesPerWord,
1800 (size_t) reserve_limit / BytesPerWord);
1801 return (jlong)p2i(context);
1802 WB_END
1803
1804 WB_ENTRY(void, WB_DestroyMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1805 delete (metaspace::MetaspaceTestContext*) context;
1806 WB_END
1807
1808 WB_ENTRY(void, WB_PurgeMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1809 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1810 context0->purge_area();
1811 WB_END
1812
1813 WB_ENTRY(void, WB_PrintMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1814 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1815 context0->print_on(tty);
1816 WB_END
1817
1818 WB_ENTRY(jlong, WB_GetTotalCommittedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1819 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1820 return (jlong)context0->committed_words() * BytesPerWord;
1821 WB_END
1822
1823 WB_ENTRY(jlong, WB_GetTotalUsedBytesInMetaspaceTestContext(JNIEnv* env, jobject wb, jlong context))
1824 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1825 return (jlong)context0->used_words() * BytesPerWord;
1826 WB_END
1827
1828 WB_ENTRY(jlong, WB_CreateArenaInTestContext(JNIEnv* env, jobject wb, jlong context, jboolean is_micro))
1829 const Metaspace::MetaspaceType type = is_micro ? Metaspace::ClassMirrorHolderMetaspaceType : Metaspace::StandardMetaspaceType;
1830 metaspace::MetaspaceTestContext* context0 = (metaspace::MetaspaceTestContext*) context;
1831 return (jlong)p2i(context0->create_arena(type));
1832 WB_END
1833
1834 WB_ENTRY(void, WB_DestroyMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena))
1835 delete (metaspace::MetaspaceTestArena*) arena;
1836 WB_END
1837
1838 WB_ENTRY(jlong, WB_AllocateFromMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong size))
1839 assert(is_aligned(size, BytesPerWord),
1840 "WB_AllocateFromMetaspaceTestArena: size is not a multiple of the system word byte size");
1841 metaspace::MetaspaceTestArena *arena0 = (metaspace::MetaspaceTestArena *)arena;
1842 MetaWord *p = arena0->allocate((size_t) size / BytesPerWord);
1843 return (jlong)p2i(p);
1844 WB_END
1845
1846 WB_ENTRY(void, WB_DeallocateToMetaspaceTestArena(JNIEnv* env, jobject wb, jlong arena, jlong p, jlong size))
1847 assert(is_aligned(size, BytesPerWord),
1848 "WB_DeallocateToMetaspaceTestArena: size is not a multiple of the system word byte size");
1849 metaspace::MetaspaceTestArena* arena0 = (metaspace::MetaspaceTestArena*) arena;
1850 arena0->deallocate((MetaWord*)p, (size_t) size / BytesPerWord);
1851 WB_END
1852
1853 WB_ENTRY(jlong, WB_GetMaxMetaspaceAllocationSize(JNIEnv* env, jobject wb))
1854 return (jlong) Metaspace::max_allocation_word_size() * BytesPerWord;
1855 WB_END
1856
1857 WB_ENTRY(jlong, WB_WordSize(JNIEnv* env))
1858 return (jlong)BytesPerWord;
1859 WB_END
1860
1861 WB_ENTRY(jlong, WB_RootChunkWordSize(JNIEnv* env))
1862 return (jlong)Metaspace::reserve_alignment_words();
1863 WB_END
1864
1865 WB_ENTRY(jboolean, WB_IsStaticallyLinked(JNIEnv* env, jobject wb))
1866 return JVM_IsStaticallyLinked();
1867 WB_END
1868
1869 //////////////
1870
1871 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1872 if (size < 0) {
1873 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1874 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1875 }
1876
1877 oop class_loader_oop = JNIHandles::resolve(class_loader);
1878 ClassLoaderData* cld = class_loader_oop != nullptr
1879 ? java_lang_ClassLoader::loader_data_acquire(class_loader_oop)
1880 : ClassLoaderData::the_null_class_loader_data();
1881
1882 void* metadata = MetadataFactory::new_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1883
1884 return (jlong)(uintptr_t)metadata;
1885 WB_END
1886
1887 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jboolean is_open,
1888 jstring version, jstring location, jobjectArray packages))
1889 Handle h_module (THREAD, JNIHandles::resolve(module));
1890 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1891 WB_END
1892
1893 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1894 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1895 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1896 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1897 WB_END
1898
1899 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1900 Handle h_module (THREAD, JNIHandles::resolve(module));
1901 Modules::add_module_exports_to_all_unnamed(h_module, package, CHECK);
1902 WB_END
1903
1904 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1905 Handle h_module (THREAD, JNIHandles::resolve(module));
1906 Modules::add_module_exports(h_module, package, Handle(), CHECK);
1907 WB_END
1908
1909 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1910 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1911 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1912 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1913 WB_END
1914
1915 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1916 if (inc < 0) {
1917 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1918 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1919 }
1920
1921 jlong max_size_t = (jlong) ((size_t) -1);
1922 if (inc > max_size_t) {
1923 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1924 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1925 }
1926
1927 size_t new_cap_until_GC = 0;
1928 size_t aligned_inc = align_down((size_t) inc, Metaspace::commit_alignment());
1929 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1930 if (!success) {
1931 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1932 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1933 "due to contention with another thread");
1934 }
1935 return (jlong) new_cap_until_GC;
1936 WB_END
1937
1938 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1939 return (jlong) MetaspaceGC::capacity_until_GC();
1940 WB_END
1941
1942 // The function is only valid when CDS is available.
1943 WB_ENTRY(jlong, WB_AOTMetaspaceRegionAlignment(JNIEnv* env, jobject wb))
1944 #if INCLUDE_CDS
1945 return (jlong)AOTMetaspace::core_region_alignment();
1946 #else
1947 ShouldNotReachHere();
1948 return 0L;
1949 #endif
1950 WB_END
1951
1952 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1953 oop obj_oop = JNIHandles::resolve(obj);
1954 return (jboolean) obj_oop->mark().has_monitor();
1955 WB_END
1956
1957 WB_ENTRY(jboolean, WB_IsAsanEnabled(JNIEnv* env))
1958 return (jboolean) WhiteBox::is_asan_enabled();
1959 WB_END
1960
1961 WB_ENTRY(jboolean, WB_IsUbsanEnabled(JNIEnv* env))
1962 return (jboolean) WhiteBox::is_ubsan_enabled();
1963 WB_END
1964
1965 WB_ENTRY(jlong, WB_getInUseMonitorCount(JNIEnv* env, jobject wb))
1966 return (jlong) WhiteBox::get_in_use_monitor_count();
1967 WB_END
1968
1969 WB_ENTRY(jint, WB_getLockStackCapacity(JNIEnv* env))
1970 return (jint) LockStack::CAPACITY;
1971 WB_END
1972
1973 WB_ENTRY(jboolean, WB_supportsRecursiveLightweightLocking(JNIEnv* env))
1974 return (jboolean) VM_Version::supports_recursive_lightweight_locking();
1975 WB_END
1976
1977 WB_ENTRY(jboolean, WB_DeflateIdleMonitors(JNIEnv* env, jobject wb))
1978 log_info(monitorinflation)("WhiteBox initiated DeflateIdleMonitors");
1979 return ObjectSynchronizer::request_deflate_idle_monitors_from_wb();
1980 WB_END
1981
1982 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1983 VM_ForceSafepoint force_safepoint_op;
1984 VMThread::execute(&force_safepoint_op);
1985 WB_END
1986
1987 WB_ENTRY(void, WB_ForceClassLoaderStatsSafepoint(JNIEnv* env, jobject wb))
1988 nullStream dev_null;
1989 ClassLoaderStatsVMOperation force_op(&dev_null);
1990 VMThread::execute(&force_op);
1991 WB_END
1992
1993 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1994 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
1995 return (jlong) ik->constants();
1996 WB_END
1997
1998 WB_ENTRY(jobjectArray, WB_GetResolvedReferences(JNIEnv* env, jobject wb, jclass klass))
1999 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2000 objArrayOop resolved_refs= ik->constants()->resolved_references();
2001 return (jobjectArray)JNIHandles::make_local(THREAD, resolved_refs);
2002 WB_END
2003
2004 WB_ENTRY(jobjectArray, WB_getObjectsViaKlassOopMaps(JNIEnv* env, jobject wb, jobject thing))
2005 oop aoop = JNIHandles::resolve(thing);
2006 if (!aoop->is_instance()) {
2007 return nullptr;
2008 }
2009 instanceHandle ih(THREAD, (instanceOop) aoop);
2010 InstanceKlass* klass = InstanceKlass::cast(ih->klass());
2011 if (klass->nonstatic_oop_map_count() == 0) {
2012 return nullptr;
2013 }
2014 const OopMapBlock* map = klass->start_of_nonstatic_oop_maps();
2015 const OopMapBlock* const end = map + klass->nonstatic_oop_map_count();
2016 int oop_count = 0;
2017 while (map < end) {
2018 oop_count += map->count();
2019 map++;
2020 }
2021
2022 objArrayHandle result_array =
2023 oopFactory::new_objArray_handle(vmClasses::Object_klass(), oop_count, CHECK_NULL);
2024 map = klass->start_of_nonstatic_oop_maps();
2025 int index = 0;
2026 while (map < end) {
2027 int offset = map->offset();
2028 for (unsigned int j = 0; j < map->count(); j++) {
2029 result_array->obj_at_put(index++, ih->obj_field(offset));
2030 offset += heapOopSize;
2031 }
2032 map++;
2033 }
2034 return (jobjectArray)JNIHandles::make_local(THREAD, result_array());
2035 WB_END
2036
2037 // Collect Object oops but not value objects...loaded from heap
2038 class CollectObjectOops : public BasicOopIterateClosure {
2039 public:
2040 GrowableArray<Handle>* _array;
2041
2042 CollectObjectOops() {
2043 _array = new GrowableArray<Handle>(128);
2044 }
2045
2046 void add_oop(oop o) {
2047 Handle oh = Handle(Thread::current(), o);
2048 if (oh != nullptr && oh->is_inline_type()) {
2049 oh->oop_iterate(this);
2050 } else {
2051 _array->append(oh);
2052 }
2053 }
2054
2055 template <class T> inline void add_oop(T* p) { add_oop(HeapAccess<>::oop_load(p)); }
2056 void do_oop(oop* o) { add_oop(o); }
2057 void do_oop(narrowOop* v) { add_oop(v); }
2058
2059 jobjectArray create_jni_result(JNIEnv* env, TRAPS) {
2060 objArrayHandle result_array =
2061 oopFactory::new_objArray_handle(vmClasses::Object_klass(), _array->length(), CHECK_NULL);
2062 for (int i = 0 ; i < _array->length(); i++) {
2063 result_array->obj_at_put(i, _array->at(i)());
2064 }
2065 return (jobjectArray)JNIHandles::make_local(THREAD, result_array());
2066 }
2067 };
2068
2069 // Collect Object oops but not value objects...loaded from frames
2070 class CollectFrameObjectOops : public BasicOopIterateClosure {
2071 public:
2072 CollectObjectOops _collect;
2073
2074 template <class T> inline void add_oop(T* p) { _collect.add_oop(RawAccess<>::oop_load(p)); }
2075 void do_oop(oop* o) { add_oop(o); }
2076 void do_oop(narrowOop* v) { add_oop(v); }
2077
2078 jobjectArray create_jni_result(JNIEnv* env, TRAPS) {
2079 return _collect.create_jni_result(env, THREAD);
2080 }
2081 };
2082
2083 // Collect Object oops for the given oop, iterate through value objects
2084 WB_ENTRY(jobjectArray, WB_getObjectsViaOopIterator(JNIEnv* env, jobject wb, jobject thing))
2085 ResourceMark rm(thread);
2086 Handle objh(thread, JNIHandles::resolve(thing));
2087 CollectObjectOops collectOops;
2088 objh->oop_iterate(&collectOops);
2089 return collectOops.create_jni_result(env, THREAD);
2090 WB_END
2091
2092 // Collect Object oops for the given frame deep, iterate through value objects
2093 WB_ENTRY(jobjectArray, WB_getObjectsViaFrameOopIterator(JNIEnv* env, jobject wb, jint depth))
2094 KeepStackGCProcessedMark ksgcpm(THREAD);
2095 ResourceMark rm(THREAD);
2096 CollectFrameObjectOops collectOops;
2097 StackFrameStream sfs(thread, true /* update */, true /* process_frames */);
2098 while (depth > 0) { // Skip the native WB API frame
2099 sfs.next();
2100 frame* f = sfs.current();
2101 f->oops_do(&collectOops, nullptr, sfs.register_map());
2102 depth--;
2103 }
2104 return collectOops.create_jni_result(env, THREAD);
2105 WB_END
2106
2107 WB_ENTRY(jint, WB_getFieldEntriesLength(JNIEnv* env, jobject wb, jclass klass))
2108 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2109 ConstantPool* cp = ik->constants();
2110 if (cp->cache() == nullptr) {
2111 return -1;
2112 }
2113 return cp->resolved_field_entries_length();
2114 WB_END
2115
2116 WB_ENTRY(jint, WB_getFieldCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2117 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2118 ConstantPool* cp = ik->constants();
2119 if (cp->cache() == nullptr) {
2120 return -1;
2121 }
2122 return cp->resolved_field_entry_at(index)->constant_pool_index();
2123 WB_END
2124
2125 WB_ENTRY(jint, WB_getMethodEntriesLength(JNIEnv* env, jobject wb, jclass klass))
2126 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2127 ConstantPool* cp = ik->constants();
2128 if (cp->cache() == nullptr) {
2129 return -1;
2130 }
2131 return cp->resolved_method_entries_length();
2132 WB_END
2133
2134 WB_ENTRY(jint, WB_getMethodCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2135 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2136 ConstantPool* cp = ik->constants();
2137 if (cp->cache() == nullptr) {
2138 return -1;
2139 }
2140 return cp->resolved_method_entry_at(index)->constant_pool_index();
2141 WB_END
2142
2143 WB_ENTRY(jint, WB_getIndyInfoLength(JNIEnv* env, jobject wb, jclass klass))
2144 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2145 ConstantPool* cp = ik->constants();
2146 if (cp->cache() == nullptr) {
2147 return -1;
2148 }
2149 return cp->resolved_indy_entries_length();
2150 WB_END
2151
2152 WB_ENTRY(jint, WB_getIndyCPIndex(JNIEnv* env, jobject wb, jclass klass, jint index))
2153 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(klass));
2154 ConstantPool* cp = ik->constants();
2155 if (cp->cache() == nullptr) {
2156 return -1;
2157 }
2158 return cp->resolved_indy_entry_at(index)->constant_pool_index();
2159 WB_END
2160
2161 WB_ENTRY(jobject, WB_printClasses(JNIEnv* env, jobject wb, jstring class_name_pattern, jint flags))
2162 ThreadToNativeFromVM ttnfv(thread);
2163 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2164 ResourceMark rm;
2165 stringStream st;
2166 {
2167 ThreadInVMfromNative ttvfn(thread); // back to VM
2168 ClassPrinter::print_classes(c, flags, &st);
2169 }
2170 jstring result = env->NewStringUTF(st.freeze());
2171 CHECK_JNI_EXCEPTION_(env, nullptr);
2172 return result;
2173 WB_END
2174
2175 WB_ENTRY(jobject, WB_printMethods(JNIEnv* env, jobject wb, jstring class_name_pattern, jstring method_pattern, jint flags))
2176 ThreadToNativeFromVM ttnfv(thread);
2177 const char* c = env->GetStringUTFChars(class_name_pattern, nullptr);
2178 const char* m = env->GetStringUTFChars(method_pattern, nullptr);
2179 ResourceMark rm;
2180 stringStream st;
2181 {
2182 ThreadInVMfromNative ttvfn(thread); // back to VM
2183 ClassPrinter::print_methods(c, m, flags, &st);
2184 }
2185 jstring result = env->NewStringUTF(st.freeze());
2186 CHECK_JNI_EXCEPTION_(env, nullptr);
2187 return result;
2188 WB_END
2189
2190 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
2191 VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
2192 VMThread::execute(&clear_ics);
2193 WB_END
2194
2195 template <typename T>
2196 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
2197 assert(value != nullptr, "sanity");
2198 if (method == nullptr || name == nullptr) {
2199 return false;
2200 }
2201 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
2202 CHECK_JNI_EXCEPTION_(env, false);
2203 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
2204 // can't be in VM when we call JNI
2205 ThreadToNativeFromVM ttnfv(thread);
2206 const char* flag_name = env->GetStringUTFChars(name, nullptr);
2207 CHECK_JNI_EXCEPTION_(env, false);
2208 CompileCommandEnum option = CompilerOracle::string_to_option(flag_name);
2209 env->ReleaseStringUTFChars(name, flag_name);
2210 if (option == CompileCommandEnum::Unknown) {
2211 return false;
2212 }
2213 if (!CompilerOracle::option_matches_type(option, *value)) {
2214 return false;
2215 }
2216 return CompilerOracle::has_option_value(mh, option, *value);
2217 }
2218
2219 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2220 bool result;
2221 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
2222 // can't be in VM when we call JNI
2223 ThreadToNativeFromVM ttnfv(thread);
2224 return booleanBox(thread, env, result);
2225 }
2226 return nullptr;
2227 WB_END
2228
2229 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2230 intx result;
2231 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
2232 // can't be in VM when we call JNI
2233 ThreadToNativeFromVM ttnfv(thread);
2234 return longBox(thread, env, result);
2235 }
2236 return nullptr;
2237 WB_END
2238
2239 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2240 uintx result;
2241 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
2242 // can't be in VM when we call JNI
2243 ThreadToNativeFromVM ttnfv(thread);
2244 return longBox(thread, env, result);
2245 }
2246 return nullptr;
2247 WB_END
2248
2249 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2250 double result;
2251 if (GetMethodOption <double> (thread, env, method, name, &result)) {
2252 // can't be in VM when we call JNI
2253 ThreadToNativeFromVM ttnfv(thread);
2254 return doubleBox(thread, env, result);
2255 }
2256 return nullptr;
2257 WB_END
2258
2259 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
2260 ccstr ccstrResult;
2261 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
2262 // can't be in VM when we call JNI
2263 ThreadToNativeFromVM ttnfv(thread);
2264 jstring result = env->NewStringUTF(ccstrResult);
2265 CHECK_JNI_EXCEPTION_(env, nullptr);
2266 return result;
2267 }
2268 return nullptr;
2269 WB_END
2270
2271 WB_ENTRY(jobject, WB_GetDefaultArchivePath(JNIEnv* env, jobject wb))
2272 const char* p = CDSConfig::default_archive_path();
2273 ThreadToNativeFromVM ttn(thread);
2274 jstring path_string = env->NewStringUTF(p);
2275
2276 CHECK_JNI_EXCEPTION_(env, nullptr);
2277
2278 return path_string;
2279 WB_END
2280
2281 WB_ENTRY(jboolean, WB_IsSharingEnabled(JNIEnv* env, jobject wb))
2282 return CDSConfig::is_using_archive();
2283 WB_END
2284
2285 WB_ENTRY(jint, WB_GetCDSGenericHeaderMinVersion(JNIEnv* env, jobject wb))
2286 #if INCLUDE_CDS
2287 return (jint)CDS_GENERIC_HEADER_SUPPORTED_MIN_VERSION;
2288 #else
2289 ShouldNotReachHere();
2290 return (jint)-1;
2291 #endif
2292 WB_END
2293
2294 WB_ENTRY(jint, WB_GetCDSCurrentVersion(JNIEnv* env, jobject wb))
2295 #if INCLUDE_CDS
2296 return (jint)CURRENT_CDS_ARCHIVE_VERSION;
2297 #else
2298 ShouldNotReachHere();
2299 return (jint)-1;
2300 #endif
2301 WB_END
2302
2303 WB_ENTRY(jboolean, WB_CDSMemoryMappingFailed(JNIEnv* env, jobject wb))
2304 return FileMapInfo::memory_mapping_failed();
2305 WB_END
2306
2307 WB_ENTRY(jboolean, WB_IsSharedInternedString(JNIEnv* env, jobject wb, jobject str))
2308 ResourceMark rm(THREAD);
2309 oop str_oop = JNIHandles::resolve(str);
2310 int length;
2311 jchar* chars = java_lang_String::as_unicode_string(str_oop, length, CHECK_(false));
2312 return StringTable::lookup_shared(chars, length) == str_oop;
2313 WB_END
2314
2315 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
2316 return (jboolean)AOTMetaspace::in_aot_cache(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2317 WB_END
2318
2319 WB_ENTRY(jboolean, WB_AreSharedStringsMapped(JNIEnv* env))
2320 return ArchiveHeapLoader::is_mapped();
2321 WB_END
2322
2323 WB_ENTRY(void, WB_LinkClass(JNIEnv* env, jobject wb, jclass clazz))
2324 Klass *k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
2325 if (!k->is_instance_klass()) {
2326 return;
2327 }
2328 InstanceKlass *ik = InstanceKlass::cast(k);
2329 ik->link_class(THREAD); // may throw verification error
2330 WB_END
2331
2332 WB_ENTRY(jboolean, WB_AreOpenArchiveHeapObjectsMapped(JNIEnv* env))
2333 return ArchiveHeapLoader::is_mapped();
2334 WB_END
2335
2336 WB_ENTRY(jboolean, WB_IsCDSIncluded(JNIEnv* env))
2337 #if INCLUDE_CDS
2338 // An exploded build inhibits use of CDS. Therefore, for the
2339 // purpose of testing, the JVM can be treated as not having CDS
2340 // built in at all.
2341 return ClassLoader::has_jrt_entry();
2342 #else
2343 return false;
2344 #endif // INCLUDE_CDS
2345 WB_END
2346
2347 WB_ENTRY(jboolean, WB_isC2OrJVMCIIncluded(JNIEnv* env))
2348 #if COMPILER2_OR_JVMCI
2349 return true;
2350 #else
2351 return false;
2352 #endif
2353 WB_END
2354
2355 WB_ENTRY(jboolean, WB_IsJVMCISupportedByGC(JNIEnv* env))
2356 #if INCLUDE_JVMCI
2357 return JVMCIGlobals::gc_supports_jvmci();
2358 #else
2359 return false;
2360 #endif
2361 WB_END
2362
2363 WB_ENTRY(jboolean, WB_CanWriteJavaHeapArchive(JNIEnv* env))
2364 return !CDSConfig::are_vm_options_incompatible_with_dumping_heap();
2365 WB_END
2366
2367
2368 WB_ENTRY(jboolean, WB_IsJFRIncluded(JNIEnv* env))
2369 #if INCLUDE_JFR
2370 return true;
2371 #else
2372 return false;
2373 #endif // INCLUDE_JFR
2374 WB_END
2375
2376 WB_ENTRY(jboolean, WB_IsDTraceIncluded(JNIEnv* env))
2377 #if defined(DTRACE_ENABLED)
2378 return true;
2379 #else
2380 return false;
2381 #endif // DTRACE_ENABLED
2382 WB_END
2383
2384 #if INCLUDE_CDS
2385
2386 WB_ENTRY(jint, WB_GetCDSOffsetForName(JNIEnv* env, jobject o, jstring name))
2387 ResourceMark rm;
2388 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2389 jint result = (jint)CDSConstants::get_cds_offset(c_name);
2390 return result;
2391 WB_END
2392
2393 WB_ENTRY(jint, WB_GetCDSConstantForName(JNIEnv* env, jobject o, jstring name))
2394 ResourceMark rm;
2395 char* c_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2396 jint result = (jint)CDSConstants::get_cds_constant(c_name);
2397 return result;
2398 WB_END
2399
2400 #endif // INCLUDE_CDS
2401
2402 WB_ENTRY(jboolean, WB_HandshakeReadMonitors(JNIEnv* env, jobject wb, jobject thread_handle))
2403 class ReadMonitorsHandshakeClosure : public HandshakeClosure {
2404 jboolean _executed;
2405
2406 void do_thread(Thread* th) {
2407 JavaThread* jt = JavaThread::cast(th);
2408 ResourceMark rm;
2409
2410 GrowableArray<MonitorInfo*>* info = new GrowableArray<MonitorInfo*>();
2411
2412 if (!jt->has_last_Java_frame()) {
2413 return;
2414 }
2415 RegisterMap rmap(jt,
2416 RegisterMap::UpdateMap::include,
2417 RegisterMap::ProcessFrames::include,
2418 RegisterMap::WalkContinuation::skip);
2419 for (javaVFrame* vf = jt->last_java_vframe(&rmap); vf != nullptr; vf = vf->java_sender()) {
2420 GrowableArray<MonitorInfo*> *monitors = vf->monitors();
2421 if (monitors != nullptr) {
2422 int len = monitors->length();
2423 // Walk monitors youngest to oldest
2424 for (int i = len - 1; i >= 0; i--) {
2425 MonitorInfo* mon_info = monitors->at(i);
2426 if (mon_info->eliminated()) continue;
2427 oop owner = mon_info->owner();
2428 if (owner != nullptr) {
2429 info->append(mon_info);
2430 }
2431 }
2432 }
2433 }
2434 _executed = true;
2435 }
2436
2437 public:
2438 ReadMonitorsHandshakeClosure() : HandshakeClosure("WB_HandshakeReadMonitors"), _executed(false) {}
2439 jboolean executed() const { return _executed; }
2440 };
2441
2442 ReadMonitorsHandshakeClosure rmhc;
2443 if (thread_handle != nullptr) {
2444 ThreadsListHandle tlh;
2445 JavaThread* target = nullptr;
2446 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2447 if (is_alive) {
2448 Handshake::execute(&rmhc, &tlh, target);
2449 }
2450 }
2451 return rmhc.executed();
2452 WB_END
2453
2454 WB_ENTRY(jint, WB_HandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle, jboolean all_threads))
2455 class TraceSelfHandshakeClosure : public HandshakeClosure {
2456 jint _num_threads_completed;
2457
2458 void do_thread(Thread* th) {
2459 JavaThread* jt = JavaThread::cast(th);
2460 ResourceMark rm;
2461
2462 jt->print_on(tty);
2463 jt->print_stack_on(tty);
2464 tty->cr();
2465 AtomicAccess::inc(&_num_threads_completed);
2466 }
2467
2468 public:
2469 TraceSelfHandshakeClosure(Thread* thread) : HandshakeClosure("WB_TraceSelf"), _num_threads_completed(0) {}
2470
2471 jint num_threads_completed() const { return _num_threads_completed; }
2472 };
2473 TraceSelfHandshakeClosure tshc(Thread::current());
2474
2475 if (all_threads) {
2476 Handshake::execute(&tshc);
2477 } else if (thread_handle != nullptr) {
2478 ThreadsListHandle tlh;
2479 JavaThread* target = nullptr;
2480 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2481 if (is_alive) {
2482 Handshake::execute(&tshc, &tlh, target);
2483 }
2484 }
2485 return tshc.num_threads_completed();
2486 WB_END
2487
2488 WB_ENTRY(void, WB_AsyncHandshakeWalkStack(JNIEnv* env, jobject wb, jobject thread_handle))
2489 class TraceSelfHandshakeClosure : public AsyncHandshakeClosure {
2490 JavaThread* _self;
2491 void do_thread(Thread* th) {
2492 assert(th->is_Java_thread(), "sanity");
2493 // AsynchHandshake handshakes are only executed by target.
2494 assert(_self == th, "Must be");
2495 assert(Thread::current() == th, "Must be");
2496 JavaThread* jt = JavaThread::cast(th);
2497 ResourceMark rm;
2498 jt->print_on(tty);
2499 jt->print_stack_on(tty);
2500 tty->cr();
2501 }
2502
2503 public:
2504 TraceSelfHandshakeClosure(JavaThread* self_target) : AsyncHandshakeClosure("WB_TraceSelf"), _self(self_target) {}
2505 };
2506 if (thread_handle != nullptr) {
2507 ThreadsListHandle tlh;
2508 JavaThread* target = nullptr;
2509 bool is_alive = tlh.cv_internal_thread_to_JavaThread(thread_handle, &target, nullptr);
2510 if (is_alive) {
2511 TraceSelfHandshakeClosure* tshc = new TraceSelfHandshakeClosure(target);
2512 Handshake::execute(tshc, target);
2513 }
2514 }
2515 WB_END
2516
2517 static volatile int _emulated_lock = 0;
2518
2519 WB_ENTRY(void, WB_LockAndBlock(JNIEnv* env, jobject wb, jboolean suspender))
2520 JavaThread* self = JavaThread::current();
2521
2522 {
2523 // Before trying to acquire the lock transition into a safepoint safe state.
2524 // Otherwise if either suspender or suspendee blocks for a safepoint
2525 // in ~ThreadBlockInVM the other one could loop forever trying to acquire
2526 // the lock without allowing the safepoint to progress.
2527 ThreadBlockInVM tbivm(self);
2528
2529 // We will deadlock here if we are 'suspender' and 'suspendee'
2530 // suspended in ~ThreadBlockInVM. This verifies we only suspend
2531 // at the right place.
2532 while (AtomicAccess::cmpxchg(&_emulated_lock, 0, 1) != 0) {}
2533 assert(_emulated_lock == 1, "Must be locked");
2534
2535 // Sleep much longer in suspendee to force situation where
2536 // 'suspender' is waiting above to acquire lock.
2537 os::naked_short_sleep(suspender ? 1 : 10);
2538 }
2539 AtomicAccess::store(&_emulated_lock, 0);
2540 WB_END
2541
2542 // Some convenience methods to deal with objects from java
2543 int WhiteBox::offset_for_field(const char* field_name, oop object,
2544 Symbol* signature_symbol) {
2545 assert(field_name != nullptr && strlen(field_name) > 0, "Field name not valid");
2546
2547 //Only non-array oops have fields. Don't call this function on arrays!
2548 InstanceKlass* ik = InstanceKlass::cast(object->klass());
2549
2550 //Create symbols to look for in the class
2551 TempNewSymbol name_symbol = SymbolTable::new_symbol(field_name);
2552
2553 //To be filled in with an offset of the field we're looking for
2554 fieldDescriptor fd;
2555
2556 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
2557 if (res == nullptr) {
2558 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
2559 name_symbol->as_C_string());
2560 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
2561 }
2562
2563 //fetch the field at the offset we've found
2564 int dest_offset = fd.offset();
2565
2566 return dest_offset;
2567 }
2568
2569
2570 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
2571 int offset = offset_for_field(field_name, object,
2572 vmSymbols::string_signature());
2573 oop string = object->obj_field(offset);
2574 if (string == nullptr) {
2575 return nullptr;
2576 }
2577 const char* ret = java_lang_String::as_utf8_string(string);
2578 return ret;
2579 }
2580
2581 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
2582 int offset =
2583 offset_for_field(field_name, object, vmSymbols::bool_signature());
2584 bool ret = (object->bool_field(offset) == JNI_TRUE);
2585 return ret;
2586 }
2587
2588 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
2589 ResourceMark rm;
2590 Klass* klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(wbclass));
2591 const char* klass_name = klass->external_name();
2592
2593 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
2594
2595 // one by one registration natives for exception catching
2596 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
2597 CHECK_JNI_EXCEPTION(env);
2598 for (int i = 0, n = method_count; i < n; ++i) {
2599 // Skip dummy entries
2600 if (method_array[i].fnPtr == nullptr) continue;
2601 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
2602 jthrowable throwable_obj = env->ExceptionOccurred();
2603 if (throwable_obj != nullptr) {
2604 env->ExceptionClear();
2605 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
2606 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
2607 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
2608 tty->print_cr("Warning: 'NoSuchMethodError' on register of %s::%s%s",
2609 klass_name, method_array[i].name, method_array[i].signature);
2610 }
2611 } else {
2612 // Registration failed unexpectedly.
2613 tty->print_cr("Warning: unexpected error on register of %s::%s%s. All methods will be unregistered",
2614 klass_name, method_array[i].name, method_array[i].signature);
2615 env->UnregisterNatives(wbclass);
2616 break;
2617 }
2618 }
2619 }
2620 }
2621
2622 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
2623 // can't be in VM when we call JNI
2624 ThreadToNativeFromVM ttnfv(thread);
2625 const char* dir = env->GetStringUTFChars(compDirect, nullptr);
2626 CHECK_JNI_EXCEPTION_(env, 0);
2627 int ret;
2628 {
2629 ThreadInVMfromNative ttvfn(thread); // back to VM
2630 ret = DirectivesParser::parse_string(dir, tty);
2631 }
2632 env->ReleaseStringUTFChars(compDirect, dir);
2633 // -1 for error parsing directive. Return 0 as number of directives added.
2634 if (ret == -1) {
2635 ret = 0;
2636 }
2637 return (jint) ret;
2638 WB_END
2639
2640 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
2641 DirectivesStack::pop(count);
2642 WB_END
2643
2644 // Checks that the library libfile has the noexecstack bit set.
2645 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
2646 jboolean ret = false;
2647 #ifdef LINUX
2648 // Can't be in VM when we call JNI.
2649 ThreadToNativeFromVM ttnfv(thread);
2650 const char* lf = env->GetStringUTFChars(libfile, nullptr);
2651 CHECK_JNI_EXCEPTION_(env, 0);
2652 ret = (jboolean) ElfFile::specifies_noexecstack(lf);
2653 env->ReleaseStringUTFChars(libfile, lf);
2654 #endif
2655 return ret;
2656 WB_END
2657
2658 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
2659 LINUX_ONLY(return OSContainer::is_containerized();)
2660 return false;
2661 WB_END
2662
2663 // Physical memory of the host machine (including containers)
2664 WB_ENTRY(jlong, WB_HostPhysicalMemory(JNIEnv* env, jobject o))
2665 LINUX_ONLY(return static_cast<jlong>(os::Linux::physical_memory());)
2666 return static_cast<jlong>(os::physical_memory());
2667 WB_END
2668
2669 // Available memory of the host machine (container-aware)
2670 WB_ENTRY(jlong, WB_HostAvailableMemory(JNIEnv* env, jobject o))
2671 physical_memory_size_type avail_mem = 0;
2672 // Return value ignored - defaulting to 0 on failure.
2673 (void)os::available_memory(avail_mem);
2674 return static_cast<jlong>(avail_mem);
2675 WB_END
2676
2677 // Physical swap of the host machine (including containers), Linux only.
2678 WB_ENTRY(jlong, WB_HostPhysicalSwap(JNIEnv* env, jobject o))
2679 LINUX_ONLY(return (jlong)os::Linux::host_swap();)
2680 return -1; // Not used/implemented on other platforms
2681 WB_END
2682
2683 WB_ENTRY(jint, WB_ValidateCgroup(JNIEnv* env,
2684 jobject o,
2685 jboolean cgroups_v2_enabled,
2686 jstring controllers_file,
2687 jstring proc_self_cgroup,
2688 jstring proc_self_mountinfo))
2689 jint ret = 0;
2690 #ifdef LINUX
2691 ThreadToNativeFromVM ttnfv(thread);
2692 const char* c_file = env->GetStringUTFChars(controllers_file, nullptr);
2693 CHECK_JNI_EXCEPTION_(env, 0);
2694 const char* p_s_cgroup = env->GetStringUTFChars(proc_self_cgroup, nullptr);
2695 CHECK_JNI_EXCEPTION_(env, 0);
2696 const char* p_s_mountinfo = env->GetStringUTFChars(proc_self_mountinfo, nullptr);
2697 CHECK_JNI_EXCEPTION_(env, 0);
2698 u1 cg_type_flags = 0;
2699 // This sets cg_type_flags
2700 WhiteBox::validate_cgroup(cgroups_v2_enabled, c_file, p_s_cgroup, p_s_mountinfo, &cg_type_flags);
2701 ret = (jint)cg_type_flags;
2702 env->ReleaseStringUTFChars(controllers_file, c_file);
2703 env->ReleaseStringUTFChars(proc_self_cgroup, p_s_cgroup);
2704 env->ReleaseStringUTFChars(proc_self_mountinfo, p_s_mountinfo);
2705 #endif
2706 return ret;
2707 WB_END
2708
2709 // Available cpus of the host machine, Linux only.
2710 // Used in container testing.
2711 WB_ENTRY(jint, WB_HostCPUs(JNIEnv* env, jobject o))
2712 LINUX_ONLY(return os::Linux::active_processor_count();)
2713 return -1; // Not used/implemented on other platforms
2714 WB_END
2715
2716 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
2717 os::print_os_info(tty);
2718 WB_END
2719
2720 // Elf decoder
2721 WB_ENTRY(void, WB_DisableElfSectionCache(JNIEnv* env))
2722 #if !defined(_WINDOWS) && !defined(__APPLE__) && !defined(_AIX)
2723 ElfFile::_do_not_cache_elf_section = true;
2724 #endif
2725 WB_END
2726
2727 WB_ENTRY(jlong, WB_ResolvedMethodItemsCount(JNIEnv* env, jobject o))
2728 return (jlong) ResolvedMethodTable::items_count();
2729 WB_END
2730
2731 WB_ENTRY(jint, WB_GetKlassMetadataSize(JNIEnv* env, jobject wb, jclass mirror))
2732 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(mirror));
2733 // Return size in bytes.
2734 return k->size() * wordSize;
2735 WB_END
2736
2737 // See test/hotspot/jtreg/runtime/Thread/ThreadObjAccessAtExit.java.
2738 // It explains how the thread's priority field is used for test state coordination.
2739 //
2740 WB_ENTRY(void, WB_CheckThreadObjOfTerminatingThread(JNIEnv* env, jobject wb, jobject target_handle))
2741 oop target_oop = JNIHandles::resolve_non_null(target_handle);
2742 jlong tid = java_lang_Thread::thread_id(target_oop);
2743 JavaThread* target = java_lang_Thread::thread(target_oop);
2744
2745 // Grab a ThreadsListHandle to protect the target thread whilst terminating
2746 ThreadsListHandle tlh;
2747
2748 // Look up the target thread by tid to ensure it is present
2749 JavaThread* t = tlh.list()->find_JavaThread_from_java_tid(tid);
2750 if (t == nullptr) {
2751 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread not found in ThreadsList!");
2752 }
2753
2754 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is protected");
2755 // Allow target to terminate by boosting priority
2756 java_lang_Thread::set_priority(t->threadObj(), ThreadPriority(NormPriority + 1));
2757
2758 // Now wait for the target to terminate
2759 while (!target->is_terminated()) {
2760 ThreadBlockInVM tbivm(thread); // just in case target is involved in a safepoint
2761 os::naked_short_sleep(0);
2762 }
2763
2764 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: target thread is terminated");
2765
2766 // Now release the GC inducing thread - we have to re-resolve the external oop that
2767 // was passed in as GC may have occurred and we don't know if we can trust t->threadObj() now.
2768 oop original = JNIHandles::resolve_non_null(target_handle);
2769 java_lang_Thread::set_priority(original, ThreadPriority(NormPriority + 2));
2770
2771 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: GC has been initiated - checking threadObj:");
2772
2773 // The Java code should be creating garbage and triggering GC, which would potentially move
2774 // the threadObj oop. If the exiting thread is properly protected then its threadObj should
2775 // remain valid and equal to our initial target_handle. Loop a few times to give GC a chance to
2776 // kick in.
2777 for (int i = 0; i < 5; i++) {
2778 oop original = JNIHandles::resolve_non_null(target_handle);
2779 oop current = t->threadObj();
2780 if (original != current) {
2781 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: failed comparison on iteration %d", i);
2782 THROW_MSG(vmSymbols::java_lang_RuntimeException(), "Target thread oop has changed!");
2783 } else {
2784 tty->print_cr("WB_CheckThreadObjOfTerminatingThread: successful comparison on iteration %d", i);
2785 ThreadBlockInVM tbivm(thread);
2786 os::naked_short_sleep(50);
2787 }
2788 }
2789 WB_END
2790
2791 WB_ENTRY(void, WB_VerifyFrames(JNIEnv* env, jobject wb, jboolean log, jboolean update_map))
2792 ResourceMark rm; // for verify
2793 stringStream st;
2794 for (StackFrameStream fst(JavaThread::current(), update_map, true); !fst.is_done(); fst.next()) {
2795 frame* current_frame = fst.current();
2796 if (log) {
2797 current_frame->print_value_on(&st);
2798 }
2799 current_frame->verify(fst.register_map());
2800 }
2801 if (log) {
2802 tty->print_cr("[WhiteBox::VerifyFrames] Walking Frames");
2803 tty->print_raw(st.freeze());
2804 tty->print_cr("[WhiteBox::VerifyFrames] Done");
2805 }
2806 WB_END
2807
2808 WB_ENTRY(jboolean, WB_IsJVMTIIncluded(JNIEnv* env, jobject wb))
2809 #if INCLUDE_JVMTI
2810 return JNI_TRUE;
2811 #else
2812 return JNI_FALSE;
2813 #endif
2814 WB_END
2815
2816 WB_ENTRY(void, WB_WaitUnsafe(JNIEnv* env, jobject wb, jint time))
2817 os::naked_short_sleep(time);
2818 WB_END
2819
2820 WB_ENTRY(void, WB_BusyWaitCPUTime(JNIEnv* env, jobject wb, jint time))
2821 ThreadToNativeFromVM ttn(thread);
2822 u8 start = os::current_thread_cpu_time();
2823 u8 target_duration = time * (u8)1000000;
2824 while (os::current_thread_cpu_time() - start < target_duration) {
2825 for (volatile int i = 0; i < 1000000; i++);
2826 }
2827 WB_END
2828
2829 WB_ENTRY(jboolean, WB_CPUSamplerSetOutOfStackWalking(JNIEnv* env, jobject wb, jboolean enable))
2830 #if defined(ASSERT) && INCLUDE_JFR && defined(LINUX)
2831 return JfrCPUTimeThreadSampling::set_out_of_stack_walking_enabled(enable == JNI_TRUE) ? JNI_TRUE : JNI_FALSE;
2832 #else
2833 return JNI_FALSE;
2834 #endif
2835 WB_END
2836
2837 WB_ENTRY(jstring, WB_GetLibcName(JNIEnv* env, jobject o))
2838 ThreadToNativeFromVM ttn(thread);
2839 jstring info_string = env->NewStringUTF(XSTR(LIBC));
2840 CHECK_JNI_EXCEPTION_(env, nullptr);
2841 return info_string;
2842 WB_END
2843
2844 WB_ENTRY(void, WB_PinObject(JNIEnv* env, jobject wb, jobject o))
2845 #if INCLUDE_G1GC
2846 if (!UseG1GC) {
2847 ShouldNotReachHere();
2848 return;
2849 }
2850 oop obj = JNIHandles::resolve(o);
2851 G1CollectedHeap::heap()->pin_object(thread, obj);
2852 #else
2853 ShouldNotReachHere();
2854 #endif // INCLUDE_G1GC
2855 WB_END
2856
2857 WB_ENTRY(void, WB_UnpinObject(JNIEnv* env, jobject wb, jobject o))
2858 #if INCLUDE_G1GC
2859 if (!UseG1GC) {
2860 ShouldNotReachHere();
2861 return;
2862 }
2863 oop obj = JNIHandles::resolve(o);
2864 G1CollectedHeap::heap()->unpin_object(thread, obj);
2865 #else
2866 ShouldNotReachHere();
2867 #endif // INCLUDE_G1GC
2868 WB_END
2869
2870 WB_ENTRY(jboolean, WB_SetVirtualThreadsNotifyJvmtiMode(JNIEnv* env, jobject wb, jboolean enable))
2871 if (!Continuations::enabled()) {
2872 tty->print_cr("WB error: must be Continuations::enabled()!");
2873 return JNI_FALSE;
2874 }
2875 jboolean result = false;
2876 #if INCLUDE_JVMTI
2877 if (enable) {
2878 result = JvmtiEnvBase::enable_virtual_threads_notify_jvmti();
2879 } else {
2880 result = JvmtiEnvBase::disable_virtual_threads_notify_jvmti();
2881 }
2882 #endif
2883 return result;
2884 WB_END
2885
2886 WB_ENTRY(void, WB_PreTouchMemory(JNIEnv* env, jobject wb, jlong addr, jlong size))
2887 void* const from = (void*)addr;
2888 void* const to = (void*)(addr + size);
2889 if (from > to) {
2890 os::pretouch_memory(from, to, os::vm_page_size());
2891 }
2892 WB_END
2893
2894 WB_ENTRY(void, WB_CleanMetaspaces(JNIEnv* env, jobject target))
2895 ClassLoaderDataGraph::safepoint_and_clean_metaspaces();
2896 WB_END
2897
2898 // Reports resident set size (RSS) in bytes
2899 WB_ENTRY(jlong, WB_Rss(JNIEnv* env, jobject o))
2900 return os::rss();
2901 WB_END
2902
2903 WB_ENTRY(void, WB_ControlledCrash(JNIEnv* env, jobject o, jint how))
2904 #ifdef ASSERT
2905 VMError::controlled_crash(how);
2906 #else
2907 THROW_MSG(vmSymbols::java_lang_UnsupportedOperationException(), "Only available in debug builds");
2908 #endif
2909 WB_END
2910
2911 #define CC (char*)
2912
2913 static JNINativeMethod methods[] = {
2914 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
2915 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
2916 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
2917 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
2918 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
2919 {CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
2920 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
2921 {CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
2922 {CC"getHeapAlignment", CC"()J", (void*)&WB_GetHeapAlignment},
2923 {CC"countAliveClasses0", CC"(Ljava/lang/String;)I", (void*)&WB_CountAliveClasses },
2924 {CC"getSymbolRefcount", CC"(Ljava/lang/String;)I", (void*)&WB_GetSymbolRefcount },
2925 {CC"parseCommandLine0",
2926 CC"(Ljava/lang/String;C[Ljdk/test/whitebox/parser/DiagnosticCommand;)[Ljava/lang/Object;",
2927 (void*) &WB_ParseCommandLine
2928 },
2929 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2930 (void*)&WB_AddToBootstrapClassLoaderSearch},
2931 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
2932 (void*)&WB_AddToSystemClassLoaderSearch},
2933 {CC"getCompressedOopsMaxHeapSize", CC"()J",
2934 (void*)&WB_GetCompressedOopsMaxHeapSize},
2935 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
2936 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
2937 {CC"decodeNKlassAndAccessKlass",CC"(I)V", (void*)&WB_DecodeNKlassAndAccessKlass},
2938 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
2939 #if INCLUDE_CDS
2940 {CC"getCDSOffsetForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSOffsetForName},
2941 {CC"getCDSConstantForName0", CC"(Ljava/lang/String;)I", (void*)&WB_GetCDSConstantForName},
2942 #endif
2943 #if INCLUDE_G1GC
2944 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
2945 {CC"g1CompletedConcurrentMarkCycles", CC"()I", (void*)&WB_G1CompletedConcurrentMarkCycles},
2946 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
2947 {CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
2948 {CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
2949 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
2950 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
2951 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
2952 {CC"g1HasRegionsToUncommit", CC"()Z", (void*)&WB_G1HasRegionsToUncommit},
2953 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
2954 (void*)&WB_G1AuxiliaryMemoryUsage },
2955 {CC"g1ActiveMemoryNodeCount", CC"()I", (void*)&WB_G1ActiveMemoryNodeCount },
2956 {CC"g1MemoryNodeIds", CC"()[I", (void*)&WB_G1MemoryNodeIds },
2957 {CC"g1GetMixedGCInfo", CC"(I)[J", (void*)&WB_G1GetMixedGCInfo },
2958 #endif // INCLUDE_G1GC
2959 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
2960 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
2961 {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J", (void*)&WB_NMTMallocWithPseudoStackAndType},
2962 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
2963 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
2964 {CC"NMTAttemptReserveMemoryAt", CC"(JJ)J", (void*)&WB_NMTAttemptReserveMemoryAt },
2965 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
2966 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
2967 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
2968 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
2969 {CC"NMTNewArena", CC"(J)J", (void*)&WB_NMTNewArena },
2970 {CC"NMTFreeArena", CC"(J)V", (void*)&WB_NMTFreeArena },
2971 {CC"NMTArenaMalloc", CC"(JJ)V", (void*)&WB_NMTArenaMalloc },
2972 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
2973 {CC"isFrameDeoptimized", CC"(I)Z", (void*)&WB_IsFrameDeoptimized},
2974 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
2975 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
2976 (void*)&WB_DeoptimizeMethod },
2977 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
2978 (void*)&WB_IsMethodCompiled },
2979 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
2980 (void*)&WB_IsMethodCompilable},
2981 {CC"isMethodQueuedForCompilation0",
2982 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
2983 {CC"isIntrinsicAvailable0",
2984 CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
2985 (void*)&WB_IsIntrinsicAvailable},
2986 {CC"makeMethodNotCompilable0",
2987 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
2988 {CC"testSetDontInlineMethod0",
2989 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
2990 {CC"getMethodCompilationLevel0",
2991 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
2992 {CC"getMethodDecompileCount0",
2993 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodDecompileCount},
2994 {CC"getMethodTrapCount0",
2995 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
2996 (void*)&WB_GetMethodTrapCount},
2997 {CC"getDeoptCount0",
2998 CC"(Ljava/lang/String;Ljava/lang/String;)I", (void*)&WB_GetDeoptCount},
2999 {CC"getMethodEntryBci0",
3000 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
3001 {CC"getCompileQueueSize",
3002 CC"(I)I", (void*)&WB_GetCompileQueueSize},
3003 {CC"testSetForceInlineMethod0",
3004 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
3005 {CC"enqueueMethodForCompilation0",
3006 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
3007 {CC"enqueueInitializerForCompilation0",
3008 CC"(Ljava/lang/Class;I)Z", (void*)&WB_EnqueueInitializerForCompilation},
3009 {CC"markMethodProfiled",
3010 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_MarkMethodProfiled},
3011 {CC"clearMethodState0",
3012 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
3013 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
3014 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
3015 {CC"matchesMethod",
3016 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
3017 (void*)&WB_MatchesMethod},
3018 {CC"matchesInline",
3019 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
3020 (void*)&WB_MatchesInline},
3021 {CC"shouldPrintAssembly",
3022 CC"(Ljava/lang/reflect/Executable;I)Z",
3023 (void*)&WB_ShouldPrintAssembly},
3024
3025 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
3026 {CC"isDefaultVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsDefaultVMFlag},
3027 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
3028 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
3029 {CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
3030 {CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
3031 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
3032 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
3033 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
3034 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
3035 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
3036 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
3037 (void*)&WB_SetStringVMFlag},
3038 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
3039 (void*)&WB_GetBooleanVMFlag},
3040 {CC"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3041 (void*)&WB_GetIntVMFlag},
3042 {CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3043 (void*)&WB_GetUintVMFlag},
3044 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3045 (void*)&WB_GetIntxVMFlag},
3046 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3047 (void*)&WB_GetUintxVMFlag},
3048 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3049 (void*)&WB_GetUint64VMFlag},
3050 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
3051 (void*)&WB_GetSizeTVMFlag},
3052 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
3053 (void*)&WB_GetDoubleVMFlag},
3054 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
3055 (void*)&WB_GetStringVMFlag},
3056 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
3057 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
3058 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
3059 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
3060 {CC"allocateMetaspace",
3061 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
3062 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
3063 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
3064 {CC"metaspaceSharedRegionAlignment", CC"()J", (void*)&WB_AOTMetaspaceRegionAlignment },
3065 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
3066 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
3067 (void*)&WB_GetNMethod },
3068 {CC"relocateNMethodFromMethod0", CC"(Ljava/lang/reflect/Executable;I)V",
3069 (void*)&WB_RelocateNMethodFromMethod },
3070 {CC"relocateNMethodFromAddr", CC"(JI)V", (void*)&WB_RelocateNMethodFromAddr },
3071 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
3072 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
3073 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
3074 {CC"getCompilationActivityMode",
3075 CC"()I", (void*)&WB_GetCompilationActivityMode},
3076 {CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
3077 (void*)&WB_GetMethodData },
3078 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
3079 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
3080 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
3081 {CC"DefineModule", CC"(Ljava/lang/Object;ZLjava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
3082 (void*)&WB_DefineModule },
3083 {CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
3084 (void*)&WB_AddModuleExports },
3085 {CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
3086 (void*)&WB_AddReadsModule },
3087 {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
3088 (void*)&WB_AddModuleExportsToAllUnnamed },
3089 {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
3090 (void*)&WB_AddModuleExportsToAll },
3091 {CC"deflateIdleMonitors", CC"()Z", (void*)&WB_DeflateIdleMonitors },
3092 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
3093 {CC"isAsanEnabled", CC"()Z", (void*)&WB_IsAsanEnabled },
3094 {CC"isUbsanEnabled", CC"()Z", (void*)&WB_IsUbsanEnabled },
3095 {CC"getInUseMonitorCount", CC"()J", (void*)&WB_getInUseMonitorCount },
3096 {CC"getLockStackCapacity", CC"()I", (void*)&WB_getLockStackCapacity },
3097 {CC"supportsRecursiveLightweightLocking", CC"()Z", (void*)&WB_supportsRecursiveLightweightLocking },
3098 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
3099 {CC"forceClassLoaderStatsSafepoint", CC"()V", (void*)&WB_ForceClassLoaderStatsSafepoint },
3100 {CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
3101 {CC"getResolvedReferences0", CC"(Ljava/lang/Class;)[Ljava/lang/Object;", (void*)&WB_GetResolvedReferences},
3102 {CC"getObjectsViaKlassOopMaps0",
3103 CC"(Ljava/lang/Object;)[Ljava/lang/Object;", (void*)&WB_getObjectsViaKlassOopMaps},
3104 {CC"getObjectsViaOopIterator0",
3105 CC"(Ljava/lang/Object;)[Ljava/lang/Object;",(void*)&WB_getObjectsViaOopIterator},
3106 {CC"getObjectsViaFrameOopIterator",
3107 CC"(I)[Ljava/lang/Object;", (void*)&WB_getObjectsViaFrameOopIterator},
3108 {CC"getFieldEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getFieldEntriesLength},
3109 {CC"getFieldCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getFieldCPIndex},
3110 {CC"getMethodEntriesLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getMethodEntriesLength},
3111 {CC"getMethodCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getMethodCPIndex},
3112 {CC"getIndyInfoLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_getIndyInfoLength},
3113 {CC"getIndyCPIndex0", CC"(Ljava/lang/Class;I)I", (void*)&WB_getIndyCPIndex},
3114 {CC"printClasses0", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printClasses},
3115 {CC"printMethods0", CC"(Ljava/lang/String;Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_printMethods},
3116 {CC"getMethodBooleanOption",
3117 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
3118 (void*)&WB_GetMethodBooleaneOption},
3119 {CC"getMethodIntxOption",
3120 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
3121 (void*)&WB_GetMethodIntxOption},
3122 {CC"getMethodUintxOption",
3123 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
3124 (void*)&WB_GetMethodUintxOption},
3125 {CC"getMethodDoubleOption",
3126 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
3127 (void*)&WB_GetMethodDoubleOption},
3128 {CC"getMethodStringOption",
3129 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
3130 (void*)&WB_GetMethodStringOption},
3131 {CC"getDefaultArchivePath", CC"()Ljava/lang/String;",
3132 (void*)&WB_GetDefaultArchivePath},
3133 {CC"getCDSGenericHeaderMinVersion", CC"()I", (void*)&WB_GetCDSGenericHeaderMinVersion},
3134 {CC"getCurrentCDSVersion", CC"()I", (void*)&WB_GetCDSCurrentVersion},
3135 {CC"isSharingEnabled", CC"()Z", (void*)&WB_IsSharingEnabled},
3136 {CC"isSharedInternedString", CC"(Ljava/lang/String;)Z", (void*)&WB_IsSharedInternedString },
3137 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
3138 {CC"areSharedStringsMapped", CC"()Z", (void*)&WB_AreSharedStringsMapped },
3139 {CC"linkClass", CC"(Ljava/lang/Class;)V", (void*)&WB_LinkClass},
3140 {CC"areOpenArchiveHeapObjectsMapped", CC"()Z", (void*)&WB_AreOpenArchiveHeapObjectsMapped},
3141 {CC"isCDSIncluded", CC"()Z", (void*)&WB_IsCDSIncluded },
3142 {CC"isJFRIncluded", CC"()Z", (void*)&WB_IsJFRIncluded },
3143 {CC"isDTraceIncluded", CC"()Z", (void*)&WB_IsDTraceIncluded },
3144 {CC"hasLibgraal", CC"()Z", (void*)&WB_HasLibgraal },
3145 {CC"isC2OrJVMCIIncluded", CC"()Z", (void*)&WB_isC2OrJVMCIIncluded },
3146 {CC"isJVMCISupportedByGC", CC"()Z", (void*)&WB_IsJVMCISupportedByGC},
3147 {CC"canWriteJavaHeapArchive", CC"()Z", (void*)&WB_CanWriteJavaHeapArchive },
3148 {CC"cdsMemoryMappingFailed", CC"()Z", (void*)&WB_CDSMemoryMappingFailed },
3149
3150 {CC"clearInlineCaches0", CC"(Z)V", (void*)&WB_ClearInlineCaches },
3151 {CC"handshakeReadMonitors", CC"(Ljava/lang/Thread;)Z", (void*)&WB_HandshakeReadMonitors },
3152 {CC"handshakeWalkStack", CC"(Ljava/lang/Thread;Z)I", (void*)&WB_HandshakeWalkStack },
3153 {CC"asyncHandshakeWalkStack", CC"(Ljava/lang/Thread;)V", (void*)&WB_AsyncHandshakeWalkStack },
3154 {CC"lockAndBlock", CC"(Z)V", (void*)&WB_LockAndBlock},
3155 {CC"checkThreadObjOfTerminatingThread", CC"(Ljava/lang/Thread;)V", (void*)&WB_CheckThreadObjOfTerminatingThread },
3156 {CC"verifyFrames", CC"(ZZ)V", (void*)&WB_VerifyFrames },
3157 {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
3158 (void*)&WB_AddCompilerDirective },
3159 {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
3160 {CC"isGCSupported", CC"(I)Z", (void*)&WB_IsGCSupported},
3161 {CC"isGCSupportedByJVMCICompiler", CC"(I)Z", (void*)&WB_IsGCSupportedByJVMCICompiler},
3162 {CC"isGCSelected", CC"(I)Z", (void*)&WB_IsGCSelected},
3163 {CC"isGCSelectedErgonomically", CC"()Z", (void*)&WB_IsGCSelectedErgonomically},
3164 {CC"supportsConcurrentGCBreakpoints", CC"()Z", (void*)&WB_SupportsConcurrentGCBreakpoints},
3165 {CC"concurrentGCAcquireControl0", CC"()V", (void*)&WB_ConcurrentGCAcquireControl},
3166 {CC"concurrentGCReleaseControl0", CC"()V", (void*)&WB_ConcurrentGCReleaseControl},
3167 {CC"concurrentGCRunToIdle0", CC"()V", (void*)&WB_ConcurrentGCRunToIdle},
3168 {CC"concurrentGCRunTo0", CC"(Ljava/lang/String;)Z",
3169 (void*)&WB_ConcurrentGCRunTo},
3170 {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
3171 (void*)&WB_CheckLibSpecifiesNoexecstack},
3172 {CC"isContainerized", CC"()Z", (void*)&WB_IsContainerized },
3173 {CC"validateCgroup",
3174 CC"(ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
3175 (void*)&WB_ValidateCgroup },
3176 {CC"hostPhysicalMemory", CC"()J", (void*)&WB_HostPhysicalMemory },
3177 {CC"hostPhysicalSwap", CC"()J", (void*)&WB_HostPhysicalSwap },
3178 {CC"hostAvailableMemory", CC"()J", (void*)&WB_HostAvailableMemory },
3179 {CC"hostCPUs", CC"()I", (void*)&WB_HostCPUs },
3180 {CC"printOsInfo", CC"()V", (void*)&WB_PrintOsInfo },
3181 {CC"disableElfSectionCache", CC"()V", (void*)&WB_DisableElfSectionCache },
3182 {CC"resolvedMethodItemsCount", CC"()J", (void*)&WB_ResolvedMethodItemsCount },
3183 {CC"getKlassMetadataSize", CC"(Ljava/lang/Class;)I",(void*)&WB_GetKlassMetadataSize},
3184
3185 {CC"createMetaspaceTestContext", CC"(JJ)J", (void*)&WB_CreateMetaspaceTestContext},
3186 {CC"destroyMetaspaceTestContext", CC"(J)V", (void*)&WB_DestroyMetaspaceTestContext},
3187 {CC"purgeMetaspaceTestContext", CC"(J)V", (void*)&WB_PurgeMetaspaceTestContext},
3188 {CC"printMetaspaceTestContext", CC"(J)V", (void*)&WB_PrintMetaspaceTestContext},
3189 {CC"getTotalCommittedBytesInMetaspaceTestContext", CC"(J)J",(void*)&WB_GetTotalCommittedBytesInMetaspaceTestContext},
3190 {CC"getTotalUsedBytesInMetaspaceTestContext", CC"(J)J", (void*)&WB_GetTotalUsedBytesInMetaspaceTestContext},
3191 {CC"createArenaInTestContext", CC"(JZ)J", (void*)&WB_CreateArenaInTestContext},
3192 {CC"destroyMetaspaceTestArena", CC"(J)V", (void*)&WB_DestroyMetaspaceTestArena},
3193 {CC"allocateFromMetaspaceTestArena", CC"(JJ)J", (void*)&WB_AllocateFromMetaspaceTestArena},
3194 {CC"deallocateToMetaspaceTestArena", CC"(JJJ)V", (void*)&WB_DeallocateToMetaspaceTestArena},
3195 {CC"maxMetaspaceAllocationSize", CC"()J", (void*)&WB_GetMaxMetaspaceAllocationSize},
3196
3197 {CC"isJVMTIIncluded", CC"()Z", (void*)&WB_IsJVMTIIncluded},
3198 {CC"waitUnsafe", CC"(I)V", (void*)&WB_WaitUnsafe},
3199 {CC"busyWaitCPUTime", CC"(I)V", (void*)&WB_BusyWaitCPUTime},
3200 {CC"cpuSamplerSetOutOfStackWalking", CC"(Z)Z", (void*)&WB_CPUSamplerSetOutOfStackWalking},
3201 {CC"getLibcName", CC"()Ljava/lang/String;", (void*)&WB_GetLibcName},
3202
3203 {CC"pinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_PinObject},
3204 {CC"unpinObject", CC"(Ljava/lang/Object;)V", (void*)&WB_UnpinObject},
3205 {CC"setVirtualThreadsNotifyJvmtiMode", CC"(Z)Z", (void*)&WB_SetVirtualThreadsNotifyJvmtiMode},
3206 {CC"preTouchMemory", CC"(JJ)V", (void*)&WB_PreTouchMemory},
3207 {CC"cleanMetaspaces", CC"()V", (void*)&WB_CleanMetaspaces},
3208 {CC"rss", CC"()J", (void*)&WB_Rss},
3209 {CC"printString", CC"(Ljava/lang/String;I)Ljava/lang/String;", (void*)&WB_PrintString},
3210 {CC"lockAndStuckInSafepoint", CC"()V", (void*)&WB_TakeLockAndHangInSafepoint},
3211 {CC"wordSize", CC"()J", (void*)&WB_WordSize},
3212 {CC"rootChunkWordSize", CC"()J", (void*)&WB_RootChunkWordSize},
3213 {CC"isStatic", CC"()Z", (void*)&WB_IsStaticallyLinked},
3214 {CC"controlledCrash",CC"(I)V", (void*)&WB_ControlledCrash},
3215 };
3216
3217 #undef CC
3218
3219 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
3220 {
3221 if (WhiteBoxAPI) {
3222 // Make sure that wbclass is loaded by the null classloader
3223 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(wbclass));
3224 Handle loader(THREAD, ik->class_loader());
3225 if (loader.is_null()) {
3226 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
3227 WhiteBox::set_used();
3228 }
3229 }
3230 }
3231 JVM_END