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