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