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