1 /*
2 * Copyright (c) 2012, 2019, 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 "precompiled.hpp"
26
27 #include "memory/metadataFactory.hpp"
28 #include "memory/metaspaceShared.hpp"
29 #include "memory/iterator.hpp"
30 #include "memory/universe.hpp"
31 #include "oops/oop.inline.hpp"
32
33 #include "classfile/symbolTable.hpp"
34 #include "classfile/classLoaderData.hpp"
35
36 #include "prims/whitebox.hpp"
37 #include "prims/wbtestmethods/parserTests.hpp"
38
39 #include "runtime/arguments.hpp"
40 #include "runtime/interfaceSupport.hpp"
41 #include "runtime/os.hpp"
42 #include "utilities/array.hpp"
43 #include "utilities/align.hpp"
44 #include "utilities/debug.hpp"
45 #include "utilities/macros.hpp"
46 #include "utilities/exceptions.hpp"
47
48 #if INCLUDE_ALL_GCS
49 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
50 #include "gc_implementation/g1/concurrentMark.hpp"
51 #include "gc_implementation/g1/concurrentMarkThread.hpp"
52 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
53 #include "gc_implementation/g1/heapRegionRemSet.hpp"
54 #endif // INCLUDE_ALL_GCS
55
56 #if INCLUDE_NMT
57 #include "services/mallocSiteTable.hpp"
58 #include "services/memTracker.hpp"
59 #include "utilities/nativeCallStack.hpp"
60 #endif // INCLUDE_NMT
61
62 #include "compiler/compileBroker.hpp"
63 #include "jvmtifiles/jvmtiEnv.hpp"
64 #include "runtime/compilationPolicy.hpp"
65
66 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
67
68 #define SIZE_T_MAX_VALUE ((size_t) -1)
69
70 bool WhiteBox::_used = false;
71
72 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
73 return (jlong)(void*)JNIHandles::resolve(obj);
74 WB_END
75
76 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
77 return heapOopSize;
78 WB_END
79
80 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
81 return os::vm_page_size();
82 WB_END
83
84 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
85 return os::large_page_size();
86 WB_END
87
88 class WBIsKlassAliveClosure : public KlassClosure {
89 Symbol* _name;
90 bool _found;
91 public:
92 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
93
94 void do_klass(Klass* k) {
95 if (_found) return;
96 Symbol* ksym = k->name();
97 if (ksym->fast_compare(_name) == 0) {
98 _found = true;
99 }
100 }
101
102 bool found() const {
103 return _found;
104 }
105 };
106
107 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
108 Handle h_name = JNIHandles::resolve(name);
109 if (h_name.is_null()) return false;
110 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
111 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
112
113 WBIsKlassAliveClosure closure(sym);
114 ClassLoaderDataGraph::classes_do(&closure);
115
116 return closure.found();
117 WB_END
118
119 WB_ENTRY(jboolean, WB_ClassKnownToNotExist(JNIEnv* env, jobject o, jobject loader, jstring name))
120 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
121 const char* class_name = env->GetStringUTFChars(name, NULL);
122 jboolean result = JVM_KnownToNotExist(env, loader, class_name);
123 env->ReleaseStringUTFChars(name, class_name);
124 return result;
125 WB_END
126
127 WB_ENTRY(jobjectArray, WB_GetLookupCacheURLs(JNIEnv* env, jobject o, jobject loader))
128 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
129 return JVM_GetResourceLookupCacheURLs(env, loader);
130 WB_END
131
132 WB_ENTRY(jintArray, WB_GetLookupCacheMatches(JNIEnv* env, jobject o, jobject loader, jstring name))
133 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
134 const char* resource_name = env->GetStringUTFChars(name, NULL);
135 jintArray result = JVM_GetResourceLookupCache(env, loader, resource_name);
136
137 env->ReleaseStringUTFChars(name, resource_name);
138 return result;
139 WB_END
140
141 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
142 #if INCLUDE_JVMTI
143 ResourceMark rm;
144 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
145 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
146 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
147 assert(err == JVMTI_ERROR_NONE, "must not fail");
148 #endif
149 }
150 WB_END
151
152 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
153 #if INCLUDE_JVMTI
154 ResourceMark rm;
155 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
156 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
157 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
158 assert(err == JVMTI_ERROR_NONE, "must not fail");
159 #endif
160 }
161 WB_END
162
163 #ifdef LINUX
164 #include "utilities/elfFile.hpp"
165 #include "osContainer_linux.hpp"
166 #endif
167
168 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
169 return (jlong)Arguments::max_heap_for_compressed_oops();
170 }
171 WB_END
172
173 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
174 CollectorPolicy * p = Universe::heap()->collector_policy();
175 gclog_or_tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
176 SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
177 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
178 p->space_alignment(), p->heap_alignment());
179 }
180 WB_END
181
182 #ifndef PRODUCT
183 // Forward declaration
184 void TestReservedSpace_test();
185 void TestReserveMemorySpecial_test();
186 void TestVirtualSpace_test();
187 void TestMetaspaceAux_test();
188 #endif
189
190 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
191 #ifndef PRODUCT
192 TestReservedSpace_test();
193 TestReserveMemorySpecial_test();
194 TestVirtualSpace_test();
195 TestMetaspaceAux_test();
196 #endif
197 WB_END
198
199 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
200 size_t granularity = os::vm_allocation_granularity();
201 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
202 VirtualSpace vs;
203 vs.initialize(rhs, 50 * granularity);
204
205 //Check if constraints are complied
206 if (!( UseCompressedOops && rhs.base() != NULL &&
207 Universe::narrow_oop_base() != NULL &&
208 Universe::narrow_oop_use_implicit_null_checks() )) {
209 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
210 "\tUseCompressedOops is %d\n"
211 "\trhs.base() is " PTR_FORMAT "\n"
212 "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
213 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
214 UseCompressedOops,
215 rhs.base(),
216 Universe::narrow_oop_base(),
217 Universe::narrow_oop_use_implicit_null_checks());
218 return;
219 }
220 tty->print_cr("Reading from no access area... ");
221 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
222 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
223 WB_END
224
225 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
226 size_t magnitude, size_t iterations) {
227 size_t granularity = os::vm_allocation_granularity();
228 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
229 VirtualSpace vs;
230 if (!vs.initialize(rhs, 0)) {
231 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
232 return 3;
233 }
234
235 long seed = os::random();
236 tty->print_cr("Random seed is %ld", seed);
237 os::init_random(seed);
238
239 for (size_t i = 0; i < iterations; i++) {
240
241 // Whether we will shrink or grow
242 bool shrink = os::random() % 2L == 0;
243
244 // Get random delta to resize virtual space
245 size_t delta = (size_t)os::random() % magnitude;
246
247 // If we are about to shrink virtual space below zero, then expand instead
248 if (shrink && vs.committed_size() < delta) {
249 shrink = false;
250 }
251
252 // Resizing by delta
253 if (shrink) {
254 vs.shrink_by(delta);
255 } else {
256 // If expanding fails expand_by will silently return false
257 vs.expand_by(delta, true);
258 }
259 }
260 return 0;
261 }
262
263 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
264 jlong reserved_space_size, jlong magnitude, jlong iterations))
265 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
266 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
267 iterations);
268 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
269 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
270 return 1;
271 }
272
273 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
274 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
275 if (sizeof(size_t) < sizeof(jlong)) {
276 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
277 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
278 || iterations > size_t_max_value) {
279 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
280 return 2;
281 }
282 }
283
284 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
285 (size_t) magnitude, (size_t) iterations);
286 WB_END
287
288 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
289 oop p = JNIHandles::resolve(obj);
290 #if INCLUDE_ALL_GCS
291 if (UseG1GC) {
292 G1CollectedHeap* g1 = G1CollectedHeap::heap();
293 const HeapRegion* hr = g1->heap_region_containing(p);
294 if (hr == NULL) {
295 return false;
296 }
297 return !(hr->is_young());
298 } else if (UseParallelGC) {
299 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
300 return !psh->is_in_young(p);
301 }
302 #endif // INCLUDE_ALL_GCS
303 GenCollectedHeap* gch = GenCollectedHeap::heap();
304 return !gch->is_in_young(p);
305 WB_END
306
307 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
308 oop p = JNIHandles::resolve(obj);
309 return p->size() * HeapWordSize;
310 WB_END
311
312 #if INCLUDE_ALL_GCS
313 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
314 G1CollectedHeap* g1 = G1CollectedHeap::heap();
315 oop result = JNIHandles::resolve(obj);
316 const HeapRegion* hr = g1->heap_region_containing(result);
317 return hr->isHumongous();
318 WB_END
319
320 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
321 G1CollectedHeap* g1 = G1CollectedHeap::heap();
322 size_t nr = g1->max_regions();
323 return (jlong)nr;
324 WB_END
325
326 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
327 G1CollectedHeap* g1 = G1CollectedHeap::heap();
328 size_t nr = g1->num_free_regions();
329 return (jlong)nr;
330 WB_END
331
332 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
333 G1CollectedHeap* g1 = G1CollectedHeap::heap();
334 return g1->concurrent_mark()->cmThread()->during_cycle();
335 WB_END
336
337 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
338 G1CollectedHeap* g1h = G1CollectedHeap::heap();
339 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
340 g1h->collect(GCCause::_wb_conc_mark);
341 return true;
342 }
343 return false;
344 WB_END
345
346 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
347 return (jint)HeapRegion::GrainBytes;
348 WB_END
349
350 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
351 ResourceMark rm(THREAD);
352 G1CollectedHeap* g1h = G1CollectedHeap::heap();
353 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
354 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
355 return JNIHandles::make_local(env, h());
356 WB_END
357 #endif // INCLUDE_ALL_GCS
358
359 #if INCLUDE_NMT
360 // Alloc memory using the test memory type so that we can use that to see if
361 // NMT picks it up correctly
362 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
363 jlong addr = 0;
364 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
365 return addr;
366 WB_END
367
368 // Alloc memory with pseudo call stack. The test can create psudo malloc
369 // allocation site to stress the malloc tracking.
370 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
371 address pc = (address)(size_t)pseudo_stack;
372 NativeCallStack stack(&pc, 1);
373 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
374 WB_END
375
376 // Alloc memory with pseudo call stack and specific memory type.
377 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStackAndType(JNIEnv* env, jobject o, jlong size, jint pseudo_stack, jint type))
378 address pc = (address)(size_t)pseudo_stack;
379 NativeCallStack stack(&pc, 1);
380 return (jlong)(uintptr_t)os::malloc(size, (MEMFLAGS)type, stack);
381 WB_END
382
383 // Free the memory allocated by NMTAllocTest
384 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
385 os::free((void*)(uintptr_t)mem, mtTest);
386 WB_END
387
388 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
389 jlong addr = 0;
390
391 addr = (jlong)(uintptr_t)os::reserve_memory(size);
392 MemTracker::record_virtual_memory_type((address)addr, mtTest);
393
394 return addr;
395 WB_END
396
397
398 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
399 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
400 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
401 WB_END
402
403 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
404 os::uncommit_memory((char *)(uintptr_t)addr, size);
405 WB_END
406
407 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
408 os::release_memory((char *)(uintptr_t)addr, size);
409 WB_END
410
411 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
412 return MemTracker::tracking_level() == NMT_detail;
413 WB_END
414
415 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
416 // Test that we can downgrade NMT levels but not upgrade them.
417 if (MemTracker::tracking_level() == NMT_off) {
418 MemTracker::transition_to(NMT_off);
419 return MemTracker::tracking_level() == NMT_off;
420 } else {
421 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
422 MemTracker::transition_to(NMT_summary);
423 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
424
425 // Can't go to detail once NMT is set to summary.
426 MemTracker::transition_to(NMT_detail);
427 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
428
429 // Shutdown sets tracking level to minimal.
430 MemTracker::shutdown();
431 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
432
433 // Once the tracking level is minimal, we cannot increase to summary.
434 // The code ignores this request instead of asserting because if the malloc site
435 // table overflows in another thread, it tries to change the code to summary.
436 MemTracker::transition_to(NMT_summary);
437 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
438
439 // Really can never go up to detail, verify that the code would never do this.
440 MemTracker::transition_to(NMT_detail);
441 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
442 return MemTracker::tracking_level() == NMT_minimal;
443 }
444 WB_END
445
446 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
447 int hash_size = MallocSiteTable::hash_buckets();
448 assert(hash_size > 0, "NMT hash_size should be > 0");
449 return (jint)hash_size;
450 WB_END
451 #endif // INCLUDE_NMT
452
453 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
454 assert(method != NULL, "method should not be null");
455 ThreadToNativeFromVM ttn(thread);
456 return env->FromReflectedMethod(method);
457 }
458
459 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
460 MutexLockerEx mu(Compile_lock);
461 CodeCache::mark_all_nmethods_for_deoptimization();
462 VM_Deoptimize op;
463 VMThread::execute(&op);
464 WB_END
465
466 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
467 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
468 int result = 0;
469 CHECK_JNI_EXCEPTION_(env, result);
470 MutexLockerEx mu(Compile_lock);
471 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
472 if (is_osr) {
473 result += mh->mark_osr_nmethods();
474 } else if (mh->code() != NULL) {
475 mh->code()->mark_for_deoptimization();
476 ++result;
477 }
478 result += CodeCache::mark_for_deoptimization(mh());
479 if (result > 0) {
480 VM_Deoptimize op;
481 VMThread::execute(&op);
482 }
483 return result;
484 WB_END
485
486 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
487 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
488 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
489 MutexLockerEx mu(Compile_lock);
490 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
491 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
492 if (code == NULL) {
493 return JNI_FALSE;
494 }
495 return (code->is_alive() && !code->is_marked_for_deoptimization());
496 WB_END
497
498 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
499 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
500 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
501 MutexLockerEx mu(Compile_lock);
502 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
503 if (is_osr) {
504 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
505 } else {
506 return CompilationPolicy::can_be_compiled(mh, comp_level);
507 }
508 WB_END
509
510 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
511 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
512 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
513 MutexLockerEx mu(Compile_lock);
514 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
515 return mh->queued_for_compilation();
516 WB_END
517
518 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
519 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
520 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
521 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
522 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
523 return (code != NULL ? code->comp_level() : CompLevel_none);
524 WB_END
525
526 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
527 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
528 CHECK_JNI_EXCEPTION(env);
529 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
530 if (is_osr) {
531 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
532 } else {
533 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
534 }
535 WB_END
536
537 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
538 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
539 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
540 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
541 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
542 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
543 WB_END
544
545 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
546 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
547 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
548 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
549 bool result = mh->dont_inline();
550 mh->set_dont_inline(value == JNI_TRUE);
551 return result;
552 WB_END
553
554 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
555 if (comp_level == CompLevel_any) {
556 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
557 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
558 } else {
559 return CompileBroker::queue_size(comp_level);
560 }
561 WB_END
562
563 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
564 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
565 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
566 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
567 bool result = mh->force_inline();
568 mh->set_force_inline(value == JNI_TRUE);
569 return result;
570 WB_END
571
572 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
573 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
574 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
575 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
576 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
577 MutexLockerEx mu(Compile_lock);
578 return (mh->queued_for_compilation() || nm != NULL);
579 WB_END
580
581 class VM_WhiteBoxOperation : public VM_Operation {
582 public:
583 VM_WhiteBoxOperation() { }
584 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
585 bool allow_nested_vm_operations() const { return true; }
586 };
587
588 static AlwaysFalseClosure always_false;
589
590 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation {
591 public:
592 VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { }
593 void doit() {
594 _mdo->clean_method_data(&always_false);
595 }
596 private:
597 MethodData* _mdo;
598 };
599
600 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
601 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
602 CHECK_JNI_EXCEPTION(env);
603 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
604 MutexLockerEx mu(Compile_lock);
605 MethodData* mdo = mh->method_data();
606 MethodCounters* mcs = mh->method_counters();
607
608 if (mdo != NULL) {
609 mdo->init();
610 ResourceMark rm;
611 int arg_count = mdo->method()->size_of_parameters();
612 for (int i = 0; i < arg_count; i++) {
613 mdo->set_arg_modified(i, 0);
614 }
615 VM_WhiteBoxCleanMethodData op(mdo);
616 VMThread::execute(&op);
617 }
618
619 mh->clear_not_c1_compilable();
620 mh->clear_not_c2_compilable();
621 mh->clear_not_c2_osr_compilable();
622 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
623 if (mcs != NULL) {
624 mcs->backedge_counter()->init();
625 mcs->invocation_counter()->init();
626 mcs->set_interpreter_invocation_count(0);
627 mcs->set_interpreter_throwout_count(0);
628
629 #ifdef TIERED
630 mcs->set_rate(0.0F);
631 mh->set_prev_event_count(0);
632 mh->set_prev_time(0);
633 #endif
634 }
635 WB_END
636
637 WB_ENTRY(void, WB_MarkMethodProfiled(JNIEnv* env, jobject o, jobject method))
638 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
639 CHECK_JNI_EXCEPTION(env);
640 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
641
642 MethodData* mdo = mh->method_data();
643 if (mdo == NULL) {
644 Method::build_interpreter_method_data(mh, CHECK_AND_CLEAR);
645 mdo = mh->method_data();
646 }
647 mdo->init();
648 InvocationCounter* icnt = mdo->invocation_counter();
649 InvocationCounter* bcnt = mdo->backedge_counter();
650 // set i-counter according to AdvancedThresholdPolicy::is_method_profiled
651 // because SimpleThresholdPolicy::call_predicate_helper uses > in jdk8u, that's why we need to plus one.
652 icnt->set(InvocationCounter::wait_for_compile, Tier4MinInvocationThreshold + 1);
653 bcnt->set(InvocationCounter::wait_for_compile, Tier4CompileThreshold + 1);
654 WB_END
655
656 template <typename T>
657 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
658 if (name == NULL) {
659 return false;
660 }
661 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
662 const char* flag_name = env->GetStringUTFChars(name, NULL);
663 bool result = (*TAt)(flag_name, value, true, true);
664 env->ReleaseStringUTFChars(name, flag_name);
665 return result;
666 }
667
668 template <typename T>
669 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
670 if (name == NULL) {
671 return false;
672 }
673 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
674 const char* flag_name = env->GetStringUTFChars(name, NULL);
675 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
676 env->ReleaseStringUTFChars(name, flag_name);
677 return result;
678 }
679
680 template <typename T>
681 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
682 ResourceMark rm(thread);
683 jclass clazz = env->FindClass(name->as_C_string());
684 CHECK_JNI_EXCEPTION_(env, NULL);
685 jmethodID methodID = env->GetStaticMethodID(clazz,
686 vmSymbols::valueOf_name()->as_C_string(),
687 sig->as_C_string());
688 CHECK_JNI_EXCEPTION_(env, NULL);
689 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
690 CHECK_JNI_EXCEPTION_(env, NULL);
691 return result;
692 }
693
694 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
695 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
696 }
697 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
698 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
699 }
700 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
701 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
702 }
703 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
704 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
705 }*/
706 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
707 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
708 }
709
710 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
711 bool result;
712 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
713 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
714 return booleanBox(thread, env, result);
715 }
716 return NULL;
717 WB_END
718
719 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
720 intx result;
721 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
722 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
723 return longBox(thread, env, result);
724 }
725 return NULL;
726 WB_END
727
728 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
729 uintx result;
730 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
731 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
732 return longBox(thread, env, result);
733 }
734 return NULL;
735 WB_END
736
737 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
738 uint64_t result;
739 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
740 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
741 return longBox(thread, env, result);
742 }
743 return NULL;
744 WB_END
745
746 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
747 double result;
748 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
749 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
750 return doubleBox(thread, env, result);
751 }
752 return NULL;
753 WB_END
754
755 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
756 ccstr ccstrResult;
757 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
758 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
759 jstring result = env->NewStringUTF(ccstrResult);
760 CHECK_JNI_EXCEPTION_(env, NULL);
761 return result;
762 }
763 return NULL;
764 WB_END
765
766 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
767 bool result = value == JNI_TRUE ? true : false;
768 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
769 WB_END
770
771 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
772 intx result = value;
773 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
774 WB_END
775
776 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
777 uintx result = value;
778 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
779 WB_END
780
781 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
782 uint64_t result = value;
783 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
784 WB_END
785
786 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
787 double result = value;
788 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
789 WB_END
790
791 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
792 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
793 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
794 ccstr ccstrResult = ccstrValue;
795 bool needFree;
796 {
797 ThreadInVMfromNative ttvfn(thread); // back to VM
798 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
799 }
800 if (value != NULL) {
801 env->ReleaseStringUTFChars(value, ccstrValue);
802 }
803 if (needFree) {
804 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
805 }
806 WB_END
807
808
809 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
810 ResourceMark rm(THREAD);
811 int len;
812 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
813 return (StringTable::lookup(name, len) != NULL);
814 WB_END
815
816 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
817 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
818 Universe::heap()->collect(GCCause::_last_ditch_collection);
819 #if INCLUDE_ALL_GCS
820 if (UseG1GC) {
821 // Needs to be cleared explicitly for G1
822 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
823 }
824 #endif // INCLUDE_ALL_GCS
825 WB_END
826
827 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
828 Universe::heap()->collect(GCCause::_wb_young_gc);
829 WB_END
830
831 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
832 // static+volatile in order to force the read to happen
833 // (not be eliminated by the compiler)
834 static char c;
835 static volatile char* p;
836
837 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
838 if (p == NULL) {
839 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
840 }
841
842 c = *p;
843 WB_END
844
845 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
846 const char* cpu_features = VM_Version::cpu_features();
847 ThreadToNativeFromVM ttn(thread);
848 jstring features_string = env->NewStringUTF(cpu_features);
849
850 CHECK_JNI_EXCEPTION_(env, NULL);
851
852 return features_string;
853 WB_END
854
855 int WhiteBox::get_blob_type(const CodeBlob* code) {
856 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
857 return CodeBlobType::All;;
858 }
859
860 struct CodeBlobStub {
861 CodeBlobStub(const CodeBlob* blob) :
862 name(os::strdup(blob->name())),
863 size(blob->size()),
864 blob_type(WhiteBox::get_blob_type(blob)),
865 address((jlong) blob) { }
866 ~CodeBlobStub() { os::free((void*) name); }
867 const char* const name;
868 const jint size;
869 const jint blob_type;
870 const jlong address;
871 };
872
873 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
874 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
875 CHECK_JNI_EXCEPTION_(env, NULL);
876 jobjectArray result = env->NewObjectArray(4, clazz, NULL);
877
878 jstring name = env->NewStringUTF(cb->name);
879 CHECK_JNI_EXCEPTION_(env, NULL);
880 env->SetObjectArrayElement(result, 0, name);
881
882 jobject obj = integerBox(thread, env, cb->size);
883 CHECK_JNI_EXCEPTION_(env, NULL);
884 env->SetObjectArrayElement(result, 1, obj);
885
886 obj = integerBox(thread, env, cb->blob_type);
887 CHECK_JNI_EXCEPTION_(env, NULL);
888 env->SetObjectArrayElement(result, 2, obj);
889
890 obj = longBox(thread, env, cb->address);
891 CHECK_JNI_EXCEPTION_(env, NULL);
892 env->SetObjectArrayElement(result, 3, obj);
893
894 return result;
895 }
896
897 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
898 ResourceMark rm(THREAD);
899 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
900 CHECK_JNI_EXCEPTION_(env, NULL);
901 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
902 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
903 jobjectArray result = NULL;
904 if (code == NULL) {
905 return result;
906 }
907 int insts_size = code->insts_size();
908
909 ThreadToNativeFromVM ttn(thread);
910 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
911 CHECK_JNI_EXCEPTION_(env, NULL);
912 result = env->NewObjectArray(3, clazz, NULL);
913 if (result == NULL) {
914 return result;
915 }
916
917 jobject level = integerBox(thread, env, code->comp_level());
918 CHECK_JNI_EXCEPTION_(env, NULL);
919 env->SetObjectArrayElement(result, 0, level);
920
921 jobject id = integerBox(thread, env, code->compile_id());
922 CHECK_JNI_EXCEPTION_(env, NULL);
923 env->SetObjectArrayElement(result, 1, id);
924
925 jbyteArray insts = env->NewByteArray(insts_size);
926 CHECK_JNI_EXCEPTION_(env, NULL);
927 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
928 env->SetObjectArrayElement(result, 2, insts);
929
930 return result;
931 WB_END
932
933 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
934 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
935 BufferBlob* blob;
936 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
937 if (full_size < size) {
938 full_size += align_up(size - full_size, oopSize);
939 }
940 {
941 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
942 blob = (BufferBlob*) CodeCache::allocate(full_size);
943 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
944 }
945 // Track memory usage statistic after releasing CodeCache_lock
946 MemoryService::track_code_cache_memory_usage();
947 return blob;
948 }
949
950 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
951 if (size < 0) {
952 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
953 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
954 }
955 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
956 WB_END
957
958 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
959 if (addr == 0) {
960 return;
961 }
962 BufferBlob::free((BufferBlob*) addr);
963 WB_END
964
965 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
966 if (addr == 0) {
967 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
968 "WB_GetCodeBlob: addr is null");
969 }
970 ThreadToNativeFromVM ttn(thread);
971 CodeBlobStub stub((CodeBlob*) addr);
972 return codeBlob2objectArray(thread, env, &stub);
973 WB_END
974
975 int WhiteBox::array_bytes_to_length(size_t bytes) {
976 return Array<u1>::bytes_to_length(bytes);
977 }
978
979 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
980 if (size < 0) {
981 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
982 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
983 }
984
985 oop class_loader_oop = JNIHandles::resolve(class_loader);
986 ClassLoaderData* cld = class_loader_oop != NULL
987 ? java_lang_ClassLoader::loader_data(class_loader_oop)
988 : ClassLoaderData::the_null_class_loader_data();
989
990 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
991
992 return (jlong)(uintptr_t)metadata;
993 WB_END
994
995 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
996 oop class_loader_oop = JNIHandles::resolve(class_loader);
997 ClassLoaderData* cld = class_loader_oop != NULL
998 ? java_lang_ClassLoader::loader_data(class_loader_oop)
999 : ClassLoaderData::the_null_class_loader_data();
1000
1001 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1002 WB_END
1003
1004 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1005 if (inc < 0) {
1006 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1007 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1008 }
1009
1010 jlong max_size_t = (jlong) ((size_t) -1);
1011 if (inc > max_size_t) {
1012 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1013 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1014 }
1015
1016 size_t new_cap_until_GC = 0;
1017 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1018 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1019 if (!success) {
1020 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1021 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1022 "due to contention with another thread");
1023 }
1024 return (jlong) new_cap_until_GC;
1025 WB_END
1026
1027 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1028 return (jlong) MetaspaceGC::capacity_until_GC();
1029 WB_END
1030
1031 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1032 return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1033 WB_END
1034
1035 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1036 oop obj_oop = JNIHandles::resolve(obj);
1037 return (jboolean) obj_oop->mark()->has_monitor();
1038 WB_END
1039
1040 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1041 VM_ForceSafepoint force_safepoint_op;
1042 VMThread::execute(&force_safepoint_op);
1043 WB_END
1044
1045 //Some convenience methods to deal with objects from java
1046 int WhiteBox::offset_for_field(const char* field_name, oop object,
1047 Symbol* signature_symbol) {
1048 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1049 Thread* THREAD = Thread::current();
1050
1051 //Get the class of our object
1052 Klass* arg_klass = object->klass();
1053 //Turn it into an instance-klass
1054 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1055
1056 //Create symbols to look for in the class
1057 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1058 THREAD);
1059
1060 //To be filled in with an offset of the field we're looking for
1061 fieldDescriptor fd;
1062
1063 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1064 if (res == NULL) {
1065 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1066 name_symbol->as_C_string());
1067 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
1068 }
1069
1070 //fetch the field at the offset we've found
1071 int dest_offset = fd.offset();
1072
1073 return dest_offset;
1074 }
1075
1076
1077 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1078 int offset = offset_for_field(field_name, object,
1079 vmSymbols::string_signature());
1080 oop string = object->obj_field(offset);
1081 if (string == NULL) {
1082 return NULL;
1083 }
1084 const char* ret = java_lang_String::as_utf8_string(string);
1085 return ret;
1086 }
1087
1088 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1089 int offset =
1090 offset_for_field(field_name, object, vmSymbols::bool_signature());
1091 bool ret = (object->bool_field(offset) == JNI_TRUE);
1092 return ret;
1093 }
1094
1095 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1096 ResourceMark rm;
1097 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1098
1099 // one by one registration natives for exception catching
1100 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1101 CHECK_JNI_EXCEPTION(env);
1102 for (int i = 0, n = method_count; i < n; ++i) {
1103 // Skip dummy entries
1104 if (method_array[i].fnPtr == NULL) continue;
1105 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1106 jthrowable throwable_obj = env->ExceptionOccurred();
1107 if (throwable_obj != NULL) {
1108 env->ExceptionClear();
1109 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1110 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1111 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1112 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1113 method_array[i].name, method_array[i].signature);
1114 }
1115 } else {
1116 // Registration failed unexpectedly.
1117 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1118 method_array[i].name, method_array[i].signature);
1119 env->UnregisterNatives(wbclass);
1120 break;
1121 }
1122 }
1123 }
1124 }
1125
1126 // Checks that the library libfile has the noexecstack bit set.
1127 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile))
1128 jboolean ret = false;
1129 #ifdef LINUX
1130 // Can't be in VM when we call JNI.
1131 ThreadToNativeFromVM ttnfv(thread);
1132 const char* lf = env->GetStringUTFChars(libfile, NULL);
1133 CHECK_JNI_EXCEPTION_(env, 0);
1134 ElfFile ef(lf);
1135 ret = (jboolean) ef.specifies_noexecstack();
1136 env->ReleaseStringUTFChars(libfile, lf);
1137 #endif
1138 return ret;
1139 WB_END
1140
1141 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o))
1142 LINUX_ONLY(return OSContainer::is_containerized();)
1143 return false;
1144 WB_END
1145
1146 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o))
1147 os::print_os_info(tty);
1148 WB_END
1149
1150 #define CC (char*)
1151
1152 static JNINativeMethod methods[] = {
1153 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1154 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1155 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1156 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1157 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1158 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
1159 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1160 {CC"classKnownToNotExist",
1161 CC"(Ljava/lang/ClassLoader;Ljava/lang/String;)Z",(void*)&WB_ClassKnownToNotExist},
1162 {CC"getLookupCacheURLs", CC"(Ljava/lang/ClassLoader;)[Ljava/net/URL;", (void*)&WB_GetLookupCacheURLs},
1163 {CC"getLookupCacheMatches", CC"(Ljava/lang/ClassLoader;Ljava/lang/String;)[I",
1164 (void*)&WB_GetLookupCacheMatches},
1165 {CC"parseCommandLine",
1166 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1167 (void*) &WB_ParseCommandLine
1168 },
1169 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V",
1170 (void*)&WB_AddToBootstrapClassLoaderSearch},
1171 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V",
1172 (void*)&WB_AddToSystemClassLoaderSearch},
1173 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1174 (void*)&WB_GetCompressedOopsMaxHeapSize},
1175 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1176 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1177 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1178 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1179 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
1180 #if INCLUDE_ALL_GCS
1181 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1182 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1183 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
1184 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1185 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1186 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1187 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1188 (void*)&WB_G1AuxiliaryMemoryUsage },
1189 #endif // INCLUDE_ALL_GCS
1190 #if INCLUDE_NMT
1191 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1192 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1193 {CC"NMTMallocWithPseudoStackAndType", CC"(JII)J", (void*)&WB_NMTMallocWithPseudoStackAndType},
1194 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1195 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1196 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1197 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1198 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1199 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1200 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1201 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1202 #endif // INCLUDE_NMT
1203 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1204 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1205 (void*)&WB_DeoptimizeMethod },
1206 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1207 (void*)&WB_IsMethodCompiled },
1208 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1209 (void*)&WB_IsMethodCompilable},
1210 {CC"isMethodQueuedForCompilation",
1211 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1212 {CC"makeMethodNotCompilable",
1213 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1214 {CC"testSetDontInlineMethod",
1215 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1216 {CC"getMethodCompilationLevel",
1217 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1218 {CC"getMethodEntryBci",
1219 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1220 {CC"getCompileQueueSize",
1221 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1222 {CC"testSetForceInlineMethod",
1223 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1224 {CC"enqueueMethodForCompilation",
1225 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1226 {CC"clearMethodState",
1227 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1228 {CC"markMethodProfiled",
1229 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_MarkMethodProfiled},
1230 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1231 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1232 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1233 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1234 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1235 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1236 (void*)&WB_SetStringVMFlag},
1237 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1238 (void*)&WB_GetBooleanVMFlag},
1239 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1240 (void*)&WB_GetIntxVMFlag},
1241 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1242 (void*)&WB_GetUintxVMFlag},
1243 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1244 (void*)&WB_GetUint64VMFlag},
1245 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1246 (void*)&WB_GetDoubleVMFlag},
1247 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1248 (void*)&WB_GetStringVMFlag},
1249 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1250 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1251 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1252 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1253 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1254 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1255 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1256 {CC"allocateMetaspace",
1257 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1258 {CC"freeMetaspace",
1259 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1260 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1261 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1262 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1263 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1264 (void*)&WB_GetNMethod },
1265 {CC"isMonitorInflated", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1266 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1267 {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z",
1268 (void*)&WB_CheckLibSpecifiesNoexecstack},
1269 {CC"isContainerized", CC"()Z", (void*)&WB_IsContainerized },
1270 {CC"printOsInfo", CC"()V", (void*)&WB_PrintOsInfo },
1271 };
1272
1273 #undef CC
1274
1275 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1276 {
1277 if (WhiteBoxAPI) {
1278 // Make sure that wbclass is loaded by the null classloader
1279 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1280 Handle loader(ikh->class_loader());
1281 if (loader.is_null()) {
1282 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1283 WhiteBox::register_extended(env, wbclass, thread);
1284 WhiteBox::set_used();
1285 }
1286 }
1287 }
1288 JVM_END