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