1 /*
2 * Copyright (c) 2012, 2014, 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 <new>
28
29 #include "code/codeCache.hpp"
30 #include "memory/metadataFactory.hpp"
31 #include "memory/universe.hpp"
32 #include "oops/oop.inline.hpp"
33
34 #include "classfile/stringTable.hpp"
35 #include "classfile/classLoaderData.hpp"
36
37 #include "prims/whitebox.hpp"
38 #include "prims/wbtestmethods/parserTests.hpp"
39
40 #include "runtime/thread.hpp"
41 #include "runtime/arguments.hpp"
42 #include "runtime/deoptimization.hpp"
43 #include "runtime/interfaceSupport.hpp"
44 #include "runtime/os.hpp"
45 #include "runtime/vm_version.hpp"
46 #include "runtime/sweeper.hpp"
47
48 #include "utilities/array.hpp"
49 #include "utilities/debug.hpp"
50 #include "utilities/macros.hpp"
51 #include "utilities/exceptions.hpp"
52
53 #if INCLUDE_ALL_GCS
54 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
55 #include "gc_implementation/g1/concurrentMark.hpp"
56 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
57 #include "gc_implementation/g1/heapRegionRemSet.hpp"
58 #endif // INCLUDE_ALL_GCS
59
60 #if INCLUDE_NMT
61 #include "services/mallocSiteTable.hpp"
62 #include "services/memTracker.hpp"
63 #include "utilities/nativeCallStack.hpp"
64 #endif // INCLUDE_NMT
65
66 #include "compiler/compileBroker.hpp"
67 #include "jvmtifiles/jvmtiEnv.hpp"
68 #include "runtime/compilationPolicy.hpp"
69
70 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
71
72 #define SIZE_T_MAX_VALUE ((size_t) -1)
73
74 bool WhiteBox::_used = false;
75 volatile bool WhiteBox::compilation_locked = false;
76
77 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
78 return (jlong)(void*)JNIHandles::resolve(obj);
79 WB_END
80
81 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
82 return heapOopSize;
83 WB_END
84
85
86 class WBIsKlassAliveClosure : public KlassClosure {
87 Symbol* _name;
88 bool _found;
89 public:
90 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
91
92 void do_klass(Klass* k) {
93 if (_found) return;
94 Symbol* ksym = k->name();
95 if (ksym->fast_compare(_name) == 0) {
96 _found = true;
97 }
98 }
99
100 bool found() const {
101 return _found;
102 }
103 };
104
105 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
106 Handle h_name = JNIHandles::resolve(name);
107 if (h_name.is_null()) return false;
108 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
109 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
110
111 WBIsKlassAliveClosure closure(sym);
112 ClassLoaderDataGraph::classes_do(&closure);
113
114 return closure.found();
115 WB_END
116
117 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
118 #if INCLUDE_JVMTI
119 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
120 const char* seg = env->GetStringUTFChars(segment, NULL);
121 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
122 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
123 assert(err == JVMTI_ERROR_NONE, "must not fail");
124 env->ReleaseStringUTFChars(segment, seg);
125 #endif
126 }
127 WB_END
128
129 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
130 #if INCLUDE_JVMTI
131 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
132 const char* seg = env->GetStringUTFChars(segment, NULL);
133 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
134 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
135 assert(err == JVMTI_ERROR_NONE, "must not fail");
136 env->ReleaseStringUTFChars(segment, seg);
137 #endif
138 }
139 WB_END
140
141
142 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
143 return (jlong)Arguments::max_heap_for_compressed_oops();
144 }
145 WB_END
146
147 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
148 CollectorPolicy * p = Universe::heap()->collector_policy();
149 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
150 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
151 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
152 p->space_alignment(), p->heap_alignment());
153 }
154 WB_END
155
156 #ifndef PRODUCT
157 // Forward declaration
158 void TestReservedSpace_test();
159 void TestReserveMemorySpecial_test();
160 void TestVirtualSpace_test();
161 void TestMetaspaceAux_test();
162 #endif
163
164 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
165 #ifndef PRODUCT
166 TestReservedSpace_test();
167 TestReserveMemorySpecial_test();
168 TestVirtualSpace_test();
169 TestMetaspaceAux_test();
170 #endif
171 WB_END
172
173 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
174 size_t granularity = os::vm_allocation_granularity();
175 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
176 VirtualSpace vs;
177 vs.initialize(rhs, 50 * granularity);
178
179 //Check if constraints are complied
180 if (!( UseCompressedOops && rhs.base() != NULL &&
181 Universe::narrow_oop_base() != NULL &&
182 Universe::narrow_oop_use_implicit_null_checks() )) {
183 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
184 "\tUseCompressedOops is %d\n"
185 "\trhs.base() is "PTR_FORMAT"\n"
186 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
187 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
188 UseCompressedOops,
189 rhs.base(),
190 Universe::narrow_oop_base(),
191 Universe::narrow_oop_use_implicit_null_checks());
192 return;
193 }
194 tty->print_cr("Reading from no access area... ");
195 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
196 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
197 WB_END
198
199 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
200 size_t magnitude, size_t iterations) {
201 size_t granularity = os::vm_allocation_granularity();
202 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
203 VirtualSpace vs;
204 if (!vs.initialize(rhs, 0)) {
205 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
206 return 3;
207 }
208
209 long seed = os::random();
210 tty->print_cr("Random seed is %ld", seed);
211 os::init_random(seed);
212
213 for (size_t i = 0; i < iterations; i++) {
214
215 // Whether we will shrink or grow
216 bool shrink = os::random() % 2L == 0;
217
218 // Get random delta to resize virtual space
219 size_t delta = (size_t)os::random() % magnitude;
220
221 // If we are about to shrink virtual space below zero, then expand instead
222 if (shrink && vs.committed_size() < delta) {
223 shrink = false;
224 }
225
226 // Resizing by delta
227 if (shrink) {
228 vs.shrink_by(delta);
229 } else {
230 // If expanding fails expand_by will silently return false
231 vs.expand_by(delta, true);
232 }
233 }
234 return 0;
235 }
236
237 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
238 jlong reserved_space_size, jlong magnitude, jlong iterations))
239 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
240 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
241 iterations);
242 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
243 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
244 return 1;
245 }
246
247 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
248 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
249 if (sizeof(size_t) < sizeof(jlong)) {
250 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
251 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
252 || iterations > size_t_max_value) {
253 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
254 return 2;
255 }
256 }
257
258 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
259 (size_t) magnitude, (size_t) iterations);
260 WB_END
261
262 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
263 oop p = JNIHandles::resolve(obj);
264 #if INCLUDE_ALL_GCS
265 if (UseG1GC) {
266 G1CollectedHeap* g1 = G1CollectedHeap::heap();
267 const HeapRegion* hr = g1->heap_region_containing(p);
268 if (hr == NULL) {
269 return false;
270 }
271 return !(hr->is_young());
272 } else if (UseParallelGC) {
273 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
274 return !psh->is_in_young(p);
275 }
276 #endif // INCLUDE_ALL_GCS
277 GenCollectedHeap* gch = GenCollectedHeap::heap();
278 return !gch->is_in_young(p);
279 WB_END
280
281 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
282 oop p = JNIHandles::resolve(obj);
283 return p->size() * HeapWordSize;
284 WB_END
285
286 #if INCLUDE_ALL_GCS
287 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
288 G1CollectedHeap* g1 = G1CollectedHeap::heap();
289 oop result = JNIHandles::resolve(obj);
290 const HeapRegion* hr = g1->heap_region_containing(result);
291 return hr->is_humongous();
292 WB_END
293
294 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
295 G1CollectedHeap* g1 = G1CollectedHeap::heap();
296 size_t nr = g1->num_free_regions();
297 return (jlong)nr;
298 WB_END
299
300 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
301 G1CollectedHeap* g1 = G1CollectedHeap::heap();
302 ConcurrentMark* cm = g1->concurrent_mark();
303 return cm->concurrent_marking_in_progress();
304 WB_END
305
306 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
307 return (jint)HeapRegion::GrainBytes;
308 WB_END
309 #endif // INCLUDE_ALL_GCS
310
311 #if INCLUDE_NMT
312 // Alloc memory using the test memory type so that we can use that to see if
313 // NMT picks it up correctly
314 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
315 jlong addr = 0;
316 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
317 return addr;
318 WB_END
319
320 // Alloc memory with pseudo call stack. The test can create psudo malloc
321 // allocation site to stress the malloc tracking.
322 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
323 address pc = (address)(size_t)pseudo_stack;
324 NativeCallStack stack(&pc, 1);
325 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
326 WB_END
327
328 // Free the memory allocated by NMTAllocTest
329 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
330 os::free((void*)(uintptr_t)mem, mtTest);
331 WB_END
332
333 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
334 jlong addr = 0;
335
336 addr = (jlong)(uintptr_t)os::reserve_memory(size);
337 MemTracker::record_virtual_memory_type((address)addr, mtTest);
338
339 return addr;
340 WB_END
341
342 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
343 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
344 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
345 WB_END
346
347 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
348 os::uncommit_memory((char *)(uintptr_t)addr, size);
349 WB_END
350
351 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
352 os::release_memory((char *)(uintptr_t)addr, size);
353 WB_END
354
355 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
356 return MemTracker::tracking_level() == NMT_detail;
357 WB_END
358
359 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
360 // Test that we can downgrade NMT levels but not upgrade them.
361 if (MemTracker::tracking_level() == NMT_off) {
362 MemTracker::transition_to(NMT_off);
363 return MemTracker::tracking_level() == NMT_off;
364 } else {
365 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
366 MemTracker::transition_to(NMT_summary);
367 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
368
369 // Can't go to detail once NMT is set to summary.
370 MemTracker::transition_to(NMT_detail);
371 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
372
373 // Shutdown sets tracking level to minimal.
374 MemTracker::shutdown();
375 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
376
377 // Once the tracking level is minimal, we cannot increase to summary.
378 // The code ignores this request instead of asserting because if the malloc site
379 // table overflows in another thread, it tries to change the code to summary.
380 MemTracker::transition_to(NMT_summary);
381 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
382
383 // Really can never go up to detail, verify that the code would never do this.
384 MemTracker::transition_to(NMT_detail);
385 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
386 return MemTracker::tracking_level() == NMT_minimal;
387 }
388 WB_END
389
390 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
391 int hash_size = MallocSiteTable::hash_buckets();
392 assert(hash_size > 0, "NMT hash_size should be > 0");
393 return (jint)hash_size;
394 WB_END
395 #endif // INCLUDE_NMT
396
397 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
398 assert(method != NULL, "method should not be null");
399 ThreadToNativeFromVM ttn(thread);
400 return env->FromReflectedMethod(method);
401 }
402
403 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
404 MutexLockerEx mu(Compile_lock);
405 CodeCache::mark_all_nmethods_for_deoptimization();
406 VM_Deoptimize op;
407 VMThread::execute(&op);
408 WB_END
409
410 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
411 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
412 int result = 0;
413 CHECK_JNI_EXCEPTION_(env, result);
414 MutexLockerEx mu(Compile_lock);
415 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
416 if (is_osr) {
417 result += mh->mark_osr_nmethods();
418 } else if (mh->code() != NULL) {
419 mh->code()->mark_for_deoptimization();
420 ++result;
421 }
422 result += CodeCache::mark_for_deoptimization(mh());
423 if (result > 0) {
424 VM_Deoptimize op;
425 VMThread::execute(&op);
426 }
427 return result;
428 WB_END
429
430 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
431 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
432 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
433 MutexLockerEx mu(Compile_lock);
434 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
435 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
436 if (code == NULL) {
437 return JNI_FALSE;
438 }
439 return (code->is_alive() && !code->is_marked_for_deoptimization());
440 WB_END
441
442 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
443 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
444 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
445 MutexLockerEx mu(Compile_lock);
446 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
447 if (is_osr) {
448 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
449 } else {
450 return CompilationPolicy::can_be_compiled(mh, comp_level);
451 }
452 WB_END
453
454 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
455 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
456 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
457 MutexLockerEx mu(Compile_lock);
458 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
459 return mh->queued_for_compilation();
460 WB_END
461
462 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
463 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
464 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
465 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
466 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
467 return (code != NULL ? code->comp_level() : CompLevel_none);
468 WB_END
469
470 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
471 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
472 CHECK_JNI_EXCEPTION(env);
473 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
474 if (is_osr) {
475 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
476 } else {
477 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
478 }
479 WB_END
480
481 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
482 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
483 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
484 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
485 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
486 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
487 WB_END
488
489 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
490 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
491 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
492 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
493 bool result = mh->dont_inline();
494 mh->set_dont_inline(value == JNI_TRUE);
495 return result;
496 WB_END
497
498 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
499 if (comp_level == CompLevel_any) {
500 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
501 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
502 } else {
503 return CompileBroker::queue_size(comp_level);
504 }
505 WB_END
506
507 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
508 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
509 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
510 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
511 bool result = mh->force_inline();
512 mh->set_force_inline(value == JNI_TRUE);
513 return result;
514 WB_END
515
516 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
517 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
518 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
519 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
520 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
521 MutexLockerEx mu(Compile_lock);
522 return (mh->queued_for_compilation() || nm != NULL);
523 WB_END
524
525 class VM_WhiteBoxOperation : public VM_Operation {
526 public:
527 VM_WhiteBoxOperation() { }
528 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
529 bool allow_nested_vm_operations() const { return true; }
530 };
531
532 class AlwaysFalseClosure : public BoolObjectClosure {
533 public:
534 bool do_object_b(oop p) { return false; }
535 };
536
537 static AlwaysFalseClosure always_false;
538
539 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
540 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
541 CHECK_JNI_EXCEPTION(env);
542 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
543 MutexLockerEx mu(Compile_lock);
544 MethodData* mdo = mh->method_data();
545 MethodCounters* mcs = mh->method_counters();
546
547 if (mdo != NULL) {
548 mdo->init();
549 ResourceMark rm;
550 int arg_count = mdo->method()->size_of_parameters();
551 for (int i = 0; i < arg_count; i++) {
552 mdo->set_arg_modified(i, 0);
553 }
554 MutexLockerEx mu(mdo->extra_data_lock());
555 mdo->clean_method_data(&always_false);
556 }
557
558 mh->clear_not_c1_compilable();
559 mh->clear_not_c2_compilable();
560 mh->clear_not_c2_osr_compilable();
561 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
562 if (mcs != NULL) {
563 mcs->backedge_counter()->init();
564 mcs->invocation_counter()->init();
565 mcs->set_interpreter_invocation_count(0);
566 mcs->set_interpreter_throwout_count(0);
567
568 #ifdef TIERED
569 mcs->set_rate(0.0F);
570 mh->set_prev_event_count(0);
571 mh->set_prev_time(0);
572 #endif
573 }
574 WB_END
575
576 template <typename T>
577 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
578 if (name == NULL) {
579 return false;
580 }
581 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
582 const char* flag_name = env->GetStringUTFChars(name, NULL);
583 bool result = (*TAt)(flag_name, value, true, true);
584 env->ReleaseStringUTFChars(name, flag_name);
585 return result;
586 }
587
588 template <typename T>
589 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
590 if (name == NULL) {
591 return false;
592 }
593 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
594 const char* flag_name = env->GetStringUTFChars(name, NULL);
595 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
596 env->ReleaseStringUTFChars(name, flag_name);
597 return result;
598 }
599
600 template <typename T>
601 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
602 ResourceMark rm(thread);
603 jclass clazz = env->FindClass(name->as_C_string());
604 CHECK_JNI_EXCEPTION_(env, NULL);
605 jmethodID methodID = env->GetStaticMethodID(clazz,
606 vmSymbols::valueOf_name()->as_C_string(),
607 sig->as_C_string());
608 CHECK_JNI_EXCEPTION_(env, NULL);
609 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
610 CHECK_JNI_EXCEPTION_(env, NULL);
611 return result;
612 }
613
614 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
615 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
616 }
617 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
618 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
619 }
620 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
621 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
622 }
623 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
624 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
625 }*/
626 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
627 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
628 }
629
630 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
631 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
632 const char* flag_name = env->GetStringUTFChars(name, NULL);
633 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
634 env->ReleaseStringUTFChars(name, flag_name);
635 return result;
636 }
637
638 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
639 Flag* flag = getVMFlag(thread, env, name);
640 return (flag != NULL) && flag->is_constant_in_binary();
641 WB_END
642
643 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
644 Flag* flag = getVMFlag(thread, env, name);
645 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
646 WB_END
647
648 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
649 bool result;
650 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
651 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
652 return booleanBox(thread, env, result);
653 }
654 return NULL;
655 WB_END
656
657 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
658 intx result;
659 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
660 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
661 return longBox(thread, env, result);
662 }
663 return NULL;
664 WB_END
665
666 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
667 uintx result;
668 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
669 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
670 return longBox(thread, env, result);
671 }
672 return NULL;
673 WB_END
674
675 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
676 uint64_t result;
677 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
678 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
679 return longBox(thread, env, result);
680 }
681 return NULL;
682 WB_END
683
684 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
685 uintx result;
686 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
687 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
688 return longBox(thread, env, result);
689 }
690 return NULL;
691 WB_END
692
693 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
694 double result;
695 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
696 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
697 return doubleBox(thread, env, result);
698 }
699 return NULL;
700 WB_END
701
702 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
703 ccstr ccstrResult;
704 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
705 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
706 jstring result = env->NewStringUTF(ccstrResult);
707 CHECK_JNI_EXCEPTION_(env, NULL);
708 return result;
709 }
710 return NULL;
711 WB_END
712
713 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
714 bool result = value == JNI_TRUE ? true : false;
715 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
716 WB_END
717
718 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
719 intx result = value;
720 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
721 WB_END
722
723 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
724 uintx result = value;
725 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
726 WB_END
727
728 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
729 uint64_t result = value;
730 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
731 WB_END
732
733 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
734 size_t result = value;
735 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
736 WB_END
737
738 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
739 double result = value;
740 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
741 WB_END
742
743 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
744 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
745 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
746 ccstr ccstrResult = ccstrValue;
747 bool needFree;
748 {
749 ThreadInVMfromNative ttvfn(thread); // back to VM
750 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
751 }
752 if (value != NULL) {
753 env->ReleaseStringUTFChars(value, ccstrValue);
754 }
755 if (needFree) {
756 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
757 }
758 WB_END
759
760
761 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
762 WhiteBox::compilation_locked = true;
763 WB_END
764
765 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
766 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
767 WhiteBox::compilation_locked = false;
768 mo.notify_all();
769 WB_END
770
771 void WhiteBox::force_sweep() {
772 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
773 {
774 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
775 NMethodSweeper::_should_sweep = true;
776 }
777 NMethodSweeper::possibly_sweep();
778 }
779
780 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
781 WhiteBox::force_sweep();
782 WB_END
783
784 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
785 ResourceMark rm(THREAD);
786 int len;
787 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
788 return (StringTable::lookup(name, len) != NULL);
789 WB_END
790
791 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
792 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
793 Universe::heap()->collect(GCCause::_last_ditch_collection);
794 #if INCLUDE_ALL_GCS
795 if (UseG1GC) {
796 // Needs to be cleared explicitly for G1
797 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
798 }
799 #endif // INCLUDE_ALL_GCS
800 WB_END
801
802 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
803 Universe::heap()->collect(GCCause::_wb_young_gc);
804 WB_END
805
806 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
807 // static+volatile in order to force the read to happen
808 // (not be eliminated by the compiler)
809 static char c;
810 static volatile char* p;
811
812 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
813 if (p == NULL) {
814 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
815 }
816
817 c = *p;
818 WB_END
819
820 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
821 const char* cpu_features = VM_Version::cpu_features();
822 ThreadToNativeFromVM ttn(thread);
823 jstring features_string = env->NewStringUTF(cpu_features);
824
825 CHECK_JNI_EXCEPTION_(env, NULL);
826
827 return features_string;
828 WB_END
829
830 int WhiteBox::get_blob_type(const CodeBlob* code) {
831 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
832 return CodeCache::get_code_heap(code)->code_blob_type();
833 }
834
835 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
836 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
837 return CodeCache::get_code_heap(blob_type);
838 }
839
840 struct CodeBlobStub {
841 CodeBlobStub(const CodeBlob* blob) :
842 name(os::strdup(blob->name())),
843 size(blob->size()),
844 blob_type(WhiteBox::get_blob_type(blob)) { }
845 ~CodeBlobStub() { os::free((void*) name); }
846 const char* const name;
847 const int size;
848 const int blob_type;
849 };
850
851 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
852 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
853 CHECK_JNI_EXCEPTION_(env, NULL);
854 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
855
856 jstring name = env->NewStringUTF(cb->name);
857 CHECK_JNI_EXCEPTION_(env, NULL);
858 env->SetObjectArrayElement(result, 0, name);
859
860 jobject obj = integerBox(thread, env, cb->size);
861 CHECK_JNI_EXCEPTION_(env, NULL);
862 env->SetObjectArrayElement(result, 1, obj);
863
864 obj = integerBox(thread, env, cb->blob_type);
865 CHECK_JNI_EXCEPTION_(env, NULL);
866 env->SetObjectArrayElement(result, 2, obj);
867
868 return result;
869 }
870
871 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
872 ResourceMark rm(THREAD);
873 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
874 CHECK_JNI_EXCEPTION_(env, NULL);
875 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
876 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
877 jobjectArray result = NULL;
878 if (code == NULL) {
879 return result;
880 }
881 int insts_size = code->insts_size();
882
883 ThreadToNativeFromVM ttn(thread);
884 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
885 CHECK_JNI_EXCEPTION_(env, NULL);
886 result = env->NewObjectArray(4, clazz, NULL);
887 if (result == NULL) {
888 return result;
889 }
890
891 CodeBlobStub stub(code);
892 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
893 env->SetObjectArrayElement(result, 0, codeBlob);
894
895 jobject level = integerBox(thread, env, code->comp_level());
896 CHECK_JNI_EXCEPTION_(env, NULL);
897 env->SetObjectArrayElement(result, 1, level);
898
899 jbyteArray insts = env->NewByteArray(insts_size);
900 CHECK_JNI_EXCEPTION_(env, NULL);
901 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
902 env->SetObjectArrayElement(result, 2, insts);
903
904 jobject id = integerBox(thread, env, code->compile_id());
905 CHECK_JNI_EXCEPTION_(env, NULL);
906 env->SetObjectArrayElement(result, 3, id);
907
908 return result;
909 WB_END
910
911 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
912 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
913 BufferBlob* blob;
914 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
915 if (full_size < size) {
916 full_size += round_to(size - full_size, oopSize);
917 }
918 {
919 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
920 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
921 }
922 // Track memory usage statistic after releasing CodeCache_lock
923 MemoryService::track_code_cache_memory_usage();
924 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
925 return blob;
926 }
927
928 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
929 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
930 WB_END
931
932 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
933 BufferBlob::free((BufferBlob*) addr);
934 WB_END
935
936 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
937 ResourceMark rm;
938 GrowableArray<CodeBlobStub*> blobs;
939 {
940 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
941 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
942 if (heap == NULL) {
943 return NULL;
944 }
945 for (CodeBlob* cb = (CodeBlob*) heap->first();
946 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
947 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
948 new (stub) CodeBlobStub(cb);
949 blobs.append(stub);
950 }
951 }
952 if (blobs.length() == 0) {
953 return NULL;
954 }
955 ThreadToNativeFromVM ttn(thread);
956 jobjectArray result = NULL;
957 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
958 CHECK_JNI_EXCEPTION_(env, NULL);
959 result = env->NewObjectArray(blobs.length(), clazz, NULL);
960 if (result == NULL) {
961 return result;
962 }
963 int i = 0;
964 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
965 it != blobs.end(); ++it) {
966 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
967 env->SetObjectArrayElement(result, i, obj);
968 ++i;
969 }
970 return result;
971 WB_END
972
973 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
974 return (jlong) Thread::current()->stack_size();
975 WB_END
976
977 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
978 JavaThread* t = JavaThread::current();
979 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
980 WB_END
981
982 int WhiteBox::array_bytes_to_length(size_t bytes) {
983 return Array<u1>::bytes_to_length(bytes);
984 }
985
986 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
987 if (size < 0) {
988 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
989 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
990 }
991
992 oop class_loader_oop = JNIHandles::resolve(class_loader);
993 ClassLoaderData* cld = class_loader_oop != NULL
994 ? java_lang_ClassLoader::loader_data(class_loader_oop)
995 : ClassLoaderData::the_null_class_loader_data();
996
997 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
998
999 return (jlong)(uintptr_t)metadata;
1000 WB_END
1001
1002 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1003 oop class_loader_oop = JNIHandles::resolve(class_loader);
1004 ClassLoaderData* cld = class_loader_oop != NULL
1005 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1006 : ClassLoaderData::the_null_class_loader_data();
1007
1008 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1009 WB_END
1010
1011 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1012 if (inc < 0) {
1013 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1014 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1015 }
1016
1017 jlong max_size_t = (jlong) ((size_t) -1);
1018 if (inc > max_size_t) {
1019 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1020 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1021 }
1022
1023 size_t new_cap_until_GC = 0;
1024 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1025 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1026 if (!success) {
1027 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1028 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1029 "due to contention with another thread");
1030 }
1031 return (jlong) new_cap_until_GC;
1032 WB_END
1033
1034 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1035 return (jlong) MetaspaceGC::capacity_until_GC();
1036 WB_END
1037
1038 //Some convenience methods to deal with objects from java
1039 int WhiteBox::offset_for_field(const char* field_name, oop object,
1040 Symbol* signature_symbol) {
1041 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1042 Thread* THREAD = Thread::current();
1043
1044 //Get the class of our object
1045 Klass* arg_klass = object->klass();
1046 //Turn it into an instance-klass
1047 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1048
1049 //Create symbols to look for in the class
1050 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1051 THREAD);
1052
1053 //To be filled in with an offset of the field we're looking for
1054 fieldDescriptor fd;
1055
1056 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1057 if (res == NULL) {
1058 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1059 name_symbol->as_C_string());
1060 fatal("Invalid layout of preloaded class");
1061 }
1062
1063 //fetch the field at the offset we've found
1064 int dest_offset = fd.offset();
1065
1066 return dest_offset;
1067 }
1068
1069
1070 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1071 int offset = offset_for_field(field_name, object,
1072 vmSymbols::string_signature());
1073 oop string = object->obj_field(offset);
1074 if (string == NULL) {
1075 return NULL;
1076 }
1077 const char* ret = java_lang_String::as_utf8_string(string);
1078 return ret;
1079 }
1080
1081 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1082 int offset =
1083 offset_for_field(field_name, object, vmSymbols::bool_signature());
1084 bool ret = (object->bool_field(offset) == JNI_TRUE);
1085 return ret;
1086 }
1087
1088 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1089 ResourceMark rm;
1090 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1091
1092 // one by one registration natives for exception catching
1093 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1094 CHECK_JNI_EXCEPTION(env);
1095 for (int i = 0, n = method_count; i < n; ++i) {
1096 // Skip dummy entries
1097 if (method_array[i].fnPtr == NULL) continue;
1098 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1099 jthrowable throwable_obj = env->ExceptionOccurred();
1100 if (throwable_obj != NULL) {
1101 env->ExceptionClear();
1102 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1103 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1104 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1105 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1106 method_array[i].name, method_array[i].signature);
1107 }
1108 } else {
1109 // Registration failed unexpectedly.
1110 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1111 method_array[i].name, method_array[i].signature);
1112 env->UnregisterNatives(wbclass);
1113 break;
1114 }
1115 }
1116 }
1117 }
1118
1119 #define CC (char*)
1120
1121 static JNINativeMethod methods[] = {
1122 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1123 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1124 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1125 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1126 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1127 {CC"parseCommandLine",
1128 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1129 (void*) &WB_ParseCommandLine
1130 },
1131 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V",
1132 (void*)&WB_AddToBootstrapClassLoaderSearch},
1133 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V",
1134 (void*)&WB_AddToSystemClassLoaderSearch},
1135 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1136 (void*)&WB_GetCompressedOopsMaxHeapSize},
1137 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1138 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1139 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1140 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1141 #if INCLUDE_ALL_GCS
1142 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1143 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1144 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1145 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1146 #endif // INCLUDE_ALL_GCS
1147 #if INCLUDE_NMT
1148 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1149 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1150 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1151 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1152 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1153 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1154 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1155 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1156 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1157 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1158 #endif // INCLUDE_NMT
1159 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1160 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1161 (void*)&WB_DeoptimizeMethod },
1162 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1163 (void*)&WB_IsMethodCompiled },
1164 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1165 (void*)&WB_IsMethodCompilable},
1166 {CC"isMethodQueuedForCompilation",
1167 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1168 {CC"makeMethodNotCompilable",
1169 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1170 {CC"testSetDontInlineMethod",
1171 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1172 {CC"getMethodCompilationLevel",
1173 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1174 {CC"getMethodEntryBci",
1175 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1176 {CC"getCompileQueueSize",
1177 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1178 {CC"testSetForceInlineMethod",
1179 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1180 {CC"enqueueMethodForCompilation",
1181 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1182 {CC"clearMethodState",
1183 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1184 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1185 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1186 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1187 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1188 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1189 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1190 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1191 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1192 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1193 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1194 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1195 (void*)&WB_SetStringVMFlag},
1196 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1197 (void*)&WB_GetBooleanVMFlag},
1198 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1199 (void*)&WB_GetIntxVMFlag},
1200 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1201 (void*)&WB_GetUintxVMFlag},
1202 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1203 (void*)&WB_GetUint64VMFlag},
1204 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1205 (void*)&WB_GetSizeTVMFlag},
1206 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1207 (void*)&WB_GetDoubleVMFlag},
1208 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1209 (void*)&WB_GetStringVMFlag},
1210 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1211 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1212 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1213 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1214 {CC"allocateMetaspace",
1215 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1216 {CC"freeMetaspace",
1217 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1218 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1219 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1220 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1221 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1222 (void*)&WB_GetNMethod },
1223 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
1224 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1225 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1226 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1227 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1228 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1229 };
1230
1231 #undef CC
1232
1233 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1234 {
1235 if (WhiteBoxAPI) {
1236 // Make sure that wbclass is loaded by the null classloader
1237 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1238 Handle loader(ikh->class_loader());
1239 if (loader.is_null()) {
1240 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1241 WhiteBox::register_extended(env, wbclass, thread);
1242 WhiteBox::set_used();
1243 }
1244 }
1245 }
1246 JVM_END