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