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 #include "runtime/javaCalls.hpp"
48
49 #include "utilities/array.hpp"
50 #include "utilities/debug.hpp"
51 #include "utilities/macros.hpp"
52 #include "utilities/exceptions.hpp"
53
54 #if INCLUDE_ALL_GCS
55 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
56 #include "gc_implementation/g1/concurrentMark.hpp"
57 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
58 #include "gc_implementation/g1/heapRegionRemSet.hpp"
59 #endif // INCLUDE_ALL_GCS
60
61 #if INCLUDE_NMT
62 #include "services/mallocSiteTable.hpp"
63 #include "services/memTracker.hpp"
64 #include "utilities/nativeCallStack.hpp"
65 #endif // INCLUDE_NMT
66
67 #include "compiler/compileBroker.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(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
118 return (jlong)Arguments::max_heap_for_compressed_oops();
119 }
120 WB_END
121
122 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
123 CollectorPolicy * p = Universe::heap()->collector_policy();
124 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
125 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
126 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
127 p->space_alignment(), p->heap_alignment());
128 }
129 WB_END
130
131 #ifndef PRODUCT
132 // Forward declaration
133 void TestReservedSpace_test();
134 void TestReserveMemorySpecial_test();
135 void TestVirtualSpace_test();
136 void TestMetaspaceAux_test();
137 #endif
138
139 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
140 #ifndef PRODUCT
141 TestReservedSpace_test();
142 TestReserveMemorySpecial_test();
143 TestVirtualSpace_test();
144 TestMetaspaceAux_test();
145 #endif
146 WB_END
147
148 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
149 size_t granularity = os::vm_allocation_granularity();
150 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
151 VirtualSpace vs;
152 vs.initialize(rhs, 50 * granularity);
153
154 //Check if constraints are complied
155 if (!( UseCompressedOops && rhs.base() != NULL &&
156 Universe::narrow_oop_base() != NULL &&
157 Universe::narrow_oop_use_implicit_null_checks() )) {
158 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
159 "\tUseCompressedOops is %d\n"
160 "\trhs.base() is "PTR_FORMAT"\n"
161 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
162 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
163 UseCompressedOops,
164 rhs.base(),
165 Universe::narrow_oop_base(),
166 Universe::narrow_oop_use_implicit_null_checks());
167 return;
168 }
169 tty->print_cr("Reading from no access area... ");
170 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
171 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
172 WB_END
173
174 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
175 size_t magnitude, size_t iterations) {
176 size_t granularity = os::vm_allocation_granularity();
177 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
178 VirtualSpace vs;
179 if (!vs.initialize(rhs, 0)) {
180 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
181 return 3;
182 }
183
184 long seed = os::random();
185 tty->print_cr("Random seed is %ld", seed);
186 os::init_random(seed);
187
188 for (size_t i = 0; i < iterations; i++) {
189
190 // Whether we will shrink or grow
191 bool shrink = os::random() % 2L == 0;
192
193 // Get random delta to resize virtual space
194 size_t delta = (size_t)os::random() % magnitude;
195
196 // If we are about to shrink virtual space below zero, then expand instead
197 if (shrink && vs.committed_size() < delta) {
198 shrink = false;
199 }
200
201 // Resizing by delta
202 if (shrink) {
203 vs.shrink_by(delta);
204 } else {
205 // If expanding fails expand_by will silently return false
206 vs.expand_by(delta, true);
207 }
208 }
209 return 0;
210 }
211
212 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
213 jlong reserved_space_size, jlong magnitude, jlong iterations))
214 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
215 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
216 iterations);
217 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
218 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
219 return 1;
220 }
221
222 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
223 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
224 if (sizeof(size_t) < sizeof(jlong)) {
225 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
226 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
227 || iterations > size_t_max_value) {
228 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
229 return 2;
230 }
231 }
232
233 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
234 (size_t) magnitude, (size_t) iterations);
235 WB_END
236
237 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
238 oop p = JNIHandles::resolve(obj);
239 #if INCLUDE_ALL_GCS
240 if (UseG1GC) {
241 G1CollectedHeap* g1 = G1CollectedHeap::heap();
242 const HeapRegion* hr = g1->heap_region_containing(p);
243 if (hr == NULL) {
244 return false;
245 }
246 return !(hr->is_young());
247 } else if (UseParallelGC) {
248 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
249 return !psh->is_in_young(p);
250 }
251 #endif // INCLUDE_ALL_GCS
252 GenCollectedHeap* gch = GenCollectedHeap::heap();
253 return !gch->is_in_young(p);
254 WB_END
255
256 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
257 oop p = JNIHandles::resolve(obj);
258 return p->size() * HeapWordSize;
259 WB_END
260
261 #if INCLUDE_ALL_GCS
262 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
263 G1CollectedHeap* g1 = G1CollectedHeap::heap();
264 oop result = JNIHandles::resolve(obj);
265 const HeapRegion* hr = g1->heap_region_containing(result);
266 return hr->is_humongous();
267 WB_END
268
269 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
270 G1CollectedHeap* g1 = G1CollectedHeap::heap();
271 size_t nr = g1->num_free_regions();
272 return (jlong)nr;
273 WB_END
274
275 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
276 G1CollectedHeap* g1 = G1CollectedHeap::heap();
277 ConcurrentMark* cm = g1->concurrent_mark();
278 return cm->concurrent_marking_in_progress();
279 WB_END
280
281 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
282 return (jint)HeapRegion::GrainBytes;
283 WB_END
284 #endif // INCLUDE_ALL_GCS
285
286 #if INCLUDE_NMT
287 // Alloc memory using the test memory type so that we can use that to see if
288 // NMT picks it up correctly
289 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
290 jlong addr = 0;
291 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
292 return addr;
293 WB_END
294
295 // Alloc memory with pseudo call stack. The test can create psudo malloc
296 // allocation site to stress the malloc tracking.
297 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
298 address pc = (address)(size_t)pseudo_stack;
299 NativeCallStack stack(&pc, 1);
300 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
301 WB_END
302
303 // Free the memory allocated by NMTAllocTest
304 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
305 os::free((void*)(uintptr_t)mem, mtTest);
306 WB_END
307
308 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
309 jlong addr = 0;
310
311 addr = (jlong)(uintptr_t)os::reserve_memory(size);
312 MemTracker::record_virtual_memory_type((address)addr, mtTest);
313
314 return addr;
315 WB_END
316
317 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
318 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
319 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
320 WB_END
321
322 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
323 os::uncommit_memory((char *)(uintptr_t)addr, size);
324 WB_END
325
326 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
327 os::release_memory((char *)(uintptr_t)addr, size);
328 WB_END
329
330 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
331 return MemTracker::tracking_level() == NMT_detail;
332 WB_END
333
334 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
335 // Test that we can downgrade NMT levels but not upgrade them.
336 if (MemTracker::tracking_level() == NMT_off) {
337 MemTracker::transition_to(NMT_off);
338 return MemTracker::tracking_level() == NMT_off;
339 } else {
340 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
341 MemTracker::transition_to(NMT_summary);
342 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
343
344 // Can't go to detail once NMT is set to summary.
345 MemTracker::transition_to(NMT_detail);
346 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
347
348 // Shutdown sets tracking level to minimal.
349 MemTracker::shutdown();
350 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
351
352 // Once the tracking level is minimal, we cannot increase to summary.
353 // The code ignores this request instead of asserting because if the malloc site
354 // table overflows in another thread, it tries to change the code to summary.
355 MemTracker::transition_to(NMT_summary);
356 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
357
358 // Really can never go up to detail, verify that the code would never do this.
359 MemTracker::transition_to(NMT_detail);
360 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
361 return MemTracker::tracking_level() == NMT_minimal;
362 }
363 WB_END
364
365 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
366 int hash_size = MallocSiteTable::hash_buckets();
367 assert(hash_size > 0, "NMT hash_size should be > 0");
368 return (jint)hash_size;
369 WB_END
370 #endif // INCLUDE_NMT
371
372 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
373 assert(method != NULL, "method should not be null");
374 ThreadToNativeFromVM ttn(thread);
375 return env->FromReflectedMethod(method);
376 }
377
378 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
379 MutexLockerEx mu(Compile_lock);
380 CodeCache::mark_all_nmethods_for_deoptimization();
381 VM_Deoptimize op;
382 VMThread::execute(&op);
383 WB_END
384
385 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
386 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
387 int result = 0;
388 CHECK_JNI_EXCEPTION_(env, result);
389 MutexLockerEx mu(Compile_lock);
390 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
391 if (is_osr) {
392 result += mh->mark_osr_nmethods();
393 } else if (mh->code() != NULL) {
394 mh->code()->mark_for_deoptimization();
395 ++result;
396 }
397 result += CodeCache::mark_for_deoptimization(mh());
398 if (result > 0) {
399 VM_Deoptimize op;
400 VMThread::execute(&op);
401 }
402 return result;
403 WB_END
404
405 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
406 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
407 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
408 MutexLockerEx mu(Compile_lock);
409 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
410 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
411 if (code == NULL) {
412 return JNI_FALSE;
413 }
414 return (code->is_alive() && !code->is_marked_for_deoptimization());
415 WB_END
416
417 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
418 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
419 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
420 MutexLockerEx mu(Compile_lock);
421 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
422 if (is_osr) {
423 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
424 } else {
425 return CompilationPolicy::can_be_compiled(mh, comp_level);
426 }
427 WB_END
428
429 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
430 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
431 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
432 MutexLockerEx mu(Compile_lock);
433 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
434 return mh->queued_for_compilation();
435 WB_END
436
437 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
438 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
439 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
440 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
441 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
442 return (code != NULL ? code->comp_level() : CompLevel_none);
443 WB_END
444
445 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
446 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
447 CHECK_JNI_EXCEPTION(env);
448 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
449 if (is_osr) {
450 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
451 } else {
452 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
453 }
454 WB_END
455
456 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
457 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
458 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
459 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
460 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
461 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
462 WB_END
463
464 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
465 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
466 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
467 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
468 bool result = mh->dont_inline();
469 mh->set_dont_inline(value == JNI_TRUE);
470 return result;
471 WB_END
472
473 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
474 if (comp_level == CompLevel_any) {
475 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
476 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
477 } else {
478 return CompileBroker::queue_size(comp_level);
479 }
480 WB_END
481
482 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
483 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
484 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
485 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
486 bool result = mh->force_inline();
487 mh->set_force_inline(value == JNI_TRUE);
488 return result;
489 WB_END
490
491 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
492 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
493 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
494 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
495 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
496 MutexLockerEx mu(Compile_lock);
497 return (mh->queued_for_compilation() || nm != NULL);
498 WB_END
499
500 class VM_WhiteBoxOperation : public VM_Operation {
501 public:
502 VM_WhiteBoxOperation() { }
503 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
504 bool allow_nested_vm_operations() const { return true; }
505 };
506
507 class AlwaysFalseClosure : public BoolObjectClosure {
508 public:
509 bool do_object_b(oop p) { return false; }
510 };
511
512 static AlwaysFalseClosure always_false;
513
514 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
515 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
516 CHECK_JNI_EXCEPTION(env);
517 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
518 MutexLockerEx mu(Compile_lock);
519 MethodData* mdo = mh->method_data();
520 MethodCounters* mcs = mh->method_counters();
521
522 if (mdo != NULL) {
523 mdo->init();
524 ResourceMark rm;
525 int arg_count = mdo->method()->size_of_parameters();
526 for (int i = 0; i < arg_count; i++) {
527 mdo->set_arg_modified(i, 0);
528 }
529 MutexLockerEx mu(mdo->extra_data_lock());
530 mdo->clean_method_data(&always_false);
531 }
532
533 mh->clear_not_c1_compilable();
534 mh->clear_not_c2_compilable();
535 mh->clear_not_c2_osr_compilable();
536 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
537 if (mcs != NULL) {
538 mcs->backedge_counter()->init();
539 mcs->invocation_counter()->init();
540 mcs->set_interpreter_invocation_count(0);
541 mcs->set_interpreter_throwout_count(0);
542
543 #ifdef TIERED
544 mcs->set_rate(0.0F);
545 mh->set_prev_event_count(0);
546 mh->set_prev_time(0);
547 #endif
548 }
549 WB_END
550
551 template <typename T>
552 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
553 if (name == NULL) {
554 return false;
555 }
556 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
557 const char* flag_name = env->GetStringUTFChars(name, NULL);
558 bool result = (*TAt)(flag_name, value, true, true);
559 env->ReleaseStringUTFChars(name, flag_name);
560 return result;
561 }
562
563 template <typename T>
564 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
565 if (name == NULL) {
566 return false;
567 }
568 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
569 const char* flag_name = env->GetStringUTFChars(name, NULL);
570 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
571 env->ReleaseStringUTFChars(name, flag_name);
572 return result;
573 }
574
575 template <typename T>
576 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
577 ResourceMark rm(thread);
578 jclass clazz = env->FindClass(name->as_C_string());
579 CHECK_JNI_EXCEPTION_(env, NULL);
580 jmethodID methodID = env->GetStaticMethodID(clazz,
581 vmSymbols::valueOf_name()->as_C_string(),
582 sig->as_C_string());
583 CHECK_JNI_EXCEPTION_(env, NULL);
584 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
585 CHECK_JNI_EXCEPTION_(env, NULL);
586 return result;
587 }
588
589 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
590 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
591 }
592 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
593 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
594 }
595 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
596 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
597 }
598 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
599 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
600 }*/
601 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
602 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
603 }
604
605 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
606 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
607 const char* flag_name = env->GetStringUTFChars(name, NULL);
608 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
609 env->ReleaseStringUTFChars(name, flag_name);
610 return result;
611 }
612
613 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
614 Flag* flag = getVMFlag(thread, env, name);
615 return (flag != NULL) && flag->is_constant_in_binary();
616 WB_END
617
618 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
619 Flag* flag = getVMFlag(thread, env, name);
620 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
621 WB_END
622
623 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
624 bool result;
625 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
626 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
627 return booleanBox(thread, env, result);
628 }
629 return NULL;
630 WB_END
631
632 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
633 intx result;
634 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
635 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
636 return longBox(thread, env, result);
637 }
638 return NULL;
639 WB_END
640
641 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
642 uintx result;
643 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
644 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
645 return longBox(thread, env, result);
646 }
647 return NULL;
648 WB_END
649
650 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
651 uint64_t result;
652 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
653 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
654 return longBox(thread, env, result);
655 }
656 return NULL;
657 WB_END
658
659 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
660 uintx result;
661 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
662 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
663 return longBox(thread, env, result);
664 }
665 return NULL;
666 WB_END
667
668 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
669 double result;
670 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
671 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
672 return doubleBox(thread, env, result);
673 }
674 return NULL;
675 WB_END
676
677 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
678 ccstr ccstrResult;
679 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
680 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
681 jstring result = env->NewStringUTF(ccstrResult);
682 CHECK_JNI_EXCEPTION_(env, NULL);
683 return result;
684 }
685 return NULL;
686 WB_END
687
688 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
689 bool result = value == JNI_TRUE ? true : false;
690 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
691 WB_END
692
693 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
694 intx result = value;
695 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
696 WB_END
697
698 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
699 uintx result = value;
700 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
701 WB_END
702
703 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
704 uint64_t result = value;
705 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
706 WB_END
707
708 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
709 size_t result = value;
710 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
711 WB_END
712
713 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
714 double result = value;
715 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
716 WB_END
717
718 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
719 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
720 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
721 ccstr ccstrResult = ccstrValue;
722 bool needFree;
723 {
724 ThreadInVMfromNative ttvfn(thread); // back to VM
725 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
726 }
727 if (value != NULL) {
728 env->ReleaseStringUTFChars(value, ccstrValue);
729 }
730 if (needFree) {
731 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
732 }
733 WB_END
734
735
736 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
737 WhiteBox::compilation_locked = true;
738 WB_END
739
740 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
741 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
742 WhiteBox::compilation_locked = false;
743 mo.notify_all();
744 WB_END
745
746 void WhiteBox::sweeper_thread_entry(JavaThread* thread, TRAPS) {
747 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
748 {
749 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
750 NMethodSweeper::_should_sweep = true;
751 }
752 NMethodSweeper::possibly_sweep();
753 }
754
755 JavaThread* WhiteBox::create_sweeper_thread(TRAPS) {
756 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_NULL);
757 instanceKlassHandle klass(THREAD, k);
758 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL);
759 Handle string = java_lang_String::create_from_str("WB Sweeper thread", CHECK_NULL);
760
761 CodeCacheSweeperThread* sweeper_thread = new CodeCacheSweeperThread();
762 sweeper_thread->set_entry_point(&WhiteBox::sweeper_thread_entry);
763 JavaValue result(T_VOID);
764 JavaCalls::call_special(&result, thread_oop,
765 klass,
766 vmSymbols::object_initializer_name(),
767 vmSymbols::string_void_signature(),
768 string,
769 CHECK_NULL);
770 {
771 MutexLocker mu(Threads_lock, THREAD);
772 java_lang_Thread::set_thread(thread_oop(), sweeper_thread);
773 if (java_lang_Thread::is_daemon(JavaThread::current()->threadObj())) {
774 java_lang_Thread::set_daemon(thread_oop());
775 }
776 sweeper_thread->set_threadObj(thread_oop());
777 Threads::add(sweeper_thread);
778 Thread::start(sweeper_thread);
779 }
780 return sweeper_thread;
781 }
782
783 WB_ENTRY(jobject, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
784 JavaThread* sweeper_thread = WhiteBox::create_sweeper_thread(JavaThread::current());
785 if (sweeper_thread == NULL) {
786 return NULL;
787 }
788 jobject result = JNIHandles::make_local(env, sweeper_thread->threadObj());
789 return result;
790 WB_END
791
792 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
793 ResourceMark rm(THREAD);
794 int len;
795 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
796 return (StringTable::lookup(name, len) != NULL);
797 WB_END
798
799 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
800 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
801 Universe::heap()->collect(GCCause::_last_ditch_collection);
802 #if INCLUDE_ALL_GCS
803 if (UseG1GC) {
804 // Needs to be cleared explicitly for G1
805 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
806 }
807 #endif // INCLUDE_ALL_GCS
808 WB_END
809
810 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
811 Universe::heap()->collect(GCCause::_wb_young_gc);
812 WB_END
813
814 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
815 // static+volatile in order to force the read to happen
816 // (not be eliminated by the compiler)
817 static char c;
818 static volatile char* p;
819
820 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
821 if (p == NULL) {
822 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
823 }
824
825 c = *p;
826 WB_END
827
828 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
829 const char* cpu_features = VM_Version::cpu_features();
830 ThreadToNativeFromVM ttn(thread);
831 jstring features_string = env->NewStringUTF(cpu_features);
832
833 CHECK_JNI_EXCEPTION_(env, NULL);
834
835 return features_string;
836 WB_END
837
838 int WhiteBox::get_blob_type(const CodeBlob* code) {
839 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
840 return CodeCache::get_code_heap(code)->code_blob_type();
841 }
842
843 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
844 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
845 return CodeCache::get_code_heap(blob_type);
846 }
847
848 struct CodeBlobStub {
849 CodeBlobStub(const CodeBlob* blob) :
850 name(os::strdup(blob->name())),
851 size(blob->size()),
852 blob_type(WhiteBox::get_blob_type(blob)) { }
853 ~CodeBlobStub() { os::free((void*) name); }
854 const char* const name;
855 const int size;
856 const int blob_type;
857 };
858
859 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
860 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
861 CHECK_JNI_EXCEPTION_(env, NULL);
862 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
863
864 jstring name = env->NewStringUTF(cb->name);
865 CHECK_JNI_EXCEPTION_(env, NULL);
866 env->SetObjectArrayElement(result, 0, name);
867
868 jobject obj = integerBox(thread, env, cb->size);
869 CHECK_JNI_EXCEPTION_(env, NULL);
870 env->SetObjectArrayElement(result, 1, obj);
871
872 obj = integerBox(thread, env, cb->blob_type);
873 CHECK_JNI_EXCEPTION_(env, NULL);
874 env->SetObjectArrayElement(result, 2, obj);
875
876 return result;
877 }
878
879 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
880 ResourceMark rm(THREAD);
881 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
882 CHECK_JNI_EXCEPTION_(env, NULL);
883 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
884 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
885 jobjectArray result = NULL;
886 if (code == NULL) {
887 return result;
888 }
889 int insts_size = code->insts_size();
890
891 ThreadToNativeFromVM ttn(thread);
892 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
893 CHECK_JNI_EXCEPTION_(env, NULL);
894 result = env->NewObjectArray(4, clazz, NULL);
895 if (result == NULL) {
896 return result;
897 }
898
899 CodeBlobStub stub(code);
900 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
901 env->SetObjectArrayElement(result, 0, codeBlob);
902
903 jobject level = integerBox(thread, env, code->comp_level());
904 CHECK_JNI_EXCEPTION_(env, NULL);
905 env->SetObjectArrayElement(result, 1, level);
906
907 jbyteArray insts = env->NewByteArray(insts_size);
908 CHECK_JNI_EXCEPTION_(env, NULL);
909 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
910 env->SetObjectArrayElement(result, 2, insts);
911
912 jobject id = integerBox(thread, env, code->compile_id());
913 CHECK_JNI_EXCEPTION_(env, NULL);
914 env->SetObjectArrayElement(result, 3, id);
915
916 return result;
917 WB_END
918
919 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
920 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
921 BufferBlob* blob;
922 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
923 if (full_size < size) {
924 full_size += round_to(size - full_size, oopSize);
925 }
926 {
927 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
928 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
929 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
930 }
931 // Track memory usage statistic after releasing CodeCache_lock
932 MemoryService::track_code_cache_memory_usage();
933 return blob;
934 }
935
936 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
937 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
938 WB_END
939
940 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
941 BufferBlob::free((BufferBlob*) addr);
942 WB_END
943
944 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
945 ResourceMark rm;
946 GrowableArray<CodeBlobStub*> blobs;
947 {
948 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
949 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
950 if (heap == NULL) {
951 return NULL;
952 }
953 for (CodeBlob* cb = (CodeBlob*) heap->first();
954 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
955 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
956 new (stub) CodeBlobStub(cb);
957 blobs.append(stub);
958 }
959 }
960 if (blobs.length() == 0) {
961 return NULL;
962 }
963 ThreadToNativeFromVM ttn(thread);
964 jobjectArray result = NULL;
965 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
966 CHECK_JNI_EXCEPTION_(env, NULL);
967 result = env->NewObjectArray(blobs.length(), clazz, NULL);
968 if (result == NULL) {
969 return result;
970 }
971 int i = 0;
972 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
973 it != blobs.end(); ++it) {
974 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
975 env->SetObjectArrayElement(result, i, obj);
976 ++i;
977 }
978 return result;
979 WB_END
980
981 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
982 return (jlong) Thread::current()->stack_size();
983 WB_END
984
985 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
986 JavaThread* t = JavaThread::current();
987 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
988 WB_END
989
990 int WhiteBox::array_bytes_to_length(size_t bytes) {
991 return Array<u1>::bytes_to_length(bytes);
992 }
993
994 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
995 if (size < 0) {
996 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
997 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
998 }
999
1000 oop class_loader_oop = JNIHandles::resolve(class_loader);
1001 ClassLoaderData* cld = class_loader_oop != NULL
1002 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1003 : ClassLoaderData::the_null_class_loader_data();
1004
1005 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1006
1007 return (jlong)(uintptr_t)metadata;
1008 WB_END
1009
1010 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1011 oop class_loader_oop = JNIHandles::resolve(class_loader);
1012 ClassLoaderData* cld = class_loader_oop != NULL
1013 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1014 : ClassLoaderData::the_null_class_loader_data();
1015
1016 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1017 WB_END
1018
1019 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1020 if (inc < 0) {
1021 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1022 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1023 }
1024
1025 jlong max_size_t = (jlong) ((size_t) -1);
1026 if (inc > max_size_t) {
1027 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1028 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1029 }
1030
1031 size_t new_cap_until_GC = 0;
1032 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1033 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1034 if (!success) {
1035 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1036 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1037 "due to contention with another thread");
1038 }
1039 return (jlong) new_cap_until_GC;
1040 WB_END
1041
1042 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1043 return (jlong) MetaspaceGC::capacity_until_GC();
1044 WB_END
1045
1046 //Some convenience methods to deal with objects from java
1047 int WhiteBox::offset_for_field(const char* field_name, oop object,
1048 Symbol* signature_symbol) {
1049 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1050 Thread* THREAD = Thread::current();
1051
1052 //Get the class of our object
1053 Klass* arg_klass = object->klass();
1054 //Turn it into an instance-klass
1055 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1056
1057 //Create symbols to look for in the class
1058 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1059 THREAD);
1060
1061 //To be filled in with an offset of the field we're looking for
1062 fieldDescriptor fd;
1063
1064 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1065 if (res == NULL) {
1066 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1067 name_symbol->as_C_string());
1068 fatal("Invalid layout of preloaded class");
1069 }
1070
1071 //fetch the field at the offset we've found
1072 int dest_offset = fd.offset();
1073
1074 return dest_offset;
1075 }
1076
1077
1078 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1079 int offset = offset_for_field(field_name, object,
1080 vmSymbols::string_signature());
1081 oop string = object->obj_field(offset);
1082 if (string == NULL) {
1083 return NULL;
1084 }
1085 const char* ret = java_lang_String::as_utf8_string(string);
1086 return ret;
1087 }
1088
1089 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1090 int offset =
1091 offset_for_field(field_name, object, vmSymbols::bool_signature());
1092 bool ret = (object->bool_field(offset) == JNI_TRUE);
1093 return ret;
1094 }
1095
1096 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1097 ResourceMark rm;
1098 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1099
1100 // one by one registration natives for exception catching
1101 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1102 CHECK_JNI_EXCEPTION(env);
1103 for (int i = 0, n = method_count; i < n; ++i) {
1104 // Skip dummy entries
1105 if (method_array[i].fnPtr == NULL) continue;
1106 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1107 jthrowable throwable_obj = env->ExceptionOccurred();
1108 if (throwable_obj != NULL) {
1109 env->ExceptionClear();
1110 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1111 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1112 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1113 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1114 method_array[i].name, method_array[i].signature);
1115 }
1116 } else {
1117 // Registration failed unexpectedly.
1118 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1119 method_array[i].name, method_array[i].signature);
1120 env->UnregisterNatives(wbclass);
1121 break;
1122 }
1123 }
1124 }
1125 }
1126
1127 #define CC (char*)
1128
1129 static JNINativeMethod methods[] = {
1130 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1131 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1132 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1133 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1134 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1135 {CC"parseCommandLine",
1136 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1137 (void*) &WB_ParseCommandLine
1138 },
1139 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1140 (void*)&WB_GetCompressedOopsMaxHeapSize},
1141 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1142 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1143 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1144 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1145 #if INCLUDE_ALL_GCS
1146 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1147 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1148 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1149 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1150 #endif // INCLUDE_ALL_GCS
1151 #if INCLUDE_NMT
1152 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1153 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1154 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1155 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1156 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1157 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1158 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1159 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1160 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1161 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1162 #endif // INCLUDE_NMT
1163 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1164 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1165 (void*)&WB_DeoptimizeMethod },
1166 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1167 (void*)&WB_IsMethodCompiled },
1168 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1169 (void*)&WB_IsMethodCompilable},
1170 {CC"isMethodQueuedForCompilation",
1171 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1172 {CC"makeMethodNotCompilable",
1173 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1174 {CC"testSetDontInlineMethod",
1175 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1176 {CC"getMethodCompilationLevel",
1177 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1178 {CC"getMethodEntryBci",
1179 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1180 {CC"getCompileQueueSize",
1181 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1182 {CC"testSetForceInlineMethod",
1183 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1184 {CC"enqueueMethodForCompilation",
1185 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1186 {CC"clearMethodState",
1187 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1188 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1189 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1190 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1191 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1192 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1193 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1194 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1195 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1196 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1197 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1198 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1199 (void*)&WB_SetStringVMFlag},
1200 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1201 (void*)&WB_GetBooleanVMFlag},
1202 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1203 (void*)&WB_GetIntxVMFlag},
1204 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1205 (void*)&WB_GetUintxVMFlag},
1206 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1207 (void*)&WB_GetUint64VMFlag},
1208 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1209 (void*)&WB_GetSizeTVMFlag},
1210 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1211 (void*)&WB_GetDoubleVMFlag},
1212 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1213 (void*)&WB_GetStringVMFlag},
1214 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1215 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1216 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1217 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1218 {CC"allocateMetaspace",
1219 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1220 {CC"freeMetaspace",
1221 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1222 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1223 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1224 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1225 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1226 (void*)&WB_GetNMethod },
1227 {CC"forceNMethodSweep0", CC"()Ljava/lang/Thread;", (void*)&WB_ForceNMethodSweep },
1228 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1229 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1230 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1231 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1232 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1233 };
1234
1235 #undef CC
1236
1237 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1238 {
1239 if (WhiteBoxAPI) {
1240 // Make sure that wbclass is loaded by the null classloader
1241 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1242 Handle loader(ikh->class_loader());
1243 if (loader.is_null()) {
1244 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1245 WhiteBox::register_extended(env, wbclass, thread);
1246 WhiteBox::set_used();
1247 }
1248 }
1249 }
1250 JVM_END