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 "code/codeCache.hpp"
28 #include "memory/metadataFactory.hpp"
29 #include "memory/universe.hpp"
30 #include "oops/oop.inline.hpp"
31
32 #include "classfile/stringTable.hpp"
33 #include "classfile/classLoaderData.hpp"
34
35 #include "prims/whitebox.hpp"
36 #include "prims/wbtestmethods/parserTests.hpp"
37
38 #include "runtime/thread.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/deoptimization.hpp"
41 #include "runtime/interfaceSupport.hpp"
42 #include "runtime/os.hpp"
43 #include "runtime/vm_version.hpp"
44 #include "runtime/sweeper.hpp"
45
46 #include "utilities/array.hpp"
47 #include "utilities/debug.hpp"
48 #include "utilities/macros.hpp"
49 #include "utilities/exceptions.hpp"
50
51 #if INCLUDE_ALL_GCS
52 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
53 #include "gc_implementation/g1/concurrentMark.hpp"
54 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
55 #include "gc_implementation/g1/heapRegionRemSet.hpp"
56 #endif // INCLUDE_ALL_GCS
57
58 #if INCLUDE_NMT
59 #include "services/mallocSiteTable.hpp"
60 #include "services/memTracker.hpp"
61 #include "utilities/nativeCallStack.hpp"
62 #endif // INCLUDE_NMT
63
64 #include "compiler/compileBroker.hpp"
65 #include "runtime/compilationPolicy.hpp"
66
67 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
68
69 #define SIZE_T_MAX_VALUE ((size_t) -1)
70
71 bool WhiteBox::_used = false;
72 volatile bool WhiteBox::compilation_locked = false;
73
74 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
75 return (jlong)(void*)JNIHandles::resolve(obj);
76 WB_END
77
78 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
79 return heapOopSize;
80 WB_END
81
82
83 class WBIsKlassAliveClosure : public KlassClosure {
84 Symbol* _name;
85 bool _found;
86 public:
87 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
88
89 void do_klass(Klass* k) {
90 if (_found) return;
91 Symbol* ksym = k->name();
92 if (ksym->fast_compare(_name) == 0) {
93 _found = true;
94 }
95 }
96
97 bool found() const {
98 return _found;
99 }
100 };
101
102 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
103 Handle h_name = JNIHandles::resolve(name);
104 if (h_name.is_null()) return false;
105 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
106 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
107
108 WBIsKlassAliveClosure closure(sym);
109 ClassLoaderDataGraph::classes_do(&closure);
110
111 return closure.found();
112 WB_END
113
114 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
115 return (jlong)Arguments::max_heap_for_compressed_oops();
116 }
117 WB_END
118
119 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
120 CollectorPolicy * p = Universe::heap()->collector_policy();
121 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
122 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
123 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
124 p->space_alignment(), p->heap_alignment());
125 }
126 WB_END
127
128 #ifndef PRODUCT
129 // Forward declaration
130 void TestReservedSpace_test();
131 void TestReserveMemorySpecial_test();
132 void TestVirtualSpace_test();
133 void TestMetaspaceAux_test();
134 #endif
135
136 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
137 #ifndef PRODUCT
138 TestReservedSpace_test();
139 TestReserveMemorySpecial_test();
140 TestVirtualSpace_test();
141 TestMetaspaceAux_test();
142 #endif
143 WB_END
144
145 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
146 size_t granularity = os::vm_allocation_granularity();
147 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
148 VirtualSpace vs;
149 vs.initialize(rhs, 50 * granularity);
150
151 //Check if constraints are complied
152 if (!( UseCompressedOops && rhs.base() != NULL &&
153 Universe::narrow_oop_base() != NULL &&
154 Universe::narrow_oop_use_implicit_null_checks() )) {
155 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
156 "\tUseCompressedOops is %d\n"
157 "\trhs.base() is "PTR_FORMAT"\n"
158 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
159 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
160 UseCompressedOops,
161 rhs.base(),
162 Universe::narrow_oop_base(),
163 Universe::narrow_oop_use_implicit_null_checks());
164 return;
165 }
166 tty->print_cr("Reading from no access area... ");
167 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
168 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
169 WB_END
170
171 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
172 size_t magnitude, size_t iterations) {
173 size_t granularity = os::vm_allocation_granularity();
174 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
175 VirtualSpace vs;
176 if (!vs.initialize(rhs, 0)) {
177 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
178 return 3;
179 }
180
181 long seed = os::random();
182 tty->print_cr("Random seed is %ld", seed);
183 os::init_random(seed);
184
185 for (size_t i = 0; i < iterations; i++) {
186
187 // Whether we will shrink or grow
188 bool shrink = os::random() % 2L == 0;
189
190 // Get random delta to resize virtual space
191 size_t delta = (size_t)os::random() % magnitude;
192
193 // If we are about to shrink virtual space below zero, then expand instead
194 if (shrink && vs.committed_size() < delta) {
195 shrink = false;
196 }
197
198 // Resizing by delta
199 if (shrink) {
200 vs.shrink_by(delta);
201 } else {
202 // If expanding fails expand_by will silently return false
203 vs.expand_by(delta, true);
204 }
205 }
206 return 0;
207 }
208
209 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
210 jlong reserved_space_size, jlong magnitude, jlong iterations))
211 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
212 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
213 iterations);
214 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
215 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
216 return 1;
217 }
218
219 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
220 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
221 if (sizeof(size_t) < sizeof(jlong)) {
222 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
223 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
224 || iterations > size_t_max_value) {
225 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
226 return 2;
227 }
228 }
229
230 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
231 (size_t) magnitude, (size_t) iterations);
232 WB_END
233
234 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
235 oop p = JNIHandles::resolve(obj);
236 #if INCLUDE_ALL_GCS
237 if (UseG1GC) {
238 G1CollectedHeap* g1 = G1CollectedHeap::heap();
239 const HeapRegion* hr = g1->heap_region_containing(p);
240 if (hr == NULL) {
241 return false;
242 }
243 return !(hr->is_young());
244 } else if (UseParallelGC) {
245 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
246 return !psh->is_in_young(p);
247 }
248 #endif // INCLUDE_ALL_GCS
249 GenCollectedHeap* gch = GenCollectedHeap::heap();
250 return !gch->is_in_young(p);
251 WB_END
252
253 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
254 oop p = JNIHandles::resolve(obj);
255 return p->size() * HeapWordSize;
256 WB_END
257
258 #if INCLUDE_ALL_GCS
259 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
260 G1CollectedHeap* g1 = G1CollectedHeap::heap();
261 oop result = JNIHandles::resolve(obj);
262 const HeapRegion* hr = g1->heap_region_containing(result);
263 return hr->is_humongous();
264 WB_END
265
266 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
267 G1CollectedHeap* g1 = G1CollectedHeap::heap();
268 size_t nr = g1->num_free_regions();
269 return (jlong)nr;
270 WB_END
271
272 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
273 G1CollectedHeap* g1 = G1CollectedHeap::heap();
274 ConcurrentMark* cm = g1->concurrent_mark();
275 return cm->concurrent_marking_in_progress();
276 WB_END
277
278 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
279 return (jint)HeapRegion::GrainBytes;
280 WB_END
281 #endif // INCLUDE_ALL_GCS
282
283 #if INCLUDE_NMT
284 // Alloc memory using the test memory type so that we can use that to see if
285 // NMT picks it up correctly
286 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
287 jlong addr = 0;
288 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
289 return addr;
290 WB_END
291
292 // Alloc memory with pseudo call stack. The test can create psudo malloc
293 // allocation site to stress the malloc tracking.
294 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
295 address pc = (address)(size_t)pseudo_stack;
296 NativeCallStack stack(&pc, 1);
297 return (jlong)os::malloc(size, mtTest, stack);
298 WB_END
299
300 // Free the memory allocated by NMTAllocTest
301 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
302 os::free((void*)(uintptr_t)mem, mtTest);
303 WB_END
304
305 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
306 jlong addr = 0;
307
308 addr = (jlong)(uintptr_t)os::reserve_memory(size);
309 MemTracker::record_virtual_memory_type((address)addr, mtTest);
310
311 return addr;
312 WB_END
313
314 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
315 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
316 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
317 WB_END
318
319 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
320 os::uncommit_memory((char *)(uintptr_t)addr, size);
321 WB_END
322
323 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
324 os::release_memory((char *)(uintptr_t)addr, size);
325 WB_END
326
327 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
328 return MemTracker::tracking_level() == NMT_detail;
329 WB_END
330
331 WB_ENTRY(void, WB_NMTOverflowHashBucket(JNIEnv* env, jobject o, jlong num))
332 address pc = (address)1;
333 for (jlong index = 0; index < num; index ++) {
334 NativeCallStack stack(&pc, 1);
335 os::malloc(0, mtTest, stack);
336 pc += MallocSiteTable::hash_buckets();
337 }
338 WB_END
339
340 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
341 // Test that we can downgrade NMT levels but not upgrade them.
342 if (MemTracker::tracking_level() == NMT_off) {
343 MemTracker::transition_to(NMT_off);
344 return MemTracker::tracking_level() == NMT_off;
345 } else {
346 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
347 MemTracker::transition_to(NMT_summary);
348 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
349
350 // Can't go to detail once NMT is set to summary.
351 MemTracker::transition_to(NMT_detail);
352 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
353
354 // Shutdown sets tracking level to minimal.
355 MemTracker::shutdown();
356 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
357
358 // Once the tracking level is minimal, we cannot increase to summary.
359 // The code ignores this request instead of asserting because if the malloc site
360 // table overflows in another thread, it tries to change the code to summary.
361 MemTracker::transition_to(NMT_summary);
362 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
363
364 // Really can never go up to detail, verify that the code would never do this.
365 MemTracker::transition_to(NMT_detail);
366 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
367 return MemTracker::tracking_level() == NMT_minimal;
368 }
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::force_sweep() {
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 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
756 WhiteBox::force_sweep();
757 WB_END
758
759 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
760 ResourceMark rm(THREAD);
761 int len;
762 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
763 return (StringTable::lookup(name, len) != NULL);
764 WB_END
765
766 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
767 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
768 Universe::heap()->collect(GCCause::_last_ditch_collection);
769 #if INCLUDE_ALL_GCS
770 if (UseG1GC) {
771 // Needs to be cleared explicitly for G1
772 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
773 }
774 #endif // INCLUDE_ALL_GCS
775 WB_END
776
777 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
778 Universe::heap()->collect(GCCause::_wb_young_gc);
779 WB_END
780
781 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
782 // static+volatile in order to force the read to happen
783 // (not be eliminated by the compiler)
784 static char c;
785 static volatile char* p;
786
787 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
788 if (p == NULL) {
789 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
790 }
791
792 c = *p;
793 WB_END
794
795 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
796 const char* cpu_features = VM_Version::cpu_features();
797 ThreadToNativeFromVM ttn(thread);
798 jstring features_string = env->NewStringUTF(cpu_features);
799
800 CHECK_JNI_EXCEPTION_(env, NULL);
801
802 return features_string;
803 WB_END
804
805 int WhiteBox::get_blob_type(const CodeBlob* code) {
806 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
807 return CodeCache::get_code_heap(code)->code_blob_type();
808 }
809
810 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
811 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
812 return CodeCache::get_code_heap(blob_type);
813 }
814
815 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlob* cb) {
816 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
817 CHECK_JNI_EXCEPTION_(env, NULL);
818 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
819
820 jstring name = env->NewStringUTF(cb->name());
821 CHECK_JNI_EXCEPTION_(env, NULL);
822 env->SetObjectArrayElement(result, 0, name);
823
824 jobject obj = integerBox(thread, env, cb->size());
825 CHECK_JNI_EXCEPTION_(env, NULL);
826 env->SetObjectArrayElement(result, 1, obj);
827
828 obj = integerBox(thread, env, WhiteBox::get_blob_type(cb));
829 CHECK_JNI_EXCEPTION_(env, NULL);
830 env->SetObjectArrayElement(result, 2, obj);
831
832 return result;
833 }
834
835 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
836 ResourceMark rm(THREAD);
837 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
838 CHECK_JNI_EXCEPTION_(env, NULL);
839 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
840 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
841 jobjectArray result = NULL;
842 if (code == NULL) {
843 return result;
844 }
845 int insts_size = code->insts_size();
846
847 ThreadToNativeFromVM ttn(thread);
848 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
849 CHECK_JNI_EXCEPTION_(env, NULL);
850 result = env->NewObjectArray(4, clazz, NULL);
851 if (result == NULL) {
852 return result;
853 }
854
855 jobjectArray codeBlob = codeBlob2objectArray(thread, env, code);
856 env->SetObjectArrayElement(result, 0, codeBlob);
857
858 jobject level = integerBox(thread, env, code->comp_level());
859 CHECK_JNI_EXCEPTION_(env, NULL);
860 env->SetObjectArrayElement(result, 1, level);
861
862 jbyteArray insts = env->NewByteArray(insts_size);
863 CHECK_JNI_EXCEPTION_(env, NULL);
864 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
865 env->SetObjectArrayElement(result, 2, insts);
866
867 jobject id = integerBox(thread, env, code->compile_id());
868 CHECK_JNI_EXCEPTION_(env, NULL);
869 env->SetObjectArrayElement(result, 3, id);
870
871 return result;
872 WB_END
873
874 CodeBlob* WhiteBox::allocateCodeHeap(int size, int blob_type) {
875 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
876 BufferBlob* blob;
877 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
878 if (full_size < size) {
879 full_size += round_to(size - full_size, oopSize);
880 }
881 {
882 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
883 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
884 }
885 // Track memory usage statistic after releasing CodeCache_lock
886 MemoryService::track_code_cache_memory_usage();
887 new (blob) BufferBlob("WB::DummyBlob", full_size);
888 return blob;
889 }
890
891 WB_ENTRY(jlong, WB_AllocateCodeHeap(JNIEnv* env, jobject o, jint size, jint blob_type))
892 return (jlong) WhiteBox::allocateCodeHeap(size, blob_type);
893 WB_END
894
895 WB_ENTRY(void, WB_FreeCodeHeap(JNIEnv* env, jobject o, jlong addr))
896 BufferBlob::free((BufferBlob*) addr);
897 WB_END
898
899 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
900 ResourceMark rm;
901 GrowableArray<CodeBlob*> blobs;
902 {
903 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
904 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
905 if (heap == NULL) {
906 return NULL;
907 }
908 for (CodeBlob* cb = (CodeBlob*) heap->first();
909 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
910 blobs.append(cb);
911 }
912 }
913 ThreadToNativeFromVM ttn(thread);
914 jobjectArray result = NULL;
915 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
916 CHECK_JNI_EXCEPTION_(env, NULL);
917 result = env->NewObjectArray(blobs.length(), clazz, NULL);
918 if (result == NULL) {
919 return result;
920 }
921 int i = 0;
922 for (GrowableArrayIterator<CodeBlob*> it = blobs.begin();
923 it != blobs.end(); ++it) {
924 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
925 env->SetObjectArrayElement(result, i, obj);
926 ++i;
927 }
928 return result;
929 WB_END
930
931 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
932 return (jlong) Thread::current()->stack_size();
933 WB_END
934
935 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
936 JavaThread* t = JavaThread::current();
937 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
938 WB_END
939
940 int WhiteBox::array_bytes_to_length(size_t bytes) {
941 return Array<u1>::bytes_to_length(bytes);
942 }
943
944 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
945 if (size < 0) {
946 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
947 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
948 }
949
950 oop class_loader_oop = JNIHandles::resolve(class_loader);
951 ClassLoaderData* cld = class_loader_oop != NULL
952 ? java_lang_ClassLoader::loader_data(class_loader_oop)
953 : ClassLoaderData::the_null_class_loader_data();
954
955 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
956
957 return (jlong)(uintptr_t)metadata;
958 WB_END
959
960 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
961 oop class_loader_oop = JNIHandles::resolve(class_loader);
962 ClassLoaderData* cld = class_loader_oop != NULL
963 ? java_lang_ClassLoader::loader_data(class_loader_oop)
964 : ClassLoaderData::the_null_class_loader_data();
965
966 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
967 WB_END
968
969 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
970 if (inc < 0) {
971 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
972 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
973 }
974
975 jlong max_size_t = (jlong) ((size_t) -1);
976 if (inc > max_size_t) {
977 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
978 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
979 }
980
981 size_t new_cap_until_GC = 0;
982 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
983 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
984 if (!success) {
985 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
986 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
987 "due to contention with another thread");
988 }
989 return (jlong) new_cap_until_GC;
990 WB_END
991
992 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
993 return (jlong) MetaspaceGC::capacity_until_GC();
994 WB_END
995
996 //Some convenience methods to deal with objects from java
997 int WhiteBox::offset_for_field(const char* field_name, oop object,
998 Symbol* signature_symbol) {
999 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1000 Thread* THREAD = Thread::current();
1001
1002 //Get the class of our object
1003 Klass* arg_klass = object->klass();
1004 //Turn it into an instance-klass
1005 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1006
1007 //Create symbols to look for in the class
1008 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1009 THREAD);
1010
1011 //To be filled in with an offset of the field we're looking for
1012 fieldDescriptor fd;
1013
1014 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1015 if (res == NULL) {
1016 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1017 name_symbol->as_C_string());
1018 fatal("Invalid layout of preloaded class");
1019 }
1020
1021 //fetch the field at the offset we've found
1022 int dest_offset = fd.offset();
1023
1024 return dest_offset;
1025 }
1026
1027
1028 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1029 int offset = offset_for_field(field_name, object,
1030 vmSymbols::string_signature());
1031 oop string = object->obj_field(offset);
1032 if (string == NULL) {
1033 return NULL;
1034 }
1035 const char* ret = java_lang_String::as_utf8_string(string);
1036 return ret;
1037 }
1038
1039 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1040 int offset =
1041 offset_for_field(field_name, object, vmSymbols::bool_signature());
1042 bool ret = (object->bool_field(offset) == JNI_TRUE);
1043 return ret;
1044 }
1045
1046 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1047 ResourceMark rm;
1048 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1049
1050 // one by one registration natives for exception catching
1051 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1052 CHECK_JNI_EXCEPTION(env);
1053 for (int i = 0, n = method_count; i < n; ++i) {
1054 // Skip dummy entries
1055 if (method_array[i].fnPtr == NULL) continue;
1056 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1057 jthrowable throwable_obj = env->ExceptionOccurred();
1058 if (throwable_obj != NULL) {
1059 env->ExceptionClear();
1060 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1061 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1062 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1063 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1064 method_array[i].name, method_array[i].signature);
1065 }
1066 } else {
1067 // Registration failed unexpectedly.
1068 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1069 method_array[i].name, method_array[i].signature);
1070 env->UnregisterNatives(wbclass);
1071 break;
1072 }
1073 }
1074 }
1075 }
1076
1077 #define CC (char*)
1078
1079 static JNINativeMethod methods[] = {
1080 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1081 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1082 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1083 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1084 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1085 {CC"parseCommandLine",
1086 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1087 (void*) &WB_ParseCommandLine
1088 },
1089 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1090 (void*)&WB_GetCompressedOopsMaxHeapSize},
1091 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1092 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1093 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1094 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1095 #if INCLUDE_ALL_GCS
1096 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1097 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1098 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1099 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1100 #endif // INCLUDE_ALL_GCS
1101 #if INCLUDE_NMT
1102 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1103 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1104 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1105 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1106 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1107 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1108 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1109 {CC"NMTOverflowHashBucket", CC"(J)V", (void*)&WB_NMTOverflowHashBucket},
1110 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1111 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1112 #endif // INCLUDE_NMT
1113 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1114 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1115 (void*)&WB_DeoptimizeMethod },
1116 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1117 (void*)&WB_IsMethodCompiled },
1118 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1119 (void*)&WB_IsMethodCompilable},
1120 {CC"isMethodQueuedForCompilation",
1121 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1122 {CC"makeMethodNotCompilable",
1123 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1124 {CC"testSetDontInlineMethod",
1125 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1126 {CC"getMethodCompilationLevel",
1127 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1128 {CC"getMethodEntryBci",
1129 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1130 {CC"getCompileQueueSize",
1131 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1132 {CC"testSetForceInlineMethod",
1133 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1134 {CC"enqueueMethodForCompilation",
1135 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1136 {CC"clearMethodState",
1137 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1138 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1139 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1140 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1141 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1142 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1143 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1144 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1145 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1146 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1147 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1148 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1149 (void*)&WB_SetStringVMFlag},
1150 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1151 (void*)&WB_GetBooleanVMFlag},
1152 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1153 (void*)&WB_GetIntxVMFlag},
1154 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1155 (void*)&WB_GetUintxVMFlag},
1156 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1157 (void*)&WB_GetUint64VMFlag},
1158 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1159 (void*)&WB_GetSizeTVMFlag},
1160 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1161 (void*)&WB_GetDoubleVMFlag},
1162 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1163 (void*)&WB_GetStringVMFlag},
1164 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1165 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1166 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1167 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1168 {CC"allocateMetaspace",
1169 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1170 {CC"freeMetaspace",
1171 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1172 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1173 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1174 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1175 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1176 (void*)&WB_GetNMethod },
1177 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
1178 {CC"allocateCodeHeap", CC"(II)J", (void*)&WB_AllocateCodeHeap },
1179 {CC"freeCodeHeap", CC"(J)V", (void*)&WB_FreeCodeHeap },
1180 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1181 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1182 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1183 };
1184
1185 #undef CC
1186
1187 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1188 {
1189 if (WhiteBoxAPI) {
1190 // Make sure that wbclass is loaded by the null classloader
1191 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1192 Handle loader(ikh->class_loader());
1193 if (loader.is_null()) {
1194 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1195 WhiteBox::register_extended(env, wbclass, thread);
1196 WhiteBox::set_used();
1197 }
1198 }
1199 }
1200 JVM_END