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/interfaceSupport.hpp"
41 #include "runtime/os.hpp"
42 #include "runtime/vm_version.hpp"
43
44 #include "utilities/array.hpp"
45 #include "utilities/debug.hpp"
46 #include "utilities/macros.hpp"
47 #include "utilities/exceptions.hpp"
48
49 #if INCLUDE_ALL_GCS
50 #include "gc_implementation/g1/concurrentMark.hpp"
51 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
52 #include "gc_implementation/g1/heapRegionRemSet.hpp"
53 #endif // INCLUDE_ALL_GCS
54
55 #if INCLUDE_NMT
56 #include "services/mallocSiteTable.hpp"
57 #include "services/memTracker.hpp"
58 #include "utilities/nativeCallStack.hpp"
59 #endif // INCLUDE_NMT
60
61 #include "compiler/compileBroker.hpp"
62 #include "runtime/compilationPolicy.hpp"
63
64 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
65
66 #define SIZE_T_MAX_VALUE ((size_t) -1)
67
68 bool WhiteBox::_used = false;
69
70 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
71 return (jlong)(void*)JNIHandles::resolve(obj);
72 WB_END
73
74 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
75 return heapOopSize;
76 WB_END
77
78
79 class WBIsKlassAliveClosure : public KlassClosure {
80 Symbol* _name;
81 bool _found;
82 public:
83 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
84
85 void do_klass(Klass* k) {
86 if (_found) return;
87 Symbol* ksym = k->name();
88 if (ksym->fast_compare(_name) == 0) {
89 _found = true;
90 }
91 }
92
93 bool found() const {
94 return _found;
95 }
96 };
97
98 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
99 Handle h_name = JNIHandles::resolve(name);
100 if (h_name.is_null()) return false;
101 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
102 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
103
104 WBIsKlassAliveClosure closure(sym);
105 ClassLoaderDataGraph::classes_do(&closure);
106
107 return closure.found();
108 WB_END
109
110 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
111 return (jlong)Arguments::max_heap_for_compressed_oops();
112 }
113 WB_END
114
115 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
116 CollectorPolicy * p = Universe::heap()->collector_policy();
117 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
118 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
119 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
120 p->space_alignment(), p->heap_alignment());
121 }
122 WB_END
123
124 #ifndef PRODUCT
125 // Forward declaration
126 void TestReservedSpace_test();
127 void TestReserveMemorySpecial_test();
128 void TestVirtualSpace_test();
129 void TestMetaspaceAux_test();
130 #endif
131
132 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
133 #ifndef PRODUCT
134 TestReservedSpace_test();
135 TestReserveMemorySpecial_test();
136 TestVirtualSpace_test();
137 TestMetaspaceAux_test();
138 #endif
139 WB_END
140
141 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
142 size_t granularity = os::vm_allocation_granularity();
143 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
144 VirtualSpace vs;
145 vs.initialize(rhs, 50 * granularity);
146
147 //Check if constraints are complied
148 if (!( UseCompressedOops && rhs.base() != NULL &&
149 Universe::narrow_oop_base() != NULL &&
150 Universe::narrow_oop_use_implicit_null_checks() )) {
151 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
152 "\tUseCompressedOops is %d\n"
153 "\trhs.base() is "PTR_FORMAT"\n"
154 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
155 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
156 UseCompressedOops,
157 rhs.base(),
158 Universe::narrow_oop_base(),
159 Universe::narrow_oop_use_implicit_null_checks());
160 return;
161 }
162 tty->print_cr("Reading from no access area... ");
163 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
164 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
165 WB_END
166
167 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
168 size_t magnitude, size_t iterations) {
169 size_t granularity = os::vm_allocation_granularity();
170 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
171 VirtualSpace vs;
172 if (!vs.initialize(rhs, 0)) {
173 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
174 return 3;
175 }
176
177 long seed = os::random();
178 tty->print_cr("Random seed is %ld", seed);
179 os::init_random(seed);
180
181 for (size_t i = 0; i < iterations; i++) {
182
183 // Whether we will shrink or grow
184 bool shrink = os::random() % 2L == 0;
185
186 // Get random delta to resize virtual space
187 size_t delta = (size_t)os::random() % magnitude;
188
189 // If we are about to shrink virtual space below zero, then expand instead
190 if (shrink && vs.committed_size() < delta) {
191 shrink = false;
192 }
193
194 // Resizing by delta
195 if (shrink) {
196 vs.shrink_by(delta);
197 } else {
198 // If expanding fails expand_by will silently return false
199 vs.expand_by(delta, true);
200 }
201 }
202 return 0;
203 }
204
205 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
206 jlong reserved_space_size, jlong magnitude, jlong iterations))
207 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
208 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
209 iterations);
210 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
211 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
212 return 1;
213 }
214
215 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
216 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
217 if (sizeof(size_t) < sizeof(jlong)) {
218 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
219 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
220 || iterations > size_t_max_value) {
221 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
222 return 2;
223 }
224 }
225
226 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
227 (size_t) magnitude, (size_t) iterations);
228 WB_END
229
230 #if INCLUDE_ALL_GCS
231 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
232 G1CollectedHeap* g1 = G1CollectedHeap::heap();
233 oop result = JNIHandles::resolve(obj);
234 const HeapRegion* hr = g1->heap_region_containing(result);
235 return hr->isHumongous();
236 WB_END
237
238 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
239 G1CollectedHeap* g1 = G1CollectedHeap::heap();
240 size_t nr = g1->num_free_regions();
241 return (jlong)nr;
242 WB_END
243
244 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
245 G1CollectedHeap* g1 = G1CollectedHeap::heap();
246 ConcurrentMark* cm = g1->concurrent_mark();
247 return cm->concurrent_marking_in_progress();
248 WB_END
249
250 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
251 return (jint)HeapRegion::GrainBytes;
252 WB_END
253 #endif // INCLUDE_ALL_GCS
254
255 #if INCLUDE_NMT
256 // Alloc memory using the test memory type so that we can use that to see if
257 // NMT picks it up correctly
258 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
259 jlong addr = 0;
260 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
261 return addr;
262 WB_END
263
264 // Alloc memory with pseudo call stack. The test can create psudo malloc
265 // allocation site to stress the malloc tracking.
266 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
267 address pc = (address)(size_t)pseudo_stack;
268 NativeCallStack stack(&pc, 1);
269 return (jlong)os::malloc(size, mtTest, stack);
270 WB_END
271
272 // Free the memory allocated by NMTAllocTest
273 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
274 os::free((void*)(uintptr_t)mem, mtTest);
275 WB_END
276
277 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
278 jlong addr = 0;
279
280 addr = (jlong)(uintptr_t)os::reserve_memory(size);
281 MemTracker::record_virtual_memory_type((address)addr, mtTest);
282
283 return addr;
284 WB_END
285
286
287 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
288 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
289 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
290 WB_END
291
292 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
293 os::uncommit_memory((char *)(uintptr_t)addr, size);
294 WB_END
295
296 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
297 os::release_memory((char *)(uintptr_t)addr, size);
298 WB_END
299
300 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
301 return MemTracker::tracking_level() == NMT_detail;
302 WB_END
303
304 WB_ENTRY(void, WB_NMTOverflowHashBucket(JNIEnv* env, jobject o, jlong num))
305 address pc = (address)1;
306 for (jlong index = 0; index < num; index ++) {
307 NativeCallStack stack(&pc, 1);
308 os::malloc(0, mtTest, stack);
309 pc += MallocSiteTable::hash_buckets();
310 }
311 WB_END
312
313
314 #endif // INCLUDE_NMT
315
316 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
317 assert(method != NULL, "method should not be null");
318 ThreadToNativeFromVM ttn(thread);
319 return env->FromReflectedMethod(method);
320 }
321
322 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
323 MutexLockerEx mu(Compile_lock);
324 CodeCache::mark_all_nmethods_for_deoptimization();
325 VM_Deoptimize op;
326 VMThread::execute(&op);
327 WB_END
328
329 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
330 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
331 int result = 0;
332 CHECK_JNI_EXCEPTION_(env, result);
333 MutexLockerEx mu(Compile_lock);
334 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
335 nmethod* code;
336 if (is_osr) {
337 int bci = InvocationEntryBci;
338 while ((code = mh->lookup_osr_nmethod_for(bci, CompLevel_none, false)) != NULL) {
339 code->mark_for_deoptimization();
340 ++result;
341 bci = code->osr_entry_bci() + 1;
342 }
343 } else {
344 code = mh->code();
345 }
346 if (code != NULL) {
347 code->mark_for_deoptimization();
348 ++result;
349 }
350 result += CodeCache::mark_for_deoptimization(mh());
351 if (result > 0) {
352 VM_Deoptimize op;
353 VMThread::execute(&op);
354 }
355 return result;
356 WB_END
357
358 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
359 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
360 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
361 MutexLockerEx mu(Compile_lock);
362 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
363 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
364 if (code == NULL) {
365 return JNI_FALSE;
366 }
367 return (code->is_alive() && !code->is_marked_for_deoptimization());
368 WB_END
369
370 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
371 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
372 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
373 MutexLockerEx mu(Compile_lock);
374 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
375 if (is_osr) {
376 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
377 } else {
378 return CompilationPolicy::can_be_compiled(mh, comp_level);
379 }
380 WB_END
381
382 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
383 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
384 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
385 MutexLockerEx mu(Compile_lock);
386 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
387 return mh->queued_for_compilation();
388 WB_END
389
390 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
391 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
392 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
393 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
394 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
395 return (code != NULL ? code->comp_level() : CompLevel_none);
396 WB_END
397
398 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
399 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
400 CHECK_JNI_EXCEPTION(env);
401 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
402 if (is_osr) {
403 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
404 } else {
405 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
406 }
407 WB_END
408
409 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
410 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
411 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
412 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
413 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
414 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
415 WB_END
416
417 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
418 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
419 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
420 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
421 bool result = mh->dont_inline();
422 mh->set_dont_inline(value == JNI_TRUE);
423 return result;
424 WB_END
425
426 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
427 if (comp_level == CompLevel_any) {
428 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
429 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
430 } else {
431 return CompileBroker::queue_size(comp_level);
432 }
433 WB_END
434
435 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
436 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
437 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
438 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
439 bool result = mh->force_inline();
440 mh->set_force_inline(value == JNI_TRUE);
441 return result;
442 WB_END
443
444 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
445 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
446 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
447 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
448 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
449 MutexLockerEx mu(Compile_lock);
450 return (mh->queued_for_compilation() || nm != NULL);
451 WB_END
452
453 class VM_WhiteBoxOperation : public VM_Operation {
454 public:
455 VM_WhiteBoxOperation() { }
456 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
457 bool allow_nested_vm_operations() const { return true; }
458 };
459
460 class AlwaysFalseClosure : public BoolObjectClosure {
461 public:
462 bool do_object_b(oop p) { return false; }
463 };
464
465 static AlwaysFalseClosure always_false;
466
467 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation {
468 public:
469 VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { }
470 void doit() {
471 _mdo->clean_method_data(&always_false);
472 }
473 private:
474 MethodData* _mdo;
475 };
476
477 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
478 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
479 CHECK_JNI_EXCEPTION(env);
480 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
481 MutexLockerEx mu(Compile_lock);
482 MethodData* mdo = mh->method_data();
483 MethodCounters* mcs = mh->method_counters();
484
485 if (mdo != NULL) {
486 mdo->init();
487 ResourceMark rm;
488 int arg_count = mdo->method()->size_of_parameters();
489 for (int i = 0; i < arg_count; i++) {
490 mdo->set_arg_modified(i, 0);
491 }
492 VM_WhiteBoxCleanMethodData op(mdo);
493 VMThread::execute(&op);
494 }
495
496 mh->clear_not_c1_compilable();
497 mh->clear_not_c2_compilable();
498 mh->clear_not_c2_osr_compilable();
499 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
500 if (mcs != NULL) {
501 mcs->backedge_counter()->init();
502 mcs->invocation_counter()->init();
503 mcs->set_interpreter_invocation_count(0);
504 mcs->set_interpreter_throwout_count(0);
505
506 #ifdef TIERED
507 mcs->set_rate(0.0F);
508 mh->set_prev_event_count(0);
509 mh->set_prev_time(0);
510 #endif
511 }
512 WB_END
513
514 template <typename T>
515 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*)) {
516 if (name == NULL) {
517 return false;
518 }
519 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
520 const char* flag_name = env->GetStringUTFChars(name, NULL);
521 bool result = (*TAt)(flag_name, value);
522 env->ReleaseStringUTFChars(name, flag_name);
523 return result;
524 }
525
526 template <typename T>
527 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
528 if (name == NULL) {
529 return false;
530 }
531 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
532 const char* flag_name = env->GetStringUTFChars(name, NULL);
533 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
534 env->ReleaseStringUTFChars(name, flag_name);
535 return result;
536 }
537
538 template <typename T>
539 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
540 ResourceMark rm(thread);
541 jclass clazz = env->FindClass(name->as_C_string());
542 CHECK_JNI_EXCEPTION_(env, NULL);
543 jmethodID methodID = env->GetStaticMethodID(clazz,
544 vmSymbols::valueOf_name()->as_C_string(),
545 sig->as_C_string());
546 CHECK_JNI_EXCEPTION_(env, NULL);
547 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
548 CHECK_JNI_EXCEPTION_(env, NULL);
549 return result;
550 }
551
552 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
553 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
554 }
555 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
556 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
557 }
558 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
559 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
560 }
561 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
562 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
563 }*/
564 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
565 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
566 }
567
568 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
569 bool result;
570 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
571 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
572 return booleanBox(thread, env, result);
573 }
574 return NULL;
575 WB_END
576
577 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
578 intx result;
579 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
580 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
581 return longBox(thread, env, result);
582 }
583 return NULL;
584 WB_END
585
586 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
587 uintx result;
588 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
589 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
590 return longBox(thread, env, result);
591 }
592 return NULL;
593 WB_END
594
595 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
596 uint64_t result;
597 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
598 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
599 return longBox(thread, env, result);
600 }
601 return NULL;
602 WB_END
603
604 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
605 uintx result;
606 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
607 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
608 return longBox(thread, env, result);
609 }
610 return NULL;
611 WB_END
612
613 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
614 double result;
615 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
616 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
617 return doubleBox(thread, env, result);
618 }
619 return NULL;
620 WB_END
621
622 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
623 ccstr ccstrResult;
624 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
625 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
626 jstring result = env->NewStringUTF(ccstrResult);
627 CHECK_JNI_EXCEPTION_(env, NULL);
628 return result;
629 }
630 return NULL;
631 WB_END
632
633 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
634 bool result = value == JNI_TRUE ? true : false;
635 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
636 WB_END
637
638 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
639 intx result = value;
640 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
641 WB_END
642
643 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
644 uintx result = value;
645 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
646 WB_END
647
648 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
649 uint64_t result = value;
650 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
651 WB_END
652
653 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
654 size_t result = value;
655 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
656 WB_END
657
658 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
659 double result = value;
660 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
661 WB_END
662
663 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
664 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
665 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
666 ccstr ccstrResult = ccstrValue;
667 bool needFree;
668 {
669 ThreadInVMfromNative ttvfn(thread); // back to VM
670 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
671 }
672 if (value != NULL) {
673 env->ReleaseStringUTFChars(value, ccstrValue);
674 }
675 if (needFree) {
676 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
677 }
678 WB_END
679
680
681 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
682 ResourceMark rm(THREAD);
683 int len;
684 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
685 return (StringTable::lookup(name, len) != NULL);
686 WB_END
687
688 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
689 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
690 Universe::heap()->collect(GCCause::_last_ditch_collection);
691 WB_END
692
693
694 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
695 // static+volatile in order to force the read to happen
696 // (not be eliminated by the compiler)
697 static char c;
698 static volatile char* p;
699
700 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
701 if (p == NULL) {
702 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
703 }
704
705 c = *p;
706 WB_END
707
708 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
709 const char* cpu_features = VM_Version::cpu_features();
710 ThreadToNativeFromVM ttn(thread);
711 jstring features_string = env->NewStringUTF(cpu_features);
712
713 CHECK_JNI_EXCEPTION_(env, NULL);
714
715 return features_string;
716 WB_END
717
718
719 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
720 ResourceMark rm(THREAD);
721 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
722 CHECK_JNI_EXCEPTION_(env, NULL);
723 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
724 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
725 jobjectArray result = NULL;
726 if (code == NULL) {
727 return result;
728 }
729 int insts_size = code->insts_size();
730
731 ThreadToNativeFromVM ttn(thread);
732 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
733 CHECK_JNI_EXCEPTION_(env, NULL);
734 result = env->NewObjectArray(2, clazz, NULL);
735 if (result == NULL) {
736 return result;
737 }
738
739 jobject obj = integerBox(thread, env, code->comp_level());
740 CHECK_JNI_EXCEPTION_(env, NULL);
741 env->SetObjectArrayElement(result, 0, obj);
742
743 jbyteArray insts = env->NewByteArray(insts_size);
744 CHECK_JNI_EXCEPTION_(env, NULL);
745 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
746 env->SetObjectArrayElement(result, 1, insts);
747
748 return result;
749 WB_END
750
751 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
752 return (jlong) Thread::current()->stack_size();
753 WB_END
754
755 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
756 JavaThread* t = JavaThread::current();
757 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
758 WB_END
759
760 int WhiteBox::array_bytes_to_length(size_t bytes) {
761 return Array<u1>::bytes_to_length(bytes);
762 }
763
764 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
765 if (size < 0) {
766 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
767 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
768 }
769
770 oop class_loader_oop = JNIHandles::resolve(class_loader);
771 ClassLoaderData* cld = class_loader_oop != NULL
772 ? java_lang_ClassLoader::loader_data(class_loader_oop)
773 : ClassLoaderData::the_null_class_loader_data();
774
775 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
776
777 return (jlong)(uintptr_t)metadata;
778 WB_END
779
780 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
781 oop class_loader_oop = JNIHandles::resolve(class_loader);
782 ClassLoaderData* cld = class_loader_oop != NULL
783 ? java_lang_ClassLoader::loader_data(class_loader_oop)
784 : ClassLoaderData::the_null_class_loader_data();
785
786 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
787 WB_END
788
789 //Some convenience methods to deal with objects from java
790 int WhiteBox::offset_for_field(const char* field_name, oop object,
791 Symbol* signature_symbol) {
792 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
793 Thread* THREAD = Thread::current();
794
795 //Get the class of our object
796 Klass* arg_klass = object->klass();
797 //Turn it into an instance-klass
798 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
799
800 //Create symbols to look for in the class
801 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
802 THREAD);
803
804 //To be filled in with an offset of the field we're looking for
805 fieldDescriptor fd;
806
807 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
808 if (res == NULL) {
809 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
810 name_symbol->as_C_string());
811 fatal("Invalid layout of preloaded class");
812 }
813
814 //fetch the field at the offset we've found
815 int dest_offset = fd.offset();
816
817 return dest_offset;
818 }
819
820
821 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
822 int offset = offset_for_field(field_name, object,
823 vmSymbols::string_signature());
824 oop string = object->obj_field(offset);
825 if (string == NULL) {
826 return NULL;
827 }
828 const char* ret = java_lang_String::as_utf8_string(string);
829 return ret;
830 }
831
832 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
833 int offset =
834 offset_for_field(field_name, object, vmSymbols::bool_signature());
835 bool ret = (object->bool_field(offset) == JNI_TRUE);
836 return ret;
837 }
838
839
840 #define CC (char*)
841
842 static JNINativeMethod methods[] = {
843 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
844 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
845 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
846 {CC"parseCommandLine",
847 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
848 (void*) &WB_ParseCommandLine
849 },
850 {CC"getCompressedOopsMaxHeapSize", CC"()J",
851 (void*)&WB_GetCompressedOopsMaxHeapSize},
852 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
853 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
854 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
855 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
856 #if INCLUDE_ALL_GCS
857 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
858 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
859 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
860 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
861 #endif // INCLUDE_ALL_GCS
862 #if INCLUDE_NMT
863 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
864 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
865 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
866 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
867 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
868 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
869 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
870 {CC"NMTOverflowHashBucket", CC"(J)V", (void*)&WB_NMTOverflowHashBucket},
871 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
872 #endif // INCLUDE_NMT
873 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
874 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
875 (void*)&WB_DeoptimizeMethod },
876 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
877 (void*)&WB_IsMethodCompiled },
878 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
879 (void*)&WB_IsMethodCompilable},
880 {CC"isMethodQueuedForCompilation",
881 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
882 {CC"makeMethodNotCompilable",
883 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
884 {CC"testSetDontInlineMethod",
885 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
886 {CC"getMethodCompilationLevel",
887 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
888 {CC"getMethodEntryBci",
889 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
890 {CC"getCompileQueueSize",
891 CC"(I)I", (void*)&WB_GetCompileQueueSize},
892 {CC"testSetForceInlineMethod",
893 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
894 {CC"enqueueMethodForCompilation",
895 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
896 {CC"clearMethodState",
897 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
898 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
899 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
900 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
901 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
902 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
903 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
904 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
905 (void*)&WB_SetStringVMFlag},
906 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
907 (void*)&WB_GetBooleanVMFlag},
908 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
909 (void*)&WB_GetIntxVMFlag},
910 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
911 (void*)&WB_GetUintxVMFlag},
912 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
913 (void*)&WB_GetUint64VMFlag},
914 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
915 (void*)&WB_GetSizeTVMFlag},
916 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
917 (void*)&WB_GetDoubleVMFlag},
918 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
919 (void*)&WB_GetStringVMFlag},
920 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
921 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
922 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
923 {CC"allocateMetaspace",
924 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
925 {CC"freeMetaspace",
926 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
927 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
928 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
929 (void*)&WB_GetNMethod },
930 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
931 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
932 };
933
934 #undef CC
935
936 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
937 {
938 if (WhiteBoxAPI) {
939 // Make sure that wbclass is loaded by the null classloader
940 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
941 Handle loader(ikh->class_loader());
942 if (loader.is_null()) {
943 ResourceMark rm;
944 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
945 bool result = true;
946 // one by one registration natives for exception catching
947 jclass exceptionKlass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
948 CHECK_JNI_EXCEPTION(env);
949 for (int i = 0, n = sizeof(methods) / sizeof(methods[0]); i < n; ++i) {
950 if (env->RegisterNatives(wbclass, methods + i, 1) != 0) {
951 result = false;
952 jthrowable throwable_obj = env->ExceptionOccurred();
953 if (throwable_obj != NULL) {
954 env->ExceptionClear();
955 if (env->IsInstanceOf(throwable_obj, exceptionKlass)) {
956 // j.l.NoSuchMethodError is thrown when a method can't be found or a method is not native
957 // ignoring the exception
958 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s", methods[i].name, methods[i].signature);
959 }
960 } else {
961 // register is failed w/o exception or w/ unexpected exception
962 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered", methods[i].name, methods[i].signature);
963 env->UnregisterNatives(wbclass);
964 break;
965 }
966 }
967 }
968
969 if (result) {
970 WhiteBox::set_used();
971 }
972 }
973 }
974 }
975 JVM_END