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