1 /*
2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26
27 #include <new>
28
29 #include "code/codeCache.hpp"
30 #include "memory/metadataFactory.hpp"
31 #include "memory/universe.hpp"
32 #include "oops/oop.inline.hpp"
33
34 #include "classfile/stringTable.hpp"
35 #include "classfile/classLoaderData.hpp"
36
37 #include "prims/whitebox.hpp"
38 #include "prims/wbtestmethods/parserTests.hpp"
39
40 #include "runtime/thread.hpp"
41 #include "runtime/arguments.hpp"
42 #include "runtime/deoptimization.hpp"
43 #include "runtime/interfaceSupport.hpp"
44 #include "runtime/os.hpp"
45 #include "runtime/vm_version.hpp"
46 #include "runtime/sweeper.hpp"
47
48 #include "utilities/array.hpp"
49 #include "utilities/debug.hpp"
50 #include "utilities/macros.hpp"
51 #include "utilities/exceptions.hpp"
52
53 #if INCLUDE_ALL_GCS
54 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
55 #include "gc_implementation/g1/concurrentMark.hpp"
56 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
57 #include "gc_implementation/g1/heapRegionRemSet.hpp"
58 #endif // INCLUDE_ALL_GCS
59
60 #if INCLUDE_NMT
61 #include "services/mallocSiteTable.hpp"
62 #include "services/memTracker.hpp"
63 #include "utilities/nativeCallStack.hpp"
64 #endif // INCLUDE_NMT
65
66 #include "compiler/compileBroker.hpp"
67 #include "runtime/compilationPolicy.hpp"
68
69 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
70
71 #define SIZE_T_MAX_VALUE ((size_t) -1)
72
73 bool WhiteBox::_used = false;
74 volatile bool WhiteBox::compilation_locked = false;
75
76 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
77 return (jlong)(void*)JNIHandles::resolve(obj);
78 WB_END
79
80 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
81 return heapOopSize;
82 WB_END
83
84
85 class WBIsKlassAliveClosure : public KlassClosure {
86 Symbol* _name;
87 bool _found;
88 public:
89 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
90
91 void do_klass(Klass* k) {
92 if (_found) return;
93 Symbol* ksym = k->name();
94 if (ksym->fast_compare(_name) == 0) {
95 _found = true;
96 }
97 }
98
99 bool found() const {
100 return _found;
101 }
102 };
103
104 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
105 Handle h_name = JNIHandles::resolve(name);
106 if (h_name.is_null()) return false;
107 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
108 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
109
110 WBIsKlassAliveClosure closure(sym);
111 ClassLoaderDataGraph::classes_do(&closure);
112
113 return closure.found();
114 WB_END
115
116 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
117 return (jlong)Arguments::max_heap_for_compressed_oops();
118 }
119 WB_END
120
121 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
122 CollectorPolicy * p = Universe::heap()->collector_policy();
123 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
124 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
125 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
126 p->space_alignment(), p->heap_alignment());
127 }
128 WB_END
129
130 #ifndef PRODUCT
131 // Forward declaration
132 void TestReservedSpace_test();
133 void TestReserveMemorySpecial_test();
134 void TestVirtualSpace_test();
135 void TestMetaspaceAux_test();
136 #endif
137
138 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
139 #ifndef PRODUCT
140 TestReservedSpace_test();
141 TestReserveMemorySpecial_test();
142 TestVirtualSpace_test();
143 TestMetaspaceAux_test();
144 #endif
145 WB_END
146
147 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
148 size_t granularity = os::vm_allocation_granularity();
149 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
150 VirtualSpace vs;
151 vs.initialize(rhs, 50 * granularity);
152
153 //Check if constraints are complied
154 if (!( UseCompressedOops && rhs.base() != NULL &&
155 Universe::narrow_oop_base() != NULL &&
156 Universe::narrow_oop_use_implicit_null_checks() )) {
157 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
158 "\tUseCompressedOops is %d\n"
159 "\trhs.base() is "PTR_FORMAT"\n"
160 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
161 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
162 UseCompressedOops,
163 rhs.base(),
164 Universe::narrow_oop_base(),
165 Universe::narrow_oop_use_implicit_null_checks());
166 return;
167 }
168 tty->print_cr("Reading from no access area... ");
169 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
170 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
171 WB_END
172
173 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
174 size_t magnitude, size_t iterations) {
175 size_t granularity = os::vm_allocation_granularity();
176 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
177 VirtualSpace vs;
178 if (!vs.initialize(rhs, 0)) {
179 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
180 return 3;
181 }
182
183 long seed = os::random();
184 tty->print_cr("Random seed is %ld", seed);
185 os::init_random(seed);
186
187 for (size_t i = 0; i < iterations; i++) {
188
189 // Whether we will shrink or grow
190 bool shrink = os::random() % 2L == 0;
191
192 // Get random delta to resize virtual space
193 size_t delta = (size_t)os::random() % magnitude;
194
195 // If we are about to shrink virtual space below zero, then expand instead
196 if (shrink && vs.committed_size() < delta) {
197 shrink = false;
198 }
199
200 // Resizing by delta
201 if (shrink) {
202 vs.shrink_by(delta);
203 } else {
204 // If expanding fails expand_by will silently return false
205 vs.expand_by(delta, true);
206 }
207 }
208 return 0;
209 }
210
211 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
212 jlong reserved_space_size, jlong magnitude, jlong iterations))
213 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
214 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
215 iterations);
216 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
217 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
218 return 1;
219 }
220
221 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
222 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
223 if (sizeof(size_t) < sizeof(jlong)) {
224 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
225 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
226 || iterations > size_t_max_value) {
227 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
228 return 2;
229 }
230 }
231
232 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
233 (size_t) magnitude, (size_t) iterations);
234 WB_END
235
236 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
237 oop p = JNIHandles::resolve(obj);
238 #if INCLUDE_ALL_GCS
239 if (UseG1GC) {
240 G1CollectedHeap* g1 = G1CollectedHeap::heap();
241 const HeapRegion* hr = g1->heap_region_containing(p);
242 if (hr == NULL) {
243 return false;
244 }
245 return !(hr->is_young());
246 } else if (UseParallelGC) {
247 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
248 return !psh->is_in_young(p);
249 }
250 #endif // INCLUDE_ALL_GCS
251 GenCollectedHeap* gch = GenCollectedHeap::heap();
252 return !gch->is_in_young(p);
253 WB_END
254
255 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
256 oop p = JNIHandles::resolve(obj);
257 return p->size() * HeapWordSize;
258 WB_END
259
260 #if INCLUDE_ALL_GCS
261 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
262 G1CollectedHeap* g1 = G1CollectedHeap::heap();
263 oop result = JNIHandles::resolve(obj);
264 const HeapRegion* hr = g1->heap_region_containing(result);
265 return hr->is_humongous();
266 WB_END
267
268 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
269 G1CollectedHeap* g1 = G1CollectedHeap::heap();
270 size_t nr = g1->num_free_regions();
271 return (jlong)nr;
272 WB_END
273
274 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
275 G1CollectedHeap* g1 = G1CollectedHeap::heap();
276 ConcurrentMark* cm = g1->concurrent_mark();
277 return cm->concurrent_marking_in_progress();
278 WB_END
279
280 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
281 return (jint)HeapRegion::GrainBytes;
282 WB_END
283 #endif // INCLUDE_ALL_GCS
284
285 #if INCLUDE_NMT
286 // Alloc memory using the test memory type so that we can use that to see if
287 // NMT picks it up correctly
288 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
289 jlong addr = 0;
290 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
291 return addr;
292 WB_END
293
294 // Alloc memory with pseudo call stack. The test can create psudo malloc
295 // allocation site to stress the malloc tracking.
296 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
297 address pc = (address)(size_t)pseudo_stack;
298 NativeCallStack stack(&pc, 1);
299 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
300 WB_END
301
302 // Free the memory allocated by NMTAllocTest
303 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
304 os::free((void*)(uintptr_t)mem, mtTest);
305 WB_END
306
307 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
308 jlong addr = 0;
309
310 addr = (jlong)(uintptr_t)os::reserve_memory(size);
311 MemTracker::record_virtual_memory_type((address)addr, mtTest);
312
313 return addr;
314 WB_END
315
316 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
317 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
318 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
319 WB_END
320
321 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
322 os::uncommit_memory((char *)(uintptr_t)addr, size);
323 WB_END
324
325 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
326 os::release_memory((char *)(uintptr_t)addr, size);
327 WB_END
328
329 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
330 return MemTracker::tracking_level() == NMT_detail;
331 WB_END
332
333 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
334 // Test that we can downgrade NMT levels but not upgrade them.
335 if (MemTracker::tracking_level() == NMT_off) {
336 MemTracker::transition_to(NMT_off);
337 return MemTracker::tracking_level() == NMT_off;
338 } else {
339 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
340 MemTracker::transition_to(NMT_summary);
341 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
342
343 // Can't go to detail once NMT is set to summary.
344 MemTracker::transition_to(NMT_detail);
345 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
346
347 // Shutdown sets tracking level to minimal.
348 MemTracker::shutdown();
349 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
350
351 // Once the tracking level is minimal, we cannot increase to summary.
352 // The code ignores this request instead of asserting because if the malloc site
353 // table overflows in another thread, it tries to change the code to summary.
354 MemTracker::transition_to(NMT_summary);
355 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
356
357 // Really can never go up to detail, verify that the code would never do this.
358 MemTracker::transition_to(NMT_detail);
359 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
360 return MemTracker::tracking_level() == NMT_minimal;
361 }
362 WB_END
363
364 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
365 int hash_size = MallocSiteTable::hash_buckets();
366 assert(hash_size > 0, "NMT hash_size should be > 0");
367 return (jint)hash_size;
368 WB_END
369 #endif // INCLUDE_NMT
370
371 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
372 assert(method != NULL, "method should not be null");
373 ThreadToNativeFromVM ttn(thread);
374 return env->FromReflectedMethod(method);
375 }
376
377 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
378 MutexLockerEx mu(Compile_lock);
379 CodeCache::mark_all_nmethods_for_deoptimization();
380 VM_Deoptimize op;
381 VMThread::execute(&op);
382 WB_END
383
384 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
385 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
386 int result = 0;
387 CHECK_JNI_EXCEPTION_(env, result);
388 MutexLockerEx mu(Compile_lock);
389 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
390 if (is_osr) {
391 result += mh->mark_osr_nmethods();
392 } else if (mh->code() != NULL) {
393 mh->code()->mark_for_deoptimization();
394 ++result;
395 }
396 result += CodeCache::mark_for_deoptimization(mh());
397 if (result > 0) {
398 VM_Deoptimize op;
399 VMThread::execute(&op);
400 }
401 return result;
402 WB_END
403
404 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
405 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
406 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
407 MutexLockerEx mu(Compile_lock);
408 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
409 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
410 if (code == NULL) {
411 return JNI_FALSE;
412 }
413 return (code->is_alive() && !code->is_marked_for_deoptimization());
414 WB_END
415
416 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
417 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
418 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
419 MutexLockerEx mu(Compile_lock);
420 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
421 if (is_osr) {
422 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
423 } else {
424 return CompilationPolicy::can_be_compiled(mh, comp_level);
425 }
426 WB_END
427
428 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
429 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
430 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
431 MutexLockerEx mu(Compile_lock);
432 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
433 return mh->queued_for_compilation();
434 WB_END
435
436 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
437 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
438 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
439 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
440 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
441 return (code != NULL ? code->comp_level() : CompLevel_none);
442 WB_END
443
444 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
445 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
446 CHECK_JNI_EXCEPTION(env);
447 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
448 if (is_osr) {
449 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
450 } else {
451 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
452 }
453 WB_END
454
455 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
456 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
457 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
458 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
459 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
460 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
461 WB_END
462
463 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
464 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
465 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
466 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
467 bool result = mh->dont_inline();
468 mh->set_dont_inline(value == JNI_TRUE);
469 return result;
470 WB_END
471
472 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
473 if (comp_level == CompLevel_any) {
474 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
475 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
476 } else {
477 return CompileBroker::queue_size(comp_level);
478 }
479 WB_END
480
481 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
482 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
483 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
484 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
485 bool result = mh->force_inline();
486 mh->set_force_inline(value == JNI_TRUE);
487 return result;
488 WB_END
489
490 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
491 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
492 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
493 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
494 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
495 MutexLockerEx mu(Compile_lock);
496 return (mh->queued_for_compilation() || nm != NULL);
497 WB_END
498
499 class VM_WhiteBoxOperation : public VM_Operation {
500 public:
501 VM_WhiteBoxOperation() { }
502 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
503 bool allow_nested_vm_operations() const { return true; }
504 };
505
506 class AlwaysFalseClosure : public BoolObjectClosure {
507 public:
508 bool do_object_b(oop p) { return false; }
509 };
510
511 static AlwaysFalseClosure always_false;
512
513 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
514 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
515 CHECK_JNI_EXCEPTION(env);
516 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
517 MutexLockerEx mu(Compile_lock);
518 MethodData* mdo = mh->method_data();
519 MethodCounters* mcs = mh->method_counters();
520
521 if (mdo != NULL) {
522 mdo->init();
523 ResourceMark rm;
524 int arg_count = mdo->method()->size_of_parameters();
525 for (int i = 0; i < arg_count; i++) {
526 mdo->set_arg_modified(i, 0);
527 }
528 MutexLockerEx mu(mdo->extra_data_lock());
529 mdo->clean_method_data(&always_false);
530 }
531
532 mh->clear_not_c1_compilable();
533 mh->clear_not_c2_compilable();
534 mh->clear_not_c2_osr_compilable();
535 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
536 if (mcs != NULL) {
537 mcs->backedge_counter()->init();
538 mcs->invocation_counter()->init();
539 mcs->set_interpreter_invocation_count(0);
540 mcs->set_interpreter_throwout_count(0);
541
542 #ifdef TIERED
543 mcs->set_rate(0.0F);
544 mh->set_prev_event_count(0);
545 mh->set_prev_time(0);
546 #endif
547 }
548 WB_END
549
550 template <typename T>
551 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
552 if (name == NULL) {
553 return false;
554 }
555 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
556 const char* flag_name = env->GetStringUTFChars(name, NULL);
557 bool result = (*TAt)(flag_name, value, true, true);
558 env->ReleaseStringUTFChars(name, flag_name);
559 return result;
560 }
561
562 template <typename T>
563 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
564 if (name == NULL) {
565 return false;
566 }
567 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
568 const char* flag_name = env->GetStringUTFChars(name, NULL);
569 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
570 env->ReleaseStringUTFChars(name, flag_name);
571 return result;
572 }
573
574 template <typename T>
575 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
576 ResourceMark rm(thread);
577 jclass clazz = env->FindClass(name->as_C_string());
578 CHECK_JNI_EXCEPTION_(env, NULL);
579 jmethodID methodID = env->GetStaticMethodID(clazz,
580 vmSymbols::valueOf_name()->as_C_string(),
581 sig->as_C_string());
582 CHECK_JNI_EXCEPTION_(env, NULL);
583 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
584 CHECK_JNI_EXCEPTION_(env, NULL);
585 return result;
586 }
587
588 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
589 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
590 }
591 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
592 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
593 }
594 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
595 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
596 }
597 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
598 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
599 }*/
600 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
601 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
602 }
603
604 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
605 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
606 const char* flag_name = env->GetStringUTFChars(name, NULL);
607 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
608 env->ReleaseStringUTFChars(name, flag_name);
609 return result;
610 }
611
612 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
613 Flag* flag = getVMFlag(thread, env, name);
614 return (flag != NULL) && flag->is_constant_in_binary();
615 WB_END
616
617 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
618 Flag* flag = getVMFlag(thread, env, name);
619 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
620 WB_END
621
622 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
623 bool result;
624 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
625 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
626 return booleanBox(thread, env, result);
627 }
628 return NULL;
629 WB_END
630
631 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
632 intx result;
633 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
634 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
635 return longBox(thread, env, result);
636 }
637 return NULL;
638 WB_END
639
640 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
641 uintx result;
642 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
643 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
644 return longBox(thread, env, result);
645 }
646 return NULL;
647 WB_END
648
649 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
650 uint64_t result;
651 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
652 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
653 return longBox(thread, env, result);
654 }
655 return NULL;
656 WB_END
657
658 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
659 uintx result;
660 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
661 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
662 return longBox(thread, env, result);
663 }
664 return NULL;
665 WB_END
666
667 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
668 double result;
669 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
670 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
671 return doubleBox(thread, env, result);
672 }
673 return NULL;
674 WB_END
675
676 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
677 ccstr ccstrResult;
678 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
679 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
680 jstring result = env->NewStringUTF(ccstrResult);
681 CHECK_JNI_EXCEPTION_(env, NULL);
682 return result;
683 }
684 return NULL;
685 WB_END
686
687 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
688 bool result = value == JNI_TRUE ? true : false;
689 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
690 WB_END
691
692 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
693 intx result = value;
694 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
695 WB_END
696
697 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
698 uintx result = value;
699 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
700 WB_END
701
702 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
703 uint64_t result = value;
704 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
705 WB_END
706
707 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
708 size_t result = value;
709 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
710 WB_END
711
712 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
713 double result = value;
714 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
715 WB_END
716
717 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
718 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
719 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
720 ccstr ccstrResult = ccstrValue;
721 bool needFree;
722 {
723 ThreadInVMfromNative ttvfn(thread); // back to VM
724 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
725 }
726 if (value != NULL) {
727 env->ReleaseStringUTFChars(value, ccstrValue);
728 }
729 if (needFree) {
730 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
731 }
732 WB_END
733
734
735 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
736 WhiteBox::compilation_locked = true;
737 WB_END
738
739 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
740 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
741 WhiteBox::compilation_locked = false;
742 mo.notify_all();
743 WB_END
744
745 void WhiteBox::force_sweep() {
746 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
747 {
748 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
749 NMethodSweeper::_should_sweep = true;
750 }
751 NMethodSweeper::possibly_sweep();
752 }
753
754 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
755 WhiteBox::force_sweep();
756 WB_END
757
758 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
759 ResourceMark rm(THREAD);
760 int len;
761 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
762 return (StringTable::lookup(name, len) != NULL);
763 WB_END
764
765 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
766 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
767 Universe::heap()->collect(GCCause::_last_ditch_collection);
768 #if INCLUDE_ALL_GCS
769 if (UseG1GC) {
770 // Needs to be cleared explicitly for G1
771 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
772 }
773 #endif // INCLUDE_ALL_GCS
774 WB_END
775
776 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
777 Universe::heap()->collect(GCCause::_wb_young_gc);
778 WB_END
779
780 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
781 // static+volatile in order to force the read to happen
782 // (not be eliminated by the compiler)
783 static char c;
784 static volatile char* p;
785
786 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
787 if (p == NULL) {
788 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
789 }
790
791 c = *p;
792 WB_END
793
794 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
795 const char* cpu_features = VM_Version::cpu_features();
796 ThreadToNativeFromVM ttn(thread);
797 jstring features_string = env->NewStringUTF(cpu_features);
798
799 CHECK_JNI_EXCEPTION_(env, NULL);
800
801 return features_string;
802 WB_END
803
804 int WhiteBox::get_blob_type(const CodeBlob* code) {
805 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
806 return CodeCache::get_code_heap(code)->code_blob_type();
807 }
808
809 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
810 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
811 return CodeCache::get_code_heap(blob_type);
812 }
813
814 struct CodeBlobStub {
815 CodeBlobStub(const CodeBlob* blob) :
816 name(os::strdup(blob->name())),
817 size(blob->size()),
818 blob_type(WhiteBox::get_blob_type(blob)) { }
819 ~CodeBlobStub() { os::free((void*) name); }
820 const char* const name;
821 const int size;
822 const int blob_type;
823 };
824
825 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
826 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
827 CHECK_JNI_EXCEPTION_(env, NULL);
828 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
829
830 jstring name = env->NewStringUTF(cb->name);
831 CHECK_JNI_EXCEPTION_(env, NULL);
832 env->SetObjectArrayElement(result, 0, name);
833
834 jobject obj = integerBox(thread, env, cb->size);
835 CHECK_JNI_EXCEPTION_(env, NULL);
836 env->SetObjectArrayElement(result, 1, obj);
837
838 obj = integerBox(thread, env, cb->blob_type);
839 CHECK_JNI_EXCEPTION_(env, NULL);
840 env->SetObjectArrayElement(result, 2, obj);
841
842 return result;
843 }
844
845 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
846 ResourceMark rm(THREAD);
847 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
848 CHECK_JNI_EXCEPTION_(env, NULL);
849 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
850 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
851 jobjectArray result = NULL;
852 if (code == NULL) {
853 return result;
854 }
855 int insts_size = code->insts_size();
856
857 ThreadToNativeFromVM ttn(thread);
858 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
859 CHECK_JNI_EXCEPTION_(env, NULL);
860 result = env->NewObjectArray(4, clazz, NULL);
861 if (result == NULL) {
862 return result;
863 }
864
865 CodeBlobStub stub(code);
866 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
867 env->SetObjectArrayElement(result, 0, codeBlob);
868
869 jobject level = integerBox(thread, env, code->comp_level());
870 CHECK_JNI_EXCEPTION_(env, NULL);
871 env->SetObjectArrayElement(result, 1, level);
872
873 jbyteArray insts = env->NewByteArray(insts_size);
874 CHECK_JNI_EXCEPTION_(env, NULL);
875 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
876 env->SetObjectArrayElement(result, 2, insts);
877
878 jobject id = integerBox(thread, env, code->compile_id());
879 CHECK_JNI_EXCEPTION_(env, NULL);
880 env->SetObjectArrayElement(result, 3, id);
881
882 return result;
883 WB_END
884
885 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
886 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
887 BufferBlob* blob;
888 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
889 if (full_size < size) {
890 full_size += round_to(size - full_size, oopSize);
891 }
892 {
893 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
894 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
895 }
896 // Track memory usage statistic after releasing CodeCache_lock
897 MemoryService::track_code_cache_memory_usage();
898 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
899 return blob;
900 }
901
902 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
903 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
904 WB_END
905
906 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
907 BufferBlob::free((BufferBlob*) addr);
908 WB_END
909
910 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
911 ResourceMark rm;
912 GrowableArray<CodeBlobStub*> blobs;
913 {
914 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
915 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
916 if (heap == NULL) {
917 return NULL;
918 }
919 for (CodeBlob* cb = (CodeBlob*) heap->first();
920 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
921 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
922 new (stub) CodeBlobStub(cb);
923 blobs.append(stub);
924 }
925 }
926 if (blobs.length() == 0) {
927 return NULL;
928 }
929 ThreadToNativeFromVM ttn(thread);
930 jobjectArray result = NULL;
931 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
932 CHECK_JNI_EXCEPTION_(env, NULL);
933 result = env->NewObjectArray(blobs.length(), clazz, NULL);
934 if (result == NULL) {
935 return result;
936 }
937 int i = 0;
938 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
939 it != blobs.end(); ++it) {
940 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
941 env->SetObjectArrayElement(result, i, obj);
942 ++i;
943 }
944 return result;
945 WB_END
946
947 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
948 return CompileBroker::get_compilation_activity_mode();
949 WB_END
950
951 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
952 ThreadToNativeFromVM ttn(thread);
953 CodeBlobStub stub((CodeBlob*) addr);
954 return codeBlob2objectArray(thread, env, &stub);
955 WB_END
956
957 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
958 return (jlong) Thread::current()->stack_size();
959 WB_END
960
961 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
962 JavaThread* t = JavaThread::current();
963 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
964 WB_END
965
966 int WhiteBox::array_bytes_to_length(size_t bytes) {
967 return Array<u1>::bytes_to_length(bytes);
968 }
969
970 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
971 if (size < 0) {
972 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
973 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
974 }
975
976 oop class_loader_oop = JNIHandles::resolve(class_loader);
977 ClassLoaderData* cld = class_loader_oop != NULL
978 ? java_lang_ClassLoader::loader_data(class_loader_oop)
979 : ClassLoaderData::the_null_class_loader_data();
980
981 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
982
983 return (jlong)(uintptr_t)metadata;
984 WB_END
985
986 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
987 oop class_loader_oop = JNIHandles::resolve(class_loader);
988 ClassLoaderData* cld = class_loader_oop != NULL
989 ? java_lang_ClassLoader::loader_data(class_loader_oop)
990 : ClassLoaderData::the_null_class_loader_data();
991
992 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
993 WB_END
994
995 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
996 if (inc < 0) {
997 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
998 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
999 }
1000
1001 jlong max_size_t = (jlong) ((size_t) -1);
1002 if (inc > max_size_t) {
1003 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1004 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1005 }
1006
1007 size_t new_cap_until_GC = 0;
1008 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1009 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1010 if (!success) {
1011 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1012 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1013 "due to contention with another thread");
1014 }
1015 return (jlong) new_cap_until_GC;
1016 WB_END
1017
1018 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1019 return (jlong) MetaspaceGC::capacity_until_GC();
1020 WB_END
1021
1022 //Some convenience methods to deal with objects from java
1023 int WhiteBox::offset_for_field(const char* field_name, oop object,
1024 Symbol* signature_symbol) {
1025 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1026 Thread* THREAD = Thread::current();
1027
1028 //Get the class of our object
1029 Klass* arg_klass = object->klass();
1030 //Turn it into an instance-klass
1031 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1032
1033 //Create symbols to look for in the class
1034 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1035 THREAD);
1036
1037 //To be filled in with an offset of the field we're looking for
1038 fieldDescriptor fd;
1039
1040 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1041 if (res == NULL) {
1042 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1043 name_symbol->as_C_string());
1044 fatal("Invalid layout of preloaded class");
1045 }
1046
1047 //fetch the field at the offset we've found
1048 int dest_offset = fd.offset();
1049
1050 return dest_offset;
1051 }
1052
1053
1054 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1055 int offset = offset_for_field(field_name, object,
1056 vmSymbols::string_signature());
1057 oop string = object->obj_field(offset);
1058 if (string == NULL) {
1059 return NULL;
1060 }
1061 const char* ret = java_lang_String::as_utf8_string(string);
1062 return ret;
1063 }
1064
1065 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1066 int offset =
1067 offset_for_field(field_name, object, vmSymbols::bool_signature());
1068 bool ret = (object->bool_field(offset) == JNI_TRUE);
1069 return ret;
1070 }
1071
1072 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1073 ResourceMark rm;
1074 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1075
1076 // one by one registration natives for exception catching
1077 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1078 CHECK_JNI_EXCEPTION(env);
1079 for (int i = 0, n = method_count; i < n; ++i) {
1080 // Skip dummy entries
1081 if (method_array[i].fnPtr == NULL) continue;
1082 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1083 jthrowable throwable_obj = env->ExceptionOccurred();
1084 if (throwable_obj != NULL) {
1085 env->ExceptionClear();
1086 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1087 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1088 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1089 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1090 method_array[i].name, method_array[i].signature);
1091 }
1092 } else {
1093 // Registration failed unexpectedly.
1094 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1095 method_array[i].name, method_array[i].signature);
1096 env->UnregisterNatives(wbclass);
1097 break;
1098 }
1099 }
1100 }
1101 }
1102
1103 #define CC (char*)
1104
1105 static JNINativeMethod methods[] = {
1106 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1107 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1108 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1109 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1110 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1111 {CC"parseCommandLine",
1112 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1113 (void*) &WB_ParseCommandLine
1114 },
1115 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1116 (void*)&WB_GetCompressedOopsMaxHeapSize},
1117 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1118 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1119 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1120 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1121 #if INCLUDE_ALL_GCS
1122 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1123 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1124 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1125 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1126 #endif // INCLUDE_ALL_GCS
1127 #if INCLUDE_NMT
1128 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1129 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1130 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1131 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1132 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1133 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1134 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1135 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1136 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1137 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1138 #endif // INCLUDE_NMT
1139 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1140 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1141 (void*)&WB_DeoptimizeMethod },
1142 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1143 (void*)&WB_IsMethodCompiled },
1144 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1145 (void*)&WB_IsMethodCompilable},
1146 {CC"isMethodQueuedForCompilation",
1147 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1148 {CC"makeMethodNotCompilable",
1149 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1150 {CC"testSetDontInlineMethod",
1151 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1152 {CC"getMethodCompilationLevel",
1153 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1154 {CC"getMethodEntryBci",
1155 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1156 {CC"getCompileQueueSize",
1157 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1158 {CC"testSetForceInlineMethod",
1159 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1160 {CC"enqueueMethodForCompilation",
1161 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1162 {CC"clearMethodState",
1163 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1164 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1165 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1166 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1167 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1168 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1169 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1170 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1171 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1172 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1173 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1174 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1175 (void*)&WB_SetStringVMFlag},
1176 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1177 (void*)&WB_GetBooleanVMFlag},
1178 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1179 (void*)&WB_GetIntxVMFlag},
1180 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1181 (void*)&WB_GetUintxVMFlag},
1182 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1183 (void*)&WB_GetUint64VMFlag},
1184 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1185 (void*)&WB_GetSizeTVMFlag},
1186 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1187 (void*)&WB_GetDoubleVMFlag},
1188 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1189 (void*)&WB_GetStringVMFlag},
1190 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1191 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1192 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1193 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1194 {CC"allocateMetaspace",
1195 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1196 {CC"freeMetaspace",
1197 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1198 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1199 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1200 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1201 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1202 (void*)&WB_GetNMethod },
1203 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
1204 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1205 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1206 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1207 {CC"getCompilationActivityMode",
1208 CC"()I", (void*)&WB_GetCompilationActivityMode},
1209 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1210 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1211 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1212 };
1213
1214 #undef CC
1215
1216 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1217 {
1218 if (WhiteBoxAPI) {
1219 // Make sure that wbclass is loaded by the null classloader
1220 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1221 Handle loader(ikh->class_loader());
1222 if (loader.is_null()) {
1223 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1224 WhiteBox::register_extended(env, wbclass, thread);
1225 WhiteBox::set_used();
1226 }
1227 }
1228 }
1229 JVM_END