1 /*
2 * Copyright (c) 2012, 2016, 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 "classfile/classLoaderData.hpp"
30 #include "classfile/modules.hpp"
31 #include "classfile/stringTable.hpp"
32 #include "code/codeCache.hpp"
33 #include "compiler/methodMatcher.hpp"
34 #include "compiler/directivesParser.hpp"
35 #include "jvmtifiles/jvmtiEnv.hpp"
36 #include "memory/metadataFactory.hpp"
37 #include "memory/metaspaceShared.hpp"
38 #include "memory/iterator.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "memory/universe.hpp"
41 #include "oops/constantPool.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "prims/wbtestmethods/parserTests.hpp"
44 #include "prims/whitebox.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/compilationPolicy.hpp"
47 #include "runtime/deoptimization.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/os.hpp"
51 #include "runtime/sweeper.hpp"
52 #include "runtime/thread.hpp"
53 #include "runtime/vm_version.hpp"
54 #include "utilities/array.hpp"
55 #include "utilities/debug.hpp"
56 #include "utilities/exceptions.hpp"
57 #include "utilities/macros.hpp"
58 #if INCLUDE_ALL_GCS
59 #include "gc/g1/concurrentMarkThread.hpp"
60 #include "gc/g1/g1CollectedHeap.inline.hpp"
61 #include "gc/g1/g1ConcurrentMark.hpp"
62 #include "gc/g1/heapRegionRemSet.hpp"
63 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
64 #include "gc/parallel/adjoiningGenerations.hpp"
65 #endif // INCLUDE_ALL_GCS
66 #if INCLUDE_NMT
67 #include "services/mallocSiteTable.hpp"
68 #include "services/memTracker.hpp"
69 #include "utilities/nativeCallStack.hpp"
70 #endif // INCLUDE_NMT
71
72
73 #define SIZE_T_MAX_VALUE ((size_t) -1)
74
75 bool WhiteBox::_used = false;
76 volatile bool WhiteBox::compilation_locked = false;
77
78 class VM_WhiteBoxOperation : public VM_Operation {
79 public:
80 VM_WhiteBoxOperation() { }
81 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
82 bool allow_nested_vm_operations() const { return true; }
83 };
84
85
86 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
87 return (jlong)(void*)JNIHandles::resolve(obj);
88 WB_END
89
90 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
91 return heapOopSize;
92 WB_END
93
94 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
95 return os::vm_page_size();
96 WB_END
97
98 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
99 return os::vm_allocation_granularity();
100 WB_END
101
102 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
103 return os::large_page_size();
104 WB_END
105
106 class WBIsKlassAliveClosure : public KlassClosure {
107 Symbol* _name;
108 bool _found;
109 public:
110 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
111
112 void do_klass(Klass* k) {
113 if (_found) return;
114 Symbol* ksym = k->name();
115 if (ksym->fast_compare(_name) == 0) {
116 _found = true;
117 }
118 }
119
120 bool found() const {
121 return _found;
122 }
123 };
124
125 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
126 Handle h_name = JNIHandles::resolve(name);
127 if (h_name.is_null()) return false;
128 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
129 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
130
131 WBIsKlassAliveClosure closure(sym);
132 ClassLoaderDataGraph::classes_do(&closure);
133
134 return closure.found();
135 WB_END
136
137 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
138 #if INCLUDE_JVMTI
139 ResourceMark rm;
140 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
141 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
142 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
143 assert(err == JVMTI_ERROR_NONE, "must not fail");
144 #endif
145 }
146 WB_END
147
148 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
149 #if INCLUDE_JVMTI
150 ResourceMark rm;
151 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
152 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
153 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
154 assert(err == JVMTI_ERROR_NONE, "must not fail");
155 #endif
156 }
157 WB_END
158
159
160 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
161 return (jlong)Arguments::max_heap_for_compressed_oops();
162 }
163 WB_END
164
165 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
166 CollectorPolicy * p = Universe::heap()->collector_policy();
167 tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
168 SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
169 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
170 p->space_alignment(), p->heap_alignment());
171 }
172 WB_END
173
174 #ifndef PRODUCT
175 // Forward declaration
176 void TestReservedSpace_test();
177 void TestReserveMemorySpecial_test();
178 void TestVirtualSpace_test();
179 void TestMetaspaceAux_test();
180 #endif
181
182 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
183 #ifndef PRODUCT
184 TestReservedSpace_test();
185 TestReserveMemorySpecial_test();
186 TestVirtualSpace_test();
187 TestMetaspaceAux_test();
188 #endif
189 WB_END
190
191 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
192 size_t granularity = os::vm_allocation_granularity();
193 ReservedHeapSpace rhs(100 * granularity, granularity, false);
194 VirtualSpace vs;
195 vs.initialize(rhs, 50 * granularity);
196
197 // Check if constraints are complied
198 if (!( UseCompressedOops && rhs.base() != NULL &&
199 Universe::narrow_oop_base() != NULL &&
200 Universe::narrow_oop_use_implicit_null_checks() )) {
201 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
202 "\tUseCompressedOops is %d\n"
203 "\trhs.base() is " PTR_FORMAT "\n"
204 "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
205 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
206 UseCompressedOops,
207 p2i(rhs.base()),
208 p2i(Universe::narrow_oop_base()),
209 Universe::narrow_oop_use_implicit_null_checks());
210 return;
211 }
212 tty->print_cr("Reading from no access area... ");
213 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
214 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
215 WB_END
216
217 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
218 size_t magnitude, size_t iterations) {
219 size_t granularity = os::vm_allocation_granularity();
220 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
221 VirtualSpace vs;
222 if (!vs.initialize(rhs, 0)) {
223 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
224 return 3;
225 }
226
227 long seed = os::random();
228 tty->print_cr("Random seed is %ld", seed);
229 os::init_random(seed);
230
231 for (size_t i = 0; i < iterations; i++) {
232
233 // Whether we will shrink or grow
234 bool shrink = os::random() % 2L == 0;
235
236 // Get random delta to resize virtual space
237 size_t delta = (size_t)os::random() % magnitude;
238
239 // If we are about to shrink virtual space below zero, then expand instead
240 if (shrink && vs.committed_size() < delta) {
241 shrink = false;
242 }
243
244 // Resizing by delta
245 if (shrink) {
246 vs.shrink_by(delta);
247 } else {
248 // If expanding fails expand_by will silently return false
249 vs.expand_by(delta, true);
250 }
251 }
252 return 0;
253 }
254
255 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
256 jlong reserved_space_size, jlong magnitude, jlong iterations))
257 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
258 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
259 iterations);
260 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
261 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
262 return 1;
263 }
264
265 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
266 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
267 if (sizeof(size_t) < sizeof(jlong)) {
268 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
269 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
270 || iterations > size_t_max_value) {
271 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
272 return 2;
273 }
274 }
275
276 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
277 (size_t) magnitude, (size_t) iterations);
278 WB_END
279
280 WB_ENTRY(jboolean, WB_SupportsSerialGC(JNIEnv* env, jobject o, jobject obj))
281 return true;
282 WB_END
283
284 WB_ENTRY(jboolean, WB_SupportsParallelGC(JNIEnv* env, jobject o, jobject obj))
285 #if INCLUDE_ALL_GCS
286 return true;
287 #else
288 return false;
289 #endif // INCLUDE_ALL_GCS
290 WB_END
291
292 WB_ENTRY(jboolean, WB_SupportsConcMarkSweepGC(JNIEnv* env, jobject o, jobject obj))
293 #if INCLUDE_ALL_GCS
294 return true;
295 #else
296 return false;
297 #endif // INCLUDE_ALL_GCS
298 WB_END
299
300 WB_ENTRY(jboolean, WB_SupportsG1GC(JNIEnv* env, jobject o, jobject obj))
301 #if INCLUDE_ALL_GCS
302 return true;
303 #else
304 return false;
305 #endif // INCLUDE_ALL_GCS
306 WB_END
307
308 WB_ENTRY(jboolean, WB_GcSelectedByErgo0(JNIEnv* env, jobject o, jobject obj))
309 if (UseSerialGC) {
310 return FLAG_IS_ERGO(UseSerialGC);
311 }
312 if (UseParallelGC) {
313 return FLAG_IS_ERGO(UseParallelGC);
314 }
315 if (UseParallelOldGC) {
316 return FLAG_IS_ERGO(UseParallelOldGC);
317 }
318 if (UseConcMarkSweepGC) {
319 return FLAG_IS_ERGO(UseConcMarkSweepGC);
320 }
321 if (UseG1GC) {
322 return FLAG_IS_ERGO(UseG1GC);
323 }
324 return false; // should not reach here
325 WB_END
326
327 WB_ENTRY(jstring, WB_GetGC(JNIEnv* env, jobject o))
328 const char* gc = "unknown";
329 if (UseSerialGC) {
330 gc = "Serial";
331 } else if (UseParallelGC | UseParallelOldGC) {
332 gc = "Parallel";
333 } else if (UseConcMarkSweepGC) {
334 gc = "ConcMarkSweep";
335 } else if (UseG1GC) {
336 gc = "G1";
337 }
338 jstring gc_string = env->NewStringUTF(gc);
339 return gc_string;
340 WB_END
341
342 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
343 oop p = JNIHandles::resolve(obj);
344 #if INCLUDE_ALL_GCS
345 if (UseG1GC) {
346 G1CollectedHeap* g1 = G1CollectedHeap::heap();
347 const HeapRegion* hr = g1->heap_region_containing(p);
348 if (hr == NULL) {
349 return false;
350 }
351 return !(hr->is_young());
352 } else if (UseParallelGC) {
353 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
354 return !psh->is_in_young(p);
355 }
356 #endif // INCLUDE_ALL_GCS
357 GenCollectedHeap* gch = GenCollectedHeap::heap();
358 return !gch->is_in_young(p);
359 WB_END
360
361 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
362 oop p = JNIHandles::resolve(obj);
363 return p->size() * HeapWordSize;
364 WB_END
365
366 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
367 size_t alignment = Universe::heap()->collector_policy()->space_alignment();
368 return (jlong)alignment;
369 WB_END
370
371 #if INCLUDE_ALL_GCS
372 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
373 G1CollectedHeap* g1 = G1CollectedHeap::heap();
374 oop result = JNIHandles::resolve(obj);
375 const HeapRegion* hr = g1->heap_region_containing(result);
376 return hr->is_humongous();
377 WB_END
378
379 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
380 G1CollectedHeap* g1 = G1CollectedHeap::heap();
381 const HeapRegion* hr = g1->heap_region_containing((void*) addr);
382 return hr->is_humongous();
383 WB_END
384
385 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
386 G1CollectedHeap* g1 = G1CollectedHeap::heap();
387 const HeapRegion* hr = g1->heap_region_containing((void*) addr);
388 return hr->is_free();
389 WB_END
390
391 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
392 G1CollectedHeap* g1 = G1CollectedHeap::heap();
393 size_t nr = g1->max_regions();
394 return (jlong)nr;
395 WB_END
396
397 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
398 G1CollectedHeap* g1 = G1CollectedHeap::heap();
399 size_t nr = g1->num_free_regions();
400 return (jlong)nr;
401 WB_END
402
403 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
404 G1CollectedHeap* g1h = G1CollectedHeap::heap();
405 return g1h->concurrent_mark()->cmThread()->during_cycle();
406 WB_END
407
408 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
409 G1CollectedHeap* g1h = G1CollectedHeap::heap();
410 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
411 g1h->collect(GCCause::_wb_conc_mark);
412 return true;
413 }
414 return false;
415 WB_END
416
417 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
418 return (jint)HeapRegion::GrainBytes;
419 WB_END
420
421 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
422 ParallelScavengeHeap* ps = ParallelScavengeHeap::heap();
423 size_t alignment = ps->gens()->virtual_spaces()->alignment();
424 return (jlong)alignment;
425 WB_END
426
427 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
428 size_t alignment = ParallelScavengeHeap::heap()->generation_alignment();
429 return (jlong)alignment;
430 WB_END
431
432 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
433 ResourceMark rm(THREAD);
434 G1CollectedHeap* g1h = G1CollectedHeap::heap();
435 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
436 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
437 return JNIHandles::make_local(env, h());
438 WB_END
439 #endif // INCLUDE_ALL_GCS
440
441 #if INCLUDE_NMT
442 // Alloc memory using the test memory type so that we can use that to see if
443 // NMT picks it up correctly
444 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
445 jlong addr = 0;
446 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
447 return addr;
448 WB_END
449
450 // Alloc memory with pseudo call stack. The test can create psudo malloc
451 // allocation site to stress the malloc tracking.
452 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
453 address pc = (address)(size_t)pseudo_stack;
454 NativeCallStack stack(&pc, 1);
455 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
456 WB_END
457
458 // Free the memory allocated by NMTAllocTest
459 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
460 os::free((void*)(uintptr_t)mem);
461 WB_END
462
463 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
464 jlong addr = 0;
465
466 addr = (jlong)(uintptr_t)os::reserve_memory(size);
467 MemTracker::record_virtual_memory_type((address)addr, mtTest);
468
469 return addr;
470 WB_END
471
472 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
473 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
474 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
475 WB_END
476
477 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
478 os::uncommit_memory((char *)(uintptr_t)addr, size);
479 WB_END
480
481 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
482 os::release_memory((char *)(uintptr_t)addr, size);
483 WB_END
484
485 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
486 // Test that we can downgrade NMT levels but not upgrade them.
487 if (MemTracker::tracking_level() == NMT_off) {
488 MemTracker::transition_to(NMT_off);
489 return MemTracker::tracking_level() == NMT_off;
490 } else {
491 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
492 MemTracker::transition_to(NMT_summary);
493 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
494
495 // Can't go to detail once NMT is set to summary.
496 MemTracker::transition_to(NMT_detail);
497 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
498
499 // Shutdown sets tracking level to minimal.
500 MemTracker::shutdown();
501 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
502
503 // Once the tracking level is minimal, we cannot increase to summary.
504 // The code ignores this request instead of asserting because if the malloc site
505 // table overflows in another thread, it tries to change the code to summary.
506 MemTracker::transition_to(NMT_summary);
507 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
508
509 // Really can never go up to detail, verify that the code would never do this.
510 MemTracker::transition_to(NMT_detail);
511 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
512 return MemTracker::tracking_level() == NMT_minimal;
513 }
514 WB_END
515
516 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
517 int hash_size = MallocSiteTable::hash_buckets();
518 assert(hash_size > 0, "NMT hash_size should be > 0");
519 return (jint)hash_size;
520 WB_END
521 #endif // INCLUDE_NMT
522
523 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
524 assert(method != NULL, "method should not be null");
525 ThreadToNativeFromVM ttn(thread);
526 return env->FromReflectedMethod(method);
527 }
528
529 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
530 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
531 private:
532 int _result;
533 const bool _make_not_entrant;
534 public:
535 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
536 _result(0), _make_not_entrant(make_not_entrant) { }
537 int result() const { return _result; }
538
539 void doit() {
540 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
541 if (t->has_last_Java_frame()) {
542 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
543 frame* f = fst.current();
544 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
545 RegisterMap* reg_map = fst.register_map();
546 Deoptimization::deoptimize(t, *f, reg_map);
547 if (_make_not_entrant) {
548 nmethod* nm = CodeCache::find_nmethod(f->pc());
549 assert(nm != NULL, "sanity check");
550 nm->make_not_entrant();
551 }
552 ++_result;
553 }
554 }
555 }
556 }
557 }
558 };
559
560 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
561 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
562 VMThread::execute(&op);
563 return op.result();
564 WB_END
565
566 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
567 MutexLockerEx mu(Compile_lock);
568 CodeCache::mark_all_nmethods_for_deoptimization();
569 VM_Deoptimize op;
570 VMThread::execute(&op);
571 WB_END
572
573 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
574 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
575 int result = 0;
576 CHECK_JNI_EXCEPTION_(env, result);
577 MutexLockerEx mu(Compile_lock);
578 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
579 if (is_osr) {
580 result += mh->mark_osr_nmethods();
581 } else if (mh->code() != NULL) {
582 mh->code()->mark_for_deoptimization();
583 ++result;
584 }
585 result += CodeCache::mark_for_deoptimization(mh());
586 if (result > 0) {
587 VM_Deoptimize op;
588 VMThread::execute(&op);
589 }
590 return result;
591 WB_END
592
593 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
594 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
595 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
596 MutexLockerEx mu(Compile_lock);
597 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
598 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
599 if (code == NULL) {
600 return JNI_FALSE;
601 }
602 return (code->is_alive() && !code->is_marked_for_deoptimization());
603 WB_END
604
605 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
606 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
607 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
608 MutexLockerEx mu(Compile_lock);
609 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
610 if (is_osr) {
611 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
612 } else {
613 return CompilationPolicy::can_be_compiled(mh, comp_level);
614 }
615 WB_END
616
617 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
618 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
619 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
620 MutexLockerEx mu(Compile_lock);
621 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
622 return mh->queued_for_compilation();
623 WB_END
624
625 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
626 if (compLevel < CompLevel_none || compLevel > CompLevel_highest_tier) {
627 return false; // Intrinsic is not available on a non-existent compilation level.
628 }
629 jmethodID method_id, compilation_context_id;
630 method_id = reflected_method_to_jmid(thread, env, method);
631 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
632 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
633
634 DirectiveSet* directive;
635 AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
636 if (compilation_context != NULL) {
637 compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
638 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
639 methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
640 directive = DirectivesStack::getMatchingDirective(cch, comp);
641 } else {
642 // Calling with NULL matches default directive
643 directive = DirectivesStack::getDefaultDirective(comp);
644 }
645 bool result = CompileBroker::compiler(compLevel)->is_intrinsic_available(mh, directive);
646 DirectivesStack::release(directive);
647 return result;
648 WB_END
649
650 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
651 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
652 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
653 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
654 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
655 return (code != NULL ? code->comp_level() : CompLevel_none);
656 WB_END
657
658 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
659 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
660 CHECK_JNI_EXCEPTION(env);
661 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
662 if (is_osr) {
663 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
664 } else {
665 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
666 }
667 WB_END
668
669 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
670 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
671 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
672 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
673 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
674 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
675 WB_END
676
677 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
678 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
679 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
680 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
681 bool result = mh->dont_inline();
682 mh->set_dont_inline(value == JNI_TRUE);
683 return result;
684 WB_END
685
686 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
687 if (comp_level == CompLevel_any) {
688 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
689 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
690 } else {
691 return CompileBroker::queue_size(comp_level);
692 }
693 WB_END
694
695 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
696 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
697 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
698 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
699 bool result = mh->force_inline();
700 mh->set_force_inline(value == JNI_TRUE);
701 return result;
702 WB_END
703
704 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
705 // Screen for unavailable/bad comp level
706 if (CompileBroker::compiler(comp_level) == NULL) {
707 return false;
708 }
709 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
710 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
711 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
712 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
713 MutexLockerEx mu(Compile_lock);
714 return (mh->queued_for_compilation() || nm != NULL);
715 WB_END
716
717 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
718 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
719 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
720
721 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
722 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
723 bool result = directive->PrintAssemblyOption;
724 DirectivesStack::release(directive);
725
726 return result;
727 WB_END
728
729 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
730 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
731 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
732
733 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
734
735 ResourceMark rm;
736 const char* error_msg = NULL;
737 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
738 InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
739
740 if (m == NULL) {
741 assert(error_msg != NULL, "Always have an error message");
742 tty->print_cr("Got error: %s", error_msg);
743 return -1; // Pattern failed
744 }
745
746 // Pattern works - now check if it matches
747 int result;
748 if (m->match(mh, InlineMatcher::force_inline)) {
749 result = 2; // Force inline match
750 } else if (m->match(mh, InlineMatcher::dont_inline)) {
751 result = 1; // Dont inline match
752 } else {
753 result = 0; // No match
754 }
755 delete m;
756 return result;
757 WB_END
758
759 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
760 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
761 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
762
763 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
764
765 ResourceMark rm;
766 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
767
768 const char* error_msg = NULL;
769
770 BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
771 if (m == NULL) {
772 assert(error_msg != NULL, "Must have error_msg");
773 tty->print_cr("Got error: %s", error_msg);
774 return -1;
775 }
776
777 // Pattern works - now check if it matches
778 int result = m->matches(mh);
779 delete m;
780 assert(result == 0 || result == 1, "Result out of range");
781 return result;
782 WB_END
783
784 static AlwaysFalseClosure always_false;
785
786 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
787 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
788 CHECK_JNI_EXCEPTION(env);
789 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
790 MutexLockerEx mu(Compile_lock);
791 MethodData* mdo = mh->method_data();
792 MethodCounters* mcs = mh->method_counters();
793
794 if (mdo != NULL) {
795 mdo->init();
796 ResourceMark rm;
797 int arg_count = mdo->method()->size_of_parameters();
798 for (int i = 0; i < arg_count; i++) {
799 mdo->set_arg_modified(i, 0);
800 }
801 MutexLockerEx mu(mdo->extra_data_lock());
802 mdo->clean_method_data(&always_false);
803 }
804
805 mh->clear_not_c1_compilable();
806 mh->clear_not_c2_compilable();
807 mh->clear_not_c2_osr_compilable();
808 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
809 if (mcs != NULL) {
810 mcs->backedge_counter()->init();
811 mcs->invocation_counter()->init();
812 mcs->set_interpreter_invocation_count(0);
813 mcs->set_interpreter_throwout_count(0);
814
815 #ifdef TIERED
816 mcs->set_rate(0.0F);
817 mh->set_prev_event_count(0);
818 mh->set_prev_time(0);
819 #endif
820 }
821 WB_END
822
823 template <typename T>
824 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
825 if (name == NULL) {
826 return false;
827 }
828 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
829 const char* flag_name = env->GetStringUTFChars(name, NULL);
830 Flag::Error result = (*TAt)(flag_name, value, true, true);
831 env->ReleaseStringUTFChars(name, flag_name);
832 return (result == Flag::SUCCESS);
833 }
834
835 template <typename T>
836 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
837 if (name == NULL) {
838 return false;
839 }
840 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
841 const char* flag_name = env->GetStringUTFChars(name, NULL);
842 Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
843 env->ReleaseStringUTFChars(name, flag_name);
844 return (result == Flag::SUCCESS);
845 }
846
847 template <typename T>
848 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
849 ResourceMark rm(thread);
850 jclass clazz = env->FindClass(name->as_C_string());
851 CHECK_JNI_EXCEPTION_(env, NULL);
852 jmethodID methodID = env->GetStaticMethodID(clazz,
853 vmSymbols::valueOf_name()->as_C_string(),
854 sig->as_C_string());
855 CHECK_JNI_EXCEPTION_(env, NULL);
856 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
857 CHECK_JNI_EXCEPTION_(env, NULL);
858 return result;
859 }
860
861 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
862 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
863 }
864 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
865 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
866 }
867 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
868 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
869 }
870 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
871 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
872 }*/
873 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
874 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
875 }
876
877 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
878 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
879 const char* flag_name = env->GetStringUTFChars(name, NULL);
880 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
881 env->ReleaseStringUTFChars(name, flag_name);
882 return result;
883 }
884
885 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
886 Flag* flag = getVMFlag(thread, env, name);
887 return (flag != NULL) && flag->is_constant_in_binary();
888 WB_END
889
890 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
891 Flag* flag = getVMFlag(thread, env, name);
892 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
893 WB_END
894
895 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
896 bool result;
897 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
898 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
899 return booleanBox(thread, env, result);
900 }
901 return NULL;
902 WB_END
903
904 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
905 int result;
906 if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
907 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
908 return longBox(thread, env, result);
909 }
910 return NULL;
911 WB_END
912
913 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
914 uint result;
915 if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
916 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
917 return longBox(thread, env, result);
918 }
919 return NULL;
920 WB_END
921
922 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
923 intx result;
924 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
925 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
926 return longBox(thread, env, result);
927 }
928 return NULL;
929 WB_END
930
931 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
932 uintx result;
933 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
934 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
935 return longBox(thread, env, result);
936 }
937 return NULL;
938 WB_END
939
940 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
941 uint64_t result;
942 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
943 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
944 return longBox(thread, env, result);
945 }
946 return NULL;
947 WB_END
948
949 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
950 uintx result;
951 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
952 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
953 return longBox(thread, env, result);
954 }
955 return NULL;
956 WB_END
957
958 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
959 double result;
960 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
961 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
962 return doubleBox(thread, env, result);
963 }
964 return NULL;
965 WB_END
966
967 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
968 ccstr ccstrResult;
969 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
970 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
971 jstring result = env->NewStringUTF(ccstrResult);
972 CHECK_JNI_EXCEPTION_(env, NULL);
973 return result;
974 }
975 return NULL;
976 WB_END
977
978 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
979 bool result = value == JNI_TRUE ? true : false;
980 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
981 WB_END
982
983 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
984 int result = value;
985 SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
986 WB_END
987
988 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
989 uint result = value;
990 SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
991 WB_END
992
993 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
994 intx result = value;
995 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
996 WB_END
997
998 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
999 uintx result = value;
1000 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
1001 WB_END
1002
1003 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1004 uint64_t result = value;
1005 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
1006 WB_END
1007
1008 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
1009 size_t result = value;
1010 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
1011 WB_END
1012
1013 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
1014 double result = value;
1015 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
1016 WB_END
1017
1018 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
1019 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1020 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
1021 ccstr ccstrResult = ccstrValue;
1022 bool needFree;
1023 {
1024 ThreadInVMfromNative ttvfn(thread); // back to VM
1025 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
1026 }
1027 if (value != NULL) {
1028 env->ReleaseStringUTFChars(value, ccstrValue);
1029 }
1030 if (needFree) {
1031 FREE_C_HEAP_ARRAY(char, ccstrResult);
1032 }
1033 WB_END
1034
1035 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
1036 WhiteBox::compilation_locked = true;
1037 WB_END
1038
1039 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
1040 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
1041 WhiteBox::compilation_locked = false;
1042 mo.notify_all();
1043 WB_END
1044
1045 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
1046 // Force a code cache sweep and block until it finished
1047 NMethodSweeper::force_sweep();
1048 WB_END
1049
1050 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
1051 ResourceMark rm(THREAD);
1052 int len;
1053 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1054 return (StringTable::lookup(name, len) != NULL);
1055 WB_END
1056
1057 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1058 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
1059 Universe::heap()->collect(GCCause::_wb_full_gc);
1060 #if INCLUDE_ALL_GCS
1061 if (UseG1GC) {
1062 // Needs to be cleared explicitly for G1
1063 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
1064 }
1065 #endif // INCLUDE_ALL_GCS
1066 WB_END
1067
1068 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1069 Universe::heap()->collect(GCCause::_wb_young_gc);
1070 WB_END
1071
1072 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1073 // static+volatile in order to force the read to happen
1074 // (not be eliminated by the compiler)
1075 static char c;
1076 static volatile char* p;
1077
1078 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1079 if (p == NULL) {
1080 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1081 }
1082
1083 c = *p;
1084 WB_END
1085
1086 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1087 const char* features = VM_Version::features_string();
1088 ThreadToNativeFromVM ttn(thread);
1089 jstring features_string = env->NewStringUTF(features);
1090
1091 CHECK_JNI_EXCEPTION_(env, NULL);
1092
1093 return features_string;
1094 WB_END
1095
1096 int WhiteBox::get_blob_type(const CodeBlob* code) {
1097 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1098 return CodeCache::get_code_heap(code)->code_blob_type();
1099 }
1100
1101 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1102 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1103 return CodeCache::get_code_heap(blob_type);
1104 }
1105
1106 struct CodeBlobStub {
1107 CodeBlobStub(const CodeBlob* blob) :
1108 name(os::strdup(blob->name())),
1109 size(blob->size()),
1110 blob_type(WhiteBox::get_blob_type(blob)),
1111 address((jlong) blob) { }
1112 ~CodeBlobStub() { os::free((void*) name); }
1113 const char* const name;
1114 const jint size;
1115 const jint blob_type;
1116 const jlong address;
1117 };
1118
1119 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1120 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1121 CHECK_JNI_EXCEPTION_(env, NULL);
1122 jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1123
1124 jstring name = env->NewStringUTF(cb->name);
1125 CHECK_JNI_EXCEPTION_(env, NULL);
1126 env->SetObjectArrayElement(result, 0, name);
1127
1128 jobject obj = integerBox(thread, env, cb->size);
1129 CHECK_JNI_EXCEPTION_(env, NULL);
1130 env->SetObjectArrayElement(result, 1, obj);
1131
1132 obj = integerBox(thread, env, cb->blob_type);
1133 CHECK_JNI_EXCEPTION_(env, NULL);
1134 env->SetObjectArrayElement(result, 2, obj);
1135
1136 obj = longBox(thread, env, cb->address);
1137 CHECK_JNI_EXCEPTION_(env, NULL);
1138 env->SetObjectArrayElement(result, 3, obj);
1139
1140 return result;
1141 }
1142
1143 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1144 ResourceMark rm(THREAD);
1145 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1146 CHECK_JNI_EXCEPTION_(env, NULL);
1147 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1148 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1149 jobjectArray result = NULL;
1150 if (code == NULL) {
1151 return result;
1152 }
1153 int insts_size = code->insts_size();
1154
1155 ThreadToNativeFromVM ttn(thread);
1156 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1157 CHECK_JNI_EXCEPTION_(env, NULL);
1158 result = env->NewObjectArray(5, clazz, NULL);
1159 if (result == NULL) {
1160 return result;
1161 }
1162
1163 CodeBlobStub stub(code);
1164 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1165 CHECK_JNI_EXCEPTION_(env, NULL);
1166 env->SetObjectArrayElement(result, 0, codeBlob);
1167
1168 jobject level = integerBox(thread, env, code->comp_level());
1169 CHECK_JNI_EXCEPTION_(env, NULL);
1170 env->SetObjectArrayElement(result, 1, level);
1171
1172 jbyteArray insts = env->NewByteArray(insts_size);
1173 CHECK_JNI_EXCEPTION_(env, NULL);
1174 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1175 env->SetObjectArrayElement(result, 2, insts);
1176
1177 jobject id = integerBox(thread, env, code->compile_id());
1178 CHECK_JNI_EXCEPTION_(env, NULL);
1179 env->SetObjectArrayElement(result, 3, id);
1180
1181 jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1182 CHECK_JNI_EXCEPTION_(env, NULL);
1183 env->SetObjectArrayElement(result, 4, entry_point);
1184
1185 return result;
1186 WB_END
1187
1188 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1189 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1190 BufferBlob* blob;
1191 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1192 if (full_size < size) {
1193 full_size += round_to(size - full_size, oopSize);
1194 }
1195 {
1196 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1197 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1198 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1199 }
1200 // Track memory usage statistic after releasing CodeCache_lock
1201 MemoryService::track_code_cache_memory_usage();
1202 return blob;
1203 }
1204
1205 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1206 if (size < 0) {
1207 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1208 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1209 }
1210 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1211 WB_END
1212
1213 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1214 if (addr == 0) {
1215 return;
1216 }
1217 BufferBlob::free((BufferBlob*) addr);
1218 WB_END
1219
1220 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1221 ResourceMark rm;
1222 GrowableArray<CodeBlobStub*> blobs;
1223 {
1224 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1225 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1226 if (heap == NULL) {
1227 return NULL;
1228 }
1229 for (CodeBlob* cb = (CodeBlob*) heap->first();
1230 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1231 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1232 new (stub) CodeBlobStub(cb);
1233 blobs.append(stub);
1234 }
1235 }
1236 if (blobs.length() == 0) {
1237 return NULL;
1238 }
1239 ThreadToNativeFromVM ttn(thread);
1240 jobjectArray result = NULL;
1241 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1242 CHECK_JNI_EXCEPTION_(env, NULL);
1243 result = env->NewObjectArray(blobs.length(), clazz, NULL);
1244 if (result == NULL) {
1245 return result;
1246 }
1247 int i = 0;
1248 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1249 it != blobs.end(); ++it) {
1250 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1251 CHECK_JNI_EXCEPTION_(env, NULL);
1252 env->SetObjectArrayElement(result, i, obj);
1253 ++i;
1254 }
1255 return result;
1256 WB_END
1257
1258 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1259 return CompileBroker::get_compilation_activity_mode();
1260 WB_END
1261
1262 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1263 if (addr == 0) {
1264 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1265 "WB_GetCodeBlob: addr is null");
1266 }
1267 ThreadToNativeFromVM ttn(thread);
1268 CodeBlobStub stub((CodeBlob*) addr);
1269 return codeBlob2objectArray(thread, env, &stub);
1270 WB_END
1271
1272 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1273 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1274 CHECK_JNI_EXCEPTION_(env, 0);
1275 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1276 return (jlong) mh->method_data();
1277 WB_END
1278
1279 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1280 return (jlong) Thread::current()->stack_size();
1281 WB_END
1282
1283 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1284 JavaThread* t = JavaThread::current();
1285 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1286 WB_END
1287
1288
1289 int WhiteBox::array_bytes_to_length(size_t bytes) {
1290 return Array<u1>::bytes_to_length(bytes);
1291 }
1292
1293 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1294 if (size < 0) {
1295 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1296 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1297 }
1298
1299 oop class_loader_oop = JNIHandles::resolve(class_loader);
1300 ClassLoaderData* cld = class_loader_oop != NULL
1301 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1302 : ClassLoaderData::the_null_class_loader_data();
1303
1304 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1305
1306 return (jlong)(uintptr_t)metadata;
1307 WB_END
1308
1309 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1310 oop class_loader_oop = JNIHandles::resolve(class_loader);
1311 ClassLoaderData* cld = class_loader_oop != NULL
1312 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1313 : ClassLoaderData::the_null_class_loader_data();
1314
1315 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1316 WB_END
1317
1318 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jstring version, jstring location,
1319 jobjectArray packages))
1320 Modules::define_module(module, version, location, packages, CHECK);
1321 WB_END
1322
1323 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1324 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1325 WB_END
1326
1327 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1328 Modules::add_module_exports_to_all_unnamed(module, package, CHECK);
1329 WB_END
1330
1331 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1332 Modules::add_module_exports(module, package, NULL, CHECK);
1333 WB_END
1334
1335 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1336 Modules::add_reads_module(from_module, source_module, CHECK);
1337 WB_END
1338
1339 WB_ENTRY(jboolean, WB_CanReadModule(JNIEnv* env, jobject o, jobject asking_module, jobject source_module))
1340 return Modules::can_read_module(asking_module, source_module, THREAD);
1341 WB_END
1342
1343 WB_ENTRY(jboolean, WB_IsExportedToModule(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1344 return Modules::is_exported_to_module(from_module, package, to_module, THREAD);
1345 WB_END
1346
1347 WB_ENTRY(void, WB_AddModulePackage(JNIEnv* env, jobject o, jclass module, jstring package))
1348 Modules::add_module_package(module, package, CHECK);
1349 WB_END
1350
1351 WB_ENTRY(jobject, WB_GetModuleByPackageName(JNIEnv* env, jobject o, jobject loader, jstring package))
1352 return Modules::get_module_by_package_name(loader, package, THREAD);
1353 WB_END
1354
1355 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1356 if (inc < 0) {
1357 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1358 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1359 }
1360
1361 jlong max_size_t = (jlong) ((size_t) -1);
1362 if (inc > max_size_t) {
1363 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1364 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1365 }
1366
1367 size_t new_cap_until_GC = 0;
1368 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1369 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1370 if (!success) {
1371 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1372 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1373 "due to contention with another thread");
1374 }
1375 return (jlong) new_cap_until_GC;
1376 WB_END
1377
1378 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1379 return (jlong) MetaspaceGC::capacity_until_GC();
1380 WB_END
1381
1382
1383 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1384 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1385 Monitor::_safepoint_check_always :
1386 Monitor::_safepoint_check_never;
1387 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1388 attemptedNoSafepointValue == JNI_TRUE);
1389 WB_END
1390
1391 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1392 oop obj_oop = JNIHandles::resolve(obj);
1393 return (jboolean) obj_oop->mark()->has_monitor();
1394 WB_END
1395
1396 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1397 VM_ForceSafepoint force_safepoint_op;
1398 VMThread::execute(&force_safepoint_op);
1399 WB_END
1400
1401 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1402 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1403 return (jlong) ikh->constants();
1404 WB_END
1405
1406 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1407 return ConstantPool::CPCACHE_INDEX_TAG;
1408 WB_END
1409
1410 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1411 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1412 ConstantPool* cp = ikh->constants();
1413 if (cp->cache() == NULL) {
1414 return -1;
1415 }
1416 return cp->cache()->length();
1417 WB_END
1418
1419 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1420 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1421 ConstantPool* cp = ikh->constants();
1422 if (cp->cache() == NULL) {
1423 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1424 }
1425 jint cpci = index;
1426 jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1427 if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1428 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1429 }
1430 jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1431 return cpi;
1432 WB_END
1433
1434 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1435 return ConstantPool::encode_invokedynamic_index(index);
1436 WB_END
1437
1438 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb))
1439 VM_ClearICs clear_ics;
1440 VMThread::execute(&clear_ics);
1441 WB_END
1442
1443 template <typename T>
1444 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1445 assert(value != NULL, "sanity");
1446 if (method == NULL || name == NULL) {
1447 return false;
1448 }
1449 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1450 CHECK_JNI_EXCEPTION_(env, false);
1451 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1452 // can't be in VM when we call JNI
1453 ThreadToNativeFromVM ttnfv(thread);
1454 const char* flag_name = env->GetStringUTFChars(name, NULL);
1455 bool result = CompilerOracle::has_option_value(mh, flag_name, *value);
1456 env->ReleaseStringUTFChars(name, flag_name);
1457 return result;
1458 }
1459
1460 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1461 bool result;
1462 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1463 // can't be in VM when we call JNI
1464 ThreadToNativeFromVM ttnfv(thread);
1465 return booleanBox(thread, env, result);
1466 }
1467 return NULL;
1468 WB_END
1469
1470 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1471 intx result;
1472 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1473 // can't be in VM when we call JNI
1474 ThreadToNativeFromVM ttnfv(thread);
1475 return longBox(thread, env, result);
1476 }
1477 return NULL;
1478 WB_END
1479
1480 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1481 uintx result;
1482 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1483 // can't be in VM when we call JNI
1484 ThreadToNativeFromVM ttnfv(thread);
1485 return longBox(thread, env, result);
1486 }
1487 return NULL;
1488 WB_END
1489
1490 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1491 double result;
1492 if (GetMethodOption <double> (thread, env, method, name, &result)) {
1493 // can't be in VM when we call JNI
1494 ThreadToNativeFromVM ttnfv(thread);
1495 return doubleBox(thread, env, result);
1496 }
1497 return NULL;
1498 WB_END
1499
1500 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1501 ccstr ccstrResult;
1502 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1503 // can't be in VM when we call JNI
1504 ThreadToNativeFromVM ttnfv(thread);
1505 jstring result = env->NewStringUTF(ccstrResult);
1506 CHECK_JNI_EXCEPTION_(env, NULL);
1507 return result;
1508 }
1509 return NULL;
1510 WB_END
1511
1512 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1513 oop obj_oop = JNIHandles::resolve(obj);
1514 return MetaspaceShared::is_in_shared_space((void*)obj_oop);
1515 WB_END
1516
1517 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1518 return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1519 WB_END
1520
1521 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1522 return StringTable::shared_string_ignored();
1523 WB_END
1524
1525 //Some convenience methods to deal with objects from java
1526 int WhiteBox::offset_for_field(const char* field_name, oop object,
1527 Symbol* signature_symbol) {
1528 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1529 Thread* THREAD = Thread::current();
1530
1531 //Get the class of our object
1532 Klass* arg_klass = object->klass();
1533 //Turn it into an instance-klass
1534 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1535
1536 //Create symbols to look for in the class
1537 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1538 THREAD);
1539
1540 //To be filled in with an offset of the field we're looking for
1541 fieldDescriptor fd;
1542
1543 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1544 if (res == NULL) {
1545 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1546 name_symbol->as_C_string());
1547 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:classload=info to see the origin of the problem class");
1548 }
1549
1550 //fetch the field at the offset we've found
1551 int dest_offset = fd.offset();
1552
1553 return dest_offset;
1554 }
1555
1556
1557 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1558 int offset = offset_for_field(field_name, object,
1559 vmSymbols::string_signature());
1560 oop string = object->obj_field(offset);
1561 if (string == NULL) {
1562 return NULL;
1563 }
1564 const char* ret = java_lang_String::as_utf8_string(string);
1565 return ret;
1566 }
1567
1568 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1569 int offset =
1570 offset_for_field(field_name, object, vmSymbols::bool_signature());
1571 bool ret = (object->bool_field(offset) == JNI_TRUE);
1572 return ret;
1573 }
1574
1575 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1576 ResourceMark rm;
1577 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1578
1579 // one by one registration natives for exception catching
1580 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1581 CHECK_JNI_EXCEPTION(env);
1582 for (int i = 0, n = method_count; i < n; ++i) {
1583 // Skip dummy entries
1584 if (method_array[i].fnPtr == NULL) continue;
1585 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1586 jthrowable throwable_obj = env->ExceptionOccurred();
1587 if (throwable_obj != NULL) {
1588 env->ExceptionClear();
1589 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1590 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1591 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1592 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1593 method_array[i].name, method_array[i].signature);
1594 }
1595 } else {
1596 // Registration failed unexpectedly.
1597 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1598 method_array[i].name, method_array[i].signature);
1599 env->UnregisterNatives(wbclass);
1600 break;
1601 }
1602 }
1603 }
1604 }
1605
1606 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
1607 // can't be in VM when we call JNI
1608 ThreadToNativeFromVM ttnfv(thread);
1609 const char* dir = env->GetStringUTFChars(compDirect, NULL);
1610 int ret;
1611 {
1612 ThreadInVMfromNative ttvfn(thread); // back to VM
1613 ret = DirectivesParser::parse_string(dir, tty);
1614 }
1615 env->ReleaseStringUTFChars(compDirect, dir);
1616 // -1 for error parsing directive. Return 0 as number of directives added.
1617 if (ret == -1) {
1618 ret = 0;
1619 }
1620 return (jint) ret;
1621 WB_END
1622
1623 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
1624 DirectivesStack::pop(count);
1625 WB_END
1626
1627 #define CC (char*)
1628
1629 static JNINativeMethod methods[] = {
1630 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1631 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1632 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1633 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1634 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1635 {CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
1636 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
1637 {CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
1638 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1639 {CC"parseCommandLine0",
1640 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1641 (void*) &WB_ParseCommandLine
1642 },
1643 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1644 (void*)&WB_AddToBootstrapClassLoaderSearch},
1645 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1646 (void*)&WB_AddToSystemClassLoaderSearch},
1647 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1648 (void*)&WB_GetCompressedOopsMaxHeapSize},
1649 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1650 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1651 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1652 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1653 #if INCLUDE_ALL_GCS
1654 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1655 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1656 {CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
1657 {CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
1658 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
1659 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1660 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1661 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1662 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1663 (void*)&WB_G1AuxiliaryMemoryUsage },
1664 {CC"psVirtualSpaceAlignment",CC"()J", (void*)&WB_PSVirtualSpaceAlignment},
1665 {CC"psHeapGenerationAlignment",CC"()J", (void*)&WB_PSHeapGenerationAlignment},
1666 #endif // INCLUDE_ALL_GCS
1667 #if INCLUDE_NMT
1668 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1669 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1670 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1671 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1672 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1673 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1674 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1675 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1676 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1677 #endif // INCLUDE_NMT
1678 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
1679 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1680 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
1681 (void*)&WB_DeoptimizeMethod },
1682 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
1683 (void*)&WB_IsMethodCompiled },
1684 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1685 (void*)&WB_IsMethodCompilable},
1686 {CC"isMethodQueuedForCompilation0",
1687 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1688 {CC"isIntrinsicAvailable0",
1689 CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1690 (void*)&WB_IsIntrinsicAvailable},
1691 {CC"makeMethodNotCompilable0",
1692 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1693 {CC"testSetDontInlineMethod0",
1694 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1695 {CC"getMethodCompilationLevel0",
1696 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1697 {CC"getMethodEntryBci0",
1698 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1699 {CC"getCompileQueueSize",
1700 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1701 {CC"testSetForceInlineMethod0",
1702 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1703 {CC"enqueueMethodForCompilation0",
1704 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1705 {CC"clearMethodState0",
1706 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1707 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1708 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1709 {CC"matchesMethod",
1710 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1711 (void*)&WB_MatchesMethod},
1712 {CC"matchesInline",
1713 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1714 (void*)&WB_MatchesInline},
1715 {CC"shouldPrintAssembly",
1716 CC"(Ljava/lang/reflect/Executable;I)Z",
1717 (void*)&WB_ShouldPrintAssembly},
1718
1719 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1720 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1721 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1722 {CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1723 {CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1724 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1725 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1726 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1727 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1728 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1729 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1730 (void*)&WB_SetStringVMFlag},
1731 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1732 (void*)&WB_GetBooleanVMFlag},
1733 {CC"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1734 (void*)&WB_GetIntVMFlag},
1735 {CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1736 (void*)&WB_GetUintVMFlag},
1737 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1738 (void*)&WB_GetIntxVMFlag},
1739 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1740 (void*)&WB_GetUintxVMFlag},
1741 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1742 (void*)&WB_GetUint64VMFlag},
1743 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1744 (void*)&WB_GetSizeTVMFlag},
1745 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1746 (void*)&WB_GetDoubleVMFlag},
1747 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1748 (void*)&WB_GetStringVMFlag},
1749 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1750 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1751 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1752 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1753 {CC"allocateMetaspace",
1754 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1755 {CC"freeMetaspace",
1756 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1757 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1758 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1759 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1760 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1761 (void*)&WB_GetNMethod },
1762 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
1763 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1764 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1765 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1766 {CC"getCompilationActivityMode",
1767 CC"()I", (void*)&WB_GetCompilationActivityMode},
1768 {CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
1769 (void*)&WB_GetMethodData },
1770 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1771 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1772 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1773 {CC"DefineModule", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
1774 (void*)&WB_DefineModule },
1775 {CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
1776 (void*)&WB_AddModuleExports },
1777 {CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
1778 (void*)&WB_AddReadsModule },
1779 {CC"CanReadModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)Z",
1780 (void*)&WB_CanReadModule },
1781 {CC"IsExportedToModule", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Z",
1782 (void*)&WB_IsExportedToModule },
1783 {CC"AddModulePackage", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1784 (void*)&WB_AddModulePackage },
1785 {CC"GetModuleByPackageName", CC"(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;",
1786 (void*)&WB_GetModuleByPackageName },
1787 {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1788 (void*)&WB_AddModuleExportsToAllUnnamed },
1789 {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1790 (void*)&WB_AddModuleExportsToAll },
1791 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
1792 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1793 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1794 {CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
1795 {CC"getConstantPoolCacheIndexTag0", CC"()I", (void*)&WB_GetConstantPoolCacheIndexTag},
1796 {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_GetConstantPoolCacheLength},
1797 {CC"remapInstructionOperandFromCPCache0",
1798 CC"(Ljava/lang/Class;I)I", (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
1799 {CC"encodeConstantPoolIndyIndex0",
1800 CC"(I)I", (void*)&WB_ConstantPoolEncodeIndyIndex},
1801 {CC"getMethodBooleanOption",
1802 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1803 (void*)&WB_GetMethodBooleaneOption},
1804 {CC"getMethodIntxOption",
1805 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1806 (void*)&WB_GetMethodIntxOption},
1807 {CC"getMethodUintxOption",
1808 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1809 (void*)&WB_GetMethodUintxOption},
1810 {CC"getMethodDoubleOption",
1811 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1812 (void*)&WB_GetMethodDoubleOption},
1813 {CC"getMethodStringOption",
1814 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1815 (void*)&WB_GetMethodStringOption},
1816 {CC"isShared", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
1817 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
1818 {CC"areSharedStringsIgnored", CC"()Z", (void*)&WB_AreSharedStringsIgnored },
1819 {CC"clearInlineCaches", CC"()V", (void*)&WB_ClearInlineCaches },
1820 {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
1821 (void*)&WB_AddCompilerDirective },
1822 {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
1823
1824 {CC"getGC", CC"()Ljava/lang/String;", (void*)&WB_GetGC},
1825 {CC"gcSelectedByErgo0", CC"()Z", (void*)&WB_GcSelectedByErgo0},
1826 {CC"supportsSerialGC", CC"()Z", (void*)&WB_SupportsSerialGC},
1827 {CC"supportsParallelGC", CC"()Z", (void*)&WB_SupportsParallelGC},
1828 {CC"supportsConcMarkSweepGC", CC"()Z", (void*)&WB_SupportsConcMarkSweepGC},
1829 {CC"supportsG1GC", CC"()Z", (void*)&WB_SupportsG1GC},
1830
1831 };
1832
1833 #undef CC
1834
1835 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1836 {
1837 if (WhiteBoxAPI) {
1838 // Make sure that wbclass is loaded by the null classloader
1839 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1840 Handle loader(ikh->class_loader());
1841 if (loader.is_null()) {
1842 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1843 WhiteBox::register_extended(env, wbclass, thread);
1844 WhiteBox::set_used();
1845 }
1846 }
1847 }
1848 JVM_END