1 /*
2 * Copyright (c) 2012, 2015, 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/stringTable.hpp"
31 #include "code/codeCache.hpp"
32 #include "jvmtifiles/jvmtiEnv.hpp"
33 #include "memory/metadataFactory.hpp"
34 #include "memory/universe.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "prims/wbtestmethods/parserTests.hpp"
37 #include "prims/whitebox.hpp"
38 #include "runtime/arguments.hpp"
39 #include "runtime/compilationPolicy.hpp"
40 #include "runtime/deoptimization.hpp"
41 #include "runtime/interfaceSupport.hpp"
42 #include "runtime/os.hpp"
43 #include "runtime/sweeper.hpp"
44 #include "runtime/javaCalls.hpp"
45 #include "runtime/thread.hpp"
46 #include "runtime/vm_version.hpp"
47 #include "utilities/array.hpp"
48 #include "utilities/debug.hpp"
49 #include "utilities/exceptions.hpp"
50 #include "utilities/macros.hpp"
51 #if INCLUDE_ALL_GCS
52 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
53 #include "gc_implementation/g1/concurrentMark.hpp"
54 #include "gc_implementation/g1/concurrentMarkThread.hpp"
55 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
56 #include "gc_implementation/g1/heapRegionRemSet.hpp"
57 #endif // INCLUDE_ALL_GCS
58 #if INCLUDE_NMT
59 #include "services/mallocSiteTable.hpp"
60 #include "services/memTracker.hpp"
61 #include "utilities/nativeCallStack.hpp"
62 #endif // INCLUDE_NMT
63
64
65 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
66
67 #define SIZE_T_MAX_VALUE ((size_t) -1)
68
69 bool WhiteBox::_used = false;
70 volatile bool WhiteBox::compilation_locked = false;
71
72 class VM_WhiteBoxOperation : public VM_Operation {
73 public:
74 VM_WhiteBoxOperation() { }
75 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
76 bool allow_nested_vm_operations() const { return true; }
77 };
78
79
80 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
81 return (jlong)(void*)JNIHandles::resolve(obj);
82 WB_END
83
84 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
85 return heapOopSize;
86 WB_END
87
88 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
89 return os::vm_page_size();
90 WB_END
91
92 class WBIsKlassAliveClosure : public KlassClosure {
93 Symbol* _name;
94 bool _found;
95 public:
96 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
97
98 void do_klass(Klass* k) {
99 if (_found) return;
100 Symbol* ksym = k->name();
101 if (ksym->fast_compare(_name) == 0) {
102 _found = true;
103 }
104 }
105
106 bool found() const {
107 return _found;
108 }
109 };
110
111 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
112 Handle h_name = JNIHandles::resolve(name);
113 if (h_name.is_null()) return false;
114 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
115 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
116
117 WBIsKlassAliveClosure closure(sym);
118 ClassLoaderDataGraph::classes_do(&closure);
119
120 return closure.found();
121 WB_END
122
123 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
124 #if INCLUDE_JVMTI
125 ResourceMark rm;
126 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
127 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
128 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
129 assert(err == JVMTI_ERROR_NONE, "must not fail");
130 #endif
131 }
132 WB_END
133
134 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
135 #if INCLUDE_JVMTI
136 ResourceMark rm;
137 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
138 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
139 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
140 assert(err == JVMTI_ERROR_NONE, "must not fail");
141 #endif
142 }
143 WB_END
144
145
146 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
147 return (jlong)Arguments::max_heap_for_compressed_oops();
148 }
149 WB_END
150
151 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
152 CollectorPolicy * p = Universe::heap()->collector_policy();
153 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
154 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
155 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
156 p->space_alignment(), p->heap_alignment());
157 }
158 WB_END
159
160 #ifndef PRODUCT
161 // Forward declaration
162 void TestReservedSpace_test();
163 void TestReserveMemorySpecial_test();
164 void TestVirtualSpace_test();
165 void TestMetaspaceAux_test();
166 #endif
167
168 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
169 #ifndef PRODUCT
170 TestReservedSpace_test();
171 TestReserveMemorySpecial_test();
172 TestVirtualSpace_test();
173 TestMetaspaceAux_test();
174 #endif
175 WB_END
176
177 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
178 size_t granularity = os::vm_allocation_granularity();
179 ReservedHeapSpace rhs(100 * granularity, granularity, false);
180 VirtualSpace vs;
181 vs.initialize(rhs, 50 * granularity);
182
183 // Check if constraints are complied
184 if (!( UseCompressedOops && rhs.base() != NULL &&
185 Universe::narrow_oop_base() != NULL &&
186 Universe::narrow_oop_use_implicit_null_checks() )) {
187 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
188 "\tUseCompressedOops is %d\n"
189 "\trhs.base() is "PTR_FORMAT"\n"
190 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
191 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
192 UseCompressedOops,
193 rhs.base(),
194 Universe::narrow_oop_base(),
195 Universe::narrow_oop_use_implicit_null_checks());
196 return;
197 }
198 tty->print_cr("Reading from no access area... ");
199 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
200 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
201 WB_END
202
203 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
204 size_t magnitude, size_t iterations) {
205 size_t granularity = os::vm_allocation_granularity();
206 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
207 VirtualSpace vs;
208 if (!vs.initialize(rhs, 0)) {
209 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
210 return 3;
211 }
212
213 long seed = os::random();
214 tty->print_cr("Random seed is %ld", seed);
215 os::init_random(seed);
216
217 for (size_t i = 0; i < iterations; i++) {
218
219 // Whether we will shrink or grow
220 bool shrink = os::random() % 2L == 0;
221
222 // Get random delta to resize virtual space
223 size_t delta = (size_t)os::random() % magnitude;
224
225 // If we are about to shrink virtual space below zero, then expand instead
226 if (shrink && vs.committed_size() < delta) {
227 shrink = false;
228 }
229
230 // Resizing by delta
231 if (shrink) {
232 vs.shrink_by(delta);
233 } else {
234 // If expanding fails expand_by will silently return false
235 vs.expand_by(delta, true);
236 }
237 }
238 return 0;
239 }
240
241 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
242 jlong reserved_space_size, jlong magnitude, jlong iterations))
243 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
244 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
245 iterations);
246 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
247 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
248 return 1;
249 }
250
251 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
252 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
253 if (sizeof(size_t) < sizeof(jlong)) {
254 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
255 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
256 || iterations > size_t_max_value) {
257 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
258 return 2;
259 }
260 }
261
262 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
263 (size_t) magnitude, (size_t) iterations);
264 WB_END
265
266 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
267 oop p = JNIHandles::resolve(obj);
268 #if INCLUDE_ALL_GCS
269 if (UseG1GC) {
270 G1CollectedHeap* g1 = G1CollectedHeap::heap();
271 const HeapRegion* hr = g1->heap_region_containing(p);
272 if (hr == NULL) {
273 return false;
274 }
275 return !(hr->is_young());
276 } else if (UseParallelGC) {
277 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
278 return !psh->is_in_young(p);
279 }
280 #endif // INCLUDE_ALL_GCS
281 GenCollectedHeap* gch = GenCollectedHeap::heap();
282 return !gch->is_in_young(p);
283 WB_END
284
285 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
286 oop p = JNIHandles::resolve(obj);
287 return p->size() * HeapWordSize;
288 WB_END
289
290 #if INCLUDE_ALL_GCS
291 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
292 G1CollectedHeap* g1 = G1CollectedHeap::heap();
293 oop result = JNIHandles::resolve(obj);
294 const HeapRegion* hr = g1->heap_region_containing(result);
295 return hr->is_humongous();
296 WB_END
297
298 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
299 G1CollectedHeap* g1 = G1CollectedHeap::heap();
300 size_t nr = g1->max_regions();
301 return (jlong)nr;
302 WB_END
303
304 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
305 G1CollectedHeap* g1 = G1CollectedHeap::heap();
306 size_t nr = g1->num_free_regions();
307 return (jlong)nr;
308 WB_END
309
310 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
311 G1CollectedHeap* g1 = G1CollectedHeap::heap();
312 return g1->concurrent_mark()->cmThread()->during_cycle();
313 WB_END
314
315 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
316 G1CollectedHeap* g1h = G1CollectedHeap::heap();
317 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
318 g1h->collect(GCCause::_wb_conc_mark);
319 return true;
320 }
321 return false;
322 WB_END
323
324 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
325 return (jint)HeapRegion::GrainBytes;
326 WB_END
327
328 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
329 ResourceMark rm(THREAD);
330 ThreadToNativeFromVM ttn(thread);
331 G1CollectedHeap* g1h = G1CollectedHeap::heap();
332 MemoryUsage mu = g1h->get_auxiliary_data_memory_usage();
333
334 jclass jclass_memory_usage = env->FindClass("java/lang/management/MemoryUsage");
335 CHECK_JNI_EXCEPTION_(env, NULL);
336 if (jclass_memory_usage == NULL) {
337 THROW_MSG_NULL(vmSymbols::java_lang_NoClassDefFoundError(),
338 "Cannot find class java/lang/management/MemoryUsage.");
339 }
340
341 jmethodID ctor = env->GetMethodID(jclass_memory_usage, "<init>", "(JJJJ)V");
342 CHECK_JNI_EXCEPTION_(env, NULL);
343 if (ctor == NULL) {
344 THROW_MSG_NULL(vmSymbols::java_lang_NoSuchMethodError(),
345 "Cannot find constructor for MemoryUsage(long, long, long, long).");
346 }
347
348 jvalue args[4];
349 args[0].j = 0;
350 args[1].j = mu.used();
351 args[2].j = args[3].j = mu.committed();
352 return env->NewObjectA(jclass_memory_usage, ctor, args);
353 WB_END
354 #endif // INCLUDE_ALL_GCS
355
356 #if INCLUDE_NMT
357 // Alloc memory using the test memory type so that we can use that to see if
358 // NMT picks it up correctly
359 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
360 jlong addr = 0;
361 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
362 return addr;
363 WB_END
364
365 // Alloc memory with pseudo call stack. The test can create psudo malloc
366 // allocation site to stress the malloc tracking.
367 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
368 address pc = (address)(size_t)pseudo_stack;
369 NativeCallStack stack(&pc, 1);
370 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
371 WB_END
372
373 // Free the memory allocated by NMTAllocTest
374 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
375 os::free((void*)(uintptr_t)mem);
376 WB_END
377
378 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
379 jlong addr = 0;
380
381 addr = (jlong)(uintptr_t)os::reserve_memory(size);
382 MemTracker::record_virtual_memory_type((address)addr, mtTest);
383
384 return addr;
385 WB_END
386
387 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
388 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
389 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
390 WB_END
391
392 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
393 os::uncommit_memory((char *)(uintptr_t)addr, size);
394 WB_END
395
396 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
397 os::release_memory((char *)(uintptr_t)addr, size);
398 WB_END
399
400 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
401 return MemTracker::tracking_level() == NMT_detail;
402 WB_END
403
404 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
405 // Test that we can downgrade NMT levels but not upgrade them.
406 if (MemTracker::tracking_level() == NMT_off) {
407 MemTracker::transition_to(NMT_off);
408 return MemTracker::tracking_level() == NMT_off;
409 } else {
410 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
411 MemTracker::transition_to(NMT_summary);
412 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
413
414 // Can't go to detail once NMT is set to summary.
415 MemTracker::transition_to(NMT_detail);
416 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
417
418 // Shutdown sets tracking level to minimal.
419 MemTracker::shutdown();
420 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
421
422 // Once the tracking level is minimal, we cannot increase to summary.
423 // The code ignores this request instead of asserting because if the malloc site
424 // table overflows in another thread, it tries to change the code to summary.
425 MemTracker::transition_to(NMT_summary);
426 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
427
428 // Really can never go up to detail, verify that the code would never do this.
429 MemTracker::transition_to(NMT_detail);
430 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
431 return MemTracker::tracking_level() == NMT_minimal;
432 }
433 WB_END
434
435 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
436 int hash_size = MallocSiteTable::hash_buckets();
437 assert(hash_size > 0, "NMT hash_size should be > 0");
438 return (jint)hash_size;
439 WB_END
440 #endif // INCLUDE_NMT
441
442 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
443 assert(method != NULL, "method should not be null");
444 ThreadToNativeFromVM ttn(thread);
445 return env->FromReflectedMethod(method);
446 }
447
448 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
449 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
450 private:
451 int _result;
452 const bool _make_not_entrant;
453 public:
454 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
455 _result(0), _make_not_entrant(make_not_entrant) { }
456 int result() const { return _result; }
457
458 void doit() {
459 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
460 if (t->has_last_Java_frame()) {
461 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
462 frame* f = fst.current();
463 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
464 RegisterMap* reg_map = fst.register_map();
465 Deoptimization::deoptimize(t, *f, reg_map);
466 if (_make_not_entrant) {
467 nmethod* nm = CodeCache::find_nmethod(f->pc());
468 assert(nm != NULL, "sanity check");
469 nm->make_not_entrant();
470 }
471 ++_result;
472 }
473 }
474 }
475 }
476 }
477 };
478
479 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
480 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
481 VMThread::execute(&op);
482 return op.result();
483 WB_END
484
485 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
486 MutexLockerEx mu(Compile_lock);
487 CodeCache::mark_all_nmethods_for_deoptimization();
488 VM_Deoptimize op;
489 VMThread::execute(&op);
490 WB_END
491
492 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
493 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
494 int result = 0;
495 CHECK_JNI_EXCEPTION_(env, result);
496 MutexLockerEx mu(Compile_lock);
497 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
498 if (is_osr) {
499 result += mh->mark_osr_nmethods();
500 } else if (mh->code() != NULL) {
501 mh->code()->mark_for_deoptimization();
502 ++result;
503 }
504 result += CodeCache::mark_for_deoptimization(mh());
505 if (result > 0) {
506 VM_Deoptimize op;
507 VMThread::execute(&op);
508 }
509 return result;
510 WB_END
511
512 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
513 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
514 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
515 MutexLockerEx mu(Compile_lock);
516 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
517 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
518 if (code == NULL) {
519 return JNI_FALSE;
520 }
521 return (code->is_alive() && !code->is_marked_for_deoptimization());
522 WB_END
523
524 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
525 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
526 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
527 MutexLockerEx mu(Compile_lock);
528 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
529 if (is_osr) {
530 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
531 } else {
532 return CompilationPolicy::can_be_compiled(mh, comp_level);
533 }
534 WB_END
535
536 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
537 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
538 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
539 MutexLockerEx mu(Compile_lock);
540 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
541 return mh->queued_for_compilation();
542 WB_END
543
544 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
545 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
546 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
547 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
548 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
549 return (code != NULL ? code->comp_level() : CompLevel_none);
550 WB_END
551
552 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
553 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
554 CHECK_JNI_EXCEPTION(env);
555 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
556 if (is_osr) {
557 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
558 } else {
559 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
560 }
561 WB_END
562
563 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
564 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
565 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
566 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
567 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
568 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
569 WB_END
570
571 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
572 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
573 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
574 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
575 bool result = mh->dont_inline();
576 mh->set_dont_inline(value == JNI_TRUE);
577 return result;
578 WB_END
579
580 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
581 if (comp_level == CompLevel_any) {
582 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
583 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
584 } else {
585 return CompileBroker::queue_size(comp_level);
586 }
587 WB_END
588
589 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
590 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
591 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
592 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
593 bool result = mh->force_inline();
594 mh->set_force_inline(value == JNI_TRUE);
595 return result;
596 WB_END
597
598 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
599 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
600 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
601 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
602 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
603 MutexLockerEx mu(Compile_lock);
604 return (mh->queued_for_compilation() || nm != NULL);
605 WB_END
606
607 class AlwaysFalseClosure : public BoolObjectClosure {
608 public:
609 bool do_object_b(oop p) { return false; }
610 };
611
612 static AlwaysFalseClosure always_false;
613
614 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
615 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
616 CHECK_JNI_EXCEPTION(env);
617 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
618 MutexLockerEx mu(Compile_lock);
619 MethodData* mdo = mh->method_data();
620 MethodCounters* mcs = mh->method_counters();
621
622 if (mdo != NULL) {
623 mdo->init();
624 ResourceMark rm;
625 int arg_count = mdo->method()->size_of_parameters();
626 for (int i = 0; i < arg_count; i++) {
627 mdo->set_arg_modified(i, 0);
628 }
629 MutexLockerEx mu(mdo->extra_data_lock());
630 mdo->clean_method_data(&always_false);
631 }
632
633 mh->clear_not_c1_compilable();
634 mh->clear_not_c2_compilable();
635 mh->clear_not_c2_osr_compilable();
636 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
637 if (mcs != NULL) {
638 mcs->backedge_counter()->init();
639 mcs->invocation_counter()->init();
640 mcs->set_interpreter_invocation_count(0);
641 mcs->set_interpreter_throwout_count(0);
642
643 #ifdef TIERED
644 mcs->set_rate(0.0F);
645 mh->set_prev_event_count(0);
646 mh->set_prev_time(0);
647 #endif
648 }
649 WB_END
650
651 template <typename T>
652 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
653 if (name == NULL) {
654 return false;
655 }
656 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
657 const char* flag_name = env->GetStringUTFChars(name, NULL);
658 bool result = (*TAt)(flag_name, value, true, true);
659 env->ReleaseStringUTFChars(name, flag_name);
660 return result;
661 }
662
663 template <typename T>
664 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
665 if (name == NULL) {
666 return false;
667 }
668 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
669 const char* flag_name = env->GetStringUTFChars(name, NULL);
670 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
671 env->ReleaseStringUTFChars(name, flag_name);
672 return result;
673 }
674
675 template <typename T>
676 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
677 ResourceMark rm(thread);
678 jclass clazz = env->FindClass(name->as_C_string());
679 CHECK_JNI_EXCEPTION_(env, NULL);
680 jmethodID methodID = env->GetStaticMethodID(clazz,
681 vmSymbols::valueOf_name()->as_C_string(),
682 sig->as_C_string());
683 CHECK_JNI_EXCEPTION_(env, NULL);
684 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
685 CHECK_JNI_EXCEPTION_(env, NULL);
686 return result;
687 }
688
689 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
690 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
691 }
692 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
693 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
694 }
695 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
696 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
697 }
698 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
699 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
700 }*/
701 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
702 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
703 }
704
705 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
706 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
707 const char* flag_name = env->GetStringUTFChars(name, NULL);
708 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
709 env->ReleaseStringUTFChars(name, flag_name);
710 return result;
711 }
712
713 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
714 Flag* flag = getVMFlag(thread, env, name);
715 return (flag != NULL) && flag->is_constant_in_binary();
716 WB_END
717
718 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
719 Flag* flag = getVMFlag(thread, env, name);
720 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
721 WB_END
722
723 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
724 bool result;
725 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
726 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
727 return booleanBox(thread, env, result);
728 }
729 return NULL;
730 WB_END
731
732 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
733 intx result;
734 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
735 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
736 return longBox(thread, env, result);
737 }
738 return NULL;
739 WB_END
740
741 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
742 uintx result;
743 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
744 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
745 return longBox(thread, env, result);
746 }
747 return NULL;
748 WB_END
749
750 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
751 uint64_t result;
752 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
753 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
754 return longBox(thread, env, result);
755 }
756 return NULL;
757 WB_END
758
759 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
760 uintx result;
761 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
762 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
763 return longBox(thread, env, result);
764 }
765 return NULL;
766 WB_END
767
768 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
769 double result;
770 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
771 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
772 return doubleBox(thread, env, result);
773 }
774 return NULL;
775 WB_END
776
777 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
778 ccstr ccstrResult;
779 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
780 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
781 jstring result = env->NewStringUTF(ccstrResult);
782 CHECK_JNI_EXCEPTION_(env, NULL);
783 return result;
784 }
785 return NULL;
786 WB_END
787
788 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
789 bool result = value == JNI_TRUE ? true : false;
790 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
791 WB_END
792
793 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
794 intx result = value;
795 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
796 WB_END
797
798 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
799 uintx result = value;
800 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
801 WB_END
802
803 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
804 uint64_t result = value;
805 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
806 WB_END
807
808 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
809 size_t result = value;
810 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
811 WB_END
812
813 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
814 double result = value;
815 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
816 WB_END
817
818 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
819 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
820 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
821 ccstr ccstrResult = ccstrValue;
822 bool needFree;
823 {
824 ThreadInVMfromNative ttvfn(thread); // back to VM
825 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
826 }
827 if (value != NULL) {
828 env->ReleaseStringUTFChars(value, ccstrValue);
829 }
830 if (needFree) {
831 FREE_C_HEAP_ARRAY(char, ccstrResult);
832 }
833 WB_END
834
835 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
836 WhiteBox::compilation_locked = true;
837 WB_END
838
839 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
840 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
841 WhiteBox::compilation_locked = false;
842 mo.notify_all();
843 WB_END
844
845 void WhiteBox::sweeper_thread_entry(JavaThread* thread, TRAPS) {
846 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
847 {
848 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
849 NMethodSweeper::_should_sweep = true;
850 }
851 NMethodSweeper::possibly_sweep();
852 }
853
854 JavaThread* WhiteBox::create_sweeper_thread(TRAPS) {
855 // create sweeper thread w/ custom entry -- one iteration instead of loop
856 CodeCacheSweeperThread* sweeper_thread = new CodeCacheSweeperThread();
857 sweeper_thread->set_entry_point(&WhiteBox::sweeper_thread_entry);
858
859 // create j.l.Thread object and associate it w/ sweeper thread
860 {
861 // inherit deamon property from current thread
862 bool is_daemon = java_lang_Thread::is_daemon(JavaThread::current()->threadObj());
863
864 HandleMark hm(THREAD);
865 Handle thread_group(THREAD, Universe::system_thread_group());
866 const char* name = "WB Sweeper thread";
867 sweeper_thread->allocate_threadObj(thread_group, name, is_daemon, THREAD);
868 }
869
870 {
871 MutexLocker mu(Threads_lock, THREAD);
872 Threads::add(sweeper_thread);
873 }
874 return sweeper_thread;
875 }
876
877 WB_ENTRY(jobject, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
878 JavaThread* sweeper_thread = WhiteBox::create_sweeper_thread(Thread::current());
879 if (sweeper_thread == NULL) {
880 return NULL;
881 }
882 jobject result = JNIHandles::make_local(env, sweeper_thread->threadObj());
883 Thread::start(sweeper_thread);
884 return result;
885 WB_END
886
887 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
888 ResourceMark rm(THREAD);
889 int len;
890 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
891 return (StringTable::lookup(name, len) != NULL);
892 WB_END
893
894 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
895 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
896 Universe::heap()->collect(GCCause::_last_ditch_collection);
897 #if INCLUDE_ALL_GCS
898 if (UseG1GC) {
899 // Needs to be cleared explicitly for G1
900 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
901 }
902 #endif // INCLUDE_ALL_GCS
903 WB_END
904
905 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
906 Universe::heap()->collect(GCCause::_wb_young_gc);
907 WB_END
908
909 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
910 // static+volatile in order to force the read to happen
911 // (not be eliminated by the compiler)
912 static char c;
913 static volatile char* p;
914
915 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
916 if (p == NULL) {
917 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
918 }
919
920 c = *p;
921 WB_END
922
923 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
924 const char* cpu_features = VM_Version::cpu_features();
925 ThreadToNativeFromVM ttn(thread);
926 jstring features_string = env->NewStringUTF(cpu_features);
927
928 CHECK_JNI_EXCEPTION_(env, NULL);
929
930 return features_string;
931 WB_END
932
933 int WhiteBox::get_blob_type(const CodeBlob* code) {
934 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
935 return CodeCache::get_code_heap(code)->code_blob_type();
936 }
937
938 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
939 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
940 return CodeCache::get_code_heap(blob_type);
941 }
942
943 struct CodeBlobStub {
944 CodeBlobStub(const CodeBlob* blob) :
945 name(os::strdup(blob->name())),
946 size(blob->size()),
947 blob_type(WhiteBox::get_blob_type(blob)) { }
948 ~CodeBlobStub() { os::free((void*) name); }
949 const char* const name;
950 const int size;
951 const int blob_type;
952 };
953
954 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
955 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
956 CHECK_JNI_EXCEPTION_(env, NULL);
957 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
958
959 jstring name = env->NewStringUTF(cb->name);
960 CHECK_JNI_EXCEPTION_(env, NULL);
961 env->SetObjectArrayElement(result, 0, name);
962
963 jobject obj = integerBox(thread, env, cb->size);
964 CHECK_JNI_EXCEPTION_(env, NULL);
965 env->SetObjectArrayElement(result, 1, obj);
966
967 obj = integerBox(thread, env, cb->blob_type);
968 CHECK_JNI_EXCEPTION_(env, NULL);
969 env->SetObjectArrayElement(result, 2, obj);
970
971 return result;
972 }
973
974 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
975 ResourceMark rm(THREAD);
976 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
977 CHECK_JNI_EXCEPTION_(env, NULL);
978 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
979 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
980 jobjectArray result = NULL;
981 if (code == NULL) {
982 return result;
983 }
984 int insts_size = code->insts_size();
985
986 ThreadToNativeFromVM ttn(thread);
987 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
988 CHECK_JNI_EXCEPTION_(env, NULL);
989 result = env->NewObjectArray(4, clazz, NULL);
990 if (result == NULL) {
991 return result;
992 }
993
994 CodeBlobStub stub(code);
995 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
996 env->SetObjectArrayElement(result, 0, codeBlob);
997
998 jobject level = integerBox(thread, env, code->comp_level());
999 CHECK_JNI_EXCEPTION_(env, NULL);
1000 env->SetObjectArrayElement(result, 1, level);
1001
1002 jbyteArray insts = env->NewByteArray(insts_size);
1003 CHECK_JNI_EXCEPTION_(env, NULL);
1004 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1005 env->SetObjectArrayElement(result, 2, insts);
1006
1007 jobject id = integerBox(thread, env, code->compile_id());
1008 CHECK_JNI_EXCEPTION_(env, NULL);
1009 env->SetObjectArrayElement(result, 3, id);
1010
1011 return result;
1012 WB_END
1013
1014 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1015 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1016 BufferBlob* blob;
1017 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1018 if (full_size < size) {
1019 full_size += round_to(size - full_size, oopSize);
1020 }
1021 {
1022 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1023 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1024 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1025 }
1026 // Track memory usage statistic after releasing CodeCache_lock
1027 MemoryService::track_code_cache_memory_usage();
1028 return blob;
1029 }
1030
1031 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1032 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1033 WB_END
1034
1035 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1036 BufferBlob::free((BufferBlob*) addr);
1037 WB_END
1038
1039 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1040 ResourceMark rm;
1041 GrowableArray<CodeBlobStub*> blobs;
1042 {
1043 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1044 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1045 if (heap == NULL) {
1046 return NULL;
1047 }
1048 for (CodeBlob* cb = (CodeBlob*) heap->first();
1049 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1050 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1051 new (stub) CodeBlobStub(cb);
1052 blobs.append(stub);
1053 }
1054 }
1055 if (blobs.length() == 0) {
1056 return NULL;
1057 }
1058 ThreadToNativeFromVM ttn(thread);
1059 jobjectArray result = NULL;
1060 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1061 CHECK_JNI_EXCEPTION_(env, NULL);
1062 result = env->NewObjectArray(blobs.length(), clazz, NULL);
1063 if (result == NULL) {
1064 return result;
1065 }
1066 int i = 0;
1067 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1068 it != blobs.end(); ++it) {
1069 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1070 env->SetObjectArrayElement(result, i, obj);
1071 ++i;
1072 }
1073 return result;
1074 WB_END
1075
1076 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1077 return CompileBroker::get_compilation_activity_mode();
1078 WB_END
1079
1080 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1081 ThreadToNativeFromVM ttn(thread);
1082 CodeBlobStub stub((CodeBlob*) addr);
1083 return codeBlob2objectArray(thread, env, &stub);
1084 WB_END
1085
1086 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1087 return (jlong) Thread::current()->stack_size();
1088 WB_END
1089
1090 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1091 JavaThread* t = JavaThread::current();
1092 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
1093 WB_END
1094
1095 int WhiteBox::array_bytes_to_length(size_t bytes) {
1096 return Array<u1>::bytes_to_length(bytes);
1097 }
1098
1099 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1100 if (size < 0) {
1101 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1102 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1103 }
1104
1105 oop class_loader_oop = JNIHandles::resolve(class_loader);
1106 ClassLoaderData* cld = class_loader_oop != NULL
1107 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1108 : ClassLoaderData::the_null_class_loader_data();
1109
1110 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1111
1112 return (jlong)(uintptr_t)metadata;
1113 WB_END
1114
1115 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1116 oop class_loader_oop = JNIHandles::resolve(class_loader);
1117 ClassLoaderData* cld = class_loader_oop != NULL
1118 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1119 : ClassLoaderData::the_null_class_loader_data();
1120
1121 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1122 WB_END
1123
1124 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1125 if (inc < 0) {
1126 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1127 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1128 }
1129
1130 jlong max_size_t = (jlong) ((size_t) -1);
1131 if (inc > max_size_t) {
1132 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1133 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1134 }
1135
1136 size_t new_cap_until_GC = 0;
1137 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1138 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1139 if (!success) {
1140 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1141 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1142 "due to contention with another thread");
1143 }
1144 return (jlong) new_cap_until_GC;
1145 WB_END
1146
1147 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1148 return (jlong) MetaspaceGC::capacity_until_GC();
1149 WB_END
1150
1151 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1152 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1153 Monitor::_safepoint_check_always :
1154 Monitor::_safepoint_check_never;
1155 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1156 attemptedNoSafepointValue == JNI_TRUE);
1157 WB_END
1158
1159 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1160 oop obj_oop = JNIHandles::resolve(obj);
1161 return (jboolean) obj_oop->mark()->has_monitor();
1162 WB_END
1163
1164 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1165 VM_ForceSafepoint force_safepoint_op;
1166 VMThread::execute(&force_safepoint_op);
1167 WB_END
1168
1169 //Some convenience methods to deal with objects from java
1170 int WhiteBox::offset_for_field(const char* field_name, oop object,
1171 Symbol* signature_symbol) {
1172 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1173 Thread* THREAD = Thread::current();
1174
1175 //Get the class of our object
1176 Klass* arg_klass = object->klass();
1177 //Turn it into an instance-klass
1178 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1179
1180 //Create symbols to look for in the class
1181 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1182 THREAD);
1183
1184 //To be filled in with an offset of the field we're looking for
1185 fieldDescriptor fd;
1186
1187 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1188 if (res == NULL) {
1189 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1190 name_symbol->as_C_string());
1191 fatal("Invalid layout of preloaded class");
1192 }
1193
1194 //fetch the field at the offset we've found
1195 int dest_offset = fd.offset();
1196
1197 return dest_offset;
1198 }
1199
1200
1201 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1202 int offset = offset_for_field(field_name, object,
1203 vmSymbols::string_signature());
1204 oop string = object->obj_field(offset);
1205 if (string == NULL) {
1206 return NULL;
1207 }
1208 const char* ret = java_lang_String::as_utf8_string(string);
1209 return ret;
1210 }
1211
1212 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1213 int offset =
1214 offset_for_field(field_name, object, vmSymbols::bool_signature());
1215 bool ret = (object->bool_field(offset) == JNI_TRUE);
1216 return ret;
1217 }
1218
1219 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1220 ResourceMark rm;
1221 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1222
1223 // one by one registration natives for exception catching
1224 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1225 CHECK_JNI_EXCEPTION(env);
1226 for (int i = 0, n = method_count; i < n; ++i) {
1227 // Skip dummy entries
1228 if (method_array[i].fnPtr == NULL) continue;
1229 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1230 jthrowable throwable_obj = env->ExceptionOccurred();
1231 if (throwable_obj != NULL) {
1232 env->ExceptionClear();
1233 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1234 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1235 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1236 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1237 method_array[i].name, method_array[i].signature);
1238 }
1239 } else {
1240 // Registration failed unexpectedly.
1241 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1242 method_array[i].name, method_array[i].signature);
1243 env->UnregisterNatives(wbclass);
1244 break;
1245 }
1246 }
1247 }
1248 }
1249
1250 #define CC (char*)
1251
1252 static JNINativeMethod methods[] = {
1253 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1254 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1255 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1256 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1257 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1258 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1259 {CC"parseCommandLine",
1260 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1261 (void*) &WB_ParseCommandLine
1262 },
1263 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V",
1264 (void*)&WB_AddToBootstrapClassLoaderSearch},
1265 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V",
1266 (void*)&WB_AddToSystemClassLoaderSearch},
1267 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1268 (void*)&WB_GetCompressedOopsMaxHeapSize},
1269 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1270 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1271 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1272 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1273 #if INCLUDE_ALL_GCS
1274 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1275 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1276 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
1277 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1278 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1279 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1280 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1281 (void*)&WB_G1AuxiliaryMemoryUsage },
1282 #endif // INCLUDE_ALL_GCS
1283 #if INCLUDE_NMT
1284 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1285 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1286 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1287 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1288 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1289 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1290 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1291 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1292 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1293 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1294 #endif // INCLUDE_NMT
1295 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
1296 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1297 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1298 (void*)&WB_DeoptimizeMethod },
1299 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1300 (void*)&WB_IsMethodCompiled },
1301 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1302 (void*)&WB_IsMethodCompilable},
1303 {CC"isMethodQueuedForCompilation",
1304 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1305 {CC"makeMethodNotCompilable",
1306 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1307 {CC"testSetDontInlineMethod",
1308 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1309 {CC"getMethodCompilationLevel",
1310 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1311 {CC"getMethodEntryBci",
1312 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1313 {CC"getCompileQueueSize",
1314 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1315 {CC"testSetForceInlineMethod",
1316 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1317 {CC"enqueueMethodForCompilation",
1318 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1319 {CC"clearMethodState",
1320 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1321 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1322 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1323 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1324 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1325 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1326 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1327 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1328 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1329 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1330 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1331 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1332 (void*)&WB_SetStringVMFlag},
1333 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1334 (void*)&WB_GetBooleanVMFlag},
1335 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1336 (void*)&WB_GetIntxVMFlag},
1337 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1338 (void*)&WB_GetUintxVMFlag},
1339 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1340 (void*)&WB_GetUint64VMFlag},
1341 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1342 (void*)&WB_GetSizeTVMFlag},
1343 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1344 (void*)&WB_GetDoubleVMFlag},
1345 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1346 (void*)&WB_GetStringVMFlag},
1347 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1348 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1349 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1350 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1351 {CC"allocateMetaspace",
1352 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1353 {CC"freeMetaspace",
1354 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1355 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1356 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1357 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1358 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1359 (void*)&WB_GetNMethod },
1360 {CC"forceNMethodSweep0", CC"()Ljava/lang/Thread;", (void*)&WB_ForceNMethodSweep },
1361 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1362 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1363 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1364 {CC"getCompilationActivityMode",
1365 CC"()I", (void*)&WB_GetCompilationActivityMode},
1366 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1367 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1368 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1369 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
1370 {CC"isMonitorInflated", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1371 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1372 };
1373
1374 #undef CC
1375
1376 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1377 {
1378 if (WhiteBoxAPI) {
1379 // Make sure that wbclass is loaded by the null classloader
1380 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1381 Handle loader(ikh->class_loader());
1382 if (loader.is_null()) {
1383 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1384 WhiteBox::register_extended(env, wbclass, thread);
1385 WhiteBox::set_used();
1386 }
1387 }
1388 }
1389 JVM_END