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 G1CollectedHeap* g1h = G1CollectedHeap::heap();
331 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
332 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
333 return JNIHandles::make_local(env, h());
334 WB_END
335 #endif // INCLUDE_ALL_GCS
336
337 #if INCLUDE_NMT
338 // Alloc memory using the test memory type so that we can use that to see if
339 // NMT picks it up correctly
340 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
341 jlong addr = 0;
342 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
343 return addr;
344 WB_END
345
346 // Alloc memory with pseudo call stack. The test can create psudo malloc
347 // allocation site to stress the malloc tracking.
348 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
349 address pc = (address)(size_t)pseudo_stack;
350 NativeCallStack stack(&pc, 1);
351 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
352 WB_END
353
354 // Free the memory allocated by NMTAllocTest
355 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
356 os::free((void*)(uintptr_t)mem);
357 WB_END
358
359 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
360 jlong addr = 0;
361
362 addr = (jlong)(uintptr_t)os::reserve_memory(size);
363 MemTracker::record_virtual_memory_type((address)addr, mtTest);
364
365 return addr;
366 WB_END
367
368 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
369 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
370 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
371 WB_END
372
373 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
374 os::uncommit_memory((char *)(uintptr_t)addr, size);
375 WB_END
376
377 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
378 os::release_memory((char *)(uintptr_t)addr, size);
379 WB_END
380
381 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
382 return MemTracker::tracking_level() == NMT_detail;
383 WB_END
384
385 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
386 // Test that we can downgrade NMT levels but not upgrade them.
387 if (MemTracker::tracking_level() == NMT_off) {
388 MemTracker::transition_to(NMT_off);
389 return MemTracker::tracking_level() == NMT_off;
390 } else {
391 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
392 MemTracker::transition_to(NMT_summary);
393 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
394
395 // Can't go to detail once NMT is set to summary.
396 MemTracker::transition_to(NMT_detail);
397 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
398
399 // Shutdown sets tracking level to minimal.
400 MemTracker::shutdown();
401 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
402
403 // Once the tracking level is minimal, we cannot increase to summary.
404 // The code ignores this request instead of asserting because if the malloc site
405 // table overflows in another thread, it tries to change the code to summary.
406 MemTracker::transition_to(NMT_summary);
407 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
408
409 // Really can never go up to detail, verify that the code would never do this.
410 MemTracker::transition_to(NMT_detail);
411 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
412 return MemTracker::tracking_level() == NMT_minimal;
413 }
414 WB_END
415
416 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
417 int hash_size = MallocSiteTable::hash_buckets();
418 assert(hash_size > 0, "NMT hash_size should be > 0");
419 return (jint)hash_size;
420 WB_END
421 #endif // INCLUDE_NMT
422
423 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
424 assert(method != NULL, "method should not be null");
425 ThreadToNativeFromVM ttn(thread);
426 return env->FromReflectedMethod(method);
427 }
428
429 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
430 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
431 private:
432 int _result;
433 const bool _make_not_entrant;
434 public:
435 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
436 _result(0), _make_not_entrant(make_not_entrant) { }
437 int result() const { return _result; }
438
439 void doit() {
440 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
441 if (t->has_last_Java_frame()) {
442 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
443 frame* f = fst.current();
444 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
445 RegisterMap* reg_map = fst.register_map();
446 Deoptimization::deoptimize(t, *f, reg_map);
447 if (_make_not_entrant) {
448 nmethod* nm = CodeCache::find_nmethod(f->pc());
449 assert(nm != NULL, "sanity check");
450 nm->make_not_entrant();
451 }
452 ++_result;
453 }
454 }
455 }
456 }
457 }
458 };
459
460 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
461 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
462 VMThread::execute(&op);
463 return op.result();
464 WB_END
465
466 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
467 MutexLockerEx mu(Compile_lock);
468 CodeCache::mark_all_nmethods_for_deoptimization();
469 VM_Deoptimize op;
470 VMThread::execute(&op);
471 WB_END
472
473 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
474 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
475 int result = 0;
476 CHECK_JNI_EXCEPTION_(env, result);
477 MutexLockerEx mu(Compile_lock);
478 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
479 if (is_osr) {
480 result += mh->mark_osr_nmethods();
481 } else if (mh->code() != NULL) {
482 mh->code()->mark_for_deoptimization();
483 ++result;
484 }
485 result += CodeCache::mark_for_deoptimization(mh());
486 if (result > 0) {
487 VM_Deoptimize op;
488 VMThread::execute(&op);
489 }
490 return result;
491 WB_END
492
493 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
494 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
495 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
496 MutexLockerEx mu(Compile_lock);
497 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
498 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
499 if (code == NULL) {
500 return JNI_FALSE;
501 }
502 return (code->is_alive() && !code->is_marked_for_deoptimization());
503 WB_END
504
505 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
506 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
507 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
508 MutexLockerEx mu(Compile_lock);
509 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
510 if (is_osr) {
511 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
512 } else {
513 return CompilationPolicy::can_be_compiled(mh, comp_level);
514 }
515 WB_END
516
517 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
518 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
519 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
520 MutexLockerEx mu(Compile_lock);
521 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
522 return mh->queued_for_compilation();
523 WB_END
524
525 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
526 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
527 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
528 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
529 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
530 return (code != NULL ? code->comp_level() : CompLevel_none);
531 WB_END
532
533 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
534 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
535 CHECK_JNI_EXCEPTION(env);
536 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
537 if (is_osr) {
538 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
539 } else {
540 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
541 }
542 WB_END
543
544 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
545 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
546 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
547 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
548 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
549 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
550 WB_END
551
552 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
553 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
554 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
555 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
556 bool result = mh->dont_inline();
557 mh->set_dont_inline(value == JNI_TRUE);
558 return result;
559 WB_END
560
561 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
562 if (comp_level == CompLevel_any) {
563 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
564 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
565 } else {
566 return CompileBroker::queue_size(comp_level);
567 }
568 WB_END
569
570 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
571 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
572 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
573 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
574 bool result = mh->force_inline();
575 mh->set_force_inline(value == JNI_TRUE);
576 return result;
577 WB_END
578
579 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
580 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
581 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
582 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
583 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
584 MutexLockerEx mu(Compile_lock);
585 return (mh->queued_for_compilation() || nm != NULL);
586 WB_END
587
588 class AlwaysFalseClosure : public BoolObjectClosure {
589 public:
590 bool do_object_b(oop p) { return false; }
591 };
592
593 static AlwaysFalseClosure always_false;
594
595 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
596 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
597 CHECK_JNI_EXCEPTION(env);
598 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
599 MutexLockerEx mu(Compile_lock);
600 MethodData* mdo = mh->method_data();
601 MethodCounters* mcs = mh->method_counters();
602
603 if (mdo != NULL) {
604 mdo->init();
605 ResourceMark rm;
606 int arg_count = mdo->method()->size_of_parameters();
607 for (int i = 0; i < arg_count; i++) {
608 mdo->set_arg_modified(i, 0);
609 }
610 MutexLockerEx mu(mdo->extra_data_lock());
611 mdo->clean_method_data(&always_false);
612 }
613
614 mh->clear_not_c1_compilable();
615 mh->clear_not_c2_compilable();
616 mh->clear_not_c2_osr_compilable();
617 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
618 if (mcs != NULL) {
619 mcs->backedge_counter()->init();
620 mcs->invocation_counter()->init();
621 mcs->set_interpreter_invocation_count(0);
622 mcs->set_interpreter_throwout_count(0);
623
624 #ifdef TIERED
625 mcs->set_rate(0.0F);
626 mh->set_prev_event_count(0);
627 mh->set_prev_time(0);
628 #endif
629 }
630 WB_END
631
632 template <typename T>
633 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
634 if (name == NULL) {
635 return false;
636 }
637 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
638 const char* flag_name = env->GetStringUTFChars(name, NULL);
639 bool result = (*TAt)(flag_name, value, true, true);
640 env->ReleaseStringUTFChars(name, flag_name);
641 return result;
642 }
643
644 template <typename T>
645 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
646 if (name == NULL) {
647 return false;
648 }
649 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
650 const char* flag_name = env->GetStringUTFChars(name, NULL);
651 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
652 env->ReleaseStringUTFChars(name, flag_name);
653 return result;
654 }
655
656 template <typename T>
657 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
658 ResourceMark rm(thread);
659 jclass clazz = env->FindClass(name->as_C_string());
660 CHECK_JNI_EXCEPTION_(env, NULL);
661 jmethodID methodID = env->GetStaticMethodID(clazz,
662 vmSymbols::valueOf_name()->as_C_string(),
663 sig->as_C_string());
664 CHECK_JNI_EXCEPTION_(env, NULL);
665 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
666 CHECK_JNI_EXCEPTION_(env, NULL);
667 return result;
668 }
669
670 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
671 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
672 }
673 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
674 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
675 }
676 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
677 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
678 }
679 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
680 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
681 }*/
682 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
683 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
684 }
685
686 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
687 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
688 const char* flag_name = env->GetStringUTFChars(name, NULL);
689 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
690 env->ReleaseStringUTFChars(name, flag_name);
691 return result;
692 }
693
694 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
695 Flag* flag = getVMFlag(thread, env, name);
696 return (flag != NULL) && flag->is_constant_in_binary();
697 WB_END
698
699 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
700 Flag* flag = getVMFlag(thread, env, name);
701 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
702 WB_END
703
704 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
705 bool result;
706 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
707 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
708 return booleanBox(thread, env, result);
709 }
710 return NULL;
711 WB_END
712
713 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
714 intx result;
715 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
716 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
717 return longBox(thread, env, result);
718 }
719 return NULL;
720 WB_END
721
722 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
723 uintx result;
724 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
725 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
726 return longBox(thread, env, result);
727 }
728 return NULL;
729 WB_END
730
731 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
732 uint64_t result;
733 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
734 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
735 return longBox(thread, env, result);
736 }
737 return NULL;
738 WB_END
739
740 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
741 uintx result;
742 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
743 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
744 return longBox(thread, env, result);
745 }
746 return NULL;
747 WB_END
748
749 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
750 double result;
751 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
752 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
753 return doubleBox(thread, env, result);
754 }
755 return NULL;
756 WB_END
757
758 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
759 ccstr ccstrResult;
760 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
761 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
762 jstring result = env->NewStringUTF(ccstrResult);
763 CHECK_JNI_EXCEPTION_(env, NULL);
764 return result;
765 }
766 return NULL;
767 WB_END
768
769 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
770 bool result = value == JNI_TRUE ? true : false;
771 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
772 WB_END
773
774 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
775 intx result = value;
776 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
777 WB_END
778
779 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
780 uintx result = value;
781 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
782 WB_END
783
784 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
785 uint64_t result = value;
786 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
787 WB_END
788
789 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
790 size_t result = value;
791 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
792 WB_END
793
794 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
795 double result = value;
796 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
797 WB_END
798
799 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
800 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
801 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
802 ccstr ccstrResult = ccstrValue;
803 bool needFree;
804 {
805 ThreadInVMfromNative ttvfn(thread); // back to VM
806 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
807 }
808 if (value != NULL) {
809 env->ReleaseStringUTFChars(value, ccstrValue);
810 }
811 if (needFree) {
812 FREE_C_HEAP_ARRAY(char, ccstrResult);
813 }
814 WB_END
815
816 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
817 WhiteBox::compilation_locked = true;
818 WB_END
819
820 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
821 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
822 WhiteBox::compilation_locked = false;
823 mo.notify_all();
824 WB_END
825
826 void WhiteBox::sweeper_thread_entry(JavaThread* thread, TRAPS) {
827 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
828 {
829 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
830 NMethodSweeper::_should_sweep = true;
831 }
832 NMethodSweeper::possibly_sweep();
833 }
834
835 JavaThread* WhiteBox::create_sweeper_thread(TRAPS) {
836 // create sweeper thread w/ custom entry -- one iteration instead of loop
837 CodeCacheSweeperThread* sweeper_thread = new CodeCacheSweeperThread();
838 sweeper_thread->set_entry_point(&WhiteBox::sweeper_thread_entry);
839
840 // create j.l.Thread object and associate it w/ sweeper thread
841 {
842 // inherit deamon property from current thread
843 bool is_daemon = java_lang_Thread::is_daemon(JavaThread::current()->threadObj());
844
845 HandleMark hm(THREAD);
846 Handle thread_group(THREAD, Universe::system_thread_group());
847 const char* name = "WB Sweeper thread";
848 sweeper_thread->allocate_threadObj(thread_group, name, is_daemon, THREAD);
849 }
850
851 {
852 MutexLocker mu(Threads_lock, THREAD);
853 Threads::add(sweeper_thread);
854 }
855 return sweeper_thread;
856 }
857
858 WB_ENTRY(jobject, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
859 JavaThread* sweeper_thread = WhiteBox::create_sweeper_thread(Thread::current());
860 if (sweeper_thread == NULL) {
861 return NULL;
862 }
863 jobject result = JNIHandles::make_local(env, sweeper_thread->threadObj());
864 Thread::start(sweeper_thread);
865 return result;
866 WB_END
867
868 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
869 ResourceMark rm(THREAD);
870 int len;
871 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
872 return (StringTable::lookup(name, len) != NULL);
873 WB_END
874
875 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
876 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
877 Universe::heap()->collect(GCCause::_last_ditch_collection);
878 #if INCLUDE_ALL_GCS
879 if (UseG1GC) {
880 // Needs to be cleared explicitly for G1
881 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
882 }
883 #endif // INCLUDE_ALL_GCS
884 WB_END
885
886 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
887 Universe::heap()->collect(GCCause::_wb_young_gc);
888 WB_END
889
890 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
891 // static+volatile in order to force the read to happen
892 // (not be eliminated by the compiler)
893 static char c;
894 static volatile char* p;
895
896 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
897 if (p == NULL) {
898 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
899 }
900
901 c = *p;
902 WB_END
903
904 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
905 const char* cpu_features = VM_Version::cpu_features();
906 ThreadToNativeFromVM ttn(thread);
907 jstring features_string = env->NewStringUTF(cpu_features);
908
909 CHECK_JNI_EXCEPTION_(env, NULL);
910
911 return features_string;
912 WB_END
913
914 int WhiteBox::get_blob_type(const CodeBlob* code) {
915 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
916 return CodeCache::get_code_heap(code)->code_blob_type();
917 }
918
919 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
920 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
921 return CodeCache::get_code_heap(blob_type);
922 }
923
924 struct CodeBlobStub {
925 CodeBlobStub(const CodeBlob* blob) :
926 name(os::strdup(blob->name())),
927 size(blob->size()),
928 blob_type(WhiteBox::get_blob_type(blob)) { }
929 ~CodeBlobStub() { os::free((void*) name); }
930 const char* const name;
931 const int size;
932 const int blob_type;
933 };
934
935 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
936 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
937 CHECK_JNI_EXCEPTION_(env, NULL);
938 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
939
940 jstring name = env->NewStringUTF(cb->name);
941 CHECK_JNI_EXCEPTION_(env, NULL);
942 env->SetObjectArrayElement(result, 0, name);
943
944 jobject obj = integerBox(thread, env, cb->size);
945 CHECK_JNI_EXCEPTION_(env, NULL);
946 env->SetObjectArrayElement(result, 1, obj);
947
948 obj = integerBox(thread, env, cb->blob_type);
949 CHECK_JNI_EXCEPTION_(env, NULL);
950 env->SetObjectArrayElement(result, 2, obj);
951
952 return result;
953 }
954
955 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
956 ResourceMark rm(THREAD);
957 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
958 CHECK_JNI_EXCEPTION_(env, NULL);
959 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
960 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
961 jobjectArray result = NULL;
962 if (code == NULL) {
963 return result;
964 }
965 int insts_size = code->insts_size();
966
967 ThreadToNativeFromVM ttn(thread);
968 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
969 CHECK_JNI_EXCEPTION_(env, NULL);
970 result = env->NewObjectArray(4, clazz, NULL);
971 if (result == NULL) {
972 return result;
973 }
974
975 CodeBlobStub stub(code);
976 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
977 env->SetObjectArrayElement(result, 0, codeBlob);
978
979 jobject level = integerBox(thread, env, code->comp_level());
980 CHECK_JNI_EXCEPTION_(env, NULL);
981 env->SetObjectArrayElement(result, 1, level);
982
983 jbyteArray insts = env->NewByteArray(insts_size);
984 CHECK_JNI_EXCEPTION_(env, NULL);
985 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
986 env->SetObjectArrayElement(result, 2, insts);
987
988 jobject id = integerBox(thread, env, code->compile_id());
989 CHECK_JNI_EXCEPTION_(env, NULL);
990 env->SetObjectArrayElement(result, 3, id);
991
992 return result;
993 WB_END
994
995 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
996 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
997 BufferBlob* blob;
998 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
999 if (full_size < size) {
1000 full_size += round_to(size - full_size, oopSize);
1001 }
1002 {
1003 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1004 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1005 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1006 }
1007 // Track memory usage statistic after releasing CodeCache_lock
1008 MemoryService::track_code_cache_memory_usage();
1009 return blob;
1010 }
1011
1012 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1013 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1014 WB_END
1015
1016 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1017 BufferBlob::free((BufferBlob*) addr);
1018 WB_END
1019
1020 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1021 ResourceMark rm;
1022 GrowableArray<CodeBlobStub*> blobs;
1023 {
1024 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1025 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1026 if (heap == NULL) {
1027 return NULL;
1028 }
1029 for (CodeBlob* cb = (CodeBlob*) heap->first();
1030 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1031 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1032 new (stub) CodeBlobStub(cb);
1033 blobs.append(stub);
1034 }
1035 }
1036 if (blobs.length() == 0) {
1037 return NULL;
1038 }
1039 ThreadToNativeFromVM ttn(thread);
1040 jobjectArray result = NULL;
1041 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1042 CHECK_JNI_EXCEPTION_(env, NULL);
1043 result = env->NewObjectArray(blobs.length(), clazz, NULL);
1044 if (result == NULL) {
1045 return result;
1046 }
1047 int i = 0;
1048 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1049 it != blobs.end(); ++it) {
1050 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1051 env->SetObjectArrayElement(result, i, obj);
1052 ++i;
1053 }
1054 return result;
1055 WB_END
1056
1057 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1058 return CompileBroker::get_compilation_activity_mode();
1059 WB_END
1060
1061 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1062 ThreadToNativeFromVM ttn(thread);
1063 CodeBlobStub stub((CodeBlob*) addr);
1064 return codeBlob2objectArray(thread, env, &stub);
1065 WB_END
1066
1067 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1068 return (jlong) Thread::current()->stack_size();
1069 WB_END
1070
1071 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1072 JavaThread* t = JavaThread::current();
1073 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
1074 WB_END
1075
1076 int WhiteBox::array_bytes_to_length(size_t bytes) {
1077 return Array<u1>::bytes_to_length(bytes);
1078 }
1079
1080 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1081 if (size < 0) {
1082 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1083 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1084 }
1085
1086 oop class_loader_oop = JNIHandles::resolve(class_loader);
1087 ClassLoaderData* cld = class_loader_oop != NULL
1088 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1089 : ClassLoaderData::the_null_class_loader_data();
1090
1091 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1092
1093 return (jlong)(uintptr_t)metadata;
1094 WB_END
1095
1096 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1097 oop class_loader_oop = JNIHandles::resolve(class_loader);
1098 ClassLoaderData* cld = class_loader_oop != NULL
1099 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1100 : ClassLoaderData::the_null_class_loader_data();
1101
1102 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1103 WB_END
1104
1105 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1106 if (inc < 0) {
1107 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1108 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1109 }
1110
1111 jlong max_size_t = (jlong) ((size_t) -1);
1112 if (inc > max_size_t) {
1113 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1114 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1115 }
1116
1117 size_t new_cap_until_GC = 0;
1118 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1119 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1120 if (!success) {
1121 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1122 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1123 "due to contention with another thread");
1124 }
1125 return (jlong) new_cap_until_GC;
1126 WB_END
1127
1128 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1129 return (jlong) MetaspaceGC::capacity_until_GC();
1130 WB_END
1131
1132 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1133 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1134 Monitor::_safepoint_check_always :
1135 Monitor::_safepoint_check_never;
1136 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1137 attemptedNoSafepointValue == JNI_TRUE);
1138 WB_END
1139
1140 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1141 oop obj_oop = JNIHandles::resolve(obj);
1142 return (jboolean) obj_oop->mark()->has_monitor();
1143 WB_END
1144
1145 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1146 VM_ForceSafepoint force_safepoint_op;
1147 VMThread::execute(&force_safepoint_op);
1148 WB_END
1149
1150 //Some convenience methods to deal with objects from java
1151 int WhiteBox::offset_for_field(const char* field_name, oop object,
1152 Symbol* signature_symbol) {
1153 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1154 Thread* THREAD = Thread::current();
1155
1156 //Get the class of our object
1157 Klass* arg_klass = object->klass();
1158 //Turn it into an instance-klass
1159 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1160
1161 //Create symbols to look for in the class
1162 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1163 THREAD);
1164
1165 //To be filled in with an offset of the field we're looking for
1166 fieldDescriptor fd;
1167
1168 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1169 if (res == NULL) {
1170 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1171 name_symbol->as_C_string());
1172 fatal("Invalid layout of preloaded class");
1173 }
1174
1175 //fetch the field at the offset we've found
1176 int dest_offset = fd.offset();
1177
1178 return dest_offset;
1179 }
1180
1181
1182 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1183 int offset = offset_for_field(field_name, object,
1184 vmSymbols::string_signature());
1185 oop string = object->obj_field(offset);
1186 if (string == NULL) {
1187 return NULL;
1188 }
1189 const char* ret = java_lang_String::as_utf8_string(string);
1190 return ret;
1191 }
1192
1193 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1194 int offset =
1195 offset_for_field(field_name, object, vmSymbols::bool_signature());
1196 bool ret = (object->bool_field(offset) == JNI_TRUE);
1197 return ret;
1198 }
1199
1200 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1201 ResourceMark rm;
1202 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1203
1204 // one by one registration natives for exception catching
1205 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1206 CHECK_JNI_EXCEPTION(env);
1207 for (int i = 0, n = method_count; i < n; ++i) {
1208 // Skip dummy entries
1209 if (method_array[i].fnPtr == NULL) continue;
1210 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1211 jthrowable throwable_obj = env->ExceptionOccurred();
1212 if (throwable_obj != NULL) {
1213 env->ExceptionClear();
1214 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1215 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1216 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1217 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1218 method_array[i].name, method_array[i].signature);
1219 }
1220 } else {
1221 // Registration failed unexpectedly.
1222 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1223 method_array[i].name, method_array[i].signature);
1224 env->UnregisterNatives(wbclass);
1225 break;
1226 }
1227 }
1228 }
1229 }
1230
1231 #define CC (char*)
1232
1233 static JNINativeMethod methods[] = {
1234 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1235 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1236 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1237 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1238 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1239 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1240 {CC"parseCommandLine",
1241 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1242 (void*) &WB_ParseCommandLine
1243 },
1244 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V",
1245 (void*)&WB_AddToBootstrapClassLoaderSearch},
1246 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V",
1247 (void*)&WB_AddToSystemClassLoaderSearch},
1248 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1249 (void*)&WB_GetCompressedOopsMaxHeapSize},
1250 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1251 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1252 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1253 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1254 #if INCLUDE_ALL_GCS
1255 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1256 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1257 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
1258 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1259 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1260 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1261 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1262 (void*)&WB_G1AuxiliaryMemoryUsage },
1263 #endif // INCLUDE_ALL_GCS
1264 #if INCLUDE_NMT
1265 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1266 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1267 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1268 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1269 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1270 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1271 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1272 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1273 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1274 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1275 #endif // INCLUDE_NMT
1276 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
1277 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1278 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1279 (void*)&WB_DeoptimizeMethod },
1280 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1281 (void*)&WB_IsMethodCompiled },
1282 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1283 (void*)&WB_IsMethodCompilable},
1284 {CC"isMethodQueuedForCompilation",
1285 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1286 {CC"makeMethodNotCompilable",
1287 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1288 {CC"testSetDontInlineMethod",
1289 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1290 {CC"getMethodCompilationLevel",
1291 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1292 {CC"getMethodEntryBci",
1293 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1294 {CC"getCompileQueueSize",
1295 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1296 {CC"testSetForceInlineMethod",
1297 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1298 {CC"enqueueMethodForCompilation",
1299 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1300 {CC"clearMethodState",
1301 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1302 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1303 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1304 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1305 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1306 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1307 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1308 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1309 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1310 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1311 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1312 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1313 (void*)&WB_SetStringVMFlag},
1314 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1315 (void*)&WB_GetBooleanVMFlag},
1316 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1317 (void*)&WB_GetIntxVMFlag},
1318 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1319 (void*)&WB_GetUintxVMFlag},
1320 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1321 (void*)&WB_GetUint64VMFlag},
1322 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1323 (void*)&WB_GetSizeTVMFlag},
1324 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1325 (void*)&WB_GetDoubleVMFlag},
1326 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1327 (void*)&WB_GetStringVMFlag},
1328 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1329 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1330 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1331 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1332 {CC"allocateMetaspace",
1333 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1334 {CC"freeMetaspace",
1335 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1336 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1337 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1338 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1339 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1340 (void*)&WB_GetNMethod },
1341 {CC"forceNMethodSweep0", CC"()Ljava/lang/Thread;", (void*)&WB_ForceNMethodSweep },
1342 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1343 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1344 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1345 {CC"getCompilationActivityMode",
1346 CC"()I", (void*)&WB_GetCompilationActivityMode},
1347 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1348 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1349 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1350 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
1351 {CC"isMonitorInflated", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1352 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1353 };
1354
1355 #undef CC
1356
1357 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1358 {
1359 if (WhiteBoxAPI) {
1360 // Make sure that wbclass is loaded by the null classloader
1361 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1362 Handle loader(ikh->class_loader());
1363 if (loader.is_null()) {
1364 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1365 WhiteBox::register_extended(env, wbclass, thread);
1366 WhiteBox::set_used();
1367 }
1368 }
1369 }
1370 JVM_END