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_G1NumFreeRegions(JNIEnv* env, jobject o))
299 G1CollectedHeap* g1 = G1CollectedHeap::heap();
300 size_t nr = g1->num_free_regions();
301 return (jlong)nr;
302 WB_END
303
304 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
305 G1CollectedHeap* g1 = G1CollectedHeap::heap();
306 return g1->concurrent_mark()->cmThread()->during_cycle();
307 WB_END
308
309 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
310 G1CollectedHeap* g1h = G1CollectedHeap::heap();
311 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
312 g1h->collect(GCCause::_wb_conc_mark);
313 return true;
314 }
315 return false;
316 WB_END
317
318 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
319 return (jint)HeapRegion::GrainBytes;
320 WB_END
321 #endif // INCLUDE_ALL_GCS
322
323 #if INCLUDE_NMT
324 // Alloc memory using the test memory type so that we can use that to see if
325 // NMT picks it up correctly
326 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
327 jlong addr = 0;
328 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
329 return addr;
330 WB_END
331
332 // Alloc memory with pseudo call stack. The test can create psudo malloc
333 // allocation site to stress the malloc tracking.
334 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
335 address pc = (address)(size_t)pseudo_stack;
336 NativeCallStack stack(&pc, 1);
337 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
338 WB_END
339
340 // Free the memory allocated by NMTAllocTest
341 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
342 os::free((void*)(uintptr_t)mem);
343 WB_END
344
345 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
346 jlong addr = 0;
347
348 addr = (jlong)(uintptr_t)os::reserve_memory(size);
349 MemTracker::record_virtual_memory_type((address)addr, mtTest);
350
351 return addr;
352 WB_END
353
354 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
355 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
356 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
357 WB_END
358
359 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
360 os::uncommit_memory((char *)(uintptr_t)addr, size);
361 WB_END
362
363 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
364 os::release_memory((char *)(uintptr_t)addr, size);
365 WB_END
366
367 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
368 return MemTracker::tracking_level() == NMT_detail;
369 WB_END
370
371 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
372 // Test that we can downgrade NMT levels but not upgrade them.
373 if (MemTracker::tracking_level() == NMT_off) {
374 MemTracker::transition_to(NMT_off);
375 return MemTracker::tracking_level() == NMT_off;
376 } else {
377 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
378 MemTracker::transition_to(NMT_summary);
379 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
380
381 // Can't go to detail once NMT is set to summary.
382 MemTracker::transition_to(NMT_detail);
383 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
384
385 // Shutdown sets tracking level to minimal.
386 MemTracker::shutdown();
387 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
388
389 // Once the tracking level is minimal, we cannot increase to summary.
390 // The code ignores this request instead of asserting because if the malloc site
391 // table overflows in another thread, it tries to change the code to summary.
392 MemTracker::transition_to(NMT_summary);
393 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
394
395 // Really can never go up to detail, verify that the code would never do this.
396 MemTracker::transition_to(NMT_detail);
397 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
398 return MemTracker::tracking_level() == NMT_minimal;
399 }
400 WB_END
401
402 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
403 int hash_size = MallocSiteTable::hash_buckets();
404 assert(hash_size > 0, "NMT hash_size should be > 0");
405 return (jint)hash_size;
406 WB_END
407 #endif // INCLUDE_NMT
408
409 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
410 assert(method != NULL, "method should not be null");
411 ThreadToNativeFromVM ttn(thread);
412 return env->FromReflectedMethod(method);
413 }
414
415 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
416 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
417 private:
418 int _result;
419 const bool _make_not_entrant;
420 public:
421 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
422 _result(0), _make_not_entrant(make_not_entrant) { }
423 int result() const { return _result; }
424
425 void doit() {
426 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
427 if (t->has_last_Java_frame()) {
428 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
429 frame* f = fst.current();
430 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
431 RegisterMap* reg_map = fst.register_map();
432 Deoptimization::deoptimize(t, *f, reg_map);
433 if (_make_not_entrant) {
434 nmethod* nm = CodeCache::find_nmethod(f->pc());
435 assert(nm != NULL, "sanity check");
436 nm->make_not_entrant();
437 }
438 ++_result;
439 }
440 }
441 }
442 }
443 }
444 };
445
446 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
447 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
448 VMThread::execute(&op);
449 return op.result();
450 WB_END
451
452 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
453 MutexLockerEx mu(Compile_lock);
454 CodeCache::mark_all_nmethods_for_deoptimization();
455 VM_Deoptimize op;
456 VMThread::execute(&op);
457 WB_END
458
459 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
460 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
461 int result = 0;
462 CHECK_JNI_EXCEPTION_(env, result);
463 MutexLockerEx mu(Compile_lock);
464 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
465 if (is_osr) {
466 result += mh->mark_osr_nmethods();
467 } else if (mh->code() != NULL) {
468 mh->code()->mark_for_deoptimization();
469 ++result;
470 }
471 result += CodeCache::mark_for_deoptimization(mh());
472 if (result > 0) {
473 VM_Deoptimize op;
474 VMThread::execute(&op);
475 }
476 return result;
477 WB_END
478
479 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
480 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
481 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
482 MutexLockerEx mu(Compile_lock);
483 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
484 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
485 if (code == NULL) {
486 return JNI_FALSE;
487 }
488 return (code->is_alive() && !code->is_marked_for_deoptimization());
489 WB_END
490
491 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
492 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
493 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
494 MutexLockerEx mu(Compile_lock);
495 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
496 if (is_osr) {
497 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
498 } else {
499 return CompilationPolicy::can_be_compiled(mh, comp_level);
500 }
501 WB_END
502
503 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
504 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
505 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
506 MutexLockerEx mu(Compile_lock);
507 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
508 return mh->queued_for_compilation();
509 WB_END
510
511 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
512 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
513 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
514 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
515 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
516 return (code != NULL ? code->comp_level() : CompLevel_none);
517 WB_END
518
519 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
520 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
521 CHECK_JNI_EXCEPTION(env);
522 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
523 if (is_osr) {
524 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
525 } else {
526 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
527 }
528 WB_END
529
530 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
531 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
532 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
533 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
534 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
535 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
536 WB_END
537
538 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
539 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
540 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
541 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
542 bool result = mh->dont_inline();
543 mh->set_dont_inline(value == JNI_TRUE);
544 return result;
545 WB_END
546
547 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
548 if (comp_level == CompLevel_any) {
549 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
550 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
551 } else {
552 return CompileBroker::queue_size(comp_level);
553 }
554 WB_END
555
556 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
557 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
558 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
559 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
560 bool result = mh->force_inline();
561 mh->set_force_inline(value == JNI_TRUE);
562 return result;
563 WB_END
564
565 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
566 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
567 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
568 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
569 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
570 MutexLockerEx mu(Compile_lock);
571 return (mh->queued_for_compilation() || nm != NULL);
572 WB_END
573
574 class AlwaysFalseClosure : public BoolObjectClosure {
575 public:
576 bool do_object_b(oop p) { return false; }
577 };
578
579 static AlwaysFalseClosure always_false;
580
581 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
582 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
583 CHECK_JNI_EXCEPTION(env);
584 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
585 MutexLockerEx mu(Compile_lock);
586 MethodData* mdo = mh->method_data();
587 MethodCounters* mcs = mh->method_counters();
588
589 if (mdo != NULL) {
590 mdo->init();
591 ResourceMark rm;
592 int arg_count = mdo->method()->size_of_parameters();
593 for (int i = 0; i < arg_count; i++) {
594 mdo->set_arg_modified(i, 0);
595 }
596 MutexLockerEx mu(mdo->extra_data_lock());
597 mdo->clean_method_data(&always_false);
598 }
599
600 mh->clear_not_c1_compilable();
601 mh->clear_not_c2_compilable();
602 mh->clear_not_c2_osr_compilable();
603 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
604 if (mcs != NULL) {
605 mcs->backedge_counter()->init();
606 mcs->invocation_counter()->init();
607 mcs->set_interpreter_invocation_count(0);
608 mcs->set_interpreter_throwout_count(0);
609
610 #ifdef TIERED
611 mcs->set_rate(0.0F);
612 mh->set_prev_event_count(0);
613 mh->set_prev_time(0);
614 #endif
615 }
616 WB_END
617
618 template <typename T>
619 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
620 if (name == NULL) {
621 return false;
622 }
623 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
624 const char* flag_name = env->GetStringUTFChars(name, NULL);
625 bool result = (*TAt)(flag_name, value, true, true);
626 env->ReleaseStringUTFChars(name, flag_name);
627 return result;
628 }
629
630 template <typename T>
631 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
632 if (name == NULL) {
633 return false;
634 }
635 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
636 const char* flag_name = env->GetStringUTFChars(name, NULL);
637 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
638 env->ReleaseStringUTFChars(name, flag_name);
639 return result;
640 }
641
642 template <typename T>
643 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
644 ResourceMark rm(thread);
645 jclass clazz = env->FindClass(name->as_C_string());
646 CHECK_JNI_EXCEPTION_(env, NULL);
647 jmethodID methodID = env->GetStaticMethodID(clazz,
648 vmSymbols::valueOf_name()->as_C_string(),
649 sig->as_C_string());
650 CHECK_JNI_EXCEPTION_(env, NULL);
651 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
652 CHECK_JNI_EXCEPTION_(env, NULL);
653 return result;
654 }
655
656 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
657 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
658 }
659 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
660 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
661 }
662 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
663 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
664 }
665 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
666 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
667 }*/
668 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
669 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
670 }
671
672 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
673 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
674 const char* flag_name = env->GetStringUTFChars(name, NULL);
675 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
676 env->ReleaseStringUTFChars(name, flag_name);
677 return result;
678 }
679
680 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
681 Flag* flag = getVMFlag(thread, env, name);
682 return (flag != NULL) && flag->is_constant_in_binary();
683 WB_END
684
685 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
686 Flag* flag = getVMFlag(thread, env, name);
687 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
688 WB_END
689
690 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
691 bool result;
692 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
693 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
694 return booleanBox(thread, env, result);
695 }
696 return NULL;
697 WB_END
698
699 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
700 intx result;
701 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
702 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
703 return longBox(thread, env, result);
704 }
705 return NULL;
706 WB_END
707
708 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
709 uintx result;
710 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
711 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
712 return longBox(thread, env, result);
713 }
714 return NULL;
715 WB_END
716
717 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
718 uint64_t result;
719 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
720 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
721 return longBox(thread, env, result);
722 }
723 return NULL;
724 WB_END
725
726 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
727 uintx result;
728 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
729 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
730 return longBox(thread, env, result);
731 }
732 return NULL;
733 WB_END
734
735 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
736 double result;
737 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
738 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
739 return doubleBox(thread, env, result);
740 }
741 return NULL;
742 WB_END
743
744 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
745 ccstr ccstrResult;
746 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
747 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
748 jstring result = env->NewStringUTF(ccstrResult);
749 CHECK_JNI_EXCEPTION_(env, NULL);
750 return result;
751 }
752 return NULL;
753 WB_END
754
755 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
756 bool result = value == JNI_TRUE ? true : false;
757 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
758 WB_END
759
760 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
761 intx result = value;
762 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
763 WB_END
764
765 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
766 uintx result = value;
767 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
768 WB_END
769
770 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
771 uint64_t result = value;
772 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
773 WB_END
774
775 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
776 size_t result = value;
777 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
778 WB_END
779
780 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
781 double result = value;
782 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
783 WB_END
784
785 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
786 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
787 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
788 ccstr ccstrResult = ccstrValue;
789 bool needFree;
790 {
791 ThreadInVMfromNative ttvfn(thread); // back to VM
792 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
793 }
794 if (value != NULL) {
795 env->ReleaseStringUTFChars(value, ccstrValue);
796 }
797 if (needFree) {
798 FREE_C_HEAP_ARRAY(char, ccstrResult);
799 }
800 WB_END
801
802 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
803 WhiteBox::compilation_locked = true;
804 WB_END
805
806 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
807 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
808 WhiteBox::compilation_locked = false;
809 mo.notify_all();
810 WB_END
811
812 void WhiteBox::sweeper_thread_entry(JavaThread* thread, TRAPS) {
813 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
814 {
815 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
816 NMethodSweeper::_should_sweep = true;
817 }
818 NMethodSweeper::possibly_sweep();
819 }
820
821 JavaThread* WhiteBox::create_sweeper_thread(TRAPS) {
822 // create sweeper thread w/ custom entry -- one iteration instead of loop
823 CodeCacheSweeperThread* sweeper_thread = new CodeCacheSweeperThread();
824 sweeper_thread->set_entry_point(&WhiteBox::sweeper_thread_entry);
825
826 // create j.l.Thread object and associate it w/ sweeper thread
827 {
828 // inherit deamon property from current thread
829 bool is_daemon = java_lang_Thread::is_daemon(JavaThread::current()->threadObj());
830
831 HandleMark hm(THREAD);
832 Handle thread_group(THREAD, Universe::system_thread_group());
833 const char* name = "WB Sweeper thread";
834 sweeper_thread->allocate_threadObj(thread_group, name, is_daemon, THREAD);
835 }
836
837 {
838 MutexLocker mu(Threads_lock, THREAD);
839 Threads::add(sweeper_thread);
840 }
841 return sweeper_thread;
842 }
843
844 WB_ENTRY(jobject, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
845 JavaThread* sweeper_thread = WhiteBox::create_sweeper_thread(Thread::current());
846 if (sweeper_thread == NULL) {
847 return NULL;
848 }
849 jobject result = JNIHandles::make_local(env, sweeper_thread->threadObj());
850 Thread::start(sweeper_thread);
851 return result;
852 WB_END
853
854 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
855 ResourceMark rm(THREAD);
856 int len;
857 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
858 return (StringTable::lookup(name, len) != NULL);
859 WB_END
860
861 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
862 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
863 Universe::heap()->collect(GCCause::_last_ditch_collection);
864 #if INCLUDE_ALL_GCS
865 if (UseG1GC) {
866 // Needs to be cleared explicitly for G1
867 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
868 }
869 #endif // INCLUDE_ALL_GCS
870 WB_END
871
872 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
873 Universe::heap()->collect(GCCause::_wb_young_gc);
874 WB_END
875
876 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
877 // static+volatile in order to force the read to happen
878 // (not be eliminated by the compiler)
879 static char c;
880 static volatile char* p;
881
882 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
883 if (p == NULL) {
884 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
885 }
886
887 c = *p;
888 WB_END
889
890 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
891 const char* cpu_features = VM_Version::cpu_features();
892 ThreadToNativeFromVM ttn(thread);
893 jstring features_string = env->NewStringUTF(cpu_features);
894
895 CHECK_JNI_EXCEPTION_(env, NULL);
896
897 return features_string;
898 WB_END
899
900 int WhiteBox::get_blob_type(const CodeBlob* code) {
901 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
902 return CodeCache::get_code_heap(code)->code_blob_type();
903 }
904
905 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
906 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
907 return CodeCache::get_code_heap(blob_type);
908 }
909
910 struct CodeBlobStub {
911 CodeBlobStub(const CodeBlob* blob) :
912 name(os::strdup(blob->name())),
913 size(blob->size()),
914 blob_type(WhiteBox::get_blob_type(blob)) { }
915 ~CodeBlobStub() { os::free((void*) name); }
916 const char* const name;
917 const int size;
918 const int blob_type;
919 };
920
921 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
922 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
923 CHECK_JNI_EXCEPTION_(env, NULL);
924 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
925
926 jstring name = env->NewStringUTF(cb->name);
927 CHECK_JNI_EXCEPTION_(env, NULL);
928 env->SetObjectArrayElement(result, 0, name);
929
930 jobject obj = integerBox(thread, env, cb->size);
931 CHECK_JNI_EXCEPTION_(env, NULL);
932 env->SetObjectArrayElement(result, 1, obj);
933
934 obj = integerBox(thread, env, cb->blob_type);
935 CHECK_JNI_EXCEPTION_(env, NULL);
936 env->SetObjectArrayElement(result, 2, obj);
937
938 return result;
939 }
940
941 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
942 ResourceMark rm(THREAD);
943 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
944 CHECK_JNI_EXCEPTION_(env, NULL);
945 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
946 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
947 jobjectArray result = NULL;
948 if (code == NULL) {
949 return result;
950 }
951 int insts_size = code->insts_size();
952
953 ThreadToNativeFromVM ttn(thread);
954 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
955 CHECK_JNI_EXCEPTION_(env, NULL);
956 result = env->NewObjectArray(4, clazz, NULL);
957 if (result == NULL) {
958 return result;
959 }
960
961 CodeBlobStub stub(code);
962 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
963 env->SetObjectArrayElement(result, 0, codeBlob);
964
965 jobject level = integerBox(thread, env, code->comp_level());
966 CHECK_JNI_EXCEPTION_(env, NULL);
967 env->SetObjectArrayElement(result, 1, level);
968
969 jbyteArray insts = env->NewByteArray(insts_size);
970 CHECK_JNI_EXCEPTION_(env, NULL);
971 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
972 env->SetObjectArrayElement(result, 2, insts);
973
974 jobject id = integerBox(thread, env, code->compile_id());
975 CHECK_JNI_EXCEPTION_(env, NULL);
976 env->SetObjectArrayElement(result, 3, id);
977
978 return result;
979 WB_END
980
981 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
982 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
983 BufferBlob* blob;
984 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
985 if (full_size < size) {
986 full_size += round_to(size - full_size, oopSize);
987 }
988 {
989 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
990 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
991 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
992 }
993 // Track memory usage statistic after releasing CodeCache_lock
994 MemoryService::track_code_cache_memory_usage();
995 return blob;
996 }
997
998 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
999 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1000 WB_END
1001
1002 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1003 BufferBlob::free((BufferBlob*) addr);
1004 WB_END
1005
1006 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1007 ResourceMark rm;
1008 GrowableArray<CodeBlobStub*> blobs;
1009 {
1010 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1011 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1012 if (heap == NULL) {
1013 return NULL;
1014 }
1015 for (CodeBlob* cb = (CodeBlob*) heap->first();
1016 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1017 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1018 new (stub) CodeBlobStub(cb);
1019 blobs.append(stub);
1020 }
1021 }
1022 if (blobs.length() == 0) {
1023 return NULL;
1024 }
1025 ThreadToNativeFromVM ttn(thread);
1026 jobjectArray result = NULL;
1027 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1028 CHECK_JNI_EXCEPTION_(env, NULL);
1029 result = env->NewObjectArray(blobs.length(), clazz, NULL);
1030 if (result == NULL) {
1031 return result;
1032 }
1033 int i = 0;
1034 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1035 it != blobs.end(); ++it) {
1036 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1037 env->SetObjectArrayElement(result, i, obj);
1038 ++i;
1039 }
1040 return result;
1041 WB_END
1042
1043 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1044 return CompileBroker::get_compilation_activity_mode();
1045 WB_END
1046
1047 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1048 ThreadToNativeFromVM ttn(thread);
1049 CodeBlobStub stub((CodeBlob*) addr);
1050 return codeBlob2objectArray(thread, env, &stub);
1051 WB_END
1052
1053 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1054 return (jlong) Thread::current()->stack_size();
1055 WB_END
1056
1057 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1058 JavaThread* t = JavaThread::current();
1059 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
1060 WB_END
1061
1062 int WhiteBox::array_bytes_to_length(size_t bytes) {
1063 return Array<u1>::bytes_to_length(bytes);
1064 }
1065
1066 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1067 if (size < 0) {
1068 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1069 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1070 }
1071
1072 oop class_loader_oop = JNIHandles::resolve(class_loader);
1073 ClassLoaderData* cld = class_loader_oop != NULL
1074 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1075 : ClassLoaderData::the_null_class_loader_data();
1076
1077 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1078
1079 return (jlong)(uintptr_t)metadata;
1080 WB_END
1081
1082 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1083 oop class_loader_oop = JNIHandles::resolve(class_loader);
1084 ClassLoaderData* cld = class_loader_oop != NULL
1085 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1086 : ClassLoaderData::the_null_class_loader_data();
1087
1088 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1089 WB_END
1090
1091 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1092 if (inc < 0) {
1093 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1094 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1095 }
1096
1097 jlong max_size_t = (jlong) ((size_t) -1);
1098 if (inc > max_size_t) {
1099 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1100 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1101 }
1102
1103 size_t new_cap_until_GC = 0;
1104 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1105 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1106 if (!success) {
1107 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1108 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1109 "due to contention with another thread");
1110 }
1111 return (jlong) new_cap_until_GC;
1112 WB_END
1113
1114 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1115 return (jlong) MetaspaceGC::capacity_until_GC();
1116 WB_END
1117
1118 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1119 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1120 Monitor::_safepoint_check_always :
1121 Monitor::_safepoint_check_never;
1122 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1123 attemptedNoSafepointValue == JNI_TRUE);
1124 WB_END
1125
1126 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1127 oop obj_oop = JNIHandles::resolve(obj);
1128 return (jboolean) obj_oop->mark()->has_monitor();
1129 WB_END
1130
1131 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1132 VM_ForceSafepoint force_safepoint_op;
1133 VMThread::execute(&force_safepoint_op);
1134 WB_END
1135
1136 //Some convenience methods to deal with objects from java
1137 int WhiteBox::offset_for_field(const char* field_name, oop object,
1138 Symbol* signature_symbol) {
1139 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1140 Thread* THREAD = Thread::current();
1141
1142 //Get the class of our object
1143 Klass* arg_klass = object->klass();
1144 //Turn it into an instance-klass
1145 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1146
1147 //Create symbols to look for in the class
1148 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1149 THREAD);
1150
1151 //To be filled in with an offset of the field we're looking for
1152 fieldDescriptor fd;
1153
1154 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1155 if (res == NULL) {
1156 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1157 name_symbol->as_C_string());
1158 fatal("Invalid layout of preloaded class");
1159 }
1160
1161 //fetch the field at the offset we've found
1162 int dest_offset = fd.offset();
1163
1164 return dest_offset;
1165 }
1166
1167
1168 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1169 int offset = offset_for_field(field_name, object,
1170 vmSymbols::string_signature());
1171 oop string = object->obj_field(offset);
1172 if (string == NULL) {
1173 return NULL;
1174 }
1175 const char* ret = java_lang_String::as_utf8_string(string);
1176 return ret;
1177 }
1178
1179 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1180 int offset =
1181 offset_for_field(field_name, object, vmSymbols::bool_signature());
1182 bool ret = (object->bool_field(offset) == JNI_TRUE);
1183 return ret;
1184 }
1185
1186 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1187 ResourceMark rm;
1188 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1189
1190 // one by one registration natives for exception catching
1191 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1192 CHECK_JNI_EXCEPTION(env);
1193 for (int i = 0, n = method_count; i < n; ++i) {
1194 // Skip dummy entries
1195 if (method_array[i].fnPtr == NULL) continue;
1196 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1197 jthrowable throwable_obj = env->ExceptionOccurred();
1198 if (throwable_obj != NULL) {
1199 env->ExceptionClear();
1200 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1201 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1202 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1203 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1204 method_array[i].name, method_array[i].signature);
1205 }
1206 } else {
1207 // Registration failed unexpectedly.
1208 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1209 method_array[i].name, method_array[i].signature);
1210 env->UnregisterNatives(wbclass);
1211 break;
1212 }
1213 }
1214 }
1215 }
1216
1217 #define CC (char*)
1218
1219 static JNINativeMethod methods[] = {
1220 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1221 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1222 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1223 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1224 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1225 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1226 {CC"parseCommandLine",
1227 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1228 (void*) &WB_ParseCommandLine
1229 },
1230 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V",
1231 (void*)&WB_AddToBootstrapClassLoaderSearch},
1232 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V",
1233 (void*)&WB_AddToSystemClassLoaderSearch},
1234 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1235 (void*)&WB_GetCompressedOopsMaxHeapSize},
1236 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1237 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1238 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1239 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1240 #if INCLUDE_ALL_GCS
1241 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1242 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1243 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1244 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1245 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1246 #endif // INCLUDE_ALL_GCS
1247 #if INCLUDE_NMT
1248 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1249 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1250 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1251 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1252 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1253 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1254 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1255 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1256 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1257 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1258 #endif // INCLUDE_NMT
1259 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
1260 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1261 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1262 (void*)&WB_DeoptimizeMethod },
1263 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1264 (void*)&WB_IsMethodCompiled },
1265 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1266 (void*)&WB_IsMethodCompilable},
1267 {CC"isMethodQueuedForCompilation",
1268 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1269 {CC"makeMethodNotCompilable",
1270 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1271 {CC"testSetDontInlineMethod",
1272 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1273 {CC"getMethodCompilationLevel",
1274 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1275 {CC"getMethodEntryBci",
1276 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1277 {CC"getCompileQueueSize",
1278 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1279 {CC"testSetForceInlineMethod",
1280 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1281 {CC"enqueueMethodForCompilation",
1282 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1283 {CC"clearMethodState",
1284 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1285 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1286 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1287 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1288 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1289 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1290 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1291 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1292 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1293 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1294 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1295 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1296 (void*)&WB_SetStringVMFlag},
1297 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1298 (void*)&WB_GetBooleanVMFlag},
1299 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1300 (void*)&WB_GetIntxVMFlag},
1301 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1302 (void*)&WB_GetUintxVMFlag},
1303 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1304 (void*)&WB_GetUint64VMFlag},
1305 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1306 (void*)&WB_GetSizeTVMFlag},
1307 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1308 (void*)&WB_GetDoubleVMFlag},
1309 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1310 (void*)&WB_GetStringVMFlag},
1311 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1312 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1313 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1314 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1315 {CC"allocateMetaspace",
1316 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1317 {CC"freeMetaspace",
1318 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1319 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1320 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1321 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1322 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1323 (void*)&WB_GetNMethod },
1324 {CC"forceNMethodSweep0", CC"()Ljava/lang/Thread;", (void*)&WB_ForceNMethodSweep },
1325 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1326 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1327 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1328 {CC"getCompilationActivityMode",
1329 CC"()I", (void*)&WB_GetCompilationActivityMode},
1330 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1331 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1332 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1333 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
1334 {CC"isMonitorInflated", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1335 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1336 };
1337
1338 #undef CC
1339
1340 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1341 {
1342 if (WhiteBoxAPI) {
1343 // Make sure that wbclass is loaded by the null classloader
1344 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1345 Handle loader(ikh->class_loader());
1346 if (loader.is_null()) {
1347 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1348 WhiteBox::register_extended(env, wbclass, thread);
1349 WhiteBox::set_used();
1350 }
1351 }
1352 }
1353 JVM_END