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/metaspaceShared.hpp"
35 #include "memory/universe.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/wbtestmethods/parserTests.hpp"
38 #include "prims/whitebox.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/compilationPolicy.hpp"
41 #include "runtime/deoptimization.hpp"
42 #include "runtime/interfaceSupport.hpp"
43 #include "runtime/javaCalls.hpp"
44 #include "runtime/os.hpp"
45 #include "runtime/sweeper.hpp"
46 #include "runtime/thread.hpp"
47 #include "runtime/vm_version.hpp"
48 #include "utilities/array.hpp"
49 #include "utilities/debug.hpp"
50 #include "utilities/exceptions.hpp"
51 #include "utilities/macros.hpp"
52 #if INCLUDE_ALL_GCS
53 #include "gc/g1/concurrentMark.hpp"
54 #include "gc/g1/concurrentMarkThread.hpp"
55 #include "gc/g1/g1CollectedHeap.inline.hpp"
56 #include "gc/g1/heapRegionRemSet.hpp"
57 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
58 #endif // INCLUDE_ALL_GCS
59 #if INCLUDE_NMT
60 #include "services/mallocSiteTable.hpp"
61 #include "services/memTracker.hpp"
62 #include "utilities/nativeCallStack.hpp"
63 #endif // INCLUDE_NMT
64
65
66 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
67
68 #define SIZE_T_MAX_VALUE ((size_t) -1)
69
70 bool WhiteBox::_used = false;
71 volatile bool WhiteBox::compilation_locked = false;
72
73 class VM_WhiteBoxOperation : public VM_Operation {
74 public:
75 VM_WhiteBoxOperation() { }
76 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
77 bool allow_nested_vm_operations() const { return true; }
78 };
79
80
81 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
82 return (jlong)(void*)JNIHandles::resolve(obj);
83 WB_END
84
85 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
86 return heapOopSize;
87 WB_END
88
89 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
90 return os::vm_page_size();
91 WB_END
92
93 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
94 return os::large_page_size();
95 WB_END
96
97 class WBIsKlassAliveClosure : public KlassClosure {
98 Symbol* _name;
99 bool _found;
100 public:
101 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
102
103 void do_klass(Klass* k) {
104 if (_found) return;
105 Symbol* ksym = k->name();
106 if (ksym->fast_compare(_name) == 0) {
107 _found = true;
108 }
109 }
110
111 bool found() const {
112 return _found;
113 }
114 };
115
116 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
117 Handle h_name = JNIHandles::resolve(name);
118 if (h_name.is_null()) return false;
119 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
120 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
121
122 WBIsKlassAliveClosure closure(sym);
123 ClassLoaderDataGraph::classes_do(&closure);
124
125 return closure.found();
126 WB_END
127
128 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
129 #if INCLUDE_JVMTI
130 ResourceMark rm;
131 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
132 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
133 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
134 assert(err == JVMTI_ERROR_NONE, "must not fail");
135 #endif
136 }
137 WB_END
138
139 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
140 #if INCLUDE_JVMTI
141 ResourceMark rm;
142 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
143 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
144 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
145 assert(err == JVMTI_ERROR_NONE, "must not fail");
146 #endif
147 }
148 WB_END
149
150
151 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
152 return (jlong)Arguments::max_heap_for_compressed_oops();
153 }
154 WB_END
155
156 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
157 CollectorPolicy * p = Universe::heap()->collector_policy();
158 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
159 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
160 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
161 p->space_alignment(), p->heap_alignment());
162 }
163 WB_END
164
165 #ifndef PRODUCT
166 // Forward declaration
167 void TestReservedSpace_test();
168 void TestReserveMemorySpecial_test();
169 void TestVirtualSpace_test();
170 void TestMetaspaceAux_test();
171 #endif
172
173 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
174 #ifndef PRODUCT
175 TestReservedSpace_test();
176 TestReserveMemorySpecial_test();
177 TestVirtualSpace_test();
178 TestMetaspaceAux_test();
179 #endif
180 WB_END
181
182 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
183 size_t granularity = os::vm_allocation_granularity();
184 ReservedHeapSpace rhs(100 * granularity, granularity, false);
185 VirtualSpace vs;
186 vs.initialize(rhs, 50 * granularity);
187
188 // Check if constraints are complied
189 if (!( UseCompressedOops && rhs.base() != NULL &&
190 Universe::narrow_oop_base() != NULL &&
191 Universe::narrow_oop_use_implicit_null_checks() )) {
192 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
193 "\tUseCompressedOops is %d\n"
194 "\trhs.base() is "PTR_FORMAT"\n"
195 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
196 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
197 UseCompressedOops,
198 rhs.base(),
199 Universe::narrow_oop_base(),
200 Universe::narrow_oop_use_implicit_null_checks());
201 return;
202 }
203 tty->print_cr("Reading from no access area... ");
204 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
205 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
206 WB_END
207
208 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
209 size_t magnitude, size_t iterations) {
210 size_t granularity = os::vm_allocation_granularity();
211 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
212 VirtualSpace vs;
213 if (!vs.initialize(rhs, 0)) {
214 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
215 return 3;
216 }
217
218 long seed = os::random();
219 tty->print_cr("Random seed is %ld", seed);
220 os::init_random(seed);
221
222 for (size_t i = 0; i < iterations; i++) {
223
224 // Whether we will shrink or grow
225 bool shrink = os::random() % 2L == 0;
226
227 // Get random delta to resize virtual space
228 size_t delta = (size_t)os::random() % magnitude;
229
230 // If we are about to shrink virtual space below zero, then expand instead
231 if (shrink && vs.committed_size() < delta) {
232 shrink = false;
233 }
234
235 // Resizing by delta
236 if (shrink) {
237 vs.shrink_by(delta);
238 } else {
239 // If expanding fails expand_by will silently return false
240 vs.expand_by(delta, true);
241 }
242 }
243 return 0;
244 }
245
246 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
247 jlong reserved_space_size, jlong magnitude, jlong iterations))
248 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
249 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
250 iterations);
251 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
252 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
253 return 1;
254 }
255
256 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
257 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
258 if (sizeof(size_t) < sizeof(jlong)) {
259 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
260 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
261 || iterations > size_t_max_value) {
262 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
263 return 2;
264 }
265 }
266
267 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
268 (size_t) magnitude, (size_t) iterations);
269 WB_END
270
271 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
272 oop p = JNIHandles::resolve(obj);
273 #if INCLUDE_ALL_GCS
274 if (UseG1GC) {
275 G1CollectedHeap* g1 = G1CollectedHeap::heap();
276 const HeapRegion* hr = g1->heap_region_containing(p);
277 if (hr == NULL) {
278 return false;
279 }
280 return !(hr->is_young());
281 } else if (UseParallelGC) {
282 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
283 return !psh->is_in_young(p);
284 }
285 #endif // INCLUDE_ALL_GCS
286 GenCollectedHeap* gch = GenCollectedHeap::heap();
287 return !gch->is_in_young(p);
288 WB_END
289
290 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
291 oop p = JNIHandles::resolve(obj);
292 return p->size() * HeapWordSize;
293 WB_END
294
295 #if INCLUDE_ALL_GCS
296 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
297 G1CollectedHeap* g1 = G1CollectedHeap::heap();
298 oop result = JNIHandles::resolve(obj);
299 const HeapRegion* hr = g1->heap_region_containing(result);
300 return hr->is_humongous();
301 WB_END
302
303 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
304 G1CollectedHeap* g1 = G1CollectedHeap::heap();
305 size_t nr = g1->max_regions();
306 return (jlong)nr;
307 WB_END
308
309 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
310 G1CollectedHeap* g1 = G1CollectedHeap::heap();
311 size_t nr = g1->num_free_regions();
312 return (jlong)nr;
313 WB_END
314
315 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
316 G1CollectedHeap* g1 = G1CollectedHeap::heap();
317 return g1->concurrent_mark()->cmThread()->during_cycle();
318 WB_END
319
320 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
321 G1CollectedHeap* g1h = G1CollectedHeap::heap();
322 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
323 g1h->collect(GCCause::_wb_conc_mark);
324 return true;
325 }
326 return false;
327 WB_END
328
329 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
330 return (jint)HeapRegion::GrainBytes;
331 WB_END
332
333 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
334 ResourceMark rm(THREAD);
335 G1CollectedHeap* g1h = G1CollectedHeap::heap();
336 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
337 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
338 return JNIHandles::make_local(env, h());
339 WB_END
340 #endif // INCLUDE_ALL_GCS
341
342 #if INCLUDE_NMT
343 // Alloc memory using the test memory type so that we can use that to see if
344 // NMT picks it up correctly
345 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
346 jlong addr = 0;
347 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
348 return addr;
349 WB_END
350
351 // Alloc memory with pseudo call stack. The test can create psudo malloc
352 // allocation site to stress the malloc tracking.
353 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
354 address pc = (address)(size_t)pseudo_stack;
355 NativeCallStack stack(&pc, 1);
356 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
357 WB_END
358
359 // Free the memory allocated by NMTAllocTest
360 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
361 os::free((void*)(uintptr_t)mem);
362 WB_END
363
364 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
365 jlong addr = 0;
366
367 addr = (jlong)(uintptr_t)os::reserve_memory(size);
368 MemTracker::record_virtual_memory_type((address)addr, mtTest);
369
370 return addr;
371 WB_END
372
373 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
374 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
375 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
376 WB_END
377
378 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
379 os::uncommit_memory((char *)(uintptr_t)addr, size);
380 WB_END
381
382 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
383 os::release_memory((char *)(uintptr_t)addr, size);
384 WB_END
385
386 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
387 // Test that we can downgrade NMT levels but not upgrade them.
388 if (MemTracker::tracking_level() == NMT_off) {
389 MemTracker::transition_to(NMT_off);
390 return MemTracker::tracking_level() == NMT_off;
391 } else {
392 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
393 MemTracker::transition_to(NMT_summary);
394 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
395
396 // Can't go to detail once NMT is set to summary.
397 MemTracker::transition_to(NMT_detail);
398 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
399
400 // Shutdown sets tracking level to minimal.
401 MemTracker::shutdown();
402 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
403
404 // Once the tracking level is minimal, we cannot increase to summary.
405 // The code ignores this request instead of asserting because if the malloc site
406 // table overflows in another thread, it tries to change the code to summary.
407 MemTracker::transition_to(NMT_summary);
408 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
409
410 // Really can never go up to detail, verify that the code would never do this.
411 MemTracker::transition_to(NMT_detail);
412 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
413 return MemTracker::tracking_level() == NMT_minimal;
414 }
415 WB_END
416
417 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
418 int hash_size = MallocSiteTable::hash_buckets();
419 assert(hash_size > 0, "NMT hash_size should be > 0");
420 return (jint)hash_size;
421 WB_END
422 #endif // INCLUDE_NMT
423
424 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
425 assert(method != NULL, "method should not be null");
426 ThreadToNativeFromVM ttn(thread);
427 return env->FromReflectedMethod(method);
428 }
429
430 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
431 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
432 private:
433 int _result;
434 const bool _make_not_entrant;
435 public:
436 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
437 _result(0), _make_not_entrant(make_not_entrant) { }
438 int result() const { return _result; }
439
440 void doit() {
441 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
442 if (t->has_last_Java_frame()) {
443 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
444 frame* f = fst.current();
445 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
446 RegisterMap* reg_map = fst.register_map();
447 Deoptimization::deoptimize(t, *f, reg_map);
448 if (_make_not_entrant) {
449 nmethod* nm = CodeCache::find_nmethod(f->pc());
450 assert(nm != NULL, "sanity check");
451 nm->make_not_entrant();
452 }
453 ++_result;
454 }
455 }
456 }
457 }
458 }
459 };
460
461 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
462 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
463 VMThread::execute(&op);
464 return op.result();
465 WB_END
466
467 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
468 MutexLockerEx mu(Compile_lock);
469 CodeCache::mark_all_nmethods_for_deoptimization();
470 VM_Deoptimize op;
471 VMThread::execute(&op);
472 WB_END
473
474 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
475 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
476 int result = 0;
477 CHECK_JNI_EXCEPTION_(env, result);
478 MutexLockerEx mu(Compile_lock);
479 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
480 if (is_osr) {
481 result += mh->mark_osr_nmethods();
482 } else if (mh->code() != NULL) {
483 mh->code()->mark_for_deoptimization();
484 ++result;
485 }
486 result += CodeCache::mark_for_deoptimization(mh());
487 if (result > 0) {
488 VM_Deoptimize op;
489 VMThread::execute(&op);
490 }
491 return result;
492 WB_END
493
494 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
495 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
496 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
497 MutexLockerEx mu(Compile_lock);
498 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
499 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
500 if (code == NULL) {
501 return JNI_FALSE;
502 }
503 return (code->is_alive() && !code->is_marked_for_deoptimization());
504 WB_END
505
506 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
507 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
508 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
509 MutexLockerEx mu(Compile_lock);
510 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
511 if (is_osr) {
512 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
513 } else {
514 return CompilationPolicy::can_be_compiled(mh, comp_level);
515 }
516 WB_END
517
518 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
519 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
520 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
521 MutexLockerEx mu(Compile_lock);
522 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
523 return mh->queued_for_compilation();
524 WB_END
525
526 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
527 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
528 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
529 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
530 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
531 return (code != NULL ? code->comp_level() : CompLevel_none);
532 WB_END
533
534 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
535 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
536 CHECK_JNI_EXCEPTION(env);
537 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
538 if (is_osr) {
539 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
540 } else {
541 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
542 }
543 WB_END
544
545 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
546 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
547 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
548 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
549 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
550 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
551 WB_END
552
553 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
554 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
555 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
556 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
557 bool result = mh->dont_inline();
558 mh->set_dont_inline(value == JNI_TRUE);
559 return result;
560 WB_END
561
562 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
563 if (comp_level == CompLevel_any) {
564 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
565 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
566 } else {
567 return CompileBroker::queue_size(comp_level);
568 }
569 WB_END
570
571 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
572 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
573 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
574 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
575 bool result = mh->force_inline();
576 mh->set_force_inline(value == JNI_TRUE);
577 return result;
578 WB_END
579
580 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
581 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
582 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
583 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
584 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
585 MutexLockerEx mu(Compile_lock);
586 return (mh->queued_for_compilation() || nm != NULL);
587 WB_END
588
589 class AlwaysFalseClosure : public BoolObjectClosure {
590 public:
591 bool do_object_b(oop p) { return false; }
592 };
593
594 static AlwaysFalseClosure always_false;
595
596 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
597 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
598 CHECK_JNI_EXCEPTION(env);
599 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
600 MutexLockerEx mu(Compile_lock);
601 MethodData* mdo = mh->method_data();
602 MethodCounters* mcs = mh->method_counters();
603
604 if (mdo != NULL) {
605 mdo->init();
606 ResourceMark rm;
607 int arg_count = mdo->method()->size_of_parameters();
608 for (int i = 0; i < arg_count; i++) {
609 mdo->set_arg_modified(i, 0);
610 }
611 MutexLockerEx mu(mdo->extra_data_lock());
612 mdo->clean_method_data(&always_false);
613 }
614
615 mh->clear_not_c1_compilable();
616 mh->clear_not_c2_compilable();
617 mh->clear_not_c2_osr_compilable();
618 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
619 if (mcs != NULL) {
620 mcs->backedge_counter()->init();
621 mcs->invocation_counter()->init();
622 mcs->set_interpreter_invocation_count(0);
623 mcs->set_interpreter_throwout_count(0);
624
625 #ifdef TIERED
626 mcs->set_rate(0.0F);
627 mh->set_prev_event_count(0);
628 mh->set_prev_time(0);
629 #endif
630 }
631 WB_END
632
633 template <typename T>
634 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
635 if (name == NULL) {
636 return false;
637 }
638 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
639 const char* flag_name = env->GetStringUTFChars(name, NULL);
640 bool result = (*TAt)(flag_name, value, true, true);
641 env->ReleaseStringUTFChars(name, flag_name);
642 return result;
643 }
644
645 template <typename T>
646 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
647 if (name == NULL) {
648 return false;
649 }
650 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
651 const char* flag_name = env->GetStringUTFChars(name, NULL);
652 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
653 env->ReleaseStringUTFChars(name, flag_name);
654 return result;
655 }
656
657 template <typename T>
658 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
659 ResourceMark rm(thread);
660 jclass clazz = env->FindClass(name->as_C_string());
661 CHECK_JNI_EXCEPTION_(env, NULL);
662 jmethodID methodID = env->GetStaticMethodID(clazz,
663 vmSymbols::valueOf_name()->as_C_string(),
664 sig->as_C_string());
665 CHECK_JNI_EXCEPTION_(env, NULL);
666 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
667 CHECK_JNI_EXCEPTION_(env, NULL);
668 return result;
669 }
670
671 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
672 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
673 }
674 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
675 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
676 }
677 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
678 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
679 }
680 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
681 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
682 }*/
683 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
684 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
685 }
686
687 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
688 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
689 const char* flag_name = env->GetStringUTFChars(name, NULL);
690 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
691 env->ReleaseStringUTFChars(name, flag_name);
692 return result;
693 }
694
695 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
696 Flag* flag = getVMFlag(thread, env, name);
697 return (flag != NULL) && flag->is_constant_in_binary();
698 WB_END
699
700 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
701 Flag* flag = getVMFlag(thread, env, name);
702 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
703 WB_END
704
705 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
706 bool result;
707 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
708 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
709 return booleanBox(thread, env, result);
710 }
711 return NULL;
712 WB_END
713
714 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
715 intx result;
716 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
717 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
718 return longBox(thread, env, result);
719 }
720 return NULL;
721 WB_END
722
723 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
724 uintx result;
725 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
726 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
727 return longBox(thread, env, result);
728 }
729 return NULL;
730 WB_END
731
732 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
733 uint64_t result;
734 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
735 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
736 return longBox(thread, env, result);
737 }
738 return NULL;
739 WB_END
740
741 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
742 uintx result;
743 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
744 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
745 return longBox(thread, env, result);
746 }
747 return NULL;
748 WB_END
749
750 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
751 double result;
752 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
753 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
754 return doubleBox(thread, env, result);
755 }
756 return NULL;
757 WB_END
758
759 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
760 ccstr ccstrResult;
761 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
762 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
763 jstring result = env->NewStringUTF(ccstrResult);
764 CHECK_JNI_EXCEPTION_(env, NULL);
765 return result;
766 }
767 return NULL;
768 WB_END
769
770 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
771 bool result = value == JNI_TRUE ? true : false;
772 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
773 WB_END
774
775 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
776 intx result = value;
777 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
778 WB_END
779
780 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
781 uintx result = value;
782 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
783 WB_END
784
785 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
786 uint64_t result = value;
787 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
788 WB_END
789
790 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
791 size_t result = value;
792 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
793 WB_END
794
795 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
796 double result = value;
797 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
798 WB_END
799
800 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
801 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
802 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
803 ccstr ccstrResult = ccstrValue;
804 bool needFree;
805 {
806 ThreadInVMfromNative ttvfn(thread); // back to VM
807 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
808 }
809 if (value != NULL) {
810 env->ReleaseStringUTFChars(value, ccstrValue);
811 }
812 if (needFree) {
813 FREE_C_HEAP_ARRAY(char, ccstrResult);
814 }
815 WB_END
816
817 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
818 WhiteBox::compilation_locked = true;
819 WB_END
820
821 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
822 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
823 WhiteBox::compilation_locked = false;
824 mo.notify_all();
825 WB_END
826
827 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
828 // Force a code cache sweep and block until it finished
829 NMethodSweeper::force_sweep();
830 WB_END
831
832 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
833 ResourceMark rm(THREAD);
834 int len;
835 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
836 return (StringTable::lookup(name, len) != NULL);
837 WB_END
838
839 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
840 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
841 Universe::heap()->collect(GCCause::_last_ditch_collection);
842 #if INCLUDE_ALL_GCS
843 if (UseG1GC) {
844 // Needs to be cleared explicitly for G1
845 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
846 }
847 #endif // INCLUDE_ALL_GCS
848 WB_END
849
850 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
851 Universe::heap()->collect(GCCause::_wb_young_gc);
852 WB_END
853
854 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
855 // static+volatile in order to force the read to happen
856 // (not be eliminated by the compiler)
857 static char c;
858 static volatile char* p;
859
860 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
861 if (p == NULL) {
862 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
863 }
864
865 c = *p;
866 WB_END
867
868 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
869 const char* cpu_features = VM_Version::cpu_features();
870 ThreadToNativeFromVM ttn(thread);
871 jstring features_string = env->NewStringUTF(cpu_features);
872
873 CHECK_JNI_EXCEPTION_(env, NULL);
874
875 return features_string;
876 WB_END
877
878 int WhiteBox::get_blob_type(const CodeBlob* code) {
879 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
880 return CodeCache::get_code_heap(code)->code_blob_type();
881 }
882
883 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
884 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
885 return CodeCache::get_code_heap(blob_type);
886 }
887
888 struct CodeBlobStub {
889 CodeBlobStub(const CodeBlob* blob) :
890 name(os::strdup(blob->name())),
891 size(blob->size()),
892 blob_type(WhiteBox::get_blob_type(blob)) { }
893 ~CodeBlobStub() { os::free((void*) name); }
894 const char* const name;
895 const int size;
896 const int blob_type;
897 };
898
899 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
900 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
901 CHECK_JNI_EXCEPTION_(env, NULL);
902 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
903
904 jstring name = env->NewStringUTF(cb->name);
905 CHECK_JNI_EXCEPTION_(env, NULL);
906 env->SetObjectArrayElement(result, 0, name);
907
908 jobject obj = integerBox(thread, env, cb->size);
909 CHECK_JNI_EXCEPTION_(env, NULL);
910 env->SetObjectArrayElement(result, 1, obj);
911
912 obj = integerBox(thread, env, cb->blob_type);
913 CHECK_JNI_EXCEPTION_(env, NULL);
914 env->SetObjectArrayElement(result, 2, obj);
915
916 return result;
917 }
918
919 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
920 ResourceMark rm(THREAD);
921 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
922 CHECK_JNI_EXCEPTION_(env, NULL);
923 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
924 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
925 jobjectArray result = NULL;
926 if (code == NULL) {
927 return result;
928 }
929 int insts_size = code->insts_size();
930
931 ThreadToNativeFromVM ttn(thread);
932 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
933 CHECK_JNI_EXCEPTION_(env, NULL);
934 result = env->NewObjectArray(4, clazz, NULL);
935 if (result == NULL) {
936 return result;
937 }
938
939 CodeBlobStub stub(code);
940 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
941 env->SetObjectArrayElement(result, 0, codeBlob);
942
943 jobject level = integerBox(thread, env, code->comp_level());
944 CHECK_JNI_EXCEPTION_(env, NULL);
945 env->SetObjectArrayElement(result, 1, level);
946
947 jbyteArray insts = env->NewByteArray(insts_size);
948 CHECK_JNI_EXCEPTION_(env, NULL);
949 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
950 env->SetObjectArrayElement(result, 2, insts);
951
952 jobject id = integerBox(thread, env, code->compile_id());
953 CHECK_JNI_EXCEPTION_(env, NULL);
954 env->SetObjectArrayElement(result, 3, id);
955
956 return result;
957 WB_END
958
959 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
960 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
961 BufferBlob* blob;
962 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
963 if (full_size < size) {
964 full_size += round_to(size - full_size, oopSize);
965 }
966 {
967 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
968 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
969 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
970 }
971 // Track memory usage statistic after releasing CodeCache_lock
972 MemoryService::track_code_cache_memory_usage();
973 return blob;
974 }
975
976 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
977 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
978 WB_END
979
980 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
981 BufferBlob::free((BufferBlob*) addr);
982 WB_END
983
984 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
985 ResourceMark rm;
986 GrowableArray<CodeBlobStub*> blobs;
987 {
988 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
989 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
990 if (heap == NULL) {
991 return NULL;
992 }
993 for (CodeBlob* cb = (CodeBlob*) heap->first();
994 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
995 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
996 new (stub) CodeBlobStub(cb);
997 blobs.append(stub);
998 }
999 }
1000 if (blobs.length() == 0) {
1001 return NULL;
1002 }
1003 ThreadToNativeFromVM ttn(thread);
1004 jobjectArray result = NULL;
1005 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1006 CHECK_JNI_EXCEPTION_(env, NULL);
1007 result = env->NewObjectArray(blobs.length(), clazz, NULL);
1008 if (result == NULL) {
1009 return result;
1010 }
1011 int i = 0;
1012 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1013 it != blobs.end(); ++it) {
1014 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1015 env->SetObjectArrayElement(result, i, obj);
1016 ++i;
1017 }
1018 return result;
1019 WB_END
1020
1021 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1022 return CompileBroker::get_compilation_activity_mode();
1023 WB_END
1024
1025 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1026 ThreadToNativeFromVM ttn(thread);
1027 CodeBlobStub stub((CodeBlob*) addr);
1028 return codeBlob2objectArray(thread, env, &stub);
1029 WB_END
1030
1031 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1032 return (jlong) Thread::current()->stack_size();
1033 WB_END
1034
1035 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1036 JavaThread* t = JavaThread::current();
1037 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
1038 WB_END
1039
1040 int WhiteBox::array_bytes_to_length(size_t bytes) {
1041 return Array<u1>::bytes_to_length(bytes);
1042 }
1043
1044 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1045 if (size < 0) {
1046 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1047 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1048 }
1049
1050 oop class_loader_oop = JNIHandles::resolve(class_loader);
1051 ClassLoaderData* cld = class_loader_oop != NULL
1052 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1053 : ClassLoaderData::the_null_class_loader_data();
1054
1055 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1056
1057 return (jlong)(uintptr_t)metadata;
1058 WB_END
1059
1060 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1061 oop class_loader_oop = JNIHandles::resolve(class_loader);
1062 ClassLoaderData* cld = class_loader_oop != NULL
1063 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1064 : ClassLoaderData::the_null_class_loader_data();
1065
1066 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1067 WB_END
1068
1069 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1070 if (inc < 0) {
1071 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1072 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1073 }
1074
1075 jlong max_size_t = (jlong) ((size_t) -1);
1076 if (inc > max_size_t) {
1077 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1078 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1079 }
1080
1081 size_t new_cap_until_GC = 0;
1082 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1083 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1084 if (!success) {
1085 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1086 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1087 "due to contention with another thread");
1088 }
1089 return (jlong) new_cap_until_GC;
1090 WB_END
1091
1092 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1093 return (jlong) MetaspaceGC::capacity_until_GC();
1094 WB_END
1095
1096 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1097 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1098 Monitor::_safepoint_check_always :
1099 Monitor::_safepoint_check_never;
1100 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1101 attemptedNoSafepointValue == JNI_TRUE);
1102 WB_END
1103
1104 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1105 oop obj_oop = JNIHandles::resolve(obj);
1106 return (jboolean) obj_oop->mark()->has_monitor();
1107 WB_END
1108
1109 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1110 VM_ForceSafepoint force_safepoint_op;
1111 VMThread::execute(&force_safepoint_op);
1112 WB_END
1113
1114 template <typename T>
1115 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1116 assert(value != NULL, "sanity");
1117 if (method == NULL || name == NULL) {
1118 return false;
1119 }
1120 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1121 CHECK_JNI_EXCEPTION_(env, false);
1122 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1123 // can't be in VM when we call JNI
1124 ThreadToNativeFromVM ttnfv(thread);
1125 const char* flag_name = env->GetStringUTFChars(name, NULL);
1126 bool result = CompilerOracle::has_option_value(mh, flag_name, *value);
1127 env->ReleaseStringUTFChars(name, flag_name);
1128 return result;
1129 }
1130
1131 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1132 bool result;
1133 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1134 // can't be in VM when we call JNI
1135 ThreadToNativeFromVM ttnfv(thread);
1136 return booleanBox(thread, env, result);
1137 }
1138 return NULL;
1139 WB_END
1140
1141 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1142 intx result;
1143 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1144 // can't be in VM when we call JNI
1145 ThreadToNativeFromVM ttnfv(thread);
1146 return longBox(thread, env, result);
1147 }
1148 return NULL;
1149 WB_END
1150
1151 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1152 uintx result;
1153 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1154 // can't be in VM when we call JNI
1155 ThreadToNativeFromVM ttnfv(thread);
1156 return longBox(thread, env, result);
1157 }
1158 return NULL;
1159 WB_END
1160
1161 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1162 double result;
1163 if (GetMethodOption <double> (thread, env, method, name, &result)) {
1164 // can't be in VM when we call JNI
1165 ThreadToNativeFromVM ttnfv(thread);
1166 return doubleBox(thread, env, result);
1167 }
1168 return NULL;
1169 WB_END
1170
1171 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1172 ccstr ccstrResult;
1173 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1174 // can't be in VM when we call JNI
1175 ThreadToNativeFromVM ttnfv(thread);
1176 jstring result = env->NewStringUTF(ccstrResult);
1177 CHECK_JNI_EXCEPTION_(env, NULL);
1178 return result;
1179 }
1180 return NULL;
1181 WB_END
1182
1183 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1184 oop obj_oop = JNIHandles::resolve(obj);
1185 return MetaspaceShared::is_in_shared_space((void*)obj_oop);
1186 WB_END
1187
1188 //Some convenience methods to deal with objects from java
1189 int WhiteBox::offset_for_field(const char* field_name, oop object,
1190 Symbol* signature_symbol) {
1191 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1192 Thread* THREAD = Thread::current();
1193
1194 //Get the class of our object
1195 Klass* arg_klass = object->klass();
1196 //Turn it into an instance-klass
1197 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1198
1199 //Create symbols to look for in the class
1200 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1201 THREAD);
1202
1203 //To be filled in with an offset of the field we're looking for
1204 fieldDescriptor fd;
1205
1206 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1207 if (res == NULL) {
1208 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1209 name_symbol->as_C_string());
1210 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
1211 }
1212
1213 //fetch the field at the offset we've found
1214 int dest_offset = fd.offset();
1215
1216 return dest_offset;
1217 }
1218
1219
1220 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1221 int offset = offset_for_field(field_name, object,
1222 vmSymbols::string_signature());
1223 oop string = object->obj_field(offset);
1224 if (string == NULL) {
1225 return NULL;
1226 }
1227 const char* ret = java_lang_String::as_utf8_string(string);
1228 return ret;
1229 }
1230
1231 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1232 int offset =
1233 offset_for_field(field_name, object, vmSymbols::bool_signature());
1234 bool ret = (object->bool_field(offset) == JNI_TRUE);
1235 return ret;
1236 }
1237
1238 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1239 ResourceMark rm;
1240 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1241
1242 // one by one registration natives for exception catching
1243 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1244 CHECK_JNI_EXCEPTION(env);
1245 for (int i = 0, n = method_count; i < n; ++i) {
1246 // Skip dummy entries
1247 if (method_array[i].fnPtr == NULL) continue;
1248 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1249 jthrowable throwable_obj = env->ExceptionOccurred();
1250 if (throwable_obj != NULL) {
1251 env->ExceptionClear();
1252 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1253 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1254 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1255 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1256 method_array[i].name, method_array[i].signature);
1257 }
1258 } else {
1259 // Registration failed unexpectedly.
1260 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1261 method_array[i].name, method_array[i].signature);
1262 env->UnregisterNatives(wbclass);
1263 break;
1264 }
1265 }
1266 }
1267 }
1268
1269 #define CC (char*)
1270
1271 static JNINativeMethod methods[] = {
1272 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1273 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1274 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1275 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1276 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1277 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
1278 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1279 {CC"parseCommandLine0",
1280 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1281 (void*) &WB_ParseCommandLine
1282 },
1283 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1284 (void*)&WB_AddToBootstrapClassLoaderSearch},
1285 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1286 (void*)&WB_AddToSystemClassLoaderSearch},
1287 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1288 (void*)&WB_GetCompressedOopsMaxHeapSize},
1289 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1290 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1291 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1292 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1293 #if INCLUDE_ALL_GCS
1294 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1295 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1296 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
1297 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1298 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1299 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1300 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1301 (void*)&WB_G1AuxiliaryMemoryUsage },
1302 #endif // INCLUDE_ALL_GCS
1303 #if INCLUDE_NMT
1304 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1305 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1306 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1307 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1308 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1309 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1310 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1311 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1312 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1313 #endif // INCLUDE_NMT
1314 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
1315 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1316 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
1317 (void*)&WB_DeoptimizeMethod },
1318 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
1319 (void*)&WB_IsMethodCompiled },
1320 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1321 (void*)&WB_IsMethodCompilable},
1322 {CC"isMethodQueuedForCompilation0",
1323 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1324 {CC"makeMethodNotCompilable0",
1325 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1326 {CC"testSetDontInlineMethod0",
1327 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1328 {CC"getMethodCompilationLevel0",
1329 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1330 {CC"getMethodEntryBci0",
1331 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1332 {CC"getCompileQueueSize",
1333 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1334 {CC"testSetForceInlineMethod0",
1335 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1336 {CC"enqueueMethodForCompilation0",
1337 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1338 {CC"clearMethodState0",
1339 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1340 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1341 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1342 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1343 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1344 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1345 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1346 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1347 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1348 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1349 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1350 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1351 (void*)&WB_SetStringVMFlag},
1352 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1353 (void*)&WB_GetBooleanVMFlag},
1354 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1355 (void*)&WB_GetIntxVMFlag},
1356 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1357 (void*)&WB_GetUintxVMFlag},
1358 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1359 (void*)&WB_GetUint64VMFlag},
1360 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1361 (void*)&WB_GetSizeTVMFlag},
1362 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1363 (void*)&WB_GetDoubleVMFlag},
1364 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1365 (void*)&WB_GetStringVMFlag},
1366 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1367 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1368 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1369 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1370 {CC"allocateMetaspace",
1371 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1372 {CC"freeMetaspace",
1373 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1374 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1375 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1376 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1377 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1378 (void*)&WB_GetNMethod },
1379 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
1380 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1381 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1382 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1383 {CC"getCompilationActivityMode",
1384 CC"()I", (void*)&WB_GetCompilationActivityMode},
1385 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1386 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1387 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1388 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
1389 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1390 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1391 {CC"getMethodBooleanOption",
1392 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1393 (void*)&WB_GetMethodBooleaneOption},
1394 {CC"getMethodIntxOption",
1395 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1396 (void*)&WB_GetMethodIntxOption},
1397 {CC"getMethodUintxOption",
1398 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1399 (void*)&WB_GetMethodUintxOption},
1400 {CC"getMethodDoubleOption",
1401 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1402 (void*)&WB_GetMethodDoubleOption},
1403 {CC"getMethodStringOption",
1404 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1405 (void*)&WB_GetMethodStringOption},
1406 {CC"isShared", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
1407 };
1408
1409 #undef CC
1410
1411 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1412 {
1413 if (WhiteBoxAPI) {
1414 // Make sure that wbclass is loaded by the null classloader
1415 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1416 Handle loader(ikh->class_loader());
1417 if (loader.is_null()) {
1418 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1419 WhiteBox::register_extended(env, wbclass, thread);
1420 WhiteBox::set_used();
1421 }
1422 }
1423 }
1424 JVM_END