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