1 /*
2 * Copyright (c) 2012, 2014, 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 "code/codeCache.hpp"
30 #include "memory/metadataFactory.hpp"
31 #include "memory/universe.hpp"
32 #include "oops/oop.inline.hpp"
33
34 #include "classfile/stringTable.hpp"
35 #include "classfile/classLoaderData.hpp"
36
37 #include "prims/whitebox.hpp"
38 #include "prims/wbtestmethods/parserTests.hpp"
39
40 #include "runtime/thread.hpp"
41 #include "runtime/arguments.hpp"
42 #include "runtime/deoptimization.hpp"
43 #include "runtime/interfaceSupport.hpp"
44 #include "runtime/os.hpp"
45 #include "runtime/vm_version.hpp"
46 #include "runtime/sweeper.hpp"
47
48 #include "utilities/array.hpp"
49 #include "utilities/debug.hpp"
50 #include "utilities/macros.hpp"
51 #include "utilities/exceptions.hpp"
52
53 #if INCLUDE_ALL_GCS
54 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
55 #include "gc_implementation/g1/concurrentMark.hpp"
56 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
57 #include "gc_implementation/g1/heapRegionRemSet.hpp"
58 #endif // INCLUDE_ALL_GCS
59
60 #if INCLUDE_NMT
61 #include "services/mallocSiteTable.hpp"
62 #include "services/memTracker.hpp"
63 #include "utilities/nativeCallStack.hpp"
64 #endif // INCLUDE_NMT
65
66 #include "compiler/compileBroker.hpp"
67 #include "jvmtifiles/jvmtiEnv.hpp"
68 #include "runtime/compilationPolicy.hpp"
69
70 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
71
72 #define SIZE_T_MAX_VALUE ((size_t) -1)
73
74 bool WhiteBox::_used = false;
75 volatile bool WhiteBox::compilation_locked = false;
76
77 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
78 return (jlong)(void*)JNIHandles::resolve(obj);
79 WB_END
80
81 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
82 return heapOopSize;
83 WB_END
84
85
86 class WBIsKlassAliveClosure : public KlassClosure {
87 Symbol* _name;
88 bool _found;
89 public:
90 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
91
92 void do_klass(Klass* k) {
93 if (_found) return;
94 Symbol* ksym = k->name();
95 if (ksym->fast_compare(_name) == 0) {
96 _found = true;
97 }
98 }
99
100 bool found() const {
101 return _found;
102 }
103 };
104
105 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
106 Handle h_name = JNIHandles::resolve(name);
107 if (h_name.is_null()) return false;
108 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
109 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
110
111 WBIsKlassAliveClosure closure(sym);
112 ClassLoaderDataGraph::classes_do(&closure);
113
114 return closure.found();
115 WB_END
116
117 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
118 #if INCLUDE_JVMTI
119 const char* seg;
120 {
121 ThreadToNativeFromVM ttnfv(thread);
122 seg = env->GetStringUTFChars(segment, NULL);
123 }
124 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
125 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
126 assert(err == JVMTI_ERROR_NONE, "must not fail");
127 {
128 ThreadToNativeFromVM ttnfv(thread);
129 env->ReleaseStringUTFChars(segment, seg);
130 }
131 #endif
132 }
133 WB_END
134
135 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
136 #if INCLUDE_JVMTI
137 const char* seg;
138 {
139 ThreadToNativeFromVM ttnfv(thread);
140 seg = env->GetStringUTFChars(segment, NULL);
141 }
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 {
146 ThreadToNativeFromVM ttnfv(thread);
147 env->ReleaseStringUTFChars(segment, seg);
148 }
149 #endif
150 }
151 WB_END
152
153
154 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
155 return (jlong)Arguments::max_heap_for_compressed_oops();
156 }
157 WB_END
158
159 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
160 CollectorPolicy * p = Universe::heap()->collector_policy();
161 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
162 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
163 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
164 p->space_alignment(), p->heap_alignment());
165 }
166 WB_END
167
168 #ifndef PRODUCT
169 // Forward declaration
170 void TestReservedSpace_test();
171 void TestReserveMemorySpecial_test();
172 void TestVirtualSpace_test();
173 void TestMetaspaceAux_test();
174 #endif
175
176 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
177 #ifndef PRODUCT
178 TestReservedSpace_test();
179 TestReserveMemorySpecial_test();
180 TestVirtualSpace_test();
181 TestMetaspaceAux_test();
182 #endif
183 WB_END
184
185 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
186 size_t granularity = os::vm_allocation_granularity();
187 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
188 VirtualSpace vs;
189 vs.initialize(rhs, 50 * granularity);
190
191 //Check if constraints are complied
192 if (!( UseCompressedOops && rhs.base() != NULL &&
193 Universe::narrow_oop_base() != NULL &&
194 Universe::narrow_oop_use_implicit_null_checks() )) {
195 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
196 "\tUseCompressedOops is %d\n"
197 "\trhs.base() is "PTR_FORMAT"\n"
198 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
199 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
200 UseCompressedOops,
201 rhs.base(),
202 Universe::narrow_oop_base(),
203 Universe::narrow_oop_use_implicit_null_checks());
204 return;
205 }
206 tty->print_cr("Reading from no access area... ");
207 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
208 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
209 WB_END
210
211 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
212 size_t magnitude, size_t iterations) {
213 size_t granularity = os::vm_allocation_granularity();
214 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
215 VirtualSpace vs;
216 if (!vs.initialize(rhs, 0)) {
217 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
218 return 3;
219 }
220
221 long seed = os::random();
222 tty->print_cr("Random seed is %ld", seed);
223 os::init_random(seed);
224
225 for (size_t i = 0; i < iterations; i++) {
226
227 // Whether we will shrink or grow
228 bool shrink = os::random() % 2L == 0;
229
230 // Get random delta to resize virtual space
231 size_t delta = (size_t)os::random() % magnitude;
232
233 // If we are about to shrink virtual space below zero, then expand instead
234 if (shrink && vs.committed_size() < delta) {
235 shrink = false;
236 }
237
238 // Resizing by delta
239 if (shrink) {
240 vs.shrink_by(delta);
241 } else {
242 // If expanding fails expand_by will silently return false
243 vs.expand_by(delta, true);
244 }
245 }
246 return 0;
247 }
248
249 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
250 jlong reserved_space_size, jlong magnitude, jlong iterations))
251 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
252 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
253 iterations);
254 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
255 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
256 return 1;
257 }
258
259 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
260 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
261 if (sizeof(size_t) < sizeof(jlong)) {
262 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
263 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
264 || iterations > size_t_max_value) {
265 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
266 return 2;
267 }
268 }
269
270 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
271 (size_t) magnitude, (size_t) iterations);
272 WB_END
273
274 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
275 oop p = JNIHandles::resolve(obj);
276 #if INCLUDE_ALL_GCS
277 if (UseG1GC) {
278 G1CollectedHeap* g1 = G1CollectedHeap::heap();
279 const HeapRegion* hr = g1->heap_region_containing(p);
280 if (hr == NULL) {
281 return false;
282 }
283 return !(hr->is_young());
284 } else if (UseParallelGC) {
285 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
286 return !psh->is_in_young(p);
287 }
288 #endif // INCLUDE_ALL_GCS
289 GenCollectedHeap* gch = GenCollectedHeap::heap();
290 return !gch->is_in_young(p);
291 WB_END
292
293 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
294 oop p = JNIHandles::resolve(obj);
295 return p->size() * HeapWordSize;
296 WB_END
297
298 #if INCLUDE_ALL_GCS
299 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
300 G1CollectedHeap* g1 = G1CollectedHeap::heap();
301 oop result = JNIHandles::resolve(obj);
302 const HeapRegion* hr = g1->heap_region_containing(result);
303 return hr->is_humongous();
304 WB_END
305
306 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
307 G1CollectedHeap* g1 = G1CollectedHeap::heap();
308 size_t nr = g1->num_free_regions();
309 return (jlong)nr;
310 WB_END
311
312 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
313 G1CollectedHeap* g1 = G1CollectedHeap::heap();
314 ConcurrentMark* cm = g1->concurrent_mark();
315 return cm->concurrent_marking_in_progress();
316 WB_END
317
318 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
319 return (jint)HeapRegion::GrainBytes;
320 WB_END
321 #endif // INCLUDE_ALL_GCS
322
323 #if INCLUDE_NMT
324 // Alloc memory using the test memory type so that we can use that to see if
325 // NMT picks it up correctly
326 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
327 jlong addr = 0;
328 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
329 return addr;
330 WB_END
331
332 // Alloc memory with pseudo call stack. The test can create psudo malloc
333 // allocation site to stress the malloc tracking.
334 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
335 address pc = (address)(size_t)pseudo_stack;
336 NativeCallStack stack(&pc, 1);
337 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
338 WB_END
339
340 // Free the memory allocated by NMTAllocTest
341 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
342 os::free((void*)(uintptr_t)mem, mtTest);
343 WB_END
344
345 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
346 jlong addr = 0;
347
348 addr = (jlong)(uintptr_t)os::reserve_memory(size);
349 MemTracker::record_virtual_memory_type((address)addr, mtTest);
350
351 return addr;
352 WB_END
353
354 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
355 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
356 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
357 WB_END
358
359 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
360 os::uncommit_memory((char *)(uintptr_t)addr, size);
361 WB_END
362
363 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
364 os::release_memory((char *)(uintptr_t)addr, size);
365 WB_END
366
367 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
368 return MemTracker::tracking_level() == NMT_detail;
369 WB_END
370
371 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
372 // Test that we can downgrade NMT levels but not upgrade them.
373 if (MemTracker::tracking_level() == NMT_off) {
374 MemTracker::transition_to(NMT_off);
375 return MemTracker::tracking_level() == NMT_off;
376 } else {
377 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
378 MemTracker::transition_to(NMT_summary);
379 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
380
381 // Can't go to detail once NMT is set to summary.
382 MemTracker::transition_to(NMT_detail);
383 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
384
385 // Shutdown sets tracking level to minimal.
386 MemTracker::shutdown();
387 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
388
389 // Once the tracking level is minimal, we cannot increase to summary.
390 // The code ignores this request instead of asserting because if the malloc site
391 // table overflows in another thread, it tries to change the code to summary.
392 MemTracker::transition_to(NMT_summary);
393 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
394
395 // Really can never go up to detail, verify that the code would never do this.
396 MemTracker::transition_to(NMT_detail);
397 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
398 return MemTracker::tracking_level() == NMT_minimal;
399 }
400 WB_END
401
402 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
403 int hash_size = MallocSiteTable::hash_buckets();
404 assert(hash_size > 0, "NMT hash_size should be > 0");
405 return (jint)hash_size;
406 WB_END
407 #endif // INCLUDE_NMT
408
409 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
410 assert(method != NULL, "method should not be null");
411 ThreadToNativeFromVM ttn(thread);
412 return env->FromReflectedMethod(method);
413 }
414
415 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
416 MutexLockerEx mu(Compile_lock);
417 CodeCache::mark_all_nmethods_for_deoptimization();
418 VM_Deoptimize op;
419 VMThread::execute(&op);
420 WB_END
421
422 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
423 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
424 int result = 0;
425 CHECK_JNI_EXCEPTION_(env, result);
426 MutexLockerEx mu(Compile_lock);
427 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
428 if (is_osr) {
429 result += mh->mark_osr_nmethods();
430 } else if (mh->code() != NULL) {
431 mh->code()->mark_for_deoptimization();
432 ++result;
433 }
434 result += CodeCache::mark_for_deoptimization(mh());
435 if (result > 0) {
436 VM_Deoptimize op;
437 VMThread::execute(&op);
438 }
439 return result;
440 WB_END
441
442 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
443 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
444 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
445 MutexLockerEx mu(Compile_lock);
446 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
447 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
448 if (code == NULL) {
449 return JNI_FALSE;
450 }
451 return (code->is_alive() && !code->is_marked_for_deoptimization());
452 WB_END
453
454 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
455 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
456 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
457 MutexLockerEx mu(Compile_lock);
458 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
459 if (is_osr) {
460 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
461 } else {
462 return CompilationPolicy::can_be_compiled(mh, comp_level);
463 }
464 WB_END
465
466 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
467 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
468 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
469 MutexLockerEx mu(Compile_lock);
470 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
471 return mh->queued_for_compilation();
472 WB_END
473
474 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
475 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
476 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
477 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
478 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
479 return (code != NULL ? code->comp_level() : CompLevel_none);
480 WB_END
481
482 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
483 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
484 CHECK_JNI_EXCEPTION(env);
485 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
486 if (is_osr) {
487 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
488 } else {
489 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
490 }
491 WB_END
492
493 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
494 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
495 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
496 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
497 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
498 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
499 WB_END
500
501 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
502 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
503 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
504 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
505 bool result = mh->dont_inline();
506 mh->set_dont_inline(value == JNI_TRUE);
507 return result;
508 WB_END
509
510 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
511 if (comp_level == CompLevel_any) {
512 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
513 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
514 } else {
515 return CompileBroker::queue_size(comp_level);
516 }
517 WB_END
518
519 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
520 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
521 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
522 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
523 bool result = mh->force_inline();
524 mh->set_force_inline(value == JNI_TRUE);
525 return result;
526 WB_END
527
528 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
529 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
530 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
531 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
532 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
533 MutexLockerEx mu(Compile_lock);
534 return (mh->queued_for_compilation() || nm != NULL);
535 WB_END
536
537 class VM_WhiteBoxOperation : public VM_Operation {
538 public:
539 VM_WhiteBoxOperation() { }
540 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
541 bool allow_nested_vm_operations() const { return true; }
542 };
543
544 class AlwaysFalseClosure : public BoolObjectClosure {
545 public:
546 bool do_object_b(oop p) { return false; }
547 };
548
549 static AlwaysFalseClosure always_false;
550
551 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
552 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
553 CHECK_JNI_EXCEPTION(env);
554 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
555 MutexLockerEx mu(Compile_lock);
556 MethodData* mdo = mh->method_data();
557 MethodCounters* mcs = mh->method_counters();
558
559 if (mdo != NULL) {
560 mdo->init();
561 ResourceMark rm;
562 int arg_count = mdo->method()->size_of_parameters();
563 for (int i = 0; i < arg_count; i++) {
564 mdo->set_arg_modified(i, 0);
565 }
566 MutexLockerEx mu(mdo->extra_data_lock());
567 mdo->clean_method_data(&always_false);
568 }
569
570 mh->clear_not_c1_compilable();
571 mh->clear_not_c2_compilable();
572 mh->clear_not_c2_osr_compilable();
573 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
574 if (mcs != NULL) {
575 mcs->backedge_counter()->init();
576 mcs->invocation_counter()->init();
577 mcs->set_interpreter_invocation_count(0);
578 mcs->set_interpreter_throwout_count(0);
579
580 #ifdef TIERED
581 mcs->set_rate(0.0F);
582 mh->set_prev_event_count(0);
583 mh->set_prev_time(0);
584 #endif
585 }
586 WB_END
587
588 template <typename T>
589 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
590 if (name == NULL) {
591 return false;
592 }
593 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
594 const char* flag_name = env->GetStringUTFChars(name, NULL);
595 bool result = (*TAt)(flag_name, value, true, true);
596 env->ReleaseStringUTFChars(name, flag_name);
597 return result;
598 }
599
600 template <typename T>
601 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
602 if (name == NULL) {
603 return false;
604 }
605 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
606 const char* flag_name = env->GetStringUTFChars(name, NULL);
607 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
608 env->ReleaseStringUTFChars(name, flag_name);
609 return result;
610 }
611
612 template <typename T>
613 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
614 ResourceMark rm(thread);
615 jclass clazz = env->FindClass(name->as_C_string());
616 CHECK_JNI_EXCEPTION_(env, NULL);
617 jmethodID methodID = env->GetStaticMethodID(clazz,
618 vmSymbols::valueOf_name()->as_C_string(),
619 sig->as_C_string());
620 CHECK_JNI_EXCEPTION_(env, NULL);
621 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
622 CHECK_JNI_EXCEPTION_(env, NULL);
623 return result;
624 }
625
626 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
627 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
628 }
629 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
630 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
631 }
632 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
633 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
634 }
635 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
636 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
637 }*/
638 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
639 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
640 }
641
642 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
643 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
644 const char* flag_name = env->GetStringUTFChars(name, NULL);
645 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
646 env->ReleaseStringUTFChars(name, flag_name);
647 return result;
648 }
649
650 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
651 Flag* flag = getVMFlag(thread, env, name);
652 return (flag != NULL) && flag->is_constant_in_binary();
653 WB_END
654
655 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
656 Flag* flag = getVMFlag(thread, env, name);
657 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
658 WB_END
659
660 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
661 bool result;
662 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
663 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
664 return booleanBox(thread, env, result);
665 }
666 return NULL;
667 WB_END
668
669 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
670 intx result;
671 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
672 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
673 return longBox(thread, env, result);
674 }
675 return NULL;
676 WB_END
677
678 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
679 uintx result;
680 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
681 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
682 return longBox(thread, env, result);
683 }
684 return NULL;
685 WB_END
686
687 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
688 uint64_t result;
689 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
690 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
691 return longBox(thread, env, result);
692 }
693 return NULL;
694 WB_END
695
696 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
697 uintx result;
698 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
699 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
700 return longBox(thread, env, result);
701 }
702 return NULL;
703 WB_END
704
705 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
706 double result;
707 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
708 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
709 return doubleBox(thread, env, result);
710 }
711 return NULL;
712 WB_END
713
714 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
715 ccstr ccstrResult;
716 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
717 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
718 jstring result = env->NewStringUTF(ccstrResult);
719 CHECK_JNI_EXCEPTION_(env, NULL);
720 return result;
721 }
722 return NULL;
723 WB_END
724
725 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
726 bool result = value == JNI_TRUE ? true : false;
727 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
728 WB_END
729
730 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
731 intx result = value;
732 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
733 WB_END
734
735 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
736 uintx result = value;
737 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
738 WB_END
739
740 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
741 uint64_t result = value;
742 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
743 WB_END
744
745 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
746 size_t result = value;
747 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
748 WB_END
749
750 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
751 double result = value;
752 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
753 WB_END
754
755 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
756 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
757 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
758 ccstr ccstrResult = ccstrValue;
759 bool needFree;
760 {
761 ThreadInVMfromNative ttvfn(thread); // back to VM
762 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
763 }
764 if (value != NULL) {
765 env->ReleaseStringUTFChars(value, ccstrValue);
766 }
767 if (needFree) {
768 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal);
769 }
770 WB_END
771
772
773 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
774 WhiteBox::compilation_locked = true;
775 WB_END
776
777 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
778 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
779 WhiteBox::compilation_locked = false;
780 mo.notify_all();
781 WB_END
782
783 void WhiteBox::force_sweep() {
784 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
785 {
786 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
787 NMethodSweeper::_should_sweep = true;
788 }
789 NMethodSweeper::possibly_sweep();
790 }
791
792 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
793 WhiteBox::force_sweep();
794 WB_END
795
796 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
797 ResourceMark rm(THREAD);
798 int len;
799 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
800 return (StringTable::lookup(name, len) != NULL);
801 WB_END
802
803 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
804 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
805 Universe::heap()->collect(GCCause::_last_ditch_collection);
806 #if INCLUDE_ALL_GCS
807 if (UseG1GC) {
808 // Needs to be cleared explicitly for G1
809 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
810 }
811 #endif // INCLUDE_ALL_GCS
812 WB_END
813
814 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
815 Universe::heap()->collect(GCCause::_wb_young_gc);
816 WB_END
817
818 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
819 // static+volatile in order to force the read to happen
820 // (not be eliminated by the compiler)
821 static char c;
822 static volatile char* p;
823
824 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
825 if (p == NULL) {
826 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
827 }
828
829 c = *p;
830 WB_END
831
832 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
833 const char* cpu_features = VM_Version::cpu_features();
834 ThreadToNativeFromVM ttn(thread);
835 jstring features_string = env->NewStringUTF(cpu_features);
836
837 CHECK_JNI_EXCEPTION_(env, NULL);
838
839 return features_string;
840 WB_END
841
842 int WhiteBox::get_blob_type(const CodeBlob* code) {
843 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
844 return CodeCache::get_code_heap(code)->code_blob_type();
845 }
846
847 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
848 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
849 return CodeCache::get_code_heap(blob_type);
850 }
851
852 struct CodeBlobStub {
853 CodeBlobStub(const CodeBlob* blob) :
854 name(os::strdup(blob->name())),
855 size(blob->size()),
856 blob_type(WhiteBox::get_blob_type(blob)) { }
857 ~CodeBlobStub() { os::free((void*) name); }
858 const char* const name;
859 const int size;
860 const int blob_type;
861 };
862
863 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
864 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
865 CHECK_JNI_EXCEPTION_(env, NULL);
866 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
867
868 jstring name = env->NewStringUTF(cb->name);
869 CHECK_JNI_EXCEPTION_(env, NULL);
870 env->SetObjectArrayElement(result, 0, name);
871
872 jobject obj = integerBox(thread, env, cb->size);
873 CHECK_JNI_EXCEPTION_(env, NULL);
874 env->SetObjectArrayElement(result, 1, obj);
875
876 obj = integerBox(thread, env, cb->blob_type);
877 CHECK_JNI_EXCEPTION_(env, NULL);
878 env->SetObjectArrayElement(result, 2, obj);
879
880 return result;
881 }
882
883 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
884 ResourceMark rm(THREAD);
885 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
886 CHECK_JNI_EXCEPTION_(env, NULL);
887 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
888 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
889 jobjectArray result = NULL;
890 if (code == NULL) {
891 return result;
892 }
893 int insts_size = code->insts_size();
894
895 ThreadToNativeFromVM ttn(thread);
896 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
897 CHECK_JNI_EXCEPTION_(env, NULL);
898 result = env->NewObjectArray(4, clazz, NULL);
899 if (result == NULL) {
900 return result;
901 }
902
903 CodeBlobStub stub(code);
904 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
905 env->SetObjectArrayElement(result, 0, codeBlob);
906
907 jobject level = integerBox(thread, env, code->comp_level());
908 CHECK_JNI_EXCEPTION_(env, NULL);
909 env->SetObjectArrayElement(result, 1, level);
910
911 jbyteArray insts = env->NewByteArray(insts_size);
912 CHECK_JNI_EXCEPTION_(env, NULL);
913 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
914 env->SetObjectArrayElement(result, 2, insts);
915
916 jobject id = integerBox(thread, env, code->compile_id());
917 CHECK_JNI_EXCEPTION_(env, NULL);
918 env->SetObjectArrayElement(result, 3, id);
919
920 return result;
921 WB_END
922
923 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
924 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
925 BufferBlob* blob;
926 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
927 if (full_size < size) {
928 full_size += round_to(size - full_size, oopSize);
929 }
930 {
931 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
932 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
933 }
934 // Track memory usage statistic after releasing CodeCache_lock
935 MemoryService::track_code_cache_memory_usage();
936 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
937 return blob;
938 }
939
940 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
941 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
942 WB_END
943
944 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
945 BufferBlob::free((BufferBlob*) addr);
946 WB_END
947
948 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
949 ResourceMark rm;
950 GrowableArray<CodeBlobStub*> blobs;
951 {
952 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
953 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
954 if (heap == NULL) {
955 return NULL;
956 }
957 for (CodeBlob* cb = (CodeBlob*) heap->first();
958 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
959 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
960 new (stub) CodeBlobStub(cb);
961 blobs.append(stub);
962 }
963 }
964 if (blobs.length() == 0) {
965 return NULL;
966 }
967 ThreadToNativeFromVM ttn(thread);
968 jobjectArray result = NULL;
969 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
970 CHECK_JNI_EXCEPTION_(env, NULL);
971 result = env->NewObjectArray(blobs.length(), clazz, NULL);
972 if (result == NULL) {
973 return result;
974 }
975 int i = 0;
976 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
977 it != blobs.end(); ++it) {
978 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
979 env->SetObjectArrayElement(result, i, obj);
980 ++i;
981 }
982 return result;
983 WB_END
984
985 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
986 return (jlong) Thread::current()->stack_size();
987 WB_END
988
989 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
990 JavaThread* t = JavaThread::current();
991 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
992 WB_END
993
994 int WhiteBox::array_bytes_to_length(size_t bytes) {
995 return Array<u1>::bytes_to_length(bytes);
996 }
997
998 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
999 if (size < 0) {
1000 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1001 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1002 }
1003
1004 oop class_loader_oop = JNIHandles::resolve(class_loader);
1005 ClassLoaderData* cld = class_loader_oop != NULL
1006 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1007 : ClassLoaderData::the_null_class_loader_data();
1008
1009 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1010
1011 return (jlong)(uintptr_t)metadata;
1012 WB_END
1013
1014 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1015 oop class_loader_oop = JNIHandles::resolve(class_loader);
1016 ClassLoaderData* cld = class_loader_oop != NULL
1017 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1018 : ClassLoaderData::the_null_class_loader_data();
1019
1020 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1021 WB_END
1022
1023 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1024 if (inc < 0) {
1025 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1026 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1027 }
1028
1029 jlong max_size_t = (jlong) ((size_t) -1);
1030 if (inc > max_size_t) {
1031 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1032 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1033 }
1034
1035 size_t new_cap_until_GC = 0;
1036 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1037 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1038 if (!success) {
1039 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1040 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1041 "due to contention with another thread");
1042 }
1043 return (jlong) new_cap_until_GC;
1044 WB_END
1045
1046 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1047 return (jlong) MetaspaceGC::capacity_until_GC();
1048 WB_END
1049
1050 //Some convenience methods to deal with objects from java
1051 int WhiteBox::offset_for_field(const char* field_name, oop object,
1052 Symbol* signature_symbol) {
1053 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1054 Thread* THREAD = Thread::current();
1055
1056 //Get the class of our object
1057 Klass* arg_klass = object->klass();
1058 //Turn it into an instance-klass
1059 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1060
1061 //Create symbols to look for in the class
1062 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1063 THREAD);
1064
1065 //To be filled in with an offset of the field we're looking for
1066 fieldDescriptor fd;
1067
1068 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1069 if (res == NULL) {
1070 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1071 name_symbol->as_C_string());
1072 fatal("Invalid layout of preloaded class");
1073 }
1074
1075 //fetch the field at the offset we've found
1076 int dest_offset = fd.offset();
1077
1078 return dest_offset;
1079 }
1080
1081
1082 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1083 int offset = offset_for_field(field_name, object,
1084 vmSymbols::string_signature());
1085 oop string = object->obj_field(offset);
1086 if (string == NULL) {
1087 return NULL;
1088 }
1089 const char* ret = java_lang_String::as_utf8_string(string);
1090 return ret;
1091 }
1092
1093 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1094 int offset =
1095 offset_for_field(field_name, object, vmSymbols::bool_signature());
1096 bool ret = (object->bool_field(offset) == JNI_TRUE);
1097 return ret;
1098 }
1099
1100 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1101 ResourceMark rm;
1102 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1103
1104 // one by one registration natives for exception catching
1105 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1106 CHECK_JNI_EXCEPTION(env);
1107 for (int i = 0, n = method_count; i < n; ++i) {
1108 // Skip dummy entries
1109 if (method_array[i].fnPtr == NULL) continue;
1110 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1111 jthrowable throwable_obj = env->ExceptionOccurred();
1112 if (throwable_obj != NULL) {
1113 env->ExceptionClear();
1114 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1115 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1116 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1117 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1118 method_array[i].name, method_array[i].signature);
1119 }
1120 } else {
1121 // Registration failed unexpectedly.
1122 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1123 method_array[i].name, method_array[i].signature);
1124 env->UnregisterNatives(wbclass);
1125 break;
1126 }
1127 }
1128 }
1129 }
1130
1131 #define CC (char*)
1132
1133 static JNINativeMethod methods[] = {
1134 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1135 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1136 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1137 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1138 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1139 {CC"parseCommandLine",
1140 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1141 (void*) &WB_ParseCommandLine
1142 },
1143 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V",
1144 (void*)&WB_AddToBootstrapClassLoaderSearch},
1145 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V",
1146 (void*)&WB_AddToSystemClassLoaderSearch},
1147 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1148 (void*)&WB_GetCompressedOopsMaxHeapSize},
1149 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1150 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1151 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1152 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1153 #if INCLUDE_ALL_GCS
1154 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1155 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1156 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1157 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1158 #endif // INCLUDE_ALL_GCS
1159 #if INCLUDE_NMT
1160 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1161 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1162 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1163 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1164 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1165 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1166 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1167 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1168 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1169 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1170 #endif // INCLUDE_NMT
1171 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1172 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1173 (void*)&WB_DeoptimizeMethod },
1174 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1175 (void*)&WB_IsMethodCompiled },
1176 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1177 (void*)&WB_IsMethodCompilable},
1178 {CC"isMethodQueuedForCompilation",
1179 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1180 {CC"makeMethodNotCompilable",
1181 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1182 {CC"testSetDontInlineMethod",
1183 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1184 {CC"getMethodCompilationLevel",
1185 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1186 {CC"getMethodEntryBci",
1187 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1188 {CC"getCompileQueueSize",
1189 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1190 {CC"testSetForceInlineMethod",
1191 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1192 {CC"enqueueMethodForCompilation",
1193 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1194 {CC"clearMethodState",
1195 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1196 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1197 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1198 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1199 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1200 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1201 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1202 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1203 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1204 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1205 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1206 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1207 (void*)&WB_SetStringVMFlag},
1208 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1209 (void*)&WB_GetBooleanVMFlag},
1210 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1211 (void*)&WB_GetIntxVMFlag},
1212 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1213 (void*)&WB_GetUintxVMFlag},
1214 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1215 (void*)&WB_GetUint64VMFlag},
1216 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1217 (void*)&WB_GetSizeTVMFlag},
1218 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1219 (void*)&WB_GetDoubleVMFlag},
1220 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1221 (void*)&WB_GetStringVMFlag},
1222 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1223 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1224 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1225 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1226 {CC"allocateMetaspace",
1227 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1228 {CC"freeMetaspace",
1229 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1230 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1231 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1232 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1233 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1234 (void*)&WB_GetNMethod },
1235 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
1236 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1237 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1238 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1239 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1240 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1241 };
1242
1243 #undef CC
1244
1245 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1246 {
1247 if (WhiteBoxAPI) {
1248 // Make sure that wbclass is loaded by the null classloader
1249 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1250 Handle loader(ikh->class_loader());
1251 if (loader.is_null()) {
1252 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1253 WhiteBox::register_extended(env, wbclass, thread);
1254 WhiteBox::set_used();
1255 }
1256 }
1257 }
1258 JVM_END