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 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
86 return os::vm_page_size();
87 WB_END
88
89 class WBIsKlassAliveClosure : public KlassClosure {
90 Symbol* _name;
91 bool _found;
92 public:
93 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
94
95 void do_klass(Klass* k) {
96 if (_found) return;
97 Symbol* ksym = k->name();
98 if (ksym->fast_compare(_name) == 0) {
99 _found = true;
100 }
101 }
102
103 bool found() const {
104 return _found;
105 }
106 };
107
108 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
109 Handle h_name = JNIHandles::resolve(name);
110 if (h_name.is_null()) return false;
111 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
112 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
113
114 WBIsKlassAliveClosure closure(sym);
115 ClassLoaderDataGraph::classes_do(&closure);
116
117 return closure.found();
118 WB_END
119
120 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
121 #if INCLUDE_JVMTI
122 ResourceMark rm;
123 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
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 #endif
128 }
129 WB_END
130
131 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
132 #if INCLUDE_JVMTI
133 ResourceMark rm;
134 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
135 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
136 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
137 assert(err == JVMTI_ERROR_NONE, "must not fail");
138 #endif
139 }
140 WB_END
141
142
143 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
144 return (jlong)Arguments::max_heap_for_compressed_oops();
145 }
146 WB_END
147
148 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
149 CollectorPolicy * p = Universe::heap()->collector_policy();
150 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap "
151 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT,
152 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
153 p->space_alignment(), p->heap_alignment());
154 }
155 WB_END
156
157 #ifndef PRODUCT
158 // Forward declaration
159 void TestReservedSpace_test();
160 void TestReserveMemorySpecial_test();
161 void TestVirtualSpace_test();
162 void TestMetaspaceAux_test();
163 #endif
164
165 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
166 #ifndef PRODUCT
167 TestReservedSpace_test();
168 TestReserveMemorySpecial_test();
169 TestVirtualSpace_test();
170 TestMetaspaceAux_test();
171 #endif
172 WB_END
173
174 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
175 size_t granularity = os::vm_allocation_granularity();
176 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL);
177 VirtualSpace vs;
178 vs.initialize(rhs, 50 * granularity);
179
180 //Check if constraints are complied
181 if (!( UseCompressedOops && rhs.base() != NULL &&
182 Universe::narrow_oop_base() != NULL &&
183 Universe::narrow_oop_use_implicit_null_checks() )) {
184 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
185 "\tUseCompressedOops is %d\n"
186 "\trhs.base() is "PTR_FORMAT"\n"
187 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n"
188 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
189 UseCompressedOops,
190 rhs.base(),
191 Universe::narrow_oop_base(),
192 Universe::narrow_oop_use_implicit_null_checks());
193 return;
194 }
195 tty->print_cr("Reading from no access area... ");
196 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
197 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
198 WB_END
199
200 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
201 size_t magnitude, size_t iterations) {
202 size_t granularity = os::vm_allocation_granularity();
203 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL);
204 VirtualSpace vs;
205 if (!vs.initialize(rhs, 0)) {
206 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
207 return 3;
208 }
209
210 long seed = os::random();
211 tty->print_cr("Random seed is %ld", seed);
212 os::init_random(seed);
213
214 for (size_t i = 0; i < iterations; i++) {
215
216 // Whether we will shrink or grow
217 bool shrink = os::random() % 2L == 0;
218
219 // Get random delta to resize virtual space
220 size_t delta = (size_t)os::random() % magnitude;
221
222 // If we are about to shrink virtual space below zero, then expand instead
223 if (shrink && vs.committed_size() < delta) {
224 shrink = false;
225 }
226
227 // Resizing by delta
228 if (shrink) {
229 vs.shrink_by(delta);
230 } else {
231 // If expanding fails expand_by will silently return false
232 vs.expand_by(delta, true);
233 }
234 }
235 return 0;
236 }
237
238 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
239 jlong reserved_space_size, jlong magnitude, jlong iterations))
240 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", "
241 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude,
242 iterations);
243 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
244 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
245 return 1;
246 }
247
248 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
249 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
250 if (sizeof(size_t) < sizeof(jlong)) {
251 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
252 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
253 || iterations > size_t_max_value) {
254 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
255 return 2;
256 }
257 }
258
259 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
260 (size_t) magnitude, (size_t) iterations);
261 WB_END
262
263 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
264 oop p = JNIHandles::resolve(obj);
265 #if INCLUDE_ALL_GCS
266 if (UseG1GC) {
267 G1CollectedHeap* g1 = G1CollectedHeap::heap();
268 const HeapRegion* hr = g1->heap_region_containing(p);
269 if (hr == NULL) {
270 return false;
271 }
272 return !(hr->is_young());
273 } else if (UseParallelGC) {
274 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
275 return !psh->is_in_young(p);
276 }
277 #endif // INCLUDE_ALL_GCS
278 GenCollectedHeap* gch = GenCollectedHeap::heap();
279 return !gch->is_in_young(p);
280 WB_END
281
282 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
283 oop p = JNIHandles::resolve(obj);
284 return p->size() * HeapWordSize;
285 WB_END
286
287 #if INCLUDE_ALL_GCS
288 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
289 G1CollectedHeap* g1 = G1CollectedHeap::heap();
290 oop result = JNIHandles::resolve(obj);
291 const HeapRegion* hr = g1->heap_region_containing(result);
292 return hr->is_humongous();
293 WB_END
294
295 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
296 G1CollectedHeap* g1 = G1CollectedHeap::heap();
297 size_t nr = g1->num_free_regions();
298 return (jlong)nr;
299 WB_END
300
301 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
302 G1CollectedHeap* g1 = G1CollectedHeap::heap();
303 ConcurrentMark* cm = g1->concurrent_mark();
304 return cm->concurrent_marking_in_progress();
305 WB_END
306
307 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
308 return (jint)HeapRegion::GrainBytes;
309 WB_END
310 #endif // INCLUDE_ALL_GCS
311
312 #if INCLUDE_NMT
313 // Alloc memory using the test memory type so that we can use that to see if
314 // NMT picks it up correctly
315 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
316 jlong addr = 0;
317 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
318 return addr;
319 WB_END
320
321 // Alloc memory with pseudo call stack. The test can create psudo malloc
322 // allocation site to stress the malloc tracking.
323 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
324 address pc = (address)(size_t)pseudo_stack;
325 NativeCallStack stack(&pc, 1);
326 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
327 WB_END
328
329 // Free the memory allocated by NMTAllocTest
330 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
331 os::free((void*)(uintptr_t)mem);
332 WB_END
333
334 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
335 jlong addr = 0;
336
337 addr = (jlong)(uintptr_t)os::reserve_memory(size);
338 MemTracker::record_virtual_memory_type((address)addr, mtTest);
339
340 return addr;
341 WB_END
342
343 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
344 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
345 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
346 WB_END
347
348 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
349 os::uncommit_memory((char *)(uintptr_t)addr, size);
350 WB_END
351
352 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
353 os::release_memory((char *)(uintptr_t)addr, size);
354 WB_END
355
356 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env))
357 return MemTracker::tracking_level() == NMT_detail;
358 WB_END
359
360 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
361 // Test that we can downgrade NMT levels but not upgrade them.
362 if (MemTracker::tracking_level() == NMT_off) {
363 MemTracker::transition_to(NMT_off);
364 return MemTracker::tracking_level() == NMT_off;
365 } else {
366 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
367 MemTracker::transition_to(NMT_summary);
368 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
369
370 // Can't go to detail once NMT is set to summary.
371 MemTracker::transition_to(NMT_detail);
372 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
373
374 // Shutdown sets tracking level to minimal.
375 MemTracker::shutdown();
376 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
377
378 // Once the tracking level is minimal, we cannot increase to summary.
379 // The code ignores this request instead of asserting because if the malloc site
380 // table overflows in another thread, it tries to change the code to summary.
381 MemTracker::transition_to(NMT_summary);
382 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
383
384 // Really can never go up to detail, verify that the code would never do this.
385 MemTracker::transition_to(NMT_detail);
386 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
387 return MemTracker::tracking_level() == NMT_minimal;
388 }
389 WB_END
390
391 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
392 int hash_size = MallocSiteTable::hash_buckets();
393 assert(hash_size > 0, "NMT hash_size should be > 0");
394 return (jint)hash_size;
395 WB_END
396 #endif // INCLUDE_NMT
397
398 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
399 assert(method != NULL, "method should not be null");
400 ThreadToNativeFromVM ttn(thread);
401 return env->FromReflectedMethod(method);
402 }
403
404 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
405 MutexLockerEx mu(Compile_lock);
406 CodeCache::mark_all_nmethods_for_deoptimization();
407 VM_Deoptimize op;
408 VMThread::execute(&op);
409 WB_END
410
411 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
412 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
413 int result = 0;
414 CHECK_JNI_EXCEPTION_(env, result);
415 MutexLockerEx mu(Compile_lock);
416 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
417 if (is_osr) {
418 result += mh->mark_osr_nmethods();
419 } else if (mh->code() != NULL) {
420 mh->code()->mark_for_deoptimization();
421 ++result;
422 }
423 result += CodeCache::mark_for_deoptimization(mh());
424 if (result > 0) {
425 VM_Deoptimize op;
426 VMThread::execute(&op);
427 }
428 return result;
429 WB_END
430
431 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
432 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
433 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
434 MutexLockerEx mu(Compile_lock);
435 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
436 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
437 if (code == NULL) {
438 return JNI_FALSE;
439 }
440 return (code->is_alive() && !code->is_marked_for_deoptimization());
441 WB_END
442
443 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
444 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
445 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
446 MutexLockerEx mu(Compile_lock);
447 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
448 if (is_osr) {
449 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
450 } else {
451 return CompilationPolicy::can_be_compiled(mh, comp_level);
452 }
453 WB_END
454
455 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
456 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
457 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
458 MutexLockerEx mu(Compile_lock);
459 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
460 return mh->queued_for_compilation();
461 WB_END
462
463 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
464 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
465 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
466 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
467 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
468 return (code != NULL ? code->comp_level() : CompLevel_none);
469 WB_END
470
471 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
472 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
473 CHECK_JNI_EXCEPTION(env);
474 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
475 if (is_osr) {
476 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
477 } else {
478 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
479 }
480 WB_END
481
482 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
483 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
484 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
485 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
486 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
487 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
488 WB_END
489
490 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
491 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
492 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
493 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
494 bool result = mh->dont_inline();
495 mh->set_dont_inline(value == JNI_TRUE);
496 return result;
497 WB_END
498
499 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
500 if (comp_level == CompLevel_any) {
501 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
502 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
503 } else {
504 return CompileBroker::queue_size(comp_level);
505 }
506 WB_END
507
508 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
509 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
510 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
511 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
512 bool result = mh->force_inline();
513 mh->set_force_inline(value == JNI_TRUE);
514 return result;
515 WB_END
516
517 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
518 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
519 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
520 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
521 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
522 MutexLockerEx mu(Compile_lock);
523 return (mh->queued_for_compilation() || nm != NULL);
524 WB_END
525
526 class VM_WhiteBoxOperation : public VM_Operation {
527 public:
528 VM_WhiteBoxOperation() { }
529 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
530 bool allow_nested_vm_operations() const { return true; }
531 };
532
533 class AlwaysFalseClosure : public BoolObjectClosure {
534 public:
535 bool do_object_b(oop p) { return false; }
536 };
537
538 static AlwaysFalseClosure always_false;
539
540 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
541 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
542 CHECK_JNI_EXCEPTION(env);
543 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
544 MutexLockerEx mu(Compile_lock);
545 MethodData* mdo = mh->method_data();
546 MethodCounters* mcs = mh->method_counters();
547
548 if (mdo != NULL) {
549 mdo->init();
550 ResourceMark rm;
551 int arg_count = mdo->method()->size_of_parameters();
552 for (int i = 0; i < arg_count; i++) {
553 mdo->set_arg_modified(i, 0);
554 }
555 MutexLockerEx mu(mdo->extra_data_lock());
556 mdo->clean_method_data(&always_false);
557 }
558
559 mh->clear_not_c1_compilable();
560 mh->clear_not_c2_compilable();
561 mh->clear_not_c2_osr_compilable();
562 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
563 if (mcs != NULL) {
564 mcs->backedge_counter()->init();
565 mcs->invocation_counter()->init();
566 mcs->set_interpreter_invocation_count(0);
567 mcs->set_interpreter_throwout_count(0);
568
569 #ifdef TIERED
570 mcs->set_rate(0.0F);
571 mh->set_prev_event_count(0);
572 mh->set_prev_time(0);
573 #endif
574 }
575 WB_END
576
577 template <typename T>
578 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) {
579 if (name == NULL) {
580 return false;
581 }
582 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
583 const char* flag_name = env->GetStringUTFChars(name, NULL);
584 bool result = (*TAt)(flag_name, value, true, true);
585 env->ReleaseStringUTFChars(name, flag_name);
586 return result;
587 }
588
589 template <typename T>
590 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) {
591 if (name == NULL) {
592 return false;
593 }
594 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
595 const char* flag_name = env->GetStringUTFChars(name, NULL);
596 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
597 env->ReleaseStringUTFChars(name, flag_name);
598 return result;
599 }
600
601 template <typename T>
602 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
603 ResourceMark rm(thread);
604 jclass clazz = env->FindClass(name->as_C_string());
605 CHECK_JNI_EXCEPTION_(env, NULL);
606 jmethodID methodID = env->GetStaticMethodID(clazz,
607 vmSymbols::valueOf_name()->as_C_string(),
608 sig->as_C_string());
609 CHECK_JNI_EXCEPTION_(env, NULL);
610 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
611 CHECK_JNI_EXCEPTION_(env, NULL);
612 return result;
613 }
614
615 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
616 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
617 }
618 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
619 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
620 }
621 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
622 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
623 }
624 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
625 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
626 }*/
627 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
628 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
629 }
630
631 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
632 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
633 const char* flag_name = env->GetStringUTFChars(name, NULL);
634 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
635 env->ReleaseStringUTFChars(name, flag_name);
636 return result;
637 }
638
639 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
640 Flag* flag = getVMFlag(thread, env, name);
641 return (flag != NULL) && flag->is_constant_in_binary();
642 WB_END
643
644 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
645 Flag* flag = getVMFlag(thread, env, name);
646 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
647 WB_END
648
649 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
650 bool result;
651 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
652 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
653 return booleanBox(thread, env, result);
654 }
655 return NULL;
656 WB_END
657
658 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
659 intx result;
660 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
661 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
662 return longBox(thread, env, result);
663 }
664 return NULL;
665 WB_END
666
667 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
668 uintx result;
669 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
670 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
671 return longBox(thread, env, result);
672 }
673 return NULL;
674 WB_END
675
676 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
677 uint64_t result;
678 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
679 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
680 return longBox(thread, env, result);
681 }
682 return NULL;
683 WB_END
684
685 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
686 uintx result;
687 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
688 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
689 return longBox(thread, env, result);
690 }
691 return NULL;
692 WB_END
693
694 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
695 double result;
696 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
697 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
698 return doubleBox(thread, env, result);
699 }
700 return NULL;
701 WB_END
702
703 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
704 ccstr ccstrResult;
705 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
706 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
707 jstring result = env->NewStringUTF(ccstrResult);
708 CHECK_JNI_EXCEPTION_(env, NULL);
709 return result;
710 }
711 return NULL;
712 WB_END
713
714 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
715 bool result = value == JNI_TRUE ? true : false;
716 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
717 WB_END
718
719 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
720 intx result = value;
721 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
722 WB_END
723
724 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
725 uintx result = value;
726 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
727 WB_END
728
729 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
730 uint64_t result = value;
731 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
732 WB_END
733
734 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
735 size_t result = value;
736 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
737 WB_END
738
739 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
740 double result = value;
741 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
742 WB_END
743
744 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
745 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
746 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
747 ccstr ccstrResult = ccstrValue;
748 bool needFree;
749 {
750 ThreadInVMfromNative ttvfn(thread); // back to VM
751 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
752 }
753 if (value != NULL) {
754 env->ReleaseStringUTFChars(value, ccstrValue);
755 }
756 if (needFree) {
757 FREE_C_HEAP_ARRAY(char, ccstrResult);
758 }
759 WB_END
760
761
762 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
763 WhiteBox::compilation_locked = true;
764 WB_END
765
766 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
767 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
768 WhiteBox::compilation_locked = false;
769 mo.notify_all();
770 WB_END
771
772 void WhiteBox::force_sweep() {
773 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
774 {
775 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
776 NMethodSweeper::_should_sweep = true;
777 }
778 NMethodSweeper::possibly_sweep();
779 }
780
781 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
782 WhiteBox::force_sweep();
783 WB_END
784
785 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
786 ResourceMark rm(THREAD);
787 int len;
788 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
789 return (StringTable::lookup(name, len) != NULL);
790 WB_END
791
792 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
793 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
794 Universe::heap()->collect(GCCause::_last_ditch_collection);
795 #if INCLUDE_ALL_GCS
796 if (UseG1GC) {
797 // Needs to be cleared explicitly for G1
798 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
799 }
800 #endif // INCLUDE_ALL_GCS
801 WB_END
802
803 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
804 Universe::heap()->collect(GCCause::_wb_young_gc);
805 WB_END
806
807 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
808 // static+volatile in order to force the read to happen
809 // (not be eliminated by the compiler)
810 static char c;
811 static volatile char* p;
812
813 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
814 if (p == NULL) {
815 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
816 }
817
818 c = *p;
819 WB_END
820
821 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
822 const char* cpu_features = VM_Version::cpu_features();
823 ThreadToNativeFromVM ttn(thread);
824 jstring features_string = env->NewStringUTF(cpu_features);
825
826 CHECK_JNI_EXCEPTION_(env, NULL);
827
828 return features_string;
829 WB_END
830
831 int WhiteBox::get_blob_type(const CodeBlob* code) {
832 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
833 return CodeCache::get_code_heap(code)->code_blob_type();
834 }
835
836 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
837 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
838 return CodeCache::get_code_heap(blob_type);
839 }
840
841 struct CodeBlobStub {
842 CodeBlobStub(const CodeBlob* blob) :
843 name(os::strdup(blob->name())),
844 size(blob->size()),
845 blob_type(WhiteBox::get_blob_type(blob)) { }
846 ~CodeBlobStub() { os::free((void*) name); }
847 const char* const name;
848 const int size;
849 const int blob_type;
850 };
851
852 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
853 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
854 CHECK_JNI_EXCEPTION_(env, NULL);
855 jobjectArray result = env->NewObjectArray(3, clazz, NULL);
856
857 jstring name = env->NewStringUTF(cb->name);
858 CHECK_JNI_EXCEPTION_(env, NULL);
859 env->SetObjectArrayElement(result, 0, name);
860
861 jobject obj = integerBox(thread, env, cb->size);
862 CHECK_JNI_EXCEPTION_(env, NULL);
863 env->SetObjectArrayElement(result, 1, obj);
864
865 obj = integerBox(thread, env, cb->blob_type);
866 CHECK_JNI_EXCEPTION_(env, NULL);
867 env->SetObjectArrayElement(result, 2, obj);
868
869 return result;
870 }
871
872 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
873 ResourceMark rm(THREAD);
874 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
875 CHECK_JNI_EXCEPTION_(env, NULL);
876 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
877 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
878 jobjectArray result = NULL;
879 if (code == NULL) {
880 return result;
881 }
882 int insts_size = code->insts_size();
883
884 ThreadToNativeFromVM ttn(thread);
885 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
886 CHECK_JNI_EXCEPTION_(env, NULL);
887 result = env->NewObjectArray(4, clazz, NULL);
888 if (result == NULL) {
889 return result;
890 }
891
892 CodeBlobStub stub(code);
893 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
894 env->SetObjectArrayElement(result, 0, codeBlob);
895
896 jobject level = integerBox(thread, env, code->comp_level());
897 CHECK_JNI_EXCEPTION_(env, NULL);
898 env->SetObjectArrayElement(result, 1, level);
899
900 jbyteArray insts = env->NewByteArray(insts_size);
901 CHECK_JNI_EXCEPTION_(env, NULL);
902 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
903 env->SetObjectArrayElement(result, 2, insts);
904
905 jobject id = integerBox(thread, env, code->compile_id());
906 CHECK_JNI_EXCEPTION_(env, NULL);
907 env->SetObjectArrayElement(result, 3, id);
908
909 return result;
910 WB_END
911
912 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
913 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled");
914 BufferBlob* blob;
915 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
916 if (full_size < size) {
917 full_size += round_to(size - full_size, oopSize);
918 }
919 {
920 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
921 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
922 }
923 // Track memory usage statistic after releasing CodeCache_lock
924 MemoryService::track_code_cache_memory_usage();
925 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
926 return blob;
927 }
928
929 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
930 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
931 WB_END
932
933 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
934 BufferBlob::free((BufferBlob*) addr);
935 WB_END
936
937 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
938 ResourceMark rm;
939 GrowableArray<CodeBlobStub*> blobs;
940 {
941 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
942 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
943 if (heap == NULL) {
944 return NULL;
945 }
946 for (CodeBlob* cb = (CodeBlob*) heap->first();
947 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
948 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
949 new (stub) CodeBlobStub(cb);
950 blobs.append(stub);
951 }
952 }
953 if (blobs.length() == 0) {
954 return NULL;
955 }
956 ThreadToNativeFromVM ttn(thread);
957 jobjectArray result = NULL;
958 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
959 CHECK_JNI_EXCEPTION_(env, NULL);
960 result = env->NewObjectArray(blobs.length(), clazz, NULL);
961 if (result == NULL) {
962 return result;
963 }
964 int i = 0;
965 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
966 it != blobs.end(); ++it) {
967 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
968 env->SetObjectArrayElement(result, i, obj);
969 ++i;
970 }
971 return result;
972 WB_END
973
974 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
975 return (jlong) Thread::current()->stack_size();
976 WB_END
977
978 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
979 JavaThread* t = JavaThread::current();
980 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size();
981 WB_END
982
983 int WhiteBox::array_bytes_to_length(size_t bytes) {
984 return Array<u1>::bytes_to_length(bytes);
985 }
986
987 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
988 if (size < 0) {
989 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
990 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
991 }
992
993 oop class_loader_oop = JNIHandles::resolve(class_loader);
994 ClassLoaderData* cld = class_loader_oop != NULL
995 ? java_lang_ClassLoader::loader_data(class_loader_oop)
996 : ClassLoaderData::the_null_class_loader_data();
997
998 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
999
1000 return (jlong)(uintptr_t)metadata;
1001 WB_END
1002
1003 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
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 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1010 WB_END
1011
1012 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1013 if (inc < 0) {
1014 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1015 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1016 }
1017
1018 jlong max_size_t = (jlong) ((size_t) -1);
1019 if (inc > max_size_t) {
1020 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1021 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1022 }
1023
1024 size_t new_cap_until_GC = 0;
1025 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1026 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1027 if (!success) {
1028 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1029 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1030 "due to contention with another thread");
1031 }
1032 return (jlong) new_cap_until_GC;
1033 WB_END
1034
1035 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1036 return (jlong) MetaspaceGC::capacity_until_GC();
1037 WB_END
1038
1039 //Some convenience methods to deal with objects from java
1040 int WhiteBox::offset_for_field(const char* field_name, oop object,
1041 Symbol* signature_symbol) {
1042 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1043 Thread* THREAD = Thread::current();
1044
1045 //Get the class of our object
1046 Klass* arg_klass = object->klass();
1047 //Turn it into an instance-klass
1048 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1049
1050 //Create symbols to look for in the class
1051 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1052 THREAD);
1053
1054 //To be filled in with an offset of the field we're looking for
1055 fieldDescriptor fd;
1056
1057 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1058 if (res == NULL) {
1059 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1060 name_symbol->as_C_string());
1061 fatal("Invalid layout of preloaded class");
1062 }
1063
1064 //fetch the field at the offset we've found
1065 int dest_offset = fd.offset();
1066
1067 return dest_offset;
1068 }
1069
1070
1071 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1072 int offset = offset_for_field(field_name, object,
1073 vmSymbols::string_signature());
1074 oop string = object->obj_field(offset);
1075 if (string == NULL) {
1076 return NULL;
1077 }
1078 const char* ret = java_lang_String::as_utf8_string(string);
1079 return ret;
1080 }
1081
1082 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1083 int offset =
1084 offset_for_field(field_name, object, vmSymbols::bool_signature());
1085 bool ret = (object->bool_field(offset) == JNI_TRUE);
1086 return ret;
1087 }
1088
1089 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1090 ResourceMark rm;
1091 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1092
1093 // one by one registration natives for exception catching
1094 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1095 CHECK_JNI_EXCEPTION(env);
1096 for (int i = 0, n = method_count; i < n; ++i) {
1097 // Skip dummy entries
1098 if (method_array[i].fnPtr == NULL) continue;
1099 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1100 jthrowable throwable_obj = env->ExceptionOccurred();
1101 if (throwable_obj != NULL) {
1102 env->ExceptionClear();
1103 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1104 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1105 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1106 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1107 method_array[i].name, method_array[i].signature);
1108 }
1109 } else {
1110 // Registration failed unexpectedly.
1111 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1112 method_array[i].name, method_array[i].signature);
1113 env->UnregisterNatives(wbclass);
1114 break;
1115 }
1116 }
1117 }
1118 }
1119
1120 #define CC (char*)
1121
1122 static JNINativeMethod methods[] = {
1123 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1124 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1125 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1126 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1127 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1128 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1129 {CC"parseCommandLine",
1130 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1131 (void*) &WB_ParseCommandLine
1132 },
1133 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V",
1134 (void*)&WB_AddToBootstrapClassLoaderSearch},
1135 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V",
1136 (void*)&WB_AddToSystemClassLoaderSearch},
1137 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1138 (void*)&WB_GetCompressedOopsMaxHeapSize},
1139 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1140 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1141 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1142 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1143 #if INCLUDE_ALL_GCS
1144 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1145 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1146 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1147 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1148 #endif // INCLUDE_ALL_GCS
1149 #if INCLUDE_NMT
1150 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1151 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1152 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1153 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1154 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1155 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1156 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1157 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported},
1158 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1159 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1160 #endif // INCLUDE_NMT
1161 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1162 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I",
1163 (void*)&WB_DeoptimizeMethod },
1164 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z",
1165 (void*)&WB_IsMethodCompiled },
1166 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1167 (void*)&WB_IsMethodCompilable},
1168 {CC"isMethodQueuedForCompilation",
1169 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1170 {CC"makeMethodNotCompilable",
1171 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1172 {CC"testSetDontInlineMethod",
1173 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1174 {CC"getMethodCompilationLevel",
1175 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1176 {CC"getMethodEntryBci",
1177 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1178 {CC"getCompileQueueSize",
1179 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1180 {CC"testSetForceInlineMethod",
1181 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1182 {CC"enqueueMethodForCompilation",
1183 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1184 {CC"clearMethodState",
1185 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1186 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1187 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1188 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1189 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1190 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1191 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1192 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1193 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1194 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1195 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1196 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1197 (void*)&WB_SetStringVMFlag},
1198 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1199 (void*)&WB_GetBooleanVMFlag},
1200 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1201 (void*)&WB_GetIntxVMFlag},
1202 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1203 (void*)&WB_GetUintxVMFlag},
1204 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1205 (void*)&WB_GetUint64VMFlag},
1206 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1207 (void*)&WB_GetSizeTVMFlag},
1208 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1209 (void*)&WB_GetDoubleVMFlag},
1210 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1211 (void*)&WB_GetStringVMFlag},
1212 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1213 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1214 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1215 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1216 {CC"allocateMetaspace",
1217 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1218 {CC"freeMetaspace",
1219 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1220 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1221 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1222 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1223 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1224 (void*)&WB_GetNMethod },
1225 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
1226 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1227 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1228 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1229 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1230 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1231 };
1232
1233 #undef CC
1234
1235 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1236 {
1237 if (WhiteBoxAPI) {
1238 // Make sure that wbclass is loaded by the null classloader
1239 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1240 Handle loader(ikh->class_loader());
1241 if (loader.is_null()) {
1242 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1243 WhiteBox::register_extended(env, wbclass, thread);
1244 WhiteBox::set_used();
1245 }
1246 }
1247 }
1248 JVM_END