1 /*
2 * Copyright (c) 2012, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26
27 #include <new>
28
29 #include "classfile/classLoaderData.hpp"
30 #include "classfile/modules.hpp"
31 #include "classfile/stringTable.hpp"
32 #include "code/codeCache.hpp"
33 #include "compiler/methodMatcher.hpp"
34 #include "compiler/directivesParser.hpp"
35 #include "jvmtifiles/jvmtiEnv.hpp"
36 #include "memory/metadataFactory.hpp"
37 #include "memory/metaspaceShared.hpp"
38 #include "memory/iterator.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "memory/universe.hpp"
41 #include "oops/constantPool.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "prims/wbtestmethods/parserTests.hpp"
44 #include "prims/whitebox.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/compilationPolicy.hpp"
47 #include "runtime/deoptimization.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/os.hpp"
51 #include "runtime/sweeper.hpp"
52 #include "runtime/thread.hpp"
53 #include "runtime/vm_version.hpp"
54 #include "utilities/array.hpp"
55 #include "utilities/debug.hpp"
56 #include "utilities/exceptions.hpp"
57 #include "utilities/macros.hpp"
58 #if INCLUDE_ALL_GCS
59 #include "gc/g1/concurrentMarkThread.hpp"
60 #include "gc/g1/g1CollectedHeap.inline.hpp"
61 #include "gc/g1/g1ConcurrentMark.hpp"
62 #include "gc/g1/heapRegionRemSet.hpp"
63 #include "gc/parallel/parallelScavengeHeap.inline.hpp"
64 #include "gc/parallel/adjoiningGenerations.hpp"
65 #endif // INCLUDE_ALL_GCS
66 #if INCLUDE_NMT
67 #include "services/mallocSiteTable.hpp"
68 #include "services/memTracker.hpp"
69 #include "utilities/nativeCallStack.hpp"
70 #endif // INCLUDE_NMT
71
72
73 #define SIZE_T_MAX_VALUE ((size_t) -1)
74
75 bool WhiteBox::_used = false;
76 volatile bool WhiteBox::compilation_locked = false;
77
78 class VM_WhiteBoxOperation : public VM_Operation {
79 public:
80 VM_WhiteBoxOperation() { }
81 VMOp_Type type() const { return VMOp_WhiteBoxOperation; }
82 bool allow_nested_vm_operations() const { return true; }
83 };
84
85
86 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
87 return (jlong)(void*)JNIHandles::resolve(obj);
88 WB_END
89
90 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
91 return heapOopSize;
92 WB_END
93
94 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
95 return os::vm_page_size();
96 WB_END
97
98 WB_ENTRY(jlong, WB_GetVMAllocationGranularity(JNIEnv* env, jobject o))
99 return os::vm_allocation_granularity();
100 WB_END
101
102 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
103 return os::large_page_size();
104 WB_END
105
106 class WBIsKlassAliveClosure : public KlassClosure {
107 Symbol* _name;
108 bool _found;
109 public:
110 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
111
112 void do_klass(Klass* k) {
113 if (_found) return;
114 Symbol* ksym = k->name();
115 if (ksym->fast_compare(_name) == 0) {
116 _found = true;
117 }
118 }
119
120 bool found() const {
121 return _found;
122 }
123 };
124
125 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
126 Handle h_name = JNIHandles::resolve(name);
127 if (h_name.is_null()) return false;
128 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
129 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
130
131 WBIsKlassAliveClosure closure(sym);
132 ClassLoaderDataGraph::classes_do(&closure);
133
134 return closure.found();
135 WB_END
136
137 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
138 #if INCLUDE_JVMTI
139 ResourceMark rm;
140 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
141 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
142 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg);
143 assert(err == JVMTI_ERROR_NONE, "must not fail");
144 #endif
145 }
146 WB_END
147
148 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) {
149 #if INCLUDE_JVMTI
150 ResourceMark rm;
151 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment));
152 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION);
153 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg);
154 assert(err == JVMTI_ERROR_NONE, "must not fail");
155 #endif
156 }
157 WB_END
158
159
160 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) {
161 return (jlong)Arguments::max_heap_for_compressed_oops();
162 }
163 WB_END
164
165 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) {
166 CollectorPolicy * p = Universe::heap()->collector_policy();
167 tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
168 SIZE_FORMAT " Maximum heap " SIZE_FORMAT " Space alignment " SIZE_FORMAT " Heap alignment " SIZE_FORMAT,
169 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(),
170 p->space_alignment(), p->heap_alignment());
171 }
172 WB_END
173
174 #ifndef PRODUCT
175 // Forward declaration
176 void TestReservedSpace_test();
177 void TestReserveMemorySpecial_test();
178 void TestVirtualSpace_test();
179 void TestMetaspaceAux_test();
180 #endif
181
182 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o))
183 #ifndef PRODUCT
184 TestReservedSpace_test();
185 TestReserveMemorySpecial_test();
186 TestVirtualSpace_test();
187 TestMetaspaceAux_test();
188 #endif
189 WB_END
190
191 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o))
192 size_t granularity = os::vm_allocation_granularity();
193 ReservedHeapSpace rhs(100 * granularity, granularity, false);
194 VirtualSpace vs;
195 vs.initialize(rhs, 50 * granularity);
196
197 // Check if constraints are complied
198 if (!( UseCompressedOops && rhs.base() != NULL &&
199 Universe::narrow_oop_base() != NULL &&
200 Universe::narrow_oop_use_implicit_null_checks() )) {
201 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n "
202 "\tUseCompressedOops is %d\n"
203 "\trhs.base() is " PTR_FORMAT "\n"
204 "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n"
205 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d",
206 UseCompressedOops,
207 p2i(rhs.base()),
208 p2i(Universe::narrow_oop_base()),
209 Universe::narrow_oop_use_implicit_null_checks());
210 return;
211 }
212 tty->print_cr("Reading from no access area... ");
213 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c",
214 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 ));
215 WB_END
216
217 static jint wb_stress_virtual_space_resize(size_t reserved_space_size,
218 size_t magnitude, size_t iterations) {
219 size_t granularity = os::vm_allocation_granularity();
220 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false);
221 VirtualSpace vs;
222 if (!vs.initialize(rhs, 0)) {
223 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed.");
224 return 3;
225 }
226
227 long seed = os::random();
228 tty->print_cr("Random seed is %ld", seed);
229 os::init_random(seed);
230
231 for (size_t i = 0; i < iterations; i++) {
232
233 // Whether we will shrink or grow
234 bool shrink = os::random() % 2L == 0;
235
236 // Get random delta to resize virtual space
237 size_t delta = (size_t)os::random() % magnitude;
238
239 // If we are about to shrink virtual space below zero, then expand instead
240 if (shrink && vs.committed_size() < delta) {
241 shrink = false;
242 }
243
244 // Resizing by delta
245 if (shrink) {
246 vs.shrink_by(delta);
247 } else {
248 // If expanding fails expand_by will silently return false
249 vs.expand_by(delta, true);
250 }
251 }
252 return 0;
253 }
254
255 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o,
256 jlong reserved_space_size, jlong magnitude, jlong iterations))
257 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", "
258 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude,
259 iterations);
260 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) {
261 tty->print_cr("One of variables printed above is negative. Can't proceed.\n");
262 return 1;
263 }
264
265 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is
266 // always 8 byte. That's why we should avoid overflow in case of 32bit platform.
267 if (sizeof(size_t) < sizeof(jlong)) {
268 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE;
269 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value
270 || iterations > size_t_max_value) {
271 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n");
272 return 2;
273 }
274 }
275
276 return wb_stress_virtual_space_resize((size_t) reserved_space_size,
277 (size_t) magnitude, (size_t) iterations);
278 WB_END
279
280 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj))
281 oop p = JNIHandles::resolve(obj);
282 #if INCLUDE_ALL_GCS
283 if (UseG1GC) {
284 G1CollectedHeap* g1 = G1CollectedHeap::heap();
285 const HeapRegion* hr = g1->heap_region_containing(p);
286 if (hr == NULL) {
287 return false;
288 }
289 return !(hr->is_young());
290 } else if (UseParallelGC) {
291 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap();
292 return !psh->is_in_young(p);
293 }
294 #endif // INCLUDE_ALL_GCS
295 GenCollectedHeap* gch = GenCollectedHeap::heap();
296 return !gch->is_in_young(p);
297 WB_END
298
299 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj))
300 oop p = JNIHandles::resolve(obj);
301 return p->size() * HeapWordSize;
302 WB_END
303
304 WB_ENTRY(jlong, WB_GetHeapSpaceAlignment(JNIEnv* env, jobject o))
305 size_t alignment = Universe::heap()->collector_policy()->space_alignment();
306 return (jlong)alignment;
307 WB_END
308
309 #if INCLUDE_ALL_GCS
310 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
311 G1CollectedHeap* g1 = G1CollectedHeap::heap();
312 oop result = JNIHandles::resolve(obj);
313 const HeapRegion* hr = g1->heap_region_containing(result);
314 return hr->is_humongous();
315 WB_END
316
317 WB_ENTRY(jboolean, WB_G1BelongsToHumongousRegion(JNIEnv* env, jobject o, jlong addr))
318 G1CollectedHeap* g1 = G1CollectedHeap::heap();
319 const HeapRegion* hr = g1->heap_region_containing((void*) addr);
320 return hr->is_humongous();
321 WB_END
322
323 WB_ENTRY(jboolean, WB_G1BelongsToFreeRegion(JNIEnv* env, jobject o, jlong addr))
324 G1CollectedHeap* g1 = G1CollectedHeap::heap();
325 const HeapRegion* hr = g1->heap_region_containing((void*) addr);
326 return hr->is_free();
327 WB_END
328
329 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o))
330 G1CollectedHeap* g1 = G1CollectedHeap::heap();
331 size_t nr = g1->max_regions();
332 return (jlong)nr;
333 WB_END
334
335 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
336 G1CollectedHeap* g1 = G1CollectedHeap::heap();
337 size_t nr = g1->num_free_regions();
338 return (jlong)nr;
339 WB_END
340
341 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
342 G1CollectedHeap* g1h = G1CollectedHeap::heap();
343 return g1h->concurrent_mark()->cmThread()->during_cycle();
344 WB_END
345
346 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o))
347 G1CollectedHeap* g1h = G1CollectedHeap::heap();
348 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) {
349 g1h->collect(GCCause::_wb_conc_mark);
350 return true;
351 }
352 return false;
353 WB_END
354
355 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
356 return (jint)HeapRegion::GrainBytes;
357 WB_END
358
359 WB_ENTRY(jlong, WB_PSVirtualSpaceAlignment(JNIEnv* env, jobject o))
360 ParallelScavengeHeap* ps = ParallelScavengeHeap::heap();
361 size_t alignment = ps->gens()->virtual_spaces()->alignment();
362 return (jlong)alignment;
363 WB_END
364
365 WB_ENTRY(jlong, WB_PSHeapGenerationAlignment(JNIEnv* env, jobject o))
366 size_t alignment = ParallelScavengeHeap::heap()->generation_alignment();
367 return (jlong)alignment;
368 WB_END
369
370 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env))
371 ResourceMark rm(THREAD);
372 G1CollectedHeap* g1h = G1CollectedHeap::heap();
373 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage();
374 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL);
375 return JNIHandles::make_local(env, h());
376 WB_END
377 #endif // INCLUDE_ALL_GCS
378
379 #if INCLUDE_NMT
380 // Alloc memory using the test memory type so that we can use that to see if
381 // NMT picks it up correctly
382 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size))
383 jlong addr = 0;
384 addr = (jlong)(uintptr_t)os::malloc(size, mtTest);
385 return addr;
386 WB_END
387
388 // Alloc memory with pseudo call stack. The test can create psudo malloc
389 // allocation site to stress the malloc tracking.
390 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack))
391 address pc = (address)(size_t)pseudo_stack;
392 NativeCallStack stack(&pc, 1);
393 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack);
394 WB_END
395
396 // Free the memory allocated by NMTAllocTest
397 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem))
398 os::free((void*)(uintptr_t)mem);
399 WB_END
400
401 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size))
402 jlong addr = 0;
403
404 addr = (jlong)(uintptr_t)os::reserve_memory(size);
405 MemTracker::record_virtual_memory_type((address)addr, mtTest);
406
407 return addr;
408 WB_END
409
410 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
411 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
412 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
413 WB_END
414
415 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
416 os::uncommit_memory((char *)(uintptr_t)addr, size);
417 WB_END
418
419 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
420 os::release_memory((char *)(uintptr_t)addr, size);
421 WB_END
422
423 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env))
424 // Test that we can downgrade NMT levels but not upgrade them.
425 if (MemTracker::tracking_level() == NMT_off) {
426 MemTracker::transition_to(NMT_off);
427 return MemTracker::tracking_level() == NMT_off;
428 } else {
429 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking");
430 MemTracker::transition_to(NMT_summary);
431 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now");
432
433 // Can't go to detail once NMT is set to summary.
434 MemTracker::transition_to(NMT_detail);
435 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now");
436
437 // Shutdown sets tracking level to minimal.
438 MemTracker::shutdown();
439 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now");
440
441 // Once the tracking level is minimal, we cannot increase to summary.
442 // The code ignores this request instead of asserting because if the malloc site
443 // table overflows in another thread, it tries to change the code to summary.
444 MemTracker::transition_to(NMT_summary);
445 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
446
447 // Really can never go up to detail, verify that the code would never do this.
448 MemTracker::transition_to(NMT_detail);
449 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now");
450 return MemTracker::tracking_level() == NMT_minimal;
451 }
452 WB_END
453
454 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o))
455 int hash_size = MallocSiteTable::hash_buckets();
456 assert(hash_size > 0, "NMT hash_size should be > 0");
457 return (jint)hash_size;
458 WB_END
459 #endif // INCLUDE_NMT
460
461 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
462 assert(method != NULL, "method should not be null");
463 ThreadToNativeFromVM ttn(thread);
464 return env->FromReflectedMethod(method);
465 }
466
467 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested
468 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation {
469 private:
470 int _result;
471 const bool _make_not_entrant;
472 public:
473 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) :
474 _result(0), _make_not_entrant(make_not_entrant) { }
475 int result() const { return _result; }
476
477 void doit() {
478 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) {
479 if (t->has_last_Java_frame()) {
480 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) {
481 frame* f = fst.current();
482 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) {
483 RegisterMap* reg_map = fst.register_map();
484 Deoptimization::deoptimize(t, *f, reg_map);
485 if (_make_not_entrant) {
486 nmethod* nm = CodeCache::find_nmethod(f->pc());
487 assert(nm != NULL, "sanity check");
488 nm->make_not_entrant();
489 }
490 ++_result;
491 }
492 }
493 }
494 }
495 }
496 };
497
498 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant))
499 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
500 VMThread::execute(&op);
501 return op.result();
502 WB_END
503
504 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
505 MutexLockerEx mu(Compile_lock);
506 CodeCache::mark_all_nmethods_for_deoptimization();
507 VM_Deoptimize op;
508 VMThread::execute(&op);
509 WB_END
510
511 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
512 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
513 int result = 0;
514 CHECK_JNI_EXCEPTION_(env, result);
515 MutexLockerEx mu(Compile_lock);
516 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
517 if (is_osr) {
518 result += mh->mark_osr_nmethods();
519 } else if (mh->code() != NULL) {
520 mh->code()->mark_for_deoptimization();
521 ++result;
522 }
523 result += CodeCache::mark_for_deoptimization(mh());
524 if (result > 0) {
525 VM_Deoptimize op;
526 VMThread::execute(&op);
527 }
528 return result;
529 WB_END
530
531 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
532 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
533 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
534 MutexLockerEx mu(Compile_lock);
535 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
536 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
537 if (code == NULL) {
538 return JNI_FALSE;
539 }
540 return (code->is_alive() && !code->is_marked_for_deoptimization());
541 WB_END
542
543 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
544 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
545 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
546 MutexLockerEx mu(Compile_lock);
547 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
548 if (is_osr) {
549 return CompilationPolicy::can_be_osr_compiled(mh, comp_level);
550 } else {
551 return CompilationPolicy::can_be_compiled(mh, comp_level);
552 }
553 WB_END
554
555 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
556 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
557 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
558 MutexLockerEx mu(Compile_lock);
559 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
560 return mh->queued_for_compilation();
561 WB_END
562
563 WB_ENTRY(jboolean, WB_IsIntrinsicAvailable(JNIEnv* env, jobject o, jobject method, jobject compilation_context, jint compLevel))
564 if (compLevel < CompLevel_none || compLevel > CompLevel_highest_tier) {
565 return false; // Intrinsic is not available on a non-existent compilation level.
566 }
567 jmethodID method_id, compilation_context_id;
568 method_id = reflected_method_to_jmid(thread, env, method);
569 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
570 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(method_id));
571
572 DirectiveSet* directive;
573 AbstractCompiler* comp = CompileBroker::compiler((int)compLevel);
574 if (compilation_context != NULL) {
575 compilation_context_id = reflected_method_to_jmid(thread, env, compilation_context);
576 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
577 methodHandle cch(THREAD, Method::checked_resolve_jmethod_id(compilation_context_id));
578 directive = DirectivesStack::getMatchingDirective(cch, comp);
579 } else {
580 // Calling with NULL matches default directive
581 directive = DirectivesStack::getDefaultDirective(comp);
582 }
583 bool result = CompileBroker::compiler(compLevel)->is_intrinsic_available(mh, directive);
584 DirectivesStack::release(directive);
585 return result;
586 WB_END
587
588 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
589 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
590 CHECK_JNI_EXCEPTION_(env, CompLevel_none);
591 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
592 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
593 return (code != NULL ? code->comp_level() : CompLevel_none);
594 WB_END
595
596 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr))
597 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
598 CHECK_JNI_EXCEPTION(env);
599 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
600 if (is_osr) {
601 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox");
602 } else {
603 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox");
604 }
605 WB_END
606
607 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method))
608 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
609 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci);
610 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
611 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false);
612 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci);
613 WB_END
614
615 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
616 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
617 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
618 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
619 bool result = mh->dont_inline();
620 mh->set_dont_inline(value == JNI_TRUE);
621 return result;
622 WB_END
623
624 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level))
625 if (comp_level == CompLevel_any) {
626 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
627 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
628 } else {
629 return CompileBroker::queue_size(comp_level);
630 }
631 WB_END
632
633 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
634 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
635 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
636 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
637 bool result = mh->force_inline();
638 mh->set_force_inline(value == JNI_TRUE);
639 return result;
640 WB_END
641
642 bool WhiteBox::compile_method(Method* method, int comp_level, int bci, Thread* THREAD) {
643 // Screen for unavailable/bad comp level or null method
644 if (method == NULL || comp_level > TieredStopAtLevel ||
645 CompileBroker::compiler(comp_level) == NULL) {
646 return false;
647 }
648 methodHandle mh(THREAD, method);
649 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
650 MutexLockerEx mu(Compile_lock);
651 return (mh->queued_for_compilation() || nm != NULL);
652 }
653
654 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
655 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
656 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
657 return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
658 WB_END
659
660 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
661 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
662 return WhiteBox::compile_method(ikh->class_initializer(), comp_level, InvocationEntryBci, THREAD);
663 WB_END
664
665 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
666 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
667 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
668
669 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
670 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
671 bool result = directive->PrintAssemblyOption;
672 DirectivesStack::release(directive);
673
674 return result;
675 WB_END
676
677 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
678 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
679 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
680
681 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
682
683 ResourceMark rm;
684 const char* error_msg = NULL;
685 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
686 InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
687
688 if (m == NULL) {
689 assert(error_msg != NULL, "Always have an error message");
690 tty->print_cr("Got error: %s", error_msg);
691 return -1; // Pattern failed
692 }
693
694 // Pattern works - now check if it matches
695 int result;
696 if (m->match(mh, InlineMatcher::force_inline)) {
697 result = 2; // Force inline match
698 } else if (m->match(mh, InlineMatcher::dont_inline)) {
699 result = 1; // Dont inline match
700 } else {
701 result = 0; // No match
702 }
703 delete m;
704 return result;
705 WB_END
706
707 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
708 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
709 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
710
711 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
712
713 ResourceMark rm;
714 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
715
716 const char* error_msg = NULL;
717
718 BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
719 if (m == NULL) {
720 assert(error_msg != NULL, "Must have error_msg");
721 tty->print_cr("Got error: %s", error_msg);
722 return -1;
723 }
724
725 // Pattern works - now check if it matches
726 int result = m->matches(mh);
727 delete m;
728 assert(result == 0 || result == 1, "Result out of range");
729 return result;
730 WB_END
731
732 static AlwaysFalseClosure always_false;
733
734 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
735 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
736 CHECK_JNI_EXCEPTION(env);
737 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
738 MutexLockerEx mu(Compile_lock);
739 MethodData* mdo = mh->method_data();
740 MethodCounters* mcs = mh->method_counters();
741
742 if (mdo != NULL) {
743 mdo->init();
744 ResourceMark rm;
745 int arg_count = mdo->method()->size_of_parameters();
746 for (int i = 0; i < arg_count; i++) {
747 mdo->set_arg_modified(i, 0);
748 }
749 MutexLockerEx mu(mdo->extra_data_lock());
750 mdo->clean_method_data(&always_false);
751 }
752
753 mh->clear_not_c1_compilable();
754 mh->clear_not_c2_compilable();
755 mh->clear_not_c2_osr_compilable();
756 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
757 if (mcs != NULL) {
758 mcs->backedge_counter()->init();
759 mcs->invocation_counter()->init();
760 mcs->set_interpreter_invocation_count(0);
761 mcs->set_interpreter_throwout_count(0);
762
763 #ifdef TIERED
764 mcs->set_rate(0.0F);
765 mh->set_prev_event_count(0);
766 mh->set_prev_time(0);
767 #endif
768 }
769 WB_END
770
771 template <typename T>
772 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
773 if (name == NULL) {
774 return false;
775 }
776 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
777 const char* flag_name = env->GetStringUTFChars(name, NULL);
778 Flag::Error result = (*TAt)(flag_name, value, true, true);
779 env->ReleaseStringUTFChars(name, flag_name);
780 return (result == Flag::SUCCESS);
781 }
782
783 template <typename T>
784 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
785 if (name == NULL) {
786 return false;
787 }
788 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
789 const char* flag_name = env->GetStringUTFChars(name, NULL);
790 Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
791 env->ReleaseStringUTFChars(name, flag_name);
792 return (result == Flag::SUCCESS);
793 }
794
795 template <typename T>
796 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
797 ResourceMark rm(thread);
798 jclass clazz = env->FindClass(name->as_C_string());
799 CHECK_JNI_EXCEPTION_(env, NULL);
800 jmethodID methodID = env->GetStaticMethodID(clazz,
801 vmSymbols::valueOf_name()->as_C_string(),
802 sig->as_C_string());
803 CHECK_JNI_EXCEPTION_(env, NULL);
804 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
805 CHECK_JNI_EXCEPTION_(env, NULL);
806 return result;
807 }
808
809 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
810 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
811 }
812 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
813 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
814 }
815 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
816 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
817 }
818 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
819 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
820 }*/
821 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
822 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
823 }
824
825 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
826 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
827 const char* flag_name = env->GetStringUTFChars(name, NULL);
828 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
829 env->ReleaseStringUTFChars(name, flag_name);
830 return result;
831 }
832
833 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
834 Flag* flag = getVMFlag(thread, env, name);
835 return (flag != NULL) && flag->is_constant_in_binary();
836 WB_END
837
838 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
839 Flag* flag = getVMFlag(thread, env, name);
840 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
841 WB_END
842
843 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
844 bool result;
845 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
846 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
847 return booleanBox(thread, env, result);
848 }
849 return NULL;
850 WB_END
851
852 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
853 int result;
854 if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
855 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
856 return longBox(thread, env, result);
857 }
858 return NULL;
859 WB_END
860
861 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
862 uint result;
863 if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
864 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
865 return longBox(thread, env, result);
866 }
867 return NULL;
868 WB_END
869
870 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
871 intx result;
872 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
873 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
874 return longBox(thread, env, result);
875 }
876 return NULL;
877 WB_END
878
879 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
880 uintx result;
881 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
882 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
883 return longBox(thread, env, result);
884 }
885 return NULL;
886 WB_END
887
888 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
889 uint64_t result;
890 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
891 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
892 return longBox(thread, env, result);
893 }
894 return NULL;
895 WB_END
896
897 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
898 uintx result;
899 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
900 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
901 return longBox(thread, env, result);
902 }
903 return NULL;
904 WB_END
905
906 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
907 double result;
908 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
909 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
910 return doubleBox(thread, env, result);
911 }
912 return NULL;
913 WB_END
914
915 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
916 ccstr ccstrResult;
917 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
918 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
919 jstring result = env->NewStringUTF(ccstrResult);
920 CHECK_JNI_EXCEPTION_(env, NULL);
921 return result;
922 }
923 return NULL;
924 WB_END
925
926 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
927 bool result = value == JNI_TRUE ? true : false;
928 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
929 WB_END
930
931 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
932 int result = value;
933 SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
934 WB_END
935
936 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
937 uint result = value;
938 SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
939 WB_END
940
941 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
942 intx result = value;
943 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
944 WB_END
945
946 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
947 uintx result = value;
948 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
949 WB_END
950
951 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
952 uint64_t result = value;
953 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
954 WB_END
955
956 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
957 size_t result = value;
958 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
959 WB_END
960
961 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
962 double result = value;
963 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
964 WB_END
965
966 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
967 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
968 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
969 ccstr ccstrResult = ccstrValue;
970 bool needFree;
971 {
972 ThreadInVMfromNative ttvfn(thread); // back to VM
973 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
974 }
975 if (value != NULL) {
976 env->ReleaseStringUTFChars(value, ccstrValue);
977 }
978 if (needFree) {
979 FREE_C_HEAP_ARRAY(char, ccstrResult);
980 }
981 WB_END
982
983 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
984 WhiteBox::compilation_locked = true;
985 WB_END
986
987 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
988 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
989 WhiteBox::compilation_locked = false;
990 mo.notify_all();
991 WB_END
992
993 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
994 // Force a code cache sweep and block until it finished
995 NMethodSweeper::force_sweep();
996 WB_END
997
998 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
999 ResourceMark rm(THREAD);
1000 int len;
1001 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1002 return (StringTable::lookup(name, len) != NULL);
1003 WB_END
1004
1005 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1006 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
1007 Universe::heap()->collect(GCCause::_wb_full_gc);
1008 #if INCLUDE_ALL_GCS
1009 if (UseG1GC) {
1010 // Needs to be cleared explicitly for G1
1011 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
1012 }
1013 #endif // INCLUDE_ALL_GCS
1014 WB_END
1015
1016 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1017 Universe::heap()->collect(GCCause::_wb_young_gc);
1018 WB_END
1019
1020 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1021 // static+volatile in order to force the read to happen
1022 // (not be eliminated by the compiler)
1023 static char c;
1024 static volatile char* p;
1025
1026 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1027 if (p == NULL) {
1028 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1029 }
1030
1031 c = *p;
1032 WB_END
1033
1034 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1035 const char* features = VM_Version::features_string();
1036 ThreadToNativeFromVM ttn(thread);
1037 jstring features_string = env->NewStringUTF(features);
1038
1039 CHECK_JNI_EXCEPTION_(env, NULL);
1040
1041 return features_string;
1042 WB_END
1043
1044 int WhiteBox::get_blob_type(const CodeBlob* code) {
1045 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1046 return CodeCache::get_code_heap(code)->code_blob_type();
1047 }
1048
1049 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1050 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1051 return CodeCache::get_code_heap(blob_type);
1052 }
1053
1054 struct CodeBlobStub {
1055 CodeBlobStub(const CodeBlob* blob) :
1056 name(os::strdup(blob->name())),
1057 size(blob->size()),
1058 blob_type(WhiteBox::get_blob_type(blob)),
1059 address((jlong) blob) { }
1060 ~CodeBlobStub() { os::free((void*) name); }
1061 const char* const name;
1062 const jint size;
1063 const jint blob_type;
1064 const jlong address;
1065 };
1066
1067 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1068 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1069 CHECK_JNI_EXCEPTION_(env, NULL);
1070 jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1071
1072 jstring name = env->NewStringUTF(cb->name);
1073 CHECK_JNI_EXCEPTION_(env, NULL);
1074 env->SetObjectArrayElement(result, 0, name);
1075
1076 jobject obj = integerBox(thread, env, cb->size);
1077 CHECK_JNI_EXCEPTION_(env, NULL);
1078 env->SetObjectArrayElement(result, 1, obj);
1079
1080 obj = integerBox(thread, env, cb->blob_type);
1081 CHECK_JNI_EXCEPTION_(env, NULL);
1082 env->SetObjectArrayElement(result, 2, obj);
1083
1084 obj = longBox(thread, env, cb->address);
1085 CHECK_JNI_EXCEPTION_(env, NULL);
1086 env->SetObjectArrayElement(result, 3, obj);
1087
1088 return result;
1089 }
1090
1091 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1092 ResourceMark rm(THREAD);
1093 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1094 CHECK_JNI_EXCEPTION_(env, NULL);
1095 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1096 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1097 jobjectArray result = NULL;
1098 if (code == NULL) {
1099 return result;
1100 }
1101 int insts_size = code->insts_size();
1102
1103 ThreadToNativeFromVM ttn(thread);
1104 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1105 CHECK_JNI_EXCEPTION_(env, NULL);
1106 result = env->NewObjectArray(5, clazz, NULL);
1107 if (result == NULL) {
1108 return result;
1109 }
1110
1111 CodeBlobStub stub(code);
1112 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1113 CHECK_JNI_EXCEPTION_(env, NULL);
1114 env->SetObjectArrayElement(result, 0, codeBlob);
1115
1116 jobject level = integerBox(thread, env, code->comp_level());
1117 CHECK_JNI_EXCEPTION_(env, NULL);
1118 env->SetObjectArrayElement(result, 1, level);
1119
1120 jbyteArray insts = env->NewByteArray(insts_size);
1121 CHECK_JNI_EXCEPTION_(env, NULL);
1122 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1123 env->SetObjectArrayElement(result, 2, insts);
1124
1125 jobject id = integerBox(thread, env, code->compile_id());
1126 CHECK_JNI_EXCEPTION_(env, NULL);
1127 env->SetObjectArrayElement(result, 3, id);
1128
1129 jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1130 CHECK_JNI_EXCEPTION_(env, NULL);
1131 env->SetObjectArrayElement(result, 4, entry_point);
1132
1133 return result;
1134 WB_END
1135
1136 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1137 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1138 BufferBlob* blob;
1139 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1140 if (full_size < size) {
1141 full_size += round_to(size - full_size, oopSize);
1142 }
1143 {
1144 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1145 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1146 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1147 }
1148 // Track memory usage statistic after releasing CodeCache_lock
1149 MemoryService::track_code_cache_memory_usage();
1150 return blob;
1151 }
1152
1153 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1154 if (size < 0) {
1155 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1156 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1157 }
1158 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1159 WB_END
1160
1161 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1162 if (addr == 0) {
1163 return;
1164 }
1165 BufferBlob::free((BufferBlob*) addr);
1166 WB_END
1167
1168 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1169 ResourceMark rm;
1170 GrowableArray<CodeBlobStub*> blobs;
1171 {
1172 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1173 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1174 if (heap == NULL) {
1175 return NULL;
1176 }
1177 for (CodeBlob* cb = (CodeBlob*) heap->first();
1178 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1179 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1180 new (stub) CodeBlobStub(cb);
1181 blobs.append(stub);
1182 }
1183 }
1184 if (blobs.length() == 0) {
1185 return NULL;
1186 }
1187 ThreadToNativeFromVM ttn(thread);
1188 jobjectArray result = NULL;
1189 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1190 CHECK_JNI_EXCEPTION_(env, NULL);
1191 result = env->NewObjectArray(blobs.length(), clazz, NULL);
1192 if (result == NULL) {
1193 return result;
1194 }
1195 int i = 0;
1196 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1197 it != blobs.end(); ++it) {
1198 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1199 CHECK_JNI_EXCEPTION_(env, NULL);
1200 env->SetObjectArrayElement(result, i, obj);
1201 ++i;
1202 }
1203 return result;
1204 WB_END
1205
1206 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1207 return CompileBroker::get_compilation_activity_mode();
1208 WB_END
1209
1210 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1211 if (addr == 0) {
1212 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1213 "WB_GetCodeBlob: addr is null");
1214 }
1215 ThreadToNativeFromVM ttn(thread);
1216 CodeBlobStub stub((CodeBlob*) addr);
1217 return codeBlob2objectArray(thread, env, &stub);
1218 WB_END
1219
1220 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1221 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1222 CHECK_JNI_EXCEPTION_(env, 0);
1223 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1224 return (jlong) mh->method_data();
1225 WB_END
1226
1227 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1228 return (jlong) Thread::current()->stack_size();
1229 WB_END
1230
1231 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1232 JavaThread* t = JavaThread::current();
1233 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1234 WB_END
1235
1236
1237 int WhiteBox::array_bytes_to_length(size_t bytes) {
1238 return Array<u1>::bytes_to_length(bytes);
1239 }
1240
1241 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1242 if (size < 0) {
1243 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1244 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1245 }
1246
1247 oop class_loader_oop = JNIHandles::resolve(class_loader);
1248 ClassLoaderData* cld = class_loader_oop != NULL
1249 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1250 : ClassLoaderData::the_null_class_loader_data();
1251
1252 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1253
1254 return (jlong)(uintptr_t)metadata;
1255 WB_END
1256
1257 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1258 oop class_loader_oop = JNIHandles::resolve(class_loader);
1259 ClassLoaderData* cld = class_loader_oop != NULL
1260 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1261 : ClassLoaderData::the_null_class_loader_data();
1262
1263 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1264 WB_END
1265
1266 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jstring version, jstring location,
1267 jobjectArray packages))
1268 Modules::define_module(module, version, location, packages, CHECK);
1269 WB_END
1270
1271 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1272 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1273 WB_END
1274
1275 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1276 Modules::add_module_exports_to_all_unnamed(module, package, CHECK);
1277 WB_END
1278
1279 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1280 Modules::add_module_exports(module, package, NULL, CHECK);
1281 WB_END
1282
1283 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1284 Modules::add_reads_module(from_module, source_module, CHECK);
1285 WB_END
1286
1287 WB_ENTRY(jboolean, WB_CanReadModule(JNIEnv* env, jobject o, jobject asking_module, jobject source_module))
1288 return Modules::can_read_module(asking_module, source_module, THREAD);
1289 WB_END
1290
1291 WB_ENTRY(jboolean, WB_IsExportedToModule(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1292 return Modules::is_exported_to_module(from_module, package, to_module, THREAD);
1293 WB_END
1294
1295 WB_ENTRY(void, WB_AddModulePackage(JNIEnv* env, jobject o, jclass module, jstring package))
1296 Modules::add_module_package(module, package, CHECK);
1297 WB_END
1298
1299 WB_ENTRY(jobject, WB_GetModuleByPackageName(JNIEnv* env, jobject o, jobject loader, jstring package))
1300 return Modules::get_module_by_package_name(loader, package, THREAD);
1301 WB_END
1302
1303 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1304 if (inc < 0) {
1305 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1306 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1307 }
1308
1309 jlong max_size_t = (jlong) ((size_t) -1);
1310 if (inc > max_size_t) {
1311 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1312 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1313 }
1314
1315 size_t new_cap_until_GC = 0;
1316 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1317 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1318 if (!success) {
1319 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1320 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1321 "due to contention with another thread");
1322 }
1323 return (jlong) new_cap_until_GC;
1324 WB_END
1325
1326 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1327 return (jlong) MetaspaceGC::capacity_until_GC();
1328 WB_END
1329
1330
1331 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1332 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1333 Monitor::_safepoint_check_always :
1334 Monitor::_safepoint_check_never;
1335 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1336 attemptedNoSafepointValue == JNI_TRUE);
1337 WB_END
1338
1339 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1340 oop obj_oop = JNIHandles::resolve(obj);
1341 return (jboolean) obj_oop->mark()->has_monitor();
1342 WB_END
1343
1344 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1345 VM_ForceSafepoint force_safepoint_op;
1346 VMThread::execute(&force_safepoint_op);
1347 WB_END
1348
1349 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1350 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1351 return (jlong) ikh->constants();
1352 WB_END
1353
1354 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1355 return ConstantPool::CPCACHE_INDEX_TAG;
1356 WB_END
1357
1358 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1359 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1360 ConstantPool* cp = ikh->constants();
1361 if (cp->cache() == NULL) {
1362 return -1;
1363 }
1364 return cp->cache()->length();
1365 WB_END
1366
1367 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1368 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1369 ConstantPool* cp = ikh->constants();
1370 if (cp->cache() == NULL) {
1371 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1372 }
1373 jint cpci = index;
1374 jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1375 if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1376 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1377 }
1378 jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1379 return cpi;
1380 WB_END
1381
1382 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1383 return ConstantPool::encode_invokedynamic_index(index);
1384 WB_END
1385
1386 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1387 VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1388 VMThread::execute(&clear_ics);
1389 WB_END
1390
1391 template <typename T>
1392 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1393 assert(value != NULL, "sanity");
1394 if (method == NULL || name == NULL) {
1395 return false;
1396 }
1397 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1398 CHECK_JNI_EXCEPTION_(env, false);
1399 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1400 // can't be in VM when we call JNI
1401 ThreadToNativeFromVM ttnfv(thread);
1402 const char* flag_name = env->GetStringUTFChars(name, NULL);
1403 bool result = CompilerOracle::has_option_value(mh, flag_name, *value);
1404 env->ReleaseStringUTFChars(name, flag_name);
1405 return result;
1406 }
1407
1408 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1409 bool result;
1410 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1411 // can't be in VM when we call JNI
1412 ThreadToNativeFromVM ttnfv(thread);
1413 return booleanBox(thread, env, result);
1414 }
1415 return NULL;
1416 WB_END
1417
1418 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1419 intx result;
1420 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1421 // can't be in VM when we call JNI
1422 ThreadToNativeFromVM ttnfv(thread);
1423 return longBox(thread, env, result);
1424 }
1425 return NULL;
1426 WB_END
1427
1428 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1429 uintx result;
1430 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1431 // can't be in VM when we call JNI
1432 ThreadToNativeFromVM ttnfv(thread);
1433 return longBox(thread, env, result);
1434 }
1435 return NULL;
1436 WB_END
1437
1438 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1439 double result;
1440 if (GetMethodOption <double> (thread, env, method, name, &result)) {
1441 // can't be in VM when we call JNI
1442 ThreadToNativeFromVM ttnfv(thread);
1443 return doubleBox(thread, env, result);
1444 }
1445 return NULL;
1446 WB_END
1447
1448 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1449 ccstr ccstrResult;
1450 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1451 // can't be in VM when we call JNI
1452 ThreadToNativeFromVM ttnfv(thread);
1453 jstring result = env->NewStringUTF(ccstrResult);
1454 CHECK_JNI_EXCEPTION_(env, NULL);
1455 return result;
1456 }
1457 return NULL;
1458 WB_END
1459
1460 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1461 oop obj_oop = JNIHandles::resolve(obj);
1462 return MetaspaceShared::is_in_shared_space((void*)obj_oop);
1463 WB_END
1464
1465 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1466 return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1467 WB_END
1468
1469 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1470 return StringTable::shared_string_ignored();
1471 WB_END
1472
1473 //Some convenience methods to deal with objects from java
1474 int WhiteBox::offset_for_field(const char* field_name, oop object,
1475 Symbol* signature_symbol) {
1476 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1477 Thread* THREAD = Thread::current();
1478
1479 //Get the class of our object
1480 Klass* arg_klass = object->klass();
1481 //Turn it into an instance-klass
1482 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1483
1484 //Create symbols to look for in the class
1485 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1486 THREAD);
1487
1488 //To be filled in with an offset of the field we're looking for
1489 fieldDescriptor fd;
1490
1491 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1492 if (res == NULL) {
1493 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1494 name_symbol->as_C_string());
1495 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:classload=info to see the origin of the problem class");
1496 }
1497
1498 //fetch the field at the offset we've found
1499 int dest_offset = fd.offset();
1500
1501 return dest_offset;
1502 }
1503
1504
1505 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1506 int offset = offset_for_field(field_name, object,
1507 vmSymbols::string_signature());
1508 oop string = object->obj_field(offset);
1509 if (string == NULL) {
1510 return NULL;
1511 }
1512 const char* ret = java_lang_String::as_utf8_string(string);
1513 return ret;
1514 }
1515
1516 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1517 int offset =
1518 offset_for_field(field_name, object, vmSymbols::bool_signature());
1519 bool ret = (object->bool_field(offset) == JNI_TRUE);
1520 return ret;
1521 }
1522
1523 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1524 ResourceMark rm;
1525 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1526
1527 // one by one registration natives for exception catching
1528 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1529 CHECK_JNI_EXCEPTION(env);
1530 for (int i = 0, n = method_count; i < n; ++i) {
1531 // Skip dummy entries
1532 if (method_array[i].fnPtr == NULL) continue;
1533 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1534 jthrowable throwable_obj = env->ExceptionOccurred();
1535 if (throwable_obj != NULL) {
1536 env->ExceptionClear();
1537 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1538 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1539 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1540 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1541 method_array[i].name, method_array[i].signature);
1542 }
1543 } else {
1544 // Registration failed unexpectedly.
1545 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1546 method_array[i].name, method_array[i].signature);
1547 env->UnregisterNatives(wbclass);
1548 break;
1549 }
1550 }
1551 }
1552 }
1553
1554 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
1555 // can't be in VM when we call JNI
1556 ThreadToNativeFromVM ttnfv(thread);
1557 const char* dir = env->GetStringUTFChars(compDirect, NULL);
1558 int ret;
1559 {
1560 ThreadInVMfromNative ttvfn(thread); // back to VM
1561 ret = DirectivesParser::parse_string(dir, tty);
1562 }
1563 env->ReleaseStringUTFChars(compDirect, dir);
1564 // -1 for error parsing directive. Return 0 as number of directives added.
1565 if (ret == -1) {
1566 ret = 0;
1567 }
1568 return (jint) ret;
1569 WB_END
1570
1571 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
1572 DirectivesStack::pop(count);
1573 WB_END
1574
1575 #define CC (char*)
1576
1577 static JNINativeMethod methods[] = {
1578 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1579 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1580 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1581 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1582 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1583 {CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
1584 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
1585 {CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
1586 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1587 {CC"parseCommandLine0",
1588 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1589 (void*) &WB_ParseCommandLine
1590 },
1591 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1592 (void*)&WB_AddToBootstrapClassLoaderSearch},
1593 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1594 (void*)&WB_AddToSystemClassLoaderSearch},
1595 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1596 (void*)&WB_GetCompressedOopsMaxHeapSize},
1597 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1598 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1599 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1600 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1601 #if INCLUDE_ALL_GCS
1602 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1603 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1604 {CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
1605 {CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
1606 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
1607 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1608 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1609 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1610 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1611 (void*)&WB_G1AuxiliaryMemoryUsage },
1612 {CC"psVirtualSpaceAlignment",CC"()J", (void*)&WB_PSVirtualSpaceAlignment},
1613 {CC"psHeapGenerationAlignment",CC"()J", (void*)&WB_PSHeapGenerationAlignment},
1614 #endif // INCLUDE_ALL_GCS
1615 #if INCLUDE_NMT
1616 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1617 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1618 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1619 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1620 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1621 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1622 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1623 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1624 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1625 #endif // INCLUDE_NMT
1626 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
1627 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1628 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
1629 (void*)&WB_DeoptimizeMethod },
1630 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
1631 (void*)&WB_IsMethodCompiled },
1632 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1633 (void*)&WB_IsMethodCompilable},
1634 {CC"isMethodQueuedForCompilation0",
1635 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1636 {CC"isIntrinsicAvailable0",
1637 CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1638 (void*)&WB_IsIntrinsicAvailable},
1639 {CC"makeMethodNotCompilable0",
1640 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1641 {CC"testSetDontInlineMethod0",
1642 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1643 {CC"getMethodCompilationLevel0",
1644 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1645 {CC"getMethodEntryBci0",
1646 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1647 {CC"getCompileQueueSize",
1648 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1649 {CC"testSetForceInlineMethod0",
1650 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1651 {CC"enqueueMethodForCompilation0",
1652 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1653 {CC"enqueueInitializerForCompilation0",
1654 CC"(Ljava/lang/Class;I)Z", (void*)&WB_EnqueueInitializerForCompilation},
1655 {CC"clearMethodState0",
1656 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1657 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1658 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1659 {CC"matchesMethod",
1660 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1661 (void*)&WB_MatchesMethod},
1662 {CC"matchesInline",
1663 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1664 (void*)&WB_MatchesInline},
1665 {CC"shouldPrintAssembly",
1666 CC"(Ljava/lang/reflect/Executable;I)Z",
1667 (void*)&WB_ShouldPrintAssembly},
1668
1669 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1670 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1671 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1672 {CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1673 {CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1674 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1675 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1676 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1677 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1678 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1679 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1680 (void*)&WB_SetStringVMFlag},
1681 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1682 (void*)&WB_GetBooleanVMFlag},
1683 {CC"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1684 (void*)&WB_GetIntVMFlag},
1685 {CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1686 (void*)&WB_GetUintVMFlag},
1687 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1688 (void*)&WB_GetIntxVMFlag},
1689 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1690 (void*)&WB_GetUintxVMFlag},
1691 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1692 (void*)&WB_GetUint64VMFlag},
1693 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1694 (void*)&WB_GetSizeTVMFlag},
1695 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1696 (void*)&WB_GetDoubleVMFlag},
1697 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1698 (void*)&WB_GetStringVMFlag},
1699 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1700 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1701 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1702 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1703 {CC"allocateMetaspace",
1704 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1705 {CC"freeMetaspace",
1706 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1707 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1708 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1709 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1710 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1711 (void*)&WB_GetNMethod },
1712 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
1713 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1714 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1715 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1716 {CC"getCompilationActivityMode",
1717 CC"()I", (void*)&WB_GetCompilationActivityMode},
1718 {CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
1719 (void*)&WB_GetMethodData },
1720 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1721 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1722 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1723 {CC"DefineModule", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
1724 (void*)&WB_DefineModule },
1725 {CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
1726 (void*)&WB_AddModuleExports },
1727 {CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
1728 (void*)&WB_AddReadsModule },
1729 {CC"CanReadModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)Z",
1730 (void*)&WB_CanReadModule },
1731 {CC"IsExportedToModule", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Z",
1732 (void*)&WB_IsExportedToModule },
1733 {CC"AddModulePackage", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1734 (void*)&WB_AddModulePackage },
1735 {CC"GetModuleByPackageName", CC"(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;",
1736 (void*)&WB_GetModuleByPackageName },
1737 {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1738 (void*)&WB_AddModuleExportsToAllUnnamed },
1739 {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1740 (void*)&WB_AddModuleExportsToAll },
1741 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
1742 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1743 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1744 {CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
1745 {CC"getConstantPoolCacheIndexTag0", CC"()I", (void*)&WB_GetConstantPoolCacheIndexTag},
1746 {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_GetConstantPoolCacheLength},
1747 {CC"remapInstructionOperandFromCPCache0",
1748 CC"(Ljava/lang/Class;I)I", (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
1749 {CC"encodeConstantPoolIndyIndex0",
1750 CC"(I)I", (void*)&WB_ConstantPoolEncodeIndyIndex},
1751 {CC"getMethodBooleanOption",
1752 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1753 (void*)&WB_GetMethodBooleaneOption},
1754 {CC"getMethodIntxOption",
1755 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1756 (void*)&WB_GetMethodIntxOption},
1757 {CC"getMethodUintxOption",
1758 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1759 (void*)&WB_GetMethodUintxOption},
1760 {CC"getMethodDoubleOption",
1761 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1762 (void*)&WB_GetMethodDoubleOption},
1763 {CC"getMethodStringOption",
1764 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1765 (void*)&WB_GetMethodStringOption},
1766 {CC"isShared", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
1767 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
1768 {CC"areSharedStringsIgnored", CC"()Z", (void*)&WB_AreSharedStringsIgnored },
1769 {CC"clearInlineCaches0", CC"(Z)V", (void*)&WB_ClearInlineCaches },
1770 {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
1771 (void*)&WB_AddCompilerDirective },
1772 {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
1773 };
1774
1775 #undef CC
1776
1777 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1778 {
1779 if (WhiteBoxAPI) {
1780 // Make sure that wbclass is loaded by the null classloader
1781 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1782 Handle loader(ikh->class_loader());
1783 if (loader.is_null()) {
1784 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1785 WhiteBox::register_extended(env, wbclass, thread);
1786 WhiteBox::set_used();
1787 }
1788 }
1789 }
1790 JVM_END