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 || CompileBroker::compiler(comp_level) == NULL) {
645 return false;
646 }
647 methodHandle mh(THREAD, method);
648 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), CompileBroker::Reason_Whitebox, THREAD);
649 MutexLockerEx mu(Compile_lock);
650 return (mh->queued_for_compilation() || nm != NULL);
651 }
652
653 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci))
654 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
655 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
656 return WhiteBox::compile_method(Method::checked_resolve_jmethod_id(jmid), comp_level, bci, THREAD);
657 WB_END
658
659 WB_ENTRY(jboolean, WB_EnqueueInitializerForCompilation(JNIEnv* env, jobject o, jclass klass, jint comp_level))
660 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
661 return WhiteBox::compile_method(ikh->class_initializer(), comp_level, InvocationEntryBci, THREAD);
662 WB_END
663
664 WB_ENTRY(jboolean, WB_ShouldPrintAssembly(JNIEnv* env, jobject o, jobject method, jint comp_level))
665 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
666 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
667
668 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
669 DirectiveSet* directive = DirectivesStack::getMatchingDirective(mh, CompileBroker::compiler(comp_level));
670 bool result = directive->PrintAssemblyOption;
671 DirectivesStack::release(directive);
672
673 return result;
674 WB_END
675
676 WB_ENTRY(jint, WB_MatchesInline(JNIEnv* env, jobject o, jobject method, jstring pattern))
677 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
678 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
679
680 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
681
682 ResourceMark rm;
683 const char* error_msg = NULL;
684 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
685 InlineMatcher* m = InlineMatcher::parse_inline_pattern(method_str, error_msg);
686
687 if (m == NULL) {
688 assert(error_msg != NULL, "Always have an error message");
689 tty->print_cr("Got error: %s", error_msg);
690 return -1; // Pattern failed
691 }
692
693 // Pattern works - now check if it matches
694 int result;
695 if (m->match(mh, InlineMatcher::force_inline)) {
696 result = 2; // Force inline match
697 } else if (m->match(mh, InlineMatcher::dont_inline)) {
698 result = 1; // Dont inline match
699 } else {
700 result = 0; // No match
701 }
702 delete m;
703 return result;
704 WB_END
705
706 WB_ENTRY(jint, WB_MatchesMethod(JNIEnv* env, jobject o, jobject method, jstring pattern))
707 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
708 CHECK_JNI_EXCEPTION_(env, JNI_FALSE);
709
710 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
711
712 ResourceMark rm;
713 char* method_str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(pattern));
714
715 const char* error_msg = NULL;
716
717 BasicMatcher* m = BasicMatcher::parse_method_pattern(method_str, error_msg);
718 if (m == NULL) {
719 assert(error_msg != NULL, "Must have error_msg");
720 tty->print_cr("Got error: %s", error_msg);
721 return -1;
722 }
723
724 // Pattern works - now check if it matches
725 int result = m->matches(mh);
726 delete m;
727 assert(result == 0 || result == 1, "Result out of range");
728 return result;
729 WB_END
730
731 static AlwaysFalseClosure always_false;
732
733 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
734 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
735 CHECK_JNI_EXCEPTION(env);
736 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
737 MutexLockerEx mu(Compile_lock);
738 MethodData* mdo = mh->method_data();
739 MethodCounters* mcs = mh->method_counters();
740
741 if (mdo != NULL) {
742 mdo->init();
743 ResourceMark rm;
744 int arg_count = mdo->method()->size_of_parameters();
745 for (int i = 0; i < arg_count; i++) {
746 mdo->set_arg_modified(i, 0);
747 }
748 MutexLockerEx mu(mdo->extra_data_lock());
749 mdo->clean_method_data(&always_false);
750 }
751
752 mh->clear_not_c1_compilable();
753 mh->clear_not_c2_compilable();
754 mh->clear_not_c2_osr_compilable();
755 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
756 if (mcs != NULL) {
757 mcs->backedge_counter()->init();
758 mcs->invocation_counter()->init();
759 mcs->set_interpreter_invocation_count(0);
760 mcs->set_interpreter_throwout_count(0);
761
762 #ifdef TIERED
763 mcs->set_rate(0.0F);
764 mh->set_prev_event_count(0);
765 mh->set_prev_time(0);
766 #endif
767 }
768 WB_END
769
770 template <typename T>
771 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAt)(const char*, T*, bool, bool)) {
772 if (name == NULL) {
773 return false;
774 }
775 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
776 const char* flag_name = env->GetStringUTFChars(name, NULL);
777 Flag::Error result = (*TAt)(flag_name, value, true, true);
778 env->ReleaseStringUTFChars(name, flag_name);
779 return (result == Flag::SUCCESS);
780 }
781
782 template <typename T>
783 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, Flag::Error (*TAtPut)(const char*, T*, Flag::Flags)) {
784 if (name == NULL) {
785 return false;
786 }
787 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
788 const char* flag_name = env->GetStringUTFChars(name, NULL);
789 Flag::Error result = (*TAtPut)(flag_name, value, Flag::INTERNAL);
790 env->ReleaseStringUTFChars(name, flag_name);
791 return (result == Flag::SUCCESS);
792 }
793
794 template <typename T>
795 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) {
796 ResourceMark rm(thread);
797 jclass clazz = env->FindClass(name->as_C_string());
798 CHECK_JNI_EXCEPTION_(env, NULL);
799 jmethodID methodID = env->GetStaticMethodID(clazz,
800 vmSymbols::valueOf_name()->as_C_string(),
801 sig->as_C_string());
802 CHECK_JNI_EXCEPTION_(env, NULL);
803 jobject result = env->CallStaticObjectMethod(clazz, methodID, value);
804 CHECK_JNI_EXCEPTION_(env, NULL);
805 return result;
806 }
807
808 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) {
809 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value);
810 }
811 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) {
812 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value);
813 }
814 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) {
815 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value);
816 }
817 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) {
818 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value);
819 }*/
820 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) {
821 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value);
822 }
823
824 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) {
825 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
826 const char* flag_name = env->GetStringUTFChars(name, NULL);
827 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true);
828 env->ReleaseStringUTFChars(name, flag_name);
829 return result;
830 }
831
832 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name))
833 Flag* flag = getVMFlag(thread, env, name);
834 return (flag != NULL) && flag->is_constant_in_binary();
835 WB_END
836
837 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name))
838 Flag* flag = getVMFlag(thread, env, name);
839 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker());
840 WB_END
841
842 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name))
843 bool result;
844 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) {
845 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
846 return booleanBox(thread, env, result);
847 }
848 return NULL;
849 WB_END
850
851 WB_ENTRY(jobject, WB_GetIntVMFlag(JNIEnv* env, jobject o, jstring name))
852 int result;
853 if (GetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAt)) {
854 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
855 return longBox(thread, env, result);
856 }
857 return NULL;
858 WB_END
859
860 WB_ENTRY(jobject, WB_GetUintVMFlag(JNIEnv* env, jobject o, jstring name))
861 uint result;
862 if (GetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAt)) {
863 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
864 return longBox(thread, env, result);
865 }
866 return NULL;
867 WB_END
868
869 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name))
870 intx result;
871 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) {
872 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
873 return longBox(thread, env, result);
874 }
875 return NULL;
876 WB_END
877
878 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name))
879 uintx result;
880 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) {
881 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
882 return longBox(thread, env, result);
883 }
884 return NULL;
885 WB_END
886
887 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name))
888 uint64_t result;
889 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) {
890 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
891 return longBox(thread, env, result);
892 }
893 return NULL;
894 WB_END
895
896 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name))
897 uintx result;
898 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) {
899 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
900 return longBox(thread, env, result);
901 }
902 return NULL;
903 WB_END
904
905 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name))
906 double result;
907 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) {
908 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
909 return doubleBox(thread, env, result);
910 }
911 return NULL;
912 WB_END
913
914 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name))
915 ccstr ccstrResult;
916 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) {
917 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
918 jstring result = env->NewStringUTF(ccstrResult);
919 CHECK_JNI_EXCEPTION_(env, NULL);
920 return result;
921 }
922 return NULL;
923 WB_END
924
925 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value))
926 bool result = value == JNI_TRUE ? true : false;
927 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut);
928 WB_END
929
930 WB_ENTRY(void, WB_SetIntVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
931 int result = value;
932 SetVMFlag <int> (thread, env, name, &result, &CommandLineFlags::intAtPut);
933 WB_END
934
935 WB_ENTRY(void, WB_SetUintVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
936 uint result = value;
937 SetVMFlag <uint> (thread, env, name, &result, &CommandLineFlags::uintAtPut);
938 WB_END
939
940 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
941 intx result = value;
942 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut);
943 WB_END
944
945 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
946 uintx result = value;
947 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut);
948 WB_END
949
950 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
951 uint64_t result = value;
952 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut);
953 WB_END
954
955 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value))
956 size_t result = value;
957 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut);
958 WB_END
959
960 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value))
961 double result = value;
962 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut);
963 WB_END
964
965 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value))
966 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
967 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL);
968 ccstr ccstrResult = ccstrValue;
969 bool needFree;
970 {
971 ThreadInVMfromNative ttvfn(thread); // back to VM
972 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut);
973 }
974 if (value != NULL) {
975 env->ReleaseStringUTFChars(value, ccstrValue);
976 }
977 if (needFree) {
978 FREE_C_HEAP_ARRAY(char, ccstrResult);
979 }
980 WB_END
981
982 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout))
983 WhiteBox::compilation_locked = true;
984 WB_END
985
986 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o))
987 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag);
988 WhiteBox::compilation_locked = false;
989 mo.notify_all();
990 WB_END
991
992 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o))
993 // Force a code cache sweep and block until it finished
994 NMethodSweeper::force_sweep();
995 WB_END
996
997 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
998 ResourceMark rm(THREAD);
999 int len;
1000 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false);
1001 return (StringTable::lookup(name, len) != NULL);
1002 WB_END
1003
1004 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
1005 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
1006 Universe::heap()->collect(GCCause::_wb_full_gc);
1007 #if INCLUDE_ALL_GCS
1008 if (UseG1GC) {
1009 // Needs to be cleared explicitly for G1
1010 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false);
1011 }
1012 #endif // INCLUDE_ALL_GCS
1013 WB_END
1014
1015 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o))
1016 Universe::heap()->collect(GCCause::_wb_young_gc);
1017 WB_END
1018
1019 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o))
1020 // static+volatile in order to force the read to happen
1021 // (not be eliminated by the compiler)
1022 static char c;
1023 static volatile char* p;
1024
1025 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0);
1026 if (p == NULL) {
1027 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory");
1028 }
1029
1030 c = *p;
1031 WB_END
1032
1033 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o))
1034 const char* features = VM_Version::features_string();
1035 ThreadToNativeFromVM ttn(thread);
1036 jstring features_string = env->NewStringUTF(features);
1037
1038 CHECK_JNI_EXCEPTION_(env, NULL);
1039
1040 return features_string;
1041 WB_END
1042
1043 int WhiteBox::get_blob_type(const CodeBlob* code) {
1044 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1045 return CodeCache::get_code_heap(code)->code_blob_type();
1046 }
1047
1048 CodeHeap* WhiteBox::get_code_heap(int blob_type) {
1049 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1050 return CodeCache::get_code_heap(blob_type);
1051 }
1052
1053 struct CodeBlobStub {
1054 CodeBlobStub(const CodeBlob* blob) :
1055 name(os::strdup(blob->name())),
1056 size(blob->size()),
1057 blob_type(WhiteBox::get_blob_type(blob)),
1058 address((jlong) blob) { }
1059 ~CodeBlobStub() { os::free((void*) name); }
1060 const char* const name;
1061 const jint size;
1062 const jint blob_type;
1063 const jlong address;
1064 };
1065
1066 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) {
1067 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1068 CHECK_JNI_EXCEPTION_(env, NULL);
1069 jobjectArray result = env->NewObjectArray(4, clazz, NULL);
1070
1071 jstring name = env->NewStringUTF(cb->name);
1072 CHECK_JNI_EXCEPTION_(env, NULL);
1073 env->SetObjectArrayElement(result, 0, name);
1074
1075 jobject obj = integerBox(thread, env, cb->size);
1076 CHECK_JNI_EXCEPTION_(env, NULL);
1077 env->SetObjectArrayElement(result, 1, obj);
1078
1079 obj = integerBox(thread, env, cb->blob_type);
1080 CHECK_JNI_EXCEPTION_(env, NULL);
1081 env->SetObjectArrayElement(result, 2, obj);
1082
1083 obj = longBox(thread, env, cb->address);
1084 CHECK_JNI_EXCEPTION_(env, NULL);
1085 env->SetObjectArrayElement(result, 3, obj);
1086
1087 return result;
1088 }
1089
1090 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr))
1091 ResourceMark rm(THREAD);
1092 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1093 CHECK_JNI_EXCEPTION_(env, NULL);
1094 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
1095 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code();
1096 jobjectArray result = NULL;
1097 if (code == NULL) {
1098 return result;
1099 }
1100 int insts_size = code->insts_size();
1101
1102 ThreadToNativeFromVM ttn(thread);
1103 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1104 CHECK_JNI_EXCEPTION_(env, NULL);
1105 result = env->NewObjectArray(5, clazz, NULL);
1106 if (result == NULL) {
1107 return result;
1108 }
1109
1110 CodeBlobStub stub(code);
1111 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub);
1112 CHECK_JNI_EXCEPTION_(env, NULL);
1113 env->SetObjectArrayElement(result, 0, codeBlob);
1114
1115 jobject level = integerBox(thread, env, code->comp_level());
1116 CHECK_JNI_EXCEPTION_(env, NULL);
1117 env->SetObjectArrayElement(result, 1, level);
1118
1119 jbyteArray insts = env->NewByteArray(insts_size);
1120 CHECK_JNI_EXCEPTION_(env, NULL);
1121 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin());
1122 env->SetObjectArrayElement(result, 2, insts);
1123
1124 jobject id = integerBox(thread, env, code->compile_id());
1125 CHECK_JNI_EXCEPTION_(env, NULL);
1126 env->SetObjectArrayElement(result, 3, id);
1127
1128 jobject entry_point = longBox(thread, env, (jlong) code->entry_point());
1129 CHECK_JNI_EXCEPTION_(env, NULL);
1130 env->SetObjectArrayElement(result, 4, entry_point);
1131
1132 return result;
1133 WB_END
1134
1135 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) {
1136 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled");
1137 BufferBlob* blob;
1138 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob));
1139 if (full_size < size) {
1140 full_size += round_to(size - full_size, oopSize);
1141 }
1142 {
1143 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1144 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type);
1145 ::new (blob) BufferBlob("WB::DummyBlob", full_size);
1146 }
1147 // Track memory usage statistic after releasing CodeCache_lock
1148 MemoryService::track_code_cache_memory_usage();
1149 return blob;
1150 }
1151
1152 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type))
1153 if (size < 0) {
1154 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1155 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size));
1156 }
1157 return (jlong) WhiteBox::allocate_code_blob(size, blob_type);
1158 WB_END
1159
1160 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr))
1161 if (addr == 0) {
1162 return;
1163 }
1164 BufferBlob::free((BufferBlob*) addr);
1165 WB_END
1166
1167 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type))
1168 ResourceMark rm;
1169 GrowableArray<CodeBlobStub*> blobs;
1170 {
1171 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1172 CodeHeap* heap = WhiteBox::get_code_heap(blob_type);
1173 if (heap == NULL) {
1174 return NULL;
1175 }
1176 for (CodeBlob* cb = (CodeBlob*) heap->first();
1177 cb != NULL; cb = (CodeBlob*) heap->next(cb)) {
1178 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub);
1179 new (stub) CodeBlobStub(cb);
1180 blobs.append(stub);
1181 }
1182 }
1183 if (blobs.length() == 0) {
1184 return NULL;
1185 }
1186 ThreadToNativeFromVM ttn(thread);
1187 jobjectArray result = NULL;
1188 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string());
1189 CHECK_JNI_EXCEPTION_(env, NULL);
1190 result = env->NewObjectArray(blobs.length(), clazz, NULL);
1191 if (result == NULL) {
1192 return result;
1193 }
1194 int i = 0;
1195 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin();
1196 it != blobs.end(); ++it) {
1197 jobjectArray obj = codeBlob2objectArray(thread, env, *it);
1198 CHECK_JNI_EXCEPTION_(env, NULL);
1199 env->SetObjectArrayElement(result, i, obj);
1200 ++i;
1201 }
1202 return result;
1203 WB_END
1204
1205 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o))
1206 return CompileBroker::get_compilation_activity_mode();
1207 WB_END
1208
1209 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr))
1210 if (addr == 0) {
1211 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(),
1212 "WB_GetCodeBlob: addr is null");
1213 }
1214 ThreadToNativeFromVM ttn(thread);
1215 CodeBlobStub stub((CodeBlob*) addr);
1216 return codeBlob2objectArray(thread, env, &stub);
1217 WB_END
1218
1219 WB_ENTRY(jlong, WB_GetMethodData(JNIEnv* env, jobject wv, jobject method))
1220 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1221 CHECK_JNI_EXCEPTION_(env, 0);
1222 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1223 return (jlong) mh->method_data();
1224 WB_END
1225
1226 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o))
1227 return (jlong) Thread::current()->stack_size();
1228 WB_END
1229
1230 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o))
1231 JavaThread* t = JavaThread::current();
1232 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong)JavaThread::stack_shadow_zone_size();
1233 WB_END
1234
1235
1236 int WhiteBox::array_bytes_to_length(size_t bytes) {
1237 return Array<u1>::bytes_to_length(bytes);
1238 }
1239
1240 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size))
1241 if (size < 0) {
1242 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1243 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size));
1244 }
1245
1246 oop class_loader_oop = JNIHandles::resolve(class_loader);
1247 ClassLoaderData* cld = class_loader_oop != NULL
1248 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1249 : ClassLoaderData::the_null_class_loader_data();
1250
1251 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread);
1252
1253 return (jlong)(uintptr_t)metadata;
1254 WB_END
1255
1256 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size))
1257 oop class_loader_oop = JNIHandles::resolve(class_loader);
1258 ClassLoaderData* cld = class_loader_oop != NULL
1259 ? java_lang_ClassLoader::loader_data(class_loader_oop)
1260 : ClassLoaderData::the_null_class_loader_data();
1261
1262 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr);
1263 WB_END
1264
1265 WB_ENTRY(void, WB_DefineModule(JNIEnv* env, jobject o, jobject module, jstring version, jstring location,
1266 jobjectArray packages))
1267 Modules::define_module(module, version, location, packages, CHECK);
1268 WB_END
1269
1270 WB_ENTRY(void, WB_AddModuleExports(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1271 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1272 WB_END
1273
1274 WB_ENTRY(void, WB_AddModuleExportsToAllUnnamed(JNIEnv* env, jobject o, jclass module, jstring package))
1275 Modules::add_module_exports_to_all_unnamed(module, package, CHECK);
1276 WB_END
1277
1278 WB_ENTRY(void, WB_AddModuleExportsToAll(JNIEnv* env, jobject o, jclass module, jstring package))
1279 Modules::add_module_exports(module, package, NULL, CHECK);
1280 WB_END
1281
1282 WB_ENTRY(void, WB_AddReadsModule(JNIEnv* env, jobject o, jobject from_module, jobject source_module))
1283 Modules::add_reads_module(from_module, source_module, CHECK);
1284 WB_END
1285
1286 WB_ENTRY(jboolean, WB_CanReadModule(JNIEnv* env, jobject o, jobject asking_module, jobject source_module))
1287 return Modules::can_read_module(asking_module, source_module, THREAD);
1288 WB_END
1289
1290 WB_ENTRY(jboolean, WB_IsExportedToModule(JNIEnv* env, jobject o, jobject from_module, jstring package, jobject to_module))
1291 return Modules::is_exported_to_module(from_module, package, to_module, THREAD);
1292 WB_END
1293
1294 WB_ENTRY(void, WB_AddModulePackage(JNIEnv* env, jobject o, jclass module, jstring package))
1295 Modules::add_module_package(module, package, CHECK);
1296 WB_END
1297
1298 WB_ENTRY(jobject, WB_GetModuleByPackageName(JNIEnv* env, jobject o, jobject loader, jstring package))
1299 return Modules::get_module_by_package_name(loader, package, THREAD);
1300 WB_END
1301
1302 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc))
1303 if (inc < 0) {
1304 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1305 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc));
1306 }
1307
1308 jlong max_size_t = (jlong) ((size_t) -1);
1309 if (inc > max_size_t) {
1310 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1311 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc));
1312 }
1313
1314 size_t new_cap_until_GC = 0;
1315 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment());
1316 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC);
1317 if (!success) {
1318 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(),
1319 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC "
1320 "due to contention with another thread");
1321 }
1322 return (jlong) new_cap_until_GC;
1323 WB_END
1324
1325 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb))
1326 return (jlong) MetaspaceGC::capacity_until_GC();
1327 WB_END
1328
1329
1330 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue))
1331 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ?
1332 Monitor::_safepoint_check_always :
1333 Monitor::_safepoint_check_never;
1334 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required),
1335 attemptedNoSafepointValue == JNI_TRUE);
1336 WB_END
1337
1338 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj))
1339 oop obj_oop = JNIHandles::resolve(obj);
1340 return (jboolean) obj_oop->mark()->has_monitor();
1341 WB_END
1342
1343 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb))
1344 VM_ForceSafepoint force_safepoint_op;
1345 VMThread::execute(&force_safepoint_op);
1346 WB_END
1347
1348 WB_ENTRY(jlong, WB_GetConstantPool(JNIEnv* env, jobject wb, jclass klass))
1349 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1350 return (jlong) ikh->constants();
1351 WB_END
1352
1353 WB_ENTRY(jint, WB_GetConstantPoolCacheIndexTag(JNIEnv* env, jobject wb))
1354 return ConstantPool::CPCACHE_INDEX_TAG;
1355 WB_END
1356
1357 WB_ENTRY(jint, WB_GetConstantPoolCacheLength(JNIEnv* env, jobject wb, jclass klass))
1358 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1359 ConstantPool* cp = ikh->constants();
1360 if (cp->cache() == NULL) {
1361 return -1;
1362 }
1363 return cp->cache()->length();
1364 WB_END
1365
1366 WB_ENTRY(jint, WB_ConstantPoolRemapInstructionOperandFromCache(JNIEnv* env, jobject wb, jclass klass, jint index))
1367 instanceKlassHandle ikh(java_lang_Class::as_Klass(JNIHandles::resolve(klass)));
1368 ConstantPool* cp = ikh->constants();
1369 if (cp->cache() == NULL) {
1370 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), "Constant pool does not have a cache");
1371 }
1372 jint cpci = index;
1373 jint cpciTag = ConstantPool::CPCACHE_INDEX_TAG;
1374 if (cpciTag > cpci || cpci >= cp->cache()->length() + cpciTag) {
1375 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool cache index is out of range");
1376 }
1377 jint cpi = cp->remap_instruction_operand_from_cache(cpci);
1378 return cpi;
1379 WB_END
1380
1381 WB_ENTRY(jint, WB_ConstantPoolEncodeIndyIndex(JNIEnv* env, jobject wb, jint index))
1382 return ConstantPool::encode_invokedynamic_index(index);
1383 WB_END
1384
1385 WB_ENTRY(void, WB_ClearInlineCaches(JNIEnv* env, jobject wb, jboolean preserve_static_stubs))
1386 VM_ClearICs clear_ics(preserve_static_stubs == JNI_TRUE);
1387 VMThread::execute(&clear_ics);
1388 WB_END
1389
1390 template <typename T>
1391 static bool GetMethodOption(JavaThread* thread, JNIEnv* env, jobject method, jstring name, T* value) {
1392 assert(value != NULL, "sanity");
1393 if (method == NULL || name == NULL) {
1394 return false;
1395 }
1396 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
1397 CHECK_JNI_EXCEPTION_(env, false);
1398 methodHandle mh(thread, Method::checked_resolve_jmethod_id(jmid));
1399 // can't be in VM when we call JNI
1400 ThreadToNativeFromVM ttnfv(thread);
1401 const char* flag_name = env->GetStringUTFChars(name, NULL);
1402 bool result = CompilerOracle::has_option_value(mh, flag_name, *value);
1403 env->ReleaseStringUTFChars(name, flag_name);
1404 return result;
1405 }
1406
1407 WB_ENTRY(jobject, WB_GetMethodBooleaneOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1408 bool result;
1409 if (GetMethodOption<bool> (thread, env, method, name, &result)) {
1410 // can't be in VM when we call JNI
1411 ThreadToNativeFromVM ttnfv(thread);
1412 return booleanBox(thread, env, result);
1413 }
1414 return NULL;
1415 WB_END
1416
1417 WB_ENTRY(jobject, WB_GetMethodIntxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1418 intx result;
1419 if (GetMethodOption <intx> (thread, env, method, name, &result)) {
1420 // can't be in VM when we call JNI
1421 ThreadToNativeFromVM ttnfv(thread);
1422 return longBox(thread, env, result);
1423 }
1424 return NULL;
1425 WB_END
1426
1427 WB_ENTRY(jobject, WB_GetMethodUintxOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1428 uintx result;
1429 if (GetMethodOption <uintx> (thread, env, method, name, &result)) {
1430 // can't be in VM when we call JNI
1431 ThreadToNativeFromVM ttnfv(thread);
1432 return longBox(thread, env, result);
1433 }
1434 return NULL;
1435 WB_END
1436
1437 WB_ENTRY(jobject, WB_GetMethodDoubleOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1438 double result;
1439 if (GetMethodOption <double> (thread, env, method, name, &result)) {
1440 // can't be in VM when we call JNI
1441 ThreadToNativeFromVM ttnfv(thread);
1442 return doubleBox(thread, env, result);
1443 }
1444 return NULL;
1445 WB_END
1446
1447 WB_ENTRY(jobject, WB_GetMethodStringOption(JNIEnv* env, jobject wb, jobject method, jstring name))
1448 ccstr ccstrResult;
1449 if (GetMethodOption <ccstr> (thread, env, method, name, &ccstrResult)) {
1450 // can't be in VM when we call JNI
1451 ThreadToNativeFromVM ttnfv(thread);
1452 jstring result = env->NewStringUTF(ccstrResult);
1453 CHECK_JNI_EXCEPTION_(env, NULL);
1454 return result;
1455 }
1456 return NULL;
1457 WB_END
1458
1459 WB_ENTRY(jboolean, WB_IsShared(JNIEnv* env, jobject wb, jobject obj))
1460 oop obj_oop = JNIHandles::resolve(obj);
1461 return MetaspaceShared::is_in_shared_space((void*)obj_oop);
1462 WB_END
1463
1464 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz))
1465 return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1466 WB_END
1467
1468 WB_ENTRY(jboolean, WB_AreSharedStringsIgnored(JNIEnv* env))
1469 return StringTable::shared_string_ignored();
1470 WB_END
1471
1472 //Some convenience methods to deal with objects from java
1473 int WhiteBox::offset_for_field(const char* field_name, oop object,
1474 Symbol* signature_symbol) {
1475 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
1476 Thread* THREAD = Thread::current();
1477
1478 //Get the class of our object
1479 Klass* arg_klass = object->klass();
1480 //Turn it into an instance-klass
1481 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
1482
1483 //Create symbols to look for in the class
1484 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
1485 THREAD);
1486
1487 //To be filled in with an offset of the field we're looking for
1488 fieldDescriptor fd;
1489
1490 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
1491 if (res == NULL) {
1492 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
1493 name_symbol->as_C_string());
1494 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:classload=info to see the origin of the problem class");
1495 }
1496
1497 //fetch the field at the offset we've found
1498 int dest_offset = fd.offset();
1499
1500 return dest_offset;
1501 }
1502
1503
1504 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
1505 int offset = offset_for_field(field_name, object,
1506 vmSymbols::string_signature());
1507 oop string = object->obj_field(offset);
1508 if (string == NULL) {
1509 return NULL;
1510 }
1511 const char* ret = java_lang_String::as_utf8_string(string);
1512 return ret;
1513 }
1514
1515 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
1516 int offset =
1517 offset_for_field(field_name, object, vmSymbols::bool_signature());
1518 bool ret = (object->bool_field(offset) == JNI_TRUE);
1519 return ret;
1520 }
1521
1522 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) {
1523 ResourceMark rm;
1524 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
1525
1526 // one by one registration natives for exception catching
1527 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string());
1528 CHECK_JNI_EXCEPTION(env);
1529 for (int i = 0, n = method_count; i < n; ++i) {
1530 // Skip dummy entries
1531 if (method_array[i].fnPtr == NULL) continue;
1532 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) {
1533 jthrowable throwable_obj = env->ExceptionOccurred();
1534 if (throwable_obj != NULL) {
1535 env->ExceptionClear();
1536 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) {
1537 // NoSuchMethodError is thrown when a method can't be found or a method is not native.
1538 // Ignoring the exception since it is not preventing use of other WhiteBox methods.
1539 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s",
1540 method_array[i].name, method_array[i].signature);
1541 }
1542 } else {
1543 // Registration failed unexpectedly.
1544 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered",
1545 method_array[i].name, method_array[i].signature);
1546 env->UnregisterNatives(wbclass);
1547 break;
1548 }
1549 }
1550 }
1551 }
1552
1553 WB_ENTRY(jint, WB_AddCompilerDirective(JNIEnv* env, jobject o, jstring compDirect))
1554 // can't be in VM when we call JNI
1555 ThreadToNativeFromVM ttnfv(thread);
1556 const char* dir = env->GetStringUTFChars(compDirect, NULL);
1557 int ret;
1558 {
1559 ThreadInVMfromNative ttvfn(thread); // back to VM
1560 ret = DirectivesParser::parse_string(dir, tty);
1561 }
1562 env->ReleaseStringUTFChars(compDirect, dir);
1563 // -1 for error parsing directive. Return 0 as number of directives added.
1564 if (ret == -1) {
1565 ret = 0;
1566 }
1567 return (jint) ret;
1568 WB_END
1569
1570 WB_ENTRY(void, WB_RemoveCompilerDirective(JNIEnv* env, jobject o, jint count))
1571 DirectivesStack::pop(count);
1572 WB_END
1573
1574 #define CC (char*)
1575
1576 static JNINativeMethod methods[] = {
1577 {CC"getObjectAddress0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
1578 {CC"getObjectSize0", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize },
1579 {CC"isObjectInOldGen0", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen },
1580 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
1581 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize },
1582 {CC"getVMAllocationGranularity", CC"()J", (void*)&WB_GetVMAllocationGranularity },
1583 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize},
1584 {CC"getHeapSpaceAlignment", CC"()J", (void*)&WB_GetHeapSpaceAlignment},
1585 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
1586 {CC"parseCommandLine0",
1587 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
1588 (void*) &WB_ParseCommandLine
1589 },
1590 {CC"addToBootstrapClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1591 (void*)&WB_AddToBootstrapClassLoaderSearch},
1592 {CC"addToSystemClassLoaderSearch0", CC"(Ljava/lang/String;)V",
1593 (void*)&WB_AddToSystemClassLoaderSearch},
1594 {CC"getCompressedOopsMaxHeapSize", CC"()J",
1595 (void*)&WB_GetCompressedOopsMaxHeapSize},
1596 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes },
1597 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests},
1598 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea},
1599 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize},
1600 #if INCLUDE_ALL_GCS
1601 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
1602 {CC"g1IsHumongous0", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
1603 {CC"g1BelongsToHumongousRegion0", CC"(J)Z", (void*)&WB_G1BelongsToHumongousRegion},
1604 {CC"g1BelongsToFreeRegion0", CC"(J)Z", (void*)&WB_G1BelongsToFreeRegion},
1605 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions },
1606 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
1607 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
1608 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle },
1609 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;",
1610 (void*)&WB_G1AuxiliaryMemoryUsage },
1611 {CC"psVirtualSpaceAlignment",CC"()J", (void*)&WB_PSVirtualSpaceAlignment},
1612 {CC"psHeapGenerationAlignment",CC"()J", (void*)&WB_PSHeapGenerationAlignment},
1613 #endif // INCLUDE_ALL_GCS
1614 #if INCLUDE_NMT
1615 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc },
1616 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack},
1617 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree },
1618 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory },
1619 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory },
1620 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory },
1621 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory },
1622 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel},
1623 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize },
1624 #endif // INCLUDE_NMT
1625 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames },
1626 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
1627 {CC"deoptimizeMethod0", CC"(Ljava/lang/reflect/Executable;Z)I",
1628 (void*)&WB_DeoptimizeMethod },
1629 {CC"isMethodCompiled0", CC"(Ljava/lang/reflect/Executable;Z)Z",
1630 (void*)&WB_IsMethodCompiled },
1631 {CC"isMethodCompilable0", CC"(Ljava/lang/reflect/Executable;IZ)Z",
1632 (void*)&WB_IsMethodCompilable},
1633 {CC"isMethodQueuedForCompilation0",
1634 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation},
1635 {CC"isIntrinsicAvailable0",
1636 CC"(Ljava/lang/reflect/Executable;Ljava/lang/reflect/Executable;I)Z",
1637 (void*)&WB_IsIntrinsicAvailable},
1638 {CC"makeMethodNotCompilable0",
1639 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable},
1640 {CC"testSetDontInlineMethod0",
1641 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod},
1642 {CC"getMethodCompilationLevel0",
1643 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel},
1644 {CC"getMethodEntryBci0",
1645 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci},
1646 {CC"getCompileQueueSize",
1647 CC"(I)I", (void*)&WB_GetCompileQueueSize},
1648 {CC"testSetForceInlineMethod0",
1649 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod},
1650 {CC"enqueueMethodForCompilation0",
1651 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation},
1652 {CC"enqueueInitializerForCompilation0",
1653 CC"(Ljava/lang/Class;I)Z", (void*)&WB_EnqueueInitializerForCompilation},
1654 {CC"clearMethodState0",
1655 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState},
1656 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation},
1657 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation},
1658 {CC"matchesMethod",
1659 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1660 (void*)&WB_MatchesMethod},
1661 {CC"matchesInline",
1662 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)I",
1663 (void*)&WB_MatchesInline},
1664 {CC"shouldPrintAssembly",
1665 CC"(Ljava/lang/reflect/Executable;I)Z",
1666 (void*)&WB_ShouldPrintAssembly},
1667
1668 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag},
1669 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag},
1670 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag},
1671 {CC"setIntVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntVMFlag},
1672 {CC"setUintVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintVMFlag},
1673 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag},
1674 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag},
1675 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag},
1676 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag},
1677 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag},
1678 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V",
1679 (void*)&WB_SetStringVMFlag},
1680 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;",
1681 (void*)&WB_GetBooleanVMFlag},
1682 {CC"getIntVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1683 (void*)&WB_GetIntVMFlag},
1684 {CC"getUintVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1685 (void*)&WB_GetUintVMFlag},
1686 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1687 (void*)&WB_GetIntxVMFlag},
1688 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1689 (void*)&WB_GetUintxVMFlag},
1690 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1691 (void*)&WB_GetUint64VMFlag},
1692 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;",
1693 (void*)&WB_GetSizeTVMFlag},
1694 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;",
1695 (void*)&WB_GetDoubleVMFlag},
1696 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;",
1697 (void*)&WB_GetStringVMFlag},
1698 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
1699 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
1700 {CC"youngGC", CC"()V", (void*)&WB_YoungGC },
1701 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory },
1702 {CC"allocateMetaspace",
1703 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace },
1704 {CC"freeMetaspace",
1705 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace },
1706 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC },
1707 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC },
1708 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures },
1709 {CC"getNMethod0", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;",
1710 (void*)&WB_GetNMethod },
1711 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep },
1712 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob },
1713 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob },
1714 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries },
1715 {CC"getCompilationActivityMode",
1716 CC"()I", (void*)&WB_GetCompilationActivityMode},
1717 {CC"getMethodData0", CC"(Ljava/lang/reflect/Executable;)J",
1718 (void*)&WB_GetMethodData },
1719 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob },
1720 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize },
1721 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize },
1722 {CC"DefineModule", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)V",
1723 (void*)&WB_DefineModule },
1724 {CC"AddModuleExports", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V",
1725 (void*)&WB_AddModuleExports },
1726 {CC"AddReadsModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)V",
1727 (void*)&WB_AddReadsModule },
1728 {CC"CanReadModule", CC"(Ljava/lang/Object;Ljava/lang/Object;)Z",
1729 (void*)&WB_CanReadModule },
1730 {CC"IsExportedToModule", CC"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Z",
1731 (void*)&WB_IsExportedToModule },
1732 {CC"AddModulePackage", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1733 (void*)&WB_AddModulePackage },
1734 {CC"GetModuleByPackageName", CC"(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;",
1735 (void*)&WB_GetModuleByPackageName },
1736 {CC"AddModuleExportsToAllUnnamed", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1737 (void*)&WB_AddModuleExportsToAllUnnamed },
1738 {CC"AddModuleExportsToAll", CC"(Ljava/lang/Object;Ljava/lang/String;)V",
1739 (void*)&WB_AddModuleExportsToAll },
1740 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls },
1741 {CC"isMonitorInflated0", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated },
1742 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint },
1743 {CC"getConstantPool0", CC"(Ljava/lang/Class;)J", (void*)&WB_GetConstantPool },
1744 {CC"getConstantPoolCacheIndexTag0", CC"()I", (void*)&WB_GetConstantPoolCacheIndexTag},
1745 {CC"getConstantPoolCacheLength0", CC"(Ljava/lang/Class;)I", (void*)&WB_GetConstantPoolCacheLength},
1746 {CC"remapInstructionOperandFromCPCache0",
1747 CC"(Ljava/lang/Class;I)I", (void*)&WB_ConstantPoolRemapInstructionOperandFromCache},
1748 {CC"encodeConstantPoolIndyIndex0",
1749 CC"(I)I", (void*)&WB_ConstantPoolEncodeIndyIndex},
1750 {CC"getMethodBooleanOption",
1751 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Boolean;",
1752 (void*)&WB_GetMethodBooleaneOption},
1753 {CC"getMethodIntxOption",
1754 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1755 (void*)&WB_GetMethodIntxOption},
1756 {CC"getMethodUintxOption",
1757 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Long;",
1758 (void*)&WB_GetMethodUintxOption},
1759 {CC"getMethodDoubleOption",
1760 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/Double;",
1761 (void*)&WB_GetMethodDoubleOption},
1762 {CC"getMethodStringOption",
1763 CC"(Ljava/lang/reflect/Executable;Ljava/lang/String;)Ljava/lang/String;",
1764 (void*)&WB_GetMethodStringOption},
1765 {CC"isShared", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsShared },
1766 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass },
1767 {CC"areSharedStringsIgnored", CC"()Z", (void*)&WB_AreSharedStringsIgnored },
1768 {CC"clearInlineCaches0", CC"(Z)V", (void*)&WB_ClearInlineCaches },
1769 {CC"addCompilerDirective", CC"(Ljava/lang/String;)I",
1770 (void*)&WB_AddCompilerDirective },
1771 {CC"removeCompilerDirective", CC"(I)V", (void*)&WB_RemoveCompilerDirective },
1772 };
1773
1774 #undef CC
1775
1776 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
1777 {
1778 if (WhiteBoxAPI) {
1779 // Make sure that wbclass is loaded by the null classloader
1780 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
1781 Handle loader(ikh->class_loader());
1782 if (loader.is_null()) {
1783 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0]));
1784 WhiteBox::register_extended(env, wbclass, thread);
1785 WhiteBox::set_used();
1786 }
1787 }
1788 }
1789 JVM_END