1 /* 2 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 27 #include <new> 28 29 #include "classfile/classLoaderData.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "code/codeCache.hpp" 32 #include "jvmtifiles/jvmtiEnv.hpp" 33 #include "memory/metadataFactory.hpp" 34 #include "memory/universe.hpp" 35 #include "oops/oop.inline.hpp" 36 #include "prims/wbtestmethods/parserTests.hpp" 37 #include "prims/whitebox.hpp" 38 #include "runtime/arguments.hpp" 39 #include "runtime/compilationPolicy.hpp" 40 #include "runtime/deoptimization.hpp" 41 #include "runtime/interfaceSupport.hpp" 42 #include "runtime/os.hpp" 43 #include "runtime/sweeper.hpp" 44 #include "runtime/javaCalls.hpp" 45 #include "runtime/thread.hpp" 46 #include "runtime/vm_version.hpp" 47 #include "utilities/array.hpp" 48 #include "utilities/debug.hpp" 49 #include "utilities/exceptions.hpp" 50 #include "utilities/macros.hpp" 51 #if INCLUDE_ALL_GCS 52 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" 53 #include "gc_implementation/g1/concurrentMark.hpp" 54 #include "gc_implementation/g1/concurrentMarkThread.hpp" 55 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 56 #include "gc_implementation/g1/heapRegionRemSet.hpp" 57 #endif // INCLUDE_ALL_GCS 58 #if INCLUDE_NMT 59 #include "services/mallocSiteTable.hpp" 60 #include "services/memTracker.hpp" 61 #include "utilities/nativeCallStack.hpp" 62 #endif // INCLUDE_NMT 63 64 65 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 66 67 #define SIZE_T_MAX_VALUE ((size_t) -1) 68 69 bool WhiteBox::_used = false; 70 volatile bool WhiteBox::compilation_locked = false; 71 72 class VM_WhiteBoxOperation : public VM_Operation { 73 public: 74 VM_WhiteBoxOperation() { } 75 VMOp_Type type() const { return VMOp_WhiteBoxOperation; } 76 bool allow_nested_vm_operations() const { return true; } 77 }; 78 79 80 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) 81 return (jlong)(void*)JNIHandles::resolve(obj); 82 WB_END 83 84 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) 85 return heapOopSize; 86 WB_END 87 88 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o)) 89 return os::vm_page_size(); 90 WB_END 91 92 class WBIsKlassAliveClosure : public KlassClosure { 93 Symbol* _name; 94 bool _found; 95 public: 96 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} 97 98 void do_klass(Klass* k) { 99 if (_found) return; 100 Symbol* ksym = k->name(); 101 if (ksym->fast_compare(_name) == 0) { 102 _found = true; 103 } 104 } 105 106 bool found() const { 107 return _found; 108 } 109 }; 110 111 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) 112 Handle h_name = JNIHandles::resolve(name); 113 if (h_name.is_null()) return false; 114 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); 115 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return 116 117 WBIsKlassAliveClosure closure(sym); 118 ClassLoaderDataGraph::classes_do(&closure); 119 120 return closure.found(); 121 WB_END 122 123 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) { 124 #if INCLUDE_JVMTI 125 ResourceMark rm; 126 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment)); 127 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION); 128 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg); 129 assert(err == JVMTI_ERROR_NONE, "must not fail"); 130 #endif 131 } 132 WB_END 133 134 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) { 135 #if INCLUDE_JVMTI 136 ResourceMark rm; 137 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment)); 138 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION); 139 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg); 140 assert(err == JVMTI_ERROR_NONE, "must not fail"); 141 #endif 142 } 143 WB_END 144 145 146 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) { 147 return (jlong)Arguments::max_heap_for_compressed_oops(); 148 } 149 WB_END 150 151 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) { 152 CollectorPolicy * p = Universe::heap()->collector_policy(); 153 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap " 154 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT, 155 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(), 156 p->space_alignment(), p->heap_alignment()); 157 } 158 WB_END 159 160 #ifndef PRODUCT 161 // Forward declaration 162 void TestReservedSpace_test(); 163 void TestReserveMemorySpecial_test(); 164 void TestVirtualSpace_test(); 165 void TestMetaspaceAux_test(); 166 #endif 167 168 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o)) 169 #ifndef PRODUCT 170 TestReservedSpace_test(); 171 TestReserveMemorySpecial_test(); 172 TestVirtualSpace_test(); 173 TestMetaspaceAux_test(); 174 #endif 175 WB_END 176 177 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o)) 178 size_t granularity = os::vm_allocation_granularity(); 179 ReservedHeapSpace rhs(100 * granularity, granularity, false); 180 VirtualSpace vs; 181 vs.initialize(rhs, 50 * granularity); 182 183 // Check if constraints are complied 184 if (!( UseCompressedOops && rhs.base() != NULL && 185 Universe::narrow_oop_base() != NULL && 186 Universe::narrow_oop_use_implicit_null_checks() )) { 187 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n " 188 "\tUseCompressedOops is %d\n" 189 "\trhs.base() is "PTR_FORMAT"\n" 190 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n" 191 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d", 192 UseCompressedOops, 193 rhs.base(), 194 Universe::narrow_oop_base(), 195 Universe::narrow_oop_use_implicit_null_checks()); 196 return; 197 } 198 tty->print_cr("Reading from no access area... "); 199 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c", 200 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 )); 201 WB_END 202 203 static jint wb_stress_virtual_space_resize(size_t reserved_space_size, 204 size_t magnitude, size_t iterations) { 205 size_t granularity = os::vm_allocation_granularity(); 206 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false); 207 VirtualSpace vs; 208 if (!vs.initialize(rhs, 0)) { 209 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed."); 210 return 3; 211 } 212 213 long seed = os::random(); 214 tty->print_cr("Random seed is %ld", seed); 215 os::init_random(seed); 216 217 for (size_t i = 0; i < iterations; i++) { 218 219 // Whether we will shrink or grow 220 bool shrink = os::random() % 2L == 0; 221 222 // Get random delta to resize virtual space 223 size_t delta = (size_t)os::random() % magnitude; 224 225 // If we are about to shrink virtual space below zero, then expand instead 226 if (shrink && vs.committed_size() < delta) { 227 shrink = false; 228 } 229 230 // Resizing by delta 231 if (shrink) { 232 vs.shrink_by(delta); 233 } else { 234 // If expanding fails expand_by will silently return false 235 vs.expand_by(delta, true); 236 } 237 } 238 return 0; 239 } 240 241 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o, 242 jlong reserved_space_size, jlong magnitude, jlong iterations)) 243 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", " 244 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude, 245 iterations); 246 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) { 247 tty->print_cr("One of variables printed above is negative. Can't proceed.\n"); 248 return 1; 249 } 250 251 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is 252 // always 8 byte. That's why we should avoid overflow in case of 32bit platform. 253 if (sizeof(size_t) < sizeof(jlong)) { 254 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE; 255 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value 256 || iterations > size_t_max_value) { 257 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n"); 258 return 2; 259 } 260 } 261 262 return wb_stress_virtual_space_resize((size_t) reserved_space_size, 263 (size_t) magnitude, (size_t) iterations); 264 WB_END 265 266 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj)) 267 oop p = JNIHandles::resolve(obj); 268 #if INCLUDE_ALL_GCS 269 if (UseG1GC) { 270 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 271 const HeapRegion* hr = g1->heap_region_containing(p); 272 if (hr == NULL) { 273 return false; 274 } 275 return !(hr->is_young()); 276 } else if (UseParallelGC) { 277 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap(); 278 return !psh->is_in_young(p); 279 } 280 #endif // INCLUDE_ALL_GCS 281 GenCollectedHeap* gch = GenCollectedHeap::heap(); 282 return !gch->is_in_young(p); 283 WB_END 284 285 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj)) 286 oop p = JNIHandles::resolve(obj); 287 return p->size() * HeapWordSize; 288 WB_END 289 290 #if INCLUDE_ALL_GCS 291 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) 292 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 293 oop result = JNIHandles::resolve(obj); 294 const HeapRegion* hr = g1->heap_region_containing(result); 295 return hr->is_humongous(); 296 WB_END 297 298 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) 299 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 300 size_t nr = g1->num_free_regions(); 301 return (jlong)nr; 302 WB_END 303 304 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) 305 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 306 return g1->concurrent_mark()->cmThread()->during_cycle(); 307 WB_END 308 309 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o)) 310 G1CollectedHeap* g1h = G1CollectedHeap::heap(); 311 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) { 312 g1h->collect(GCCause::_wb_conc_mark); 313 return true; 314 } 315 return false; 316 WB_END 317 318 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) 319 return (jint)HeapRegion::GrainBytes; 320 WB_END 321 #endif // INCLUDE_ALL_GCS 322 323 #if INCLUDE_NMT 324 // Alloc memory using the test memory type so that we can use that to see if 325 // NMT picks it up correctly 326 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size)) 327 jlong addr = 0; 328 addr = (jlong)(uintptr_t)os::malloc(size, mtTest); 329 return addr; 330 WB_END 331 332 // Alloc memory with pseudo call stack. The test can create psudo malloc 333 // allocation site to stress the malloc tracking. 334 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack)) 335 address pc = (address)(size_t)pseudo_stack; 336 NativeCallStack stack(&pc, 1); 337 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack); 338 WB_END 339 340 // Free the memory allocated by NMTAllocTest 341 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem)) 342 os::free((void*)(uintptr_t)mem); 343 WB_END 344 345 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size)) 346 jlong addr = 0; 347 348 addr = (jlong)(uintptr_t)os::reserve_memory(size); 349 MemTracker::record_virtual_memory_type((address)addr, mtTest); 350 351 return addr; 352 WB_END 353 354 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 355 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem); 356 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest); 357 WB_END 358 359 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 360 os::uncommit_memory((char *)(uintptr_t)addr, size); 361 WB_END 362 363 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 364 os::release_memory((char *)(uintptr_t)addr, size); 365 WB_END 366 367 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env)) 368 return MemTracker::tracking_level() == NMT_detail; 369 WB_END 370 371 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env)) 372 // Test that we can downgrade NMT levels but not upgrade them. 373 if (MemTracker::tracking_level() == NMT_off) { 374 MemTracker::transition_to(NMT_off); 375 return MemTracker::tracking_level() == NMT_off; 376 } else { 377 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking"); 378 MemTracker::transition_to(NMT_summary); 379 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now"); 380 381 // Can't go to detail once NMT is set to summary. 382 MemTracker::transition_to(NMT_detail); 383 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now"); 384 385 // Shutdown sets tracking level to minimal. 386 MemTracker::shutdown(); 387 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now"); 388 389 // Once the tracking level is minimal, we cannot increase to summary. 390 // The code ignores this request instead of asserting because if the malloc site 391 // table overflows in another thread, it tries to change the code to summary. 392 MemTracker::transition_to(NMT_summary); 393 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now"); 394 395 // Really can never go up to detail, verify that the code would never do this. 396 MemTracker::transition_to(NMT_detail); 397 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now"); 398 return MemTracker::tracking_level() == NMT_minimal; 399 } 400 WB_END 401 402 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o)) 403 int hash_size = MallocSiteTable::hash_buckets(); 404 assert(hash_size > 0, "NMT hash_size should be > 0"); 405 return (jint)hash_size; 406 WB_END 407 #endif // INCLUDE_NMT 408 409 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) { 410 assert(method != NULL, "method should not be null"); 411 ThreadToNativeFromVM ttn(thread); 412 return env->FromReflectedMethod(method); 413 } 414 415 // Deoptimizes all compiled frames and makes nmethods not entrant if it's requested 416 class VM_WhiteBoxDeoptimizeFrames : public VM_WhiteBoxOperation { 417 private: 418 int _result; 419 const bool _make_not_entrant; 420 public: 421 VM_WhiteBoxDeoptimizeFrames(bool make_not_entrant) : 422 _result(0), _make_not_entrant(make_not_entrant) { } 423 int result() const { return _result; } 424 425 void doit() { 426 for (JavaThread* t = Threads::first(); t != NULL; t = t->next()) { 427 if (t->has_last_Java_frame()) { 428 for (StackFrameStream fst(t, UseBiasedLocking); !fst.is_done(); fst.next()) { 429 frame* f = fst.current(); 430 if (f->can_be_deoptimized() && !f->is_deoptimized_frame()) { 431 RegisterMap* reg_map = fst.register_map(); 432 Deoptimization::deoptimize(t, *f, reg_map); 433 if (_make_not_entrant) { 434 nmethod* nm = CodeCache::find_nmethod(f->pc()); 435 assert(nm != NULL, "sanity check"); 436 nm->make_not_entrant(); 437 } 438 ++_result; 439 } 440 } 441 } 442 } 443 } 444 }; 445 446 WB_ENTRY(jint, WB_DeoptimizeFrames(JNIEnv* env, jobject o, jboolean make_not_entrant)) 447 VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE); 448 VMThread::execute(&op); 449 return op.result(); 450 WB_END 451 452 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o)) 453 MutexLockerEx mu(Compile_lock); 454 CodeCache::mark_all_nmethods_for_deoptimization(); 455 VM_Deoptimize op; 456 VMThread::execute(&op); 457 WB_END 458 459 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 460 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 461 int result = 0; 462 CHECK_JNI_EXCEPTION_(env, result); 463 MutexLockerEx mu(Compile_lock); 464 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 465 if (is_osr) { 466 result += mh->mark_osr_nmethods(); 467 } else if (mh->code() != NULL) { 468 mh->code()->mark_for_deoptimization(); 469 ++result; 470 } 471 result += CodeCache::mark_for_deoptimization(mh()); 472 if (result > 0) { 473 VM_Deoptimize op; 474 VMThread::execute(&op); 475 } 476 return result; 477 WB_END 478 479 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 480 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 481 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 482 MutexLockerEx mu(Compile_lock); 483 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 484 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 485 if (code == NULL) { 486 return JNI_FALSE; 487 } 488 return (code->is_alive() && !code->is_marked_for_deoptimization()); 489 WB_END 490 491 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 492 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 493 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 494 MutexLockerEx mu(Compile_lock); 495 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 496 if (is_osr) { 497 return CompilationPolicy::can_be_osr_compiled(mh, comp_level); 498 } else { 499 return CompilationPolicy::can_be_compiled(mh, comp_level); 500 } 501 WB_END 502 503 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method)) 504 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 505 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 506 MutexLockerEx mu(Compile_lock); 507 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 508 return mh->queued_for_compilation(); 509 WB_END 510 511 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 512 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 513 CHECK_JNI_EXCEPTION_(env, CompLevel_none); 514 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 515 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 516 return (code != NULL ? code->comp_level() : CompLevel_none); 517 WB_END 518 519 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 520 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 521 CHECK_JNI_EXCEPTION(env); 522 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 523 if (is_osr) { 524 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox"); 525 } else { 526 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox"); 527 } 528 WB_END 529 530 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method)) 531 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 532 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci); 533 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 534 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false); 535 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci); 536 WB_END 537 538 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 539 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 540 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 541 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 542 bool result = mh->dont_inline(); 543 mh->set_dont_inline(value == JNI_TRUE); 544 return result; 545 WB_END 546 547 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level)) 548 if (comp_level == CompLevel_any) { 549 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ + 550 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */; 551 } else { 552 return CompileBroker::queue_size(comp_level); 553 } 554 WB_END 555 556 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 557 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 558 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 559 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 560 bool result = mh->force_inline(); 561 mh->set_force_inline(value == JNI_TRUE); 562 return result; 563 WB_END 564 565 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci)) 566 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 567 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 568 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 569 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD); 570 MutexLockerEx mu(Compile_lock); 571 return (mh->queued_for_compilation() || nm != NULL); 572 WB_END 573 574 class AlwaysFalseClosure : public BoolObjectClosure { 575 public: 576 bool do_object_b(oop p) { return false; } 577 }; 578 579 static AlwaysFalseClosure always_false; 580 581 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method)) 582 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 583 CHECK_JNI_EXCEPTION(env); 584 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 585 MutexLockerEx mu(Compile_lock); 586 MethodData* mdo = mh->method_data(); 587 MethodCounters* mcs = mh->method_counters(); 588 589 if (mdo != NULL) { 590 mdo->init(); 591 ResourceMark rm; 592 int arg_count = mdo->method()->size_of_parameters(); 593 for (int i = 0; i < arg_count; i++) { 594 mdo->set_arg_modified(i, 0); 595 } 596 MutexLockerEx mu(mdo->extra_data_lock()); 597 mdo->clean_method_data(&always_false); 598 } 599 600 mh->clear_not_c1_compilable(); 601 mh->clear_not_c2_compilable(); 602 mh->clear_not_c2_osr_compilable(); 603 NOT_PRODUCT(mh->set_compiled_invocation_count(0)); 604 if (mcs != NULL) { 605 mcs->backedge_counter()->init(); 606 mcs->invocation_counter()->init(); 607 mcs->set_interpreter_invocation_count(0); 608 mcs->set_interpreter_throwout_count(0); 609 610 #ifdef TIERED 611 mcs->set_rate(0.0F); 612 mh->set_prev_event_count(0); 613 mh->set_prev_time(0); 614 #endif 615 } 616 WB_END 617 618 template <typename T> 619 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) { 620 if (name == NULL) { 621 return false; 622 } 623 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 624 const char* flag_name = env->GetStringUTFChars(name, NULL); 625 bool result = (*TAt)(flag_name, value, true, true); 626 env->ReleaseStringUTFChars(name, flag_name); 627 return result; 628 } 629 630 template <typename T> 631 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) { 632 if (name == NULL) { 633 return false; 634 } 635 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 636 const char* flag_name = env->GetStringUTFChars(name, NULL); 637 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL); 638 env->ReleaseStringUTFChars(name, flag_name); 639 return result; 640 } 641 642 template <typename T> 643 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) { 644 ResourceMark rm(thread); 645 jclass clazz = env->FindClass(name->as_C_string()); 646 CHECK_JNI_EXCEPTION_(env, NULL); 647 jmethodID methodID = env->GetStaticMethodID(clazz, 648 vmSymbols::valueOf_name()->as_C_string(), 649 sig->as_C_string()); 650 CHECK_JNI_EXCEPTION_(env, NULL); 651 jobject result = env->CallStaticObjectMethod(clazz, methodID, value); 652 CHECK_JNI_EXCEPTION_(env, NULL); 653 return result; 654 } 655 656 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) { 657 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value); 658 } 659 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) { 660 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value); 661 } 662 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) { 663 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value); 664 } 665 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) { 666 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value); 667 }*/ 668 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) { 669 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value); 670 } 671 672 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) { 673 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 674 const char* flag_name = env->GetStringUTFChars(name, NULL); 675 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true); 676 env->ReleaseStringUTFChars(name, flag_name); 677 return result; 678 } 679 680 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name)) 681 Flag* flag = getVMFlag(thread, env, name); 682 return (flag != NULL) && flag->is_constant_in_binary(); 683 WB_END 684 685 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name)) 686 Flag* flag = getVMFlag(thread, env, name); 687 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker()); 688 WB_END 689 690 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name)) 691 bool result; 692 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) { 693 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 694 return booleanBox(thread, env, result); 695 } 696 return NULL; 697 WB_END 698 699 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name)) 700 intx result; 701 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) { 702 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 703 return longBox(thread, env, result); 704 } 705 return NULL; 706 WB_END 707 708 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name)) 709 uintx result; 710 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) { 711 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 712 return longBox(thread, env, result); 713 } 714 return NULL; 715 WB_END 716 717 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name)) 718 uint64_t result; 719 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) { 720 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 721 return longBox(thread, env, result); 722 } 723 return NULL; 724 WB_END 725 726 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name)) 727 uintx result; 728 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) { 729 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 730 return longBox(thread, env, result); 731 } 732 return NULL; 733 WB_END 734 735 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name)) 736 double result; 737 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) { 738 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 739 return doubleBox(thread, env, result); 740 } 741 return NULL; 742 WB_END 743 744 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name)) 745 ccstr ccstrResult; 746 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) { 747 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 748 jstring result = env->NewStringUTF(ccstrResult); 749 CHECK_JNI_EXCEPTION_(env, NULL); 750 return result; 751 } 752 return NULL; 753 WB_END 754 755 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value)) 756 bool result = value == JNI_TRUE ? true : false; 757 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut); 758 WB_END 759 760 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 761 intx result = value; 762 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut); 763 WB_END 764 765 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 766 uintx result = value; 767 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut); 768 WB_END 769 770 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 771 uint64_t result = value; 772 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut); 773 WB_END 774 775 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 776 size_t result = value; 777 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut); 778 WB_END 779 780 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value)) 781 double result = value; 782 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut); 783 WB_END 784 785 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value)) 786 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 787 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL); 788 ccstr ccstrResult = ccstrValue; 789 bool needFree; 790 { 791 ThreadInVMfromNative ttvfn(thread); // back to VM 792 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut); 793 } 794 if (value != NULL) { 795 env->ReleaseStringUTFChars(value, ccstrValue); 796 } 797 if (needFree) { 798 FREE_C_HEAP_ARRAY(char, ccstrResult); 799 } 800 WB_END 801 802 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout)) 803 WhiteBox::compilation_locked = true; 804 WB_END 805 806 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o)) 807 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag); 808 WhiteBox::compilation_locked = false; 809 mo.notify_all(); 810 WB_END 811 812 void WhiteBox::sweeper_thread_entry(JavaThread* thread, TRAPS) { 813 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled"); 814 { 815 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 816 NMethodSweeper::_should_sweep = true; 817 } 818 NMethodSweeper::possibly_sweep(); 819 } 820 821 JavaThread* WhiteBox::create_sweeper_thread(TRAPS) { 822 // create sweeper thread w/ custom entry -- one iteration instead of loop 823 CodeCacheSweeperThread* sweeper_thread = new CodeCacheSweeperThread(); 824 sweeper_thread->set_entry_point(&WhiteBox::sweeper_thread_entry); 825 826 // create j.l.Thread object and associate it w/ sweeper thread 827 { 828 // inherit deamon property from current thread 829 bool is_daemon = java_lang_Thread::is_daemon(JavaThread::current()->threadObj()); 830 831 HandleMark hm(THREAD); 832 Handle thread_group(THREAD, Universe::system_thread_group()); 833 const char* name = "WB Sweeper thread"; 834 sweeper_thread->allocate_threadObj(thread_group, name, is_daemon, THREAD); 835 } 836 837 { 838 MutexLocker mu(Threads_lock, THREAD); 839 Threads::add(sweeper_thread); 840 } 841 return sweeper_thread; 842 } 843 844 WB_ENTRY(jobject, WB_ForceNMethodSweep(JNIEnv* env, jobject o)) 845 JavaThread* sweeper_thread = WhiteBox::create_sweeper_thread(Thread::current()); 846 if (sweeper_thread == NULL) { 847 return NULL; 848 } 849 jobject result = JNIHandles::make_local(env, sweeper_thread->threadObj()); 850 Thread::start(sweeper_thread); 851 return result; 852 WB_END 853 854 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString)) 855 ResourceMark rm(THREAD); 856 int len; 857 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false); 858 return (StringTable::lookup(name, len) != NULL); 859 WB_END 860 861 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o)) 862 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true); 863 Universe::heap()->collect(GCCause::_last_ditch_collection); 864 #if INCLUDE_ALL_GCS 865 if (UseG1GC) { 866 // Needs to be cleared explicitly for G1 867 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false); 868 } 869 #endif // INCLUDE_ALL_GCS 870 WB_END 871 872 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o)) 873 Universe::heap()->collect(GCCause::_wb_young_gc); 874 WB_END 875 876 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o)) 877 // static+volatile in order to force the read to happen 878 // (not be eliminated by the compiler) 879 static char c; 880 static volatile char* p; 881 882 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0); 883 if (p == NULL) { 884 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory"); 885 } 886 887 c = *p; 888 WB_END 889 890 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o)) 891 const char* cpu_features = VM_Version::cpu_features(); 892 ThreadToNativeFromVM ttn(thread); 893 jstring features_string = env->NewStringUTF(cpu_features); 894 895 CHECK_JNI_EXCEPTION_(env, NULL); 896 897 return features_string; 898 WB_END 899 900 int WhiteBox::get_blob_type(const CodeBlob* code) { 901 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled"); 902 return CodeCache::get_code_heap(code)->code_blob_type(); 903 } 904 905 CodeHeap* WhiteBox::get_code_heap(int blob_type) { 906 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled"); 907 return CodeCache::get_code_heap(blob_type); 908 } 909 910 struct CodeBlobStub { 911 CodeBlobStub(const CodeBlob* blob) : 912 name(os::strdup(blob->name())), 913 size(blob->size()), 914 blob_type(WhiteBox::get_blob_type(blob)) { } 915 ~CodeBlobStub() { os::free((void*) name); } 916 const char* const name; 917 const int size; 918 const int blob_type; 919 }; 920 921 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) { 922 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 923 CHECK_JNI_EXCEPTION_(env, NULL); 924 jobjectArray result = env->NewObjectArray(3, clazz, NULL); 925 926 jstring name = env->NewStringUTF(cb->name); 927 CHECK_JNI_EXCEPTION_(env, NULL); 928 env->SetObjectArrayElement(result, 0, name); 929 930 jobject obj = integerBox(thread, env, cb->size); 931 CHECK_JNI_EXCEPTION_(env, NULL); 932 env->SetObjectArrayElement(result, 1, obj); 933 934 obj = integerBox(thread, env, cb->blob_type); 935 CHECK_JNI_EXCEPTION_(env, NULL); 936 env->SetObjectArrayElement(result, 2, obj); 937 938 return result; 939 } 940 941 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 942 ResourceMark rm(THREAD); 943 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 944 CHECK_JNI_EXCEPTION_(env, NULL); 945 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 946 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 947 jobjectArray result = NULL; 948 if (code == NULL) { 949 return result; 950 } 951 int insts_size = code->insts_size(); 952 953 ThreadToNativeFromVM ttn(thread); 954 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 955 CHECK_JNI_EXCEPTION_(env, NULL); 956 result = env->NewObjectArray(4, clazz, NULL); 957 if (result == NULL) { 958 return result; 959 } 960 961 CodeBlobStub stub(code); 962 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub); 963 env->SetObjectArrayElement(result, 0, codeBlob); 964 965 jobject level = integerBox(thread, env, code->comp_level()); 966 CHECK_JNI_EXCEPTION_(env, NULL); 967 env->SetObjectArrayElement(result, 1, level); 968 969 jbyteArray insts = env->NewByteArray(insts_size); 970 CHECK_JNI_EXCEPTION_(env, NULL); 971 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin()); 972 env->SetObjectArrayElement(result, 2, insts); 973 974 jobject id = integerBox(thread, env, code->compile_id()); 975 CHECK_JNI_EXCEPTION_(env, NULL); 976 env->SetObjectArrayElement(result, 3, id); 977 978 return result; 979 WB_END 980 981 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) { 982 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled"); 983 BufferBlob* blob; 984 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob)); 985 if (full_size < size) { 986 full_size += round_to(size - full_size, oopSize); 987 } 988 { 989 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 990 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type); 991 ::new (blob) BufferBlob("WB::DummyBlob", full_size); 992 } 993 // Track memory usage statistic after releasing CodeCache_lock 994 MemoryService::track_code_cache_memory_usage(); 995 return blob; 996 } 997 998 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type)) 999 return (jlong) WhiteBox::allocate_code_blob(size, blob_type); 1000 WB_END 1001 1002 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr)) 1003 BufferBlob::free((BufferBlob*) addr); 1004 WB_END 1005 1006 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type)) 1007 ResourceMark rm; 1008 GrowableArray<CodeBlobStub*> blobs; 1009 { 1010 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1011 CodeHeap* heap = WhiteBox::get_code_heap(blob_type); 1012 if (heap == NULL) { 1013 return NULL; 1014 } 1015 for (CodeBlob* cb = (CodeBlob*) heap->first(); 1016 cb != NULL; cb = (CodeBlob*) heap->next(cb)) { 1017 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub); 1018 new (stub) CodeBlobStub(cb); 1019 blobs.append(stub); 1020 } 1021 } 1022 if (blobs.length() == 0) { 1023 return NULL; 1024 } 1025 ThreadToNativeFromVM ttn(thread); 1026 jobjectArray result = NULL; 1027 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 1028 CHECK_JNI_EXCEPTION_(env, NULL); 1029 result = env->NewObjectArray(blobs.length(), clazz, NULL); 1030 if (result == NULL) { 1031 return result; 1032 } 1033 int i = 0; 1034 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin(); 1035 it != blobs.end(); ++it) { 1036 jobjectArray obj = codeBlob2objectArray(thread, env, *it); 1037 env->SetObjectArrayElement(result, i, obj); 1038 ++i; 1039 } 1040 return result; 1041 WB_END 1042 1043 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o)) 1044 return CompileBroker::get_compilation_activity_mode(); 1045 WB_END 1046 1047 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr)) 1048 ThreadToNativeFromVM ttn(thread); 1049 CodeBlobStub stub((CodeBlob*) addr); 1050 return codeBlob2objectArray(thread, env, &stub); 1051 WB_END 1052 1053 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o)) 1054 return (jlong) Thread::current()->stack_size(); 1055 WB_END 1056 1057 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o)) 1058 JavaThread* t = JavaThread::current(); 1059 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size(); 1060 WB_END 1061 1062 int WhiteBox::array_bytes_to_length(size_t bytes) { 1063 return Array<u1>::bytes_to_length(bytes); 1064 } 1065 1066 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size)) 1067 if (size < 0) { 1068 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1069 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size)); 1070 } 1071 1072 oop class_loader_oop = JNIHandles::resolve(class_loader); 1073 ClassLoaderData* cld = class_loader_oop != NULL 1074 ? java_lang_ClassLoader::loader_data(class_loader_oop) 1075 : ClassLoaderData::the_null_class_loader_data(); 1076 1077 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread); 1078 1079 return (jlong)(uintptr_t)metadata; 1080 WB_END 1081 1082 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size)) 1083 oop class_loader_oop = JNIHandles::resolve(class_loader); 1084 ClassLoaderData* cld = class_loader_oop != NULL 1085 ? java_lang_ClassLoader::loader_data(class_loader_oop) 1086 : ClassLoaderData::the_null_class_loader_data(); 1087 1088 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr); 1089 WB_END 1090 1091 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc)) 1092 if (inc < 0) { 1093 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1094 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc)); 1095 } 1096 1097 jlong max_size_t = (jlong) ((size_t) -1); 1098 if (inc > max_size_t) { 1099 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1100 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc)); 1101 } 1102 1103 size_t new_cap_until_GC = 0; 1104 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment()); 1105 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC); 1106 if (!success) { 1107 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), 1108 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC " 1109 "due to contention with another thread"); 1110 } 1111 return (jlong) new_cap_until_GC; 1112 WB_END 1113 1114 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb)) 1115 return (jlong) MetaspaceGC::capacity_until_GC(); 1116 WB_END 1117 1118 WB_ENTRY(void, WB_AssertMatchingSafepointCalls(JNIEnv* env, jobject o, jboolean mutexSafepointValue, jboolean attemptedNoSafepointValue)) 1119 Monitor::SafepointCheckRequired sfpt_check_required = mutexSafepointValue ? 1120 Monitor::_safepoint_check_always : 1121 Monitor::_safepoint_check_never; 1122 MutexLockerEx ml(new Mutex(Mutex::leaf, "SFPT_Test_lock", true, sfpt_check_required), 1123 attemptedNoSafepointValue == JNI_TRUE); 1124 WB_END 1125 1126 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj)) 1127 oop obj_oop = JNIHandles::resolve(obj); 1128 return (jboolean) obj_oop->mark()->has_monitor(); 1129 WB_END 1130 1131 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb)) 1132 VM_ForceSafepoint force_safepoint_op; 1133 VMThread::execute(&force_safepoint_op); 1134 WB_END 1135 1136 //Some convenience methods to deal with objects from java 1137 int WhiteBox::offset_for_field(const char* field_name, oop object, 1138 Symbol* signature_symbol) { 1139 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); 1140 Thread* THREAD = Thread::current(); 1141 1142 //Get the class of our object 1143 Klass* arg_klass = object->klass(); 1144 //Turn it into an instance-klass 1145 InstanceKlass* ik = InstanceKlass::cast(arg_klass); 1146 1147 //Create symbols to look for in the class 1148 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), 1149 THREAD); 1150 1151 //To be filled in with an offset of the field we're looking for 1152 fieldDescriptor fd; 1153 1154 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); 1155 if (res == NULL) { 1156 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), 1157 name_symbol->as_C_string()); 1158 fatal("Invalid layout of preloaded class"); 1159 } 1160 1161 //fetch the field at the offset we've found 1162 int dest_offset = fd.offset(); 1163 1164 return dest_offset; 1165 } 1166 1167 1168 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { 1169 int offset = offset_for_field(field_name, object, 1170 vmSymbols::string_signature()); 1171 oop string = object->obj_field(offset); 1172 if (string == NULL) { 1173 return NULL; 1174 } 1175 const char* ret = java_lang_String::as_utf8_string(string); 1176 return ret; 1177 } 1178 1179 bool WhiteBox::lookup_bool(const char* field_name, oop object) { 1180 int offset = 1181 offset_for_field(field_name, object, vmSymbols::bool_signature()); 1182 bool ret = (object->bool_field(offset) == JNI_TRUE); 1183 return ret; 1184 } 1185 1186 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) { 1187 ResourceMark rm; 1188 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 1189 1190 // one by one registration natives for exception catching 1191 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string()); 1192 CHECK_JNI_EXCEPTION(env); 1193 for (int i = 0, n = method_count; i < n; ++i) { 1194 // Skip dummy entries 1195 if (method_array[i].fnPtr == NULL) continue; 1196 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) { 1197 jthrowable throwable_obj = env->ExceptionOccurred(); 1198 if (throwable_obj != NULL) { 1199 env->ExceptionClear(); 1200 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) { 1201 // NoSuchMethodError is thrown when a method can't be found or a method is not native. 1202 // Ignoring the exception since it is not preventing use of other WhiteBox methods. 1203 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s", 1204 method_array[i].name, method_array[i].signature); 1205 } 1206 } else { 1207 // Registration failed unexpectedly. 1208 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered", 1209 method_array[i].name, method_array[i].signature); 1210 env->UnregisterNatives(wbclass); 1211 break; 1212 } 1213 } 1214 } 1215 } 1216 1217 #define CC (char*) 1218 1219 static JNINativeMethod methods[] = { 1220 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, 1221 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize }, 1222 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen }, 1223 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, 1224 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize }, 1225 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, 1226 {CC"parseCommandLine", 1227 CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", 1228 (void*) &WB_ParseCommandLine 1229 }, 1230 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V", 1231 (void*)&WB_AddToBootstrapClassLoaderSearch}, 1232 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V", 1233 (void*)&WB_AddToSystemClassLoaderSearch}, 1234 {CC"getCompressedOopsMaxHeapSize", CC"()J", 1235 (void*)&WB_GetCompressedOopsMaxHeapSize}, 1236 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes }, 1237 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests}, 1238 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea}, 1239 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize}, 1240 #if INCLUDE_ALL_GCS 1241 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, 1242 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, 1243 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, 1244 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, 1245 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle }, 1246 #endif // INCLUDE_ALL_GCS 1247 #if INCLUDE_NMT 1248 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc }, 1249 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack}, 1250 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree }, 1251 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory }, 1252 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory }, 1253 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory }, 1254 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory }, 1255 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported}, 1256 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel}, 1257 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize }, 1258 #endif // INCLUDE_NMT 1259 {CC"deoptimizeFrames", CC"(Z)I", (void*)&WB_DeoptimizeFrames }, 1260 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll }, 1261 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I", 1262 (void*)&WB_DeoptimizeMethod }, 1263 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z", 1264 (void*)&WB_IsMethodCompiled }, 1265 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z", 1266 (void*)&WB_IsMethodCompilable}, 1267 {CC"isMethodQueuedForCompilation", 1268 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation}, 1269 {CC"makeMethodNotCompilable", 1270 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable}, 1271 {CC"testSetDontInlineMethod", 1272 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod}, 1273 {CC"getMethodCompilationLevel", 1274 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel}, 1275 {CC"getMethodEntryBci", 1276 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci}, 1277 {CC"getCompileQueueSize", 1278 CC"(I)I", (void*)&WB_GetCompileQueueSize}, 1279 {CC"testSetForceInlineMethod", 1280 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod}, 1281 {CC"enqueueMethodForCompilation", 1282 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation}, 1283 {CC"clearMethodState", 1284 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState}, 1285 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation}, 1286 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation}, 1287 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag}, 1288 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag}, 1289 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag}, 1290 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag}, 1291 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag}, 1292 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag}, 1293 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag}, 1294 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag}, 1295 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V", 1296 (void*)&WB_SetStringVMFlag}, 1297 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;", 1298 (void*)&WB_GetBooleanVMFlag}, 1299 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1300 (void*)&WB_GetIntxVMFlag}, 1301 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1302 (void*)&WB_GetUintxVMFlag}, 1303 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1304 (void*)&WB_GetUint64VMFlag}, 1305 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1306 (void*)&WB_GetSizeTVMFlag}, 1307 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;", 1308 (void*)&WB_GetDoubleVMFlag}, 1309 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;", 1310 (void*)&WB_GetStringVMFlag}, 1311 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable }, 1312 {CC"fullGC", CC"()V", (void*)&WB_FullGC }, 1313 {CC"youngGC", CC"()V", (void*)&WB_YoungGC }, 1314 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory }, 1315 {CC"allocateMetaspace", 1316 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace }, 1317 {CC"freeMetaspace", 1318 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace }, 1319 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC }, 1320 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC }, 1321 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures }, 1322 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;", 1323 (void*)&WB_GetNMethod }, 1324 {CC"forceNMethodSweep0", CC"()Ljava/lang/Thread;", (void*)&WB_ForceNMethodSweep }, 1325 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob }, 1326 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob }, 1327 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries }, 1328 {CC"getCompilationActivityMode", 1329 CC"()I", (void*)&WB_GetCompilationActivityMode}, 1330 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob }, 1331 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize }, 1332 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize }, 1333 {CC"assertMatchingSafepointCalls", CC"(ZZ)V", (void*)&WB_AssertMatchingSafepointCalls }, 1334 {CC"isMonitorInflated", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated }, 1335 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint }, 1336 }; 1337 1338 #undef CC 1339 1340 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) 1341 { 1342 if (WhiteBoxAPI) { 1343 // Make sure that wbclass is loaded by the null classloader 1344 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); 1345 Handle loader(ikh->class_loader()); 1346 if (loader.is_null()) { 1347 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0])); 1348 WhiteBox::register_extended(env, wbclass, thread); 1349 WhiteBox::set_used(); 1350 } 1351 } 1352 } 1353 JVM_END