1 /* 2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 27 #include <new> 28 29 #include "code/codeCache.hpp" 30 #include "memory/metadataFactory.hpp" 31 #include "memory/universe.hpp" 32 #include "oops/oop.inline.hpp" 33 34 #include "classfile/stringTable.hpp" 35 #include "classfile/classLoaderData.hpp" 36 37 #include "prims/whitebox.hpp" 38 #include "prims/wbtestmethods/parserTests.hpp" 39 40 #include "runtime/thread.hpp" 41 #include "runtime/arguments.hpp" 42 #include "runtime/deoptimization.hpp" 43 #include "runtime/interfaceSupport.hpp" 44 #include "runtime/os.hpp" 45 #include "runtime/vm_version.hpp" 46 #include "runtime/sweeper.hpp" 47 48 #include "utilities/array.hpp" 49 #include "utilities/debug.hpp" 50 #include "utilities/macros.hpp" 51 #include "utilities/exceptions.hpp" 52 53 #if INCLUDE_ALL_GCS 54 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" 55 #include "gc_implementation/g1/concurrentMark.hpp" 56 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 57 #include "gc_implementation/g1/heapRegionRemSet.hpp" 58 #endif // INCLUDE_ALL_GCS 59 60 #if INCLUDE_NMT 61 #include "services/mallocSiteTable.hpp" 62 #include "services/memTracker.hpp" 63 #include "utilities/nativeCallStack.hpp" 64 #endif // INCLUDE_NMT 65 66 #include "compiler/compileBroker.hpp" 67 #include "runtime/compilationPolicy.hpp" 68 69 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 70 71 #define SIZE_T_MAX_VALUE ((size_t) -1) 72 73 bool WhiteBox::_used = false; 74 volatile bool WhiteBox::compilation_locked = false; 75 76 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) 77 return (jlong)(void*)JNIHandles::resolve(obj); 78 WB_END 79 80 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) 81 return heapOopSize; 82 WB_END 83 84 85 class WBIsKlassAliveClosure : public KlassClosure { 86 Symbol* _name; 87 bool _found; 88 public: 89 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} 90 91 void do_klass(Klass* k) { 92 if (_found) return; 93 Symbol* ksym = k->name(); 94 if (ksym->fast_compare(_name) == 0) { 95 _found = true; 96 } 97 } 98 99 bool found() const { 100 return _found; 101 } 102 }; 103 104 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) 105 Handle h_name = JNIHandles::resolve(name); 106 if (h_name.is_null()) return false; 107 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); 108 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return 109 110 WBIsKlassAliveClosure closure(sym); 111 ClassLoaderDataGraph::classes_do(&closure); 112 113 return closure.found(); 114 WB_END 115 116 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) { 117 return (jlong)Arguments::max_heap_for_compressed_oops(); 118 } 119 WB_END 120 121 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) { 122 CollectorPolicy * p = Universe::heap()->collector_policy(); 123 gclog_or_tty->print_cr("Minimum heap "SIZE_FORMAT" Initial heap " 124 SIZE_FORMAT" Maximum heap "SIZE_FORMAT" Space alignment "SIZE_FORMAT" Heap alignment "SIZE_FORMAT, 125 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(), 126 p->space_alignment(), p->heap_alignment()); 127 } 128 WB_END 129 130 #ifndef PRODUCT 131 // Forward declaration 132 void TestReservedSpace_test(); 133 void TestReserveMemorySpecial_test(); 134 void TestVirtualSpace_test(); 135 void TestMetaspaceAux_test(); 136 #endif 137 138 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o)) 139 #ifndef PRODUCT 140 TestReservedSpace_test(); 141 TestReserveMemorySpecial_test(); 142 TestVirtualSpace_test(); 143 TestMetaspaceAux_test(); 144 #endif 145 WB_END 146 147 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o)) 148 size_t granularity = os::vm_allocation_granularity(); 149 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL); 150 VirtualSpace vs; 151 vs.initialize(rhs, 50 * granularity); 152 153 //Check if constraints are complied 154 if (!( UseCompressedOops && rhs.base() != NULL && 155 Universe::narrow_oop_base() != NULL && 156 Universe::narrow_oop_use_implicit_null_checks() )) { 157 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n " 158 "\tUseCompressedOops is %d\n" 159 "\trhs.base() is "PTR_FORMAT"\n" 160 "\tUniverse::narrow_oop_base() is "PTR_FORMAT"\n" 161 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d", 162 UseCompressedOops, 163 rhs.base(), 164 Universe::narrow_oop_base(), 165 Universe::narrow_oop_use_implicit_null_checks()); 166 return; 167 } 168 tty->print_cr("Reading from no access area... "); 169 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c", 170 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 )); 171 WB_END 172 173 static jint wb_stress_virtual_space_resize(size_t reserved_space_size, 174 size_t magnitude, size_t iterations) { 175 size_t granularity = os::vm_allocation_granularity(); 176 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL); 177 VirtualSpace vs; 178 if (!vs.initialize(rhs, 0)) { 179 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed."); 180 return 3; 181 } 182 183 long seed = os::random(); 184 tty->print_cr("Random seed is %ld", seed); 185 os::init_random(seed); 186 187 for (size_t i = 0; i < iterations; i++) { 188 189 // Whether we will shrink or grow 190 bool shrink = os::random() % 2L == 0; 191 192 // Get random delta to resize virtual space 193 size_t delta = (size_t)os::random() % magnitude; 194 195 // If we are about to shrink virtual space below zero, then expand instead 196 if (shrink && vs.committed_size() < delta) { 197 shrink = false; 198 } 199 200 // Resizing by delta 201 if (shrink) { 202 vs.shrink_by(delta); 203 } else { 204 // If expanding fails expand_by will silently return false 205 vs.expand_by(delta, true); 206 } 207 } 208 return 0; 209 } 210 211 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o, 212 jlong reserved_space_size, jlong magnitude, jlong iterations)) 213 tty->print_cr("reservedSpaceSize="JLONG_FORMAT", magnitude="JLONG_FORMAT", " 214 "iterations="JLONG_FORMAT"\n", reserved_space_size, magnitude, 215 iterations); 216 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) { 217 tty->print_cr("One of variables printed above is negative. Can't proceed.\n"); 218 return 1; 219 } 220 221 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is 222 // always 8 byte. That's why we should avoid overflow in case of 32bit platform. 223 if (sizeof(size_t) < sizeof(jlong)) { 224 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE; 225 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value 226 || iterations > size_t_max_value) { 227 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n"); 228 return 2; 229 } 230 } 231 232 return wb_stress_virtual_space_resize((size_t) reserved_space_size, 233 (size_t) magnitude, (size_t) iterations); 234 WB_END 235 236 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj)) 237 oop p = JNIHandles::resolve(obj); 238 #if INCLUDE_ALL_GCS 239 if (UseG1GC) { 240 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 241 const HeapRegion* hr = g1->heap_region_containing(p); 242 if (hr == NULL) { 243 return false; 244 } 245 return !(hr->is_young()); 246 } else if (UseParallelGC) { 247 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap(); 248 return !psh->is_in_young(p); 249 } 250 #endif // INCLUDE_ALL_GCS 251 GenCollectedHeap* gch = GenCollectedHeap::heap(); 252 return !gch->is_in_young(p); 253 WB_END 254 255 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj)) 256 oop p = JNIHandles::resolve(obj); 257 return p->size() * HeapWordSize; 258 WB_END 259 260 #if INCLUDE_ALL_GCS 261 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) 262 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 263 oop result = JNIHandles::resolve(obj); 264 const HeapRegion* hr = g1->heap_region_containing(result); 265 return hr->is_humongous(); 266 WB_END 267 268 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) 269 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 270 size_t nr = g1->num_free_regions(); 271 return (jlong)nr; 272 WB_END 273 274 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) 275 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 276 ConcurrentMark* cm = g1->concurrent_mark(); 277 return cm->concurrent_marking_in_progress(); 278 WB_END 279 280 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) 281 return (jint)HeapRegion::GrainBytes; 282 WB_END 283 #endif // INCLUDE_ALL_GCS 284 285 #if INCLUDE_NMT 286 // Alloc memory using the test memory type so that we can use that to see if 287 // NMT picks it up correctly 288 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size)) 289 jlong addr = 0; 290 addr = (jlong)(uintptr_t)os::malloc(size, mtTest); 291 return addr; 292 WB_END 293 294 // Alloc memory with pseudo call stack. The test can create psudo malloc 295 // allocation site to stress the malloc tracking. 296 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack)) 297 address pc = (address)(size_t)pseudo_stack; 298 NativeCallStack stack(&pc, 1); 299 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack); 300 WB_END 301 302 // Free the memory allocated by NMTAllocTest 303 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem)) 304 os::free((void*)(uintptr_t)mem, mtTest); 305 WB_END 306 307 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size)) 308 jlong addr = 0; 309 310 addr = (jlong)(uintptr_t)os::reserve_memory(size); 311 MemTracker::record_virtual_memory_type((address)addr, mtTest); 312 313 return addr; 314 WB_END 315 316 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 317 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem); 318 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest); 319 WB_END 320 321 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 322 os::uncommit_memory((char *)(uintptr_t)addr, size); 323 WB_END 324 325 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 326 os::release_memory((char *)(uintptr_t)addr, size); 327 WB_END 328 329 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env)) 330 return MemTracker::tracking_level() == NMT_detail; 331 WB_END 332 333 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env)) 334 // Test that we can downgrade NMT levels but not upgrade them. 335 if (MemTracker::tracking_level() == NMT_off) { 336 MemTracker::transition_to(NMT_off); 337 return MemTracker::tracking_level() == NMT_off; 338 } else { 339 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking"); 340 MemTracker::transition_to(NMT_summary); 341 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now"); 342 343 // Can't go to detail once NMT is set to summary. 344 MemTracker::transition_to(NMT_detail); 345 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now"); 346 347 // Shutdown sets tracking level to minimal. 348 MemTracker::shutdown(); 349 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now"); 350 351 // Once the tracking level is minimal, we cannot increase to summary. 352 // The code ignores this request instead of asserting because if the malloc site 353 // table overflows in another thread, it tries to change the code to summary. 354 MemTracker::transition_to(NMT_summary); 355 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now"); 356 357 // Really can never go up to detail, verify that the code would never do this. 358 MemTracker::transition_to(NMT_detail); 359 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now"); 360 return MemTracker::tracking_level() == NMT_minimal; 361 } 362 WB_END 363 364 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o)) 365 int hash_size = MallocSiteTable::hash_buckets(); 366 assert(hash_size > 0, "NMT hash_size should be > 0"); 367 return (jint)hash_size; 368 WB_END 369 #endif // INCLUDE_NMT 370 371 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) { 372 assert(method != NULL, "method should not be null"); 373 ThreadToNativeFromVM ttn(thread); 374 return env->FromReflectedMethod(method); 375 } 376 377 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o)) 378 MutexLockerEx mu(Compile_lock); 379 CodeCache::mark_all_nmethods_for_deoptimization(); 380 VM_Deoptimize op; 381 VMThread::execute(&op); 382 WB_END 383 384 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 385 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 386 int result = 0; 387 CHECK_JNI_EXCEPTION_(env, result); 388 MutexLockerEx mu(Compile_lock); 389 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 390 if (is_osr) { 391 result += mh->mark_osr_nmethods(); 392 } else if (mh->code() != NULL) { 393 mh->code()->mark_for_deoptimization(); 394 ++result; 395 } 396 result += CodeCache::mark_for_deoptimization(mh()); 397 if (result > 0) { 398 VM_Deoptimize op; 399 VMThread::execute(&op); 400 } 401 return result; 402 WB_END 403 404 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 405 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 406 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 407 MutexLockerEx mu(Compile_lock); 408 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 409 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 410 if (code == NULL) { 411 return JNI_FALSE; 412 } 413 return (code->is_alive() && !code->is_marked_for_deoptimization()); 414 WB_END 415 416 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 417 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 418 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 419 MutexLockerEx mu(Compile_lock); 420 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 421 if (is_osr) { 422 return CompilationPolicy::can_be_osr_compiled(mh, comp_level); 423 } else { 424 return CompilationPolicy::can_be_compiled(mh, comp_level); 425 } 426 WB_END 427 428 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method)) 429 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 430 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 431 MutexLockerEx mu(Compile_lock); 432 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 433 return mh->queued_for_compilation(); 434 WB_END 435 436 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 437 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 438 CHECK_JNI_EXCEPTION_(env, CompLevel_none); 439 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 440 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 441 return (code != NULL ? code->comp_level() : CompLevel_none); 442 WB_END 443 444 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 445 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 446 CHECK_JNI_EXCEPTION(env); 447 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 448 if (is_osr) { 449 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox"); 450 } else { 451 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox"); 452 } 453 WB_END 454 455 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method)) 456 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 457 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci); 458 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 459 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false); 460 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci); 461 WB_END 462 463 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 464 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 465 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 466 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 467 bool result = mh->dont_inline(); 468 mh->set_dont_inline(value == JNI_TRUE); 469 return result; 470 WB_END 471 472 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level)) 473 if (comp_level == CompLevel_any) { 474 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ + 475 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */; 476 } else { 477 return CompileBroker::queue_size(comp_level); 478 } 479 WB_END 480 481 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 482 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 483 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 484 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 485 bool result = mh->force_inline(); 486 mh->set_force_inline(value == JNI_TRUE); 487 return result; 488 WB_END 489 490 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci)) 491 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 492 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 493 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 494 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD); 495 MutexLockerEx mu(Compile_lock); 496 return (mh->queued_for_compilation() || nm != NULL); 497 WB_END 498 499 class VM_WhiteBoxOperation : public VM_Operation { 500 public: 501 VM_WhiteBoxOperation() { } 502 VMOp_Type type() const { return VMOp_WhiteBoxOperation; } 503 bool allow_nested_vm_operations() const { return true; } 504 }; 505 506 class AlwaysFalseClosure : public BoolObjectClosure { 507 public: 508 bool do_object_b(oop p) { return false; } 509 }; 510 511 static AlwaysFalseClosure always_false; 512 513 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method)) 514 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 515 CHECK_JNI_EXCEPTION(env); 516 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 517 MutexLockerEx mu(Compile_lock); 518 MethodData* mdo = mh->method_data(); 519 MethodCounters* mcs = mh->method_counters(); 520 521 if (mdo != NULL) { 522 mdo->init(); 523 ResourceMark rm; 524 int arg_count = mdo->method()->size_of_parameters(); 525 for (int i = 0; i < arg_count; i++) { 526 mdo->set_arg_modified(i, 0); 527 } 528 MutexLockerEx mu(mdo->extra_data_lock()); 529 mdo->clean_method_data(&always_false); 530 } 531 532 mh->clear_not_c1_compilable(); 533 mh->clear_not_c2_compilable(); 534 mh->clear_not_c2_osr_compilable(); 535 NOT_PRODUCT(mh->set_compiled_invocation_count(0)); 536 if (mcs != NULL) { 537 mcs->backedge_counter()->init(); 538 mcs->invocation_counter()->init(); 539 mcs->set_interpreter_invocation_count(0); 540 mcs->set_interpreter_throwout_count(0); 541 542 #ifdef TIERED 543 mcs->set_rate(0.0F); 544 mh->set_prev_event_count(0); 545 mh->set_prev_time(0); 546 #endif 547 } 548 WB_END 549 550 template <typename T> 551 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) { 552 if (name == NULL) { 553 return false; 554 } 555 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 556 const char* flag_name = env->GetStringUTFChars(name, NULL); 557 bool result = (*TAt)(flag_name, value, true, true); 558 env->ReleaseStringUTFChars(name, flag_name); 559 return result; 560 } 561 562 template <typename T> 563 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) { 564 if (name == NULL) { 565 return false; 566 } 567 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 568 const char* flag_name = env->GetStringUTFChars(name, NULL); 569 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL); 570 env->ReleaseStringUTFChars(name, flag_name); 571 return result; 572 } 573 574 template <typename T> 575 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) { 576 ResourceMark rm(thread); 577 jclass clazz = env->FindClass(name->as_C_string()); 578 CHECK_JNI_EXCEPTION_(env, NULL); 579 jmethodID methodID = env->GetStaticMethodID(clazz, 580 vmSymbols::valueOf_name()->as_C_string(), 581 sig->as_C_string()); 582 CHECK_JNI_EXCEPTION_(env, NULL); 583 jobject result = env->CallStaticObjectMethod(clazz, methodID, value); 584 CHECK_JNI_EXCEPTION_(env, NULL); 585 return result; 586 } 587 588 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) { 589 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value); 590 } 591 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) { 592 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value); 593 } 594 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) { 595 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value); 596 } 597 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) { 598 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value); 599 }*/ 600 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) { 601 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value); 602 } 603 604 static Flag* getVMFlag(JavaThread* thread, JNIEnv* env, jstring name) { 605 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 606 const char* flag_name = env->GetStringUTFChars(name, NULL); 607 Flag* result = Flag::find_flag(flag_name, strlen(flag_name), true, true); 608 env->ReleaseStringUTFChars(name, flag_name); 609 return result; 610 } 611 612 WB_ENTRY(jboolean, WB_IsConstantVMFlag(JNIEnv* env, jobject o, jstring name)) 613 Flag* flag = getVMFlag(thread, env, name); 614 return (flag != NULL) && flag->is_constant_in_binary(); 615 WB_END 616 617 WB_ENTRY(jboolean, WB_IsLockedVMFlag(JNIEnv* env, jobject o, jstring name)) 618 Flag* flag = getVMFlag(thread, env, name); 619 return (flag != NULL) && !(flag->is_unlocked() || flag->is_unlocker()); 620 WB_END 621 622 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name)) 623 bool result; 624 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) { 625 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 626 return booleanBox(thread, env, result); 627 } 628 return NULL; 629 WB_END 630 631 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name)) 632 intx result; 633 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) { 634 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 635 return longBox(thread, env, result); 636 } 637 return NULL; 638 WB_END 639 640 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name)) 641 uintx result; 642 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) { 643 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 644 return longBox(thread, env, result); 645 } 646 return NULL; 647 WB_END 648 649 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name)) 650 uint64_t result; 651 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) { 652 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 653 return longBox(thread, env, result); 654 } 655 return NULL; 656 WB_END 657 658 WB_ENTRY(jobject, WB_GetSizeTVMFlag(JNIEnv* env, jobject o, jstring name)) 659 uintx result; 660 if (GetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAt)) { 661 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 662 return longBox(thread, env, result); 663 } 664 return NULL; 665 WB_END 666 667 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name)) 668 double result; 669 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) { 670 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 671 return doubleBox(thread, env, result); 672 } 673 return NULL; 674 WB_END 675 676 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name)) 677 ccstr ccstrResult; 678 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) { 679 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 680 jstring result = env->NewStringUTF(ccstrResult); 681 CHECK_JNI_EXCEPTION_(env, NULL); 682 return result; 683 } 684 return NULL; 685 WB_END 686 687 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value)) 688 bool result = value == JNI_TRUE ? true : false; 689 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut); 690 WB_END 691 692 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 693 intx result = value; 694 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut); 695 WB_END 696 697 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 698 uintx result = value; 699 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut); 700 WB_END 701 702 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 703 uint64_t result = value; 704 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut); 705 WB_END 706 707 WB_ENTRY(void, WB_SetSizeTVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 708 size_t result = value; 709 SetVMFlag <size_t> (thread, env, name, &result, &CommandLineFlags::size_tAtPut); 710 WB_END 711 712 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value)) 713 double result = value; 714 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut); 715 WB_END 716 717 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value)) 718 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 719 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL); 720 ccstr ccstrResult = ccstrValue; 721 bool needFree; 722 { 723 ThreadInVMfromNative ttvfn(thread); // back to VM 724 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut); 725 } 726 if (value != NULL) { 727 env->ReleaseStringUTFChars(value, ccstrValue); 728 } 729 if (needFree) { 730 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal); 731 } 732 WB_END 733 734 735 WB_ENTRY(void, WB_LockCompilation(JNIEnv* env, jobject o, jlong timeout)) 736 WhiteBox::compilation_locked = true; 737 WB_END 738 739 WB_ENTRY(void, WB_UnlockCompilation(JNIEnv* env, jobject o)) 740 MonitorLockerEx mo(Compilation_lock, Mutex::_no_safepoint_check_flag); 741 WhiteBox::compilation_locked = false; 742 mo.notify_all(); 743 WB_END 744 745 void WhiteBox::force_sweep() { 746 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled"); 747 { 748 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 749 NMethodSweeper::_should_sweep = true; 750 } 751 NMethodSweeper::possibly_sweep(); 752 } 753 754 WB_ENTRY(void, WB_ForceNMethodSweep(JNIEnv* env, jobject o)) 755 WhiteBox::force_sweep(); 756 WB_END 757 758 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString)) 759 ResourceMark rm(THREAD); 760 int len; 761 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false); 762 return (StringTable::lookup(name, len) != NULL); 763 WB_END 764 765 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o)) 766 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true); 767 Universe::heap()->collect(GCCause::_last_ditch_collection); 768 #if INCLUDE_ALL_GCS 769 if (UseG1GC) { 770 // Needs to be cleared explicitly for G1 771 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false); 772 } 773 #endif // INCLUDE_ALL_GCS 774 WB_END 775 776 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o)) 777 Universe::heap()->collect(GCCause::_wb_young_gc); 778 WB_END 779 780 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o)) 781 // static+volatile in order to force the read to happen 782 // (not be eliminated by the compiler) 783 static char c; 784 static volatile char* p; 785 786 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0); 787 if (p == NULL) { 788 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory"); 789 } 790 791 c = *p; 792 WB_END 793 794 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o)) 795 const char* cpu_features = VM_Version::cpu_features(); 796 ThreadToNativeFromVM ttn(thread); 797 jstring features_string = env->NewStringUTF(cpu_features); 798 799 CHECK_JNI_EXCEPTION_(env, NULL); 800 801 return features_string; 802 WB_END 803 804 int WhiteBox::get_blob_type(const CodeBlob* code) { 805 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled"); 806 return CodeCache::get_code_heap(code)->code_blob_type(); 807 } 808 809 CodeHeap* WhiteBox::get_code_heap(int blob_type) { 810 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled"); 811 return CodeCache::get_code_heap(blob_type); 812 } 813 814 struct CodeBlobStub { 815 CodeBlobStub(const CodeBlob* blob) : 816 name(os::strdup(blob->name())), 817 size(blob->size()), 818 blob_type(WhiteBox::get_blob_type(blob)) { } 819 ~CodeBlobStub() { os::free((void*) name); } 820 const char* const name; 821 const int size; 822 const int blob_type; 823 }; 824 825 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) { 826 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 827 CHECK_JNI_EXCEPTION_(env, NULL); 828 jobjectArray result = env->NewObjectArray(3, clazz, NULL); 829 830 jstring name = env->NewStringUTF(cb->name); 831 CHECK_JNI_EXCEPTION_(env, NULL); 832 env->SetObjectArrayElement(result, 0, name); 833 834 jobject obj = integerBox(thread, env, cb->size); 835 CHECK_JNI_EXCEPTION_(env, NULL); 836 env->SetObjectArrayElement(result, 1, obj); 837 838 obj = integerBox(thread, env, cb->blob_type); 839 CHECK_JNI_EXCEPTION_(env, NULL); 840 env->SetObjectArrayElement(result, 2, obj); 841 842 return result; 843 } 844 845 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 846 ResourceMark rm(THREAD); 847 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 848 CHECK_JNI_EXCEPTION_(env, NULL); 849 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 850 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 851 jobjectArray result = NULL; 852 if (code == NULL) { 853 return result; 854 } 855 int insts_size = code->insts_size(); 856 857 ThreadToNativeFromVM ttn(thread); 858 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 859 CHECK_JNI_EXCEPTION_(env, NULL); 860 result = env->NewObjectArray(4, clazz, NULL); 861 if (result == NULL) { 862 return result; 863 } 864 865 CodeBlobStub stub(code); 866 jobjectArray codeBlob = codeBlob2objectArray(thread, env, &stub); 867 env->SetObjectArrayElement(result, 0, codeBlob); 868 869 jobject level = integerBox(thread, env, code->comp_level()); 870 CHECK_JNI_EXCEPTION_(env, NULL); 871 env->SetObjectArrayElement(result, 1, level); 872 873 jbyteArray insts = env->NewByteArray(insts_size); 874 CHECK_JNI_EXCEPTION_(env, NULL); 875 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin()); 876 env->SetObjectArrayElement(result, 2, insts); 877 878 jobject id = integerBox(thread, env, code->compile_id()); 879 CHECK_JNI_EXCEPTION_(env, NULL); 880 env->SetObjectArrayElement(result, 3, id); 881 882 return result; 883 WB_END 884 885 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) { 886 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to enabled"); 887 BufferBlob* blob; 888 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob)); 889 if (full_size < size) { 890 full_size += round_to(size - full_size, oopSize); 891 } 892 { 893 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 894 blob = (BufferBlob*) CodeCache::allocate(full_size, blob_type); 895 } 896 // Track memory usage statistic after releasing CodeCache_lock 897 MemoryService::track_code_cache_memory_usage(); 898 ::new (blob) BufferBlob("WB::DummyBlob", full_size); 899 return blob; 900 } 901 902 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type)) 903 return (jlong) WhiteBox::allocate_code_blob(size, blob_type); 904 WB_END 905 906 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr)) 907 BufferBlob::free((BufferBlob*) addr); 908 WB_END 909 910 WB_ENTRY(jobjectArray, WB_GetCodeHeapEntries(JNIEnv* env, jobject o, jint blob_type)) 911 ResourceMark rm; 912 GrowableArray<CodeBlobStub*> blobs; 913 { 914 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 915 CodeHeap* heap = WhiteBox::get_code_heap(blob_type); 916 if (heap == NULL) { 917 return NULL; 918 } 919 for (CodeBlob* cb = (CodeBlob*) heap->first(); 920 cb != NULL; cb = (CodeBlob*) heap->next(cb)) { 921 CodeBlobStub* stub = NEW_RESOURCE_OBJ(CodeBlobStub); 922 new (stub) CodeBlobStub(cb); 923 blobs.append(stub); 924 } 925 } 926 if (blobs.length() == 0) { 927 return NULL; 928 } 929 ThreadToNativeFromVM ttn(thread); 930 jobjectArray result = NULL; 931 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 932 CHECK_JNI_EXCEPTION_(env, NULL); 933 result = env->NewObjectArray(blobs.length(), clazz, NULL); 934 if (result == NULL) { 935 return result; 936 } 937 int i = 0; 938 for (GrowableArrayIterator<CodeBlobStub*> it = blobs.begin(); 939 it != blobs.end(); ++it) { 940 jobjectArray obj = codeBlob2objectArray(thread, env, *it); 941 env->SetObjectArrayElement(result, i, obj); 942 ++i; 943 } 944 return result; 945 WB_END 946 947 WB_ENTRY(jint, WB_GetCompilationActivityMode(JNIEnv* env, jobject o)) 948 return CompileBroker::get_compilation_activity_mode(); 949 WB_END 950 951 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr)) 952 ThreadToNativeFromVM ttn(thread); 953 CodeBlobStub stub((CodeBlob*) addr); 954 return codeBlob2objectArray(thread, env, &stub); 955 WB_END 956 957 WB_ENTRY(jlong, WB_GetThreadStackSize(JNIEnv* env, jobject o)) 958 return (jlong) Thread::current()->stack_size(); 959 WB_END 960 961 WB_ENTRY(jlong, WB_GetThreadRemainingStackSize(JNIEnv* env, jobject o)) 962 JavaThread* t = JavaThread::current(); 963 return (jlong) t->stack_available(os::current_stack_pointer()) - (jlong) StackShadowPages * os::vm_page_size(); 964 WB_END 965 966 int WhiteBox::array_bytes_to_length(size_t bytes) { 967 return Array<u1>::bytes_to_length(bytes); 968 } 969 970 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size)) 971 if (size < 0) { 972 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 973 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size)); 974 } 975 976 oop class_loader_oop = JNIHandles::resolve(class_loader); 977 ClassLoaderData* cld = class_loader_oop != NULL 978 ? java_lang_ClassLoader::loader_data(class_loader_oop) 979 : ClassLoaderData::the_null_class_loader_data(); 980 981 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread); 982 983 return (jlong)(uintptr_t)metadata; 984 WB_END 985 986 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size)) 987 oop class_loader_oop = JNIHandles::resolve(class_loader); 988 ClassLoaderData* cld = class_loader_oop != NULL 989 ? java_lang_ClassLoader::loader_data(class_loader_oop) 990 : ClassLoaderData::the_null_class_loader_data(); 991 992 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr); 993 WB_END 994 995 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc)) 996 if (inc < 0) { 997 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 998 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc)); 999 } 1000 1001 jlong max_size_t = (jlong) ((size_t) -1); 1002 if (inc > max_size_t) { 1003 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1004 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc)); 1005 } 1006 1007 size_t new_cap_until_GC = 0; 1008 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment()); 1009 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC); 1010 if (!success) { 1011 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), 1012 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC " 1013 "due to contention with another thread"); 1014 } 1015 return (jlong) new_cap_until_GC; 1016 WB_END 1017 1018 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb)) 1019 return (jlong) MetaspaceGC::capacity_until_GC(); 1020 WB_END 1021 1022 //Some convenience methods to deal with objects from java 1023 int WhiteBox::offset_for_field(const char* field_name, oop object, 1024 Symbol* signature_symbol) { 1025 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); 1026 Thread* THREAD = Thread::current(); 1027 1028 //Get the class of our object 1029 Klass* arg_klass = object->klass(); 1030 //Turn it into an instance-klass 1031 InstanceKlass* ik = InstanceKlass::cast(arg_klass); 1032 1033 //Create symbols to look for in the class 1034 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), 1035 THREAD); 1036 1037 //To be filled in with an offset of the field we're looking for 1038 fieldDescriptor fd; 1039 1040 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); 1041 if (res == NULL) { 1042 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), 1043 name_symbol->as_C_string()); 1044 fatal("Invalid layout of preloaded class"); 1045 } 1046 1047 //fetch the field at the offset we've found 1048 int dest_offset = fd.offset(); 1049 1050 return dest_offset; 1051 } 1052 1053 1054 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { 1055 int offset = offset_for_field(field_name, object, 1056 vmSymbols::string_signature()); 1057 oop string = object->obj_field(offset); 1058 if (string == NULL) { 1059 return NULL; 1060 } 1061 const char* ret = java_lang_String::as_utf8_string(string); 1062 return ret; 1063 } 1064 1065 bool WhiteBox::lookup_bool(const char* field_name, oop object) { 1066 int offset = 1067 offset_for_field(field_name, object, vmSymbols::bool_signature()); 1068 bool ret = (object->bool_field(offset) == JNI_TRUE); 1069 return ret; 1070 } 1071 1072 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) { 1073 ResourceMark rm; 1074 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 1075 1076 // one by one registration natives for exception catching 1077 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string()); 1078 CHECK_JNI_EXCEPTION(env); 1079 for (int i = 0, n = method_count; i < n; ++i) { 1080 // Skip dummy entries 1081 if (method_array[i].fnPtr == NULL) continue; 1082 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) { 1083 jthrowable throwable_obj = env->ExceptionOccurred(); 1084 if (throwable_obj != NULL) { 1085 env->ExceptionClear(); 1086 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) { 1087 // NoSuchMethodError is thrown when a method can't be found or a method is not native. 1088 // Ignoring the exception since it is not preventing use of other WhiteBox methods. 1089 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s", 1090 method_array[i].name, method_array[i].signature); 1091 } 1092 } else { 1093 // Registration failed unexpectedly. 1094 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered", 1095 method_array[i].name, method_array[i].signature); 1096 env->UnregisterNatives(wbclass); 1097 break; 1098 } 1099 } 1100 } 1101 } 1102 1103 #define CC (char*) 1104 1105 static JNINativeMethod methods[] = { 1106 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, 1107 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize }, 1108 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen }, 1109 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, 1110 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, 1111 {CC"parseCommandLine", 1112 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", 1113 (void*) &WB_ParseCommandLine 1114 }, 1115 {CC"getCompressedOopsMaxHeapSize", CC"()J", 1116 (void*)&WB_GetCompressedOopsMaxHeapSize}, 1117 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes }, 1118 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests}, 1119 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea}, 1120 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize}, 1121 #if INCLUDE_ALL_GCS 1122 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, 1123 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, 1124 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, 1125 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, 1126 #endif // INCLUDE_ALL_GCS 1127 #if INCLUDE_NMT 1128 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc }, 1129 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack}, 1130 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree }, 1131 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory }, 1132 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory }, 1133 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory }, 1134 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory }, 1135 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported}, 1136 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel}, 1137 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize }, 1138 #endif // INCLUDE_NMT 1139 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll }, 1140 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I", 1141 (void*)&WB_DeoptimizeMethod }, 1142 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z", 1143 (void*)&WB_IsMethodCompiled }, 1144 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z", 1145 (void*)&WB_IsMethodCompilable}, 1146 {CC"isMethodQueuedForCompilation", 1147 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation}, 1148 {CC"makeMethodNotCompilable", 1149 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable}, 1150 {CC"testSetDontInlineMethod", 1151 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod}, 1152 {CC"getMethodCompilationLevel", 1153 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel}, 1154 {CC"getMethodEntryBci", 1155 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci}, 1156 {CC"getCompileQueueSize", 1157 CC"(I)I", (void*)&WB_GetCompileQueueSize}, 1158 {CC"testSetForceInlineMethod", 1159 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod}, 1160 {CC"enqueueMethodForCompilation", 1161 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation}, 1162 {CC"clearMethodState", 1163 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState}, 1164 {CC"lockCompilation", CC"()V", (void*)&WB_LockCompilation}, 1165 {CC"unlockCompilation", CC"()V", (void*)&WB_UnlockCompilation}, 1166 {CC"isConstantVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsConstantVMFlag}, 1167 {CC"isLockedVMFlag", CC"(Ljava/lang/String;)Z", (void*)&WB_IsLockedVMFlag}, 1168 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag}, 1169 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag}, 1170 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag}, 1171 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag}, 1172 {CC"setSizeTVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetSizeTVMFlag}, 1173 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag}, 1174 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V", 1175 (void*)&WB_SetStringVMFlag}, 1176 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;", 1177 (void*)&WB_GetBooleanVMFlag}, 1178 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1179 (void*)&WB_GetIntxVMFlag}, 1180 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1181 (void*)&WB_GetUintxVMFlag}, 1182 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1183 (void*)&WB_GetUint64VMFlag}, 1184 {CC"getSizeTVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1185 (void*)&WB_GetSizeTVMFlag}, 1186 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;", 1187 (void*)&WB_GetDoubleVMFlag}, 1188 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;", 1189 (void*)&WB_GetStringVMFlag}, 1190 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable }, 1191 {CC"fullGC", CC"()V", (void*)&WB_FullGC }, 1192 {CC"youngGC", CC"()V", (void*)&WB_YoungGC }, 1193 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory }, 1194 {CC"allocateMetaspace", 1195 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace }, 1196 {CC"freeMetaspace", 1197 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace }, 1198 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC }, 1199 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC }, 1200 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures }, 1201 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;", 1202 (void*)&WB_GetNMethod }, 1203 {CC"forceNMethodSweep", CC"()V", (void*)&WB_ForceNMethodSweep }, 1204 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob }, 1205 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob }, 1206 {CC"getCodeHeapEntries", CC"(I)[Ljava/lang/Object;",(void*)&WB_GetCodeHeapEntries }, 1207 {CC"getCompilationActivityMode", 1208 CC"()I", (void*)&WB_GetCompilationActivityMode}, 1209 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob }, 1210 {CC"getThreadStackSize", CC"()J", (void*)&WB_GetThreadStackSize }, 1211 {CC"getThreadRemainingStackSize", CC"()J", (void*)&WB_GetThreadRemainingStackSize }, 1212 }; 1213 1214 #undef CC 1215 1216 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) 1217 { 1218 if (WhiteBoxAPI) { 1219 // Make sure that wbclass is loaded by the null classloader 1220 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); 1221 Handle loader(ikh->class_loader()); 1222 if (loader.is_null()) { 1223 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0])); 1224 WhiteBox::register_extended(env, wbclass, thread); 1225 WhiteBox::set_used(); 1226 } 1227 } 1228 } 1229 JVM_END