1 /* 2 * Copyright (c) 2012, 2018, 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 "memory/metadataFactory.hpp" 28 #include "memory/metaspaceShared.hpp" 29 #include "memory/universe.hpp" 30 #include "oops/oop.inline.hpp" 31 32 #include "classfile/symbolTable.hpp" 33 #include "classfile/classLoaderData.hpp" 34 35 #include "prims/whitebox.hpp" 36 #include "prims/wbtestmethods/parserTests.hpp" 37 38 #include "runtime/arguments.hpp" 39 #include "runtime/interfaceSupport.hpp" 40 #include "runtime/os.hpp" 41 #include "utilities/array.hpp" 42 #include "utilities/align.hpp" 43 #include "utilities/debug.hpp" 44 #include "utilities/macros.hpp" 45 #include "utilities/exceptions.hpp" 46 47 #if INCLUDE_ALL_GCS 48 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" 49 #include "gc_implementation/g1/concurrentMark.hpp" 50 #include "gc_implementation/g1/concurrentMarkThread.hpp" 51 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 52 #include "gc_implementation/g1/heapRegionRemSet.hpp" 53 #endif // INCLUDE_ALL_GCS 54 55 #if INCLUDE_NMT 56 #include "services/mallocSiteTable.hpp" 57 #include "services/memTracker.hpp" 58 #include "utilities/nativeCallStack.hpp" 59 #endif // INCLUDE_NMT 60 61 #include "compiler/compileBroker.hpp" 62 #include "jvmtifiles/jvmtiEnv.hpp" 63 #include "runtime/compilationPolicy.hpp" 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 71 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) 72 return (jlong)(void*)JNIHandles::resolve(obj); 73 WB_END 74 75 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) 76 return heapOopSize; 77 WB_END 78 79 WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o)) 80 return os::vm_page_size(); 81 WB_END 82 83 WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o)) 84 return os::large_page_size(); 85 WB_END 86 87 class WBIsKlassAliveClosure : public KlassClosure { 88 Symbol* _name; 89 bool _found; 90 public: 91 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} 92 93 void do_klass(Klass* k) { 94 if (_found) return; 95 Symbol* ksym = k->name(); 96 if (ksym->fast_compare(_name) == 0) { 97 _found = true; 98 } 99 } 100 101 bool found() const { 102 return _found; 103 } 104 }; 105 106 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) 107 Handle h_name = JNIHandles::resolve(name); 108 if (h_name.is_null()) return false; 109 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); 110 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return 111 112 WBIsKlassAliveClosure closure(sym); 113 ClassLoaderDataGraph::classes_do(&closure); 114 115 return closure.found(); 116 WB_END 117 118 WB_ENTRY(jboolean, WB_ClassKnownToNotExist(JNIEnv* env, jobject o, jobject loader, jstring name)) 119 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 120 const char* class_name = env->GetStringUTFChars(name, NULL); 121 jboolean result = JVM_KnownToNotExist(env, loader, class_name); 122 env->ReleaseStringUTFChars(name, class_name); 123 return result; 124 WB_END 125 126 WB_ENTRY(jobjectArray, WB_GetLookupCacheURLs(JNIEnv* env, jobject o, jobject loader)) 127 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 128 return JVM_GetResourceLookupCacheURLs(env, loader); 129 WB_END 130 131 WB_ENTRY(jintArray, WB_GetLookupCacheMatches(JNIEnv* env, jobject o, jobject loader, jstring name)) 132 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 133 const char* resource_name = env->GetStringUTFChars(name, NULL); 134 jintArray result = JVM_GetResourceLookupCache(env, loader, resource_name); 135 136 env->ReleaseStringUTFChars(name, resource_name); 137 return result; 138 WB_END 139 140 WB_ENTRY(void, WB_AddToBootstrapClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) { 141 #if INCLUDE_JVMTI 142 ResourceMark rm; 143 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment)); 144 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION); 145 jvmtiError err = jvmti_env->AddToBootstrapClassLoaderSearch(seg); 146 assert(err == JVMTI_ERROR_NONE, "must not fail"); 147 #endif 148 } 149 WB_END 150 151 WB_ENTRY(void, WB_AddToSystemClassLoaderSearch(JNIEnv* env, jobject o, jstring segment)) { 152 #if INCLUDE_JVMTI 153 ResourceMark rm; 154 const char* seg = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(segment)); 155 JvmtiEnv* jvmti_env = JvmtiEnv::create_a_jvmti(JVMTI_VERSION); 156 jvmtiError err = jvmti_env->AddToSystemClassLoaderSearch(seg); 157 assert(err == JVMTI_ERROR_NONE, "must not fail"); 158 #endif 159 } 160 WB_END 161 162 #ifdef LINUX 163 #include "utilities/elfFile.hpp" 164 #include "osContainer_linux.hpp" 165 #endif 166 167 WB_ENTRY(jlong, WB_GetCompressedOopsMaxHeapSize(JNIEnv* env, jobject o)) { 168 return (jlong)Arguments::max_heap_for_compressed_oops(); 169 } 170 WB_END 171 172 WB_ENTRY(void, WB_PrintHeapSizes(JNIEnv* env, jobject o)) { 173 CollectorPolicy * p = Universe::heap()->collector_policy(); 174 gclog_or_tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap " 175 SIZE_FORMAT" Maximum heap " SIZE_FORMAT " Min alignment " SIZE_FORMAT " Max alignment " SIZE_FORMAT, 176 p->min_heap_byte_size(), p->initial_heap_byte_size(), p->max_heap_byte_size(), 177 p->space_alignment(), p->heap_alignment()); 178 } 179 WB_END 180 181 #ifndef PRODUCT 182 // Forward declaration 183 void TestReservedSpace_test(); 184 void TestReserveMemorySpecial_test(); 185 void TestVirtualSpace_test(); 186 void TestMetaspaceAux_test(); 187 #endif 188 189 WB_ENTRY(void, WB_RunMemoryUnitTests(JNIEnv* env, jobject o)) 190 #ifndef PRODUCT 191 TestReservedSpace_test(); 192 TestReserveMemorySpecial_test(); 193 TestVirtualSpace_test(); 194 TestMetaspaceAux_test(); 195 #endif 196 WB_END 197 198 WB_ENTRY(void, WB_ReadFromNoaccessArea(JNIEnv* env, jobject o)) 199 size_t granularity = os::vm_allocation_granularity(); 200 ReservedHeapSpace rhs(100 * granularity, granularity, false, NULL); 201 VirtualSpace vs; 202 vs.initialize(rhs, 50 * granularity); 203 204 //Check if constraints are complied 205 if (!( UseCompressedOops && rhs.base() != NULL && 206 Universe::narrow_oop_base() != NULL && 207 Universe::narrow_oop_use_implicit_null_checks() )) { 208 tty->print_cr("WB_ReadFromNoaccessArea method is useless:\n " 209 "\tUseCompressedOops is %d\n" 210 "\trhs.base() is " PTR_FORMAT "\n" 211 "\tUniverse::narrow_oop_base() is " PTR_FORMAT "\n" 212 "\tUniverse::narrow_oop_use_implicit_null_checks() is %d", 213 UseCompressedOops, 214 rhs.base(), 215 Universe::narrow_oop_base(), 216 Universe::narrow_oop_use_implicit_null_checks()); 217 return; 218 } 219 tty->print_cr("Reading from no access area... "); 220 tty->print_cr("*(vs.low_boundary() - rhs.noaccess_prefix() / 2 ) = %c", 221 *(vs.low_boundary() - rhs.noaccess_prefix() / 2 )); 222 WB_END 223 224 static jint wb_stress_virtual_space_resize(size_t reserved_space_size, 225 size_t magnitude, size_t iterations) { 226 size_t granularity = os::vm_allocation_granularity(); 227 ReservedHeapSpace rhs(reserved_space_size * granularity, granularity, false, NULL); 228 VirtualSpace vs; 229 if (!vs.initialize(rhs, 0)) { 230 tty->print_cr("Failed to initialize VirtualSpace. Can't proceed."); 231 return 3; 232 } 233 234 long seed = os::random(); 235 tty->print_cr("Random seed is %ld", seed); 236 os::init_random(seed); 237 238 for (size_t i = 0; i < iterations; i++) { 239 240 // Whether we will shrink or grow 241 bool shrink = os::random() % 2L == 0; 242 243 // Get random delta to resize virtual space 244 size_t delta = (size_t)os::random() % magnitude; 245 246 // If we are about to shrink virtual space below zero, then expand instead 247 if (shrink && vs.committed_size() < delta) { 248 shrink = false; 249 } 250 251 // Resizing by delta 252 if (shrink) { 253 vs.shrink_by(delta); 254 } else { 255 // If expanding fails expand_by will silently return false 256 vs.expand_by(delta, true); 257 } 258 } 259 return 0; 260 } 261 262 WB_ENTRY(jint, WB_StressVirtualSpaceResize(JNIEnv* env, jobject o, 263 jlong reserved_space_size, jlong magnitude, jlong iterations)) 264 tty->print_cr("reservedSpaceSize=" JLONG_FORMAT ", magnitude=" JLONG_FORMAT ", " 265 "iterations=" JLONG_FORMAT "\n", reserved_space_size, magnitude, 266 iterations); 267 if (reserved_space_size < 0 || magnitude < 0 || iterations < 0) { 268 tty->print_cr("One of variables printed above is negative. Can't proceed.\n"); 269 return 1; 270 } 271 272 // sizeof(size_t) depends on whether OS is 32bit or 64bit. sizeof(jlong) is 273 // always 8 byte. That's why we should avoid overflow in case of 32bit platform. 274 if (sizeof(size_t) < sizeof(jlong)) { 275 jlong size_t_max_value = (jlong) SIZE_T_MAX_VALUE; 276 if (reserved_space_size > size_t_max_value || magnitude > size_t_max_value 277 || iterations > size_t_max_value) { 278 tty->print_cr("One of variables printed above overflows size_t. Can't proceed.\n"); 279 return 2; 280 } 281 } 282 283 return wb_stress_virtual_space_resize((size_t) reserved_space_size, 284 (size_t) magnitude, (size_t) iterations); 285 WB_END 286 287 WB_ENTRY(jboolean, WB_isObjectInOldGen(JNIEnv* env, jobject o, jobject obj)) 288 oop p = JNIHandles::resolve(obj); 289 #if INCLUDE_ALL_GCS 290 if (UseG1GC) { 291 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 292 const HeapRegion* hr = g1->heap_region_containing(p); 293 if (hr == NULL) { 294 return false; 295 } 296 return !(hr->is_young()); 297 } else if (UseParallelGC) { 298 ParallelScavengeHeap* psh = ParallelScavengeHeap::heap(); 299 return !psh->is_in_young(p); 300 } 301 #endif // INCLUDE_ALL_GCS 302 GenCollectedHeap* gch = GenCollectedHeap::heap(); 303 return !gch->is_in_young(p); 304 WB_END 305 306 WB_ENTRY(jlong, WB_GetObjectSize(JNIEnv* env, jobject o, jobject obj)) 307 oop p = JNIHandles::resolve(obj); 308 return p->size() * HeapWordSize; 309 WB_END 310 311 #if INCLUDE_ALL_GCS 312 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) 313 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 314 oop result = JNIHandles::resolve(obj); 315 const HeapRegion* hr = g1->heap_region_containing(result); 316 return hr->isHumongous(); 317 WB_END 318 319 WB_ENTRY(jlong, WB_G1NumMaxRegions(JNIEnv* env, jobject o)) 320 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 321 size_t nr = g1->max_regions(); 322 return (jlong)nr; 323 WB_END 324 325 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) 326 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 327 size_t nr = g1->num_free_regions(); 328 return (jlong)nr; 329 WB_END 330 331 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) 332 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 333 return g1->concurrent_mark()->cmThread()->during_cycle(); 334 WB_END 335 336 WB_ENTRY(jboolean, WB_G1StartMarkCycle(JNIEnv* env, jobject o)) 337 G1CollectedHeap* g1h = G1CollectedHeap::heap(); 338 if (!g1h->concurrent_mark()->cmThread()->during_cycle()) { 339 g1h->collect(GCCause::_wb_conc_mark); 340 return true; 341 } 342 return false; 343 WB_END 344 345 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) 346 return (jint)HeapRegion::GrainBytes; 347 WB_END 348 349 WB_ENTRY(jobject, WB_G1AuxiliaryMemoryUsage(JNIEnv* env)) 350 ResourceMark rm(THREAD); 351 G1CollectedHeap* g1h = G1CollectedHeap::heap(); 352 MemoryUsage usage = g1h->get_auxiliary_data_memory_usage(); 353 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); 354 return JNIHandles::make_local(env, h()); 355 WB_END 356 #endif // INCLUDE_ALL_GCS 357 358 #if INCLUDE_NMT 359 // Alloc memory using the test memory type so that we can use that to see if 360 // NMT picks it up correctly 361 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size)) 362 jlong addr = 0; 363 addr = (jlong)(uintptr_t)os::malloc(size, mtTest); 364 return addr; 365 WB_END 366 367 // Alloc memory with pseudo call stack. The test can create psudo malloc 368 // allocation site to stress the malloc tracking. 369 WB_ENTRY(jlong, WB_NMTMallocWithPseudoStack(JNIEnv* env, jobject o, jlong size, jint pseudo_stack)) 370 address pc = (address)(size_t)pseudo_stack; 371 NativeCallStack stack(&pc, 1); 372 return (jlong)(uintptr_t)os::malloc(size, mtTest, stack); 373 WB_END 374 375 // Free the memory allocated by NMTAllocTest 376 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem)) 377 os::free((void*)(uintptr_t)mem, mtTest); 378 WB_END 379 380 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size)) 381 jlong addr = 0; 382 383 addr = (jlong)(uintptr_t)os::reserve_memory(size); 384 MemTracker::record_virtual_memory_type((address)addr, mtTest); 385 386 return addr; 387 WB_END 388 389 390 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 391 os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem); 392 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest); 393 WB_END 394 395 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 396 os::uncommit_memory((char *)(uintptr_t)addr, size); 397 WB_END 398 399 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 400 os::release_memory((char *)(uintptr_t)addr, size); 401 WB_END 402 403 WB_ENTRY(jboolean, WB_NMTIsDetailSupported(JNIEnv* env)) 404 return MemTracker::tracking_level() == NMT_detail; 405 WB_END 406 407 WB_ENTRY(jboolean, WB_NMTChangeTrackingLevel(JNIEnv* env)) 408 // Test that we can downgrade NMT levels but not upgrade them. 409 if (MemTracker::tracking_level() == NMT_off) { 410 MemTracker::transition_to(NMT_off); 411 return MemTracker::tracking_level() == NMT_off; 412 } else { 413 assert(MemTracker::tracking_level() == NMT_detail, "Should start out as detail tracking"); 414 MemTracker::transition_to(NMT_summary); 415 assert(MemTracker::tracking_level() == NMT_summary, "Should be summary now"); 416 417 // Can't go to detail once NMT is set to summary. 418 MemTracker::transition_to(NMT_detail); 419 assert(MemTracker::tracking_level() == NMT_summary, "Should still be summary now"); 420 421 // Shutdown sets tracking level to minimal. 422 MemTracker::shutdown(); 423 assert(MemTracker::tracking_level() == NMT_minimal, "Should be minimal now"); 424 425 // Once the tracking level is minimal, we cannot increase to summary. 426 // The code ignores this request instead of asserting because if the malloc site 427 // table overflows in another thread, it tries to change the code to summary. 428 MemTracker::transition_to(NMT_summary); 429 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now"); 430 431 // Really can never go up to detail, verify that the code would never do this. 432 MemTracker::transition_to(NMT_detail); 433 assert(MemTracker::tracking_level() == NMT_minimal, "Should still be minimal now"); 434 return MemTracker::tracking_level() == NMT_minimal; 435 } 436 WB_END 437 438 WB_ENTRY(jint, WB_NMTGetHashSize(JNIEnv* env, jobject o)) 439 int hash_size = MallocSiteTable::hash_buckets(); 440 assert(hash_size > 0, "NMT hash_size should be > 0"); 441 return (jint)hash_size; 442 WB_END 443 #endif // INCLUDE_NMT 444 445 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) { 446 assert(method != NULL, "method should not be null"); 447 ThreadToNativeFromVM ttn(thread); 448 return env->FromReflectedMethod(method); 449 } 450 451 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o)) 452 MutexLockerEx mu(Compile_lock); 453 CodeCache::mark_all_nmethods_for_deoptimization(); 454 VM_Deoptimize op; 455 VMThread::execute(&op); 456 WB_END 457 458 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 459 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 460 int result = 0; 461 CHECK_JNI_EXCEPTION_(env, result); 462 MutexLockerEx mu(Compile_lock); 463 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 464 if (is_osr) { 465 result += mh->mark_osr_nmethods(); 466 } else if (mh->code() != NULL) { 467 mh->code()->mark_for_deoptimization(); 468 ++result; 469 } 470 result += CodeCache::mark_for_deoptimization(mh()); 471 if (result > 0) { 472 VM_Deoptimize op; 473 VMThread::execute(&op); 474 } 475 return result; 476 WB_END 477 478 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 479 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 480 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 481 MutexLockerEx mu(Compile_lock); 482 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 483 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 484 if (code == NULL) { 485 return JNI_FALSE; 486 } 487 return (code->is_alive() && !code->is_marked_for_deoptimization()); 488 WB_END 489 490 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 491 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 492 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 493 MutexLockerEx mu(Compile_lock); 494 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 495 if (is_osr) { 496 return CompilationPolicy::can_be_osr_compiled(mh, comp_level); 497 } else { 498 return CompilationPolicy::can_be_compiled(mh, comp_level); 499 } 500 WB_END 501 502 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method)) 503 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 504 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 505 MutexLockerEx mu(Compile_lock); 506 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 507 return mh->queued_for_compilation(); 508 WB_END 509 510 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 511 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 512 CHECK_JNI_EXCEPTION_(env, CompLevel_none); 513 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 514 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 515 return (code != NULL ? code->comp_level() : CompLevel_none); 516 WB_END 517 518 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level, jboolean is_osr)) 519 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 520 CHECK_JNI_EXCEPTION(env); 521 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 522 if (is_osr) { 523 mh->set_not_osr_compilable(comp_level, true /* report */, "WhiteBox"); 524 } else { 525 mh->set_not_compilable(comp_level, true /* report */, "WhiteBox"); 526 } 527 WB_END 528 529 WB_ENTRY(jint, WB_GetMethodEntryBci(JNIEnv* env, jobject o, jobject method)) 530 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 531 CHECK_JNI_EXCEPTION_(env, InvocationEntryBci); 532 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 533 nmethod* code = mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false); 534 return (code != NULL && code->is_osr_method() ? code->osr_entry_bci() : InvocationEntryBci); 535 WB_END 536 537 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 538 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 539 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 540 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 541 bool result = mh->dont_inline(); 542 mh->set_dont_inline(value == JNI_TRUE); 543 return result; 544 WB_END 545 546 WB_ENTRY(jint, WB_GetCompileQueueSize(JNIEnv* env, jobject o, jint comp_level)) 547 if (comp_level == CompLevel_any) { 548 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ + 549 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */; 550 } else { 551 return CompileBroker::queue_size(comp_level); 552 } 553 WB_END 554 555 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 556 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 557 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 558 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 559 bool result = mh->force_inline(); 560 mh->set_force_inline(value == JNI_TRUE); 561 return result; 562 WB_END 563 564 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level, jint bci)) 565 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 566 CHECK_JNI_EXCEPTION_(env, JNI_FALSE); 567 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 568 nmethod* nm = CompileBroker::compile_method(mh, bci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD); 569 MutexLockerEx mu(Compile_lock); 570 return (mh->queued_for_compilation() || nm != NULL); 571 WB_END 572 573 class VM_WhiteBoxOperation : public VM_Operation { 574 public: 575 VM_WhiteBoxOperation() { } 576 VMOp_Type type() const { return VMOp_WhiteBoxOperation; } 577 bool allow_nested_vm_operations() const { return true; } 578 }; 579 580 class AlwaysFalseClosure : public BoolObjectClosure { 581 public: 582 bool do_object_b(oop p) { return false; } 583 }; 584 585 static AlwaysFalseClosure always_false; 586 587 class VM_WhiteBoxCleanMethodData : public VM_WhiteBoxOperation { 588 public: 589 VM_WhiteBoxCleanMethodData(MethodData* mdo) : _mdo(mdo) { } 590 void doit() { 591 _mdo->clean_method_data(&always_false); 592 } 593 private: 594 MethodData* _mdo; 595 }; 596 597 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method)) 598 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 599 CHECK_JNI_EXCEPTION(env); 600 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 601 MutexLockerEx mu(Compile_lock); 602 MethodData* mdo = mh->method_data(); 603 MethodCounters* mcs = mh->method_counters(); 604 605 if (mdo != NULL) { 606 mdo->init(); 607 ResourceMark rm; 608 int arg_count = mdo->method()->size_of_parameters(); 609 for (int i = 0; i < arg_count; i++) { 610 mdo->set_arg_modified(i, 0); 611 } 612 VM_WhiteBoxCleanMethodData op(mdo); 613 VMThread::execute(&op); 614 } 615 616 mh->clear_not_c1_compilable(); 617 mh->clear_not_c2_compilable(); 618 mh->clear_not_c2_osr_compilable(); 619 NOT_PRODUCT(mh->set_compiled_invocation_count(0)); 620 if (mcs != NULL) { 621 mcs->backedge_counter()->init(); 622 mcs->invocation_counter()->init(); 623 mcs->set_interpreter_invocation_count(0); 624 mcs->set_interpreter_throwout_count(0); 625 626 #ifdef TIERED 627 mcs->set_rate(0.0F); 628 mh->set_prev_event_count(0); 629 mh->set_prev_time(0); 630 #endif 631 } 632 WB_END 633 634 template <typename T> 635 static bool GetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAt)(const char*, T*, bool, bool)) { 636 if (name == NULL) { 637 return false; 638 } 639 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 640 const char* flag_name = env->GetStringUTFChars(name, NULL); 641 bool result = (*TAt)(flag_name, value, true, true); 642 env->ReleaseStringUTFChars(name, flag_name); 643 return result; 644 } 645 646 template <typename T> 647 static bool SetVMFlag(JavaThread* thread, JNIEnv* env, jstring name, T* value, bool (*TAtPut)(const char*, T*, Flag::Flags)) { 648 if (name == NULL) { 649 return false; 650 } 651 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 652 const char* flag_name = env->GetStringUTFChars(name, NULL); 653 bool result = (*TAtPut)(flag_name, value, Flag::INTERNAL); 654 env->ReleaseStringUTFChars(name, flag_name); 655 return result; 656 } 657 658 template <typename T> 659 static jobject box(JavaThread* thread, JNIEnv* env, Symbol* name, Symbol* sig, T value) { 660 ResourceMark rm(thread); 661 jclass clazz = env->FindClass(name->as_C_string()); 662 CHECK_JNI_EXCEPTION_(env, NULL); 663 jmethodID methodID = env->GetStaticMethodID(clazz, 664 vmSymbols::valueOf_name()->as_C_string(), 665 sig->as_C_string()); 666 CHECK_JNI_EXCEPTION_(env, NULL); 667 jobject result = env->CallStaticObjectMethod(clazz, methodID, value); 668 CHECK_JNI_EXCEPTION_(env, NULL); 669 return result; 670 } 671 672 static jobject booleanBox(JavaThread* thread, JNIEnv* env, jboolean value) { 673 return box(thread, env, vmSymbols::java_lang_Boolean(), vmSymbols::Boolean_valueOf_signature(), value); 674 } 675 static jobject integerBox(JavaThread* thread, JNIEnv* env, jint value) { 676 return box(thread, env, vmSymbols::java_lang_Integer(), vmSymbols::Integer_valueOf_signature(), value); 677 } 678 static jobject longBox(JavaThread* thread, JNIEnv* env, jlong value) { 679 return box(thread, env, vmSymbols::java_lang_Long(), vmSymbols::Long_valueOf_signature(), value); 680 } 681 /* static jobject floatBox(JavaThread* thread, JNIEnv* env, jfloat value) { 682 return box(thread, env, vmSymbols::java_lang_Float(), vmSymbols::Float_valueOf_signature(), value); 683 }*/ 684 static jobject doubleBox(JavaThread* thread, JNIEnv* env, jdouble value) { 685 return box(thread, env, vmSymbols::java_lang_Double(), vmSymbols::Double_valueOf_signature(), value); 686 } 687 688 WB_ENTRY(jobject, WB_GetBooleanVMFlag(JNIEnv* env, jobject o, jstring name)) 689 bool result; 690 if (GetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAt)) { 691 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 692 return booleanBox(thread, env, result); 693 } 694 return NULL; 695 WB_END 696 697 WB_ENTRY(jobject, WB_GetIntxVMFlag(JNIEnv* env, jobject o, jstring name)) 698 intx result; 699 if (GetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAt)) { 700 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 701 return longBox(thread, env, result); 702 } 703 return NULL; 704 WB_END 705 706 WB_ENTRY(jobject, WB_GetUintxVMFlag(JNIEnv* env, jobject o, jstring name)) 707 uintx result; 708 if (GetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAt)) { 709 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 710 return longBox(thread, env, result); 711 } 712 return NULL; 713 WB_END 714 715 WB_ENTRY(jobject, WB_GetUint64VMFlag(JNIEnv* env, jobject o, jstring name)) 716 uint64_t result; 717 if (GetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAt)) { 718 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 719 return longBox(thread, env, result); 720 } 721 return NULL; 722 WB_END 723 724 WB_ENTRY(jobject, WB_GetDoubleVMFlag(JNIEnv* env, jobject o, jstring name)) 725 double result; 726 if (GetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAt)) { 727 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 728 return doubleBox(thread, env, result); 729 } 730 return NULL; 731 WB_END 732 733 WB_ENTRY(jstring, WB_GetStringVMFlag(JNIEnv* env, jobject o, jstring name)) 734 ccstr ccstrResult; 735 if (GetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAt)) { 736 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 737 jstring result = env->NewStringUTF(ccstrResult); 738 CHECK_JNI_EXCEPTION_(env, NULL); 739 return result; 740 } 741 return NULL; 742 WB_END 743 744 WB_ENTRY(void, WB_SetBooleanVMFlag(JNIEnv* env, jobject o, jstring name, jboolean value)) 745 bool result = value == JNI_TRUE ? true : false; 746 SetVMFlag <bool> (thread, env, name, &result, &CommandLineFlags::boolAtPut); 747 WB_END 748 749 WB_ENTRY(void, WB_SetIntxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 750 intx result = value; 751 SetVMFlag <intx> (thread, env, name, &result, &CommandLineFlags::intxAtPut); 752 WB_END 753 754 WB_ENTRY(void, WB_SetUintxVMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 755 uintx result = value; 756 SetVMFlag <uintx> (thread, env, name, &result, &CommandLineFlags::uintxAtPut); 757 WB_END 758 759 WB_ENTRY(void, WB_SetUint64VMFlag(JNIEnv* env, jobject o, jstring name, jlong value)) 760 uint64_t result = value; 761 SetVMFlag <uint64_t> (thread, env, name, &result, &CommandLineFlags::uint64_tAtPut); 762 WB_END 763 764 WB_ENTRY(void, WB_SetDoubleVMFlag(JNIEnv* env, jobject o, jstring name, jdouble value)) 765 double result = value; 766 SetVMFlag <double> (thread, env, name, &result, &CommandLineFlags::doubleAtPut); 767 WB_END 768 769 WB_ENTRY(void, WB_SetStringVMFlag(JNIEnv* env, jobject o, jstring name, jstring value)) 770 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 771 const char* ccstrValue = (value == NULL) ? NULL : env->GetStringUTFChars(value, NULL); 772 ccstr ccstrResult = ccstrValue; 773 bool needFree; 774 { 775 ThreadInVMfromNative ttvfn(thread); // back to VM 776 needFree = SetVMFlag <ccstr> (thread, env, name, &ccstrResult, &CommandLineFlags::ccstrAtPut); 777 } 778 if (value != NULL) { 779 env->ReleaseStringUTFChars(value, ccstrValue); 780 } 781 if (needFree) { 782 FREE_C_HEAP_ARRAY(char, ccstrResult, mtInternal); 783 } 784 WB_END 785 786 787 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString)) 788 ResourceMark rm(THREAD); 789 int len; 790 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false); 791 return (StringTable::lookup(name, len) != NULL); 792 WB_END 793 794 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o)) 795 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true); 796 Universe::heap()->collect(GCCause::_last_ditch_collection); 797 #if INCLUDE_ALL_GCS 798 if (UseG1GC) { 799 // Needs to be cleared explicitly for G1 800 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(false); 801 } 802 #endif // INCLUDE_ALL_GCS 803 WB_END 804 805 WB_ENTRY(void, WB_YoungGC(JNIEnv* env, jobject o)) 806 Universe::heap()->collect(GCCause::_wb_young_gc); 807 WB_END 808 809 WB_ENTRY(void, WB_ReadReservedMemory(JNIEnv* env, jobject o)) 810 // static+volatile in order to force the read to happen 811 // (not be eliminated by the compiler) 812 static char c; 813 static volatile char* p; 814 815 p = os::reserve_memory(os::vm_allocation_granularity(), NULL, 0); 816 if (p == NULL) { 817 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), "Failed to reserve memory"); 818 } 819 820 c = *p; 821 WB_END 822 823 WB_ENTRY(jstring, WB_GetCPUFeatures(JNIEnv* env, jobject o)) 824 const char* cpu_features = VM_Version::cpu_features(); 825 ThreadToNativeFromVM ttn(thread); 826 jstring features_string = env->NewStringUTF(cpu_features); 827 828 CHECK_JNI_EXCEPTION_(env, NULL); 829 830 return features_string; 831 WB_END 832 833 int WhiteBox::get_blob_type(const CodeBlob* code) { 834 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled"); 835 return CodeBlobType::All;; 836 } 837 838 struct CodeBlobStub { 839 CodeBlobStub(const CodeBlob* blob) : 840 name(os::strdup(blob->name())), 841 size(blob->size()), 842 blob_type(WhiteBox::get_blob_type(blob)), 843 address((jlong) blob) { } 844 ~CodeBlobStub() { os::free((void*) name); } 845 const char* const name; 846 const jint size; 847 const jint blob_type; 848 const jlong address; 849 }; 850 851 static jobjectArray codeBlob2objectArray(JavaThread* thread, JNIEnv* env, CodeBlobStub* cb) { 852 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 853 CHECK_JNI_EXCEPTION_(env, NULL); 854 jobjectArray result = env->NewObjectArray(4, clazz, NULL); 855 856 jstring name = env->NewStringUTF(cb->name); 857 CHECK_JNI_EXCEPTION_(env, NULL); 858 env->SetObjectArrayElement(result, 0, name); 859 860 jobject obj = integerBox(thread, env, cb->size); 861 CHECK_JNI_EXCEPTION_(env, NULL); 862 env->SetObjectArrayElement(result, 1, obj); 863 864 obj = integerBox(thread, env, cb->blob_type); 865 CHECK_JNI_EXCEPTION_(env, NULL); 866 env->SetObjectArrayElement(result, 2, obj); 867 868 obj = longBox(thread, env, cb->address); 869 CHECK_JNI_EXCEPTION_(env, NULL); 870 env->SetObjectArrayElement(result, 3, obj); 871 872 return result; 873 } 874 875 WB_ENTRY(jobjectArray, WB_GetNMethod(JNIEnv* env, jobject o, jobject method, jboolean is_osr)) 876 ResourceMark rm(THREAD); 877 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 878 CHECK_JNI_EXCEPTION_(env, NULL); 879 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 880 nmethod* code = is_osr ? mh->lookup_osr_nmethod_for(InvocationEntryBci, CompLevel_none, false) : mh->code(); 881 jobjectArray result = NULL; 882 if (code == NULL) { 883 return result; 884 } 885 int insts_size = code->insts_size(); 886 887 ThreadToNativeFromVM ttn(thread); 888 jclass clazz = env->FindClass(vmSymbols::java_lang_Object()->as_C_string()); 889 CHECK_JNI_EXCEPTION_(env, NULL); 890 result = env->NewObjectArray(2, clazz, NULL); 891 if (result == NULL) { 892 return result; 893 } 894 895 jobject obj = integerBox(thread, env, code->comp_level()); 896 CHECK_JNI_EXCEPTION_(env, NULL); 897 env->SetObjectArrayElement(result, 0, obj); 898 899 jbyteArray insts = env->NewByteArray(insts_size); 900 CHECK_JNI_EXCEPTION_(env, NULL); 901 env->SetByteArrayRegion(insts, 0, insts_size, (jbyte*) code->insts_begin()); 902 env->SetObjectArrayElement(result, 1, insts); 903 904 return result; 905 WB_END 906 907 CodeBlob* WhiteBox::allocate_code_blob(int size, int blob_type) { 908 guarantee(WhiteBoxAPI, "internal testing API :: WhiteBox has to be enabled"); 909 BufferBlob* blob; 910 int full_size = CodeBlob::align_code_offset(sizeof(BufferBlob)); 911 if (full_size < size) { 912 full_size += align_up(size - full_size, oopSize); 913 } 914 { 915 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 916 blob = (BufferBlob*) CodeCache::allocate(full_size); 917 ::new (blob) BufferBlob("WB::DummyBlob", full_size); 918 } 919 // Track memory usage statistic after releasing CodeCache_lock 920 MemoryService::track_code_cache_memory_usage(); 921 return blob; 922 } 923 924 WB_ENTRY(jlong, WB_AllocateCodeBlob(JNIEnv* env, jobject o, jint size, jint blob_type)) 925 if (size < 0) { 926 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 927 err_msg("WB_AllocateCodeBlob: size is negative: " INT32_FORMAT, size)); 928 } 929 return (jlong) WhiteBox::allocate_code_blob(size, blob_type); 930 WB_END 931 932 WB_ENTRY(void, WB_FreeCodeBlob(JNIEnv* env, jobject o, jlong addr)) 933 if (addr == 0) { 934 return; 935 } 936 BufferBlob::free((BufferBlob*) addr); 937 WB_END 938 939 WB_ENTRY(jobjectArray, WB_GetCodeBlob(JNIEnv* env, jobject o, jlong addr)) 940 if (addr == 0) { 941 THROW_MSG_NULL(vmSymbols::java_lang_NullPointerException(), 942 "WB_GetCodeBlob: addr is null"); 943 } 944 ThreadToNativeFromVM ttn(thread); 945 CodeBlobStub stub((CodeBlob*) addr); 946 return codeBlob2objectArray(thread, env, &stub); 947 WB_END 948 949 int WhiteBox::array_bytes_to_length(size_t bytes) { 950 return Array<u1>::bytes_to_length(bytes); 951 } 952 953 WB_ENTRY(jlong, WB_AllocateMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong size)) 954 if (size < 0) { 955 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 956 err_msg("WB_AllocateMetaspace: size is negative: " JLONG_FORMAT, size)); 957 } 958 959 oop class_loader_oop = JNIHandles::resolve(class_loader); 960 ClassLoaderData* cld = class_loader_oop != NULL 961 ? java_lang_ClassLoader::loader_data(class_loader_oop) 962 : ClassLoaderData::the_null_class_loader_data(); 963 964 void* metadata = MetadataFactory::new_writeable_array<u1>(cld, WhiteBox::array_bytes_to_length((size_t)size), thread); 965 966 return (jlong)(uintptr_t)metadata; 967 WB_END 968 969 WB_ENTRY(void, WB_FreeMetaspace(JNIEnv* env, jobject wb, jobject class_loader, jlong addr, jlong size)) 970 oop class_loader_oop = JNIHandles::resolve(class_loader); 971 ClassLoaderData* cld = class_loader_oop != NULL 972 ? java_lang_ClassLoader::loader_data(class_loader_oop) 973 : ClassLoaderData::the_null_class_loader_data(); 974 975 MetadataFactory::free_array(cld, (Array<u1>*)(uintptr_t)addr); 976 WB_END 977 978 WB_ENTRY(jlong, WB_IncMetaspaceCapacityUntilGC(JNIEnv* env, jobject wb, jlong inc)) 979 if (inc < 0) { 980 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 981 err_msg("WB_IncMetaspaceCapacityUntilGC: inc is negative: " JLONG_FORMAT, inc)); 982 } 983 984 jlong max_size_t = (jlong) ((size_t) -1); 985 if (inc > max_size_t) { 986 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 987 err_msg("WB_IncMetaspaceCapacityUntilGC: inc does not fit in size_t: " JLONG_FORMAT, inc)); 988 } 989 990 size_t new_cap_until_GC = 0; 991 size_t aligned_inc = align_size_down((size_t) inc, Metaspace::commit_alignment()); 992 bool success = MetaspaceGC::inc_capacity_until_GC(aligned_inc, &new_cap_until_GC); 993 if (!success) { 994 THROW_MSG_0(vmSymbols::java_lang_IllegalStateException(), 995 "WB_IncMetaspaceCapacityUntilGC: could not increase capacity until GC " 996 "due to contention with another thread"); 997 } 998 return (jlong) new_cap_until_GC; 999 WB_END 1000 1001 WB_ENTRY(jlong, WB_MetaspaceCapacityUntilGC(JNIEnv* env, jobject wb)) 1002 return (jlong) MetaspaceGC::capacity_until_GC(); 1003 WB_END 1004 1005 WB_ENTRY(jboolean, WB_IsSharedClass(JNIEnv* env, jobject wb, jclass clazz)) 1006 return (jboolean)MetaspaceShared::is_in_shared_space(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); 1007 WB_END 1008 1009 WB_ENTRY(jboolean, WB_IsMonitorInflated(JNIEnv* env, jobject wb, jobject obj)) 1010 oop obj_oop = JNIHandles::resolve(obj); 1011 return (jboolean) obj_oop->mark()->has_monitor(); 1012 WB_END 1013 1014 WB_ENTRY(void, WB_ForceSafepoint(JNIEnv* env, jobject wb)) 1015 VM_ForceSafepoint force_safepoint_op; 1016 VMThread::execute(&force_safepoint_op); 1017 WB_END 1018 1019 //Some convenience methods to deal with objects from java 1020 int WhiteBox::offset_for_field(const char* field_name, oop object, 1021 Symbol* signature_symbol) { 1022 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); 1023 Thread* THREAD = Thread::current(); 1024 1025 //Get the class of our object 1026 Klass* arg_klass = object->klass(); 1027 //Turn it into an instance-klass 1028 InstanceKlass* ik = InstanceKlass::cast(arg_klass); 1029 1030 //Create symbols to look for in the class 1031 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), 1032 THREAD); 1033 1034 //To be filled in with an offset of the field we're looking for 1035 fieldDescriptor fd; 1036 1037 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); 1038 if (res == NULL) { 1039 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), 1040 name_symbol->as_C_string()); 1041 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 1042 } 1043 1044 //fetch the field at the offset we've found 1045 int dest_offset = fd.offset(); 1046 1047 return dest_offset; 1048 } 1049 1050 1051 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { 1052 int offset = offset_for_field(field_name, object, 1053 vmSymbols::string_signature()); 1054 oop string = object->obj_field(offset); 1055 if (string == NULL) { 1056 return NULL; 1057 } 1058 const char* ret = java_lang_String::as_utf8_string(string); 1059 return ret; 1060 } 1061 1062 bool WhiteBox::lookup_bool(const char* field_name, oop object) { 1063 int offset = 1064 offset_for_field(field_name, object, vmSymbols::bool_signature()); 1065 bool ret = (object->bool_field(offset) == JNI_TRUE); 1066 return ret; 1067 } 1068 1069 void WhiteBox::register_methods(JNIEnv* env, jclass wbclass, JavaThread* thread, JNINativeMethod* method_array, int method_count) { 1070 ResourceMark rm; 1071 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 1072 1073 // one by one registration natives for exception catching 1074 jclass no_such_method_error_klass = env->FindClass(vmSymbols::java_lang_NoSuchMethodError()->as_C_string()); 1075 CHECK_JNI_EXCEPTION(env); 1076 for (int i = 0, n = method_count; i < n; ++i) { 1077 // Skip dummy entries 1078 if (method_array[i].fnPtr == NULL) continue; 1079 if (env->RegisterNatives(wbclass, &method_array[i], 1) != 0) { 1080 jthrowable throwable_obj = env->ExceptionOccurred(); 1081 if (throwable_obj != NULL) { 1082 env->ExceptionClear(); 1083 if (env->IsInstanceOf(throwable_obj, no_such_method_error_klass)) { 1084 // NoSuchMethodError is thrown when a method can't be found or a method is not native. 1085 // Ignoring the exception since it is not preventing use of other WhiteBox methods. 1086 tty->print_cr("Warning: 'NoSuchMethodError' on register of sun.hotspot.WhiteBox::%s%s", 1087 method_array[i].name, method_array[i].signature); 1088 } 1089 } else { 1090 // Registration failed unexpectedly. 1091 tty->print_cr("Warning: unexpected error on register of sun.hotspot.WhiteBox::%s%s. All methods will be unregistered", 1092 method_array[i].name, method_array[i].signature); 1093 env->UnregisterNatives(wbclass); 1094 break; 1095 } 1096 } 1097 } 1098 } 1099 1100 // Checks that the library libfile has the noexecstack bit set. 1101 WB_ENTRY(jboolean, WB_CheckLibSpecifiesNoexecstack(JNIEnv* env, jobject o, jstring libfile)) 1102 jboolean ret = false; 1103 #ifdef LINUX 1104 // Can't be in VM when we call JNI. 1105 ThreadToNativeFromVM ttnfv(thread); 1106 const char* lf = env->GetStringUTFChars(libfile, NULL); 1107 CHECK_JNI_EXCEPTION_(env, 0); 1108 ElfFile ef(lf); 1109 ret = (jboolean) ef.specifies_noexecstack(); 1110 env->ReleaseStringUTFChars(libfile, lf); 1111 #endif 1112 return ret; 1113 WB_END 1114 1115 WB_ENTRY(jboolean, WB_IsContainerized(JNIEnv* env, jobject o)) 1116 LINUX_ONLY(return OSContainer::is_containerized();) 1117 return false; 1118 WB_END 1119 1120 WB_ENTRY(void, WB_PrintOsInfo(JNIEnv* env, jobject o)) 1121 os::print_os_info(tty); 1122 WB_END 1123 1124 #define CC (char*) 1125 1126 static JNINativeMethod methods[] = { 1127 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, 1128 {CC"getObjectSize", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize }, 1129 {CC"isObjectInOldGen", CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen }, 1130 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, 1131 {CC"getVMPageSize", CC"()I", (void*)&WB_GetVMPageSize }, 1132 {CC"getVMLargePageSize", CC"()J", (void*)&WB_GetVMLargePageSize}, 1133 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, 1134 {CC"classKnownToNotExist", 1135 CC"(Ljava/lang/ClassLoader;Ljava/lang/String;)Z",(void*)&WB_ClassKnownToNotExist}, 1136 {CC"getLookupCacheURLs", CC"(Ljava/lang/ClassLoader;)[Ljava/net/URL;", (void*)&WB_GetLookupCacheURLs}, 1137 {CC"getLookupCacheMatches", CC"(Ljava/lang/ClassLoader;Ljava/lang/String;)[I", 1138 (void*)&WB_GetLookupCacheMatches}, 1139 {CC"parseCommandLine", 1140 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", 1141 (void*) &WB_ParseCommandLine 1142 }, 1143 {CC"addToBootstrapClassLoaderSearch", CC"(Ljava/lang/String;)V", 1144 (void*)&WB_AddToBootstrapClassLoaderSearch}, 1145 {CC"addToSystemClassLoaderSearch", CC"(Ljava/lang/String;)V", 1146 (void*)&WB_AddToSystemClassLoaderSearch}, 1147 {CC"getCompressedOopsMaxHeapSize", CC"()J", 1148 (void*)&WB_GetCompressedOopsMaxHeapSize}, 1149 {CC"printHeapSizes", CC"()V", (void*)&WB_PrintHeapSizes }, 1150 {CC"runMemoryUnitTests", CC"()V", (void*)&WB_RunMemoryUnitTests}, 1151 {CC"readFromNoaccessArea",CC"()V", (void*)&WB_ReadFromNoaccessArea}, 1152 {CC"stressVirtualSpaceResize",CC"(JJJ)I", (void*)&WB_StressVirtualSpaceResize}, 1153 {CC"isSharedClass", CC"(Ljava/lang/Class;)Z", (void*)&WB_IsSharedClass }, 1154 #if INCLUDE_ALL_GCS 1155 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, 1156 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, 1157 {CC"g1NumMaxRegions", CC"()J", (void*)&WB_G1NumMaxRegions }, 1158 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, 1159 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, 1160 {CC"g1StartConcMarkCycle", CC"()Z", (void*)&WB_G1StartMarkCycle }, 1161 {CC"g1AuxiliaryMemoryUsage", CC"()Ljava/lang/management/MemoryUsage;", 1162 (void*)&WB_G1AuxiliaryMemoryUsage }, 1163 #endif // INCLUDE_ALL_GCS 1164 #if INCLUDE_NMT 1165 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc }, 1166 {CC"NMTMallocWithPseudoStack", CC"(JI)J", (void*)&WB_NMTMallocWithPseudoStack}, 1167 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree }, 1168 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory }, 1169 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory }, 1170 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory }, 1171 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory }, 1172 {CC"NMTIsDetailSupported",CC"()Z", (void*)&WB_NMTIsDetailSupported}, 1173 {CC"NMTChangeTrackingLevel", CC"()Z", (void*)&WB_NMTChangeTrackingLevel}, 1174 {CC"NMTGetHashSize", CC"()I", (void*)&WB_NMTGetHashSize }, 1175 #endif // INCLUDE_NMT 1176 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll }, 1177 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;Z)I", 1178 (void*)&WB_DeoptimizeMethod }, 1179 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;Z)Z", 1180 (void*)&WB_IsMethodCompiled }, 1181 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;IZ)Z", 1182 (void*)&WB_IsMethodCompilable}, 1183 {CC"isMethodQueuedForCompilation", 1184 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation}, 1185 {CC"makeMethodNotCompilable", 1186 CC"(Ljava/lang/reflect/Executable;IZ)V", (void*)&WB_MakeMethodNotCompilable}, 1187 {CC"testSetDontInlineMethod", 1188 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod}, 1189 {CC"getMethodCompilationLevel", 1190 CC"(Ljava/lang/reflect/Executable;Z)I", (void*)&WB_GetMethodCompilationLevel}, 1191 {CC"getMethodEntryBci", 1192 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodEntryBci}, 1193 {CC"getCompileQueueSize", 1194 CC"(I)I", (void*)&WB_GetCompileQueueSize}, 1195 {CC"testSetForceInlineMethod", 1196 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod}, 1197 {CC"enqueueMethodForCompilation", 1198 CC"(Ljava/lang/reflect/Executable;II)Z", (void*)&WB_EnqueueMethodForCompilation}, 1199 {CC"clearMethodState", 1200 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState}, 1201 {CC"setBooleanVMFlag", CC"(Ljava/lang/String;Z)V",(void*)&WB_SetBooleanVMFlag}, 1202 {CC"setIntxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetIntxVMFlag}, 1203 {CC"setUintxVMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUintxVMFlag}, 1204 {CC"setUint64VMFlag", CC"(Ljava/lang/String;J)V",(void*)&WB_SetUint64VMFlag}, 1205 {CC"setDoubleVMFlag", CC"(Ljava/lang/String;D)V",(void*)&WB_SetDoubleVMFlag}, 1206 {CC"setStringVMFlag", CC"(Ljava/lang/String;Ljava/lang/String;)V", 1207 (void*)&WB_SetStringVMFlag}, 1208 {CC"getBooleanVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Boolean;", 1209 (void*)&WB_GetBooleanVMFlag}, 1210 {CC"getIntxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1211 (void*)&WB_GetIntxVMFlag}, 1212 {CC"getUintxVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1213 (void*)&WB_GetUintxVMFlag}, 1214 {CC"getUint64VMFlag", CC"(Ljava/lang/String;)Ljava/lang/Long;", 1215 (void*)&WB_GetUint64VMFlag}, 1216 {CC"getDoubleVMFlag", CC"(Ljava/lang/String;)Ljava/lang/Double;", 1217 (void*)&WB_GetDoubleVMFlag}, 1218 {CC"getStringVMFlag", CC"(Ljava/lang/String;)Ljava/lang/String;", 1219 (void*)&WB_GetStringVMFlag}, 1220 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable }, 1221 {CC"fullGC", CC"()V", (void*)&WB_FullGC }, 1222 {CC"youngGC", CC"()V", (void*)&WB_YoungGC }, 1223 {CC"readReservedMemory", CC"()V", (void*)&WB_ReadReservedMemory }, 1224 {CC"allocateCodeBlob", CC"(II)J", (void*)&WB_AllocateCodeBlob }, 1225 {CC"freeCodeBlob", CC"(J)V", (void*)&WB_FreeCodeBlob }, 1226 {CC"getCodeBlob", CC"(J)[Ljava/lang/Object;",(void*)&WB_GetCodeBlob }, 1227 {CC"allocateMetaspace", 1228 CC"(Ljava/lang/ClassLoader;J)J", (void*)&WB_AllocateMetaspace }, 1229 {CC"freeMetaspace", 1230 CC"(Ljava/lang/ClassLoader;JJ)V", (void*)&WB_FreeMetaspace }, 1231 {CC"incMetaspaceCapacityUntilGC", CC"(J)J", (void*)&WB_IncMetaspaceCapacityUntilGC }, 1232 {CC"metaspaceCapacityUntilGC", CC"()J", (void*)&WB_MetaspaceCapacityUntilGC }, 1233 {CC"getCPUFeatures", CC"()Ljava/lang/String;", (void*)&WB_GetCPUFeatures }, 1234 {CC"getNMethod", CC"(Ljava/lang/reflect/Executable;Z)[Ljava/lang/Object;", 1235 (void*)&WB_GetNMethod }, 1236 {CC"isMonitorInflated", CC"(Ljava/lang/Object;)Z", (void*)&WB_IsMonitorInflated }, 1237 {CC"forceSafepoint", CC"()V", (void*)&WB_ForceSafepoint }, 1238 {CC"checkLibSpecifiesNoexecstack", CC"(Ljava/lang/String;)Z", 1239 (void*)&WB_CheckLibSpecifiesNoexecstack}, 1240 {CC"isContainerized", CC"()Z", (void*)&WB_IsContainerized }, 1241 {CC"printOsInfo", CC"()V", (void*)&WB_PrintOsInfo }, 1242 }; 1243 1244 #undef CC 1245 1246 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) 1247 { 1248 if (WhiteBoxAPI) { 1249 // Make sure that wbclass is loaded by the null classloader 1250 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); 1251 Handle loader(ikh->class_loader()); 1252 if (loader.is_null()) { 1253 WhiteBox::register_methods(env, wbclass, thread, methods, sizeof(methods) / sizeof(methods[0])); 1254 WhiteBox::register_extended(env, wbclass, thread); 1255 WhiteBox::set_used(); 1256 } 1257 } 1258 } 1259 JVM_END