1 /* 2 * Copyright (c) 2012, 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/universe.hpp" 28 #include "oops/oop.inline.hpp" 29 30 #include "classfile/symbolTable.hpp" 31 #include "classfile/classLoaderData.hpp" 32 33 #include "prims/whitebox.hpp" 34 #include "prims/wbtestmethods/parserTests.hpp" 35 36 #include "runtime/interfaceSupport.hpp" 37 #include "runtime/os.hpp" 38 #include "utilities/debug.hpp" 39 #include "utilities/macros.hpp" 40 41 #if INCLUDE_ALL_GCS 42 #include "gc_implementation/g1/concurrentMark.hpp" 43 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 44 #include "gc_implementation/g1/heapRegionRemSet.hpp" 45 #endif // INCLUDE_ALL_GCS 46 47 #ifdef INCLUDE_NMT 48 #include "services/memTracker.hpp" 49 #endif // INCLUDE_NMT 50 51 #include "compiler/compileBroker.hpp" 52 #include "runtime/compilationPolicy.hpp" 53 54 bool WhiteBox::_used = false; 55 56 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) 57 return (jlong)(void*)JNIHandles::resolve(obj); 58 WB_END 59 60 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) 61 return heapOopSize; 62 WB_END 63 64 65 class WBIsKlassAliveClosure : public KlassClosure { 66 Symbol* _name; 67 bool _found; 68 public: 69 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {} 70 71 void do_klass(Klass* k) { 72 if (_found) return; 73 Symbol* ksym = k->name(); 74 if (ksym->fast_compare(_name) == 0) { 75 _found = true; 76 } 77 } 78 79 bool found() const { 80 return _found; 81 } 82 }; 83 84 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name)) 85 Handle h_name = JNIHandles::resolve(name); 86 if (h_name.is_null()) return false; 87 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false); 88 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return 89 90 WBIsKlassAliveClosure closure(sym); 91 ClassLoaderDataGraph::classes_do(&closure); 92 93 return closure.found(); 94 WB_END 95 96 #if INCLUDE_ALL_GCS 97 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj)) 98 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 99 oop result = JNIHandles::resolve(obj); 100 const HeapRegion* hr = g1->heap_region_containing(result); 101 return hr->isHumongous(); 102 WB_END 103 104 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) 105 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 106 size_t nr = g1->free_regions(); 107 return (jlong)nr; 108 WB_END 109 110 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o)) 111 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 112 ConcurrentMark* cm = g1->concurrent_mark(); 113 return cm->concurrent_marking_in_progress(); 114 WB_END 115 116 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) 117 return (jint)HeapRegion::GrainBytes; 118 WB_END 119 #endif // INCLUDE_ALL_GCS 120 121 #ifdef INCLUDE_NMT 122 // Alloc memory using the test memory type so that we can use that to see if 123 // NMT picks it up correctly 124 WB_ENTRY(jlong, WB_NMTMalloc(JNIEnv* env, jobject o, jlong size)) 125 jlong addr = 0; 126 127 if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) { 128 addr = (jlong)(uintptr_t)os::malloc(size, mtTest); 129 } 130 131 return addr; 132 WB_END 133 134 // Free the memory allocated by NMTAllocTest 135 WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem)) 136 os::free((void*)(uintptr_t)mem, mtTest); 137 WB_END 138 139 WB_ENTRY(jlong, WB_NMTReserveMemory(JNIEnv* env, jobject o, jlong size)) 140 jlong addr = 0; 141 142 if (MemTracker::is_on() && !MemTracker::shutdown_in_progress()) { 143 addr = (jlong)(uintptr_t)os::reserve_memory(size); 144 MemTracker::record_virtual_memory_type((address)addr, mtTest); 145 } 146 147 return addr; 148 WB_END 149 150 151 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 152 os::commit_memory((char *)(uintptr_t)addr, size); 153 MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest); 154 WB_END 155 156 WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 157 os::uncommit_memory((char *)(uintptr_t)addr, size); 158 WB_END 159 160 WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 161 os::release_memory((char *)(uintptr_t)addr, size); 162 WB_END 163 164 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature 165 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env)) 166 167 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { 168 return false; 169 } 170 171 return MemTracker::wbtest_wait_for_data_merge(); 172 WB_END 173 174 #endif // INCLUDE_NMT 175 176 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) { 177 assert(method != NULL, "method should not be null"); 178 ThreadToNativeFromVM ttn(thread); 179 return env->FromReflectedMethod(method); 180 } 181 182 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o)) 183 MutexLockerEx mu(Compile_lock); 184 CodeCache::mark_all_nmethods_for_deoptimization(); 185 VM_Deoptimize op; 186 VMThread::execute(&op); 187 WB_END 188 189 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method)) 190 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 191 MutexLockerEx mu(Compile_lock); 192 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 193 int result = 0; 194 nmethod* code = mh->code(); 195 if (code != NULL) { 196 code->mark_for_deoptimization(); 197 ++result; 198 } 199 result += CodeCache::mark_for_deoptimization(mh()); 200 if (result > 0) { 201 VM_Deoptimize op; 202 VMThread::execute(&op); 203 } 204 return result; 205 WB_END 206 207 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method)) 208 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 209 MutexLockerEx mu(Compile_lock); 210 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 211 nmethod* code = mh->code(); 212 if (code == NULL) { 213 return JNI_FALSE; 214 } 215 return (code->is_alive() && !code->is_marked_for_deoptimization()); 216 WB_END 217 218 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level)) 219 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 220 MutexLockerEx mu(Compile_lock); 221 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 222 return CompilationPolicy::can_be_compiled(mh, comp_level); 223 WB_END 224 225 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method)) 226 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 227 MutexLockerEx mu(Compile_lock); 228 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 229 return mh->queued_for_compilation(); 230 WB_END 231 232 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method)) 233 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 234 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 235 nmethod* code = mh->code(); 236 return (code != NULL ? code->comp_level() : CompLevel_none); 237 WB_END 238 239 240 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method)) 241 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 242 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 243 mh->set_not_compilable(); 244 WB_END 245 246 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 247 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 248 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 249 bool result = mh->dont_inline(); 250 mh->set_dont_inline(value == JNI_TRUE); 251 return result; 252 WB_END 253 254 WB_ENTRY(jint, WB_GetCompileQueuesSize(JNIEnv* env, jobject o)) 255 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ + 256 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */; 257 WB_END 258 259 260 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value)) 261 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 262 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 263 bool result = mh->force_inline(); 264 mh->set_force_inline(value == JNI_TRUE); 265 return result; 266 WB_END 267 268 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level)) 269 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 270 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 271 nmethod* nm = CompileBroker::compile_method(mh, InvocationEntryBci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD); 272 MutexLockerEx mu(Compile_lock); 273 return (mh->queued_for_compilation() || nm != NULL); 274 WB_END 275 276 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method)) 277 jmethodID jmid = reflected_method_to_jmid(thread, env, method); 278 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid)); 279 MutexLockerEx mu(Compile_lock); 280 MethodData* mdo = mh->method_data(); 281 282 if (mdo != NULL) { 283 mdo->init(); 284 ResourceMark rm; 285 int arg_count = mdo->method()->size_of_parameters(); 286 for (int i = 0; i < arg_count; i++) { 287 mdo->set_arg_modified(i, 0); 288 } 289 } 290 291 mh->backedge_counter()->init(); 292 mh->invocation_counter()->init(); 293 mh->set_interpreter_invocation_count(0); 294 mh->set_interpreter_throwout_count(0); 295 mh->clear_not_c1_compilable(); 296 mh->clear_not_c2_compilable(); 297 mh->clear_not_c2_osr_compilable(); 298 NOT_PRODUCT(mh->set_compiled_invocation_count(0)); 299 300 #ifdef TIERED 301 mh->set_rate(0.0F); 302 mh->set_prev_event_count(0); 303 mh->set_prev_time(0); 304 #endif 305 WB_END 306 307 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString)) 308 ResourceMark rm(THREAD); 309 int len; 310 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len); 311 oop found_string = StringTable::the_table()->lookup(name, len); 312 if (found_string == NULL) { 313 return false; 314 } 315 return true; 316 WB_END 317 318 319 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o)) 320 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true); 321 Universe::heap()->collect(GCCause::_last_ditch_collection); 322 WB_END 323 324 //Some convenience methods to deal with objects from java 325 int WhiteBox::offset_for_field(const char* field_name, oop object, 326 Symbol* signature_symbol) { 327 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); 328 Thread* THREAD = Thread::current(); 329 330 //Get the class of our object 331 Klass* arg_klass = object->klass(); 332 //Turn it into an instance-klass 333 InstanceKlass* ik = InstanceKlass::cast(arg_klass); 334 335 //Create symbols to look for in the class 336 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), 337 THREAD); 338 339 //To be filled in with an offset of the field we're looking for 340 fieldDescriptor fd; 341 342 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); 343 if (res == NULL) { 344 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), 345 name_symbol->as_C_string()); 346 fatal("Invalid layout of preloaded class"); 347 } 348 349 //fetch the field at the offset we've found 350 int dest_offset = fd.offset(); 351 352 return dest_offset; 353 } 354 355 356 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { 357 int offset = offset_for_field(field_name, object, 358 vmSymbols::string_signature()); 359 oop string = object->obj_field(offset); 360 if (string == NULL) { 361 return NULL; 362 } 363 const char* ret = java_lang_String::as_utf8_string(string); 364 return ret; 365 } 366 367 bool WhiteBox::lookup_bool(const char* field_name, oop object) { 368 int offset = 369 offset_for_field(field_name, object, vmSymbols::bool_signature()); 370 bool ret = (object->bool_field(offset) == JNI_TRUE); 371 return ret; 372 } 373 374 375 #define CC (char*) 376 377 static JNINativeMethod methods[] = { 378 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, 379 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, 380 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, 381 {CC"parseCommandLine", 382 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", 383 (void*) &WB_ParseCommandLine 384 }, 385 #if INCLUDE_ALL_GCS 386 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, 387 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, 388 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, 389 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, 390 #endif // INCLUDE_ALL_GCS 391 #ifdef INCLUDE_NMT 392 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc }, 393 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree }, 394 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory }, 395 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory }, 396 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory }, 397 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory }, 398 {CC"NMTWaitForDataMerge", CC"()Z", (void*)&WB_NMTWaitForDataMerge}, 399 #endif // INCLUDE_NMT 400 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll }, 401 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Method;)I", 402 (void*)&WB_DeoptimizeMethod }, 403 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Method;)Z", 404 (void*)&WB_IsMethodCompiled }, 405 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Method;I)Z", 406 (void*)&WB_IsMethodCompilable}, 407 {CC"isMethodQueuedForCompilation", 408 CC"(Ljava/lang/reflect/Method;)Z", (void*)&WB_IsMethodQueuedForCompilation}, 409 {CC"makeMethodNotCompilable", 410 CC"(Ljava/lang/reflect/Method;)V", (void*)&WB_MakeMethodNotCompilable}, 411 {CC"testSetDontInlineMethod", 412 CC"(Ljava/lang/reflect/Method;Z)Z", (void*)&WB_TestSetDontInlineMethod}, 413 {CC"getMethodCompilationLevel", 414 CC"(Ljava/lang/reflect/Method;)I", (void*)&WB_GetMethodCompilationLevel}, 415 {CC"getCompileQueuesSize", 416 CC"()I", (void*)&WB_GetCompileQueuesSize}, 417 {CC"testSetForceInlineMethod", 418 CC"(Ljava/lang/reflect/Method;Z)Z", (void*)&WB_TestSetForceInlineMethod}, 419 {CC"enqueueMethodForCompilation", 420 CC"(Ljava/lang/reflect/Method;I)Z", (void*)&WB_EnqueueMethodForCompilation}, 421 {CC"clearMethodState", 422 CC"(Ljava/lang/reflect/Method;)V", (void*)&WB_ClearMethodState}, 423 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable }, 424 {CC"fullGC", CC"()V", (void*)&WB_FullGC }, 425 }; 426 427 #undef CC 428 429 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) 430 { 431 if (WhiteBoxAPI) { 432 // Make sure that wbclass is loaded by the null classloader 433 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); 434 Handle loader(ikh->class_loader()); 435 if (loader.is_null()) { 436 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 437 bool result = true; 438 // one by one registration natives for exception catching 439 for (int i = 0, n = sizeof(methods) / sizeof(methods[0]); i < n; ++i) { 440 if (env->RegisterNatives(wbclass, methods + i, 1) != 0) { 441 result &= false; 442 if (env->ExceptionCheck()) { 443 tty->print_cr("Warning: exception on register of sun.hotspot.WhiteBox::%s%s", methods[i].name, methods[i].signature); 444 env->ExceptionClear(); 445 result &= false; 446 } else { 447 // register is failed w/o exception 448 env->UnregisterNatives(wbclass); 449 result &= false; 450 break; 451 } 452 } 453 } 454 455 if (result) { 456 WhiteBox::set_used(); 457 } 458 } 459 } 460 } 461 JVM_END