whitebox.cpp revision 4554:f32b6c267d2e
1/* 2 * Copyright (c) 2012, 2013, 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 54bool WhiteBox::_used = false; 55 56WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj)) 57 return (jlong)(void*)JNIHandles::resolve(obj); 58WB_END 59 60WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o)) 61 return heapOopSize; 62WB_END 63 64 65class WBIsKlassAliveClosure : public KlassClosure { 66 Symbol* _name; 67 bool _found; 68public: 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 84WB_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(); 94WB_END 95 96#if INCLUDE_ALL_GCS 97WB_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(); 102WB_END 103 104WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o)) 105 G1CollectedHeap* g1 = G1CollectedHeap::heap(); 106 size_t nr = g1->free_regions(); 107 return (jlong)nr; 108WB_END 109 110WB_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(); 114WB_END 115 116WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o)) 117 return (jint)HeapRegion::GrainBytes; 118WB_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 124WB_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; 132WB_END 133 134// Free the memory allocated by NMTAllocTest 135WB_ENTRY(void, WB_NMTFree(JNIEnv* env, jobject o, jlong mem)) 136 os::free((void*)(uintptr_t)mem, mtTest); 137WB_END 138 139WB_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; 148WB_END 149 150 151WB_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); 154WB_END 155 156WB_ENTRY(void, WB_NMTUncommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 157 os::uncommit_memory((char *)(uintptr_t)addr, size); 158WB_END 159 160WB_ENTRY(void, WB_NMTReleaseMemory(JNIEnv* env, jobject o, jlong addr, jlong size)) 161 os::release_memory((char *)(uintptr_t)addr, size); 162WB_END 163 164// Block until the current generation of NMT data to be merged, used to reliably test the NMT feature 165WB_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(); 172WB_END 173 174#endif // INCLUDE_NMT 175 176static 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 182WB_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); 187WB_END 188 189WB_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; 205WB_END 206 207WB_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()); 216WB_END 217 218WB_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); 223WB_END 224 225WB_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(); 230WB_END 231 232WB_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); 237WB_END 238 239 240WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level)) 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(comp_level, true /* report */, "WhiteBox"); 244WB_END 245 246WB_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; 252WB_END 253 254WB_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 */; 257WB_END 258 259 260WB_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; 266WB_END 267 268WB_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); 274WB_END 275 276WB_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 MethodCounters* mcs = mh->method_counters(); 282 283 if (mdo != NULL) { 284 mdo->init(); 285 ResourceMark rm; 286 int arg_count = mdo->method()->size_of_parameters(); 287 for (int i = 0; i < arg_count; i++) { 288 mdo->set_arg_modified(i, 0); 289 } 290 } 291 292 mh->clear_not_c1_compilable(); 293 mh->clear_not_c2_compilable(); 294 mh->clear_not_c2_osr_compilable(); 295 NOT_PRODUCT(mh->set_compiled_invocation_count(0)); 296 if (mcs != NULL) { 297 mcs->backedge_counter()->init(); 298 mcs->invocation_counter()->init(); 299 mcs->set_interpreter_invocation_count(0); 300 mcs->set_interpreter_throwout_count(0); 301 302#ifdef TIERED 303 mcs->set_rate(0.0F); 304 mh->set_prev_event_count(0, THREAD); 305 mh->set_prev_time(0, THREAD); 306#endif 307 } 308WB_END 309 310WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString)) 311 ResourceMark rm(THREAD); 312 int len; 313 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len, CHECK_false); 314 return (StringTable::lookup(name, len) != NULL); 315WB_END 316 317 318WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o)) 319 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true); 320 Universe::heap()->collect(GCCause::_last_ditch_collection); 321WB_END 322 323 324WB_ENTRY(jlong, WB_ReserveMemory(JNIEnv* env, jobject o, jlong size)) 325 return (jlong)os::reserve_memory(size, NULL, 0); 326WB_END 327 328//Some convenience methods to deal with objects from java 329int WhiteBox::offset_for_field(const char* field_name, oop object, 330 Symbol* signature_symbol) { 331 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid"); 332 Thread* THREAD = Thread::current(); 333 334 //Get the class of our object 335 Klass* arg_klass = object->klass(); 336 //Turn it into an instance-klass 337 InstanceKlass* ik = InstanceKlass::cast(arg_klass); 338 339 //Create symbols to look for in the class 340 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name), 341 THREAD); 342 343 //To be filled in with an offset of the field we're looking for 344 fieldDescriptor fd; 345 346 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd); 347 if (res == NULL) { 348 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), 349 name_symbol->as_C_string()); 350 fatal("Invalid layout of preloaded class"); 351 } 352 353 //fetch the field at the offset we've found 354 int dest_offset = fd.offset(); 355 356 return dest_offset; 357} 358 359 360const char* WhiteBox::lookup_jstring(const char* field_name, oop object) { 361 int offset = offset_for_field(field_name, object, 362 vmSymbols::string_signature()); 363 oop string = object->obj_field(offset); 364 if (string == NULL) { 365 return NULL; 366 } 367 const char* ret = java_lang_String::as_utf8_string(string); 368 return ret; 369} 370 371bool WhiteBox::lookup_bool(const char* field_name, oop object) { 372 int offset = 373 offset_for_field(field_name, object, vmSymbols::bool_signature()); 374 bool ret = (object->bool_field(offset) == JNI_TRUE); 375 return ret; 376} 377 378 379#define CC (char*) 380 381static JNINativeMethod methods[] = { 382 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress }, 383 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize }, 384 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive }, 385 {CC"parseCommandLine", 386 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;", 387 (void*) &WB_ParseCommandLine 388 }, 389#if INCLUDE_ALL_GCS 390 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark}, 391 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous }, 392 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions }, 393 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize }, 394#endif // INCLUDE_ALL_GCS 395#ifdef INCLUDE_NMT 396 {CC"NMTMalloc", CC"(J)J", (void*)&WB_NMTMalloc }, 397 {CC"NMTFree", CC"(J)V", (void*)&WB_NMTFree }, 398 {CC"NMTReserveMemory", CC"(J)J", (void*)&WB_NMTReserveMemory }, 399 {CC"NMTCommitMemory", CC"(JJ)V", (void*)&WB_NMTCommitMemory }, 400 {CC"NMTUncommitMemory", CC"(JJ)V", (void*)&WB_NMTUncommitMemory }, 401 {CC"NMTReleaseMemory", CC"(JJ)V", (void*)&WB_NMTReleaseMemory }, 402 {CC"NMTWaitForDataMerge", CC"()Z", (void*)&WB_NMTWaitForDataMerge}, 403#endif // INCLUDE_NMT 404 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll }, 405 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Executable;)I", 406 (void*)&WB_DeoptimizeMethod }, 407 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Executable;)Z", 408 (void*)&WB_IsMethodCompiled }, 409 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Executable;I)Z", 410 (void*)&WB_IsMethodCompilable}, 411 {CC"isMethodQueuedForCompilation", 412 CC"(Ljava/lang/reflect/Executable;)Z", (void*)&WB_IsMethodQueuedForCompilation}, 413 {CC"makeMethodNotCompilable", 414 CC"(Ljava/lang/reflect/Executable;I)V", (void*)&WB_MakeMethodNotCompilable}, 415 {CC"testSetDontInlineMethod", 416 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetDontInlineMethod}, 417 {CC"getMethodCompilationLevel", 418 CC"(Ljava/lang/reflect/Executable;)I", (void*)&WB_GetMethodCompilationLevel}, 419 {CC"getCompileQueuesSize", 420 CC"()I", (void*)&WB_GetCompileQueuesSize}, 421 {CC"testSetForceInlineMethod", 422 CC"(Ljava/lang/reflect/Executable;Z)Z", (void*)&WB_TestSetForceInlineMethod}, 423 {CC"enqueueMethodForCompilation", 424 CC"(Ljava/lang/reflect/Executable;I)Z", (void*)&WB_EnqueueMethodForCompilation}, 425 {CC"clearMethodState", 426 CC"(Ljava/lang/reflect/Executable;)V", (void*)&WB_ClearMethodState}, 427 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable }, 428 {CC"fullGC", CC"()V", (void*)&WB_FullGC }, 429 430 {CC"reserveMemory", CC"(J)J", (void*)&WB_ReserveMemory }, 431}; 432 433#undef CC 434 435JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass)) 436 { 437 if (WhiteBoxAPI) { 438 // Make sure that wbclass is loaded by the null classloader 439 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass()); 440 Handle loader(ikh->class_loader()); 441 if (loader.is_null()) { 442 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI 443 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0])); 444 if (result == 0) { 445 WhiteBox::set_used(); 446 } 447 } 448 } 449 } 450JVM_END 451