mgerdin@3619: /*
mgerdin@3619:  * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
mgerdin@3619:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
mgerdin@3619:  *
mgerdin@3619:  * This code is free software; you can redistribute it and/or modify it
mgerdin@3619:  * under the terms of the GNU General Public License version 2 only, as
mgerdin@3619:  * published by the Free Software Foundation.
mgerdin@3619:  *
mgerdin@3619:  * This code is distributed in the hope that it will be useful, but WITHOUT
mgerdin@3619:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
mgerdin@3619:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
mgerdin@3619:  * version 2 for more details (a copy is included in the LICENSE file that
mgerdin@3619:  * accompanied this code).
mgerdin@3619:  *
mgerdin@3619:  * You should have received a copy of the GNU General Public License version
mgerdin@3619:  * 2 along with this work; if not, write to the Free Software Foundation,
mgerdin@3619:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
mgerdin@3619:  *
mgerdin@3619:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
mgerdin@3619:  * or visit www.oracle.com if you need additional information or have any
mgerdin@3619:  * questions.
mgerdin@3619:  *
mgerdin@3619:  */
mgerdin@3619: 
mgerdin@3619: #include "precompiled.hpp"
mgerdin@3619: 
mgerdin@3619: #include "memory/universe.hpp"
mgerdin@3619: #include "oops/oop.inline.hpp"
nloodin@3681: 
nloodin@3681: #include "classfile/symbolTable.hpp"
coleenp@4037: #include "classfile/classLoaderData.hpp"
nloodin@3681: 
mgerdin@3619: #include "prims/whitebox.hpp"
nloodin@3681: #include "prims/wbtestmethods/parserTests.hpp"
nloodin@3681: 
mgerdin@3619: #include "runtime/interfaceSupport.hpp"
mgerdin@3619: #include "runtime/os.hpp"
mgerdin@3619: #include "utilities/debug.hpp"
jprovino@4542: #include "utilities/macros.hpp"
mgerdin@3619: 
jprovino@4542: #if INCLUDE_ALL_GCS
mgerdin@3619: #include "gc_implementation/g1/concurrentMark.hpp"
mgerdin@3619: #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
mgerdin@3619: #include "gc_implementation/g1/heapRegionRemSet.hpp"
jprovino@4542: #endif // INCLUDE_ALL_GCS
mgerdin@3619: 
ctornqvi@4512: #ifdef INCLUDE_NMT
ctornqvi@4512: #include "services/memTracker.hpp"
ctornqvi@4512: #endif // INCLUDE_NMT
ctornqvi@4512: 
iignatyev@4592: #include "compiler/compileBroker.hpp"
iignatyev@4592: 
mgerdin@3619: bool WhiteBox::_used = false;
mgerdin@3619: 
mgerdin@3619: WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
mgerdin@3619:   return (jlong)(void*)JNIHandles::resolve(obj);
mgerdin@3619: WB_END
mgerdin@3619: 
mgerdin@3619: WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
mgerdin@3619:   return heapOopSize;
mgerdin@3619: WB_END
mgerdin@3619: 
coleenp@4037: 
coleenp@4037: class WBIsKlassAliveClosure : public KlassClosure {
coleenp@4037:     Symbol* _name;
coleenp@4037:     bool _found;
coleenp@4037: public:
coleenp@4037:     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
coleenp@4037: 
coleenp@4037:     void do_klass(Klass* k) {
coleenp@4037:       if (_found) return;
coleenp@4037:       Symbol* ksym = k->name();
coleenp@4037:       if (ksym->fast_compare(_name) == 0) {
coleenp@4037:         _found = true;
coleenp@4037:       }
coleenp@4037:     }
coleenp@4037: 
coleenp@4037:     bool found() const {
coleenp@4037:         return _found;
coleenp@4037:     }
coleenp@4037: };
coleenp@4037: 
coleenp@4037: WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
coleenp@4037:   Handle h_name = JNIHandles::resolve(name);
coleenp@4037:   if (h_name.is_null()) return false;
coleenp@4037:   Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
coleenp@4037:   TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
coleenp@4037: 
coleenp@4037:   WBIsKlassAliveClosure closure(sym);
coleenp@4037:   ClassLoaderDataGraph::classes_do(&closure);
coleenp@4037: 
coleenp@4037:   return closure.found();
coleenp@4037: WB_END
coleenp@4037: 
jprovino@4542: #if INCLUDE_ALL_GCS
mgerdin@3619: WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
mgerdin@3619:   G1CollectedHeap* g1 = G1CollectedHeap::heap();
mgerdin@3619:   oop result = JNIHandles::resolve(obj);
mgerdin@3619:   const HeapRegion* hr = g1->heap_region_containing(result);
mgerdin@3619:   return hr->isHumongous();
mgerdin@3619: WB_END
mgerdin@3619: 
mgerdin@3619: WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
mgerdin@3619:   G1CollectedHeap* g1 = G1CollectedHeap::heap();
mgerdin@3619:   size_t nr = g1->free_regions();
mgerdin@3619:   return (jlong)nr;
mgerdin@3619: WB_END
mgerdin@3619: 
mgerdin@3619: WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
mgerdin@3619:   G1CollectedHeap* g1 = G1CollectedHeap::heap();
mgerdin@3619:   ConcurrentMark* cm = g1->concurrent_mark();
mgerdin@3619:   return cm->concurrent_marking_in_progress();
mgerdin@3619: WB_END
mgerdin@3619: 
mgerdin@3619: WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
mgerdin@3619:   return (jint)HeapRegion::GrainBytes;
mgerdin@3619: WB_END
jprovino@4542: #endif // INCLUDE_ALL_GCS
mgerdin@3619: 
ctornqvi@4512: #ifdef INCLUDE_NMT
ctornqvi@4512: // Keep track of the 3 allocations in NMTAllocTest so we can free them later
ctornqvi@4512: // on and verify that they're not visible anymore
ctornqvi@4512: static void* nmtMtTest1 = NULL, *nmtMtTest2 = NULL, *nmtMtTest3 = NULL;
ctornqvi@4512: 
ctornqvi@4512: // Alloc memory using the test memory type so that we can use that to see if
ctornqvi@4512: // NMT picks it up correctly
ctornqvi@4512: WB_ENTRY(jboolean, WB_NMTAllocTest(JNIEnv* env))
ctornqvi@4512:   void *mem;
ctornqvi@4512: 
ctornqvi@4512:   if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
ctornqvi@4512:     return false;
ctornqvi@4512:   }
ctornqvi@4512: 
ctornqvi@4512:   // Allocate 2 * 128k + 256k + 1024k and free the 1024k one to make sure we track
ctornqvi@4512:   // everything correctly. Total should be 512k held alive.
ctornqvi@4512:   nmtMtTest1 = os::malloc(128 * 1024, mtTest);
ctornqvi@4512:   mem = os::malloc(1024 * 1024, mtTest);
ctornqvi@4512:   nmtMtTest2 = os::malloc(256 * 1024, mtTest);
ctornqvi@4512:   os::free(mem, mtTest);
ctornqvi@4512:   nmtMtTest3 = os::malloc(128 * 1024, mtTest);
ctornqvi@4512: 
ctornqvi@4512:   return true;
ctornqvi@4512: WB_END
ctornqvi@4512: 
ctornqvi@4512: // Free the memory allocated by NMTAllocTest
ctornqvi@4512: WB_ENTRY(jboolean, WB_NMTFreeTestMemory(JNIEnv* env))
ctornqvi@4512: 
ctornqvi@4512:   if (nmtMtTest1 == NULL || nmtMtTest2 == NULL || nmtMtTest3 == NULL) {
ctornqvi@4512:     return false;
ctornqvi@4512:   }
ctornqvi@4512: 
ctornqvi@4512:   os::free(nmtMtTest1, mtTest);
ctornqvi@4512:   nmtMtTest1 = NULL;
ctornqvi@4512:   os::free(nmtMtTest2, mtTest);
ctornqvi@4512:   nmtMtTest2 = NULL;
ctornqvi@4512:   os::free(nmtMtTest3, mtTest);
ctornqvi@4512:   nmtMtTest3 = NULL;
ctornqvi@4512: 
ctornqvi@4512:   return true;
ctornqvi@4512: WB_END
ctornqvi@4512: 
ctornqvi@4512: // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature
ctornqvi@4512: WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env))
ctornqvi@4512: 
ctornqvi@4512:   if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
ctornqvi@4512:     return false;
ctornqvi@4512:   }
ctornqvi@4512: 
ctornqvi@4512:   return MemTracker::wbtest_wait_for_data_merge();
ctornqvi@4512: WB_END
ctornqvi@4512: 
ctornqvi@4512: #endif // INCLUDE_NMT
ctornqvi@4512: 
iignatyev@4592: static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
iignatyev@4592:   assert(method != NULL, "method should not be null");
iignatyev@4592:   ThreadToNativeFromVM ttn(thread);
iignatyev@4592:   return env->FromReflectedMethod(method);
iignatyev@4592: }
iignatyev@4592: 
iignatyev@4592: WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
iignatyev@4592:   MutexLockerEx mu(Compile_lock);
iignatyev@4592:   CodeCache::mark_all_nmethods_for_deoptimization();
iignatyev@4592:   VM_Deoptimize op;
iignatyev@4592:   VMThread::execute(&op);
iignatyev@4592: WB_END
iignatyev@4592: 
iignatyev@4592: WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method))
iignatyev@4592:   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
iignatyev@4592:   MutexLockerEx mu(Compile_lock);
iignatyev@4592:   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
iignatyev@4592:   int result = 0;
iignatyev@4592:   nmethod* code = mh->code();
iignatyev@4592:   if (code != NULL) {
iignatyev@4592:     code->mark_for_deoptimization();
iignatyev@4592:     ++result;
iignatyev@4592:   }
iignatyev@4592:   result += CodeCache::mark_for_deoptimization(mh());
iignatyev@4592:   if (result > 0) {
iignatyev@4592:     VM_Deoptimize op;
iignatyev@4592:     VMThread::execute(&op);
iignatyev@4592:   }
iignatyev@4592:   return result;
iignatyev@4592: WB_END
iignatyev@4592: 
iignatyev@4592: WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method))
iignatyev@4592:   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
iignatyev@4592:   MutexLockerEx mu(Compile_lock);
iignatyev@4592:   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
iignatyev@4592:   nmethod* code = mh->code();
iignatyev@4592:   if (code == NULL) {
iignatyev@4592:     return JNI_FALSE;
iignatyev@4592:   }
iignatyev@4592:   return (code->is_alive() && !code->is_marked_for_deoptimization());
iignatyev@4592: WB_END
iignatyev@4592: 
iignatyev@4592: WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method))
iignatyev@4592:   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
iignatyev@4592:   MutexLockerEx mu(Compile_lock);
iignatyev@4592:   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
iignatyev@4592:   return !mh->is_not_compilable();
iignatyev@4592: WB_END
iignatyev@4592: 
iignatyev@4592: WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
iignatyev@4592:   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
iignatyev@4592:   MutexLockerEx mu(Compile_lock);
iignatyev@4592:   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
iignatyev@4592:   return mh->queued_for_compilation();
iignatyev@4592: WB_END
iignatyev@4592: 
iignatyev@4592: WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method))
iignatyev@4592:   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
iignatyev@4592:   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
iignatyev@4592:   nmethod* code = mh->code();
iignatyev@4592:   return (code != NULL ? code->comp_level() : CompLevel_none);
iignatyev@4592: WB_END
iignatyev@4592: 
iignatyev@4592: 
iignatyev@4592: WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method))
iignatyev@4592:   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
iignatyev@4592:   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
iignatyev@4592:   mh->set_not_compilable();
iignatyev@4592: WB_END
iignatyev@4592: 
iignatyev@4592: WB_ENTRY(jboolean, WB_SetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
iignatyev@4592:   jmethodID jmid = reflected_method_to_jmid(thread, env, method);
iignatyev@4592:   methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
iignatyev@4592:   bool result = mh->dont_inline();
iignatyev@4592:   mh->set_dont_inline(value == JNI_TRUE);
iignatyev@4592:   return result;
iignatyev@4592: WB_END
iignatyev@4592: 
iignatyev@4592: WB_ENTRY(jint, WB_GetCompileQueuesSize(JNIEnv* env, jobject o))
iignatyev@4592:   return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
iignatyev@4592:          CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
iignatyev@4592: WB_END
iignatyev@4592: 
mgerdin@4850: WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
mgerdin@4850:   ResourceMark rm(THREAD);
mgerdin@4850:   int len;
mgerdin@4850:   jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len);
mgerdin@4850:   oop found_string = StringTable::the_table()->lookup(name, len);
mgerdin@4850:   if (found_string == NULL) {
mgerdin@4850:         return false;
mgerdin@4850:   }
mgerdin@4850:   return true;
mgerdin@4850: WB_END
mgerdin@4850: 
mgerdin@4850: 
mgerdin@4850: WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
mgerdin@4850:   Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
mgerdin@4850:   Universe::heap()->collect(GCCause::_last_ditch_collection);
mgerdin@4850: WB_END
mgerdin@4850: 
mgerdin@4850: 
nloodin@3681: //Some convenience methods to deal with objects from java
nloodin@3681: int WhiteBox::offset_for_field(const char* field_name, oop object,
nloodin@3681:     Symbol* signature_symbol) {
nloodin@3681:   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
nloodin@3681:   Thread* THREAD = Thread::current();
nloodin@3681: 
nloodin@3681:   //Get the class of our object
coleenp@4037:   Klass* arg_klass = object->klass();
nloodin@3681:   //Turn it into an instance-klass
coleenp@4037:   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
nloodin@3681: 
nloodin@3681:   //Create symbols to look for in the class
nloodin@3681:   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
nloodin@3681:       THREAD);
nloodin@3681: 
nloodin@3681:   //To be filled in with an offset of the field we're looking for
nloodin@3681:   fieldDescriptor fd;
nloodin@3681: 
coleenp@4037:   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
nloodin@3681:   if (res == NULL) {
nloodin@3681:     tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
nloodin@3681:         name_symbol->as_C_string());
nloodin@3681:     fatal("Invalid layout of preloaded class");
nloodin@3681:   }
nloodin@3681: 
nloodin@3681:   //fetch the field at the offset we've found
nloodin@3681:   int dest_offset = fd.offset();
nloodin@3681: 
nloodin@3681:   return dest_offset;
nloodin@3681: }
nloodin@3681: 
nloodin@3681: 
nloodin@3681: const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
nloodin@3681:   int offset = offset_for_field(field_name, object,
nloodin@3681:       vmSymbols::string_signature());
nloodin@3681:   oop string = object->obj_field(offset);
sla@3905:   if (string == NULL) {
sla@3905:     return NULL;
sla@3905:   }
nloodin@3681:   const char* ret = java_lang_String::as_utf8_string(string);
nloodin@3681:   return ret;
nloodin@3681: }
nloodin@3681: 
nloodin@3681: bool WhiteBox::lookup_bool(const char* field_name, oop object) {
nloodin@3681:   int offset =
nloodin@3681:       offset_for_field(field_name, object, vmSymbols::bool_signature());
nloodin@3681:   bool ret = (object->bool_field(offset) == JNI_TRUE);
nloodin@3681:   return ret;
nloodin@3681: }
nloodin@3681: 
nloodin@3681: 
mgerdin@3619: #define CC (char*)
mgerdin@3619: 
mgerdin@3619: static JNINativeMethod methods[] = {
mgerdin@3619:   {CC"getObjectAddress",   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
mgerdin@3619:   {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
iignatyev@4592:   {CC"isClassAlive0",      CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
iignatyev@4592:   {CC"parseCommandLine",
iignatyev@4592:       CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
nloodin@3681:       (void*) &WB_ParseCommandLine
nloodin@3681:   },
jprovino@4542: #if INCLUDE_ALL_GCS
mgerdin@3619:   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
mgerdin@3619:   {CC"g1IsHumongous",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
mgerdin@3619:   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
mgerdin@3619:   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
jprovino@4542: #endif // INCLUDE_ALL_GCS
ctornqvi@4512: #ifdef INCLUDE_NMT
ctornqvi@4512:   {CC"NMTAllocTest",       CC"()Z",                   (void*)&WB_NMTAllocTest      },
ctornqvi@4512:   {CC"NMTFreeTestMemory",  CC"()Z",                   (void*)&WB_NMTFreeTestMemory },
ctornqvi@4512:   {CC"NMTWaitForDataMerge",CC"()Z",                   (void*)&WB_NMTWaitForDataMerge},
ctornqvi@4512: #endif // INCLUDE_NMT
iignatyev@4592:   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
iignatyev@4592:   {CC"deoptimizeMethod",   CC"(Ljava/lang/reflect/Method;)I",
iignatyev@4592:                                                       (void*)&WB_DeoptimizeMethod  },
iignatyev@4592:   {CC"isMethodCompiled",   CC"(Ljava/lang/reflect/Method;)Z",
iignatyev@4592:                                                       (void*)&WB_IsMethodCompiled  },
iignatyev@4592:   {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Method;)Z",
iignatyev@4592:                                                       (void*)&WB_IsMethodCompilable},
iignatyev@4592:   {CC"isMethodQueuedForCompilation",
iignatyev@4592:       CC"(Ljava/lang/reflect/Method;)Z",              (void*)&WB_IsMethodQueuedForCompilation},
iignatyev@4592:   {CC"makeMethodNotCompilable",
iignatyev@4592:       CC"(Ljava/lang/reflect/Method;)V",              (void*)&WB_MakeMethodNotCompilable},
iignatyev@4592:   {CC"setDontInlineMethod",
iignatyev@4592:       CC"(Ljava/lang/reflect/Method;Z)Z",             (void*)&WB_SetDontInlineMethod},
iignatyev@4592:   {CC"getMethodCompilationLevel",
iignatyev@4592:       CC"(Ljava/lang/reflect/Method;)I",              (void*)&WB_GetMethodCompilationLevel},
iignatyev@4592:   {CC"getCompileQueuesSize",
iignatyev@4592:       CC"()I",                                        (void*)&WB_GetCompileQueuesSize},
mgerdin@4850:   {CC"isInStringTable",   CC"(Ljava/lang/String;)Z",  (void*)&WB_IsInStringTable  },
mgerdin@4850:   {CC"fullGC",   CC"()V",                             (void*)&WB_FullGC },
mgerdin@3619: };
mgerdin@3619: 
mgerdin@3619: #undef CC
mgerdin@3619: 
mgerdin@3619: JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
mgerdin@3619:   {
mgerdin@3619:     if (WhiteBoxAPI) {
mgerdin@3619:       // Make sure that wbclass is loaded by the null classloader
mgerdin@3619:       instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
mgerdin@3619:       Handle loader(ikh->class_loader());
mgerdin@3619:       if (loader.is_null()) {
mgerdin@3619:         ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
mgerdin@3619:         jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
mgerdin@3619:         if (result == 0) {
mgerdin@3619:           WhiteBox::set_used();
mgerdin@3619:         }
mgerdin@3619:       }
mgerdin@3619:     }
mgerdin@3619:   }
mgerdin@3619: JVM_END