src/share/vm/prims/whitebox.cpp

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rev 3953 : JDK-8005012: Add WB APIs to better support NMT testing
Summary:


  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 
  40 #ifndef SERIALGC
  41 #include "gc_implementation/g1/concurrentMark.hpp"
  42 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
  43 #include "gc_implementation/g1/heapRegionRemSet.hpp"
  44 #endif // !SERIALGC
  45 




  46 bool WhiteBox::_used = false;
  47 
  48 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  49   return (jlong)(void*)JNIHandles::resolve(obj);
  50 WB_END
  51 
  52 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  53   return heapOopSize;
  54 WB_END
  55 
  56 
  57 class WBIsKlassAliveClosure : public KlassClosure {
  58     Symbol* _name;
  59     bool _found;
  60 public:
  61     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
  62 
  63     void do_klass(Klass* k) {
  64       if (_found) return;
  65       Symbol* ksym = k->name();


  93   return hr->isHumongous();
  94 WB_END
  95 
  96 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
  97   G1CollectedHeap* g1 = G1CollectedHeap::heap();
  98   size_t nr = g1->free_regions();
  99   return (jlong)nr;
 100 WB_END
 101 
 102 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 103   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 104   ConcurrentMark* cm = g1->concurrent_mark();
 105   return cm->concurrent_marking_in_progress();
 106 WB_END
 107 
 108 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 109   return (jint)HeapRegion::GrainBytes;
 110 WB_END
 111 #endif // !SERIALGC
 112 






















































 113 //Some convenience methods to deal with objects from java
 114 int WhiteBox::offset_for_field(const char* field_name, oop object,
 115     Symbol* signature_symbol) {
 116   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
 117   Thread* THREAD = Thread::current();
 118 
 119   //Get the class of our object
 120   Klass* arg_klass = object->klass();
 121   //Turn it into an instance-klass
 122   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
 123 
 124   //Create symbols to look for in the class
 125   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
 126       THREAD);
 127 
 128   //To be filled in with an offset of the field we're looking for
 129   fieldDescriptor fd;
 130 
 131   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
 132   if (res == NULL) {


 160   return ret;
 161 }
 162 
 163 
 164 #define CC (char*)
 165 
 166 static JNINativeMethod methods[] = {
 167   {CC"getObjectAddress",   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
 168   {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
 169   {CC"isClassAlive0",       CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
 170   {CC "parseCommandLine",
 171       CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
 172       (void*) &WB_ParseCommandLine
 173   },
 174 #ifndef SERIALGC
 175   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
 176   {CC"g1IsHumongous",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
 177   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
 178   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
 179 #endif // !SERIALGC





 180 };
 181 
 182 #undef CC
 183 
 184 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
 185   {
 186     if (WhiteBoxAPI) {
 187       // Make sure that wbclass is loaded by the null classloader
 188       instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
 189       Handle loader(ikh->class_loader());
 190       if (loader.is_null()) {
 191         ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
 192         jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
 193         if (result == 0) {
 194           WhiteBox::set_used();
 195         }
 196       }
 197     }
 198   }
 199 JVM_END


  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 
  40 #ifndef SERIALGC
  41 #include "gc_implementation/g1/concurrentMark.hpp"
  42 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
  43 #include "gc_implementation/g1/heapRegionRemSet.hpp"
  44 #endif // !SERIALGC
  45 
  46 #ifdef INCLUDE_NMT
  47 #include "services/memTracker.hpp"
  48 #endif // INCLUDE_NMT
  49 
  50 bool WhiteBox::_used = false;
  51 
  52 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
  53   return (jlong)(void*)JNIHandles::resolve(obj);
  54 WB_END
  55 
  56 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
  57   return heapOopSize;
  58 WB_END
  59 
  60 
  61 class WBIsKlassAliveClosure : public KlassClosure {
  62     Symbol* _name;
  63     bool _found;
  64 public:
  65     WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
  66 
  67     void do_klass(Klass* k) {
  68       if (_found) return;
  69       Symbol* ksym = k->name();


  97   return hr->isHumongous();
  98 WB_END
  99 
 100 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
 101   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 102   size_t nr = g1->free_regions();
 103   return (jlong)nr;
 104 WB_END
 105 
 106 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
 107   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 108   ConcurrentMark* cm = g1->concurrent_mark();
 109   return cm->concurrent_marking_in_progress();
 110 WB_END
 111 
 112 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
 113   return (jint)HeapRegion::GrainBytes;
 114 WB_END
 115 #endif // !SERIALGC
 116 
 117 #ifdef INCLUDE_NMT
 118 // Keep track of the 3 allocations in NMTAllocTest so we can free them later
 119 // on and verify that they're not visible anymore
 120 static void* nmtMtTest1 = NULL, *nmtMtTest2 = NULL, *nmtMtTest3 = NULL;
 121 
 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(jboolean, WB_NMTAllocTest(JNIEnv* env)) 
 125   void *mem;
 126 
 127   if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
 128     return false;
 129   }
 130 
 131   // Allocate 2 * 128k + 256k + 1024k and free the 1024k one to make sure we track 
 132   // everything correctly. Total should be 512k held alive.
 133   nmtMtTest1 = os::malloc(128 * 1024, mtTest);
 134   mem = os::malloc(1024 * 1024, mtTest);
 135   nmtMtTest2 = os::malloc(256 * 1024, mtTest);
 136   os::free(mem, mtTest);
 137   nmtMtTest3 = os::malloc(128 * 1024, mtTest);
 138 
 139   return true;
 140 WB_END
 141 
 142 // Free the memory allocated by NMTAllocTest
 143 WB_ENTRY(jboolean, WB_NMTFreeTestMemory(JNIEnv* env))
 144   
 145   if (nmtMtTest1 == NULL || nmtMtTest2 == NULL || nmtMtTest3 == NULL) {
 146     return false;
 147   }
 148 
 149   os::free(nmtMtTest1, mtTest);
 150   nmtMtTest1 = NULL;
 151   os::free(nmtMtTest2, mtTest);
 152   nmtMtTest2 = NULL;
 153   os::free(nmtMtTest3, mtTest);
 154   nmtMtTest3 = NULL;
 155 
 156   return true;
 157 WB_END
 158 
 159 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature
 160 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env))
 161   
 162   if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
 163     return false;
 164   }  
 165 
 166   return MemTracker::wbtest_wait_for_data_merge();
 167 WB_END
 168 
 169 #endif // INCLUDE_NMT
 170 
 171 //Some convenience methods to deal with objects from java
 172 int WhiteBox::offset_for_field(const char* field_name, oop object,
 173     Symbol* signature_symbol) {
 174   assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
 175   Thread* THREAD = Thread::current();
 176 
 177   //Get the class of our object
 178   Klass* arg_klass = object->klass();
 179   //Turn it into an instance-klass
 180   InstanceKlass* ik = InstanceKlass::cast(arg_klass);
 181 
 182   //Create symbols to look for in the class
 183   TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
 184       THREAD);
 185 
 186   //To be filled in with an offset of the field we're looking for
 187   fieldDescriptor fd;
 188 
 189   Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
 190   if (res == NULL) {


 218   return ret;
 219 }
 220 
 221 
 222 #define CC (char*)
 223 
 224 static JNINativeMethod methods[] = {
 225   {CC"getObjectAddress",   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
 226   {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
 227   {CC"isClassAlive0",       CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
 228   {CC "parseCommandLine",
 229       CC "(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
 230       (void*) &WB_ParseCommandLine
 231   },
 232 #ifndef SERIALGC
 233   {CC"g1InConcurrentMark", CC"()Z",                   (void*)&WB_G1InConcurrentMark},
 234   {CC"g1IsHumongous",      CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous     },
 235   {CC"g1NumFreeRegions",   CC"()J",                   (void*)&WB_G1NumFreeRegions  },
 236   {CC"g1RegionSize",       CC"()I",                   (void*)&WB_G1RegionSize      },
 237 #endif // !SERIALGC
 238 #ifdef INCLUDE_NMT
 239   {CC"NMTAllocTest",       CC"()Z",                   (void*)&WB_NMTAllocTest      },
 240   {CC"NMTFreeTestMemory",  CC"()Z",                   (void*)&WB_NMTFreeTestMemory },
 241   {CC"NMTWaitForDataMerge",CC"()Z",                   (void*)&WB_NMTWaitForDataMerge},
 242 #endif // INCLUDE_NMT
 243 };
 244 
 245 #undef CC
 246 
 247 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
 248   {
 249     if (WhiteBoxAPI) {
 250       // Make sure that wbclass is loaded by the null classloader
 251       instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
 252       Handle loader(ikh->class_loader());
 253       if (loader.is_null()) {
 254         ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
 255         jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
 256         if (result == 0) {
 257           WhiteBox::set_used();
 258         }
 259       }
 260     }
 261   }
 262 JVM_END