Java Type类代码示例

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
  Type type                  = db.lookupType("Method");
  constMethod                = type.getAddressField("_constMethod");
  methodData                 = type.getAddressField("_method_data");
  methodCounters             = type.getAddressField("_method_counters");
  methodSize                 = new CIntField(type.getCIntegerField("_method_size"), 0);
  accessFlags                = new CIntField(type.getCIntegerField("_access_flags"), 0);
  code                       = type.getAddressField("_code");
  vtableIndex                = new CIntField(type.getCIntegerField("_vtable_index"), 0);
  bytecodeOffset = type.getSize();

  /*
  interpreterEntry           = type.getAddressField("_interpreter_entry");
  fromCompiledCodeEntryPoint = type.getAddressField("_from_compiled_code_entry_point");

  */
  objectInitializerName = null;
  classInitializerName = null;
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
void dumpType(Type type) {
    out.print("type ");
    quote(type.getName());
    out.print(" ");
    if (type.getSuperclass() != null) {
        quote(type.getSuperclass().getName());
        out.print(" ");
    } else {
        out.print("null ");
    }
    out.print(type.isOopType());
    out.print(" ");
    if (type.isCIntegerType()) {
        out.print("true ");
        out.print(((CIntegerType)type).isUnsigned());
        out.print(" ");
    } else {
        out.print("false false ");
    }
    out.print(type.getSize());
    out.println();
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
void dumpFields(Type type, boolean allowStatic) {
    Iterator i = type.getFields();
    while (i.hasNext()) {
        Field f = (Field) i.next();
        if (!allowStatic && f.isStatic()) continue;
        out.print("field ");
        quote(type.getName());
        out.print(" ");
        out.print(f.getName());
        out.print(" ");
        quote(f.getType().getName());
        out.print(" ");
        out.print(f.isStatic());
        out.print(" ");
        if (f.isStatic()) {
            out.print("0 ");
            out.print(f.getStaticFieldAddress());
        } else {
            out.print(f.getOffset());
            out.print(" 0x0");
        }
        out.println();
    }
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
private static void initialize(TypeDataBase db) {
  Type type = db.lookupType("CodeBlob");

  nameField                = type.getAddressField("_name");
  sizeField                = type.getCIntegerField("_size");
  headerSizeField          = type.getCIntegerField("_header_size");
  frameCompleteOffsetField = type.getCIntegerField("_frame_complete_offset");
  contentBeginField        = type.getAddressField("_content_begin");
  codeBeginField           = type.getAddressField("_code_begin");
  codeEndField             = type.getAddressField("_code_end");
  dataEndField             = type.getAddressField("_data_end");
  dataOffsetField          = type.getCIntegerField("_data_offset");
  frameSizeField           = type.getCIntegerField("_frame_size");
  oopMapsField             = type.getAddressField("_oop_maps");

  if (VM.getVM().isServerCompiler()) {
    matcherInterpreterFramePointerReg =
        db.lookupIntConstant("Matcher::interpreter_frame_pointer_reg").intValue();
  }
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
  Type type      = db.lookupType("ciInstanceKlass");
  initStateField = new CIntField(type.getCIntegerField("_init_state"), 0);
  isSharedField = new CIntField(type.getCIntegerField("_is_shared"), 0);
  CLASS_STATE_LINKED = db.lookupIntConstant("InstanceKlass::linked").intValue();
  CLASS_STATE_FULLY_INITIALIZED = db.lookupIntConstant("InstanceKlass::fully_initialized").intValue();
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
private static synchronized void initialize(TypeDataBase db) {
  // klass and oop_size are HotSpot magic fields and hence we can't
  // find them from InstanceKlass for java.lang.Class.
  Type jlc = db.lookupType("java_lang_Class");
  klassOffset = (int) jlc.getCIntegerField("_klass_offset").getValue();
  int oopSizeOffset = (int) jlc.getCIntegerField("_oop_size_offset").getValue();
  oopSizeField = new IntField(new NamedFieldIdentifier("oop_size"), oopSizeOffset, true);
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
static private synchronized void initialize(TypeDataBase db) {
    Type type = db.lookupType("G1MonitoringSupport");

    edenCommittedField = type.getCIntegerField("_eden_committed");
    edenUsedField = type.getCIntegerField("_eden_used");
    survivorCommittedField = type.getCIntegerField("_survivor_committed");
    survivorUsedField = type.getCIntegerField("_survivor_used");
    oldCommittedField = type.getCIntegerField("_old_committed");
    oldUsedField = type.getCIntegerField("_old_used");
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
static private synchronized void initialize(TypeDataBase db) {
    Type type = db.lookupType("G1CollectedHeap");

    hrsFieldOffset = type.getField("_hrs").getOffset();
    g1CommittedFieldOffset = type.getField("_g1_committed").getOffset();
    summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used");
    g1mmField = type.getAddressField("_g1mm");
    oldSetFieldOffset = type.getField("_old_set").getOffset();
    humongousSetFieldOffset = type.getField("_humongous_set").getOffset();
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
static private synchronized void initialize(TypeDataBase db) {
    Type type = db.lookupType("HeapRegionSetBase");

    lengthField         = type.getCIntegerField("_length");
    regionNumField      = type.getCIntegerField("_region_num");
    totalUsedBytesField = type.getCIntegerField("_total_used_bytes");
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
public void doit(Tokens t) {
    if (t.countTokens() != 2) {
        usage();
    } else {
        Type type = agent.getTypeDataBase().lookupType(t.nextToken());
        Address a = VM.getVM().getDebugger().parseAddress(t.nextToken());
        CTypeTreeNodeAdapter node = new CTypeTreeNodeAdapter(a, type, null);

        out.println("pointer to " + type + " @ " + a +
                    " (size = " + type.getSize() + ")");
        printNode(node);
    }
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
public Type lookupType(String cTypeName, boolean throwException) {
  Type type = (Type) nameToTypeMap.get(cTypeName);
  if (type == null && throwException) {
    throw new RuntimeException("No type named \"" + cTypeName + "\" in database");
  }
  return type;
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
private Address vtblForType(Type type) {
  Address vtblAddr = (Address)typeToVtbl.get(type);
  if (vtblAddr == null) {
    vtblAddr = vtblAccess.getVtblForType(type);
    if (vtblAddr != null) {
      typeToVtbl.put(type, vtblAddr);
    }
  }
  return vtblAddr;
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
public Type guessTypeForAddress(Address addr) {
  for (Iterator iter = getTypes(); iter.hasNext(); ) {
    Type t = (Type) iter.next();
    if (addressTypeIsEqualToType(addr, t)) {
      return t;
    }
  }
  return null;
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
/** This method should only be used by the builder of the
    TypeDataBase. Throws a RuntimeException if a class with this
    name was already present. */
public void addType(Type type) {
  if (nameToTypeMap.get(type.getName()) != null) {
    throw new RuntimeException("type of name \"" + type.getName() + "\" already present");
  }

  nameToTypeMap.put(type.getName(), type);
}
 

import sun.jvm.hotspot.types.Type; //导入依赖的package包/类
/** This method should only be used by the builder of the
    TypeDataBase. Throws a RuntimeException if this class was not
    present. */
public void removeType(Type type) {
  Type curType = (Type) nameToTypeMap.get(type.getName());
  if (curType == null) {
    throw new RuntimeException("type of name \"" + type.getName() + "\" not present");
  }

  if (!curType.equals(type)) {
    throw new RuntimeException("a different type of name \"" + type.getName() + "\" was present");
  }

  nameToTypeMap.remove(type.getName());
}