Beispiel #1
0
  /** @param cp */
  public void resolveCPool(ConstantPool cp) {

    Constant[] ca = cp.getConstantPool();
    cpoolArry = new int[cpoolUsed.size()];
    cpoolComments = new String[ca.length];

    // System.out.println(clazz.getClassName()+" cpool "+cpoolUsed);

    for (int i = 0; i < ca.length; ++i) {
      Constant co = ca[i];
      Integer idx = new Integer(i);
      // pos is the new position in the reduced constant pool
      // idx is the position in the 'original' unresolved cpool
      int pos = cpoolUsed.indexOf(idx);
      if (pos != -1) {
        boolean isInterface = false;
        // System.out.println("cpool@"+pos+" = orig_cp@"+i+" "+co);
        switch (co.getTag()) {
          case Constants.CONSTANT_Integer:
            cpoolArry[pos] = ((ConstantInteger) co).getBytes();
            cpoolComments[pos] = "Integer";
            break;
          case Constants.CONSTANT_Long:
            long lval = ((ConstantLong) co).getBytes();
            // store LOW, HIGH words in this order
            int loW = (new Long(0xFFFFFFFF & lval)).intValue();
            int hiW = (new Long(lval >>> 32)).intValue();
            cpoolArry[pos] = hiW;
            cpoolArry[pos + 1] = loW;
            cpoolComments[pos] = "Long: " + lval;
            cpoolComments[pos + 1] = "";
            break;
          case Constants.CONSTANT_Float:
            float fval = ((ConstantFloat) co).getBytes();
            cpoolArry[pos] = Float.floatToRawIntBits(fval);
            cpoolComments[pos] = "Float: " + fval;
            break;
          case Constants.CONSTANT_Double:
            double dval = ((ConstantDouble) co).getBytes();
            long d_lval = Double.doubleToRawLongBits(dval);
            // store LOW, HIGH words in this order
            int d_loW = (new Long(0xFFFFFFFF & d_lval)).intValue();
            int d_hiW = (new Long(d_lval >>> 32)).intValue();
            cpoolArry[pos] = d_hiW;
            cpoolArry[pos + 1] = d_loW;
            cpoolComments[pos] = "Double: " + dval;
            cpoolComments[pos + 1] = "";
            break;
          case Constants.CONSTANT_String:
            String str = ((ConstantString) co).getBytes(cp);
            StringInfo si = StringInfo.getStringInfo(str);
            cpoolArry[pos] = StringInfo.stringTableAddress + si.getAddress();
            cpoolComments[pos] = "String: " + si.getSaveString();
            break;
          case Constants.CONSTANT_Class:
            String clname = ((ConstantClass) co).getBytes(cp).replace('/', '.');
            JopClassInfo clinfo = (JopClassInfo) appInfo.cliMap.get(clname);
            if (clinfo == null) {
              cpoolComments[pos] = "Problem with class: " + clname;
              String type = clname.substring(clname.length() - 2);
              if (type.charAt(0) == '[') {
                switch (type.charAt(1)) {
                  case 'Z':
                    cpoolArry[pos] = 4;
                    break;
                  case 'C':
                    cpoolArry[pos] = 5;
                    break;
                  case 'F':
                    cpoolArry[pos] = 6;
                    break;
                  case 'D':
                    cpoolArry[pos] = 7;
                    break;
                  case 'B':
                    cpoolArry[pos] = 8;
                    break;
                  case 'S':
                    cpoolArry[pos] = 9;
                    break;
                  case 'I':
                    cpoolArry[pos] = 10;
                    break;
                  case 'J':
                    cpoolArry[pos] = 11;
                    break;
                  default:; // all other types are missing...
                }
              }
              // System.out.println(cpoolComments[pos]+" "+type+" "+cpoolArry[pos]);
              continue;
            }
            cpoolArry[pos] = clinfo.classRefAddress;
            cpoolComments[pos] = "Class: " + clname;
            break;
          case Constants.CONSTANT_InterfaceMethodref:
            isInterface = true;
          case Constants.CONSTANT_Methodref:
            // find the class for this method
            int mclidx;
            if (isInterface) {
              mclidx = ((ConstantInterfaceMethodref) co).getClassIndex();
            } else {
              mclidx = ((ConstantMethodref) co).getClassIndex();
            }
            ConstantClass mcl = (ConstantClass) cp.getConstant(mclidx);
            // the method has "/" instead of ".", fix that
            // now get the signature too...
            String mclname = mcl.getBytes(cp).replace('/', '.');
            int sigidx;
            if (isInterface) {
              sigidx = ((ConstantInterfaceMethodref) co).getNameAndTypeIndex();
            } else {
              sigidx = ((ConstantMethodref) co).getNameAndTypeIndex();
            }
            ConstantNameAndType signt = (ConstantNameAndType) cp.getConstant(sigidx);
            String sigstr = signt.getName(cp) + signt.getSignature(cp);
            // now find the address of the method struct!
            JopClassInfo clinf = (JopClassInfo) appInfo.cliMap.get(mclname);
            if (clinf == null) {
              // probably a reference to Native - a class that
              // is NOT present in the application.
              // we could avoid this by not adding method refs to
              // Native in our reduced cpool.
              cpoolArry[pos] = 0;
              cpoolComments[pos] = "static " + mclname + "." + sigstr;
              break;
            }
            JopMethodInfo minf;
            if (isInterface) {
              minf = clinf.getITMethodInfo(sigstr);
            } else {
              minf = clinf.getVTMethodInfo(sigstr);
            }
            if (minf == null) {
              System.out.println(
                  "Error: Method " + clinf.clazz.getClassName() + '.' + sigstr + " not found.");
              System.out.println("Invoked by " + clazz.getClassName());
              for (int xxx = 0; xxx < clinf.clvt.len; ++xxx) {
                System.out.println(clinf.clvt.key[xxx]);
              }
              System.exit(1);
            }
            if (minf.getMethod().isStatic()
                ||
                // <init> and privat methods are called with invokespecial
                // which mapps in jvm.asm to invokestatic
                minf.getMethod().isPrivate()
                || sigstr.charAt(0) == '<') {
              // for static methods a direct pointer to the
              // method struct
              cpoolArry[pos] = minf.structAddress;
              cpoolComments[pos] =
                  "static, special or private " + clinf.clazz.getClassName() + "." + minf.methodId;
            } else {
              // as Flavius correctly comments:
              // TODO: CHANGE THIS TO A MORE CONSISTENT FORMAT...
              // extract the objref! for some reason the microcode
              // needs -1 here...weird

              // that's for simple virtual methods
              int vpos = minf.vtindex;
              String comment = "virtual";

              // TODO: is kind of redundant search as we've already
              // searched the IT table with getVTMethodInfo()
              // TODO: do we handle different interfaces with same
              // method id correct? (see buildIT)
              if (isInterface) {
                comment = "interface";
                for (int j = 0; j < listIT.size(); ++j) {
                  IT it = (IT) listIT.get(j);
                  if (it.key.equals(minf.methodId)) {
                    vpos = j;
                    break;
                  }
                }
                // offest in interface table
                // index plus number of arguments (without this!)
                cpoolArry[pos] = (vpos << 8) + (minf.margs - 1);
              } else {
                // offest in method table
                // (index*2) plus number of arguments (without
                // this!)
                cpoolArry[pos] = (vpos * ClassStructConstants.METH_STR << 8) + (minf.margs - 1);
              }
              cpoolComments[pos] =
                  comment
                      + " index: "
                      + vpos
                      + " args: "
                      + minf.margs
                      + " "
                      + clinf.clazz.getClassName()
                      + "."
                      + minf.methodId;
            }
            break;
          case Constants.CONSTANT_Fieldref:
            throw new Error("Fieldref should not be used anymore");
            //					int fidx = ((ConstantFieldref) co).getClassIndex();
            //					ConstantClass fcl = (ConstantClass) cp.getConstant(fidx);
            //					String fclname = fcl.getBytes(cp).replace('/', '.');
            //					// got the class name
            //					sigidx = ((ConstantFieldref) co).getNameAndTypeIndex();
            //					signt = (ConstantNameAndType) cp.getConstant(sigidx);
            //					sigstr = signt.getName(cp) + signt.getSignature(cp);
            //					clinf = (JopClassInfo) appInfo.cliMap.get(fclname);
            //					int j;
            //					String comment = "";
            //					boolean found = false;
            //					while (!found) {
            //						for (j = 0; j < clinf.clft.len; ++j) {
            //							if (clinf.clft.key[j].equals(sigstr)) {
            //								found = true;
            //								if (clinf.clft.isStatic[j]) {
            //									comment = "static ";
            //								}
            //								// for static fields a direct pointer to the
            //								// static field
            //								cpoolArry[pos] = clinf.clft.idx[j];
            //								cpoolComments[pos] = comment
            //										+ clinf.clazz.getClassName() + "."
            //										+ sigstr;
            //								break;
            //							}
            //						}
            //						if (!found) {
            //							clinf = (JopClassInfo) clinf.superClass;
            //							if (clinf == null) {
            //								System.out.println("Error: field " + fclname
            //										+ "." + sigstr + " not found!");
            //								break;
            //							}
            //						}
            //					}
            //					break;
          default:
            System.out.println("TODO: cpool@" + pos + " = orig_cp@" + i + " " + co);
            cpoolComments[pos] = "Problem with: " + co;
        }
      }
    }
  }
Beispiel #2
0
  /**
   * Calculate the size of the class info table, adjust the addresses and return the next available
   * address. Calculate GC info for the instance.
   *
   * @param addr
   * @return
   */
  public int setAddress(OldAppInfo ai, int addr) {

    int i;
    instGCinfo = getGCInfo();
    classRefAddress = addr;
    // class head contains the instance size and
    // a pointer to the interface table
    // class references point to the instance size
    addr += ClassStructConstants.CLS_HEAD;
    // start of the method table, objects contain a pointer
    // to the start of this table (at ref-1)
    if (!clazz.isInterface()) {
      methodsAddress = addr;
      for (i = 0; i < clvt.len; ++i) {
        JopMethodInfo m = clvt.mi[i];
        m.vtindex = i;
        m.structAddress = addr;
        if (clazz.getClassName().equals(JOPizer.startupClass)) {
          if (m.methodId.equals(JOPizer.bootMethod)) {
            bootAddress = addr;
          }
        }
        if (clazz.getClassName().equals(ai.mainClass)) {
          if (m.methodId.equals(JOPizer.mainMethod)) {
            mainAddress = addr;
          }
        }
        addr += ClassStructConstants.METH_STR;
      }
    }
    // back reference from cp-1 to class struct
    addr += 1;
    // constant pool
    cpoolAddress = addr;

    // System.out.println(clazz.getClassName()+"
    // cplen="+clazz.getConstantPool().getLength());
    // the final size of the cp plus the length field
    addr += cpoolUsed.size() + 1;

    // the optional interface table
    iftableAddress = 0;

    boolean needsInterfaceTable = false;
    for (i = 0; i < listIT.size(); i++) {
      IT it = (IT) listIT.get(i);
      boolean matchMethod = methods.containsKey(it.meth.methodId);

      boolean matchInterface = implementsInterface(it.meth.getCli().clazz.getClassName());
      if (matchMethod && matchInterface) {
        needsInterfaceTable = true;
      }
    }

    if (superClass != null) {
      String[] interfaceNames = clazz.getInterfaceNames();
      for (i = 0; i < interfaceNames.length; i++) {
        if (!((JopClassInfo) superClass).implementsInterface(interfaceNames[i])) {
          needsInterfaceTable = true;
        }
      }
    } else {
      needsInterfaceTable = clazz.getInterfaceNames().length > 0;
    }

    if (needsInterfaceTable) {
      addr += (interfaceCnt + 31) / 32;
      iftableAddress = addr;
      if (!clazz.isInterface()) {
        addr += listIT.size();
      }
    }

    // add method count of class Object !
    if (clazz.getClassName().equals(JOPizer.jvmClass)) {
      jvmAddress = methodsAddress + nrObjMethods * ClassStructConstants.METH_STR;
    }
    if (clazz.getClassName().equals(JOPizer.helpClass)) {
      jvmHelpAddress = methodsAddress + nrObjMethods * ClassStructConstants.METH_STR;
    }
    return addr;
  }