/** Returns the constant string at the specified offset */
public static String get_constant_str(ConstantPool pool, int index) {
Constant c = pool.getConstant(index);
if (c instanceof ConstantUtf8) return ((ConstantUtf8) c).getBytes();
else if (c instanceof ConstantClass) {
ConstantClass cc = (ConstantClass) c;
return cc.getBytes(pool) + " [" + cc.getNameIndex() + "]";
} else assert false : "unexpected constant " + c + " class " + c.getClass();
return (null);
}
/**
* Returns all related classes
*
* @param start
* @return
*/
private static Collection<Class<?>> getAllRelatedClasses(Class<?> start) {
List<Class<?>> rval = new ArrayList<Class<?>>();
JavaClass lookupClass;
// In case the class fails, return empty.
try {
lookupClass = Repository.lookupClass(start);
} catch (ClassNotFoundException e) {
e.printStackTrace();
return rval;
}
ConstantPool constantPool = lookupClass.getConstantPool();
int length = constantPool.getLength();
for (int i = 0; i < length; i++) {
Constant constant = constantPool.getConstant(i);
if (constant instanceof ConstantClass) {
ConstantClass cc = (ConstantClass) constant;
ConstantUtf8 constant2 = (ConstantUtf8) constantPool.getConstant(cc.getNameIndex());
// In case a subclass fails, skip, but print warning.
try {
String toLoad = constant2.getBytes().replace('/', '.');
if (toLoad.contains("[")) continue;
Class<?> forName = Class.forName(toLoad);
rval.add(forName);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
}
return rval;
}
/** @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;
}
}
}
}