Name: szC45993 Date: 04/09/98



The JCK
vm/concepts/execution/execution054/execution05402/execution05402.html
test shows that Class.forName does not provide the static initializing of
the loaded class if USER-defined class loader is used for jdk1.2b3N jvm.

Short test sources are represented below.

For the reproducing of the bug need to do the following:

setenv CLASSPATH .
novo7% /export/ld14/java/dest/jdk1.2b3N/solaris/bin/javac -d . *.java
Note: execution05402g.java uses or overrides a deprecated API. Recompile with "-deprecation" for details.
1 warning
novo7% mkdir 1; cd 1; mkdir 2; cd 2; mkdir 3; cd ../..
novo7% cp execution05402.class 1/2/3;cp execution05402z.class 1/2/3;rm execution05402.class execution05402z.class
novo7% /export/ld14/java/dest/jdk1.2b3N/solaris/bin/java -verify execution05402g
TEST before forName
TEST after forName,1
iii= 3
ERROR: Class.forName and USER-defined class loader do not provide the static initializing of the loaded class!!!
novo7%
----------------------------------------------------------------------------



SOURCES:


--------------------- execution05402g.java
import java.io.PrintStream;
import java.io.*;
import java.util.Hashtable;

class Loader extends ClassLoader
    {
Loader(File dir) {
loadDir = dir;
}


//----------ClassLoader methods--------------------------------------------------

/**
* Attempt to load a class if it is not already loaded, and optionally
* resolve any imports it might have.
* @exception ClassNotFoundException The class was not found.
*/
protected Class loadClass(String name, boolean resolve)
throws ClassNotFoundException {

/// System.out.println("### pusk ###: "+name+", "+resolve);
Class cl = (Class)classes.get(name);

if (cl == null) {
try {
/// System.out.println("### findSystemClass ###: "+name);
return findSystemClass(name);
}
catch (Throwable e) {
/// System.out.println("### findSystemClass ###: "+e);
}

/// System.out.println("### loadClass ###: "+name);
cl = findClass(name);
}

if (cl == null)
throw new ClassNotFoundException(name);

if (resolve)
resolveClass(cl);

return cl;
}

//----------Internal methods-----------------------------------------------------

synchronized Class findClass(String name) {
Class cl = (Class)classes.get(name);
if (cl != null)
return cl;

String cname = name.replace('.', '/') + ".class";

File file = new File(loadDir, cname);
/// System.out.println("***************** file name: "+cname);
/// System.out.println("***************** file: "+file);
cl = loadClass(file);
/// System.out.println("***************** cl: "+cl);
if (cl != null) {
if (!name.equals(cl.getName()))
throw new ClassFormatError(name + " != " + cl.getName());
classes.put(name, cl);
}

return cl;
}

synchronized Class loadClass(File file) {
try {
InputStream in = new FileInputStream(file);
try {
int len = in.available();
byte data[] = new byte[len];
for (int total = 0; total < data.length; ) {
total += in.read(data, total, data.length - total);
}
return defineClass(data, 0, data.length);
}
finally {
if (in != null)
in.close();
}
} catch (Throwable e) {
return null;
}
}

//----------Data members---------------------------------------------------------

private File loadDir;
private Hashtable classes = new Hashtable();
    }

public class execution05402g {
  public static PrintStream o;

  public static int run(String argv[], PrintStream out) {
Loader ldr = new Loader(new File("1/2/3"));

o = out;
try{
(ldr.loadClass("execution05402z")).newInstance();
} catch (java.lang.Throwable e) {
out.println(e);
return 0;
};

return 0;
  }

  public static void main(String argv[]) {
System.exit(run(argv, System.out) + 95/*STATUS_TEMP*/);
  }
}



--------------------- execution05402z.java
import java.io.PrintStream;

class execution05402 implements Runnable {

  static {

execution05402z.o.println("INITIALIZATION of execution05402");
execution05402z.iii = 6;
  }

  public void run() {
  }
}

public class execution05402z {
  public static int iii = 3;
  public static PrintStream o;

  static {

o = execution05402g.o;
o.println("TEST before forName");
try{
Class cl = Class.forName("execution05402");
// cl.newInstance();

o.println("TEST after forName,1");

} catch (java.lang.Throwable e) {
o.println(e);
};

o.println("iii= "+iii);
if (iii != 6) o.println("ERROR: Class.forName and USER-defined class loader do not provide the static initializing of the loaded class!!!");
  }

}
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Hook 5(hook5): test

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