Name: tb29552 Date: 06/17/97


The JDK 1.1.2 javac compiler hangs when compiling a particluarly
complicated piece of code which uses many inner/anonymous classes.
I have been able to isolate the problem to the following code
example (which is not a runnable program).

public class DSUser {

  interface MessageHandler {
    void handle(Object resource);
  }

  abstract class InvokeHandler implements MessageHandler {

    abstract boolean checkMessage(Object resource);
    
    public void handle(Object resource) {
      checkMessage(resource);
    }
  }
  
  private void invoke() {

    class DSAMessageHandler extends InvokeHandler {

      boolean checkMessage(Object resource) {
return false;
      }
      
    }
  }

  private void login() {
    while(true) {
      (new Thread(new Runnable() {
public void run() {
invoke();
}
      })).start();
    }
  }
}

Here is the output from the compiler in verbose mode:

adams:~/java/javac-innerclass-bug>javac -verbose DSUser.java
[parsed DSUser.java in 548 ms]
[loaded /usr/dist/jdk1.1.2/bin/../lib/classes.zip(java/lang/Object.class) in 79 ms]
[checking class DSUser]
[checking class DSUser. 1$DSAMessageHandler]
[loaded /usr/dist/jdk1.1.2/bin/../lib/classes.zip(java/lang/Thread.class) in 61 ms]
[loaded /usr/dist/jdk1.1.2/bin/../lib/classes.zip(java/lang/Runnable.class) in 4 ms]
[checking class DSUser. 1]
[loaded /usr/dist/jdk1.1.2/bin/../lib/classes.zip(java/lang/String.class) in 69 ms]
 
This is the thread dump (which is different depending on when
I perform the dump):

Full thread dump:
    "Finalizer thread" (TID:0xee598220, sys_thread_t:0xee2c1de0, state:R) prio=1
    "Async Garbage Collector" (TID:0xee5981d8, sys_thread_t:0xee2f1de0, state:R) prio=1
    "Idle thread" (TID:0xee598190, sys_thread_t:0xee3c1de0, state:R) prio=0
    "Clock" (TID:0xee5980d0, sys_thread_t:0xee3f1de0, state:CW) prio=12
    "main" (TID:0xee5980a8, sys_thread_t:0x40e30, state:R) prio=5 *current thread*
        sun.tools.tree.Context.checkBackBranch(Context.java)
        sun.tools.tree.WhileStatement.check(WhileStatement.java)
        sun.tools.tree.Statement.checkBlockStatement(Statement.java)
        sun.tools.tree.CompoundStatement.check(CompoundStatement.java)
        sun.tools.tree.Statement.checkMethod(Statement.java)
        sun.tools.javac.SourceField.check(SourceField.java)
        sun.tools.javac.SourceClass.checkFields(SourceClass.java)
        sun.tools.javac.SourceClass.checkInternal(SourceClass.java)
        sun.tools.javac.SourceClass.check(SourceClass.java)
        sun.tools.javac.Main.compile(Main.java)
        sun.tools.javac.Main.main(Main.java)
Monitor Cache Dump:
    sun.tools.javac.Main@EE59D3E0/EE753278: owner "main" (0x40e30, 1 entry)
Registered Monitor Dump:
    Thread queue lock: <unowned>
    Name and type hash table lock: <unowned>
    String intern lock: <unowned>
    JNI pinning lock: <unowned>
    JNI global reference lock: <unowned>
    BinClass lock: <unowned>
    Class loading lock: <unowned>
    Java stack lock: <unowned>
    Code rewrite lock: <unowned>
    Heap lock: <unowned>
    Has finalization queue lock: <unowned>
    Finalize me queue lock: <unowned>
    Monitor IO lock: <unowned>
    Child death monitor: <unowned>
    Event monitor: <unowned>
    I/O monitor: <unowned>
    Alarm monitor: <unowned>
        Waiting to be notified:
            "Clock"
    Sbrk lock: <unowned>
    Monitor cache expansion lock: <unowned>
    Monitor registry: owner "main" (0x40e30, 1 entry)
Thread Alarm Q:

company - Visigenic Software, Inc. , email - ###@###.###
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