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  1. JDK
  2. JDK-4095934

different linking exceptions thrown in the same situation.

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    • Subcomponent:
    • CPU:
      sparc
    • OS:
      solaris_2.4

      Description



      Name: akC45999 Date: 12/01/97



      let we have a class named "bad" that implements an interface "intrf"
      but declares interface method m1 as private.

      Then, if we try to instantiate it, JVM throws an exception
      when executing "new" instruction. The problem is that if we try
      to execute the "new" instruction one more time,
      different exeption is thrown.

      May be worst of all, JVM does not specify any exception
      to be thrown in this situation.

      ----------------- file test.jasm
      // the test case is provided by Steve Russell <###@###.###>
      // and rewritten in jasm since java compiler would not directly compile such code

      abstract interface intrf {

      public abstract Method m1:"()V";

      } // end Class intrf


      class bad implements intrf {

      private Method m1:"()V" // <--- should be public
           stack 1 locals 1
      {
          return
      }

      Method <init>:"()V"
           stack 1 locals 1
      {
          aload_0;
          invokespecial java/lang/Object.<init>:"()V";
          return;
      }

      } // end Class bad


      public super class test {

      public static Method run:"([Ljava/lang/String;Ljava/io/PrintStream;)I"
      stack 3 locals 6
      {
      iconst_0;
      istore_2;
      iconst_1;
      istore_3;
      Loop:
      new class java/lang/StringBuffer;
      dup;
      ldc String "step ";
      invokespecial Method java/lang/StringBuffer."<init>":"(Ljava/lang/String;)V";
      iload_3;
      invokevirtual Method java/lang/StringBuffer.append:"(I)Ljava/lang/StringBuffer;";
      astore 4;
      try t3;
      new class bad;
      endtry t3;
      pop;
      iconst_2;
      istore_2;
      aload 4;
      ldc String " no exception";
      invokevirtual Method java/lang/StringBuffer.append:"(Ljava/lang/String;)Ljava/lang/StringBuffer;";
      pop;
      goto Print;
      catch t3 java/lang/Throwable;
      astore 5;
      aload 4;
      ldc String " exception: ";
      invokevirtual Method java/lang/StringBuffer.append:"(Ljava/lang/String;)Ljava/lang/StringBuffer;";
      aload 5;
      invokevirtual Method java/lang/StringBuffer.append:"(Ljava/lang/Object;)Ljava/lang/StringBuffer;";
      pop;
      Print:
      aload_1;
      aload 4;
      invokevirtual Method java/io/PrintStream.println:"(Ljava/lang/Object;)V";
      Continue:
      iinc 3, 1;
      iload_3;
      iconst_2;
      if_icmple Loop;
      iload_2;
      ireturn;
      }

      public static Method main:"([Ljava/lang/String;)V"
      stack 2 locals 1
      {
      aload_0;
      getstatic Field java/lang/System.out:"Ljava/io/PrintStream;";
      invokestatic Method run:"([Ljava/lang/String;Ljava/io/PrintStream;)I";
      bipush 95;
      iadd;
      invokestatic Method java/lang/System.exit:"(I)V";
      return;
      }

      } // end Class test
      ----------------- end of file test.jasm

      Running the test:
      novo64% jasm test.jasm
      novo64% java test
      step 1 exception: java.lang.IllegalAccessError: Unimplemented interface method
      step 2 exception: java.lang.IncompatibleClassChangeError: bad
      novo64%

      ======================================================================

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            Assignee:
            sliangsunw Sheng Liang (Inactive)
            Reporter:
            rfqsunw Rfq Rfq (Inactive)
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