Name: viR10068 Date: 11/14/2003


The spec ClassFileFormat.pdf says:
"A method's Code attribute may have at most one StackMap attribute,
otherwise a java.lang.ClassFormatError is thrown."
But the JVM (1.5.0-beta-b28) accepts invalid classfile with 2
StackMap attributes.

The new JCK test is failed due to this error:
vm/cldc/classfmt/stackmap002/stackmap00202m1/stackmap00202m1.html

The test source:
--------------------- test14.jcod ---------------------------
class test14 {
  0xCAFEBABE;
  0;
  49;
  [] { // Constant Pool
    ; // first element is empty
    Method #2 #5; // #1
    class #4; // #2
    Utf8 "t.jasm"; // #3
    Utf8 "java/lang/Object"; // #4
    NameAndType #11 #7; // #5
    Utf8 "SourceFile"; // #6
    Utf8 "()V"; // #7
    Utf8 "Code"; // #8
    class #10; // #9
    Utf8 "test14"; // #10
    Utf8 "<init>"; // #11
    Utf8 "StackMap"; // #12
  } // Constant Pool

  0x0000; // access
  #9;// this_cpx
  #2;// super_cpx

  [] { // Interfaces
  } // Interfaces

  [] { // fields
  } // fields

  [] { // methods
    { // Member
      0x0001; // access
      #11; // name_cpx
      #7; // sig_cpx
      [] { // Attributes
        Attr(#8) { // Code
          1; // max_stack
          1; // max_locals
          Bytes[]{
            0x2AB70001B1;
          };
          [] { // Traps
          } // end Traps
          [] { // Attributes
            Attr(#12) { // StackMap
              [] {}
              };
            Attr(#12) { // StackMap
              [] {}
              }
          } // Attributes
        } // end Code
      } // Attributes
    } // Member
  } // methods

  [] { // Attributes
    Attr(#6) { // SourceFile
      #3;
    } // end SourceFile
  } // Attributes
} // end class
-------------------------------------------------------------
The execution log:
% dest/jdk1.5.0-b28/solaris-sparc/bin/java -showversion -Xfuture test14
java version "1.5.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta-b28)
Java HotSpot(TM) Client VM (build 1.5.0-beta-b28, mixed mode)

Exception in thread "main" java.lang.NoSuchMethodError: main
%

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