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  1. JDK
  2. JDK-8019184

MethodHandles.catchException() fails when methods have 8 args + varargs

    Details

    • Subcomponent:
    • Resolved In Build:
      b100
    • OS:
      generic
    • Verification:
      Verified

      Backports

        Description

        FULL PRODUCT VERSION :
        java version " 1.7.0_40-ea "
        Java(TM) SE Runtime Environment (build 1.7.0_40-ea-b29)
        Java HotSpot(TM) 64-Bit Server VM (build 24.0-b48, mixed mode)


        ADDITIONAL OS VERSION INFORMATION :
        Microsoft Windows [Version 6.1.7600]

        EXTRA RELEVANT SYSTEM CONFIGURATION :
        64 bit OS and VM.

        A DESCRIPTION OF THE PROBLEM :
        When binding an exception handler for a method using java.lang.invoke.MethodHandles.catchException() the binding will fail if the target has eight arguments plus a trailing vararg Object[] argument. Smaller numbers of arguments before the varargs work.

        REGRESSION. Last worked in version 7u25

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        Build attached test case. Run it, and observe the output.

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        java -classpath . MethodHandleBug
        Java Version is 1.7.0_25.

        Working case (8 args).

        Handler is a MethodHandle(Exception)Object.
        Body8 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim8 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim8 with Handler is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Body8 with exception is a MethodHandle(Exception,Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim8 with fallback to body8 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object[])Object.

        Failing case (9 args).

        Handler is a MethodHandle(Exception)Object.
        Body9 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim9 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim9 with Handler is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Body9 with exception is a MethodHandle(Exception,Object,Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim9 with fallback to body9 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object,Object[])Object.

        ACTUAL -
        java -classpath . MethodHandleBug
        Java Version is 1.7.0_40-ea.

        Working case (8 args).

        Handler is a MethodHandle(Exception)Object.
        Body8 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim8 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim8 with Handler is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Body8 with exception is a MethodHandle(Exception,Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim8 with fallback to body8 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object[])Object.

        Failing case (9 args).

        Handler is a MethodHandle(Exception)Object.
        Body9 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim9 is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Prim9 with Handler is a MethodHandle(Object,Object,Object,Object,Object,Object,Object,Object,Object)Object.
        Body9 with exception is a MethodHandle(Exception,Object,Object,Object,Object,Object,Object,Object,Object,Object[])Object.
        Exception in thread " main " java.lang.IllegalArgumentException: target and handler types must match: (Object,Object,Object,Object,Object,Object,Object,Object,Object)Object != (Exception,Object,Object,Object,Object,Object,Object,Object,Object,Object[])Object
        at java.lang.invoke.MethodHandleStatics.newIllegalArgumentException(MethodHandleStatics.java:113)
        at java.lang.invoke.MethodHandles.misMatchedTypes(MethodHandles.java:2182)
        at java.lang.invoke.MethodHandles.catchException(MethodHandles.java:2245)
        at MethodHandleBug.main(MethodHandleBug.java:98)


        ERROR MESSAGES/STACK TRACES THAT OCCUR :
        Exception in thread " main " java.lang.IllegalArgumentException: target and handler types must match: (Object,Object,Object,Object,Object,Object,Object,Object,Object)Object != (Exception,Object,Object,Object,Object,Object,Object,Object,Object,Object[])Object
        at java.lang.invoke.MethodHandleStatics.newIllegalArgumentException(MethodHandleStatics.java:113)
        at java.lang.invoke.MethodHandles.misMatchedTypes(MethodHandles.java:2182)
        at java.lang.invoke.MethodHandles.catchException(MethodHandles.java:2245)
        at MethodHandleBug.main(MethodHandleBug.java:98)


        REPRODUCIBILITY :
        This bug can be reproduced always.

        ---------- BEGIN SOURCE ----------
        import java.lang.invoke.MethodHandle;
        import java.lang.invoke.MethodHandles;
        import java.lang.invoke.MethodType;

        public class MethodHandleBug {

            public static MethodHandle handler;
            public static MethodHandle body8;
            public static MethodHandle prim8;
            public static MethodHandle body9;
            public static MethodHandle prim9;
            
            public static Object handler(Exception e) {
                return null;
            }
            
            public static Object body8(
                    Object a1, Object a2, Object a3, Object a4,
                    Object a5, Object a6, Object a7, Object...a8) {
                return null;
            }
            
            public static Object prim8(
                    Object a1, Object a2, Object a3, Object a4,
                    Object a5, Object a6, Object a7, Object...a8) {
                return null;
            }
            

            public static Object body9(
                    Object a1, Object a2, Object a3, Object a4,
                    Object a5, Object a6, Object a7, Object a8, Object...a9) {
                return null;
            }
            
            public static Object prim9(
                    Object a1, Object a2, Object a3, Object a4,
                    Object a5, Object a6, Object a7, Object a8, Object...a9) {
                return null;
            }
            
            static {
                try {
                    handler = MethodHandles.lookup().findStatic(
                            MethodHandleBug.class, " handler " ,
                            MethodType.methodType(Object.class, Exception.class));
                    prim8 = MethodHandles.lookup().findStatic(
                            MethodHandleBug.class, " prim8 " ,
                            MethodType.methodType(
                                    Object.class, Object.class, Object.class, Object.class,
                                    Object.class, Object.class, Object.class, Object.class,
                                    Object[].class));
                    body8 = MethodHandles.lookup().findStatic(
                            MethodHandleBug.class, " body8 " ,
                            MethodType.methodType(
                                    Object.class, Object.class, Object.class, Object.class,
                                    Object.class, Object.class, Object.class, Object.class,
                                    Object[].class));
                    prim9 = MethodHandles.lookup().findStatic(
                            MethodHandleBug.class, " prim9 " ,
                            MethodType.methodType(
                                    Object.class, Object.class, Object.class, Object.class,
                                    Object.class, Object.class, Object.class, Object.class,
                                    Object.class, Object[].class));
                    body9 = MethodHandles.lookup().findStatic(
                            MethodHandleBug.class, " body9 " ,
                            MethodType.methodType(
                                    Object.class, Object.class, Object.class, Object.class,
                                    Object.class, Object.class, Object.class, Object.class,
                                    Object.class, Object[].class));
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            public static void main(String[] args) {
                System.out.printf( " Java Version is %s.
         " , System.getProperty( " java.version " ));

                System.out.printf( "
        Working case (8 args).

         " );
                System.out.printf( " Handler is a %s.
        Body8 is a %s.
        Prim8 is a %s.
         " , handler, body8, prim8);
                MethodHandle primWithHandler8 = MethodHandles.catchException(
                        prim8, Exception.class, handler);
                System.out.printf( " Prim8 with Handler is a %s.
         " , primWithHandler8);
                MethodHandle bodyWithEXcp8 = MethodHandles.dropArguments(body8, 0, Exception.class);
                System.out.printf( " Body8 with exception is a %s.
         " , bodyWithEXcp8);
                MethodHandle primFallBackToBody8 = MethodHandles.catchException(
                    primWithHandler8, Exception.class, bodyWithEXcp8);
                System.out.printf( " Prim8 with fallback to body8 is a %s.
         " , primFallBackToBody8);
                
                System.out.printf( "
        Failing case (9 args).

         " );
                System.out.printf( " Handler is a %s.
        Body9 is a %s.
        Prim9 is a %s.
         " , handler, body9, prim9);
                MethodHandle primWithHandler9 = MethodHandles.catchException(
                        prim9, Exception.class, handler);
                System.out.printf( " Prim9 with Handler is a %s.
         " , primWithHandler9);
                MethodHandle bodyWithEXcp9 = MethodHandles.dropArguments(
                    body9, 0, Exception.class);
                System.out.printf( " Body9 with exception is a %s.
         " , bodyWithEXcp9);
                MethodHandle primFallBackToBody9 = MethodHandles.catchException(
                    primWithHandler9, Exception.class, bodyWithEXcp9);
                System.out.printf( " Prim9 with fallback to body9 is a %s.
         " , primFallBackToBody9);
            }
        }

        ---------- END SOURCE ----------

        CUSTOMER SUBMITTED WORKAROUND :
        We have changed our source to work round this problem by gathering more args as varargs, but the same problem could crop up in other areas we have not yet tested.

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                • Assignee:
                  twisti Christian Thalinger
                  Reporter:
                  webbuggrp Webbug Group
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                  • Created:
                    Updated:
                    Resolved: