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  1. JDK
  2. JDK-4953651

JVM accepts class v49:0 with low = 0x80000000 for tableswitch

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    • Subcomponent:
    • Resolved In Build:
      b31
    • CPU:
      generic
    • OS:
      generic

      Description



      Name: viR10068 Date: 11/13/2003


      The JVM (1.5.0-beta-b28) accepts class v49:0 with
      low = 0x80000000 for tableswitch instruction.
      Note, the JVM rejects this class file if CF version < 49:0.

      The new JCK tests are failed due to this error:
      # vm/instr/tableswitch/tableswitch003/tableswitch00310m1t/tableswitch00310m1t.html

      The test source:
      --------------------- test12_49.jasm ---------------------------
      public class test12_49 version 49:0 {

      public static Method run:"([Ljava/lang/String;Ljava/io/PrintStream;)I"
      stack 3 locals 2
      {
      iconst_0;
      bytecode 170; // tableswitch
      nop; nop; // padding
      bytecode 0,0,0,19; // default target == L16
      bytecode 0x80,0x00,0x00,0x00;
      bytecode 0,0,0,0;
      bytecode 0,0,0,19;
         L16: locals_map class "[Ljava/lang/String;", class java/io/PrintStream;
      iconst_0;
      ireturn;
      }
      }
      --------------------- test12_45.jasm ---------------------------
      public class test12_45 version 45:3 {

      public static Method run:"([Ljava/lang/String;Ljava/io/PrintStream;)I"
      stack 3 locals 2
      {
      iconst_0;
      bytecode 170; // tableswitch
      nop; nop; // padding
      bytecode 0,0,0,19; // default target == L16
      bytecode 0x80,0x00,0x00,0x00;
      bytecode 0,0,0,0;
      bytecode 0,0,0,19;
         L16: locals_map class "[Ljava/lang/String;", class java/io/PrintStream;
      iconst_0;
      ireturn;
      }
      }
      ----------------------------------------------------------------
      The execution log:
      % jdk1.5.0-b28/solaris-sparc/bin/java -showversion -Xfuture test12_49
      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
      % jdk1.5.0-b28/solaris-sparc/bin/java -showversion -Xfuture test12_45
      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.VerifyError: (class: test12_45, method: run
      signature: ([Ljava/lang/String;Ljava/io/PrintStream;)I) Illegal instruction found at
      offset 1
      %


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

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            • Assignee:
              myangsunw Mingyao Yang (Inactive)
              Reporter:
              vivsunw Viv Viv (Inactive)
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