The Alignment Fault Utility (FLT) finds alignment faults and
    records them in a ring buffer, which can be sized when starting
    alignment fault tracing. The summary screen displays the results
    sorted by the program counter (PC) that has incurred the most
    alignment faults. The detailed trace output also shows the
    process identification (PID) of the process that caused the
    alignment fault, with the virtual address that triggered the
    fault.

    Output can be directed to a file using the SDA SET OUTPUT
    command.

    When entered by itself with no command keyword, the FLT command
    lists the FLT command options.

         SDA> FLT

    You can get full help on FLT by entering HELP FLT at the SDA>
    prompt.

    FLT can be started and stopped as required without the need for a
    system reboot.

1  –  LOAD

    Loads the FLT$DEBUG execlet. Do this before starting alignment
    fault tracing.

    Format

      FLT LOAD

2  –  SHOW

2.1  –  TRACE

    Displays detail about the trace.

    Format

      FLT SHOW TRACE  [/SUMMARY]

2.1.1  –  Qualifier

2.1.1.1    /SUMMARY

    Displays the results sorted by the program counter (PC) that has
    incurred the most alignment faults.

3  –  START

3.1  –  TRACE

    Starts alignment fault tracing. By default, all PCs are traced.

    Format

      START TRACE  [/BUFFER=pages] [/BEGIN=pc_range_low]

                   [/CALLER] [/END=pc_range_high]

                   [/INDEX=pid] [MODE=(mode,...)]

3.1.1  –  Qualifiers

3.1.1.1    /BUFFER

       /BUFFER=pages

    The number of pages to size the trace buffer. The default is 128
    pages or 1MB.

3.1.1.2    /BEGIN

       /BEGIN=pc_range_low

    Start of range of PCs to trace.

3.1.1.3    /CALLER

    For each alignment fault, in addition to recording the PC that
    incurred the fault, FLT also records the PCs of the caller, the
    callers caller, and so on, for up to 10 call frames.

3.1.1.4    /END

       /END=pc_range_high

    End of range of PCs to trace.

3.1.1.5    /INDEX

       /INDEX=pid

    Only trace alignment faults for the specified process. You can
    specify the process index itself, or the process identification
    or extended process identification, from which the process index
    is extracted.

3.1.1.6    /MODE

       /MODE=(mode,...)

    Only trace alignment faults that occur in the specified modes.
    Allowed modes are KERNEL, EXEC, SUPER and USER. If you specify
    only one mode, you can omit the parentheses.

4  –  STOP

4.1  –  TRACE

    Stops tracing.

    Format

      FLT STOP TRACE

5  –  UNLOAD

    Unloads the FLT$DEBUG execlet.

    Format

      FLT UNLOAD