Programming Interface Information: The Monitor Records are intended Programming Interfaces that allow the customer to write programs to obtain services of z/VM.

#### MRSTOASC

Prolog
Control Block Contents
Cross Reference

#### MRSTOASC Prolog

     DSECT NAME - STOASC
     FUNCTION - This is an event record that is created when
                an address space is created.
     LOCATED BY -
            Through the Monitor Control Area
     REFERENCED CONTROL BLOCKS -
            MRRECHDR    Monitor Record Header
     NAME - MRSTOASC
     DESCRIPTIVE NAME - Monitor Event Record
                        Domain 3  - Storage Domain
                        Record 12 - Address Space Created
     DESCRIPTION - Generated when an address space is created.

#### MRSTOASC Control Block Contents

    Offsets
    Dec  Hex  Type        Len  Name (Dim)             Description

       0   0  Structure    64  STOASC                 Start of monitor record
       0   0  Character     0  STOASC_MRHDR           Record header. See MRRECHDR
                                                      for details.
       0   0  Character    20  MRHDR
       0   0  Unsigned      2  MRHDRLEN
       2   2  Unsigned      2  MRHDRZER
       4   4  Unsigned      1  MRHDRDM
       5   5  Unsigned      1  *
       6   6  Unsigned      2  MRHDRRC
       8   8  Character     8  MRHDRTOD
      16  10  Character     4  *
      20  14  Character     0  MRHDR_END
      20  14  Character     8  STOASC_ASCUSRID        Owning userid, padded on
                                                      the right with blanks.
      28  1C  Character    24  STOASC_ASCNAME         Address space name, padded
                                                      on the right with blanks.
      52  34  Signed        4  STOASC_ASCSSIZE        Size of address space, in
                                                      bytes. This field is kept for
                                                      compatability reasons, but
                                                      may not be accurate for
                                                      z/Arch systems where larger
                                                      address spaces are valid. The
                                                      preferred field is
                                                      STOASC_ASCDEFSZ.
      56  38  Character     8  STOASC_ASCDEFSZ        Defined address space size
                                                      in addressable bytes, minus
                                                      one. The minus one notation
                                                      is used so that a total size
                                                      of 16 Exabytes may be
                                                      represented without ambiguity
                                                      (as x'FFFFFFFF_FFFFFFFF').
      56  38  Character     4  STOASC_CALDEFHI        high four bytes
      60  3C  Character     4  STOASC_CALDEFLO        low four bytes
      64  40  Character     0  STOASC_END

#### MRSTOASC Cross Reference

                          Hex           Hex
    Name                  Offset Length Value

    MRHDR                      0     20
    MRHDR_END                 14      0
    MRHDRDM                    4      1
    MRHDRLEN                   0      2
    MRHDRRC                    6      2
    MRHDRTOD                   8      8
    MRHDRZER                   2      2
    STOASC                     0     64
    STOASC_ASCDEFSZ           38      8
    STOASC_ASCNAME            1C     24
    STOASC_ASCSSIZE           34      4
    STOASC_ASCUSRID           14      8
    STOASC_CALDEFHI           38      4
    STOASC_CALDEFLO           3C      4
    STOASC_END                40      0
    STOASC_MRHDR               0      0

    This information is
    based on z/VM V7R2.0.

    Last updated on 08 August 2020 at 21:28:34.

    Copyright IBM Corporation, 1990, 2020