Page of GC20-1806-9 As Updated April 1, 1981 by TNL GN25-0834 SYSTEM ABEND Conditions can occur the CP program that may force an abnormal
ending condition (ABEND) and cause the dumping of system registers and
storaqe. The device that receives these records can be a tape, printer,
or disk device.
A system restart dump is taken when the system operator presses the SYSTEM RESTART button on the processor console or initiates system
restart in some other manner as dictated by the processor device type.
In an AP configuration, the attached processor should not be stopped
before the system restart is initiated.
Dumping operations are caused by any program interruptions or system
restart condition. These interruptions cause routines to gather data
from registers and storage and place this data on a previously defined
device. The system CP command SET DUMP defines the quantity of data to
be dumped.
For example: SET DUMP AUTO SET DUMP raddr SET DUMP raddr ALL SET DUMP AUTO ALL SET DUMP AUTO places the VM/370 system dump on a preselected file
device. (The disk dump area is antOlllatically selected at system
initialization time if sufficient contiguous space is available.) You can verify the device type and address by entering the QUERY DUMP command. Use SET DUMP raddr when the dump device is to be a high speed printer
or tape device. The real hexadecimal one to three digit device address
is substituted for the raddr operand.
The ALL operand used with SET DUMP AUTO or SET DUMP raddr dumps all
of storage onto to the DUMP device. If the ALL operand is not
specified, the system defaults to dumping only those areas that pertain
to CP, and not those areas that pertain to virtual machine operations.
If you dump to a disk file, an additional operation is necessary to
transform these records into readable output for programmers or system
analysts. You can do this with the CMS VMFDUMP program.
Note that expanded function is available to the VMFDUMP command as
generated for the IPCS virtual machine. For more information on this,
refer to the VM/370 Interactive Problem Control System If the records are dumped onto a tape drive, other CMS command
options must be invoked for printout. Only abend dumps that are a result of using the SET DUMP AUTO command
are spooled as a special virtual card reader file. This card reader
file is assigned during system generation to a specific virtual machine
user via the SYSOPR macro. The CMS VMFDUMP command formats and prints
these CP abend dumps.
36 VM/370 Operator's Guide
Page of GC20-1806-9 As Updated April 1, 1981 by TNL GN25-0834 The VMFDUKP command creates a CMS file from the CP disk dump data and
prints the dump from the CMS file.
The VM/Interactive problem Control System Extension (VM/IPCS Extension) provides installations with expanded facilities for reporting
and diagnosing software failure. The VMDUMP command allows the user to
dump a virtual machine's entire storage area. The VK/IPCS Extension
program product or a user written program must process the VMDUMP command. If you have installed this program, see the VK/Interactive­ System Extension User's Quide and Order No. SC34-2020. Section 2. Initiating VM/370 Operation 36.1
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