z/VM: CP Commands and Utilities Reference - z/VM - IBM

TRSOURCE ID (Definition Operands)
Examples
1692 z/VM: CP Commands and Utilities Reference
12. To trace data located in the absolute page zero, reverse prefixing must be
used. When the value of the prefix register is added to the datalink string,
values are obtained from absolute page zero. On the other hand, if the
address calculated from a data link is less than hexadecimal 1000, the value
recorded is obtained from the prefix page of the processor in which the data
trace event occurs.
13. If a traceid contains conditional statements (at least one IF statement) and the
condition when the trace point is encountered results in the execution of no
datalinks, then no trace record is made, not even a trace record containing
only header information. It is as though the trace event never occurred.
14. It is possible to specify lower case characters in a character constant
definitions. This cannot be done by typing a CP command because all
characters in the command are converted to upper case before the
TRSOURCE command parser receives the command. To specify lower case,
use the Diagnose X'08' interface from an EXEC or from an assembler
program. Only the character constant should be specified in lower case. The
following is an example of an EXEC that defines a character constant that
contains lower case characters and single quotes.
/* */
cpcmd="TRSOURCE ID TT TYPE DATA IF G3.20 EQ C’Specify ’’vdev’’’ "
response = ’’
parse value Diag(’8’,cpcmd) with response ’15’x
if response ¬= ’’ then say ’response=’response
Examples of Data Link Usage: The following examples are based on the status of
the registers and the storage pictured below.
Registers Main Storage
+--------+ 4000 00005008 00000000 0000A000 00000000
G1 |00001000|
+--------+ 5000 0000A004 00001144 00005555 00000000
6000 00000000 00000000 0000A000 00000000
+--------+
G4 |00004000| ...
+--------+
A000 0000B000 0000C000 0000D000 0000E000
+--------+ B000 C4C1E3C3 E3D9C1D7 11110000 00000000
G5 |00005000|
+--------+ C000 C4C1E3C3 E3D9C1D7 FFFF0000 00000000
D000 DDDDDDDD 00000000 00000000 00000000
+---------
G6 |00006000|
+---------