Accessing Main Storage: CORE › Display Main Storage › Indirect Addressing › Examples

Examples

The following examples show how to use the at sign.

• Suppose INPUT‑RECD‑ADDR is the name of the BLL cell used to contain the address of an input record. To display the input record when the COBOL program stops at a breakpoint, enter:

  CORE='INPUT‑RECD‑ADDR'@0
  

  This command has the same effect as:

  CORE='INPUT‑RECORD'
  

  INPUT‑RECORD

  Indicates the data structure addressed by the BLL cell named INPUT‑RECD‑ADDR.

• To display the first storage area on the task storage chain, enter:

  CORE=STCA@4
  

  STCA

  Indicates CORE keyword for the System Task Control Area. CORE displays the storage area whose address is stored in the low‑order three bytes of the fullword at STCA+4. The result is that CORE displays the first storage area on the task storage chain, which is stored at STCA+4. Pressing Enter repeats the CORE command, letting you run through the entire chain.

View Storage for a COBOL or PL/I Program at a Breakpoint

Use names defined in a COBOL or PL/I program in CORE commands as follows:

• A COBOL data name, paragraph name, or PL/I symbol name must be in single quotes; qualify, index, or subscript a COBOL data name
• A number sign (#) must directly precede a statement number

Notes:

• If the same data name, such as CUSNAME, is defined more than once in a COBOL or PL/I program, reference particular occurrences using the qualified data name.
• CORE displays as many bytes as are defined by a symbolic name unless the name is modified by a displacement.

Example

To get a full CORE display (272 bytes of storage) beginning with the data location called CUSNAME, enter the command CORE='CUSNAME'+0, not just CORE='CUSNAME'.

• If you have a data name defined in arrays, specify it like this:

  CORE='NAME‑1(X1, X2, X3)'