INITCHECK option to have the compiler
check for uninitialized data items and issue warning messages when
they are used without being initialized.
- The compiler will not issue any warning messages for uninitialized data items.
- The compiler will check for uninitialized data items and issue a warning message when a data item is used without being initialized. However, if a data item is initialized on at least one logical path to a statement, no warning message will be issued.
- The compiler will still check for uninitialized data items and
issue a warning message when a data item is used without being initialized.
INITCHECK=STRICTwill issue a warning message about uninitialized data for a data item used in a statement unless the data item is initialized on all logical paths to the statement.Here is a sample program to illustrate the behavior differences between specifying
INITCHECK=STRICT. Y and Z represent some data items, with no value clauses:
Z is initialized on one path to the
PROCEDURE DIVISION. IF Y > 5 MOVE 2 TO Z END-IF DISPLAY Z
DISPLAYstatement but not the other, so if
INITCHECK=LAXis in effect, a warning message will be issued for Y only, while
INITCHECK=STRICTwill also issue a warning message for Z.
INITCHECKoption analyzes data items in the
LOCAL-STORAGE SECTIONonly. In particular, it does not analyze data items in the
INITCHECKanalysis does not track external or global data items.
INITCHECKanalysis does not track individual elements in tables independently. Instead, if one element of a table is initialized, all corresponding elements of the table are considered to be initialized. This applies to both fixed-length and variable-length tables.
INITCHECKanalysis does not track the initialization of items if it happens through a pointer. For example, if a pointer to an uninitialized data item is created by using
ADDRESS-OF, and that data item is initialized through that pointer, the
INITCHECKanalysis might also issue a warning message.
- For uninitialized data items being passed
BY REFERENCE, no warning messages will be issued. However, the
INITCHECKanalysis will warn about uninitialized data items being passed
- If a data item is in a group with other items that have had their address taken, for example, as the result of being an SQL host variable, then that data item will also be considered to have its address taken, and the set of all address taken data items is always considered to be set by any call to an external function.
- All of the
INITCHECKanalyses occur at compile time only.
INITCHECKoption has no effect on the behavior or performance of the program after it has been compiled.
- Use of the
INITCHECKoption might increase compile time and memory consumption.
INITCHECKis more accurate when used with
OPT=2, but it is also helpful when used with