critical impact:

sbrk - different parameter type (CrCh9)

Problem description

The incr parameter used by the sbrk function on Tru64 UNIX is incompatible with the parameter on HP-UX.

On Tru64 UNIX, the sbrk function prototype is as follows:

void *  sbrk(intptr_t)

The intptr_t data type is defined as long on Tru64 UNIX.

On HP-UX, the sbrk function prototype is as follows:

void *  sbrk(int)

HP-UX allows an application to specify a value of +/-2 gigabytes to the sbrk function, while Tru64 UNIX allows a value larger than that.Therefore, applications that do not need to change data segment allocation by more than 2 gigabytes should see no difference with the sbrk function on HP-UX.

Identifiers

sbrk

See also

• Background information on kernel impacts
• brk(2)

Solution description

Review the applicable manpages and code to determine if unexpected behavior will result.

See also

• brk(2)

Problem summary