psmshell - Online in the Cloud

PROGRAM:

NAME

psmshell - PSM memory management test shell

SYNOPSIS

psmshell partition_size

DESCRIPTION

psmshell allocates a region of partition_size bytes of system memory, places it under PSM
management, and offers the user an interactive "shell" for testing various PSM management
functions.

psmshell prints a prompt string (": ") to stdout, accepts a command from stdin, executes
the command (possibly printing a diagnostic message), then prints another prompt string
and so on.

The locations of objects allocated from the PSM-managed region of memory are referred to
as "cells" in psmshell operations. That is, when an object is to be allocated, a cell
number in the range 0-99 must be specified as the notional "handle" for that object, for
use in future commands.

The following commands are supported:

h The help command. Causes psmshell to print a summary of available commands. Same
effect as the ? command.

? Another help command. Causes psmshell to print a summary of available commands. Same
effect as the h command.

m cell_nbr size
The malloc command. Allocates a large-pool object of the indicated size and
associates that object with cell_nbr.

z cell_nbr size
The zalloc command. Allocates a small-pool object of the indicated size and
associates that object with cell_nbr.

p cell_nbr
The print command. Prints the address (i.e., the offset within the managed block of
memory) of the object associated with cell_nbr.

f cell_nbr
The free command. Frees the object associated with cell_nbr, returning the space
formerly occupied by that object to the appropriate free block list.

u The usage command. Prints a partition usage report, as per psm_report(3).

q The quit command. Frees the allocated system memory in the managed block and
terminates psmshell.

EXIT STATUS

"0" psmshell has terminated.

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