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stapvars

NAME

stapvars - systemtap variables

DESCRIPTION

The following sections enumerate the public variables provided by standard tapsets installed under /usr/share/systemtap/tapset. Each variable is described with a type, and its behavior/restrictions. The syntax is the same as printed with the stap option -p2. Examples:

example1:long

Variable "example1" contains an integer.

example2:string [long]

Variable "example2" is an array of strings, indexed by integers.

ARGV

argc:long

Contains the value of the $# value: the number of command line arguments passed to the systemtap script. It is initialized with an implicit begin(-1) probe.

argv:string [long]

Contains each command line argument as a string. argv[1] will equal @1 if there was at least one command line argument. Arguments beyond #32 are not transcribed, and produce a warning message within the begin(-1) probe that initializes this array.

NULL

NULL:long

Simply defined as the number 0.

FILES

/usr/share/systemtap/tapset

SEE ALSO

stap(1)