stapvars5
Systemtap variables
Overview
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