---
name: "function::log"
section: "3stap"
platform: "linux"
package: "systemtap-doc"
version: "5.1-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/function::log"
---

# function::log(3stap)

Send a line to the common trace buffer

## NAME

function::log - Send a line to the common trace buffer

## SYNOPSIS

```
    log(msg:string)
```

## ARGUMENTS

*msg*

The formatted message string

## DESCRIPTION

This function logs data. log sends the message immediately to staprun and to the bulk transport (relayfs) if it is being used. If the last character given is not a newline, then one is added. This function is not as efficient as printf and should be used only for urgent messages.

## SEE ALSO0

[*tapset::logging*(3stap)](/tapset::logging/3stap.md)