From: Francis Deslauriers <francis.deslauriers@efficios.com>
Date: Fri, 17 Jan 2020 17:45:51 +0000 (-0500)
Subject: Fix: lttng: placing probe on symbol starting with `_`
X-Git-Tag: v2.10.10~3
X-Git-Url: http://git.liburcu.org/?a=commitdiff_plain;h=aeb5443d0a475ef70fdaf3ceaa8f764f734453cd;hp=aeb5443d0a475ef70fdaf3ceaa8f764f734453cd;p=lttng-tools.git

Fix: lttng: placing probe on symbol starting with `_`

Issue
=====
The lttng CLI tool does not parse `--probe` symbol name properly if the
name has an underscore at the beginning.
For example, the following command fails
  lttng enable-event -k --probe _do_fork my_do_fork_event

This happens because the `parse_probe_opts()` function looks if the
first character of the symbol field is an alphabetic character to
determine if a symbol was provided. The problem is that some kernel
symbols such as `_do_fork` start with an underscore.

Solution
========
check if the first character is an alphabetic character OR an
underscore.

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Change-Id: I3ee6c26641ceee508ee78e895d372c6b09fe90fb
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---