From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Sun, 27 Dec 2020 19:48:46 +0000 (-0500)
Subject: Fix: Use default visibility for tracepoint provider symbol
X-Git-Tag: v2.12.1~1
X-Git-Url: http://git.lttng.org./?a=commitdiff_plain;h=d5ed6eddf99f8afcac6b2cb217b6678431b64968;hp=d5ed6eddf99f8afcac6b2cb217b6678431b64968;p=lttng-ust.git

Fix: Use default visibility for tracepoint provider symbol

When building a probe provider `someprobe` with -fvisibility=hidden into
a shared library, the `__tracepoint_provider_someprobe` symbol is hidden,
which does not allow tracepoint instrumentation to link to it.

Fix this by using the "default" visibility attribute.

For a shared library built with -fvisibility=hidden, this changes the
output of nm for that symbol from:

000000000000417c b __tracepoint_provider_someprobe

(local BSS symbol)

to

000000000000417c B __tracepoint_provider_someprobe

(global (external) BSS symbol)

Fixes: #1296
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I308374f6cac58cca86e8eb19c872286a3da21a75
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