From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 27 Sep 2018 19:21:16 +0000 (-0400)
Subject: Fix: check for event class/instance prototype mismatch
X-Git-Tag: v2.12.0-rc1~71
X-Git-Url: https://git.lttng.org/?a=commitdiff_plain;h=c75c0422c64f33c0102e1778cecc812c58b700e5;hp=c75c0422c64f33c0102e1778cecc812c58b700e5;p=lttng-ust.git

Fix: check for event class/instance prototype mismatch

The TP_ARGS() for an event instance belonging to an event class
must have compatible types with the event class TP_ARGS().

Failure to follow this rule leads to a prototype mismatch between the
tracepoint call site and the probe function. A common effect perceived
is that events with prototype mismatch between call site and probe
function are never traced.

Fix this by enforcing a compile-time check of the event instance and
class prototypes, similarly to what is done in LTTng modules.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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