From: Michael Jeanson <mjeanson@efficios.com>
Date: Fri, 2 Mar 2018 22:36:25 +0000 (-0500)
Subject: Fix: reset cached vpid context on fork
X-Git-Tag: v2.10.2~7
X-Git-Url: http://git.lttng.org/?p=lttng-ust.git;a=commitdiff_plain;h=f575e0495b7f1f0305dc6fa48d4a96b9f4cc906e

Fix: reset cached vpid context on fork

We currently reset the cached vtid on fork but not the vpid. This is not
a problem on Linux because we don't cache the vpid internally but call
getpid() directly and rely on the glibc pid cache.

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

diff --git a/liblttng-ust/lttng-ust-comm.c b/liblttng-ust/lttng-ust-comm.c
index 0cf5ecd9..d98fae40 100644
--- a/liblttng-ust/lttng-ust-comm.c
+++ b/liblttng-ust/lttng-ust-comm.c
@@ -1986,6 +1986,7 @@ void ust_after_fork_child(sigset_t *restore_sigset)
 {
 	if (URCU_TLS(lttng_ust_nest_count))
 		return;
+	lttng_context_vpid_reset();
 	lttng_context_vtid_reset();
 	DBG("process %d", getpid());
 	/* Release urcu mutexes */