From: Philippe Waroquiers <philippe.waroquiers@skynet.be>
Date: Sun, 29 Jul 2018 19:21:07 +0000 (+0200)
Subject: Fix uninitialised epoch when recording execontext.
X-Git-Tag: VALGRIND_3_14_0~73
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f772902b65f4f9d48324b3093c438c25feaa6675;p=thirdparty%2Fvalgrind.git

Fix uninitialised epoch when recording execontext.

A fresh execontext must have a DiEpoch_INVALID()
but the epoch was left uninitialised.

This was detected by self-hosting valgrind.
---

diff --git a/coregrind/m_execontext.c b/coregrind/m_execontext.c
index 50ec9f4ee5..c5c8599069 100644
--- a/coregrind/m_execontext.c
+++ b/coregrind/m_execontext.c
@@ -537,6 +537,7 @@ static ExeContext* record_ExeContext_wrk2 ( const Addr* ips, UInt n_ips )
 
    new_ec->n_ips = n_ips;
    new_ec->chain = ec_htab[hash];
+   new_ec->epoch = DiEpoch_INVALID();
    ec_htab[hash] = new_ec;
 
    /* Resize the hash table, maybe? */