From e99158dd85fe789ea5e1a40c29f196fa6c715bcf Mon Sep 17 00:00:00 2001
From: Millian Poquet <millian.poquet@inria.fr>
Date: Tue, 9 Feb 2016 16:30:16 +0100
Subject: [PATCH] Energy, onHostDestruction: ensured ptr existence

Our simulator crashed after the main termination,
which was caused by the Simgrid energy plugin
calling host_energy->update() whereas host_energy
was null.

This commit simply adds a test about host_energy
being null or not before using it in function
onHostDestruction of src/surf/plugins/energy.cpp.
---
 src/surf/plugins/energy.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/surf/plugins/energy.cpp b/src/surf/plugins/energy.cpp
index 02ffe37163..2035bb50e8 100644
--- a/src/surf/plugins/energy.cpp
+++ b/src/surf/plugins/energy.cpp
@@ -235,9 +235,12 @@ static void onHostDestruction(simgrid::s4u::Host& host) {
   if (dynamic_cast<simgrid::surf::VirtualMachine*>(surf_host))
     return;
   HostEnergy *host_energy = host.extension<HostEnergy>();
-  host_energy->update();
-  XBT_INFO("Total energy of host %s: %f Joules",
-    host.name().c_str(), host_energy->getConsumedEnergy());
+  if (host_energy != nullptr)
+  {
+    host_energy->update();
+    XBT_INFO("Total energy of host %s: %f Joules",
+             host.name().c_str(), host_energy->getConsumedEnergy());
+  }
 }
 
 /* **************************** Public interface *************************** */
-- 
2.20.1