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base: gracefully handle invalid env session routes

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This patch addresses the corner cases where an environment session
could not be routed, i.e., if an environment LOG log session is
routed to a non-existing child.
This commit is contained in:
Norman Feske 2017-03-03 12:45:03 +01:00 committed by Christian Helmuth
parent 8d4fb288d9
commit 0202048eb6
1 changed files with 16 additions and 10 deletions
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26
repos/base/include/base/child.h
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@ -516,22 +516,28 @@ class Genode::Child : protected Rpc_object<Parent>,
if (_connection.constructed())
return;
Child_policy::Route const route =
_child._resolve_session_request(_child._policy,
_service_name(),
_args.string());
_env_service.construct(_child, route.service);
_connection.construct(*_env_service, _child._id_space, _client_id,
_args, _child._policy.filter_session_affinity(Affinity()),
route.label);
try {
Child_policy::Route const route =
_child._resolve_session_request(_child._policy,
_service_name(),
_args.string());
_env_service.construct(_child, route.service);
_connection.construct(*_env_service, _child._id_space, _client_id,
_args, _child._policy.filter_session_affinity(Affinity()),
route.label);
}
catch (Parent::Service_denied) {
error(_child._policy.name(), ": ", _service_name(), " "
"environment session denied"); }
}
typedef typename CONNECTION::Session_type SESSION;
SESSION &session() { return _connection->session(); }
Capability<SESSION> cap() const { return _connection->cap(); }
Capability<SESSION> cap() const {
return _connection.constructed() ? _connection->cap()
: Capability<SESSION>(); }
};
Env_connection<Ram_connection> _ram { *this, Env::ram(), _policy.name() };