6d4dfeb913
This change became necessary as we observed weird fail-client SIGSEGV crashes with both Bochs and Gem5 backends and different experiments. Some Fail* components are instantiated statically: the SimulatorController instance "simulator", containing the ListenerManager and the CoroutineManager, and the active ExperimentFlow subclass(es) (experiments/instantiate-experiment*.ah.in). The experiment(s) is registered as an active flow in the CoroutineManager at startup. As plugins (which are ExperimentFlows themselves) are often created on an experiment's stack, ExperimentFlows deregister themselves on destruction (e.g., when leaving the plugin variable's scope). The core problem is, that the creation and destruction order of statically instantiated objects depends on the link order; if the experiment is destroyed after the CoroutineManager, its automatic self-deregistering feature talks to the smoking ruins of the latter. This change removes all static instantiations of ExperimentFlow and replaces them with constructions on the heap. Additionally it makes sure that the CoroutineManager recognizes that a shutdown is in progress, and refrains from touching potentially already destroyed data structures when a (mistakenly globally instantiated) ExperimentFlow deregisters in this case. Change-Id: I8a7d42fb141222cd2cce6040ab1a01f9de61be24
This is an import of the old danceos svn repository. The Fail* development started with rev 187, but this git import only contains revisions 956 and newer due to directory structure changes. Imported from external gitsvn checkout. http://www.kernel.org/pub/software/scm/git/docs/howto/using-merge-subtree.html