Handle crashes via signal handlers. Switch python's revng.api from
a normal python function to faulthandler, which works also in the
case of harsher interruptions (e.g. SIGABRT).
A step's artifacts now include singleTargetFilename, which gives a
suggested filename to use when a single element is extracted from the
underlying container.
`recalculateAllPossibleTarget` is now a private member of
PipelineManager This was done since all calls that can trigger a change
in the target list have been isolated and the call is done implicitly.
This removes rp_manager_recompute_all_available_targets from PipelineC,
since it was added as a stopgap until the above was implemented.
This commit introduces some changes to how the revng pipeline handles
serializing to disk. Specificaly:
* Pipeline globals (specifically model.yml) are better handled if they
are in a subdirectory. They are now saved in the "context"
subdirectory.
* In python:revng.api the pipeline is serialized whenever there is a
non-reproducible change to the state (e.g. binary upload or model
change).
In the case of analyses this is done conservatively by checking that
the diff produced is not empty.
* The logic for computing a step's subdirectory has been moved to the
pipeline runner, consequently if a step is asked to serialize it
will not create any subdirectories.
* Functionality for saving a single step/context has been exposed in
Pipeline C.
* Finally, all path concatenations are now handled by
llvm::sys::path::append, for extra os-agnosticism.
This commit adds the newly implemented functionality in PipelineC both
in revng.api and the graphql api, allowing:
* retrieval of global variable names
* unwrapping of a single target
* execution of analyses
Add a new key to a Step, named Artifacts. If present, it indicates that
the step has a "default" Kind and Container that can be easily retrieved
without explicitly specifying either when producing an artifact.
Add additional field MIMEType to Container.
This allows API consumers to know at runtime how to treat the data
within a container without any prior knowledge.
Adds missing API functions to PipelineC that will be needed by the
GraphQL API:
* Kinds enumeration
* Get Rank and parent of a Kind
* Enumerate and inspect Ranks
* Get a Step's parent
Included are some docstring fixes
'PathComponents` was copied on the stack by the assignment and then a
pointer to it is returned by `c_str`, leading to a use-after-free since
it is freed when going out of scope
Alessandro Di Federico