Summary:
Add a path condition to each symbolic state, represented in sledge's arithmetic domain. This gives a precise account of arithmetic constraints. In particular, it is relation and thus is more robust in the face of inter-procedural analysis.
This is gated behind a flag for now as there are performance issues with the new arithmetic.
Reviewed By: jberdine
Differential Revision: D20393947
fbshipit-source-id: b780de22a
Summary:
The "interface" modules define short forms for the internals of pulse
and also serve as a guide of which modules you are supposed to use at
which "level" in the pulse domains (base domain vs abductive domain vs
higher-level PulseOperations.ml). Make sure they are used.
Reviewed By: skcho
Differential Revision: D21022927
fbshipit-source-id: f890df245
Summary: In preparation for PulseArithmetic to be something else.
Reviewed By: ezgicicek
Differential Revision: D20393928
fbshipit-source-id: d93131e12
Summary:
This does several things because it was hard to split it more:
1. Split most of the arithmetic reasoning to PulseArithmetic.ml. This
doesn't need to be reviewed thoroughly because an upcoming diff
changes the domain from just `EqualTo of Const.t` to an interval domain!
2. When going through a prune node intra-procedurally, abduce arithmetic
facts to the pre (instead of just propagating them). This is the "assume
as assert" trick used by biabduction 1.0 too and allows to propagate
arithmetic constraints to callers.
3. Use 2 when applying summaries by pruning specs whose preconditions
have un-satisfiable arithmetic constraints.
This changes one of the tests! Pulse now does a bit more work to find
the false positive, as can be seen in the longer trace.
Reviewed By: skcho
Differential Revision: D18117160
fbshipit-source-id: af3b2c8c0
Summary:
See explanations in D17955104.
This renames `AbstractAddress` to `AbstractValue` since they are not
necessarily addresses.
Reviewed By: ezgicicek
Differential Revision: D17955290
fbshipit-source-id: 8bb4c61f2
Summary:
See explanations in D17955104. I put Attributes inside PulseAttribute
instead of creating a new file to avoid exposing more internals about
ranks.
Reviewed By: ezgicicek
Differential Revision: D17955284
fbshipit-source-id: a8719a58f
Summary:
Problem: PulseDomain.ml is pretty big, and contains lots of small
modules. The Infer build being a bit monolithic at the moment, it is
hard to split all these small modules off without creating some
confusion about which abstraction barries lay where. For instance, it's
fine to use `PulseDomain.ValueHistory` anywhere, but using `PulseDomain`
itself is sometimes bad when one should use `PulseAbductiveDomain`
instead.
Proposal: a poorman's library mechanism based on module aliasing. This
stack of diffs creates new Pulse* modules for all these small, safe to
use modules, together with `PulseBasicInterface.ml`, which aliases these
modules to remove the `Pulse` prefix. At the end of the stack, it will
contain:
```
module AbstractValue = PulseAbstractValue
module Attribute = PulseAttribute
module Attributes = PulseAttribute.Attributes
module CallEvent = PulseCallEvent
module Diagnostic = PulseDiagnostic
module Invalidation = PulseInvalidation
module Trace = PulseTrace
module ValueHistory = PulseValueHistory
```
This "interface" module can be opened in other pulse modules freely.
Reviewed By: ezgicicek
Differential Revision: D17955104
fbshipit-source-id: 13d3aa2b5
Jules Villard