Summary:
The `(t, unit) result` type is no more informative than `t option` and
less convenient.
Reviewed By: bennostein
Differential Revision: D17665244
fbshipit-source-id: fa969d8b7
Summary:
This puts the mediation between Exp and Term together in Sh_domain
rather than being spread across the two.
Reviewed By: bennostein
Differential Revision: D17665235
fbshipit-source-id: edf277d45
Summary:
The move instruction takes a vector of assignments to perform in
parallel, so generalize exec_move from one to a vector.
Reviewed By: bennostein
Differential Revision: D17665248
fbshipit-source-id: 52aae5ff9
Summary:
[androidx.collection.SimpleArrayMap](https://developer.android.com/reference/androidx/collection/SimpleArrayMap.html) also has `keySet` and `entrySet` methods which make them eligible for inefficient keyset checker. Let's add it.
Title
Reviewed By: skcho
Differential Revision: D17831594
fbshipit-source-id: 32e831e18
Summary:
Starvation analysis keeps a trace documenting why a method is seen as on the UI thread (many reasons possible, often confusing). This was a call-stack plus string, for keeping the explanation of why the last callee is on the UI thread. This is bad, because it takes too much memory/storage (each string is custom-made to the classes/method involved), and is effectively untyped.
Switch to a proper type for explaining this, so the cost is just a few pointers plus shared procnames/types, and then convert to string only when reporting. This will also allow to push the UI trace inside each element of the starvation domain, so as to allow path sensitivity etc, without blowing up summary size.
Reviewed By: ezgicicek, artempyanykh
Differential Revision: D17810007
fbshipit-source-id: cdd743975
Summary:
Extend the encoding using `id` from 0 indicating a program variable to
also -1 indicating a global program variable.
Reviewed By: bennostein
Differential Revision: D17665229
fbshipit-source-id: 848b8a31e
Summary:
The sorting of heap blocks when printing formulas was broken by the
change to the direct representation of polynomials.
Reviewed By: bennostein
Differential Revision: D17665246
fbshipit-source-id: 4ebea9f20
Summary:
This diff proceeds work for consolidating nullsafe logic and making it
type-agnostic
Reviewed By: artempyanykh
Differential Revision: D17808485
fbshipit-source-id: 85356c625
Summary:
The current usage has several issues reducing code maintainability and
readability:
1. Null_field_access was misleading: it was used for checking accesing
to arrays as well!
2. But actually, when checking access to array via `length`, we sometimes
pretended it is a field access (hence very tricky code in rendering the
error).
3. "Call receiver consistency" is unclear name, was not obvious that it is all about
calling a method in an object.
Let's also consolidate code.
Reviewed By: artempyanykh
Differential Revision: D17789618
fbshipit-source-id: 9b0f58c9c
Summary:
This proceeds work on abstracting out operations requiring raw
nullability operations from infer core code. This will simplify coming
introducing of intermediate nullability levels
Reviewed By: artempyanykh
Differential Revision: D17789612
fbshipit-source-id: 9a2bea2ed
Summary:
In previous refactoring stages, we operated on AnnotatedNullability
(nullability of a field or method signature together with its origin),
and InferredNullability (nullability of a value in typestate together
with its origin).
Now it is time to extract common Nullability as a type system concept,
together with `<:` and `join` functionality. This was sketched in
`NullsafeRules`, so this diff consolidates this as well.
In follow up diffs, we will reduce/get rid of direct usages of things like
`InferredNullability.is_nullable`. This will simplify introducing
intermediate Nullability types.
Reviewed By: artempyanykh
Differential Revision: D17789599
fbshipit-source-id: f1b9d2dd0
Summary: It is not necessary to have both < and >=, and similarly for <= and >.
Reviewed By: bennostein
Differential Revision: D17665232
fbshipit-source-id: 01b3511f5
Summary: StarvationModels depended on StarvationDomain which is the wrong way around, and forbids using *Models from *Domain.
Reviewed By: mityal
Differential Revision: D17809431
fbshipit-source-id: 5aa369e7c
Summary: The type hierarchy was traversed multiple times when searching for annotations: once for methods/overrides annotated and once for superclasses. This can be done in one pass.
Reviewed By: dulmarod
Differential Revision: D17787172
fbshipit-source-id: 248dd4c27
Summary: Before, we didn't track litho framework callees on client code which was wrong. Now, we replace this with the following: If the callee is `build()` itself or doesn't contain a `build()` in its summary, then we want to track it in the domain. The former makes sense since we always want to track `build()` methods. The latter also makes sense since such a method could be a setter for a prop (as in the case of `prop1` in `buildPropLithoOK` which we were missing before due to the imprecise heuristic that prevented picking up callees in litho).
Reviewed By: ngorogiannis
Differential Revision: D17810704
fbshipit-source-id: 87d88e921
Summary: As a heuristic, litho library calls on non-litho callers are not tracked. This is very imprecise and results in FPs and FNs as exemplified by newly added tests. Instead, we should check to see if the summary contains a `build()` method as will be done in the next diff. This diff adds these tests and refactors the test code.
Reviewed By: skcho
Differential Revision: D17809536
fbshipit-source-id: 6dff1868c
Summary:
Now that terms operate over unbounded, signed, integers rather than
bounded integers, and Boolean operations are treated uniformly with
bitwise operations, it is not necessary to propagate types throughout
arithmetic term manipulation.
Reviewed By: bennostein
Differential Revision: D17665257
fbshipit-source-id: 5236b101d
Summary:
Z.numbits ignores the sign, which allows 2^(N - 1) as representable
within N bits, while it is not. So check explicitly.
Reviewed By: bennostein
Differential Revision: D17665231
fbshipit-source-id: 0d3940517
Summary:
Instead of having separate signed and unsigned operations, use the
signed operations applied to explicit conversion of the arguments
using an unsigned integer interpretation.
Reviewed By: bennostein
Differential Revision: D17665267
fbshipit-source-id: 0b3271e71
Summary:
Add an Extract term form to interpret an integer with given signedness
and bitwidth.
Reviewed By: bennostein
Differential Revision: D17665263
fbshipit-source-id: 1d8917f3c
Summary:
Be more explicit about semantics of unsigned vs. signed conversions,
and fix a few related corner cases.
Reviewed By: bennostein
Differential Revision: D17665268
fbshipit-source-id: 67fecdf34
Summary:
With terms using unbounded two's complement arithmetic, it is not
necessary to special-case 1-bit integers as Booleans.
Reviewed By: ngorogiannis
Differential Revision: D17665228
fbshipit-source-id: a2f280fc3
Summary:
Remove the guards that prevent normalizing in some cases where the
corresponding instruction in LLVM would produce a poison
value. Usefully tracking poison values will be more involved.
Reviewed By: ngorogiannis
Differential Revision: D17665230
fbshipit-source-id: 59fb25042
Summary:
Improve the trace by incorporating the callees and their locations in the call chain (i.e. chain of methods starting from `build()` call)
- extend the domain to contain the callee location
- replace the test results with the new traces
This makes our job much easier to debug FPs in a big codebase.
Reviewed By: skcho
Differential Revision: D17788996
fbshipit-source-id: 31938b5fe
Summary: `litho` checker contained two checkers: required-props and graphQL field accesses. Although they use the same domain, their reporting conditions and analysis details are different. However, they were bundled into the same analysis by adding disjunctions to `exec_instr` to handle both cases. Let's separate them into two different checkers, keeping a modular transfer function and analyzer that is reused by these two checkers.
Reviewed By: skcho
Differential Revision: D17788834
fbshipit-source-id: 47d77063b
Josh Berdine
Nikos Gorogiannis
Ezgi Çiçek
Sungkeun Cho
Mitya Lyubarskiy