Summary:
Remove the remaining uses of polymorphic equality `=`.
In case of basic types, this is replaced by String.equal or Int.equal.
In case of `= []`, this is replaced by `List.is_empty`.
In case of `= None`, this is replaced by `is_none`.
In case of a datatype definition such as `type a = A | B`,
a `compare_a` function is defined by adding `type a = A | B [@deriving compare]`
and a `equal_a` function is defined as `let equal_a = [%compare.equal : a]`.
In case of comparison with a polymorphic variant `= `Yes`, the equality
defined in `PVariant.(=)` is used. Typically, `open! Pvariant` is added
at the beginning of the file to cover all the uses.
Reviewed By: jberdine
Differential Revision: D4456129
fbshipit-source-id: f31c433
Summary:
Use In_channel and Out_channel operations instead of those in Pervasives. Don't
use physical equality on values that aren't heap-allocated since it doesn't help
the compiler generate faster code and the semantics is unspecified. Also use
phys_equal for physical equality.
Reviewed By: sblackshear
Differential Revision: D4232459
fbshipit-source-id: 36fcfa8
Summary:
Utils contains definitions intended to be in the global namespace for
all of the infer code-base, as well as pretty-printing functions, and
assorted utility functions mostly for dealing with files and processes.
This diff changes the module opened into the global namespace to
IStd (Std conflict with extlib), and moves the pretty-printing
definitions from Utils to Pp.
Reviewed By: jvillard
Differential Revision: D4232457
fbshipit-source-id: 1e070e0
Summary:
Functions related to source files were already namespaced by `source_file_` prefix. Make separate module for them.
In high level it replaces all `source_file_` with `SourceFile.` and then fixes all remaining compilation errors
Reviewed By: jvillard
Differential Revision: D4299053
fbshipit-source-id: 20b1d39
Summary:
Summaries are modified before saving from disk, for example the attributes of the postcondition can change.
I have observed flaky reports of the internal error NULL_TEST_AFTER_DEREFERENCE. Some attributes (e.g. assigned) are changed before saving, but the spec table in memory is not changed.
So in case:
1) the procedure is analyzed on-demand, then subsequent uses in the same process use the summary in memory with the unchanged attribute, and the issue is not reported.
2) the procedure is already on disk and loaded, then the loaded summary has the changed attributes, and the issue is reported.
Flakiness happens as because of parallelism, whether a procedure is analyzed already or whether it is analyzed on-demand, can change.
The normalization function can change the instrumentation of a symbolic heap because it uses the existing comparison functions, which ignore instrumentations.
So normalization can replace part of a symbolic heap with an identical one but where the instrumentation is different — this is what I have observed.
The diff uses a different comparison function where instrumentations are taken into account.
Reviewed By: jberdine
Differential Revision: D4140031
fbshipit-source-id: f4f119a
Summary:
Create dummy functions representing the initializers of global variables. This
is so we can implement checks in the backend that can look at the initializer
expressions of global variables. We try not to create these dummy functions
when the initializer is not present, although for some reason we sometimes end
up with empty initializers.
Also add source file info to global variables in the backend (Pvar.re).
Reviewed By: sblackshear
Differential Revision: D3780238
fbshipit-source-id: 2dca87e
Summary:
Change Sil.Call instruction to have only a single optional return
identifier, insted of a list. Essentially none of the code handled
multiple return identifiers. Also, add the type of the return
identitifier to Call instructions.
Reviewed By: sblackshear
Differential Revision: D3919358
fbshipit-source-id: d2d4f72
Summary:
Refactor Sil.struct_typ and associated operations into a separate
StructTyp module. This is possible now that Typ.Tstruct only carries a
type name instead of the definition directly, and is helpful to simplify
module dependencies.
Reviewed By: cristianoc
Differential Revision: D3919357
fbshipit-source-id: a37a656
Summary:
This diff removes the redundancy in the representation of types where
struct types could be represented either directly using Tstruct or
indirectly using Tvar to refer to the type environment. A consequence
is that it is much harder to construct large type values.
Reviewed By: sblackshear, cristianoc
Differential Revision: D3839753
fbshipit-source-id: cf04ea5
Summary:
Move the Sil.attribute type and associated types and operations to a new
PredSymb module.
Reviewed By: cristianoc
Differential Revision: D3683834
fbshipit-source-id: d3606a8
Summary:
Change the Aobjc_null attribute from a family of unary predicates, one
for each Pvar.t * Ident.fieldname list, to a single binary predicate.
This diff should not change behavior except for printing of Aobjc_null
attributes. Also, operations such as free variables, etc. should now
behave correctly with respect to variables occurring in the arguments of
Aobjc_null.
Reviewed By: cristianoc
Differential Revision: D3669392
fbshipit-source-id: fe4434a
Summary:
Add support for nary predicates, not just unary ones. Many operations
don't make much sense for nullary predicates, and are generally treated
as no-ops. The first argument is treated specially, as the "anchor" of
the predicate application. For example, adding or removing an attribute
uses the anchor to identify the atom to operate on. Also, abstraction
and normalization operations treat the anchor specially.
Reviewed By: cristianoc
Differential Revision: D3669391
fbshipit-source-id: 3d142ea
Summary:
Change representation of pure predicate applications to distinguish
between positive and negative literals using the Apred and Anpred
constructors instead of a boolean field.
This representation is more compact, and is uniform with the treatment
of equalities and disequalities. Some code is simpler, but there isn't
much in it.
Reviewed By: cristianoc
Differential Revision: D3669387
fbshipit-source-id: 07cdea6
Summary:
Replace disequalities to Attribute expressions with predicate symbol
application pure atomic formulas.
This diff should preserve existing behavior, up to the comparison order
of attribute disequalities versus predicate applications.
Reviewed By: sblackshear
Differential Revision: D3647049
fbshipit-source-id: c39a901
Summary: Move Sil.dexp type and operations into separate DecompExp module.
Reviewed By: dulmarod
Differential Revision: D3548095
fbshipit-source-id: 5ab4360
Summary:
Move Sil.call_flags type and operations into separate CallFlags
module.
Reviewed By: dulmarod
Differential Revision: D3548086
fbshipit-source-id: 6d264e9
Summary: Move Sil.binop type and operations into separate Binop module.
Reviewed By: dulmarod
Differential Revision: D3548082
fbshipit-source-id: 356bee3
Summary: Move Sil.unop type and operations into separate Unop module.
Reviewed By: dulmarod
Differential Revision: D3548077
fbshipit-source-id: 49d3d83
Summary: Move Sil.const type and operations into separate Const module.
Reviewed By: dulmarod
Differential Revision: D3548073
fbshipit-source-id: 388d03e
Summary:
Remove recursion from strexp type and functions that is no longer
needed.
Reviewed By: dulmarod
Differential Revision: D3548070
fbshipit-source-id: c4999b7
Summary:
Remove recursion from dexp type and functions that is no longer
needed.
Reviewed By: dulmarod
Differential Revision: D3548068
fbshipit-source-id: 79de8b6
Summary:
Remove recursion from const type and functions that is no longer
needed.
Reviewed By: dulmarod
Differential Revision: D3548064
fbshipit-source-id: e123c24
Summary:
Move attribute values from const to exp. They are not constants, and
this reduces interdependence between Sil types.
Reviewed By: cristianoc
Differential Revision: D3548055
fbshipit-source-id: 31a9121
Summary:
The Aobjc_null attribute does not need a fully general exp. This diff
refines this to a possibly-empty path of fields starting from a pvar,
which reduces interdependence between Sil types.
Reviewed By: dulmarod
Differential Revision: D3548043
fbshipit-source-id: 49d16ab
Cristiano Calcagno
Josh Berdine
Andrzej Kotulski
Sam Blackshear
Jules Villard