Summary:
Refactor `Equality.ppx_classes_diff` into `diff_classes` to construct
the difference between classes maps explicitly, and change
`ppx_classes` to accept such a difference instead of computing it
internally.
This more flexibly composable interface allows elimination of extra
calls to `Equality.entails` to check if the difference is empty.
Reviewed By: jvillard
Differential Revision: D22038488
fbshipit-source-id: c19c18fc8
Summary:
The list interpreted as a conjunction of individual terms in `Sh.pure`
is now redundant with `Term.And`. This patch removes the redundant
list.
Reviewed By: jvillard
Differential Revision: D22035852
fbshipit-source-id: 49c01a078
Summary:
With the current handling of fresh variable generation during symbolic
execution, it is now possible to delay generating fresh variables in
individual small axioms until the precondition is known. In
particular, the existential variables of the precondition formula can
be bound, and then the small axiom can be generated with variables
fresh with respect to them. Previously, the small axioms were
generated with fresh variables that could later clash with the
precondition's existentials, necessitating renaming. This
double-freshening is now eliminated.
Reviewed By: jvillard
Differential Revision: D21974022
fbshipit-source-id: f217bfb9f
Summary:
When fresh variables are generated to name the overwritten value in an
assignment, they should be included in the ghost variables of the
resulting small axiom. This change should have been included in the
elimination of SSA.
Also strengthen assertion checking of small specs during symbolic
execution.
Reviewed By: jvillard
Differential Revision: D21974019
fbshipit-source-id: a66d8dac6
Summary:
Currently the symbolic execution code in `Exec` manually threads
universal and existential variable contexts through virtually every
function. It is easy to mistakenly pass on a context that is not the
latest-extended one, or to forget to add generated variables to the
contexts.
This patch adds a state monad, `Fresh`, to manage the generation of
fresh variables in `Exec`. This is a standard state monad where the
state is two sets of variables: those to which fresh variables must be
chosen fresh, and those which have been generated. This yields an
abstraction where an `'a Fresh.t` value represents a value of type
`'a` which may contain as-yet-unnamed variables, and `Fresh.gen ~wrt
a` generates names that are fresh with respect to `wrt` for all
unnamed variables in `a`, and yields the set of generated variables
together with `a` expressed in terms of those variables.
Reviewed By: jvillard
Differential Revision: D21974018
fbshipit-source-id: 1917e82c0
Summary: Minor code simplification and optimization of `extend_us` in no-op case.
Reviewed By: jvillard
Differential Revision: D21974021
fbshipit-source-id: a8b12b564
Summary:
Change the `Var.Subst` `freshen` and `restrict` constructors to return
the domain and range of the substitution explicitly. Clients generally
need to compute them immediately, and they are at least partially
constructed during the initial substitution construction anyhow. This
may be an incidental minor optimization.
This allows removing the `apply_set` operation, as it's use can be
handled directly from the domain and range sets.
This also allows `Sh.rename` to be split into a function that assumes
that the substitution is restricted to the vocabulary of the formula,
and a wrapper that does this restriction and calls through. This
allows `Sh.freshen_xs` to be simplified slightly, and avoids some
redundant restriction, domain, and range computations.
Reviewed By: jvillard
Differential Revision: D21974017
fbshipit-source-id: aa8b3db24
Summary:
`Domain_sh.from_call.subst` is a substitution that replaces shadowed
variables with fresh ones, which is constructed by `Domain_sh.call`
and used by `Domain_sh.retn`, after inverting it. This patch changes
the stored substitution to the inverted one, and renames it to
`unshadow` for clarity.
After this change, the stored substitutions have the property that
they map variables to program variables. This is desirable since it
avoids the question about the uninverted substitution of whether the
variables in the range of the uninverted substitution are "fresh".
Reviewed By: jvillard
Differential Revision: D21974020
fbshipit-source-id: d469c89f9
Summary:
Logically there is nothing specific to memory contents (as
byte-arrays) or aggregate (struct/array) values, the theory is for
sequences of non-fixed sized elements.
Reviewed By: jvillard
Differential Revision: D21721019
fbshipit-source-id: b2b730a50
Summary:
`Term.eq_concat` is not primitive and complicates the `Term`
interface. Move it to a couple clients as a convenience wrapper.
Reviewed By: jvillard
Differential Revision: D21721026
fbshipit-source-id: 0d74aa251
Summary:
Previously `null` and `zero` had different sorts/types, but now they
are equivalent.
Reviewed By: jvillard
Differential Revision: D21721023
fbshipit-source-id: 485219f6a
Summary:
Multiplication by a constant is primitive in the linear arithmetic
solver, while general multiplication is not, so for clarity and
predictability, use constants where possible.
Reviewed By: jvillard
Differential Revision: D21721020
fbshipit-source-id: 3497d06c9
Summary:
It is suboptimal for `Sh` to destruct terms with detailed knowledge of
their representation. So add `Term.const_of` to obtain the constant
summand of a polynomial term.
Reviewed By: jvillard
Differential Revision: D21721022
fbshipit-source-id: 4af858896
Summary:
It is suboptimal for `Sh` to destruct terms with detailed knowledge of
their representation. So add `Term.d_int` to destruct an integer term.
Reviewed By: jvillard
Differential Revision: D21721024
fbshipit-source-id: 5f13794b6
Summary:
It is suboptimal for `Sh` to destruct terms with detailed knowledge of
their representation. So add `Term.disjuncts` to obtain the toplevel
disjuncts of a term.
Reviewed By: jvillard
Differential Revision: D21721016
fbshipit-source-id: 809da9b1b
Summary:
This diff adds a prototype of a new checker that collects config checkings between markers.
Basically, what the checker is doing is a taint analysis.
* Taint source: function calls of "marker start"
* Taint sink: function calls of config checking
* Taint remove: function calls of "marker end"
By the taint analysis, the analysis results will say that which taints can reach to the sink. In other words, which marker ID that has been started can reach to the config checks, before marker's ending.
I am separating the diff into three steps:
(1/3) Add basic abstract semantics
(2/3) Add trace information
(3/3) Add reporting with test examples
Reviewed By: jvillard
Differential Revision: D21998170
fbshipit-source-id: e7759f62f
Summary:
This diff adds a prototype of a new checker that collects config checkings between markers.
Basically, what the checker is doing is a taint analysis.
* Taint source: function calls of "marker start"
* Taint sink: function calls of config checking
* Taint remove: function calls of "marker end"
By the taint analysis, the analysis results will say that which taints can reach to the sink. In other words, which marker ID that has been started can reach to the config checks, before marker's ending.
I am separating the diff into three steps:
(1/3) Add basic abstract semantics
(2/3) Add trace information
(3/3) Add reporting with test examples
Reviewed By: jvillard
Differential Revision: D21998150
fbshipit-source-id: 337a8938a
Summary:
This diff adds a prototype of a new checker that collects config checkings between markers.
Basically, what the checker is doing is a taint analysis.
* Taint source: function calls of "marker start"
* Taint sink: function calls of config checking
* Taint remove: function calls of "marker end"
By the taint analysis, the analysis results will say that which taints can reach to the sink. In other words, which marker ID that has been started can reach to the config checks, before marker's ending.
I am separating the diff into three steps:
(1/3) Add basic abstract semantics
(2/3) Add trace information
(3/3) Add reporting with test examples
Reviewed By: jvillard
Differential Revision: D21935546
fbshipit-source-id: 092abb92c
Summary: Most of them had some form of documentation in source comments.
Reviewed By: ngorogiannis
Differential Revision: D22020016
fbshipit-source-id: 468f86658
Summary: Pulse has now a better version of this check, so let's delete it.
Reviewed By: ngorogiannis
Differential Revision: D22019247
fbshipit-source-id: 344678225
Summary: Remove unsafe invocations of `String.rsplit2_exn` as this code may run on C++.
Reviewed By: dulmarod, jvillard
Differential Revision: D22042750
fbshipit-source-id: b2879e17b
Summary:
This issue type was not giving good results and can be replaced by
Pulse's version.
Reviewed By: ngorogiannis
Differential Revision: D22019551
fbshipit-source-id: 5cf3db46d
Summary:
Add objc test case for ```NSInteger``` and ```NSString```.
The test cases are adapted from java test case: ```IntTest.java```, ```StringBuilder.java```, and ```StringTest.java```.
Inspection of the record will be done later.
Reviewed By: ezgicicek
Differential Revision: D21994620
fbshipit-source-id: 0c1d7b34e
Summary: To avoid NULLPTR_DEREFERENCE false positives we want to treat some functions as `abort`. A new flag `--pulse-model-abort` allows us to provide a list of such functions.
Reviewed By: ezgicicek
Differential Revision: D21962555
fbshipit-source-id: d46b93c99
Summary:
Hi,
I have found a couple of small issues while reading the docs. The pull request contains the fixes.
BTW, the link to PLDI slices is also broken here: https://fbinfer.com/docs/absint-framework. I haven't found the slides anywhere, so not sure how to fix it.
Pull Request resolved: https://github.com/facebook/infer/pull/1278
Reviewed By: dulmarod
Differential Revision: D22018947
Pulled By: jvillard
fbshipit-source-id: 13f6d27b1
Summary: The new memory leaks analysis is now ready to be enabled by default and turned on in production. This also replaces the biabduction one which is now disabled.
Reviewed By: jvillard
Differential Revision: D21998666
fbshipit-source-id: 9cd95e894
Summary:
Turns out it was useful, so it is now reborn in OCaml.
Fixes https://github.com/facebook/infer/issues/1262.
Reviewed By: skcho
Differential Revision: D22016185
fbshipit-source-id: 31ccb7540
Summary:
Hopefully solve issues with people having versions of sqlite that make
infer crash.
Fix#1081.
Reviewed By: skcho
Differential Revision: D21998757
fbshipit-source-id: 4baabc1c3
Summary:
This is mostly a partial revert of D19022905 and D19272627 for only the
part of it concerned with "install-with-libs".
Fixes#1260.
Reviewed By: skcho
Differential Revision: D21998484
fbshipit-source-id: ed884e772
Summary:
This models ARC implementation of dealloc, see https://clang.llvm.org/docs/AutomaticReferenceCounting.html#dealloc. Dealloc methods can be added to ObjC classes to free C memory for example, but the deallocation of the ObjC instance variables of the object is done automatically. So here we add this explicitly to Infer:
1. First, we add an empty dealloc method when it is not written explicitly.
2. For each dealloc method (including the implicitly added ones) we add calls to dealloc of the ObjC instance variables.
Reviewed By: jvillard
Differential Revision: D21883546
fbshipit-source-id: f5d4930f2
Summary:
This diff avoids `infer report`s run parallel. If they do, there may be race for writing
`infer-out/.infer_runstate.json`, which result in `make test` failure in the next time.
Reviewed By: jvillard
Differential Revision: D21999073
fbshipit-source-id: 64df79cb6
Summary: We don't rely on `external-java-packages` in the inferconfig anymore. Let's remove it altogether.
Reviewed By: jvillard
Differential Revision: D21997962
fbshipit-source-id: 7a2e13cfe
Summary:
The page itself was already there but not linked from the rest of the
website.
Reviewed By: ezgicicek
Differential Revision: D21997950
fbshipit-source-id: 30380da65
Summary:
Finish implementing the CLI of the `help` command with these two
functions that can provide more information about checkers.
Reviewed By: ngorogiannis
Differential Revision: D21937175
fbshipit-source-id: da6b3ecee
Summary:
Delete the following outdated pages. Some of them have better
replacements now but some of them are just too out of date to easily
salvage.
- 01-adding-models.md: this is biabduction-specific and hard to make
that distinction. Most checkers have no way to add models. Even
suggesting that people add their own biabduction models was a bit
awkward as it requires recompiling infer to use.
- 01-checkers.md: outdated document that describes "new" checkers like
Quandary :)
- 01-experimental-checkers.md: very outdated!
- 02-limitations.md: also outdated: it roughly says "we don't do concurrency or
arithmetic, the former is basically impossible but the latter should
be easy"... well, 5 years later this hasn't aged too well ;)
- 01-eradicate.md: content has moved to auto-generated documentation
- 01-linters.md: content has moved to auto-generated documentation
- 01-racerd.md: content has moved to auto-generated documentation
Reviewed By: mityal
Differential Revision: D21934748
fbshipit-source-id: a933e5022
Josh Berdine
Sungkeun Cho
Jules Villard
Dulma Churchill
Nikos Gorogiannis
Ezgi Çiçek
Qianyi Shu
Daiva Naudziuniene
Artem Pianykh
Marat Khabibullin