Summary:
This will be useful to make the analysis more precise. In particular, it
allows a disjunctive version of pulse to deal will deleting vector
elements in a loop: without this, deleting an array element in one
iteration will make the analysis think that the next array element is
invalid too since they are all the same. By keep track of the index, we
can detect when we are sure that two elements are the same and only
report in that case.
Reviewed By: ngorogiannis
Differential Revision: D13431374
fbshipit-source-id: dae82deeb
Summary:
`AccessExpression.t` represents array accesses as `ArrayOffset of t * Typ.t * t
list`, i.e. the index is represented by a list of access expressions. This is
not precise enough when indices cannot be represented as such. In fact, in
general any `HilExp.t` can be an array index but this type was an approximation
that was good enough for existing checkers based on HIL.
This diff changes the type of access expressions to be parametric in the type
of array offsets, and uses this to record `HilExp.t` into them when translating
from SIL to HIL.
To accomodate the option of not caring about array offsets
(`include_array_indexes=false`), the type of array offsets is an option type.
Reviewed By: mbouaziz
Differential Revision: D13360944
fbshipit-source-id: b01442459
Summary:
`AccessExpression.t` and `HilExp.t` are about to become mutually
recursive, this will help distinguish the actual changes from the moving
of code around.
Reviewed By: mbouaziz
Differential Revision: D13377644
fbshipit-source-id: 9d6f290b6
Summary:
It enables the translation of casting expression. As of now, it
translates only the castings of pointers to integer types, in order to
avoid too much of change, which may mess the checkers up.
Reviewed By: jvillard
Differential Revision: D12920568
fbshipit-source-id: a5489df24
Summary: Make the whole type private, introduce constructors for each variant, and deal with the consequences.
Reviewed By: da319
Differential Revision: D12825810
fbshipit-source-id: a01922812
Summary:
Change the license of the source code from BSD + PATENTS to MIT.
Change `checkCopyright` to reflect the new license and learn some new file
types.
Generated with:
```
git grep BSD | xargs -n 1 ./scripts/checkCopyright -i
```
Reviewed By: jeremydubreil, mbouaziz, jberdine
Differential Revision: D8071249
fbshipit-source-id: 97ca23a
Summary:
This is an attempt to make things more consistent, and maybe save some work
from the `Format` module in case flambda doesn't have our backs.
Reviewed By: jberdine
Differential Revision: D7775496
fbshipit-source-id: 59a6314
Summary:
Upgrade ocamlformat, and base which needs to be done in sync in order to build
ocamlformat, and the other deps can come for the ride.
Reviewed By: jvillard
Differential Revision: D7663537
fbshipit-source-id: 3e90970
Summary: If a `Closure` expression `e` captures variable `x`, consider `e` as borrowing from `x`. When the closure is invoked via `operator()`, check that the borrow is still valid.
Reviewed By: jeremydubreil
Differential Revision: D7071839
fbshipit-source-id: d923a6a
Summary: Preparing to extend HIL with Dereference and AddressOf expressions. Next steps: (1) change SIL -> HIL translation to preserve address of and dereference; (2) adapt analyses based on HIL to make use access expressions.
Reviewed By: jeremydubreil
Differential Revision: D6961928
fbshipit-source-id: 51da919
Summary:
Upgrade ocamlformat to 0.3, and (necessarily) base to v0.10.0.
- Fix accumulated mis-formatting
- Update opam.lock to unbreak clean build
- Update to base v0.10.0
- Update opam.lock for base
- Update offline opam repo
- Everyone should already have removed their ocamlformat pin
- ocamlformat 0.3 supports output to stdout natively
- bump version of ocamlformat
Reviewed By: jeremydubreil
Differential Revision: D6636741
fbshipit-source-id: 41a56a8
Summary:
Install ocamlformat from github as part of `make devsetup`, and use it
for formatting OCaml (and jbuild) code.
Reviewed By: jvillard
Differential Revision: D6092464
fbshipit-source-id: 4ba0845
Summary:
- failwith police: no more `failwith`. Instead, use `Logging.die`.
- Introduce the `SimpleLogging` module for dying from modules where `Logging`
cannot be used (usually because that would create a cyclic dependency).
- always log backtraces, and show backtraces on the console except for usage errors
- Also point out in the log file where the toplevel executions of infer happen
Reviewed By: jeremydubreil
Differential Revision: D5726362
fbshipit-source-id: d7a01fc
Summary:
Record the list of access paths (if any) used in the index expression for each array access.
This will make it possible to use array accesses as sinks in Quandary
Reviewed By: jeremydubreil
Differential Revision: D5531356
fbshipit-source-id: 8204909
Summary:
It's nice to have "raw" as the default kind of access path, since it's used much more often than the abstraction.
This is also a prereq for supporting index expressions in access paths, since we'll need mutual recursion between accesses and access paths.
Reviewed By: jeremydubreil
Differential Revision: D5529807
fbshipit-source-id: cb3f521
Summary:
Conversion and reformat of infer source using ocamlformat
auto-formatting tool.
Current status:
- Because Reason does not handle docstrings, the output of the
conversion is not 'Warning 50'-clean, meaning that there are
docstrings with ambiguous placement. I'll need to manually fix
them just before landing.
Reviewed By: jvillard
Differential Revision: D5225546
fbshipit-source-id: 3bd2786
Summary:
The thread safety domain manipulates access paths that are a variable
followed by a sequence of field or index accesses. Some expressions
from C++ code do not fit that form, such as cases where subtraction of
an offset from a pointer is used to obtain another pointer, whose
fields are then accessed. Previously the analyzer would crash on such
expressions. This diff partially treats them by introducing dummy
variables.
Reviewed By: da319
Differential Revision: D5343567
fbshipit-source-id: f73b520
Summary:
Indexing into a string literal expression would generate a fresh
variable on every application of a transformer. This violated
finiteness of the domain, and caused divergence.
Reviewed By: da319
Differential Revision: D5342951
fbshipit-source-id: e95e84e
Summary:
HIL had only been tested in Java, and it made some assumptions about what array expressions look like (the LHS is always resolvable to an access path) and assignments (the LHS is always an access path) that aren't true in C.
Fixed the code so we won't crash in this case.
Thanks to jeremydubreil for catching this.
Reviewed By: jeremydubreil
Differential Revision: D5047649
fbshipit-source-id: e8484f4
Summary:
Modify the type of `Exp.Sizeof ...` to include the value that the expression
evaluates to according to the compiler, or None if it cannot be known
statically.
Use this information in inferbo.
Mostly unused in the BiAbduction checker for now, although it could be useful
there too.
update-submodule: facebook-clang-plugins
Reviewed By: mbouaziz
Differential Revision: D4953634
fbshipit-source-id: be0999d
Mehdi Bouaziz
Jules Villard
Sungkeun Cho
Josh Berdine
Nikos Gorogiannis
Daiva Naudziuniene
Sam Blackshear