Summary:
Detect when a variable goes out of scope. When that's the case, mark its
address *and* its contents as invalid.
Give subsequent uses a USE_AFTER_LIFETIME error type instead of
USE_AFTER_DESTRUCTOR.
Reviewed By: jberdine
Differential Revision: D14387147
fbshipit-source-id: a2c530fda
Summary:
This provides a way for AI checkers to read the formals of a procedure,
or other things related to its `Procdesc.t`.
Reviewed By: mbouaziz
Differential Revision: D14258483
fbshipit-source-id: a28e28d3c
Summary:
For each operation on the domain, try to record what it requires of the
precondition of the function. This is akin to what happens in the
biabduction backend, hence the terminology used.
Reviewed By: jberdine
Differential Revision: D14387148
fbshipit-source-id: a61fe30c8
Summary:
This is in preparation of interprocedural pulse. The abstract addresses
generator keeps a reference to create fresh addresses, but that's a
piece of global state that needs to persist across ondemand analyses.
Reviewed By: jberdine
Differential Revision: D14324760
fbshipit-source-id: 5cdb1d3f5
Summary:
Increases precision a bit. I didn't observe speed problems on what I tested. (But, who knows?)
Closes https://github.com/facebook/infer/pull/799
Reviewed By: jvillard
Differential Revision: D6284206
Pulled By: rgrig
fbshipit-source-id: 6f1e8631f
Summary:
Instead of emitting an ad-hoc builtin on variable declaration emit a new
metadata instruction. This allows us to remove the code matching on that
ad-hoc builtin that had to be inserted in several checkers.
Inferbo & pulse used that information meaningfully and had to undergo
some minor changes to cope with the new metada instruction.
Reviewed By: ezgicicek
Differential Revision: D14833100
fbshipit-source-id: 9b3009d22
Summary:
Bundle all non-semantic-bearing instructions into a `Metadata _`
instruction in SIL.
- On a documentation level this makes clearer the distinction between
instructions that encode the semantics of the program and those that are
just hints for the various backend analysis.
- This makes it easier to add more of these auxiliary instructions in
the future. For example, the next diff introduces a new `Skip` auxiliary
instruction to replace the hacky `ExitScope([], Location.dummy)`.
- It also makes it easier to surface all current and future such
auxiliary instructions to HIL as the datatype for these syntactic hints
can be shared between SIL and HIL. This diff brings `Nullify` and
`Abstract` to HIL for free.
Reviewed By: ngorogiannis
Differential Revision: D14827674
fbshipit-source-id: f68fe2110
Summary:
Several tools that use ocamlformat look for the "project root" in
order to find the config for a given file to format. The project root
is inferred by looking in ancestor directories of the input file until
one of .git, .hg, or dune-project is found. Since the .ocamlformat
config file is currently two directories higher than dune-project,
this fails. This diff moves the config file.
Reviewed By: jvillard
Differential Revision: D14694260
fbshipit-source-id: 2fb51bf30
Summary:
Very minor change, but uses the latest opam version available.
Please see [CONTRIBUTING.md](./CONTRIBUTING.md) for how to set up your development environment and run tests.
Pull Request resolved: https://github.com/facebook/infer/pull/1077
Differential Revision: D14703257
Pulled By: jvillard
fbshipit-source-id: 61c8dbd1e
Summary:
This diff propagates LatestPrune on function calls.
Depends on D14321605
Reviewed By: mbouaziz
Differential Revision: D14321618
fbshipit-source-id: cb2e1b547
Summary:
Given a pointer-typed parameter, Inferbo assumes that it is an array
block. However, when a pointer is given as an actual parameter, it
failed the substitution of the array block value of the parameter, thus
which made some return values to bottom unexpectedly.
This diff revises the substitution of array block, so it can
substitute array block values with actual pointers correctly when it
is possible.
Reviewed By: mbouaziz
Differential Revision: D14663475
fbshipit-source-id: 0477de1ba
Summary:
It does more reachability checks on prunings. Before the diff, it checked the reachability only by the condition expression of prune commands, but now also uses PrunePairs.
Depends on D14321575
Reviewed By: mbouaziz
Differential Revision: D14321605
fbshipit-source-id: f630de842
Summary:
When comparing stacks as part of a control-flow edge, treat each as a
code location in a hypothetical expansion of the program where all
non-recursive functions have been completely inlined. In particular,
this means to compare stacks as if all Locals frames or Return frames
for recursive calls had been removed. Additionally, the from_call info
in Return frames is ignored.
Reviewed By: jvillard
Differential Revision: D14657601
fbshipit-source-id: b8a42d3fa
Summary:
This diff accumulates LatestPrune in sequential prunings. It should be sound since Inferbo invalidates some data of LatestPrune if they are updated.
Depends on D14321534
Reviewed By: mbouaziz
Differential Revision: D14321575
fbshipit-source-id: 233dbae32
Summary:
Some of these tests were wrong, eg `~lambda()` calls `lambda()` then...
takes the bitwise complement or something? The intent was to call the
destructor.
Add interprocedural tests for later.
Reviewed By: jberdine
Differential Revision: D14324762
fbshipit-source-id: 40d2c32f5
Summary:
Previously we would say that `lhs <= rhs` (or `lhs |- rhs`) when a
mapping existed between the abstract addresses of `lhs` and `rhs` such
that `mapping(lhs)` was a supergraph of `rhs`. In particular,
we had that `x |-> x' * x' |-> x'' |- x |-> x'`. This is not entirely
great, in particular once we get pairs of state representing footprint +
current state. I'm not sure I have an extremely compelling argument why
though, except that it's not the usual way we do implication in SL, but
there wasn't a compelling argument for the previous state of affairs
either.
This changes `|-` to be true only when `mapping(lhs) = rhs` (modulo only
considering the addresses reachable from the stack variables).
Reviewed By: jberdine
Differential Revision: D14568272
fbshipit-source-id: 1bb83950e
Summary: This helps convergence when `<=` is based on physical equality for example, and widening is implemented as `widen ~prev ~next = join prev next`.
Reviewed By: skcho
Differential Revision: D14568270
fbshipit-source-id: ded5ed296
Summary: It's all grown up now and taking quite some space in src/checkers/.
Reviewed By: skcho
Differential Revision: D14568273
fbshipit-source-id: b843c031e
Summary:
Open fewer sessions by wrapping AI operations together in the same HTML
node session. This allows us to also print more stuff, such as whether
the current loop computation has converged.
Reviewed By: skcho
Differential Revision: D14568274
fbshipit-source-id: d47110cf4
Summary:
Re-declarations of global variables sometimes hide constant
initializations in the original declaration, which caused FN before.
In this diff, it translates global variables to point to original
declarations, rather than following re-declarations, if possible.
Reviewed By: mbouaziz, jvillard
Differential Revision: D14596301
fbshipit-source-id: 55c3b5f95
Summary: In SIL, sometimes a return value is assigned to `__return_param`.
Reviewed By: ezgicicek, mbouaziz
Differential Revision: D14538590
fbshipit-source-id: dfbb74dc2
Jules Villard
Radu Grigore
Ezgi Çiçek
David Lively
Nikos Gorogiannis
Dino Distefano
Katie Ots
Josh Berdine
Anton Kochkov
Sungkeun Cho
Jeremy Dubreil