Summary:
This diff extends the `Simple` alias domain to address Java's
temporary variables better. It now has an additional field to denote
an alias temporary variable.
Reviewed By: jvillard
Differential Revision: D17421907
fbshipit-source-id: 8b8b47461
Summary:
We historically had Model.Inference, which was an attempt to enhance
models with additional abilities to get the annotation.
This feature got removed in D9805110, including removing of the key
condition Models.Inference.field_is_marked.
This code also is not executed: `Config.eradicate` condition
was an old artefact of migrating Eradicate to callback infrastructure:
D1508451. We run eradicate only as a callback as of now, so this flag is
always true.
In follow up diffs we refactor AnnotationSignature module, and this
cleanup simplifies the refactoring.
Reviewed By: ngorogiannis
Differential Revision: D17419173
fbshipit-source-id: 1b30555de
Summary:
CONDITION_REDUNDANT_NONNULL was an attempt to reduce number of false
positives for condition redundant. (It is the most popular check as of
now).
The root case for most of false positives is that a lot of code is
simply not annotated (but should have been), so blaming developers for defense programming is
not actionable.
In attempt to solve the problem, a special issue type (for case when the
code is explicitly annotated with Nonnull) was introduced.
In follow up diffs we are going to introduce a generic way of doing the
same, not limited to this particular check only.
Namely, we will introduce notion of unknown nullability, so it will be
possible to distinguish not annotated yet (hence no warnings) and already
annotated (hence warnings) parts of code.
This piece of logic is incompatible with the aforementioned work, hence
we need to remove it.
Reviewed By: jvillard
Differential Revision: D17398768
fbshipit-source-id: 8bddf10e5
Summary:
This diff simplifies two similar alias targets: AliasTarget.Simple and
AliasTarget.SimplePlusA. Since the latter is simply extended version
of the former, they are better to have a common constructor.
Reviewed By: jvillard
Differential Revision: D17421416
fbshipit-source-id: e0946a73b
Summary:
This diff revises widening functions of bounds that have a linear form and a min/max form.
For example, for lower bounds,
* 3 ▽ (1+min(2, x)) = (1+min(2, x))
* 3+x ▽ (3+min(2, x)) = (3+min(2, x))
Reviewed By: jvillard
Differential Revision: D17420786
fbshipit-source-id: ff9eebed3
Summary: This diff ignores field's type in their comparisons. They should be distinguished by their names and struct types.
Reviewed By: dulmarod
Differential Revision: D17284621
fbshipit-source-id: ae8a33083
Summary:
This diff addresses collection adds in loop. For example,
```
ArrayList<...> a = new ArrayList<>();
for (int i = 0; i < size; i++) {
a.add(...);
}
// we want to know the size of `a` here!
```
This is a common pattern on initializing a collection in Java.
How we did: Instead of adopting general (but complicated) solutions such as relational domain, we
extended the current alias domain of inferbo, to be able to handle this specific case:
* An array `a` should have size 0, at the entry of the loop.
* The iterating variable `i` should start with 0.
* `add` should be called once inside the loop.
Reviewed By: jvillard
Differential Revision: D17319350
fbshipit-source-id: 99b6acae1
Summary:
Sqlite versions set their own default page and cache size. Old versions use crazy-non-optimal settings.
Allow setting both from command line and set up reasonable defaults. See, e.g.,
https://wiki.mozilla.org/Performance/Avoid_SQLite_In_Your_Next_Firefox_Feature
for page size notes.
The defaults will cost a maximum of 64Mb in cache per Infer process. These improve merging times significantly.
Reviewed By: jvillard
Differential Revision: D17364643
fbshipit-source-id: b9abab10f
Summary:
At some point, there was a custom equality function that deliberately ignored some fields in err_instance. It was deleted in D4232422, so having a custom hash function does not serve any purpose anymore.
Since 2016 there was no known problems with the change in D4232422.
If we decide that we need similar behavior that was before D4232422, it will be easier to reimplement the functionality again.
Reviewed By: jberdine
Differential Revision: D17313660
fbshipit-source-id: 5c6c29a0b
Summary:
We want to allow following declaration
```
CK::UIContext t(foo);
```
In this case t is only part of the scope and we don't want to check that is never mutated.
Reviewed By: kfirapps
Differential Revision: D17367040
fbshipit-source-id: 5312a1249
Summary: This calls the method `delete_capture_and_analysis_data` introduced in D17184424 once the appropriate specs files for incremental analysis have been deleted. This fixes two bugs that I observed in incremental analysis that were arising because of stale state left in the results directory.
Reviewed By: ngorogiannis
Differential Revision: D17184424
fbshipit-source-id: d63f59db9
Summary:
I observed a bug in incremental analysis for thread safety analysis, where a thread safety violation was not being reported because the folder `racerd` was not being cleaned. This meant that the violation was determined to be a preexisting issue when it was actually an introduced issue.
This method can be used to fix this problem by cleaning the `racerd` folder. It also cleans the `captured` folder, I've done this following the original version of the method (see D16602417).
I'm not sure if the `captured` folder is used; it wasn't used in the tests I did. Thoughts about this?
Reviewed By: ngorogiannis
Differential Revision: D17261504
fbshipit-source-id: 8fea23e98
Summary:
There is currently a bug in incremental analysis because the capture data is not reset once the specs files have been invalidated. This has caused a problem where cost issues that should be reported are not spotted. I'm introducing this method so I can use it to fix incremental analysis.
This method is resurrected from D16602417
Reviewed By: ngorogiannis
Differential Revision: D17184401
fbshipit-source-id: e84925324
Summary: It prints debug information when top values is generated.
Reviewed By: ngorogiannis
Differential Revision: D17285448
fbshipit-source-id: 0621fd36d
Summary:
This check was an incomplete attempt to make nullsafe check nutritious
annotations for fields that get modified.
This was never fully productionized, and this check is turned off by
default.
In near future, we don't anticipate supporting this feature, so let's
remove it to simplify the code.
Reviewed By: artempyanykh
Differential Revision: D17282015
fbshipit-source-id: d63a2f1f7
Summary:
There are currently plenty of ways to suppress the warning, including Inject, Initializer, and SuppressFieldNotInitialized annotations.
This one (annotating field with Nonnull) is counter-intuitive and does not align with gradual nullsafe
semantics we are working on.
Reviewed By: artempyanykh
Differential Revision: D17281702
fbshipit-source-id: 132e1b687
Summary:
This diff ignores character symbols in the cost results, in order to
avoid FPs from parser code.
Reviewed By: ezgicicek
Differential Revision: D17132053
fbshipit-source-id: d9cf8bd26
Summary: This diff adds models of Java String. In order to keep the precision of cost checker, I fixed cost models for String in this diff too.
Reviewed By: ngorogiannis
Differential Revision: D17203309
fbshipit-source-id: 8cc2814fc
Summary:
This diff makes the checkers, except biabduction, to use `typ` instead
of `root_typ` of `Load`/`Store` statemetns.
Reviewed By: dulmarod
Differential Revision: D17203105
fbshipit-source-id: 8be9b5158
Summary:
It adds typ field in Sil.Store. The field will be used by the analyzer in the following diffs.
Motivation: Interbo generates a symbolic value when evaluating expressions including parameter symbols. At that time, it is done with depending on their types, e.g., an integer, a pointer to struct or a pointer to array. Without the type, it is hard to generate a correct symbolic value that will be instantiated later in call sites. Thus, evaluating RHS of the store statement, the type of RHS is better to be given.
Reviewed By: dulmarod
Differential Revision: D17185346
fbshipit-source-id: f0945c40f
Summary: Use_after_free was used both for biabduction and pulse, and the biabduction version is blacklisted by default. As a result, the Pulse version was also disabled unintentionally. This changes the name of the old use_after_free so that now we can get use_after_free bugs whenever pulse is enabled.
Reviewed By: skcho
Differential Revision: D17182687
fbshipit-source-id: 539ca69de
Summary:
In integrations where the capturing process isn't forked off the main Infer process, but launched, eg, via a script pretending to be a compiler, the reference indicating whether the server is running will always be false, and thus such integrations will never try to connect to the write daemon.
Fix this by
- making `sqlite-write-daemon` authoritative wrt connecting to the daemon.
- launching the daemon earlier in the setup process.
Reviewed By: jberdine
Differential Revision: D17204002
fbshipit-source-id: 23d452fac
Summary:
It adds `typ` field in Sil.Load. The field will be used by the analyzer in the following diffs.
Motivation: Interbo generates a symbolic value when evaluating expressions including parameter symbols. At that time, it is done with depending on their types, e.g., an integer, a pointer to struct or a pointer to array. Without the type, it is hard to generate a correct symbolic value that will be instantiated later in call sites. Thus, evaluating RHS of the load statement, the type of RHS is better to be given.
Reviewed By: jvillard
Differential Revision: D17163350
fbshipit-source-id: f7f0f1429
Summary:
It uses inline record for Sil.Load and Sil.Store for preparing the
following extention.
Reviewed By: dulmarod
Differential Revision: D17161288
fbshipit-source-id: 637ea7bfa
Summary: It prints non-verbose program variables in the report.
Reviewed By: ngorogiannis
Differential Revision: D17163943
fbshipit-source-id: c3f3c2887
Summary:
An exception thrown during capture/analysis may leave the daemon
running. Kill it even when one is thrown.
Reviewed By: martintrojer
Differential Revision: D17181090
fbshipit-source-id: a7b002f23
Summary: With this predicate we are able to check for static global variables in AL.
Reviewed By: ddino
Differential Revision: D17164848
fbshipit-source-id: a3d10598c
Summary:
We currently use storage_class only for checking is_static, adding the flag instead in the plugin to improve perf by avoiding string comparisons.
update-submodule: facebook-clang-plugins
Reviewed By: ngorogiannis
Differential Revision: D17156173
fbshipit-source-id: 2b84a0b84
Summary:
This abstraction was not always used consistently.
Its usage made more sense when it supported both present annotations and
optional annotation (which got removed in previous diff).
The rought semantic of that was "what is the inferred type for such and
such value (variable or expression) in typestate". So it is not really
_annotation_ in first place, it is more like "what we inferred about
nullability given annotations, known special cases, and current sybmolic
execition state".
Let's explicitly rename `map` to `is_nullable`. If/when we need to
enhance this further (and we likely will), we will do it accordingly.
Reviewed By: jvillard
Differential Revision: D17153434
fbshipit-source-id: 3c85b56df
Summary:
`Present` annotation was an experiment made many years ago that never
got into real usage. The idea was to annotate Optional<> types with
Present, which means that it is safe to call get().
We don't plan to support `Present` annotation for optional types in the
near future.
Support of `Present` annotation requires extra levels of abstraction
that make the changing the behavior and introducing new features harder.
A lot of checks for nullability are written in generic way so they also
check for presense.
Getting rid of that will allow us to simplify our
work for introducing new semantics for nullsafe.
Reviewed By: ngorogiannis
Differential Revision: D17153432
fbshipit-source-id: c5ea9bdf1
Summary:
Implementation of write-serializer for Sqlite. Points of note:
- A Unix socket is used for communication. This avoids buffer-size limitations, as the objects we send for writing may exceed said limits.
- No daemon is used if running under buck or in genrule mode, as this usually means a single-threaded job capturing into the DB.
- When the daemon is running, read-only access is *not* enforced for other processes. This makes starting and stopping the daemon during Infer execution easier and more robust. In WAL mode this should not have any effect on performance.
- This version is not economical with connections, it uses one per query, todo.
Reviewed By: jvillard
Differential Revision: D17077183
fbshipit-source-id: fa9877d6c
Summary: Developing the Sqlite-writer process further, a type `command` is introduced, which will used for sending instructions down a communications channel to the daemon. For now, the commands are interpreted locally.
Reviewed By: skcho
Differential Revision: D16985056
fbshipit-source-id: 2aa20908d
Summary:
Write contention is becoming a problem in parallel capture (eg when make runs with high parallelism) or when analysis writes CFGs to the DB in parallel (eg when analysing blocks in ObC). This is believed to lead to BUSY errors in Sqlite.
This is step 1 of a process where all writes are cordoned-off in one module, and fixing the interface for that module.
Reviewed By: skcho
Differential Revision: D16985034
fbshipit-source-id: 3d7ce381b
Summary:
When running with high parallelism and a large number of insertions in the DB (eg, ObjC analysis with block specialisation), we see MISUSE exceptions thrown by Sqlite **when trying to bind parameters to queries**. It does not always occur, and maybe that's because the check in Sqlite that throws this error is documented as "probabilistic". For the same reason, it is plausible that high parallelism increases the chance of detection.
According to documentation this unequivocally means a bug in our usage of the API (https://www.sqlite.org/rescode.html#misuse), in particular that a parameter is re-bound while the query is running (https://www2.sqlite.org/cvstrac/wiki?p=LibraryRoutineCalledOutOfSequence). I believe this may have to do with `result_fold_rows` (as it's the only one that uses a query that can be continued, and thus misused), but I have not managed to track the bug.
Always resetting the query before using it is a defensive measure that seems to make these errors go away (and turn some of them to BUSY timeouts, which should be addressed by a write serialiser, but in any case it's a more logical state of affairs = higher parallelism means more contention thus possibly timeouts due to lock usage).
Reviewed By: jvillard
Differential Revision: D17147447
fbshipit-source-id: 7ef3cc73f
Summary:
Since it does not make sense to get ranges of non-integer values and
use them as approximate iteration numbers, this diff ignores control
values that only contain non-integer symbols.
Reviewed By: ezgicicek
Differential Revision: D17130967
fbshipit-source-id: f5ba58d52
Summary:
Currently, the specs directory is cleaned after running capture. This means that the `changed-files` are interpreted in the context of the second set of source files. Therefore if a procedure is deleted from the second set of source files, its specs file will not be deleted.
This moves the cleaning of the specs directory to before capture, to avoid this problem.
Reviewed By: ngorogiannis
Differential Revision: D17093980
fbshipit-source-id: e1a8d8a54
Summary: This diff extends size alias domain for keeping one more alias of a Java temporary variable.
Reviewed By: ezgicicek
Differential Revision: D16984082
fbshipit-source-id: 244bbd0ee
Summary: This diff ignores boundends when getting the value range.
Reviewed By: ezgicicek
Differential Revision: D17114363
fbshipit-source-id: cca8745e3
Summary: Like we removed empty edges from the `pre_heap` in D16419183, let's do the same to `post_heap`.
Reviewed By: skcho
Differential Revision: D17111336
fbshipit-source-id: c35fcbabb
Summary:
Before this diff we would record when some values came from the "address
of" logical variables. This makes no sense and also was incorrectly
marking these addresses as "written to" when they appeared in the post
of a procedure, because their attributes weren't empty (they had the
"address of stack variable" attribute).
Reviewed By: ngorogiannis
Differential Revision: D17131210
fbshipit-source-id: 6cc3c465a
Summary: When a positive bound is expected, min(1,x) can be simplified to 1.
Reviewed By: ezgicicek
Differential Revision: D17091884
fbshipit-source-id: 3a89a44fa
Summary:
This did not work. One can not create a param that depends on another param (dynamic!) value
```
infer --dynamic_dispatch
/Users/mityal/infer/infer/bin/infer: unknown option '--dynamic_dispatch'.
```
No info in the manual:
```
find . -name "*.txt" | xargs grep "dynamic"
```
Reviewed By: jvillard
Differential Revision: D17113568
fbshipit-source-id: 87d0a18ba
Sungkeun Cho
Nikos Gorogiannis
Mitya Lyubarskiy
Fabio Milano
Phoebe Nichols
Dulma Churchill
Ezgi Çiçek
Jules Villard