Summary:
This change is what makes the annotation graph a _graph_.
Now we can detect places when adding one annotation causes an issue that can be
fixed by adding another annotation.
Reviewed By: artempyanykh
Differential Revision: D24650979
fbshipit-source-id: b8452b822
Summary:
In the previous diff we introduced
AnnotatedNullability.is_annotatable_as_nullable method.
Lets now use it in all places where we issue ProvisionallyNullable
annotation.
This will lead to more precise nullability graph (without attempts to
annotate primitives).
Reviewed By: artempyanykh
Differential Revision: D24650951
fbshipit-source-id: 8ea0bb97d
Summary:
This change is on par with the logic that we already have for methods
and method params.
In this logic, we explicitly distinct class under analysis & the
external class when fetching AnnotatedNullability (we needed this to support
various Nullsafe modes as well).
Here we use the same approach for fields.
NOTE: this is not intended to work with nested classes just yet.
Reviewed By: artempyanykh
Differential Revision: D24650934
fbshipit-source-id: f555bcc3f
Summary:
:
New flag (equivalent to --clang-biniou-file) to pass in AST to
frontend.
Passing in json files has the big advantage of emitting line numbers
on frontend AST errors.
Reviewed By: jvillard
Differential Revision: D23814358
fbshipit-source-id: 0ad0452ff
Summary: Cleanup `Typ` by moving all constant types to `StdTyp`. Also remove `Typ.typ` as it's just `Typ.t` now.
Reviewed By: jberdine
Differential Revision: D24620397
fbshipit-source-id: 4764f87ef
Summary:
Now we have all pieces of information needed to build the annotation
graph (to be finished as a follow up).
This diff utilizes the same approach that is done when we calculate node
promotions:
1/ AssignmentRule and DereferenceRule know that some issues are related
to provisional annotations and expose this information.
2/ ClassLevelAnalysis collects all the issues, extract violations from
them, and outputs them.
Next step will be changing the output to the meta-issue printing the
annotation graph in json.
Reviewed By: artempyanykh
Differential Revision: D24621410
fbshipit-source-id: c240da3aa
Summary:
In the previous diffs, we introduced
AnnotatedNullability.ProvisionallyNullable. This is a symmetric change
introducing the same for Nullability.t
Note how ProvisionallyNullable is made `is_nonnullish`. This means that
if we run nullsafe in --nullsafe-annotation-graph mode, the following
should start happening:
1/ A lot of new issues will be recorded - every time a local method or
non-null param is dereferenced etc.
2/ But all of those new issues will be filtered by corresponding Rules
(e.g. AssignmentRule). So those issues will not manifest to user-visible
errors. However, now we are capable to see and analyse those hidden
issues in ClassLevelAnalysis. This is exactly what we will be doing in
follow up diffs.
Note that the place of ProvisionallyNullable in the hierarchy is
somewhat arbitraily. It is important to make it less pri then Nullable -
but when it comes to comparing with other "nonnullish" modes - we can
tweak the behavior later on.
Reviewed By: artempyanykh
Differential Revision: D24621411
fbshipit-source-id: 3b99e5e55
Summary:
The fact that we did not preserve all joins (and used only the first
one) was a shorcut since the origin is used only for reporting, and
reporting the info about left joinee is enough for practical purposes.
Hovewer, to support annotation graph, we need all joinees.
This diff is a no-op since we use only the first one currently.
Reviewed By: artempyanykh
Differential Revision: D24621412
fbshipit-source-id: 8fe1174e7
Summary:
This was perhaps needed at some point, but now there is no need in this.
See the next diff that refactors InferredNullability so we store all
joinee results there.
Reviewed By: artempyanykh
Differential Revision: D24621413
fbshipit-source-id: d6f406b87
Summary:
This is the basic building blocks for the future annotation graph. This
diff introduces the first abstraction to be iterated on.
Reviewed By: artempyanykh
Differential Revision: D24621414
fbshipit-source-id: 19acdf216
Summary:
Before we were creating a fresh internal value when we were constructing `folly::Optional`. This diff models `folly::Optional` constructor more precisely by copying the given value.
There was also a missing dereference in the model of `value_or`
Reviewed By: jvillard
Differential Revision: D24621016
fbshipit-source-id: c86d3c157
Summary:
The global type environment is loaded in all analysis workers, so it is best to minimise its memory footprint. `MaxSharing` does a great job at this but
- it is very slow
- it may be involved in observed segfaults, since it uses potentially unsafe operations
This diff replaces `MaxSharing` with a post-facto poor-man's hashcons pass through the parts involved in a java type environment. It is not as efficient as `MaxSharing` at reducing footprint, but it's much faster.
Reviewed By: jberdine
Differential Revision: D24590400
fbshipit-source-id: c37100325
Summary:
Namely `enumerateObjectsUsingBlock` which takes a collection and a block as an arg and the iterates over the collection and applies the block to each element of the collection.
This is a common way to iterate over Objc collections, so let's add a model for it.
Reviewed By: skcho
Differential Revision: D24604590
fbshipit-source-id: 1ceeb4b40
Summary:
The autorelease pool size checker increases the size when an non-arc-compiled function calls
arc-compiled function. However, if the callee is declared in arc-compiled code and its body is not
actually captured or compiled, we should not increase the autorelease pool size.
Reviewed By: ezgicicek
Differential Revision: D24569661
fbshipit-source-id: 2fd707096
Summary:
This diff revises the translation of message expression's arguments in ObjC frontend. In the
frontend, it massages the arguments when calling a static method, so the class or object value is
not given to the static method as the first parameter.
The problem is that it used a raise-exception-and-catch way to detect where we remove the first
parameter. This way of using an exception is not only hard to understand, but also incorrectly
removed the first parameter, with breaking abstract semantics sometimes. (See the added test.) This diff
avoids using the exception.
Reviewed By: jvillard
Differential Revision: D24565513
fbshipit-source-id: 0a84ca394
Summary:
The `make clean` did not remove objects and dot files, so
```
infer/tests/codetoanalyze/objc/frontend$ make test
infer/tests/codetoanalyze/objc/frontend$ make clean
infer/tests/codetoanalyze/objc/frontend$ make test
```
the second `make test` did nothing. This diff adds additional regular
expressions to clean all objects and dot files generated.
Reviewed By: ngorogiannis
Differential Revision: D24566169
fbshipit-source-id: b8c50c922
Summary: This diff fixes on-demand symbolic value generation of a class that inherits NSEnumerator.
Reviewed By: ngorogiannis
Differential Revision: D24504955
fbshipit-source-id: bcb20e8aa
Summary:
This diff replaces overridden method calls in ObjC when possible, ie the first parameter of the
method has a sub-class type of the method's class. For example,
when `MyEnumerator` is a sub-class of `NSEnumerator` and there is overridden `nextObject`,
```
[my_enumerator nextObject]
```
in Sil, it was translated to like
```
NSEnumerator.nextObject(my_enumerator : MyEnumerator*)
```
and the analyzer missed the overridden method. This diff replaces the function call to
```
MyEnumerator.nextObject(my_enumerator : MyEnumerator*)
```
Reviewed By: ezgicicek
Differential Revision: D24477290
fbshipit-source-id: 6842a76f8
Summary: Model `folly::Optional::value_or(default)` to return value if not-empty and `default` if empty.
Reviewed By: jvillard
Differential Revision: D24539456
fbshipit-source-id: cc9e176cc
Summary: Can be useful, especially to dump all the summaries as json.
Reviewed By: skcho
Differential Revision: D24504253
fbshipit-source-id: 845e7d657
Summary:
Emit the crucial parts of Pulse summaries as json to enable
post-processing by external tools. Stop somewhat arbitrarily at some
datatypes that are just emitted as "opaque" values.
For example:
```
$ infer debug --procedures --procedures-summary-json --select 0
[[["pulse",[["ContinueProgram",{"post":{"heap":[["v3",[[["Dereference"],["v4","_"]]]],["v7",[[["Dereference"],["v3","_"]]]]],"stack":[[["ProgramVar",{"plain":"return","mangled":null}],["v7","_"]]],"attrs":"_"},"pre":{"heap":[],"stack":[],"attrs":"_"},"skipped_calls":"_","path_condition":"_"}],["ContinueProgram",{"post":{"heap":[["v3",[[["Dereference"],["v4","_"]]]],["v8",[[["Dereference"],["v3","_"]]]]],"stack":[[["ProgramVar",{"plain":"return","mangled":null}],["v8","_"]]],"attrs":"_"},"pre":{"heap":[],"stack":[],"attrs":"_"},"skipped_calls":"_","path_condition":"_"}]]]]]
```
Reviewed By: ezgicicek
Differential Revision: D24503387
fbshipit-source-id: 9bd08e93b
Summary:
Output summaries in json format, so that other tools can exploit the
results of infer without having to be written inside infer itself.
For now the json for a summary is just one line saying "opaque" :)
Set up the infra to generate (yo)json automatically using
ppx_yojson_conv. See it in action in the next diff.
Reviewed By: ezgicicek
Differential Revision: D24503343
fbshipit-source-id: e24a2fff3
Summary:
- output the "menu" of the interactive mode on stderr instead of stdout
so that we can pipe the results, eg
`infer debug --procedures --procedures-summary | cat`
This will be more useful when we add an option to output json, as
otherwise the menu pollutes the json.
- Allow "--select" to work for infer-debug too:
`infer debug --procedures --procedures-summary --select 0`
Reviewed By: da319
Differential Revision: D24503301
fbshipit-source-id: d7fb4b713
Summary:
This diff revises `nextObject` model to handle multiple symbolic enumerators. Instead joining the
symbolic offsets of them, which sometimes introduces top, it sums the offsets. This is a sound &
conservative semantics since they are all non-negative integers.
Reviewed By: ezgicicek
Differential Revision: D24474513
fbshipit-source-id: 6707aa907
Summary:
This diff revises memory model of enumerator in ObjC to enable passing it as a parameter.
The cost checker was not able to analyze a function precisely when it gets an enumerator as a
parameter because the offset of an enumerator was available only when the analyzer knew the correct
relation between the enumerator and an array.
This diff simplifies the enumerator to have a similar value with `array->elements`, so its offset can
be taken without the relation between enumerator and array to get them.
Reviewed By: ezgicicek
Differential Revision: D24446574
fbshipit-source-id: 27cdc051e
Summary:
This diff adds an option hiding function pointers in costs to users: `cost-suppress-func-ptr` is
true by default.
Reviewed By: ezgicicek
Differential Revision: D24448212
fbshipit-source-id: 88f6b5ea1
Summary:
Before this diff we would just propagate the callee abstract state,
which doesn't make sense in the caller. We could just remove the state
from AbortProgram altogether as Pulse itself doesn't use it, but for now
let's at least make sure it's accurate.
Also needed for upcoming hackathon that will start from Pulse error
specs to try to produce tests :)
Reviewed By: ezgicicek
Differential Revision: D24448073
fbshipit-source-id: 9100b3f79
Summary:
Detect when changed files paths are trying to escape the project root
and try to guess their relative project root (which has to be a parent
of the current one).
This is perhaps a bit too hacky but it works for the case we need it to.
Reviewed By: martintrojer
Differential Revision: D24425427
fbshipit-source-id: 018651740
Summary:
Sometimes you need several project roots (eww), this makes paths make
sense even in that case.
Reviewed By: martintrojer
Differential Revision: D24336244
fbshipit-source-id: f087d533a
Summary:
Don't wait until pre-analysis has completed before updating the task
bar with the current procedure being analysed.
Reviewed By: skcho
Differential Revision: D24418609
fbshipit-source-id: afedaf687
Summary:
Move from Map to SafeInvertedMap:
- joining two branches where only one branch had the variable set to a
given closure or type should *not* keep that information around: now
we correctly get Top instead
- the "Safe" part is an optimisation that doesn't store Top values in
the map, which is important as most values are not closures so we
don't care about storing the fact that we don't know anything about
them
Reviewed By: ngorogiannis
Differential Revision: D24418560
fbshipit-source-id: 0ac701502
Summary:
This diff adds a model for NSFileManager.contentsOfDirectoryAtURL as returning a constant-length
collection.
The analyzer cannot know files in a directory. We have some options to handle such unknown data.
1. Use `Unknown` value, ie `top`
2. Use a symbolic value
3. Use a constant value
We had been used the first option. An upside of this is that the analyzer can remain as sound.
However, a downside of this is the top value can be propagated to other procedures, making their
costs top, thus we may miss some cost changes of them.
The second option is to introduce a symbolic value, ie. that for the number of files. A problem is
that the symbolic value will never be concretized. As a result, the symbol can be propagated to
other procedures, increasing the coefficient of the complexity or making top costs. Note that handling multiple
symbols is somewhat limited in Inferbo's interval domain.
The last option is to introduce a constant value. I think this is the best approach we can take among above.
Even though we may have FNs when there are a lot of files in a directory, we cannot reason or expect about
that at the analysis time anyway.
Reviewed By: ezgicicek
Differential Revision: D24418099
fbshipit-source-id: bf8cf3538
Summary: This diff adds closure symbols to operation/allocation costs, when function pointer is called.
Reviewed By: ezgicicek
Differential Revision: D24308550
fbshipit-source-id: 6c5889d41
Mitya Lyubarskiy
Martin Trojer
Nikos Gorogiannis
Daiva Naudziuniene
Ezgi Çiçek
Sungkeun Cho
Jules Villard