Summary: Refactor `folly::Optional` models to make them easier to reuse for `std::optional`
Reviewed By: jvillard
Differential Revision: D24760053
fbshipit-source-id: f665e84c8
Summary:
If the issue one of:
- Field Not Nullable
- Field Not Initialized
- Field Overannotated,
we record field_name to .json result.
NoTE: Design choice for representation. For Field Not Initialized and Field Overannotated
this is always internal (relative to the class) field, but for Field Not
Nullable it can be either internal or external. We could have a
structured output, or always output full name. I preferred to output
short name for convenience of the main usacase I am anticipating.
NOTE: not to be confused with the case where the field is nullable but
we e.g. try to dereference it. This is indirectly related to the issue
(can be several such fields for starters) and if we one day output it,
it will be provided in a separate way (similarly to how we output
nullable_methods).
Reviewed By: artempyanykh
Differential Revision: D24730320
fbshipit-source-id: c995ec221
Summary:
We never tested params dependent on things (tested only things dependend
on params).
Reviewed By: artempyanykh
Differential Revision: D24726858
fbshipit-source-id: a0861cfc3
Summary:
Since we report issues types without a prefix (e.g. ERADICATE_) and
with spaces we should also allow for prefix-less issue types in
SuppressLint, so both should work
- SuppressLint("eradicate-field-not-initialized")
- SuppressLint("Field Not Initialized")
Reviewed By: jvillard
Differential Revision: D24760341
fbshipit-source-id: 1590cf6d0
Summary:
There is a feature in Nullsafe that is interfering with "annotation
graph" feature. Because of this we would not detect provisional
violations for misuses of params of equals() (They will be recorded
as user facing rather than provisional issues).
This diff turns this feature off for annotation graph mode.
Reviewed By: artempyanykh
Differential Revision: D24726655
fbshipit-source-id: 4b7577667
Summary:
Virtual "this" invisible param exists in the annotated signature, but
does not exist in some other places, which causes a lot of annoyance in
different places.
This diff does not intend to solve all this, but makes one step forward.
1/ AnnotatedNullability now explicitly distincts normal params and
VirtualThis.
2/ AnnotatedSignature accounts for this via: a) not having redundant
fake annotation points b) having corrent param indices (those were off
by 1 in non-virtul methods).
Reviewed By: artempyanykh
Differential Revision: D24726480
fbshipit-source-id: fdb8bb0fb
Summary: This is a complex enough feature so iterating on it in a safe manner will be useful.
Reviewed By: artempyanykh
Differential Revision: D24725406
fbshipit-source-id: 81b247143
Summary: `folly::Optional::value()` returns a reference, hence an error was shown when the actual value was being accessed. Since `value()` throws an exception in case of `folly::none`, we want to show the error message at the call site of `value()`. We do this by dereferencing the result of `value()` in the model.
Reviewed By: jvillard
Differential Revision: D24702875
fbshipit-source-id: ca9f30349
Summary:
The problem in Reporting.ml:log_issue_from_summary is that it merely
checks the presence of `SuppressLint` annotation on method's body to
decide whether to log or not the issue. This means that regardless of
issue types specified in `SuppressLint`, all issues on such method will
get blocked.
Here we fix that.
Reviewed By: ngorogiannis, mityal
Differential Revision: D24726604
fbshipit-source-id: c9cae3833
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:
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:
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:
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:
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
Summary:
This diff extended the polynomial domain to include symbols for closure calls.
When the closure symbol is added to the polynomial? Unknown closure is called inside a function
like,
```
foo() {
self->closure_field();
}
```
Thus, the cost of `foo` becomes `|self->flosure_field|`, rather than unknown. (Note that this
semantics is added only for autoreleasepool size at the moment.)
When the symbol is instantiated? `foo` is called with correct closure contexts.
```
goo() {
self->closure_field = ^(){ ... };
foo();
}
```
The summary of `goo` will have instantiated summary of the closure.
Reviewed By: ezgicicek
Differential Revision: D23992590
fbshipit-source-id: d1d228403
Summary:
In ObjC, `NSObject.copy` returns the object returned by `copyWithZone:` on the given class. This method must be implemented if the class complies with `NSCopying` protocol. Since we don't have access to `NSObject`'s code, to follow calls into `copyWithZone:`, we replace such `copy` calls with calls to `copyWithZone:` when a) such a method exists in the class and b) the class conforms to `NSCopying` protocol.
This is done in the preanalysis because
- we need to know if there is a `copyWithZone:` method in the class.
- so that other analyses also benefit (as opposed to doing this in cost and inferbo models).
Note that `NSObject` doesn't itself conform to `NSCopying` but all its subclasses must confrom to the protocol and support the same behavior as above.
https://developer.apple.com/documentation/objectivec/nsobject/1418807-copy
Similarly for `mutableCopy` -> `mutableCopyWithZone:` for classes implementing `NSMutableCopying` protocol.
Reviewed By: skcho
Differential Revision: D24218102
fbshipit-source-id: 42900760e
Summary: Model it similar to `NSArray.initWithArray` as copying from the given dictionary elements. Removes a FP as expected.
Reviewed By: ngorogiannis
Differential Revision: D24136868
fbshipit-source-id: ed31c3c8f
Summary:
This diff extends inferbo's domain to include closure values. The goal of this extension is to
follow missing semantics where closures are handled as values, for example, a closure is assigned to
an object field, then it is got later to call.
Due to the bottom-up nature of the analyzer, sometimes we don't know which values are written in a
field, which is the same for the other non-closure values.
Reviewed By: ezgicicek
Differential Revision: D23932186
fbshipit-source-id: 4a575d0de
Summary: Dispatch & function call mechanism was so jumbled up together. Let's refactor it to be cleaner.
Reviewed By: skcho
Differential Revision: D24049889
fbshipit-source-id: 42a218016
Summary:
Take another page from the Incorrectness Logic book and refrain from reporting issues on paths unless we know for sure that this path will be taken.
Previously, we would report on paths that are merely *not impossible*. This goes very far in the other direction, so it's possible we'll want to go back to some sort of middle ground. Or maybe not. See the changes in the tests to get a sense of what we're missing.
Reviewed By: ezgicicek
Differential Revision: D24014719
fbshipit-source-id: d451faf02
Summary: We add a naive model for `forEach` idiom for Java's Iterable and Maps. The model is naive because it doesn't take the cost of the lambda into account. This will be fixed later.
Reviewed By: da319
Differential Revision: D23868203
fbshipit-source-id: 37d169c6f
Summary:
The problem: current enumerator semantics does not work on symbolic enumerator that is given as a
parameter.
Reviewed By: ezgicicek
Differential Revision: D24017059
fbshipit-source-id: 378e75bb0
Summary:
This can be used by additional tooling for further analysis (e.g.
codemods, autofixes, etc).
Reviewed By: ngorogiannis
Differential Revision: D23987694
fbshipit-source-id: b9fa343ac
Summary:
Testing procedure for java source parser
- we can run directly the parser without compiling and analysing the source file
- we add a test file
Reviewed By: ngorogiannis
Differential Revision: D23705199
fbshipit-source-id: 2103c1681
Summary:
This diff keeps closure parameters in closure-specializated procedures.
What the closure-specialization is doing is a propagation of concrete closures. For example, it
translates:
```
foo(block b) {
b();
}
goo() {
foo(^{...});
}
```
to
```
foo_new() {
(^{...})();
}
goo() {
foo_new();
}
```
However, if `foo` addresses `b` as a normal value like
```
foo(block b) {
block c = b;
}
```
this is translated to
```
foo_new() {
block c = b;
}
```
Note that the closure parameter of `foo` is removed, thus `b` becomes a free variable. Not good.
To avoid the situation, this diff keeps the closure parameters intact.
Reviewed By: da319
Differential Revision: D23905580
fbshipit-source-id: 014989fbf
Summary: Subtle false positives and negatives in Hil make Sil preferable. This diff gets rid of the CFG-emulation of Hil, while still using Hil expressions.
Reviewed By: da319
Differential Revision: D23815026
fbshipit-source-id: 731a6d299
Summary: Without curly braces, it is declaration of globals, not fields.
Reviewed By: ezgicicek
Differential Revision: D23866604
fbshipit-source-id: dd685c8d6
Daiva Naudziuniene
Jules Villard
Mitya Lyubarskiy
Artem Pianykh
Ezgi Çiçek
Josh Berdine
Sungkeun Cho
Nikos Gorogiannis
David Pichardie
Martin Trojer