Summary:
According to Java semantics, they are always non-null.
Internally they are represented as static fields, so they have
DeclaredNonnull nullability, which means NullsafeStrict mode would
refuse to use them without strictification.
Lets teach nullsafe that these guys are non-nullables.
See also FN in test case.
Reviewed By: ngorogiannis
Differential Revision: D19024547
fbshipit-source-id: 8c120fa50
Summary:
- Remove `to_flat_string` as there is `get_field_name` that unambiguously does the same thing.
- Make `pp` print only the field in all languages.
- Fix `to_full_string` so that it has unified behaviour across java/clang and so that it doesn't print `class Foo.x`, but rather `Foo.x`.
Reviewed By: ezgicicek
Differential Revision: D18963033
fbshipit-source-id: e2c803c7d
Summary:
Remove Clang and Java submodules of Typ.Fieldname. They are unnecessary and they reflect a fake dichotomy: there is only one fieldname type. To distinguish between fields of Java classes and other C constructs, there is a helper function provided, but the idea is simple: obtain the class type the field belongs to, and check if it's a Java class.
This diff still preserves behaviour, but removes as many functions as possible from the interface, to leave a small surface.
Reviewed By: mityal
Differential Revision: D18962423
fbshipit-source-id: ffe6933ee
Summary: Unify treatment of Java and Clang fieldnames. Now a field is a struct with a class type-name and a string-field name. This diff is still behaviour preserving.
Reviewed By: jvillard
Differential Revision: D18953549
fbshipit-source-id: 8cae0d104
Summary: This function allows any string, and in particular empty class names. As a first step eliminate it in favour of a function that forces the caller to specify distinct class and field names. It turns out that the frontend already has them, so it saves effort along the way.
Reviewed By: jvillard
Differential Revision: D18953136
fbshipit-source-id: ff3cdfda5
Summary:
In order to handle the example added:
changed domain of `MethodCalled`
from `CreatedLocation -> (IsBuildCalled X IsChecked X Set(MethodCall))`
to `(CreatedLocation X IsBuildCalled) -> (IsChecked X Set(MethodCall))`
This avoids joining of two method calls where one is build-called and the other is not, e.g.,
```
if(b) {
o.build();
} else {
// no build call
}
```
changed domain of `NewDomain`
from `Created X MethodCalled`
to `(Created X MethodCalled) X (Created X MethodCalled)`
One is for no returned memory and the other is returned memory. This keeps precision some join
points of branches, e.g.,
```
if(b) {
return;
} else {
// no return
}
```
Reviewed By: ezgicicek
Differential Revision: D18909768
fbshipit-source-id: c39d1a1ef
Summary:
The `Typ.FIeldname` module has many issues. Among those:
- It has 5 different string/printing functions and most of them do radically different things in Java and in Clang.
- There is no type safety: creating a Clang field and calling a Java function on it will lead to a crash (`rindex_exn` etc, there are usually no dots in Clang fields).
- It uses a single string for Java fields, containing the package, the class and the field, e.g., `java.lang.Object.field`. This is wasteful, because
- there is no sharing of strings for packages/classes, and,
- string operations need to be performed every time we need the field or the class or the package alone.
This diff preserves the behaviour of the module's interface, so the API problems remain.
However, by using a saner representation for Java fields we can get small performance and large memory gains (the type environment in Java is much smaller, about 30-40%).
In addition, many functions on clang fields would previously do string manipulations (look for `.` and split on it) before returning the final field unchanged -- now they use the type of the field for that.
Reviewed By: jvillard
Differential Revision: D18908864
fbshipit-source-id: a72d847cc
Summary:
This diff enables parsing and auto-formatting documentation
comments (aka docstrings).
I have looked at this entire diff and manually made some changes to
improve the formatting. In some cases it looked like it would take too
much time, or benefit from someone more familiar with the code doing
it, and I instead disabled auto-formatting docstrings in those files.
Also, there are some source files where the docstrings are invalid,
and some where the structure detected by the parser appears not to
match what was intended. Auto-formatting has been disabled for these
files.
Reviewed By: ezgicicek
Differential Revision: D18755888
fbshipit-source-id: 68d72465d
Summary:
- Unify treatment of modelled and annotated executors by making things go through attributes.
- Add a return attribute to summaries, so that we can track flows of thread guards/executors/future stuff through returned values.
- Dispatch modeled functions to model summaries.
This will help in following diffs where runnables will also go through attributes.
Reviewed By: skcho
Differential Revision: D18660185
fbshipit-source-id: e26b1083e
Summary:
Some field types of structs are missing in Java. The reason is:
* When capture, empty struct types are added without their fields.
* The empty struct types are overwritten to the global tenv when merging all tenvs.
As a fix, this diff add a boolean field, `dummy`, in `Typ.Struct.t`, then avoids that non-dummy types are replaced by dummy types.
Reviewed By: ngorogiannis
Differential Revision: D18657323
fbshipit-source-id: 4a263f8e7
Summary: Another dead flag that one could mistakenly think is accurate.
Reviewed By: dulmarod
Differential Revision: D18573925
fbshipit-source-id: 129a9cff5
Summary:
This diff adds semantics of Java function calls of enum `values` inside class initializers.
* Java class initializer function initializes a specific field `$VALUES`, which points to the list
of enum values.
* The `values` function of enum class returns the value of `$VALUES`.
The problem is when the `values` function is called inside the class initializer, for example:
```
enum Color {
RED,
GREEN,
BLUE;
static {
for (Color c : Color.values()) {}
}
}
```
This introduces a recursive dependency: the class initializer calls `Color.values` and the function
returns `Color.$VALUES` the value of which should be initialized in the class initializer.
To address the problem, this diff finds the value of `$VALUES` in its abstract memory when
`values` is called inside the class initializer.
Reviewed By: ezgicicek
Differential Revision: D18349281
fbshipit-source-id: 21766c20f
Summary: Follow ups will include error messaging that makes the choice clear
Reviewed By: artempyanykh
Differential Revision: D18347664
fbshipit-source-id: b6f005726
Summary: `Str.regexp_string` should be used to find a method name instead of `Str.regexp`.
Reviewed By: ezgicicek
Differential Revision: D18136598
fbshipit-source-id: c4b56dd64
Summary:
My spidey senses were tingling. Next diff uses the `pp` functions
everywhere it was kind of obvious how to change the code to do so. It
doesn't improve perf but is less clowny that way. It might lessen memory
pressure since allocating strings is expensive and this code was doing a
lot of it.
Reviewed By: ngorogiannis
Differential Revision: D17450324
fbshipit-source-id: 632cee584
Summary:
Reduces the size of the `tenv` by sharing values as most as possible, in an untyped - but supposedly safe - way, by using black magic on objects.
Can be reused for other things later.
Reviewed By: ngorogiannis
Differential Revision: D15855870
fbshipit-source-id: 169a4b86b
Summary:
Using `Marshal.to_string` to create SQLite values used in comparisons is brittle as there is no guarantee that it will return the same value for structurally equal values.
When adding sharing, this will definitely break.
From the SQLite queries I found, only `SourceFile` and `Procname` are used in comparisons.
I haven't tested performance.
It shouldn't change anything for `SourceFile` as there is no possible sharing.
It shouldn't change much for `Procname` as they are pretty small anyway.
Reviewed By: ngorogiannis
Differential Revision: D15923122
fbshipit-source-id: ce4af1fe3
Summary:
One "interesting" feature of the approach of merging the captured targets in Java, is that we union their type environments, as opposed to store partial tenvs together with each source file, which is the case for Clang.
This means
- the final global type environment is potentially huge because it contains all the types in all targets.
- all analysis workers start by loading that tenv in memory, meaning we consume `|size of tenv| x #cpus` memory, which can tip the balance towards OOMs
This diff attempts to economise on global tenv size. This is done by increasing sharing which is then preserved by marshalling. It's done in a brute force way, with hashtables for each struct component, and is not fully effective due to the recursion amongst types and types names, as well types appearing inside other constructs such as procnames.
This is done when calling `Tenv.store` so that
- the computation can be parallelised somewhat (capture is parallel, merging is not)
- buck caching will benefit from smaller tenvs.
This saves about 24% of total memory devoted to the type environment.
Reviewed By: mbouaziz
Differential Revision: D15840054
fbshipit-source-id: 6f03be1a4
Summary:
Instrument SIL according to TOPL properties. Roughly, the
instrumentation is a set of calls into procedures that simulate a
nondeterministic automaton. For now, those procedures are NOP dummies.
Reviewed By: jvillard
Differential Revision: D15063942
fbshipit-source-id: d22c2f6fa
Summary:
This messes with the deduplication heuristic when templated function
names show up in the error messages, since the heuristic demands that
the error messages are the same.
Reviewed By: mbouaziz
Differential Revision: D15374333
fbshipit-source-id: 70232d254
Summary: No reason to use custom function name and not implement `Hashable`.
Reviewed By: mbouaziz
Differential Revision: D15097603
fbshipit-source-id: 7303fc15e
Summary:
TOPL properties are essentially automata, which will be modeled as a set
of procedures. The code-to-analyze makes calls into these procedures,
thereby driving the automaton. In this commit, these calls do not do
anything. The point is to prepare the hook-up mechanism.
Reviewed By: jvillard
Differential Revision: D14819650
fbshipit-source-id: d95ecdb3d
Summary:
The previous message formatting had regressed and produced non-sensical messages.
More importantly, remove template parameters from error messages to
trigger the heuristic in `InferPrint` that deduplicates errors that are
on the same line with the same error type and message. Without this we
get hundreds of reports that correspond to as many instantiations of the
same code.
Reviewed By: ngorogiannis
Differential Revision: D14747979
fbshipit-source-id: 3c4aad2b1
Summary:
Add an option to specify some classes that we really want to warn about
with the liveness checker, even when they appear used because of the
implicit destructor call inserted by the compiler.
Reviewed By: mbouaziz
Differential Revision: D13991129
fbshipit-source-id: 7fafdba84
Summary: It extends the abstract location for C string length, i.e., the first index of the null character in character array.
Reviewed By: mbouaziz
Differential Revision: D13634241
fbshipit-source-id: d2727d5f5
Summary:
In ObjC there are no access modifiers. The strongest alternative is to put methods in the implementation but omit them from the interface declaration.
Put exported ObjC methods in their own field in the class structure and use that in RacerD to decide whether to report on the method.
Reviewed By: mbouaziz
Differential Revision: D13597504
fbshipit-source-id: c4a3d2705
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: The aligned width of bool should be 1-byte, while the range of bool [0,1].
Reviewed By: jvillard
Differential Revision: D12932394
fbshipit-source-id: be1a5d6d1
Summary: To avoid reporting on private methods, ignore those starting with underscore. Other cleanups.
Reviewed By: jvillard
Differential Revision: D10558970
fbshipit-source-id: 0572f1e70
Summary: This diff changes pp of binary operation condition in order to avoid a `make test` failure. For the same `uint64_t` type, it is translated to `unsigned long long` in 64bit mac, but `unsigned long` in 64bit linux, which made a `make test` failure.
Reviewed By: mbouaziz
Differential Revision: D10459466
fbshipit-source-id: 449ab548e
Nikos Gorogiannis
Mitya Lyubarskiy
Sungkeun Cho
Josh Berdine
Jules Villard
Dulma Churchill
Radu Grigore
Mehdi Bouaziz
Ezgi Çiçek
Jeremy Dubreil
David Lively
Nikos Gorogiannis