Summary:
public To deal with ObjC nullability and give meaningful error
messages, we introduced the ObjC_NULL attribute in the symbolic execution to
mean that the object carrying the attribute is null because it was the result
of a method call from a null object. However, one cannot add attributes to null,
so we had to delay nullifying the object in order to have the attribute until we
can assign it to a program variable. However, if the temp variable was used in a condition,
we were not taking into account that its meaning is null. This diff addresses that and fixes
many FPs that we have encounter.
Reviewed By: ddino
Differential Revision: D2765167
fb-gh-sync-id: c0878dd
Summary:
public
The contravariant subtyping rule for the PerformanceCritial annotation was meant to document the code but can be very too verbose on exisiting project. It is also not necessary as we can get this annotation from the supertypes. I am disabling it for now, but keep the code in case we want to revive it at some point in the future.
Reviewed By: sblackshear
Differential Revision: D2750212
fb-gh-sync-id: 2424281
Summary:
public
Lines other than the first of multi-line comments in non-ocaml files
were flush right instead of aligned.
Reviewed By: jvillard
Differential Revision: D2739752
fb-gh-sync-id: c85f56e
Summary:
public
It is possible to return null according to
http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html#getResource(java.lang.String).
Also, getResource throws NPE if passed null:
$ cat -n TestClassGetResourceArgument.java
1 import java.net.URL;
2
3 public class TestClassGetResourceArgument {
4
5 static URL testClassGetResourceArgument(Class cls) {
6 return cls.getResource(null);
7 }
8
9 public static void main(String[] args) {
10 System.out.println(testClassGetResourceArgument("".getClass()).toString());
11 }
12
13 }
$ javac TestClassGetResourceArgument.java && java TestClassGetResourceArgument
Exception in thread "main" java.lang.NullPointerException
at sun.misc.MetaIndex.mayContain(MetaIndex.java:243)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:830)
at sun.misc.URLClassPath.getResource(URLClassPath.java:199)
at sun.misc.URLClassPath.getResource(URLClassPath.java:251)
at java.lang.ClassLoader.getBootstrapResource(ClassLoader.java:1305)
at java.lang.ClassLoader.getResource(ClassLoader.java:1144)
at java.lang.ClassLoader.getResource(ClassLoader.java:1142)
at java.lang.ClassLoader.getSystemResource(ClassLoader.java:1267)
at java.lang.Class.getResource(Class.java:2145)
at TestClassGetResourceArgument.testClassGetResourceArgument(TestClassGetResourceArgument.java:6)
at TestClassGetResourceArgument.main(TestClassGetResourceArgument.java:10)
Reviewed By: cristianoc
Differential Revision: D2752301
fb-gh-sync-id: 888baf1
Summary:
public
Remove double negation in test check as per jrm's comment on D2695548.
Reviewed By: jeremydubreil
Differential Revision: D2743862
fb-gh-sync-id: d7cc0d0
Summary:
public
Added special modelling for m.put(k,v) as assigning value v to map m at key k.
The modelling is analogous to the one for containsKey: the variable used to represent m.get(k) is generated, and assigned the value v.
Reviewed By: jberdine
Differential Revision: D2743844
fb-gh-sync-id: 56d3581
Summary:
Change eradicate handling of complex values so that an unknown function that
has an existing mapping to Undef is treated as if there was no existing
mapping.
Without this change, joining control-flow branches where one called a function
and the other did not resulted in a mapping to Undef. Later calls to the
function would then reuse the Undef mapping.
public
Reviewed By: cristianoc
Differential Revision: D2695548
fb-gh-sync-id: ab69c47
Summary:
public
After supporting template classes and template functions, it's time
to support template methods (they are very similar to template functions)
Reviewed By: dulmarod
Differential Revision: D2734807
fb-gh-sync-id: 41c7f96
Summary:
public The ivar corresponding to the property is only available in the ast when the
implementation of the peroperty is available. Otherwise we add an ivar with the correct type
and the default name to the tenv and use it in the getter (and later in the setter).
This was not causing crashes because the generated code was swallowing the Missing_fld exception.
Now it flags it.
Reviewed By: akotulski
Differential Revision: D2734217
fb-gh-sync-id: 21c62af
Summary:
public
Conditional operator in C++ allows to return lvalues as a result of the operator.
Make infer frontend smart enough to detect when that happens and treat this
case correctly
Reviewed By: ddino
Differential Revision: D2729468
fb-gh-sync-id: f4a110d
Summary:
public This puts the bugs found with the checker strong delegate to a dummy method.
The error message will appear in the line of the class implementation definition, since the properties
are likely to be defined in the h file, and getting the reporting in a file that is not the current is
difficult.
Reviewed By: ddino
Differential Revision: D2718016
fb-gh-sync-id: 66273a4
Summary:
public
Read definitions of C++ function template specializations. Infer still doesn't work correctly for template methods, it will be addressed later
Reviewed By: dulmarod
Differential Revision: D2707411
fb-gh-sync-id: 6072796
Summary: public This only supports parameters for now, but should be easy to extend to return values and fields. The work of this diff is all in the translation--the task of finding annotations and doing the actual checking is handled by existing code.
Reviewed By: akotulski
Differential Revision: D2706791
fb-gh-sync-id: 0d706a8
Summary: public
The method `android.view.View.findViewById` and should not be run performance critical parts of the code like scrolling.
Reviewed By: sblackshear
Differential Revision: D2698196
fb-gh-sync-id: 2716ad7
Summary: public
Add qualifiers to global varible names. It affects both
normal global vars and class static fields
Reviewed By: dulmarod
Differential Revision: D2699927
fb-gh-sync-id: 1471faf
Summary: public
`this` can't be null in C++ methods, make backend aware of it.
Behavior for other languages remains the same
Reviewed By: dulmarod
Differential Revision: D2668945
fb-gh-sync-id: c85acbf
Summary: public
Infer gets confused with this cast. It happens when objects try
to access superclass field/method, but we shouldn't change type in
this case (for the sake of backend)
Reviewed By: dulmarod
Differential Revision: D2663905
fb-gh-sync-id: bbf1cb2
Summary: public
I realized that this code was returning false for `android.content.Context <: android.content.Context`.
Reviewed By: cristianoc
Differential Revision: D2699112
fb-gh-sync-id: 4c01c42
Summary: public
This allows to run the checker and get feedback about potential expensive call stacks without having to annotate first all the methods that are overriding PerofrmanceCritical-annotated methods
Reviewed By: cristianoc
Differential Revision: D2693556
fb-gh-sync-id: cb60278
Summary: public Translate template instantiations exported by clang.
There is no need to deal with templated code - clang creates one class
for each implementation.
Reviewed By: dulmarod
Differential Revision: D2686269
fb-gh-sync-id: 9249a00
Summary: public
Support MaterializeTemporaryExpr which happens often in real life C++.
For example, it will happen in this code:
std::vector<int> v;
v.push_back(1);
// it's because std::vector<int>::push_back(const int &)
Strategy is to create variable that will store value of init expression (to provide storage)
and then return variable as a result of an expression
Reviewed By: ddino
Differential Revision: D2674340
fb-gh-sync-id: 077ed6a
Summary: public
Translate C++ overloaded operator calls. AST of their children looks slightly differently
which means that we have to be more permissive in params_trans.exps.
Difference:
CXXMemberCallExpr:
MemberExpr:
'ThisExpr' (it's part of method decl ref evaluation)
MethodDeclRef
Param1
Param2
...
CXXOperatorCallExpr
MethodDeclRef/FunctionDeclRef
'ThisExpr' (it's part of parameters list evaluation)
Param1
Param2
...
Reviewed By: dulmarod
Differential Revision: D2679503
fb-gh-sync-id: 1437f73
Summary: public
Add support for translation and calling c++ static methods.
They can be called in two ways:
ClassName::method()
classInstance.method()
Both of them have the same meaning, but AST produced is different
Reviewed By: dulmarod
Differential Revision: D2636489
fb-gh-sync-id: 9294a3f
Summary: public
Some more examples to explain the behaviour of the type checker with inheritance
Reviewed By: cristianoc
Differential Revision: D2639908
fb-gh-sync-id: d038061
Summary: public
The static and global variables used in blocks don't appear in the ast as captured.
We need them however to try and find retain cycles involving those variables.
This diff adds a way of collecting the static variables used in blocks and treat them
like we treat other captured variables to find retain cycles.
Reviewed By: ddino
Differential Revision: D2663727
fb-gh-sync-id: d5b44ec
Summary: public
The classes `java.util.zip.{Inflater/Deflater}` where not modelled as resources. In practice, bad memory leak can happen using these classes and forcing the call to `end()` can help to avoid waisting native memory.
Reviewed By: sblackshear
Differential Revision: D2661249
fb-gh-sync-id: 1e33316
Summary: Add possibility of throwing IOException to model of
java.nio.channels.FileChannel.tryLock, and add test case.
public
Reviewed By: cristianoc
Differential Revision: D2658203
fb-gh-sync-id: 9ca9c02
Summary: public Fix oversight where fields of base classes were
not exported.
Reviewed By: dulmarod
Differential Revision: D2652218
fb-gh-sync-id: 75b93ed
Summary: Add models of the java.nio.channels.FileChannel.tryLock methods which can
return null according to the java docs.
public
Reviewed By: sblackshear, cristianoc
Differential Revision: D2650050
fb-gh-sync-id: ae6c8ce
Summary: public This diff changes the way we treat enums in Infer.
1. The semantics of the translation is now correct, it was a bit incorrect before.
2. We don't add the enum types to the tenv anymore, which saves a lot of disk space
and avoids errors in the backend dealing with the enum type.
Reviewed By: akotulski
Differential Revision: D2641903
fb-gh-sync-id: 6295e5f
Summary: public
This adds the following subtyping rules:
- methods that are not annotated with Expensive cannot be overwritten by a method annotated with Expensive
- methods annotated with PerformanceCritical must be overwitten by method annotated with PerformanceCritical
Reviewed By: cristianoc
Differential Revision: D2636076
fb-gh-sync-id: eb616c9
Summary: public
Just works by running the analysis bottom-up and promoting any method as virtually annotated with `Expensive` whenever one of its callee is annotated with `Expensive`
Reviewed By: cristianoc
Differential Revision: D2635242
fb-gh-sync-id: 4401be6
Summary: public
C++ allows to have one variable declared+initialized as a condition statement.
Handle these cases properly for `if` and `while` statements.
Reviewed By: dulmarod
Differential Revision: D2625774
fb-gh-sync-id: bac95b8
Summary: public
This is an initial version of the Expensive checker which only report violations on direct calls. The main objective is to setup all the files for this new checker.
The next steps are:
1) run the checker in interprocedural mode
2) Save in the summary of a method foo() the annotation attribute Expensive if a direct callee of foo is annotated with Expensive
3) Check that Expensive is enforced by subtyping, i.e. check that non-expensive method cannot be overwritten by a method annotated with Expensive
Reviewed By: cristianoc
Differential Revision: D2629947
fb-gh-sync-id: 0e06f85
Summary: public
Translate CXXConstructExpr that are parts of variable initialization.
Reviewed By: dulmarod
Differential Revision: D2570750
fb-gh-sync-id: 708a457
Dulma Rodriguez
jrm
Josh Berdine
Dino Distefano
Cristiano Calcagno
Sam Blackshear
Andrzej Kotulski