Summary:
The philosophy of the tracing mode reporting is to not report the errors in a method if reaching this error does depend on information that can be false at call site. Typically with:
void foo(Object obj, int x) {
if (x == 3) {
obj.toString();
}
}
it may be that we always call `foo` with a non-null parameter or `x != 3`.
Thechnically, the reporting code matches the pairs of the form (precondition, error) and filtering out the cases where the precondtions was not imposing constraints on the calling context, and report the other cases. So the NPE could be reported in the following case:
void bar() {
foo(null, 3);
}
However, we were missing the case where there was anyway no way to call a method in a safe way, i.e. all the preconditions were of the form: (precondition, error), for example:
void baz(boolean b) {
if (b) {
foo(null, 3);
} else {
foo(null, 3);
}
}
In that case, the summary is of the form
PRE (1): b = false
POST: NullPointerException
PRE (2): b = true
POST: NullPointerException
In which case it is legit to report `NullPointerException` in `baz`.
Reviewed By: sblackshear, jberdine
Differential Revision: D3220501
fb-gh-sync-id: 7fb7d70
fbshipit-source-id: 7fb7d70
Summary: So that we no longer have to run `Tabulation.prop_is_exn` before running `Tabulation.prop_get_exn_name`.
Reviewed By: jberdine
Differential Revision: D3222545
fb-gh-sync-id: a7faa06
fbshipit-source-id: a7faa06
Summary:
As suggested in the discussion https://github.com/facebook/infer/issues/326 this pull request implements
```ocaml
get_overriden_method : Tenv.t -> Procname.java -> Procname.t
```
to get the method of a superclass that is being overridden by a specific java pname.
I thought of unit test this, but unfortunately I wasn't able to figure out how to create the proper context with OUnit2. Perhaps the easiest way to test this will be integration tests.
Feel free to reject the pull request if unit tests are mandatory (or for any other reason, of course).
Closes https://github.com/facebook/infer/pull/341
Reviewed By: jeremydubreil
Differential Revision: D3221254
Pulled By: sblackshear
fb-gh-sync-id: 9c26258
fbshipit-source-id: 9c26258
Summary: Example of dynamic dispatch with interfaces were already working. Adding some tests now so that we don't break this.
Reviewed By: sblackshear
Differential Revision: D3220360
fb-gh-sync-id: 11395dd
fbshipit-source-id: 11395dd
Summary:
I ran perf on rocksdb analysis and found out that ~40% of time is spent inside ocaml GC originating
from Prop.typ_normalize.
After this change, profile shows that GC is ~2% and Prop.typ_normalize takes 50% of the time.
Reviewed By: jberdine
Differential Revision: D3219113
fb-gh-sync-id: 27c34d9
fbshipit-source-id: 27c34d9
Summary: Provide possibility to replace clang internal headers path if they are overwritten by `-isystem`. User needs to specify path to wrong headers to be replaced with infer's clang.
Reviewed By: martinoluca
Differential Revision: D3212850
fb-gh-sync-id: be3d51c
fbshipit-source-id: be3d51c
Summary:Open-source clang has caught up a bit with apple's clang, so we don't need to
filter as many compilation flags as we used to.
Reviewed By: akotulski, martinoluca
Differential Revision: D3212553
fb-gh-sync-id: 5638dc8
fbshipit-source-id: 5638dc8
Summary:This enables controlling the encoding chosen by infer via the usual environment
variables. For instance:
```
LC_ALL="C" infer ... # sets LOCALE to "ascii"
LC_ALL="en_US.UTF-8" infer ... # sets LOCALE to "UTF-8"
```
This gives an easy solution to #320: run `LC_ALL="en_US.UTF-8" infer ...`.
Right now the only solution is to edit the Python scripts by hand instead!
Reviewed By: jberdine
Differential Revision: D3207573
fb-gh-sync-id: 62d5b98
fbshipit-source-id: 62d5b98
Summary:Since we never build inside facebook-clang-plugins/ when we are inside a
release tree of infer, cleaning there would bork the tree. Then one would have
to unpack the release tarball again to unbork it. Moreover, it's very unclear
what's happening when you hit this issue. See #346
Reviewed By: jberdine
Differential Revision: D3207508
fb-gh-sync-id: 065a7f0
fbshipit-source-id: 065a7f0
Summary:stdlibc++ headers didn't like the fact that hash<unique_ptr> didn't have defined operator() directly.
Do that and provide empty body. Keep inheritance in case it helps compilation to succeed.
Reviewed By: dulmarod
Differential Revision: D3207721
fb-gh-sync-id: 8c950da
fbshipit-source-id: 8c950da
Summary:Local variable created by conditional operator translation is now declared in scope of whole
procedure. Semantically there is no difference, hopefuly backend will not complain about this
change. Also, nullifying that variable is deferred to preanalysis instead of calling it manually
Reviewed By: jvillard
Differential Revision: D3155733
fb-gh-sync-id: 6cec8fc
fbshipit-source-id: 6cec8fc
Summary:`exc.output` can be (always is?) `None`. Other places in the code only print
using `traceback.print_exc()` and this was the only place trying to print this
extra info (`git grep CalledProcessError`). This caused `utils.stdout()` to
raise an exception, which was further confusing.
closes#330
Reviewed By: jberdine
Differential Revision: D3203896
fb-gh-sync-id: d2988d8
fbshipit-source-id: d2988d8
Summary:It turns out, apple clang turns off cxx-modules under the hood. Open source clang doesn't do it by default
and we need to do it ourselves.
Reviewed By: jvillard, martinoluca
Differential Revision: D3201604
fb-gh-sync-id: 82cea0f
fbshipit-source-id: 82cea0f
Summary: For performance critical sections of the code, this checker detects memory allocations or calls to methods annotated as expensive. However, such cases of memory allocations or expensive calls are acceptable is occuring in rare cases. This diff adds supports for the "unlikely" branch prediction method and does not track expensive calls in unlikely branches.
Reviewed By: sblackshear
Differential Revision: D3193473
fb-gh-sync-id: ea87e49
fbshipit-source-id: ea87e49
Summary:InferPrint has a special case code path that does not add results_dir to
the specs_library if it is the default. This seems to be unnecessary.
Reviewed By: jeremydubreil
Differential Revision: D3195088
fb-gh-sync-id: 67e968a
fbshipit-source-id: 67e968a
Summary:BinaryConditionalOperator should evaluate condition expression once, but we used to evaluate it twice.
Fix translation to account for it.
Reviewed By: dulmarod
Differential Revision: D3179803
fb-gh-sync-id: a801a7e
fbshipit-source-id: a801a7e
Summary:Improve the error traces so that:
- the error get reported on the first offending call, which is more intuitive for inline comments
- the traces now jump from call location to callee definition and so forth until the end of the call stack
Reviewed By: sblackshear
Differential Revision: D3183756
fb-gh-sync-id: 089ddaf
fbshipit-source-id: 089ddaf
Summary:This diff translate cpp lambdas. For the moment it does not take care of
captured variables. Captured variables will come in the next diff.
Reviewed By: dulmarod
Differential Revision: D3114790
fb-gh-sync-id: bf36450
fbshipit-source-id: bf36450
Summary:Make node ids be `private int` to make sure we don't mix them with random
integers from other sources.
Reviewed By: sblackshear, cristianoc
Differential Revision: D3179670
fb-gh-sync-id: 4bcf4f0
fbshipit-source-id: 4bcf4f0
Summary:This wasn't used anywhere. Frontends that wish to do something like goto can
just set the targets of the goto as successors of the current node, no need for
a special instruction to do that.
Reviewed By: sblackshear
Differential Revision: D3179826
fb-gh-sync-id: 572a6f2
fbshipit-source-id: 572a6f2
Summary:public
When a conditional is the last instruction, there will be a join node leading directly to the exit node.
Some instructions, such as nullification of dead variables, and abstraction, are added to the control flow graph automatically. But, join nodes cannot contain instructions. So when a procedure ends with a conditional, there might be no place to store these instructions.
This diff adds one extra node between the join and the exit node in that situation.
Reviewed By: jvillard
Differential Revision: D3179056
fb-gh-sync-id: 2b9cd7e
fbshipit-source-id: 2b9cd7e
Summary:public
This extends infer/src/Makefile with a mod_dep.dot target that builds a
dot graph of module dependencies.
This also adds ocamldot, which is in the public domain and available
from http://trevorjim.com/projects/ocamldot/ocamldot.tar .
Reviewed By: cristianoc
Differential Revision: D3168488
fb-gh-sync-id: 267fb0e
fbshipit-source-id: 267fb0e
Summary:public
The code:
DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(file)));
creates a resource with `FileInputStream()` and wraps it twice as a field of `BufferedInputStream` and then as a field of `DataInputStream`. Then calling:
in.close();
needs to go down the wrappers hierachy: `DataInputStream.close()` -> `FilterInputStream.close()` which then calls `BufferedInputStream.close()` -> `FilterInputStream.close()` -> `FileInputStream.close()`.
Going down the wrapper was not working before because `FilterInputStream.close()` was only going further when the type of field `in` was `FileInputStream` wheras it should also continue when the type of the field is any subtype of `FilterInputStream`, e.g. `DataInputStream` and `BufferedInputStream` like in the test example. This diff fixes this last aspect.
Reviewed By: sblackshear
Differential Revision: D3174822
fb-gh-sync-id: 3adbb7e
fbshipit-source-id: 3adbb7e
Jeremy Dubreil
Sam Blackshear
Luis Cruz
Andrzej Kotulski
Jules Villard
Dino Distefano
Peter O'Hearn
Dulma Rodriguez
Josh Berdine
Cristiano Calcagno