Summary: Adding temporary model for Collections/Map isEmpty() as an attempt to reduce false positives before we provide a full model for Collections.
Reviewed By: ezgicicek
Differential Revision: D26724085
fbshipit-source-id: d3418c173
Summary: `STARVATION` is currently used as a catch-all for several blocking events. This diff splits out `IPC_ON_UI_THREAD`.
Reviewed By: skcho
Differential Revision: D26691868
fbshipit-source-id: 618423793
Summary:
Only register biabduction-style timeouts the first time the function
exe_timeout is called. This avoid getting timeouts in other
long-running analyses. (Especially on windows, where the wall clock is
used.)
Pull Request resolved: https://github.com/facebook/infer/pull/1391
Reviewed By: skcho
Differential Revision: D26780445
Pulled By: jvillard
fbshipit-source-id: 19631b702
Summary:
gcc warnings are more strict starting from gcc10. Not having the const
qualifier triggers an error.
Pull Request resolved: https://github.com/facebook/infer/pull/1393
Reviewed By: skcho
Differential Revision: D26780417
Pulled By: jvillard
fbshipit-source-id: 4507c55eb
Summary:
It removed the result directory without check due to a bug. This diff fixes it to do the check and more careful removement of files.
* Before removing a result directory, it checks
* if the directory is empty: This is ok.
* if the directory is non-empty, but has `results.db`: This is ok, because the directory seems to be an infer's result directory.
* if the directory is non-empty and no `results.db`: This is not ok, so it does not remove the directory.
Reviewed By: jvillard
Differential Revision: D26635059
fbshipit-source-id: fa808265f
Summary:
This diff uses config-impact-issues.exp instead of issues.exp, like in
the cost checker.
Reviewed By: ezgicicek
Differential Revision: D26723761
fbshipit-source-id: 9c6779479
Summary:
Adapting existing model for `new` used in ObjC to Java.
This allows to compute dynamic type information and will facilitate
handling `instanceof`, for instance.
Changing attribute value type from Typ.Name.t to Typ.t to handle arrays.
Reviewed By: da319
Differential Revision: D26687839
fbshipit-source-id: 2cfcd0625
Summary:
Difficult to repro as most of the time other simplifactions catch this
before we actually get to dividing by zero. Nonetheless...
shamecube
Reviewed By: da319
Differential Revision: D26758187
fbshipit-source-id: b8718c515
Summary: Instead of accumulating all reports for a location in a list and then partitioning that list by issue type, just use a map from issue types to report lists.
Reviewed By: ezgicicek
Differential Revision: D26748929
fbshipit-source-id: 81c35cd4e
Summary: Now that all reports are deduplicated using the same criterion (trace length), use that to simplify deduplication functions.
Reviewed By: skcho
Differential Revision: D26726239
fbshipit-source-id: 77e3b319a
Summary:
A "severity" level was used for keeping the highest severity issue when deduplicating across many issues on the same location. This was used for only one of the issue types reported by the analysis.
It turned out this isn't very useful and it complicates significantly the reporting code.
This diff removes the type and uses trace depth to sort all the issue types in the same way all other issue types than `starvation` used.
Next diff will remove now unnecessary stuff.
Reviewed By: skcho
Differential Revision: D26725569
fbshipit-source-id: f9287dcd1
Summary:
The config impact checker prints ungated callees in a separate file config-impact-report.json,
because its results should be compared before actual reporting as the cost checker does.
Reviewed By: ezgicicek
Differential Revision: D26665097
fbshipit-source-id: 0c6e13403
Summary:
The javax.crypto.Mac classes behaves like a container
and can lead to race conditions when used in a concurrent context.
This adds Mac operations as container writes/reads in RacerD's models.
Pull Request resolved: https://github.com/facebook/infer/pull/1395
Test Plan: CI
Reviewed By: skcho
Differential Revision: D26722737
Pulled By: ngorogiannis
fbshipit-source-id: 74f03e9a5
Summary: This diff changes the compare function of `UncheckedCallee` not to distinguish direct/indirect call.
Reviewed By: ngorogiannis
Differential Revision: D26722968
fbshipit-source-id: f83f4de10
Summary: When a method is called in ObjC on nil, there is no NPE, the method is actually not called and the return value is 0/false/nil. (There is an exception in the case where the return type is non-POD. In that case it's UB. This will be addressed later). To implement this behaviour we add additional summary to ObjC instance methods {self = 0} {return = 0}. We also want to make sure that inferred summary will not be used in we call a method on nil, hence, we add a path condition {self > 0} to get a contradiction when needed.
Reviewed By: jvillard
Differential Revision: D26664187
fbshipit-source-id: cdac2a5bb
Summary:
In the following diff, we will add `JsonConfigImpactPrinter` that will share some common code base
with `JsonCostsPrinter`. This diff prepares the sharing.
Reviewed By: jvillard
Differential Revision: D26665070
fbshipit-source-id: 5032e0611
Summary:
In some corner cases where there are a lot of sequential statements, it raised stack overflow. To
avoid the issue, this diff changes the function as tail recursive by passing a callback function.
Reviewed By: ngorogiannis
Differential Revision: D26668338
fbshipit-source-id: 822d9a5f8
Summary:
Currently, we report on all functions that are not config checked. However, the aim of the analysis is to only report on these for specific functions. Moreover, this has performance implications in practice.
This diff instead reports on functions that occur on a json file that is passed by the command line option `config-data-file`.
Reviewed By: skcho
Differential Revision: D26666336
fbshipit-source-id: 290cd3ada
Summary:
As a first step to support the Java `instanceof`
operator, this change allows the path condition to be appended with
`IsInstanceOf(var, typ)`.
Reviewed By: jvillard
Differential Revision: D26664009
fbshipit-source-id: cd19dce83
Summary:
See added tests. Passing a variable by reference to a function `foo` can
cause the variable to be added to the global state so any stores after
that might be live as long as there is another function call after the
store (since the global state shouldn't outlive the scope of the
function). Currently we don't check that the latter is true; to report
these we would need to extend the abstract domain to remember which
stores have been made without a subsequent call.
Also change Blacklisted -> Dangerous everywhere since the corresponding
option is called "liveness_dangerous_classes".
Reviewed By: skcho
Differential Revision: D26606151
fbshipit-source-id: e869e5df1
Summary:
Providing model for Java `instanceof` operator that
avoids to return true when given object is null. This is a temporary
solution that will reduce FPs while we do not provide the correct
semantics for `instanceof`.
Reviewed By: jvillard
Differential Revision: D26608043
fbshipit-source-id: 87c82b906
Summary: We forgot to add `objc_fb-gk-interaction` to Makefile which could cause its test failures to go undetected since we didn't run them on CI.
Reviewed By: skcho
Differential Revision: D26612620
fbshipit-source-id: 0b9c7edd1
Summary: If we record all callees with empty summary, we end up with FPs. This diff instead only records leaf calls. for non-leaf calls, we just load the summary.
Reviewed By: skcho
Differential Revision: D26606228
fbshipit-source-id: 77e76ee9e
Summary: This diff finds a declared variable name or declared field names from trace, then constructs an error message including access paths.
Reviewed By: jvillard
Differential Revision: D26544275
fbshipit-source-id: 135c90a1b
Summary:
This diff makes the analysis inter-procedural.
* If a callee is called in a config check branch, it does nothing.
* if a callee is called outside config check branches,
* If callee's summary is empty, add the callee's name to the set of unchecked callees.
* If callee's summary is not empty, join the summary to the set of unchecked callees. (We intentionally don't add the callee's name here.)
Reviewed By: ezgicicek
Differential Revision: D26465235
fbshipit-source-id: ac3ad3543
Summary:
`add_edge_on_src` is to prepare a stack location for a local variable. Before this diff, it was
called several times for each fields.
Reviewed By: jvillard
Differential Revision: D26543715
fbshipit-source-id: 49ebf2b65
Summary:
The impurity checker assumed that in pulse summary, all key addresses of PRE state should exist in
POST state. However, the assumption is not always true. For example,
```
void foo(int x) {
int y = x;
// HERE
}
```
At `HERE`, pulse's summary is
```
POST={
roots={ &x=v1 };
mem ={ v1 -> { * -> v4 } };
}
PRE={
roots={ &x=v1 };
mem ={ v1 -> { * -> v4 },
v4 -> { } };
}
```
The `v4` entry exists only at `PRE`. Although the `v4` entry is luckily removed in the summary by
the canonicalization in this example, basically there is no guarantee about the entry sets of PRE and POST.
Reviewed By: jvillard
Differential Revision: D26550338
fbshipit-source-id: 99a31cd43
Summary:
The only difference between `program` and `identified` variables is
terminology, technically they are redundant.
Reviewed By: jvillard
Differential Revision: D26451308
fbshipit-source-id: eb4e7be43
Summary:
Negating the ids of program variables leads to inverting the order on
them. This is logically fine, the order is still a valid total order.
But it can lead to choosing younger variables as equality class
representatives over older variables, and thereby lead to more churn
as adding an equality is more likely to cause a change of
representative, and hence additional normalizing rewrites.
Reviewed By: jvillard
Differential Revision: D26451304
fbshipit-source-id: eb20d1901
Summary:
It is not necessary to clear tables and sets that do not contain any
pointers to LLVM values.
Reviewed By: jvillard
Differential Revision: D26451306
fbshipit-source-id: 403c588fb
Summary:
Theory.solved is a list of pairs of terms representing solved
equalities. The order of the pairs is very important, which is not
apparent from the type. This diff introduces an oriented_equality type
to make this more clear.
Reviewed By: jvillard
Differential Revision: D26451303
fbshipit-source-id: 56a49e601
Summary:
Generalize the existing find_or_add and find_and_remove operations to
find_update. Slightly simplify the interfaces of change, update,
find_or_add, and find_and_remove, reducing the gap to the natural
underlying functionality.
Reviewed By: jvillard
Differential Revision: D26451305
fbshipit-source-id: 89f67c84d
Summary:
The normalization and then extension of the carrier can be combined
into one pass. This weakens the property that this normalization needs
to achieve, which yields a small simplification, and combining the
passes is a minor optimization.
Reviewed By: jvillard
Differential Revision: D26400406
fbshipit-source-id: 8a3cbb2de
Summary:
An invariant of `And` and `Or` formulas is that they are flattened,
that is, `And` formulas do not have positive immediate subformulas of
form `And` nor negative immediate subformulas of form `Or`, and
similarly for `Or`. This invariant is ensured by the formula
constructors, which scan the immediate subformulas for cases that need
to be flattened.
When mapping over formulas, this repeated scanning is a performance
bottleneck. Most of the work of flattening is wasted since the input
formulas are necessarily already in flattened form, and the common
case is that the transformation preserves the flattened form. This
diff optimizes this case by detecting violations of flattening during
the transformation, performing the needed flattening, and avoiding the
general constructor that scans for flattening violations.
Reviewed By: jvillard
Differential Revision: D26338014
fbshipit-source-id: 9f15cca58
Summary:
Update the first-order equality solver for the sequence theory to
avoid searching the whole representation now that the super-term index
is maintained.
Reviewed By: jvillard
Differential Revision: D26338015
fbshipit-source-id: 24a9a19b6
Gabriela Cunha Sampaio
Nikos Gorogiannis
Boris Yakobowski
Sungkeun Cho
Jules Villard
Andrey Makeev
Daniel Schoepe
Daiva Naudziuniene
Ezgi Çiçek
Josh Berdine