Summary:
Although try-with-resource is supported by nullsafe this code pattern
throws it off and make nullsafe report on a virtual **b**yte-**c**ode
variable.
Check out debug output from `TryWithResource` (or attached
visualisation of CFG):
0. node14: $bcvar2=null (on entry to try-with-resource).
1. node16: n$14=$bcvar2, but **also** PRUNE(!(n$14 == null), true). Then we go to
2. node18: do something here and in case of exception go to
3. node25->node23->node19->node20: and here we do
$bcvar2->addSuppressed(...).
Because on step 1 we refined nullability of n$14, but didn't refine
nullability of $bcvar20, on step 3 we are sure that $bcvar is null and
therefore issue an error.
Reviewed By: mityal
Differential Revision: D20558343
fbshipit-source-id: 520505039
Summary:
This is likely not the final refinement, rather one step forward.
We classify all classes by 3 categories:
- Nullsafe and 0 issues
- can add Nullsafe and will be 0 issues
- the rest (class needs improvement)
Each class will fall into exactly one category.
Error messaging is WIP, they are not intended to be surfaced to the user
just yet.
Note how this diff uses the result of the previous refactoring.
Reviewed By: artempyanykh
Differential Revision: D20512999
fbshipit-source-id: 7f462d29d
Summary: Add a flag `is-inclusive-cost` (`true` by default) which computes inclusive cost for each function. Setting the flag to `false` computes exclusive cost of the function where the cost of the callees are assumed to be `0`.
Reviewed By: skcho
Differential Revision: D20558275
fbshipit-source-id: 6b5798916
Summary:
This function is used to adapt the callee summary at a call site. It did two things for every domain element in the callee summary:
- A linear search through the list of actuals.
- For each such actual, it would (repeatedly) compute its ownership (!).
For large summaries this can be substantial. The right way is to precompute the ownership for all actuals once and then simply retrieve it (via an array).
Reviewed By: jberdine
Differential Revision: D20564447
fbshipit-source-id: 1ca3121c2
Summary: The attribute types present are exclusive, so sets are not needed for the attribute map domain. This changes `Attribute` to a flat domain and removes the set on top of that.
Reviewed By: jberdine
Differential Revision: D20560240
fbshipit-source-id: 83e59d73e
Summary:
Both modules define properties the analysis maps to addresses, there is no reason to have two modules for this.
Also remove an instance of `Caml.Not_found` usage.
Reviewed By: jberdine
Differential Revision: D20558683
fbshipit-source-id: eacafd780
Summary:
# Problem
Consider
```
some_method(Object a) { a.deref(); }
```
What is nullability of `a` when we dereference it?
Logically, things like "LocallyCheckedNonnull" etc are not applicable
here.
This would be applicable if we called some_method() outside! But not
inside. Inside the function, it can freely treat params as non-null, as
long they are declared as non-nullable.
The best we can capture it is via StrictNonnull nullability.
Reviewed By: artempyanykh
Differential Revision: D20536586
fbshipit-source-id: 5c2ba7f0d
Summary:
# Problem
Yes, nullsafe is not null-safe, such an irony.
ErrorRenderingUtils overuses `option` and `let+` constructions. Most of
internal functions can return `None` when "something is wrong".
On top of this, "default" pattern match is overused either.
Because of this, `ErrorRenderingUtils.mk_nullsafe_special_issue` returns
optional type. In practice, this result can be None for many unclear
reasons, and it is super tricky to even understand them all.
This in turn forced AssignmentRule and DereferenceRule to process this
None is defensive way. The rules have some theory why None was returned,
and have assertions along the way.
Turns out those theories might be wrong. This diff will make triaging wrong assumptions easier.
Reviewed By: artempyanykh
Differential Revision: D20535720
fbshipit-source-id: 2b81e25b7
Summary: When we have clashing args to bug (for instance -j and -Xbuck --num-threads) CLI passed -Xbuck args should win.
Reviewed By: jvillard
Differential Revision: D20557060
fbshipit-source-id: 726fc501a
Summary:
`make test` failed in some test directories, because we were getting warnings
```
Foo.java uses unchecked or unsafe operations.
```
This diff fixes or suppresses these warnings.
Reviewed By: skcho
Differential Revision: D20557572
fbshipit-source-id: 63ecd3dfa
Summary:
First version of a new memory leak check based on Pulse. The idea is to examine unreachable cells in the heap and check that the "Allocated" attribute is available but the "Invalid CFree" isn't. This is done when we remove variables from the state.
Currently it only works for malloc, we can extend it to other allocation functions later.
Reviewed By: jvillard
Differential Revision: D20444097
fbshipit-source-id: 33b6b25a2
Summary:
- Add more naive pulse models for:
- `System.arraycopy`
- `StringBuilder.setLength`
- `StringBuilder.delete`
- Model the following as pure
- `SparseArrayCompat.valueAt`
- `File.get...`
- Add a nice test
Reviewed By: jvillard
Differential Revision: D20513397
fbshipit-source-id: 6d412d13a
Summary:
`to_reportable_violation` is responsible for identifying if the
violation is reportable in this mode or not.
This logic is higly coupled with other functions in
`ReportableViolation`, such as `get_description`: You can not have
sensible description on the violation that is NOT reportable in a given
mode.
So from logical perpsective, creation of `ReportableViolation.t` should
belong to this module itself, not to the parent `Rule` module.
This change will make design clearer.
Reviewed By: artempyanykh
Differential Revision: D20511756
fbshipit-source-id: ef27b5057
Summary:
This diff finishes work in D20491716.
We removed dependency on nullsafe mode for field initialization in
D20491716, so this diff just formalizes it.
Reviewed By: jvillard
Differential Revision: D20493164
fbshipit-source-id: 6ac612e78
Summary:
This diff continues work in D20491716.
This time for Inheritance Rule.
Reviewed By: jvillard
Differential Revision: D20492889
fbshipit-source-id: c4dfd95c3
Summary:
This diff continues work in D20491716.
This time for Dereference Rule.
Reviewed By: jvillard
Differential Revision: D20492296
fbshipit-source-id: ff7f824f9
Summary:
# Problem
In current design, Rules (assignment rule, dereference rule, inheritance
rule) decide, depending on the mode, wether the issue is legit or not.
If the issue is not actionable for the given mode, it won't be created
and registered.
For meta-issues, we want to be able to do smart things like:
- Identify if we can raise strictness of the mode without
introducing new issues
- Classify classes on "clean" vs "broken", taking into account issues
that are currently invisible.
# Solution
In the new design:
1. Rules are issuing violations independently of mode. This makes sense
semantically. Mode is "level of trust we have for suspicious things",
but the thing does not cease to be suspicious in any mode.
2. Each Rule decides if it is reportable or not in a given mode.
3. `nullsafe_mode` is passed to the function `register_error`, that 1)
adds error so it can be recorded in summary for file-level analysis
phase 2) reports some of them to the user.
# This diff
This diff converts only AssignmentRule, follow up will include
conversion of other rules, so no issue encapsutes the mode.
Reviewed By: jvillard
Differential Revision: D20491716
fbshipit-source-id: af17dd66d
Summary:
`make deadcode` is failing on master but our CI jobs didn't catch it :(
Let's fix existing deadcode for now.
Reviewed By: martintrojer
Differential Revision: D20510062
fbshipit-source-id: 4a5e5f849
Summary:
Previously, at each function call, we added a `WrittenTo` attribute for applying the address of the actuals. However, this results in mistakenly considering each function application that inspects its argument as impure. Instead, we should only propagate `WrittenTo` if the actuals have already `WrittenTo` attributes.
For instance, for the following functions
```
public static boolean is_null(Byte a) {
return a == null;
}
public static boolean call_is_null(Byte a) {
return is_null(a);
}
```
We used to get the following pulse summary for `call_is_null` (showing only one of the disjuncts):
```
#0: PRE:
{ roots={ &a=v1 };
mem ={ v1 -> { * -> v2 } };
attrs={ v1 -> { MustBeValid },
v2 -> { Arith =null, BoItv ([max(0, v2), min(0, v2)]) } };}
POST:
{ roots={ &a=v1, &return=v8 };
mem ={ v1 -> { * -> v2 }, v8 -> { * -> v4 } };
attrs={ v2 -> { Arith =null,
BoItv ([max(0, v2), min(0, v2)]),
WrittenTo-----------WRONG },
v4 -> { Arith =1,
BoItv (1),
Invalid ConstantDereference(is the constant 1),
WrittenTo-----------WRONG },
v8 -> { WrittenTo } };}
SKIPPED_CALLS: { }
```
where we mistakenly recorded a `WrittenTo` for `v2` (what `a` points to). As a result, we considered `call_is_null` as impure :( This diff fixes that since the callee `is_null` doesn't have any `WrittenTo` attributes for its parameter `a`. So, we don't propagate `WrittenTo` and get the following summary
```
#0: PRE:
{ roots={ &a=v1 };
mem ={ v1 -> { * -> v2 } };
attrs={ v1 -> { MustBeValid },
v2 -> { Arith =null, BoItv ([max(0, v2), min(0, v2)]) } };}
POST:
{ roots={ &a=v1, &return=v8 };
mem ={ v1 -> { * -> v2 }, v8 -> { * -> v4 } };
attrs={ v2 -> { Arith =null, BoItv ([max(0, v2), min(0, v2)]) },
v4 -> { Arith =1,
BoItv (1),
Invalid ConstantDereference(is the constant 1) },
v8 -> { WrittenTo } };}
SKIPPED_CALLS: { }
```
Reviewed By: skcho
Differential Revision: D20490102
fbshipit-source-id: 253d8ef64
Summary:
Make all arguments named and move function from `Procname.Java` to `Procname`, and making it return a `Procname.t` as opposed to `Procname.Java.t` (all callers want a `Procname` eventually).
Various other small fixes in the callers.
Reviewed By: skcho
Differential Revision: D20492305
fbshipit-source-id: e646cc799
Summary: These tests fail when seemingly unrelated changes are made to infer. In particular, it seems timeout limits have to be increased by 10x or more to make them succeed again. Disabling until we have a more stable replacement.
Reviewed By: ezgicicek
Differential Revision: D20489647
fbshipit-source-id: 9706b0807
Summary:
This diff naively models the following as `StdVector.push_back`:
- `StringBuilder.append`
- `String.replace`
- `Queue.poll`
It also adds a FN test for `Iterator.next`.
Reviewed By: skcho
Differential Revision: D20469786
fbshipit-source-id: 2d8e8d117
Summary:
This diff is doing three things:
1. Finishes work paved in D20115024, and applies it to nullsafe. In that diff, we hardened API for
file level analysis. Here we use this API in nullsafe, so now we can
analyze things on file-level, not only in proc-level like it was before!
2. Introduces a class-level analysis. For Nullsafe purposes, file is not
an interesting granularity, but we want to analyze a lot of things on
file level. Interesting part here is anonymous classes and how we link
them to their corresponding user-defined classes.
3. Introduces a first (yet to be improved) implementation of class-level
analysis. Namely it is "meta-issues" that tell what is going with class
on high level. For now these are two primitive issues, and we will
refine them in follow up diffs. They are disabled by default.
Follow ups include:
1. Refining semantics of meta-issues.
2. Adding other issues that we could not analyze before or analyzed not
user friendly. Most importantly, we will use it to improve reporting for
FIELD NOT INITIALIZED, which is not very user friendly exactly because
of lack of class-level aggregation.
Reviewed By: artempyanykh
Differential Revision: D20417841
fbshipit-source-id: 59ba7d2e3
Summary: The `FN_loop2` was not actually FN because infer analyzes its complexity as degree 1 correctly.
Reviewed By: dulmarod
Differential Revision: D20468367
fbshipit-source-id: 9e4c19415
Summary: The `iterate_over_mycollection_quad_FN` was not actually FN because infer analyzes its complexity as degree 2 correctly. So, this diff removed `_FN` from there.
Reviewed By: ezgicicek
Differential Revision: D20467398
fbshipit-source-id: b10340612
Summary: There has never been a sufficient formal basis for soundness nor completeness of reports on locals. This diff changes the domain to effectively concern only expressions rooted at formals or globals.
Reviewed By: ezgicicek
Differential Revision: D19769201
fbshipit-source-id: 36ae04d8c
Summary: `Object.clone` modeled as pure until the analysis can distinguish returning a fresh object vs. having no side-effects.
Reviewed By: skcho
Differential Revision: D20439998
fbshipit-source-id: 421054cfb
Summary:
As ngorogiannis pointed out, we never expect whitespaces in classname, so
stripping makes no sense here in best case, and hides a bug under rug in
worst case.
Reviewed By: jvillard
Differential Revision: D20417033
fbshipit-source-id: bc7449171
Summary: Let's also print skipped calls in `pp` to ease debugging both for summary and intermediate steps.
Reviewed By: jvillard
Differential Revision: D20417852
fbshipit-source-id: 7da03ae81
Summary:
There is a module and a module type in the file PulseAbductiveDomain.ml
with the same name. This is confusing and it's better to keep separate names.
Reviewed By: jvillard
Differential Revision: D20388769
fbshipit-source-id: bcfed436e
Summary:
Be a bit more careful about the difference between PrePost.t and
AbductiveDomain.t. It's needed in another diff where the types will be
different.
Reviewed By: ezgicicek
Differential Revision: D20393927
fbshipit-source-id: beaf80c90
Summary: In preparation for PulseArithmetic to be something else.
Reviewed By: ezgicicek
Differential Revision: D20393928
fbshipit-source-id: d93131e12
Summary:
`JavaSplitName` is used to represent Java types (in `Procname` in particular). The type itself is a pair of string (an optional package qualifier) and a "type name" (the quotes are there because it may contain array qualifiers).
For example `java.lang.Object[][]` should be represented as
```
{package=Some "java.lang"; typename="Object[][]"}
```
The constructor `make` was misused to construct instead types such as
```
{package=None; typename="java.lang.Object[][]"}`
```
This is evident when we print the return type of a `Procname` non-verbosely (the default), but we still see the package qualifier.
Obviously this is not just a pretty-printing bug, the values were themselves wrong.
The fix is to use the `of_string` constructor which will parse the package and separate it correctly. Another bug (in response to this one) had to be fixed in `Procname.is_vararg` to maintain behaviour in Nullsafe and Quandary.
Reviewed By: mityal
Differential Revision: D20394146
fbshipit-source-id: 4633902eb
Summary:
We will use it in follow up diffs.
From many perspectives, if the function belongs to an anonymous class,
it is useful to know the original user-defined class.
This function makes this distinction clear.
Thanks to ngorogiannis, whos work on refactoring `Typ.name` made this module
easy enough so we can introduce unit tests!
Reviewed By: ngorogiannis
Differential Revision: D20389311
fbshipit-source-id: 408d95660
Summary: `Procname.Java.get_return_typ` is buggy because whenever faced with an array of objects, it returns a type that implies the object is stored by value in the array (this is correct behaviour only when the element type is primitive, not when it's an object type).
Reviewed By: ezgicicek
Differential Revision: D20384403
fbshipit-source-id: d91322d3a
Summary:
We try to consolidate Java-specific stuff in JavaClassName.
Let's introduce the function in JavaClassName and make it clear that
its analog in Typ.Name.Java one throws if called on a wrong type.
Reviewed By: ngorogiannis
Differential Revision: D20386357
fbshipit-source-id: a1577ef8b
Summary:
Impurity domain was tracking all changes to variables (with a list of traces that containing all write/invalid accesses). This results in having long traces with multiple access events for the same variable. For instance,
```
void swap_impure(int[] array, int i, int j) {
int tmp = array[i];
array[i] = array[j]; \\ included in the trace
array[j] = tmp; \\ included in the trace
}
```
here we recorded both array accesses.
This diff changes the domain to include accesses so that we only keep track of a single trace per access. Array accesses are only recorded once.
Note that we want to record all unique accesses, not just the first one, because impurity will be used for hoisting/cost where we will invalidate impure arguments and consider all the rest as not changing.
Reviewed By: jvillard
Differential Revision: D20385745
fbshipit-source-id: d3647dad3
Summary:
D20362149 missed
- to pass the optional argument `include_value_history` to the recursive call in `PulseTrace.add_to_errlog`.
- to set `include_value_history=false` for skipped calls.
This diff fixes these issues.
Reviewed By: skcho
Differential Revision: D20385604
fbshipit-source-id: 176e4d010
Summary: No need to load the contents of the whole file(s) as a string first.
Reviewed By: ngorogiannis
Differential Revision: D20362602
fbshipit-source-id: 46fbc3693
Summary:
Next step in moving logic from make to dune. Since dune understands
build rules with multiple targets we don't need to introduce
artificial pipelining as in make. Rules are pretty straightforward,
albeit somewhat verbose.
The tricky part here was adjusting deadcode detection.
Reviewed By: jvillard
Differential Revision: D20322605
fbshipit-source-id: 688e5f96f
Summary:
Main changes are:
1. Dune can promote targets into the source tree as a part of build. This
allows us to **remove custom promotion/installation logic in src/Makefile**.
2. Dune promotion only works for path within workspace. This required
**moving dune-workspace one folder up**: from infer/infer/src to infer/infer.
But this is not bad, since it makes it possible to migrate tests under dune at some point.
3. `checkCopyright` now also promoted into `infer/infer/bin` instead of
`infer/scripts` partly for consistency and partly because of the
dune-workspace location.
4. `byte` mode was replaced with `byte_complete`. The latter takes
similar amount of time to build compared to `byte`, but produces
standalone binaries that don't require InferCStubs to be
installed. This allowed to remove `dune_exec_shim` and custom logic
around `dune build InferCStubs.install` when dealing with byte
targets.
All in all, `infer/src/Makefile` is not about 2/3 its previous size
with less custom logic in Makefiles/scripts and more encoded in dune
build files.
Reviewed By: jvillard
Differential Revision: D20303902
fbshipit-source-id: 9e4c65bd0
Summary:
With the introduction of environments and profiles we no longer need
to generate most dune files in libraries via make. Also, those dune
builds don't need to be in OCaml.
In addition to converting build files to plain sexp definitions, this
patch also:
- Adjusts copyrightCheck to work correctly with sexp-based dune files.
- Adds auto-formatting for sexp-based dune files.
Reviewed By: jvillard
Differential Revision: D20250208
fbshipit-source-id: 495aeaa99
Summary: With plain/sexp dune files we need to support lisp style comments in checkCopyright
Reviewed By: jvillard
Differential Revision: D20366314
fbshipit-source-id: 04db9e3c1
Summary:
With profiles and `(env ...)` stanza it's possible to consolidate
various ocamlc/ocamlopt/etc setups in a single place.
Where previously we needed to append `dune.common` to every dune file
and specify `flags` and `ocamlopt_flags` now the flags are specified
in `env` and applied accross the board.
This allows to
1. simplify build definitions,
2. avoid the need to generate dune files,
3. use plain sexps instead of OCaml and JBuilder plugin in build
files.
(I'll try to address 2 and 3 in the followup patches).
Existing `make` targets should continue working as before. Also, we
can use dune CLI like so:
```
infer/src$ dune printenv --profile opt # <- very useful for introspection
infer/src$ dune build check
infer/src$ dune build check --profile test
infer/src$ dune build infer.exe --profile dev
infer/src$ dune build infer.exe --profile opt
```
Also, with just 1 context something like `dune runtest` will run unit
tests only once instead of N times, where N is the number of contexts.
Now, there's one difference compared to the previous setup with
contexts:
- Previously, each context had its own build folder, and building infer
in opt context didn't invalidate any of the build artifacts in default
context. Therefore, alternating between `make` and `make opt` had low
overhead at the expense of having N copies of all build artifacts (1
for every context).
- Now, there's just 1 build folder and switching between profiles does
invalidate some artifacts (but not all) and rebuild takes a bit more
time.
So, if you're alternating like crazy between profiles your experience
may get worse (but not necessarily, more on that below). If you want
to trigger an opt build occasionally, you shouldn't notice much
difference.
For those who are concerned about slower build times when alternating
between different build profiles, there's a solution: [dune
cache](https://dune.readthedocs.io/en/stable/caching.html).
You can enable it by creating a file `~/.config/dune/config` with the
following contents:
```
(lang dune 2.0)
(cache enabled)
```
With cache enabled switching between different build profiles (but
also branches and commits) has ~0 overhead.
Dune cache works fine on Linux, but unfortunately there are [certain
problems with
MacOS](https://github.com/ocaml/dune/issues/3233) (hopefully, those
will be fixed soon and then there will be no downsides to using
profiles compared to contexts for our case).
Reviewed By: jvillard
Differential Revision: D20247864
fbshipit-source-id: 5f8afa0db
Summary:
What was happening in that case is that a .inferconfig file containing `{ "myflag":
false }` used to be translated by CommandLineOption as `--no-` (`--no-<long>`),
because it picked the *non-deprecated* form of the option (here `myflag` would
have to be a deprecated form of the option since its non-deprecated form is
empty `""`). Instead, pick a non-empty form of the option.
Reviewed By: jberdine
Differential Revision: D20368784
fbshipit-source-id: 8e761e684
Summary:
This was never quite finished and inferbo has a new way to do sort of
the same thing.
Reviewed By: skcho, ngorogiannis
Differential Revision: D20362619
fbshipit-source-id: 7c7935d47
Summary: Just for fun, and because killing InferPrint.ml is just so satisfying.
Reviewed By: ngorogiannis
Differential Revision: D20362643
fbshipit-source-id: 039cfec61
Summary:
Now that this module only prints report.json and costs_report.json, we
can dis-entangle the whole callback spaghetti.
Reviewed By: ngorogiannis
Differential Revision: D20362640
fbshipit-source-id: 56ffa4e08
Summary:
At this point in the stack, here's what's left in InferPrint.ml:
1. how to output report.json and costs_report.json
2. how to print summaries from the command line (`infer report`)
3. how to print --issues-tests stuff (`infer report --issues-tests`)
Keep only 1. in there. 2. goes to SpecsFiles.ml directly from infer.ml,
and 3. goes to its own module (also the fields to output in
--issues-tests get a non-poly variant).
1. does some extra stuff sometimes, eg in test-determinator mode. Keep
this for now.
Reviewed By: ngorogiannis
Differential Revision: D20362642
fbshipit-source-id: 0d9f0e8e2
Summary:
Make <infer-out>/report.json the default value for this option, as this
is what is used 99% of the time. Clean up test options using this.
Reviewed By: ngorogiannis
Differential Revision: D20362644
fbshipit-source-id: a1bb18757
Summary:
InferPrint hasn't been in charge of writing bugs.txt since forever.
This will be re-implemented as a post-processing of report.json instead
(like it is now, but in OCaml instead of python).
Reviewed By: ngorogiannis
Differential Revision: D20362641
fbshipit-source-id: 83d8cb53d
Summary:
I don't think anyone uses this. Meta-goal: cleaning up InferPrint.ml.
Measuring stats about summaries is good in principle, but we should do
it somewhere else instead of in the InferPrint callback hell. For
instance when we record each summary. Meanwhile, delete this.
Reviewed By: ngorogiannis
Differential Revision: D20362639
fbshipit-source-id: c73d431a5
Summary:
Adding a model for malloc: we add an attribute "Allocated". This can be used for implementing memory leaks: whenever the variables get out of scope, we can check that if the variable has an attribute Allocated, it also has an attribute Invalid CFree.
Possibly we will need more details in the Allocated attribute, to know if it's malloc, or other allocation function, but we can add that later when we know how it should look like.
Reviewed By: jvillard
Differential Revision: D20364541
fbshipit-source-id: 5e667a8c3
Summary:
This is not a full cleanup, but it is better than nothing.
At least `callback2` won't trigger me each time I see it anymore.
Reviewed By: jvillard
Differential Revision: D20364812
fbshipit-source-id: 8f25c24ad
Summary: Impurity traces are quite big due to recording values histories. Let's simplify the traces by removing pulse's value histories.
Reviewed By: skcho
Differential Revision: D20362149
fbshipit-source-id: 8a2a6115e
Summary: Type is not enough to say a function call of `Provider.get` is expensive or not.
Reviewed By: jvillard
Differential Revision: D20366206
fbshipit-source-id: 83d3e8741
Summary:
This diff uses a type parameter of `Provider.get` to decide whether assigning expensive cost to the
function call or not. For example, if the type is small one like `Provider<Integer>`, it be
evaluated to have a unit cost, otherwise a linear cost.
To get the return type of `Provider.get`, I added a simple analyzer that collects "casted" types
backwards. In Sil, while the function call statement loses the return type, e.g,
```
n$5=_fun_Object Provider.get()(n$3:javax.inject.Provider*);
```
the `n$5`'s value is usually casted to a specific type at some point later.
```
*&$irvar0:java.lang.Object*=n$5
n$8=*&$irvar0:java.lang.Object*
n$9=_fun___cast(n$8:java.lang.Object*,sizeof(t=java.lang.Integer;sub_t=( sub )(cast)):void)
```
So, the analyzer starts from the cast statements backward, collecting the types to cast for each
variables.
Reviewed By: ezgicicek
Differential Revision: D20345268
fbshipit-source-id: 704b42ec1
Summary:
The previous diff finally unblocks this important milestone.
Now we have only one place when `convert_complex_exp_to_pvar` needs to
modify the typestate (in Sil.Load typechecking).
Because the only case left is when `~is_assignment: false`, we also can
simplify logic of updating the typestate (remove dependency on
`is_assignment`, and rename the methods so they more clearly say what
they do (instead of vague "update_typestate").
This diff, in turn, unblocks further refactoring. Namely, remove this
remaining usage of
`convert_complex_exp_to_pvar_and_register_field_in_typestate` from
Sil.Load instruction so that there is no tricky field magic left!
We will try doing it in follow up diffs.
Reviewed By: artempyanykh
Differential Revision: D20334924
fbshipit-source-id: 20ce185ed
Summary:
When assigning to field `field = expr()` we need to compare actual
nullability of `expr()` (rhs) with formal nullability of field (lhs).
Formal nullability is based on field declaration.
Before this diff lhs nullability was calculated based on actual
nullability of lhs. This is an absolutely wrong thing to do!
E.g. `field = null` would update nullability of field in typestate, and
from this field will be considered as nullable, so next time field =
null is allowed...
Due to series of hacks pile on top of each other, this wrong behavior
actually works correctly; but this depends on completely wrong things
happening in other places of the program (e.g. typestate modifies in
wrong places to make this work!).
This diff unblocks refactoring that will clean up hacks mentioned above,
and simplify typechecking logic.
Reviewed By: artempyanykh
Differential Revision: D20334925
fbshipit-source-id: 8bbcbd33a
Summary: The macro is dead. It had been used when Inferbo had include-based C++ models.
Reviewed By: jvillard
Differential Revision: D20309031
fbshipit-source-id: bcfd8f923
Summary:
Warning: This might be a bit brutal.
PerfStats and EventLogger are pretty much subsumed by `ScubaLogging`.
It seems no one has been looking at the data they generate recently.
Let's delete them! If we need to re-implement some parts later on, let's
do that using `ScubaLogging`, which is better (eg, still produces data
when infer crashes).
Things we lose:
- errors in the clang frontend due to missing decl translation, etc.
- errors in biabduction due to timeouts, functions not found, etc.
We could also re-implement these using BackendStats and ScubaLogging
instead of brutally deleting everything.
Reviewed By: ngorogiannis
Differential Revision: D20343087
fbshipit-source-id: 90a3121ca
Summary:
At some point we thought disconnected CFGs (where some nodes are not
reachable from the initial node) were signs of bugs in our frontend, but
it turned out not to be the case. Thus, we compute the boolean "is
connected" for each procdesc for the only purpose of logging that
uninteresting piece of information.
Delete it.
Reviewed By: ngorogiannis
Differential Revision: D20342834
fbshipit-source-id: 3f9317003
Summary:
The goals are to have all the checker definitions and documentation in one
place (except how to actually run them, since that's not quite the same
concept; for example inferbo is one checker but several analyses depend on its
symbolic execution), and later on to be able to link issues reported by infer
back to the checker that generated them.
This makes apparent that the documentation of our checkers is lacking,
not touching that in this diff.
Not sure if "analysis" would be a better name than "checker" at this
point? For instance "Linters" is one of the checkers, which historically
at least we have not considered to be the case.
Reviewed By: mityal
Differential Revision: D20252386
fbshipit-source-id: fc611bfb7
Summary:
Some options are deprecated and this is indicated with `~long:""`. But for
boolean options this creates a spurious `"--no-"` flag. Detect when the option
has an empty flag and don't create the "no" version in that case.
Reviewed By: ngorogiannis
Differential Revision: D20286830
fbshipit-source-id: 9a2095ea8
Summary: This diff adds a model for Java's `Object.clone()` method (similar to existing shallow_copy).
Reviewed By: jvillard
Differential Revision: D20341073
fbshipit-source-id: 30ae40fe7
Summary:
Some (all?) of this is already tested in other tests, but this feature
is important enough (and the implementation is scattered accross the
whole code), so I found it useful to have a small test that ensures the
very basic things are working as expected.
See `NestedFieldAccess.java` that tests far more advances things, but
here we focus only very basic things: conditions, local variable
assignments, and explicit assignments.
Reviewed By: jvillard
Differential Revision: D20339056
fbshipit-source-id: a6cfd0043
Summary:
A java byte is not a short and a java character is not a C character. Fix those types by mapping them to what the spec ordains.
An extra advantage is that this establishes a bijection between java types and their project in the `sil` type system, so pretty printing in Java mode can actually be made to work.
Reviewed By: mityal
Differential Revision: D20330525
fbshipit-source-id: 00ac2294b
Summary:
- ignore `ConstantDereference` invalidations since they just represent assignments to constants.
- add `impurity.mli`
- split `extract_impurity` into several sub functions.
Reviewed By: jvillard
Differential Revision: D20335674
fbshipit-source-id: f0fd6b5f4
Summary:
1. Log cases when we fall back to default while typechecking (we aim to
gradually reduce their usage)
2. Log high level operations when checking field assignment
Reviewed By: ngorogiannis
Differential Revision: D20334923
fbshipit-source-id: 80c45b29e
Summary:
Experiment show that we did not rely on fact that this function could modify
typestate.
Reviewed By: artempyanykh
Differential Revision: D20285198
fbshipit-source-id: dc20f4b4b
Summary:
Previous diff introduced convert_complex_exp_to_pvar that does not
modify typestate.
Luckily enough, experiement shows that we don't need it in this place!
Reviewed By: artempyanykh
Differential Revision: D20284942
fbshipit-source-id: ea1471681
Summary:
This function is converting exp to pvar AND sometimes modifies a
typestate (even when ~is_assignment is false, which is something one
would not expect!).
We aim to reduce cases when it is not needed.
This diff splits the function into two: good and evil, and uses good
when it is a no-op.
Reviewed By: ngorogiannis
Differential Revision: D20284301
fbshipit-source-id: 0e5d65a65
Summary:
Extract `Typ.Name.Java.Split` into a standalone module.
- This module is really only used in `Procname` so no need to be in `Typ`.
- Remove some pointless conversions to strings and back.
- Reduce the interface of `Split` to the minimum ahead of possible removal in favour of normal types.
Reviewed By: mityal
Differential Revision: D20322887
fbshipit-source-id: 7963757cb
Summary:
- Use `Typ` constants instead of constructors for basic types.
- Nest single-use unexported functions at the point of use.
- Improve exception safety wrt `Not_found` exceptions by preferring `_opt` functions.
- Simplify deeply nested `match` statements by pushing conditionals to `when` clauses when possible.
Reviewed By: skcho
Differential Revision: D20304392
fbshipit-source-id: edbc08219
Summary:
- Remove dead argument in function in JMain.
- Document order of constructed classpath.
- Stop asking repeatedly for the cwd in `add_source_file`.
- Improve exception safety and readability in `load_from_verbose_output`.
Reviewed By: ezgicicek
Differential Revision: D20290519
fbshipit-source-id: 86c32dcdf
Summary:
Problem: `infer report <specs file name>` is called manually sometimes to see analysis results in CLI. However, giving the specs file name is sometimes annoying, because the specs file name may be quite long and include special characters sometimes.
This diff introduces `--procedures-summary` to lookup the summaries interactively in `infer explore`.
example1: There are 8 procedures that include "max" in their names, then I selected one of them by entering a number.
```
$ infer explore --procedures --procedures-filter '.*max.*' --procedures-summary
0: minmax_div_const2_Bad_FN
1: minmax_div_const_Good
2: use_int64_max_Bad
3: use_uint64_max_Good
4: use_int64_max_Good
5: minmax_div_const_Bad
6: minmax_div_const2_Good
7: use_uint64_max_Bad
Select one number (type 'a' for selecting all, 'q' for quit): 2
void use_int64_max_Bad()
Analyzed
ERRORS: BUFFER_OVERRUN_L1
WARNINGS:
FAILURE:NONE SYMOPS:0
BufferOverrunAnalysis: StackLocs: { } MemPure: { } Alias: { ret= }
BufferOverrunChecker: Safety conditions:
{ }
```
example2: If there is only one specs file that satisfies the given filter, it reports the summary of that procedure without an interaction.
```
$ infer explore --procedures --procedures-filter '.*add_in_loop_ok.*' --procedures-summary
Selected proc name: void ArrayListTest.add_in_loop_ok()
void void ArrayListTest.add_in_loop_ok()(ArrayListTest* this)
Analyzed
ERRORS:
WARNINGS:
FAILURE:NONE SYMOPS:0
BufferOverrunAnalysis: StackLocs: { } MemPure: { } Alias:
{ i=size(__new-390022197-0-1.elements), ret= }
LatestPrune: latest { i -> (5, { }, { }) by ((5, { }, { }) >= (5, { }, { })),
__new-390022197-0-1.elements -> (⊥, { }, { __new-390022197-1-1 -> length : 5 }) by ((5, { }, { }) >= (5, { }, { })) }
BufferOverrunChecker: Safety conditions:
{ }
```
Reviewed By: jvillard
Differential Revision: D20284052
fbshipit-source-id: 2131339f1
Summary:
Found a high number of `uname` syscalls while tracing infer. Figured it
must be the `Unix.gethostname` call. Stop continuously asking for the
hostname.
Reviewed By: jberdine
Differential Revision: D20309048
fbshipit-source-id: b8be1f2dc
Summary:
These are important enough operations to be tracked in logs.
This diff also tweaks logs for the main loop processing instuctions, so
that we log instr before processing it, not the reverse
Reviewed By: artempyanykh
Differential Revision: D20282443
fbshipit-source-id: 40b8b6627
Summary: The class map of biabduction models does not need to be part of the program type. This diff centralises all that in JModels module.
Reviewed By: jvillard
Differential Revision: D20283623
fbshipit-source-id: 5f95a7477
Summary:
- Factor out function that walks zip filename entries in jar file.
- Kill dead type (`classpath`) and record field (`classpath`).
- Make some string arguments named.
- Introduce function that folds over classnames in jar file and reduces occurrences of pattern "produce list, fold over it".
Reviewed By: artempyanykh
Differential Revision: D20245756
fbshipit-source-id: ccca47cdd
Summary: We don't need skipped calls for pre and post. Let's pull them out to `PulseAbductiveDomain`, next to pre and post.
Reviewed By: jvillard
Differential Revision: D20283589
fbshipit-source-id: 5cf970292
Summary: We forgot to take skipped calls into account for state comparison. This diff fixes that.
Reviewed By: skcho
Differential Revision: D20282739
fbshipit-source-id: 7b4d84bb0
Mitya Lyubarskiy
Artem Pianykh
Nikos Gorogiannis
Ezgi Çiçek
Martin Trojer
Dulma Churchill
Sungkeun Cho
Jules Villard
Alexander Mols