Summary:
Model `x[y]` and `x.push_back(i)` to catch the classic bug of "take
reference inside vector, invalidate, then use again".
Reviewed By: da319
Differential Revision: D10445824
fbshipit-source-id: 21ffd9677
Summary:
It gets built-in integer type widths of C from the clang plugin. For Java, it uses fixed widths.
The controller you requested could not be found.: facebook-clang-plugins
Reviewed By: jvillard
Differential Revision: D10397409
fbshipit-source-id: 73958742e
Summary:
Store the correct version of the proc desc into the DB when specialising
it. This doesn't seem to be used but is useful for investigating after
the fact (eg, if we could print individual cfgs).
Reviewed By: mbouaziz
Differential Revision: D10380708
fbshipit-source-id: fd72dbfc2
Summary:
Use same code for deciding whether two accesses conflict across java/clang, by adapting that of the clang version.
Eliminate/simplify some code.
Reviewed By: mbouaziz, jberdine
Differential Revision: D10217383
fbshipit-source-id: dc0986d05
Summary: It enables placement_new to get three parameters, which happens when placement_new is overloaded (e.g. Boost).
Reviewed By: mbouaziz
Differential Revision: D10100324
fbshipit-source-id: 0ecb0a404
Summary:
Load proc descs from the "procedures" sqlite table instead of from
file-wide cfgs stored in the "source_files" table. This removes the need
for a cache of these file-wide CFGs, which was needed because loading
them is expensive and potentially needed in case we need to load the
proc descs of several procedures in the same file. Now we can just load
the proc descs one by one and not worry about caching.
Reviewed By: jberdine
Differential Revision: D10173355
fbshipit-source-id: 665636121
Summary:
Fix the logic for computing duplicate symbols. It was broken at some point and some duplicate symbols creeped into our tests. Fix these, and add a test to avoid duplicate symbols detection to regress again.
Also, this removes one use of `Cfg.load`, on the way to removing file-wide CFGs from the database.
Reviewed By: ngorogiannis
Differential Revision: D10173349
fbshipit-source-id: a0d2365b3
Summary:
First step: record the proc desc of each procedure in the "procedures"
table. Update them according to the attributes logic. Bonus: this
proc-desc for a procedure is now always in sync with its attributes.
For now nothing uses these per-procedure cfgs. Later diffs make more and
more use of them and eventually kill off file-wide CFGs from the
database.
Reviewed By: jberdine
Differential Revision: D10173350
fbshipit-source-id: b6d222bee
Summary:
There's nothing to analyse for declared procedures, and if there is then
that's because they are defined outside the source file and should not
be analysed unless ondemand needs them.
Reviewed By: ngorogiannis
Differential Revision: D10173353
fbshipit-source-id: 39c42eb7a
Summary:
In a future commit `Attributes` will depend on `Procdesc` and that
creates a cycle for the functions concerned with specialising proc
descs, which need `Attributes`.
Reviewed By: jberdine
Differential Revision: D10173354
fbshipit-source-id: 6c4ff82f0
Summary: The Nullsafe checker integration is filtering out the pre-existing warnings based on the bug hash only. However, there was a typo in the regexp and the bug hash for methods in anonymous classes was then depending on the name (in the bytecode) of the anonymous class, i.e. depending on the `N` in `ClassName$N.methodName()` where `N` is the occurrence of the anonymous class in `ClassName`. As a consequence, introducing a new anonymous class in a file was leading to all the reports in the subsequent anonymous classes to be marked as introduced.
Reviewed By: jberdine
Differential Revision: D10186651
fbshipit-source-id: 42e27c132
Summary:
Instead of many successive implicit transactions to write each
attributes of the procedures in a file, write them all in a single
transaction.
Reviewed By: jberdine
Differential Revision: D10173351
fbshipit-source-id: 5f2a5ffb5
Summary: It uses big int, instead of 63bits int of OCaml, in the interval domain in order to get preciser numeric values in the future.
Reviewed By: jvillard
Differential Revision: D10123364
fbshipit-source-id: c217f4366
Summary:
Before storing attributes to disk, we fix their location information if needed.
Ideally we wouldn't be creating bogus attributes but sometimes the frontends
are built in a way that makes it difficult to do otherwise, thus we have to
live with this. However, what's aggravating is that attributes are also saved
in the proc descs of these procedures but in their wrong version. This makes
the two versions (inside the procedures sqlite table and inside the procdesc in
the cfg of the source_files table) agree.
Reviewed By: jeremydubreil
Differential Revision: D10084708
fbshipit-source-id: 5bfd5da3a
Summary:
Callsites of `Reporting.log_error/warning` always use `Exceptions.Checkers`, let's simplify the API.
Under the hood it still creates an exception, but this can be cleaned up later.
Reviewed By: jeremydubreil
Differential Revision: D9799860
fbshipit-source-id: 6492a60b4
Summary:
The constructor `` `Typ`` is never used to build values. Removing type
substitutions from Sil.ml had knock-on effect on Typ.ml etc., resulting in more
deleted code around type substitutions \o/
Reviewed By: mbouaziz
Differential Revision: D9769340
fbshipit-source-id: 509cbd284
Summary:
- Let's call `IssueType.from_string` once only
- Use properly defined issue types for builtin linters
Reviewed By: martinoluca
Differential Revision: D9654105
fbshipit-source-id: 947b50a51
Summary:
Now that we got rid of dummy nodes used non-dummily (biabduction state, reporting), `pname` don't need to be an option anymore.
Let's save a boxing on all nodes.
Reviewed By: jeremydubreil
Differential Revision: D9654152
fbshipit-source-id: 83b00f239
Summary: No dummy node key, as a consequence the option `--skip-duplicated-types` will have no effect on issues with no node key, i.e. issues reported by non-biabduction non-eradicate checkers.
Reviewed By: martinoluca
Differential Revision: D9633564
fbshipit-source-id: 9ff8abf21
Summary: We report dead store false positives in template arguments when constexpr is used. To remove the false positives, with the expense of some false negatives, we do not report dead stores on constexpr anymore.
Reviewed By: mbouaziz
Differential Revision: D9608095
fbshipit-source-id: 91b0c71c4
Summary:
Lambdas can capture references to locals of the enclosing method as long as
they are not propagated outside the method. However to keep things simple
always allow them to capture locals of the enclosing method at the price of
some false negatives.
Reviewed By: da319
Differential Revision: D8974434
fbshipit-source-id: 957ae44bd
Summary:
Before we would convert it to string in `Reporting` and pass it to `Errlog` which would use it only to 'log events'.
I guess the reason is that there was a cyclic dependency between `Errlog` and `clang_method_kind` defined in `ProcAttributes`.
This diff:
- moves it to its own module
- defers the conversion to string
Reviewed By: jvillard
Differential Revision: D9332819
fbshipit-source-id: 43a028b61
Summary:
- abstracted the type for a node key
- moved it to its own module with an ugly `compute` to avoid cyclic dependencies...
- renamed `node_id` to `node_id_key` where needed
- moved key computation from `State` to `Procdesc.Node`
Reviewed By: jvillard
Differential Revision: D9332803
fbshipit-source-id: fe1ae8c1c
Summary:
- made arguments of `Errlog.log_issue` mandatory
- pushed some arguments of `log_issue_from_errlog` higher in the stack, the goal is to make sure `State` is only used in analyses that update it (biabduction and eradicate, if I'm correct)
Reviewed By: jvillard
Differential Revision: D9332773
fbshipit-source-id: ce79df21c
Summary: C++17 introduce guaranteed copy elision which omits constructor calls. In ownership analysis, we depended on these constructor calls to acquire ownership. In particular, when a method returns struct, previously, a constructor was used to acquire ownership. In this diff, we acquire ownership of the returned structs directly.
Reviewed By: mbouaziz
Differential Revision: D9244302
fbshipit-source-id: ae8261b99
Summary:
The internal concept of "kind" should in fact be named "severity" to match the convention used by many other tools, whereas the internal concept of "severity", i.e "HIGH", "MEDIUM" and "LOW" was never used and in any case redundant with the concept of "info", "warning", "error".
This diff maps both the "kind" and "severity" fields to value of the form "advice", "info", "warning", and "error" to be able to progressively migrate the code using the "kind" field.
Reviewed By: mbouaziz, jvillard
Differential Revision: D9187978
fbshipit-source-id: 447d89f51
Summary: Added variant type for statement node to make it cleaner to match a particular statement node.
Reviewed By: mbouaziz
Differential Revision: D8997124
fbshipit-source-id: e19f6eacd
Summary: `IntLit.to_int` could raise, was not documented until recently and was not named `_exn`. Switch to option type and fix uses.
Reviewed By: jeremydubreil
Differential Revision: D8865525
fbshipit-source-id: f5ec2f221
Summary:
When `--reanalyze` is passed, mark the summaries of procedures matching
`--procedures-filter` as needing to be analysed before running the analysis.
This allows one to, for instance, re-run the analysis in debug mode on only
some files or procedures. However, this won't work for the Java Buck
integration since the summaries are hidden away in buck-out.
Reviewed By: mbouaziz
Differential Revision: D8783668
fbshipit-source-id: 9032d83
Summary:
This allows to deduplicate some code related to walking the rows of the results
of a SQLite query. Give more meaningful names to the API while I'm at it.
Reviewed By: mbouaziz
Differential Revision: D8783332
fbshipit-source-id: 4aa6613
Summary: All the rows were wrapped in `Some` but that is not needed anywhere.
Reviewed By: mbouaziz
Differential Revision: D8783310
fbshipit-source-id: b020af3
Summary:
Filtering on the SQLite side was done to be more efficient, but these are debug
options so it should be fine for them to be not very optimised.
Filtering on the OCaml side will allow us to re-use these filtering options for
other purposes, such as re-analysing certain procedures only.
Reviewed By: mbouaziz
Differential Revision: D8767691
fbshipit-source-id: e232660
Summary: Do not start with an invalid source file when we can avoid it. Follow up from D8418447.
Reviewed By: jeremydubreil
Differential Revision: D8732168
fbshipit-source-id: 28a183b
Summary: Otherwise the dead code checker sometimes crashes with a not-totally-related error.
Reviewed By: mbouaziz
Differential Revision: D8732546
fbshipit-source-id: 65caabd
Summary: Trying to convert a large int literal to an OCaml int raises an exception. The use case here actually needed a float anyway, so add an API for that.
Reviewed By: jeremydubreil
Differential Revision: D8550410
fbshipit-source-id: 382495b
Summary: Removing an internal error in SIL to HIL translation which I had added before to log how often the particular case was happening. It happens quite often, and I have a task to investigate the issue. Removing it as it spams the analysis output a lot.
Reviewed By: dulmarod
Differential Revision: D8316822
fbshipit-source-id: 4047cbe
Summary:
`make doc` will use `jbuilder` (which in turn uses `odoc`) to generate the
documentation for infer's modules. This is useful to browse the APIs of infer
and gives a more discoverable place to host more general documentation about
infer's internals.
Besides the actual plumbing necessary to generate the docs, this diff also
- Moves the various infer/src/*/README.md to index.mld files that make it to the generated docs
- Fixes some doc comments that would anger `ocamldoc`
Closes#435
Reviewed By: mbouaziz
Differential Revision: D8314572
fbshipit-source-id: 4a5c70e
Summary: We get a lot of false positives for union types as union fields are treated as separate memory locations at the moment. For now we do not treat union fields as uninitialised.
Reviewed By: mbouaziz
Differential Revision: D8277363
fbshipit-source-id: efe5b4a
Summary:
Change the license of the source code from BSD + PATENTS to MIT.
Change `checkCopyright` to reflect the new license and learn some new file
types.
Generated with:
```
git grep BSD | xargs -n 1 ./scripts/checkCopyright -i
```
Reviewed By: jeremydubreil, mbouaziz, jberdine
Differential Revision: D8071249
fbshipit-source-id: 97ca23a
Summary:
For now: just moving this list behind an abstract type.
Next: changing the internal representation.
Reviewed By: ngorogiannis
Differential Revision: D8140926
fbshipit-source-id: 5b959b0
Summary:
Append can be costly, let's do it once only.
Depends on D8185619
Reviewed By: jeremydubreil
Differential Revision: D8185634
fbshipit-source-id: 67f84a9
Summary:
- do not `List.rev` for `List.last`
- `List.rev_filter_map` rather than `filter |> map |> rev`
Reviewed By: da319
Differential Revision: D8185619
fbshipit-source-id: aeb41a4
Summary: The order of nodes means nothing, and should not matter, let's save the whales!
Reviewed By: ngorogiannis
Differential Revision: D8182137
fbshipit-source-id: bc14a2c
Summary:
Moving away from C++ include-based models means that we cannot reliably detect
anymore whether a file includes <iostream> or not. In order not to be too
spammy, let's always assume standard streams are initialized for now when the
include models are off.
Recent versions of libstdc++ make these models redundant so there is hope that in a
bright future the analysis of std streams initialisation will work correctly without infer
having to have its own models anyway.
Reviewed By: mbouaziz
Differential Revision: D8043467
fbshipit-source-id: d118043
Summary: The type of array element is not preserved correctly in the translation from SIL to HIL. When array element is passed by a reference, i.e. `f(&(array[0]))`, the type of array element gets the type of a pointer of array element.
Reviewed By: jvillard
Differential Revision: D8071188
fbshipit-source-id: 3e6635e
Summary: Use AccessExpressions instead of AccessPath in uninit analysis. This will allow us to distinguish between pointers and their dereferences.
Reviewed By: jvillard
Differential Revision: D8042359
fbshipit-source-id: 604bcbc
Summary: Moving this function since it's about a single procdesc. Slight rewrite too.
Reviewed By: da319
Differential Revision: D8030494
fbshipit-source-id: f7cc58e
Summary:
This diff:
- translates C++ `catch` blocks
- adds an exceptional control-flow edge from the end of a `try` block to the beginning of a `catch` block
This obviously doesn't reflect the way exceptions actually work, but I think it is better than what we have now. For one thing, we'll see/translate code inside `catch` blocks, which were opaque before. If Clang analyses don't want this behavior, they can simply use `ProcCfg.Normal` (which, up until this diff, behaved identically to `ProcCfg.Exceptional`.
In the future, we can extend `trans_state` to track blocks that might throw an exception, and have each of these blocks transition to `catch` instead.
Reviewed By: jvillard
Differential Revision: D7814521
fbshipit-source-id: 67b86a6
Summary:
Previously, the type of `trans_result` contained a list of SIL expressions.
However, most of the time we expect to get exactly one, and getting a different
number is a soft(!) error, usually returning `-1`.
This splits `trans_result` into `control`, which contains the information
needed for temporary computation (hence when we don't necessarily know the
return value yet), and a new version of `trans_result` that includes `control`,
the previous `exps` list but replaced by a single `return` expression instead,
and a couple other values that made sense to move out of `control`. This allows
some flexibility in the frontend compared to enforcing exactly one return
expression always: if they are not known yet we stick to `control` instead (see
eg `compute_controls_to_parent`).
This creates more garbage temporary identifiers, however they do not show up in
the final cfg. Instead, we see that temporary IDs are now often not
consecutive...
The most painful complication is in the treatment of `DeclRefExpr`, which was
actually returning *two* expressions: the method name and the `this` object.
Now the method name is a separate (optional) field in `trans_result`.
Reviewed By: mbouaziz
Differential Revision: D7881088
fbshipit-source-id: 41ad3b5
Summary:
This is an attempt to make things more consistent, and maybe save some work
from the `Format` module in case flambda doesn't have our backs.
Reviewed By: jberdine
Differential Revision: D7775496
fbshipit-source-id: 59a6314
Summary:
One source of non-determinism is racing on procedure summaries when reporting. In particular, the summary of a method may be computed and stored by one thread, but another may be trying to report on it (eg, in cluster checkers).
One solution (at least until everything is in sqlite) is to have separate files just for the reports, a la linters. This diff improves the interface of LintIssues and generalises it ahead of using it in other analysers.
Reviewed By: jeremydubreil
Differential Revision: D7859973
fbshipit-source-id: 8672d3b
Summary:
This simplifies the frontends and backends in most cases. Before this diff,
returning `void` could be modelled either with a `None` return, or a dummy
return variable with type `Tvoid`. Now it's always the latter.
Reviewed By: sblackshear, dulmarod
Differential Revision: D7832938
fbshipit-source-id: 0a403d1
Summary: Returning the list of sub-expressions is not right and can cause assertion failures elsewhere in the frontend.
Reviewed By: dulmarod
Differential Revision: D7813493
fbshipit-source-id: 33ac9c1
Summary:
Add warning 60 (unused module) to the list of fatal warnings. Whitelisting
modules at toplevel is tricky (see inline comments) but doable.
Reviewed By: mbouaziz
Differential Revision: D7790073
fbshipit-source-id: 6f591c4
Summary:
Add a `--source-files` option to `infer explore` to print information about the source files captured by infer.
More precisely, `infer explore --source-files` will print each row of the "source_files" table in the results database.
Option `--source-files-filter` can be used to filter output to file names matching an SQLite "LIKE" pattern.
Flags `--source-files-cfgs`, `--source-files-type-environment`, `--source-files-procedure-names` and `--source-files-freshly-captured` control which columns to print.
The printers for some existing types have been tweaked to improve the output.
Reviewed By: jvillard
Differential Revision: D7735535
fbshipit-source-id: 572389a
Summary:
When looking at large CFGs, at least in `xdot`, it's often difficult to find
the procedure you're looking for. Sorting the proc names puts them in
alphabetical order, which makes searching one procedure easier.
Reviewed By: mbouaziz
Differential Revision: D7758521
fbshipit-source-id: 8e9997f
Summary:
[This is a stepping stone before moving the specs data to sqlite.]
Previously, things worked like this (ignore ObjC):
1. capture & analyse C models
2. capture & analyse C++ models
3. copy C *.specs files to lib/specs/
4. copy C++ *.specs files to lib/specs/
Now it works like this:
1. capture C models
2. capture C++ models
3. analyse both together
4. install *.specs files to lib/specs
Reviewed By: sblackshear
Differential Revision: D7639322
fbshipit-source-id: 58d7c53
Summary:
Upgrade ocamlformat, and base which needs to be done in sync in order to build
ocamlformat, and the other deps can come for the ride.
Reviewed By: jvillard
Differential Revision: D7663537
fbshipit-source-id: 3e90970
Summary: We already suppress race reports if the field is marked in this way; makes sense to do the same thing for these reports.
Reviewed By: ngorogiannis
Differential Revision: D7589275
fbshipit-source-id: 8f0aeab
Summary:
We were using the "filename" as the key because it's (kinda) unique *and* human
readable, but with the `infer explore --procedures` interface we don't really
need the human readable part anymore, so we can just use the OCaml marshalling
of the pname as the key. The human-readable version (sans unique-fying hash) is
now another column in the table, used to match procedure names in
`--procedures-filter`.
Reviewed By: sblackshear
Differential Revision: D7639158
fbshipit-source-id: e714605
Summary:
Add a `--procedures` option to `infer explore` to print information about the
procedures captured by infer. More precisely, `infer explore --procedures` will
print each row of the "procedures" table in the results database. A new
`--procedures-filter` controls which procedures to print information about, and
there is one flag per column in the db too to print more or less options about
each procedure (in particular, we can now print attributes), with some defaults.
Reviewed By: sblackshear
Differential Revision: D7639062
fbshipit-source-id: 034a2b8
Summary:
- Less `^`
- `pp_print_string` instead of `F.fprintf fmt "%s"`
- and stuff like that
Reviewed By: jvillard
Differential Revision: D7607336
fbshipit-source-id: 5d985ef
Summary:
This is unused, but the logic for keeping its value up to date was still alive
and kicking.
I don't know that making use of this flag would be easy: we could just use it
in `Ondemand.should_analyze`, but it would be unsound because a procedure might
need to be re-analysed becauese its dependencies have changed. Since there's
not code to deal with that currently I think it's best to remove it and
re-introduce it when we have some idea how to use it.
Reviewed By: sblackshear, jeremydubreil
Differential Revision: D7444179
fbshipit-source-id: 99a1ec5
Summary:
Report nullable inconsistencies by relying on the bytecode, and not on the presence of analysis summary on disk.
This use the `--external-java-packages` to avoid reporting inconsistencies outside of the codebase.
Reviewed By: sblackshear
Differential Revision: D7481101
fbshipit-source-id: 281135d
Summary:
There's actually a nice separation between IR/, base/, istd/, and the rest of
infer, so they can be made into separate jbuilder libraries so that the
separation remains. This helps make sense of the infer codebase.
Also:
- move everything biabduction-related out of backend/ and into a new
biabduction/ directory. This clarifies the current situation where backend/
contains a mix of analysis-independent code (still there now), and
biabduction-specific code (moved to biabduction/).
- move everything from base/ that is not infer-specific into istd/, e.g. IList.ml
- kill unused `FbTraceCalls`
- A couple of files needed to move around to complete the separation of base/ and IR/
Reviewed By: mbouaziz
Differential Revision: D7381842
fbshipit-source-id: cd86dea
Summary:
Limit the scope of what gets included into IStd.ml to only values that we want
to shadow. New values go into other files.
Also, build istd/ with `Core` open.
Reviewed By: mbouaziz
Differential Revision: D7382111
fbshipit-source-id: 969f0e8
Summary:
There's no real reason not to use `Core` lists in this module. Changed the
interface to be more `Core`-like. Changed the `*_changed` functions to use a
ref to track changes instead of passing the changed state around.
Reviewed By: mbouaziz
Differential Revision: D7123211
fbshipit-source-id: b27791a
Summary: The "advice" section of the error description does not seem to be used in practice.
Reviewed By: mbouaziz
Differential Revision: D7348815
fbshipit-source-id: 1d7c8c7
Summary:
At the moment, Java and Clang sources/sinks live in the same inferconfig entry.
If we try to parse a Java procedure that happens to be an invalid Clang qualified name (e.g., `MyClass.<init>`),
parsing will crash.
As a temporary fix, throw an exception and catch it instead.
In the future, we can avoid this by requiring that JSON source/sink specifications to indicate the language.
Reviewed By: mbouaziz
Differential Revision: D7291880
fbshipit-source-id: f8f4502
Summary: Add new clang_method_kind field to AnalysisIssue, logged similarly to the existing one in AnalysisStats
Reviewed By: dulmarod
Differential Revision: D7273660
fbshipit-source-id: d1ca79b
Summary:
- Noticed that there were two different type aliases for the same type, representing the return value of `__POS__`
- Combined them under `ocaml_pos` name which more closely matches the pervasive
- Moved to Logging module
Reviewed By: dulmarod
Differential Revision: D7194034
fbshipit-source-id: 22cb949
Summary: If a `Closure` expression `e` captures variable `x`, consider `e` as borrowing from `x`. When the closure is invoked via `operator()`, check that the borrow is still valid.
Reviewed By: jeremydubreil
Differential Revision: D7071839
fbshipit-source-id: d923a6a
Summary:
A matcher that matches procnames only.
To be used in bi-abduction.
Depends on D7124877
Reviewed By: skcho
Differential Revision: D7125113
fbshipit-source-id: e44f3a8
Summary:
Because it matches calls (procnames and argument list) and because I will create a `Procname`-only one.
Depends on D7124847
Reviewed By: skcho
Differential Revision: D7124877
fbshipit-source-id: eca7c21
Summary:
`Sequence` API to walk over free variables in expressions, instead of computing lists with uniqueness constraints that make them have linear complexity for insertion.
Switch to a Set representation when we don't care about the order of elements,
otherwise to a `Hash_queue`:
https://ocaml.janestreet.com/ocaml-core/113.33/doc/core/Std/Hash_queue.mod/S.modt/
Often, we don't even need to compute the sequence of free variables, as we are
just testing membership/emptiness/...
Reviewed By: mbouaziz
Differential Revision: D7099294
fbshipit-source-id: e96f84b
Summary:
Before D7100561, the frontend translated capture-by-ref and capture-by-value in the same way.
Now we can tell the difference and report bugs in the capture-by-value case.
Reviewed By: jeremydubreil
Differential Revision: D7102214
fbshipit-source-id: e9d3ac7
Summary:
The goal is to allocate less and generally be more efficient than handling
lists with uniqueness constraints.
Reviewed By: mbouaziz, jberdine
Differential Revision: D7098904
fbshipit-source-id: 7111f07
Summary:
Instead of storing the type environment in infer-out/captured/foo.c/foo.c.tenv,
store it in the `source_files` table of the SQLite db. This limits the number
of files we create on disk.
The "file local" type environemnts are specific to the clang integration. For
Java, there is a "global tenv" file. Instead of matching on string names, this
diff also makes the API of `Tenv` reflect this situation.
The global tenv is serialized as a separate file in "infer-out/.global.tenv"
instead of "infer-out/captured/global.tenv", because "infer-out/captured/" will
soon be removed as it now only contains the global tenv (except in debug mode,
where it will still be created).
In the DB, we either store the local tenv for the file, or "global" to indicate
that the global tenv should be consulted.
This diff also moves `Cfg.store` to `SourceFiles.add` because that function
deals with more than just `Cfg.t`.
Reviewed By: jeremydubreil
Differential Revision: D6937945
fbshipit-source-id: 001c10a
Summary:
You can capture a variable by reference in a lambda, assign to it, and then invoke the lambda.
This looks like a dead store from the perspective of the current analysis.
This diff mitigates the problem by computing an additional analysis that tracks variables captured by ref at each program point.
It refuses to report a dead store on a variable that has already been captured by reference.
Later, we might want to incorporate the results of this analysis directly into the liveness analysis instead of just using it to gate reporting.
Reviewed By: jeremydubreil
Differential Revision: D7090291
fbshipit-source-id: 25eeffa
Summary:
The struct fields in Cil have been sorted for long time, however the
checkers do not seem to depend on the sortedness.
Reviewed By: sblackshear
Differential Revision: D7027858
fbshipit-source-id: 9e7ab96
Summary: Just some minor renaming to be more consistent with other modules. I was about to use these modules and was too lazy to type `Ident.IdentSet`.
Reviewed By: da319, avarun42
Differential Revision: D6999808
fbshipit-source-id: c24edef
Summary:
A simple intraprocedural analysis that tracks when a storage location is read or deleted.
For now, this works only with local variable storage locations; field and array accesses are ignored.
In order to test this, I added a new "use-after-lifetime" warning. It complains when a variable is read or deleted after it has already been deleted.
Reviewed By: jeremydubreil
Differential Revision: D6961314
fbshipit-source-id: 75e95a2
Summary: More preparation for extending HIL with dereference and address of. We need left hand side of the assignment to also include dereference and address of.
Reviewed By: sblackshear
Differential Revision: D6976150
fbshipit-source-id: 47d1d76
Summary: Preparing to extend HIL with Dereference and AddressOf expressions. Next steps: (1) change SIL -> HIL translation to preserve address of and dereference; (2) adapt analyses based on HIL to make use access expressions.
Reviewed By: jeremydubreil
Differential Revision: D6961928
fbshipit-source-id: 51da919
Summary: Some tags like `Bucket` are used, but a lot are just added to the list of tags and never read.
Reviewed By: mbouaziz
Differential Revision: D6886980
fbshipit-source-id: 4474d7f
Summary:
There's a lot of code for building up and moving around `Tags`.
When working on cleaning up some of the `Errlog` code, I noticed that `Tags` were included in the JSON and wondered why.
The answer is suprisingly just one thing: only the line tags get used, and even then they are only used to decide what frame to select as the start frame for the trace (i.e., the one that is highlighted first).
That seems like overkill; starting on trace on the actual line where the error occurs, starting at the beginning of the procedure where the error occurs, or starting at the first line of the trace all seem equally reasonable.
If we are happy with any of these alternatives, we can kill `Tags` altogether and potentially save a decent amount space in our JSON artifacts.
Reviewed By: mbouaziz
Differential Revision: D6876752
fbshipit-source-id: 1580127
Summary:
- Combine two fields from ProcAttributes.t into a single field `method_kind` with more information
- New field details whether the procedure is an `OBJC_INSTANCE`, `CPP_INSTANCE`, `OBJ_CLASS`, `CPP_CLASS`, `BLOCK`, or `C_FUNCTION`
- `is_objc_instance_method` and `is_cpp_instance_method` fields no longer necessary
- Changed `is_instance` field in CMethod_signature to `method_kind` field of type ProcAttributes.method_kind
Reviewed By: dulmarod
Differential Revision: D6884402
fbshipit-source-id: 4b916c3
Summary:
- small optimization by starting deconstructing procnames/types in the dispatcher rather than the matchers
- as a consequence, returns fast for unhandled constructs like Java procnames or types
- Java is still not handled but at least does not crash
- re-enable Inferbo for Java
Reviewed By: jberdine
Differential Revision: D6912304
fbshipit-source-id: 76e95a8
Summary:
Record "capture phases" in the runstate and in the source files table of the
database. Use this instead of filesystem timestamps to decide which files need
re-analyzing in the reactive analysis.
Reviewed By: jeremydubreil
Differential Revision: D6760833
fbshipit-source-id: 7955621
Summary:
- During backend execution, infer will log detailed stats about procedure analysis
- Logging is integrated with EventLogger
- `events_to_log` field added to Stats.t record in InferPrint
- New format in InferPrint - Logs
- `format_list` type changed to have a Utils.Outfile option to support Logs format
Reviewed By: dulmarod
Differential Revision: D6834538
fbshipit-source-id: 8c847f5
Summary:
Make dead code detection part of `make test` so that dead code stops creeping
in. It's only enabled if all the analysers are enabled and if this is a
facebook build, because the dead code detection will have false positives
otherwise.
Reviewed By: mbouaziz
Differential Revision: D6807395
fbshipit-source-id: ebbd835
Summary:
I needed to do this for something, now I don't know if I want to do the thing
anymore but this seems generally useful to decrease a little bit the size of
Config.ml.
Reviewed By: sblackshear, mbouaziz
Differential Revision: D6796427
fbshipit-source-id: d9c009d
Summary:
Also, make it explicit when we load the global tenv instead of the per-file tenv.
This allows for some nice simplifications in some places, notably:
- `tenv_file` is gone from `Exe_env.file_data`
- `DB.global_tenv_fname` is no more
This will help moving the tenv from the capture/source_file/ directories on the
filesystem to the database, as keys for the relevant table are `SourceFile.t`.
Reviewed By: mbouaziz
Differential Revision: D6796594
fbshipit-source-id: 1ffd5b0
Summary:
They were constructed for each source file, and then joined into a global call
graph, only to get per-file lists of procedures. A tad wasteful.
Get this list from cfgs instead. Still record them in `exe_env` for now as
changing that code is a whole other beast.
One test falls victim of the flakiness of the analysis of recursive functions.
Reviewed By: jeremydubreil, mbouaziz
Differential Revision: D6324268
fbshipit-source-id: d5ff58f
Summary:
In preparation for getting rid of call graphs, we need to find another way to
get the list of defined procedures (which is the only place where we use the
globally-computed call graph for now).
The natural way to get the list of procedures defined in a file is to load the
cfg for that file and look at the proc names that are the keys of the cfg. This
is way too expensive, as the CFG is big. Thus, we cache this list of proc names
as another column in the SQLite database of cfgs. This gives good performance
in benchmarks.
Reviewed By: jeremydubreil
Differential Revision: D6621142
fbshipit-source-id: ed265fe
Summary: At each call to `Component$Builder.build()`, checks that the required props for `Component` have been set via prior calls to the `Builder`. Does not yet handle `Prop(optional = true)`, but will address that in a follow-up.
Reviewed By: jeremydubreil
Differential Revision: D6735524
fbshipit-source-id: 0c812fd
Summary:
Was trying to decide where to add a new Java utility function and realized that things are a bit disorganized.
Some operations on `Typ.Name.t`'s live in `Typ.Procname`, and some live inside an inner `Java` module whereas some are outside of the module with a `java_` prefix.
Let's move toward putting all Java/C/Objc/C++-specific functions in dedicated modules.
This diff does some of the work for Java.
There are Java-specific functions that operate on `Typ.Procname.t`'s that will have to be converted to work on `Typ.Procname.Java.t`'s, but changing those clients will be more involved.
Will also move C/Objc/C++ functions in a follow-up.
Reviewed By: jeremydubreil
Differential Revision: D6737724
fbshipit-source-id: cdd6e68
Summary: Use the Hashtbl functions directly as `Cfg` knows that a cfg is a hashtbl.
Reviewed By: sblackshear, jeremydubreil
Differential Revision: D6727732
fbshipit-source-id: 2cdda91
Summary:
`&::.*-->` allows to match any path end.
Used for models of `std::array` to force unmodelled functions (and types) to have a Skip summary
Depends on D6408415
Reviewed By: jvillard
Differential Revision: D6611203
fbshipit-source-id: 6663b2c
Summary:
Found the dead code with the script in the next commit, iteratively until no
warnings remained.
Methodology:
1. I kept pretty-printers for values, which can be useful to use from infer's REPL (or
when printf-debugging infer in general)
2. I kept functions that formed some consistent API (but not often, so YMMV), for instance if it looked like `Set.S`, or if it provides utility functions for stuff in development (mostly the procname dispatcher functions)
3. I tried not to lose comments associated with values no longer exported: if the value is commented in the .mli and not the .ml, I moved the comment
4. Some comments needed updating (not claiming I caught all of those)
5. Sometimes I rewrote the comments a bit when I noticed mis-attached comments
Reviewed By: mbouaziz
Differential Revision: D6723482
fbshipit-source-id: eabaafd
Summary:
In Java, static variables are distinguished by package/class:
the file where they are defined doesn't matter.
Fixes#831.
Closes https://github.com/facebook/infer/pull/833
Reviewed By: jeremydubreil
Differential Revision: D6661240
Pulled By: sblackshear
fbshipit-source-id: beeb2f9
Summary:
This avoids relying on the directories in infer-out/captured/ being created,
and instead gets the list of captured source files from the DB. This gives a
better type to clusters: `SourceFile.t` instead of `DB.source_dir`, which makes
the code a bit nicer too.
Reviewed By: jeremydubreil
Differential Revision: D6620460
fbshipit-source-id: c0edbf6
Summary: Get the error message from the database when there's an error, together with the error type.
Reviewed By: mbouaziz
Differential Revision: D6621695
fbshipit-source-id: 6bc706d
Summary:
This makes sure that sqlite doesn't hold read locks for longer than necessary,
which could starve the process of cleaning up the WAL file. This ensures that
the statement is reset as soon as we're done reading.
I haven't observed a difference with this change, and could not find evidence
that it should change something in the docs. Internet wisdom pointed at this as
a potential issue and I was observing it in another change, so it's good to
rule it out.
Reviewed By: mbouaziz
Differential Revision: D6404353
fbshipit-source-id: a123cd6
Summary: This should avoid making copies of procedure descriptions which are mutable data-stuctures.
Reviewed By: sblackshear
Differential Revision: D6658527
fbshipit-source-id: 688a142
Summary: There was several implementations of the same function accross the codebase
Reviewed By: sblackshear
Differential Revision: D6658266
fbshipit-source-id: e12507b
Summary:
Upgrade ocamlformat to 0.3, and (necessarily) base to v0.10.0.
- Fix accumulated mis-formatting
- Update opam.lock to unbreak clean build
- Update to base v0.10.0
- Update opam.lock for base
- Update offline opam repo
- Everyone should already have removed their ocamlformat pin
- ocamlformat 0.3 supports output to stdout natively
- bump version of ocamlformat
Reviewed By: jeremydubreil
Differential Revision: D6636741
fbshipit-source-id: 41a56a8
Jules Villard
Sungkeun Cho
Mehdi Bouaziz
Josh Berdine
Nikos Gorogiannis
Jeremy Dubreil
Julian Sutherland
Daiva Naudziuniene
Ezgi Çiçek
Martino Luca
Martin Trojer
Dulma Churchill
Sam Blackshear
Oliver Castillo
Frédéric Bour
Varun Arora
Radu Grigore