Summary:
It prunes abstract memories on `assert` commands.
Problem: Since the assert command is sometimes translated to two
sequential `if` statments, it was not able to prune the memory
precisely at `assert` commands in Inferbo---the pruned memory at the
first branch was joined before the second branch.
Solution: To avoid losing the pruning information at the first branch,
now, it records which locations are pruned at the first branch and
applies the same pruning at the next branch if they have
semantically the same condition.
Reviewed By: mbouaziz
Differential Revision: D6895919
fbshipit-source-id: 15ac1cb
Summary:
See comment--`Prop(resType = blah) myProp` will generate `.myProp`, `.myPropRes`, and `.myPropAttr`, and any of them can be used to set the prop.
Because our annotation parameter parsing is a bit primitive, handle this by simply checking the `Res` and `Attr` suffixes for every `Prop`.
This shouldn't lead to false negatives because these methods will only exist if the `resType` annotation is specified anyway.
Reviewed By: jeremydubreil
Differential Revision: D6955362
fbshipit-source-id: ec59b21
Summary: InferPrint should not generate StatsLogs format at all unless Config.log_events is set to true
Reviewed By: mbouaziz, dulmarod
Differential Revision: D6976352
fbshipit-source-id: d12005a
Summary: In Obj-C blocks, we explicitly insert reads of the captured vars. This does the same thing for C++. For example, `foo() { int x = 1; [x]() { return x; } }` would previously not contain a read of `x` in `foo`. Now, we'll create a temporary that reads from `x` and pass it to the closure value.
Reviewed By: dulmarod
Differential Revision: D6939997
fbshipit-source-id: f218afc
Summary:
1) Fixes some false negatives when a method annotated with `nullable` in the header is not annotated in the implementation and the attribute lookup returns the implementation. In that case, we should follow the information given in the header.
2) Fixes some false positives when annotations are in the other way around, i.e. annotated in the implementation but not in the headers. For now, there should be no report in this case, but the analysis should be extended to report the inconsistency between the header and the implementation
3) Fixes some cases of weird reports caused by name conflicts where the method in the include has the same name has another method annotated differently.
Reviewed By: jvillard
Differential Revision: D6935379
fbshipit-source-id: 3577eb0
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:
The new version of the plugin doesn't export raw assembly statements nor
comments.
update-submodule: facebook-clang-plugins
Reviewed By: da319
Differential Revision: D6948970
fbshipit-source-id: 1e2104a
Summary:
Added a check for recursive calls not to add abduced reference parameters constraints. Abduced reference parameters constraints were causing assertion failure when renaming variables in specs, in particular, when transforming variables into callee variables.
A similar check is already in place for abduced retvals constraints.
Reviewed By: jeremydubreil
Differential Revision: D6856919
fbshipit-source-id: acfe840
Summary:
This allows Eradicate to lookup the annotations from the classpath and without requiring the code in the classpath to have been previously analyzed. The benefit is that source files can be analyzed independently of each other as long as the classpath is known.
The main goal is to run be able to run Eradicate as a linter without losing warnings.
We may have to add some more models of the standard libraries as no `Nullable` on a parameter does not necessarily mean that the method does not accept `null`.
Reviewed By: sblackshear
Differential Revision: D6921720
fbshipit-source-id: f525269
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:
Useful to debug without having to rerun commands.
Looks like this:
```
Usage Error: Failed to execute compilation command:
'/home/jul/infer.fb/infer/bin/../../facebook-clang-plugins/clang/install/bin/clang'
'args.txt'
++Contents of 'args.txt':
'arg1.txt' 'arghorashy_hello_c.txt' 'args.txt'
++Contents of 'arg1.txt':
'arghorashy_c.txt'
++Contents of 'arg_c.txt':
'-c'
++Contents of 'arg_hello_c.txt':
'examples/hello.c'
Error message:
clang-5.0: error: no such file or directory: 'examples/hello.c'
*** Infer needs a working compilation command to run.
```
Reviewed By: mbouaziz
Differential Revision: D6872550
fbshipit-source-id: 65cd026
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: If the procedure is defined, then the attributes should be the same on the specs files or on the attributes table.
Reviewed By: sblackshear
Differential Revision: D6910086
fbshipit-source-id: 709b290
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:
In some cases infer runs clang commands where we do not attach the plugin,
notably for pre-processor-only commands like `clang -E foo.c`. Usually these
commands are used by build systems to test their output, so infer should not
swallow it.
This makes infer echo the stdout of clang whenever we do not attach the plugin
to clang. When the plugin is attached, stdout is captured because that's where
the plugin outputs its results, so we cannot do the same in this case (not that
we would want to yet).
Fixes#696.
Reviewed By: mbouaziz
Differential Revision: D6912101
fbshipit-source-id: c4ad2e4
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:
The boolean lock domain is simple and surprisingly effective.
But it's starting to cause false positives in the case where locks are nested.
Releasing the inner lock also releases the outer lock.
This diff introduces a new locks domain: a map of locks (access paths) to a bounded count representing an underapproximation of the number of times the lock has been acquired.
For now, we just use a single dummy access path to represent all locks (and thus a count actually would have been sufficiently expressive; we don't need the map yet).
But I'm planning to remove this limitation in a follow-up by refactoring the lock models to give us an access path.
Knowing the names of locks could be useful for error messages and suggesting fixes.
Reviewed By: jberdine
Differential Revision: D6182006
fbshipit-source-id: 6624971
Summary: There's a new `ocaml_pos` type that the other clang frontend exceptions use, but Self.SelfClassException still used the raw tuple. Now, SelfClassException also uses this type.
Reviewed By: dulmarod
Differential Revision: D6900258
fbshipit-source-id: 94c7042
Summary:
This should fix the following issues:
- the previous release (0.13.0) not building anymore (#830)
- ubuntu 17:04 reached end of life, so `apt-get update` would now fail (#846)
- Docker doesn't support the `MAINTAINER` entry anymore, replaced by `LABEL maintainer` (#857)
Fixes#830, #846, #857
Reviewed By: sblackshear
Differential Revision: D6889313
fbshipit-source-id: 14daf1d
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:
Previously, we could understand than an access was safe either because it was possibly owned or protected by a thread/lock, but not both. If an access was both protected by a lock and rooted in a paramer (i.e., possibly owned), we would forget the ownership part of the precondition and remember only the lock bit. This leads to false positives in cases where an access protected by a lock is owned, but another unowned access to the same memory is not protected by a lock (see the new `unownedLockedWriteOk` E2E test for an example).
This diff makes access safety conditions disjunctive so we can simultaneously track whether an access is owned and whether an access is protected by a thread/lock. This will fix false positives like the one explained in T24015160.
Reviewed By: jberdine
Differential Revision: D6671489
fbshipit-source-id: d17715f
Sungkeun Cho
Sam Blackshear
Jules Villard
Varun Arora
Dulma Churchill
Jeremy Dubreil
Daiva Naudziuniene
Mehdi Bouaziz
Josh Berdine