Summary:
Analyses should handle methods whose code is unknown and methods whose summary is a no-op differently.
Previously, this was done correctly for some kinds of methods (e.g., native methods, which were recognized as unknown), but not for others (interface and abstract methods).
This diff makes sure we correctly treat all three kinds as unknown.
Reviewed By: jeremydubreil
Differential Revision: D4142697
fbshipit-source-id: c88cff3
Summary:
Location.nLOC was introducing a lot of complexity for little benefit (and edge cases were wrong anyway).
We can restore it in some simplified way if we find that we need it
Reviewed By: jeremydubreil
Differential Revision: D4139868
fbshipit-source-id: 4f8e033
Summary: This fixes the build when `./configure --disable-c-analyzers` is used.
Reviewed By: jberdine
Differential Revision: D4146818
fbshipit-source-id: bec4b48
Summary:
Fix potential performance problems in `CLocation` module
1. Don't call `Unix.stat` to compare files if it's enough to compare paths
2. Use C implementation of `realpath` and call it only when it's really necessary
This diff breaks `Location.nLOC` information for whole clang frontend, but it's going away soon anyway
Reviewed By: jvillard, jberdine
Differential Revision: D4132526
fbshipit-source-id: f01afe8
Summary: Having only place where the code runs the transformation of the Java bytecode into the JBir reporesentation allows to more easily start manipulating the JBir representation and the bytecode together and progressively move the translation based on bytecode instead of JBir.
Reviewed By: sblackshear
Differential Revision: D4137576
fbshipit-source-id: c483528
Summary:
Summaries are modified before saving from disk, for example the attributes of the postcondition can change.
I have observed flaky reports of the internal error NULL_TEST_AFTER_DEREFERENCE. Some attributes (e.g. assigned) are changed before saving, but the spec table in memory is not changed.
So in case:
1) the procedure is analyzed on-demand, then subsequent uses in the same process use the summary in memory with the unchanged attribute, and the issue is not reported.
2) the procedure is already on disk and loaded, then the loaded summary has the changed attributes, and the issue is reported.
Flakiness happens as because of parallelism, whether a procedure is analyzed already or whether it is analyzed on-demand, can change.
The normalization function can change the instrumentation of a symbolic heap because it uses the existing comparison functions, which ignore instrumentations.
So normalization can replace part of a symbolic heap with an identical one but where the instrumentation is different — this is what I have observed.
The diff uses a different comparison function where instrumentations are taken into account.
Reviewed By: jberdine
Differential Revision: D4140031
fbshipit-source-id: f4f119a
Summary:
Instead of the custom filtering done by `InferPrint --issues-tests`, use the
filtering done by `infer` and run without filtering for our e2e tests. We still
test the filtering for our build systems integration tests, and this diff
restores that behaviour for the ant test (hence the bugs removed from
ant/issues.exp).
Also add internal exceptions to most tests to get more signal out of them (eg,
knowing when we add assertion failures and the like).
Retire the old `--issues-tests` to limit the number of ways we do filtering.
Reviewed By: jeremydubreil
Differential Revision: D4131308
fbshipit-source-id: 35805cc
Summary:
curr_file is remnant of the past when we didn't have good location information
coming from Clang_ast_t location. But it was fixed ~1 year ago.
Reviewed By: jvillard
Differential Revision: D4139750
fbshipit-source-id: 4ce7235
Summary:
This will be useful to migrate the existing tests to using report.json to
output the list of bugs found by Infer. This will make the tests reflect what
happens in prod more faithfully: right now running with --issues-tests does its
own filtering starting from the specs.
Moreover, this will allow --issues-tests to support the Buck integration, where
the specs/ directory is not populated after a run (although I suppose we could
also copy them from buck-out/ for InferPrint's benefit).
Reviewed By: jeremydubreil
Differential Revision: D4130851
fbshipit-source-id: 0457fba
Summary:
This makes our python code work (instead of crashing) when the source file
should be found not from the current directory (or absolute path), eg with
`infer --project-root .. -- clang -c hello.c`.
Reviewed By: jeremydubreil
Differential Revision: D4130802
fbshipit-source-id: 001f72d
Summary:
If the project root contains ".." then it doesn't work as expected, eg
infer --project-root .. -- clang hello.c
doesn't report at all. Now it works.
Reviewed By: jeremydubreil
Differential Revision: D4125489
fbshipit-source-id: 06b10ad
Summary: These functions are also called when the summary is guaranteed to exist. Enforcing this within the API
Reviewed By: cristianoc
Differential Revision: D4126839
fbshipit-source-id: 305b484
Summary: For some reason, `Specs.is_active` was re-loading from the specs table the summary that should already be in scope.
Reviewed By: cristianoc
Differential Revision: D4124693
fbshipit-source-id: c0e9113
Summary:
The Quandary-style traces are too general for checkers like SIOF.
This diff adds a "suffix abstraction" of the trace for analyses that just care about sinks.
To show how to use it, we add it to SIOF.
Note: this diff converts the domain, but isn't actually doing the fancier reporting yet.
That will come in a future diff.
Reviewed By: jvillard
Differential Revision: D4124881
fbshipit-source-id: 5b9fd07
Summary: Right now there is no test for compilation database integration. Add one
Reviewed By: jvillard
Differential Revision: D4118769
fbshipit-source-id: 5591de7
Summary:
This makes the tests depend on much fewer phony targets, thus reducing the need
to rerun the tests when nothing has changed.
Reviewed By: jberdine
Differential Revision: D4118457
fbshipit-source-id: 664b6e3
Summary:
Our default strategy for handling unknown code is to propagate taint from the actuals to the return value.
But for commonly-used methods like `StringBuilder.append` (used every time you do `+` with a string in Java), this doesn't work.
The taint should be propagated to both the receiver and the return value in these cases.
I'm considering a solution where we always propagate taint to the receiver of unknown functions in the future, but I am concerned about the performance.
So let's stick with a few special string cases for now.
Reviewed By: cristianoc
Differential Revision: D4124355
fbshipit-source-id: 5b2a232
Summary: Other checkers are going to start using these, so they shouldn't live in the Quandary directory anymore
Reviewed By: jvillard
Differential Revision: D4124654
fbshipit-source-id: b1d5bdd
Summary: A must-have for reporting taint errors and any other interprocedural error where the trace is sufficiently complex.
Reviewed By: jvillard
Differential Revision: D4124072
fbshipit-source-id: 26b3b2b
Summary:
This diff adds a skeleton implementation of the capture and analysis
driver to infer.ml, and removes some unnecessary code from infer.py.
With this, individual capture and analysis modules can be added, or
moved from python.
Reviewed By: jvillard
Differential Revision: D4109547
fbshipit-source-id: 0dce2bf
Summary: Don't use a hardcoded string, and enable reports in --issues-tests.
Reviewed By: jvillard
Differential Revision: D4110731
fbshipit-source-id: 9922557
Summary:
ClusterMakefile need not depend on Sys.executable_name referring to
InferAnalyze, use Config.bin_dir instead.
Reviewed By: jvillard
Differential Revision: D4110730
fbshipit-source-id: c330bb3
Summary:
Child processes invoked in multicore mode get arguments using the usual
INFER_ARGS mechanism already, no need for a special case.
Reviewed By: jvillard
Differential Revision: D4110728
fbshipit-source-id: 0987216
Summary: Don't ignore errors coming from clang when there are exceptions raised by the frontend
Reviewed By: jvillard
Differential Revision: D4117375
fbshipit-source-id: f31d6cf
Summary:
The Quandary-style traces are too general for checkers like SIOF.
This diff adds a "suffix abstraction" of the trace for analyses that just care about sinks.
To show how to use it, we add it to SIOF.
Note: this diff converts the domain, but isn't actually doing the fancier reporting yet.
That will come in a future diff.
Reviewed By: jvillard
Differential Revision: D4117393
fbshipit-source-id: e473665
Summary: Other checkers are going to start using these, so they shouldn't live in the Quandary directory anymore
Reviewed By: jvillard
Differential Revision: D4117359
fbshipit-source-id: e3f151e
Summary: A must-have for reporting taint errors and any other interprocedural error where the trace is sufficiently complex.
Reviewed By: jvillard
Differential Revision: D4106352
fbshipit-source-id: b2677e6
Summary:
New version of clang plugin exports `-x` arg information as a part of
TranslationUnitDecl. Get it from there instead of reading it from
clang argv
Reviewed By: jvillard
Differential Revision: D4112652
fbshipit-source-id: 5c3af1f
Summary:
Time for this framework to die. This converts the ant test to a Makefile. The
design is that each test or family of tests will have its own directory.
Do the necessary plumbing from the toplevel Makefile so that `make test` runs
the migrated tests.
Reviewed By: jberdine
Differential Revision: D4106298
fbshipit-source-id: 7bd694d
Summary:
The build system may expect the assembly commands to run. The only issue with
assembly commands is that we shouldn't attach the plugin to them.
This diff also moves the logic of what to capture to the `Capture.capture`
function to be able to reuse code from Capture. This makes sense because the
Capture module is the one with the knowledge of what to actually capture or
not.
Reviewed By: akotulski
Differential Revision: D4096019
fbshipit-source-id: 7fc99e1
Summary: We want to skip readwrite locks for now, maybe report on their misuses later.
Reviewed By: sblackshear
Differential Revision: D4110998
fbshipit-source-id: 986f77e
Summary: Make sure that infer ignores the .S file and still finds an issue in `hello.c`
Reviewed By: jvillard
Differential Revision: D4110622
fbshipit-source-id: 32f907e
Summary:
This diff moves the implementation that considers the default value of
--models to be Config.models_jar if it exists from analyze.py to ZipLib.
Reviewed By: cristianoc
Differential Revision: D4100421
fbshipit-source-id: 322fbcf
Summary:
Previously, we recorded direct sinks as sinks and transitive sinks as passthroughs. This makes it difficult to create an expanded interprocedural trace when recording an error because we can't distinguish between sinks (which we want to expand) and passthroughs (which we don't). This diff changes recording of sinks so that a sink is now the *last* function in a trace to call a sink. To find out what the original sink was, the summary for the transitive sink in the trace will now need to be (recursively) expanded until we bottom out in the original sink.
Will do the same for sources in a follow-up diff.
Reviewed By: cristianoc
Differential Revision: D4103759
fbshipit-source-id: 6f435f5
Summary:
Needed to support upcoming diff(s) that change the nature of sources/sinks in a trace. Today they are the *original* source/sink, but in the future they will be the *transitive* source/sink (last procedure to return a source/call a sink).
This new convention will make the `returnAllSources`/`callAllSinks` form of these tests not so useful, since `returnAllSources`/`callAllSinks` will now show up as a single source/sink in the trace (at least without expanding the trace). By making these tests intraprocedural, we can make sure that we're still testing everything that we want to.
Reviewed By: cristianoc
Differential Revision: D4103754
fbshipit-source-id: 1733ecf
Summary:
This diff unifies the --specs-library and --zip-specs-library options,
delaying the point where their relative order gets lost to at least
after option parsing. This also moves the treatment of non-cached jar
libraries from Config to where they are used in ZipLib. The
implementation of expanding the cached jars is slightly simplified and
untangled from option parsing.
Reviewed By: jvillard
Differential Revision: D4100015
fbshipit-source-id: cf840a7
Summary: This is assumed everywhere, and so set it in `ClangWrapper` instead of `InferClang`
Reviewed By: jberdine
Differential Revision: D4095766
fbshipit-source-id: f77625e
Summary:
See code comment about `throw exn` being translated as `return exn`.
This problem was revealed by D4081279, which started grabbing access paths from exceptions.
Reviewed By: jvillard
Differential Revision: D4096391
fbshipit-source-id: 9d91513
Summary:
this makes frontends no longer depend on SymExec.ml. `ModelBuiltins` was split into two modules:
- `BuiltinDecl` with procnames for builtins (used to determine whether some function is a builtin)
- `BuiltinDefn` with implementations used by `SymExec`
- they both have similar type defined in `BUILTINS.S` which makes sure that new builtin gets added into both modules.
During the refactor I ran some scripts:
`BuiltinDecl.ml`:
let X = create_procname "X"
cat BuiltinDecl.ml | grep "create_procname" | tail -70 | awk ' { print $1,$2,$3,$4,"\42"$2"\42"} '
then manually confirm string match. Exceptions:
"__exit" -> "_exit"
"objc_cpp_throw" -> "__infer_objc_cpp_throw"
__objc_dictionary_literal
nsArray_arrayWithObjects
nsArray_arrayWithObjectsCount
`BuiltinDefn.ml`:
let X = Builtin.register BuiltinDecl.X execute_X
cat BuiltinDecl.ml | grep "create_procname" | tail -70 | awk ' { print $1,$2,$3,"Builtin.register BuiltinDecl."$2,"execute_"$2} '
then, fix all compilation problems
Reviewed By: jberdine
Differential Revision: D3951035
fbshipit-source-id: f059602
Summary: Doing `sychronized(A.class)` where `A` is an inner class was not previously recognized by the `GuardedBy` checker.
Reviewed By: peterogithub
Differential Revision: D4095094
fbshipit-source-id: c832f9e
Summary:
Now that it's possible to run clang wrapper as a function from another process,
Logging module cannot rely on `Config.current_exe` to determine which directory
it should write to.
Reviewed By: jeremydubreil
Differential Revision: D4095455
fbshipit-source-id: d989b06
Summary:
InferClang knows what to do if its name ends in ++. So it is not
necessary to pass whether or not the original clang executable ended in
++ to InferClang using the the INFER_XX environment variable. Instead,
create an InferClang++ symbolic link and make the clang wrapper call
either InferClang or InferClang++ as needed.
Reviewed By: jvillard
Differential Revision: D4078416
fbshipit-source-id: 3b5d5d0
Summary:
We issue a thread safety warning on a class not
marked ThreadSafe, when it has a super that is. This makes some sense. But,
it will be nice to remind that a super is so maeked, else the mesg could
seem out of context or surprising
Reviewed By: sblackshear
Differential Revision: D4075145
fbshipit-source-id: ebc2b83
Summary:
This diff revises the makefiles for java tests so that they are based on
the files actually produced and depended on, instead of the existing
imperative style. This is, I think, clearer and easier to modify, and
enables a little more parallelism.
Reviewed By: jvillard
Differential Revision: D4072560
fbshipit-source-id: c16d4bd
Summary: Now that InferClang is in ocaml there is nothing stopping us from exposing functionality of `InferClang` as a function in addition to binary
Reviewed By: jvillard
Differential Revision: D4081026
fbshipit-source-id: 86d500b
Summary:
Change command line options for dynamic dispatch to capture that the
alternatives are mutually exclusive.
Reviewed By: jeremydubreil
Differential Revision: D4074540
fbshipit-source-id: c329717
Summary: The lazy dynamic dispatch algorithm works by re-analyzing the generic methods with the more specialized types encountered during the symbolic execution. In order to do that, the analysis must access the procedure description of the method to reanalyze in order to run the analysis of the specialized procedure description on demand. This diff adds the procedure description on the summary as the summary are stored in the Buck cache and can easily be retrieved by procname.
Reviewed By: sblackshear
Differential Revision: D4077415
fbshipit-source-id: c2f1cc8
Summary:
- do a semantic analysis of each variable initializer to figure out if they need initialization
- add a flag to globals that is true when they are `constexpr`. In that case, no analysis is needed as the user + compile guarantee that it is a compile-time constant.
Reviewed By: sblackshear
Differential Revision: D4081273
fbshipit-source-id: 44dbe29
Summary:
1. `--version` never makes it to infer.py
2. `--project_root` should always be set by infer.ml invocation
3. there is no need to set `--project_root` to the same value again
Reviewed By: jberdine
Differential Revision: D4074227
fbshipit-source-id: c3e93ee
Summary:
Right now, taint gets lost if it flows into a constructor or procedure whose implementation is missing.
Since the core Java (e.g., String) and Android classes (e.g, Intent) are among these, this is bad.
We could handle this by writing a bunch of models instead, but that would be a lot of work (plus we may still miss cases).
Reviewed By: jvillard
Differential Revision: D4051591
fbshipit-source-id: 65851c8
Summary: For some reason, the frontend was always caching the name of the translated classes even when the `--dependencies` was not passed
Reviewed By: jberdine
Differential Revision: D4074225
fbshipit-source-id: 8aa2c79
Summary:
Merging the results directories of targets on buck projects involved creating symbolic links into buck-out.
The bulk of files are .attr files: one per procedure. Creating these links can be a bottleneck, and the merge phase can be slower than the analysis phases on projects with many procedures.
This diff introduces multilinks to speed up merge.
A multilink is a file `multilink.txt` containing a sequence of paths
```
path/to/file1.ext
path/to/file2.ext
...
```
A multilink file is a compact way to represent a link for each entry.
This diff creates a multilink file for each `attributes/dir` directory, instead of one symbolic link for each file.
Reviewed By: jberdine
Differential Revision: D4067428
fbshipit-source-id: 911f8a9
Summary: The frontend replaces global variables that are constant with their values as a quick hack to improve the precision of the analysis. This should apply to `constexpr` too.
Reviewed By: dulmarod
Differential Revision: D4058097
fbshipit-source-id: be4fea6
Summary: This diff simplifies the workflow of creating the procedure descriptions. Instead of creating the all procedure descriptions in a first step and translating the method bodies afterwards, it is simpler to translate to do the two in one step.
Reviewed By: cristianoc
Differential Revision: D4067674
fbshipit-source-id: be9e853
Summary: Doing like this makes it easier to keep the phony declarations in sync with the target definitions
Reviewed By: jvillard
Differential Revision: D4067679
fbshipit-source-id: 723bc0e
Summary:
In several places the tests were using whatever 'infer' executable was
found in PATH, instead of the one build from the source to be tested.
Reviewed By: jeremydubreil
Differential Revision: D4065019
fbshipit-source-id: 9b65099
Summary: Fix the resolution of symbolic links. The previous version did not work if the path itself was not a symbolic link, but there was a symbolic link somewhere up in the path tree. For example: `path/to/file` where `file` is not a symbolic link, but `to` is a symbolic link.
Reviewed By: jberdine
Differential Revision: D4062947
fbshipit-source-id: 394221d
Summary: Creating a "fake" procedure description the methods that are called is no longer required by the backend. So this diff cleans up the creation of the procedure descriptions
Reviewed By: jberdine
Differential Revision: D4057185
fbshipit-source-id: b444756
Summary: This code is an old experiement and has never really be used in prod because it was creating false positive. Dealing static final fields should be done in the backend instead so that it can used by the different languages C, Objective C, C++ and Java.
Reviewed By: jberdine
Differential Revision: D4055292
fbshipit-source-id: f1dc715
Summary:
Config.analyze_models, set by the INFER_ANALYZE_MODELS environment
variable, is redundant with Config.models_mode.
Reviewed By: jvillard
Differential Revision: D4047338
fbshipit-source-id: 4522d65
Summary:
Also be more careful when escaping arguments and create a module for shared
functionality between the clang frontend and the buck compilation database.
Reviewed By: jberdine
Differential Revision: D4036627
fbshipit-source-id: c981184
Summary: Some arguments passed from infer.ml to infer.py were only used to pass further to infer.ml invocations. Those args should be passed by env variable anyway (???)
Reviewed By: jberdine
Differential Revision: D4048003
fbshipit-source-id: 6f5fbeb
Summary:
Fix an issue where, when `-reactive` mode is used, files captured in the first second are not considered modified, and are not analyzed. This happens because file timestamps are used, and the resolution is one second.
Change the front-ends to change the timestamp of the directory where artifacts are created, so that the timestamps are 1 second in the future.
Small reactive commands such as the following now analyze correctly:
rm -rf infer-out && infer --reactive -- clang -c test.c
Reviewed By: jberdine
Differential Revision: D4050689
fbshipit-source-id: 6271860
Summary:
Move compilation database into separate module which loads said database from json file.
It will allow to load database from json file without calling buck.
Reviewed By: dulmarod
Differential Revision: D4049255
fbshipit-source-id: b2fa29f
Summary:
The integration would not work if other arguments were passed to Buck via infer
using Xbuck.
Reviewed By: akotulski
Differential Revision: D4044371
fbshipit-source-id: 742b5b3
Sam Blackshear
Andrzej Kotulski
Jeremy Dubreil
Jules Villard
Peter O'Hearn
Cristiano Calcagno
Dulma Churchill
Josh Berdine
Yunxing Dai
Dino Distefano
Ryan Rhee