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:
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:
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: 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:
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:
- 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:
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:
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:
This also adds `-a compile` support to `InferClang`. This is needed for the
`xcodebuild` integration, which is hard to fold into the same binary as the
rest.
Reviewed By: jberdine
Differential Revision: D4008262
fbshipit-source-id: 0bbd53f
Summary:
Checker for the Static Initialization Order Fiasco pattern:
https://isocpp.org/wiki/faq/ctors#static-init-order
1. Collect all globals (transitively) accessed in any given procedure.
2. Once the interprocedural analysis has finished, look at globals accessed in
initializers that do not belong to the current translation unit.
Reviewed By: sblackshear
Differential Revision: D3780266
fbshipit-source-id: 1d07161
Summary:
Create dummy functions representing the initializers of global variables. This
is so we can implement checks in the backend that can look at the initializer
expressions of global variables. We try not to create these dummy functions
when the initializer is not present, although for some reason we sometimes end
up with empty initializers.
Also add source file info to global variables in the backend (Pvar.re).
Reviewed By: sblackshear
Differential Revision: D3780238
fbshipit-source-id: 2dca87e
Summary:
Before, if I wrote code like
```
x = src()
sink(x)
sink(x)
```
we would report three times instead of two.
The first flow would be double-reported.
Reviewed By: jeremydubreil
Differential Revision: D4024678
fbshipit-source-id: fcd5b30
Summary: when a method has writes to a field outside of synchrnoization, issue an appropriate error message identifying the fields
Reviewed By: sblackshear
Differential Revision: D4015612
fbshipit-source-id: 4f697fc
Summary:
It's not necessary if compiling tests in infer environemnt. It may be required if compiling some C++ tests
without infer. `infer/tests/codetoanalyze/cpp/shared/attributes/depracated_hack.cpp` is one of them
Reviewed By: cristianoc
Differential Revision: D4008850
fbshipit-source-id: 5d94bdf
Summary:
This changes executions of the former InferClang into a function call. In
particular, it can be called several times per execution.
The new InferClang must be called as if it was clang, and knows how to run
clang with our plugin to get the AST of the source file.
Reviewed By: akotulski
Differential Revision: D3981017
fbshipit-source-id: 7af6490
Summary:
This changes the algorithm for pure join to keep the constraints that,
after normalization, occur in both arguments. Previously pure join
would normalize, filter, and then union the constraints of the
arguments.
Reviewed By: sblackshear
Differential Revision: D3970394
fbshipit-source-id: 3dc1672
Summary:
Add a test case for a problem peterogithub uncovered with join of
attributes. The expected result is currently incorrect, to be fixed
later.
Reviewed By: sblackshear
Differential Revision: D3970363
fbshipit-source-id: 077705d
Summary:
Let's start migrating some of our bash script to OCaml to make them easier to
maintain and extend.
For now replace just one script and put it in lib/clang_wrappers/ at compile
time, where the former script used to be. Further simplifications will come
later.
Reviewed By: jberdine
Differential Revision: D3929988
fbshipit-source-id: b2d8b37
Summary:
We were previously leaking the passthroughs of the callee into the caller.
We definitely don't want to do this since it could make the summaries higher up in the call stack explode.
If we need to know the passthroughs of a callee, we can always read them from the callee's summary.
Reviewed By: jeremydubreil
Differential Revision: D3972679
fbshipit-source-id: 5b5903f
Summary: The Infer builtins can be used in the e2e tests, but those tests should not depend on the Infer models to avoid cyclic dependencies. This diff separates the models and the Infer builtins in two directories so that the test can depend on the builtins without depending on the models
Reviewed By: sblackshear
Differential Revision: D3929478
fbshipit-source-id: 7d0ab79
Summary:
Convert the last remaining tests to the new direct format: java harness and crashcontext.
Remove what is left of the old testing infrastructure.
Reviewed By: sblackshear
Differential Revision: D3886355
fbshipit-source-id: 5117868
Summary:
Rename symbols in test files so they are not duplicated and files can be analyzed together without affecting analysis results.
Fix some compilation errors, where files could be analyzed but would fail direct compilation.
Add Makefile mimicking the same analysis parameters used for the existing tests.
Reviewed By: dulmarod
Differential Revision: D3869993
fbshipit-source-id: 6db1baf
Summary:
For tests that have reports of the form `<file>:<line>*`, sort first by
file, then by line numerically.
Reviewed By: sblackshear
Differential Revision: D3828044
fbshipit-source-id: d10cffe
Summary:
This diff fixes two issues in the backend that were causing Bad_footprint
errors when abducing pointsto facts for expressions that start in an array
access and follow up with another structured access, eg `x[0].some_field`:
1. array accesses were assumed to come last in these expressions
2. the type of the root exp passed to the function that walks down the list of
offsets to apply to it was wrong in the case of arrays: it was always the
type of the whole expression instead of the root expr (eg the type of
`x[0].some_field` instead of the type of `x`).
Reviewed By: sblackshear, jeremydubreil
Differential Revision: D3800566
fbshipit-source-id: 0511604
Summary:
1. models no longer need access to private fields (shared_ptr needed that)
2. create macro for __attribute__((deprecated("__infer_replace_with_deref_first_arg"))) and use it in models
Reviewed By: jberdine
Differential Revision: D3791113
fbshipit-source-id: 532dd33
Summary:
Follow strategy that was done to `std::shared_ptr` model and translate
`std::unique_ptr<T>` as raw pointer `T*`.
As a bonus, model `operator[]` of array overload as dereference
Reviewed By: jvillard
Differential Revision: D3785031
fbshipit-source-id: 2c5b0a4
Summary:
This diff converts the Eradicate and Checkers tests to the new direct test format, which does not rely on buck or junit.
A self-contained Makefile is used to compile and analyze the test files, including all the dependencies, and a special option in InferPrint is used to produce a file of expected results `issues.exp`, which is checked into the repository.
Having an explicit Makefile makes it easy to edit and compile one set of test files in isolation, to investigate test failures, do debugging, etc.
A bunch of boilerplate code is removed. For example, the single file of expected results `issues.exp` replaces the 1.5K LOC in `endtoend/java/eradicate`.
Reviewed By: jvillard
Differential Revision: D3764632
fbshipit-source-id: 6c68ab8
Summary:
1. Add capability to clang frontend to replace some function calls with another SIL code based on `__deprecated__` attribute.
2. Given this capability, use those attributes for shared_ptr getters to generate `Sil.Load` instruction instead of method call
3. Add test that mimics shared_ptr model, but it doesn't have that much scary C++ templated code
Reviewed By: jvillard, jberdine
Differential Revision: D3729176
fbshipit-source-id: 2a330d5
Summary:
Make std::shared_ptr<T> translated as T* inside infer. This will make reporting better
since smart pointers are really pointers not structs - this form is much easier for the analyzer to understand.
This requires changes to the model of shared_ptr as well.
Reviewed By: jvillard
Differential Revision: D3587255
fbshipit-source-id: b86fb36
Summary: Make it possible to run infer code from within `ocaml`/`utop`. Integration is really basic, but we can extend it if we find it useful.
Reviewed By: jberdine
Differential Revision: D3736029
fbshipit-source-id: 4cebb7c
Summary:
Infer doesn't go looking into field values when looking for unsigned
expressions, which could cause some unintended reports.
Reviewed By: sblackshear
Differential Revision: D3724232
fbshipit-source-id: 9c4cd97
Summary:
The error code was always 1, and was only enabled in crashcontext mode due to a
typo.
Reviewed By: sblackshear, lazaroclapp
Differential Revision: D3735661
fbshipit-source-id: c0bb0f5
Summary:
This helps avoid some unintended reports where the actual is known to point to
a specific object before a call to a skipped function. This requires a change
in the plugin to export more info about const types.
Reviewed By: dulmarod
Differential Revision: D3711901
fbshipit-source-id: f5c903e
Summary:
Adding a new mode linters. Now if the analyzer is linters, we do the linters and don't translate,
then, if the analyzer is Infer, we do the translation and the backend and not the linters checks, and the
default is that we do capture, backend and lint checks.
Made the tests separated, which saves time and also shows that the linters mode works.
Reviewed By: jvillard
Differential Revision: D3723472
fbshipit-source-id: 9d828d8
Summary: With this approach, all the global consts will be inlined in the places where they are used.
Reviewed By: dulmarod
Differential Revision: D3703133
fbshipit-source-id: 3c19479
Summary:
Make checks context-aware, to increase flexibility.
As an example application of this change, whenever an atomic property is accessed from within a synchronized block, skip reporting a `DIRECT_ATOMIC_PROPERTY_ACCESS` warning.
Reviewed By: jvillard
Differential Revision: D3648831
fbshipit-source-id: c033f45
Summary: Follow up D3579581. We forget about memory acquired in resources with assumption that developers use raii and free memory in destructors.
Reviewed By: jvillard
Differential Revision: D3614056
fbshipit-source-id: 08fa112
Summary:
Previously, we would translate `throw` with `return`. However, `throw` in
ObjC/C++ is often used to mean "abort". We now translate `throw` the same as
`exit` to prune these paths.
Reviewed By: akotulski
Differential Revision: D3594156
fbshipit-source-id: 81083bb
Summary:
Minor stuff:
- GCCAst -> GCCAsm
- separate constants and mutable global state in cFrontend_config
- alphabetical ordering in cFrontend_config
Reviewed By: akotulski
Differential Revision: D3593858
fbshipit-source-id: 6f4d9c3
Summary:
No longer allow pointer types to be passed inside var_exp_typ. We used to accept both forms,
but it won't be possible any longer once shared_ptr becomes pointer type.
Reviewed By: dulmarod
Differential Revision: D3593003
fbshipit-source-id: a830914
Summary:
Python needs to know about these because it does different things depending on
whether these flags are passed or not.
Reviewed By: cristianoc
Differential Revision: D3593381
fbshipit-source-id: fe3194d
Summary:
When analyzing C model in C++, we were seeing some SKIP function triggered by generated constructors/operators= for C structs.
In C they weren't present, but in C++ compiler generates them for us. To avoid this (and future) problems
with models, translate all functions that are needed when computing the model
Reviewed By: dulmarod
Differential Revision: D3561873
fbshipit-source-id: f8ad2a0
Summary:
Backend has the same treatment for all Typ.Int types and so UnaryOperator
should be translated the same for all of them
Reviewed By: jvillard
Differential Revision: D3534277
fbshipit-source-id: 8569b65
Summary:
Call infer with `--unsafe-malloc` or set `unsafe-malloc: true,` in .inferconfig to
have infer assume that `malloc()` never returns null.
closes#389
Reviewed By: jberdine
Differential Revision: D3522169
fbshipit-source-id: 6b88a16
Summary:
To specify a new flag to run some test using our framework, one currently has
to add a new argument to the method that runs Infer and modify existing methods
to give a default value to that argument everywhere. With this diff, it's
possible to just specify extra arguments as parameters to
`createCInferCommand()` et al.
Reviewed By: martinoluca
Differential Revision: D3522161
fbshipit-source-id: 1499fc2
Summary:
This call was producing confusing false positives when deleted object was possible to be null.
Changing frontend to add that check is not trivial so I turned it off for now (we don't handle
destructors in other cases anyway)
Reviewed By: dulmarod
Differential Revision: D3509354
fbshipit-source-id: c23dc81
Summary:
When clang instantiates template function with argument pack, it will
give the same name to all parameters coming from the pack. To avoid
name collisions, always add index of argument's position to mangled part
of the variable.
Seemingly unrelated changes are to make existing tests pass (don't use
simple variable name where it matters)
Reviewed By: dulmarod
Differential Revision: D3503608
fbshipit-source-id: 794093a
Summary: Those functions have simple enough implementations for infer to understand them
Reviewed By: jvillard
Differential Revision: D3463084
fbshipit-source-id: f84160f
Summary:
Assume that std::vector::resize will always create nonempty vector. While this is clearly
wrong for resize(0), it removes many FPs for `resize(n)` calls, where value of `n` is unknown.
Without it, infer was thinking that `n` could be 0 and reported empty vector access.
Reviewed By: jvillard
Differential Revision: D3424355
fbshipit-source-id: cb476de
Summary:
Array types where the length is not statically known were represented
using fresh variables. This diff:
- Makes array type length optional, reducing the amount of work needed
for renaming, substitution, and normalization.
- Revises uses of array length so that the length component of a
Tarray type represents only the statically determined constant
length of an array type, and the length component of a Sizeof
expression represents the dynamically determined length of an array
value.
- Restricts the type of static lengths from a general expression
(Sil.exp) to an integer (Sil.Int.t), enforcing that static types are
constant. This in particular ensures that types contain no
variables, and so are invariant under operations such as renaming
and substitution.
- Removes the type substitution and renaming functions typ_sub,
typ_normalize, and typ_captured_ren. Now that array type lengths
are constant integers, all of these functions are the identity.
Reviewed By: cristianoc
Differential Revision: D3387343
fbshipit-source-id: b5db768
Summary:
The extra dereference in stmtexpr was wrong. When a dereference is needed, we have a cast.
This was causing one dereference too many, and creating wrong results.
Reviewed By: akotulski
Differential Revision: D3393294
fbshipit-source-id: 7a1ec8e
Summary:
Use the output of `clang -###` to drive which commands to run. Attach the plugin to all commands starting with `-cc1`.
Benefits:
- support for compiling multiple files in one clang command, eg `infer -- clang -c file1.c file2.c`
- support for compile commands that do not target a `.o` file, eg `infer -- clang -S hello.c`
- support for `-cc1` compile commands
- more generally, run all commands that clang would run, and attach plugin in all compilation cases
Reviewed By: martinoluca
Differential Revision: D3366912
fbshipit-source-id: 98d5e3b
Summary:
This removes some boilerplate and duplicated code and makes it easier to add
more tests.
Reviewed By: martinoluca, jeremydubreil
Differential Revision: D3365807
fbshipit-source-id: 9a2e0e5
Summary:
Now all code in tests is reachable by the analyzer which increases
test quality.
Reviewed By: dulmarod
Differential Revision: D3358591
fbshipit-source-id: d54877e
Summary:
When syntax highlighting the source excerpts that Infer prints on stdout, we
would crash if `pygments.lexers` did not find a suitable class given the name
of the source file. Instead, do not colorize when that's the case.
Reviewed By: martinoluca
Differential Revision: D3358115
fbshipit-source-id: ccb9b41
Summary:
Pass object by reference every time struct object is passed by value
in C++. Do it only for C++/objC++ where we have guarantee that the
object which is passed will be temporary one (created by copy constructor).
Reviewed By: jberdine
Differential Revision: D3346271
fbshipit-source-id: d3e5daa
Summary:
Make analyzer find out when null dereference comes from std::vector method.
If it does, it means that it's really empty vector access (due to the
way infer models std::vector)
Reviewed By: sblackshear
Differential Revision: D3327933
fbshipit-source-id: b9e11d6
Summary:
Turns out, analyzer was getting confused with complicated
model and it was reporting empty access in places it
shouldn't. Fixing backend is not trivial (tracing mode is the answer),
but the model can be simplified.
It introduces the problem that get() method doesn't return fresh value
every time, but we should be able to change backend later to deal with it.
Reviewed By: sblackshear
Differential Revision: D3328228
fbshipit-source-id: dddbaf8
Summary:
Part of the migration of .inferconfig-specific options into options accepted
both by .inferconfig and the CLI.
Reviewed By: jberdine
Differential Revision: D3304783
fbshipit-source-id: 4a7ee6f
Summary:
Create model of C++ std::vector to find occurrences when vector which might be empty is accessed. Do it by triggering null dereference every time empty vector access is performed.
Note: model will be used only when c++11 (or c++14) are used.
Reviewed By: sblackshear
Differential Revision: D3276203
fbshipit-source-id: 420a95a
Summary:
- [python] decode strings coming from `os.*` commands
- [python] decode strings coming from the command-line
- [python] encode a few remaining unicodes into strings
- [java] replace lex/yacc parser for javac verbose output by regex-based matching to handle unicode in paths
- [make] random fix of `make test` to have `make clean test` work
- [integration tests] add e2e build integration tests for utf8 in the PWD
Closes#76
Reviewed By: martinoluca
Differential Revision: D3240809
fb-gh-sync-id: 8c2e1ed
fbshipit-source-id: 8c2e1ed
Summary:
The philosophy of the tracing mode reporting is to not report the errors in a method if reaching this error does depend on information that can be false at call site. Typically with:
void foo(Object obj, int x) {
if (x == 3) {
obj.toString();
}
}
it may be that we always call `foo` with a non-null parameter or `x != 3`.
Thechnically, the reporting code matches the pairs of the form (precondition, error) and filtering out the cases where the precondtions was not imposing constraints on the calling context, and report the other cases. So the NPE could be reported in the following case:
void bar() {
foo(null, 3);
}
However, we were missing the case where there was anyway no way to call a method in a safe way, i.e. all the preconditions were of the form: (precondition, error), for example:
void baz(boolean b) {
if (b) {
foo(null, 3);
} else {
foo(null, 3);
}
}
In that case, the summary is of the form
PRE (1): b = false
POST: NullPointerException
PRE (2): b = true
POST: NullPointerException
In which case it is legit to report `NullPointerException` in `baz`.
Reviewed By: sblackshear, jberdine
Differential Revision: D3220501
fb-gh-sync-id: 7fb7d70
fbshipit-source-id: 7fb7d70
Summary: Example of dynamic dispatch with interfaces were already working. Adding some tests now so that we don't break this.
Reviewed By: sblackshear
Differential Revision: D3220360
fb-gh-sync-id: 11395dd
fbshipit-source-id: 11395dd
Summary:Local variable created by conditional operator translation is now declared in scope of whole
procedure. Semantically there is no difference, hopefuly backend will not complain about this
change. Also, nullifying that variable is deferred to preanalysis instead of calling it manually
Reviewed By: jvillard
Differential Revision: D3155733
fb-gh-sync-id: 6cec8fc
fbshipit-source-id: 6cec8fc
Summary: For performance critical sections of the code, this checker detects memory allocations or calls to methods annotated as expensive. However, such cases of memory allocations or expensive calls are acceptable is occuring in rare cases. This diff adds supports for the "unlikely" branch prediction method and does not track expensive calls in unlikely branches.
Reviewed By: sblackshear
Differential Revision: D3193473
fb-gh-sync-id: ea87e49
fbshipit-source-id: ea87e49
Josh Berdine
Sam Blackshear
Andrzej Kotulski
Jules Villard
Cristiano Calcagno
Peter O'Hearn
Dino Distefano
Ryan Rhee
Jeremy Dubreil
Dulma Churchill
Martino Luca
Lázaro Clapp Jiménez Labora
Daiva Naudziuniene