Summary: I missed that codepath and it lead to NULL_DEREFERENCE errors when in fact they should be EMPTY_VECTOR_ACCESS
Reviewed By: jvillard
Differential Revision: D3340627
fbshipit-source-id: 52ae85f
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:
Optimize retries in deserialization by opening the file only once
instead of once per retry. Also ensure that the file is closed on
failure. This reduces memory leaked for unclosed channels.
Reviewed By: jvillard, cristianoc
Differential Revision: D3321132
fbshipit-source-id: 05e6ff0
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: Fix apparent bug in sym_eval, where struct fields could be reversed.
Reviewed By: cristianoc
Differential Revision: D3333035
fbshipit-source-id: 4ccc859
Summary:
The typ_iter_types, exp_iter_types, and instr_iter_types functions of
Sil are unused.
Reviewed By: cristianoc
Differential Revision: D3332878
fbshipit-source-id: e8d8f71
Summary:
Optimize attribute loading by caching all attributes read from file in
memory. This reduces io and allocation rate and raises memory usage.
Reviewed By: cristianoc
Differential Revision: D3321156
fbshipit-source-id: 37bc6bc
Summary:
End of the migration of .inferconfig-specific options into options accepted
both by .inferconfig and the CLI.
Reviewed By: jberdine
Differential Revision: D3304798
fbshipit-source-id: 14f6833
Summary:
Part of the migration of .inferconfig-specific options into options accepted
both by .inferconfig and the CLI.
This changes the behaviour of Infer in that we now create matchers eagerly
instead of lazily. I think it's ok because I suspect what's really important is
not laziness but memoisation, and thus laziness was just an implementation
detail. If I'm wrong please yell, it should be easy to revert to a lazy
behaviour if really needed.
Reviewed By: jberdine
Differential Revision: D3304792
fbshipit-source-id: 1ddde6d
Summary:
Part of the migration of .inferconfig-specific options into options accepted
both by .inferconfig and the CLI.
Reviewed By: jberdine
Differential Revision: D3304785
fbshipit-source-id: e0204e9
Summary:
Part of the migration of .inferconfig-specific options into options accepted
both by .inferconfig and the CLI.
Reviewed By: jberdine
Differential Revision: D3322508
fbshipit-source-id: 1820a9d
Summary:
Part of the migration of .inferconfig-specific options into options accepted
both by .inferconfig and the CLI.
Reviewed By: jberdine
Differential Revision: D3304784
fbshipit-source-id: 0c39b39
Summary:
- `test_build` now also test that the OSS build works if we're inside the internal repo
- remove some "if java/clang" in the test targets, since tests work under the
assumption that all the analyzers are to be tested.
Reviewed By: jberdine
Differential Revision: D3305088
fbshipit-source-id: 142fc49
Summary: This is basically not used and removing it makes the Makefiles slightly less convoluted.
Reviewed By: jberdine
Differential Revision: D3322376
fbshipit-source-id: 2d7c1f8
Summary:
`make clean all test` worked, but not `make clean test` because `test` only
builds stuff in infer/src/ (no models, no infer/bin/infer). For now, fix the
workflow by building both `infer` and `test_build` in different directories (so
they can be parallelized).
Reviewed By: jberdine
Differential Revision: D3322797
fbshipit-source-id: 71d146d
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:
Any option accepted by infer/InferAnalyze/... can now appear in
.inferconfig and will be interpreted accordingly. Options in .inferconfig
are overriden by both env vars parameters and command line
arguments.
To achieve this, we do a first round of parsing that only acts on the
flags necessary to find out where .inferconfig lives. Then we serialise
the contents of the json file into the format expected by command-line
arguments, and use a trick similar to the way we handle env variables to
interpret the json arguments.
Reviewed By: jberdine
Differential Revision: D3298379
fbshipit-source-id: 12b7d57
Summary:
Build everything at once all the time. This removes the need for multiple
directories, which were a hassle to begin with.
This removes the `java`, `clang`, and `llvm` targets in various Makefiles as
well.
Reviewed By: jberdine
Differential Revision: D3317230
fbshipit-source-id: 8e86140
Summary:
Now we can add to inferconfig an option
skip-translation-file to skip completely the translation
and analysis of some file.
Reviewed By: jberdine
Differential Revision: D3311129
fbshipit-source-id: 58fd179
Summary:
Add a Makefile to convert files to reason, to help with rebasing over
the conversion.
Reviewed By: jvillard
Differential Revision: D3316674
fbshipit-source-id: 8abcbe0
Summary: This way we don't need to make the file be valid json later on.
Reviewed By: jeremydubreil
Differential Revision: D3304998
fbshipit-source-id: 25deb5c
Summary:
If we see a read of a field f annotated with GuardedBy("mLock"), we spring into action.
What we do is look for some hpred `A.mLock |-> B` and return `B` as the "guarded-by object".
Once we have models for montitorenter/exit in place, `B.__inferIsLocked = true` will mean "lock held", and `B.__inferIsLocked = false` will mean "lock not held".
Reviewed By: jvillard
Differential Revision: D3316288
fbshipit-source-id: 8625e04
Summary:
Parse the inferconfig_home and project_root options in a separate phase
before other options. This enables using their values to e.g. find the
inferconfig file and process it prior to full option parsing.
Reviewed By: jvillard
Differential Revision: D3302143
fbshipit-source-id: a1f9175
Summary:
Non-fatal warnings are only checked by `make -C infer/src test_build`,
which should be part of `make test`
Reviewed By: sblackshear
Differential Revision: D3301913
fbshipit-source-id: 8196e03
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:
The checkers check was causing perf issues because it kept loading the json of
inferconfig. To prevent this from happening again, load json files inside
config.ml, and only export `Yojson.Basic.json Lazy.t` values to other modules.
Also move the list of checks disabled by default into config.ml for better
discoverability.
Reviewed By: jberdine
Differential Revision: D3293041
fbshipit-source-id: 4a38b26
Summary:
F for files, . for procedures, and a few more for developer mode.
Also add the crash message to the crash symbol, because if infer crashes we
want as much information as possible.
```
$ infer -- javac Hello.java
Starting analysis (Infer version v0.8.1-8e8c6fa)
legend:
"F" analyzing a file
"." analyzing a procedure
F..
Analyzed 1 file
Found 1 issue
Hello.java:13: error: NULL_DEREFERENCE
object s last assigned on line 12 could be null and is dereferenced at line 13
11. int test() {
12. String s = null;
13. > return s.length();
14. }
15. }
16.
Summary of the reports
NULL_DEREFERENCE: 1
$ infer -g -- javac Hello.java
...
Starting analysis (Infer version v0.8.1-8e8c6fa)
legend:
"F" analyzing a file
"." analyzing a procedure
"C" analyzer crashed
"T" timeout: procedure analysis took too much time
"S" timeout: procedure analysis took too many symbolic execution steps
"R" timeout: procedure analysis took too many recursive iterations
...
```
Reviewed By: sblackshear
Differential Revision: D3288081
fbshipit-source-id: becea34
Summary:
Reimplement command line options in preparation for uniformly passing
options from the top-level infer driver that invokes a build command
through the build system to the descendant infer processes.
All command line options of all executables are collected into Config,
and declared using a new CommandLineOption module that supports
maintining backward compatibility with the current command line
interface. Very few values representing command line options are
mutable now, as they are set once during parsing but are constant
thereafter. All ordering dependencies are contained within the
implementation of Config, and the implementation of Config is careful to
avoid unintended interactions and ordering dependencies between options.
Reviewed By: jvillard
Differential Revision: D3273345
fbshipit-source-id: 8e8c6fa
Summary:
Infer prepends the directory containing the ananotation processor and
the current working directory to the classpath javac option. This diff
enables prepending these to the classpath when it is passing in an args
file (as the classpath can get too long to pass on the command line).
Reviewed By: jvillard
Differential Revision: D3270348
fbshipit-source-id: 208077f
Summary:
Add a module target to the src Makefile that builds a single module and
its dependencies, perhaps with extra flags. Useful for generating
assembly or interfaces, as well as directing the typechecker when
refactoring.
Execute: `make INFER_CFLAGS=<flags> M=<Module>.cm{o,x} module`
Reviewed By: jeremydubreil
Differential Revision: D3273437
fb-gh-sync-id: 65a51d6
fbshipit-source-id: 65a51d6
Summary:
Handle building in debug mode by passing command line options set in
the Makefile, as all the other configuration of ocamlbuild is done
through command line options.
Reviewed By: jvillard
Differential Revision: D3202085
fb-gh-sync-id: d467019
fbshipit-source-id: d467019
Summary:
The computation of the perf stats file did not work in case -cluster was
passed a (relative) path.
Also, do not fail if the perf stats file cannot be opened/written, just
log a warning to stdout.
Reviewed By: jvillard
Differential Revision: D3269727
fb-gh-sync-id: c141ffa
fbshipit-source-id: c141ffa
Summary: Create "empty" vector model header. The actual model implementation will come in next diffs to simplify review process.
Reviewed By: dulmarod
Differential Revision: D3240683
fb-gh-sync-id: 03ee002
fbshipit-source-id: 03ee002
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:
Results of AbsInt checkers are node id -> abstract state maps.
It's hard to compare/combine the results of multiple analyses if the node id types are different.
Needed for the upcoming improvements of the preanalysis.
Reviewed By: jvillard
Differential Revision: D3235669
fb-gh-sync-id: c5251cf
fbshipit-source-id: c5251cf
Summary:
The case where the right hand side of the `Letderef` expression is an identifier was missing. With this diff, the following example is now working as expected:
class A {
public Object foo() {
return new Object();
}
}
class B extends A {
public Object foo() {
return null;
}
}
public class Test {
static Object bar(A a) {
return a.foo();
}
static void shoulReport() {
B b = new B();
bar(b).toString();
}
}
using the command:
INFER_LAZY_DYNAMIC_DISPATCH=1 infer -- javac Test.java
Reviewed By: sblackshear
Differential Revision: D3238986
fb-gh-sync-id: d6059fb
fbshipit-source-id: d6059fb
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: So that we no longer have to run `Tabulation.prop_is_exn` before running `Tabulation.prop_get_exn_name`.
Reviewed By: jberdine
Differential Revision: D3222545
fb-gh-sync-id: a7faa06
fbshipit-source-id: a7faa06
Summary:
As suggested in the discussion https://github.com/facebook/infer/issues/326 this pull request implements
```ocaml
get_overriden_method : Tenv.t -> Procname.java -> Procname.t
```
to get the method of a superclass that is being overridden by a specific java pname.
I thought of unit test this, but unfortunately I wasn't able to figure out how to create the proper context with OUnit2. Perhaps the easiest way to test this will be integration tests.
Feel free to reject the pull request if unit tests are mandatory (or for any other reason, of course).
Closes https://github.com/facebook/infer/pull/341
Reviewed By: jeremydubreil
Differential Revision: D3221254
Pulled By: sblackshear
fb-gh-sync-id: 9c26258
fbshipit-source-id: 9c26258
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:
I ran perf on rocksdb analysis and found out that ~40% of time is spent inside ocaml GC originating
from Prop.typ_normalize.
After this change, profile shows that GC is ~2% and Prop.typ_normalize takes 50% of the time.
Reviewed By: jberdine
Differential Revision: D3219113
fb-gh-sync-id: 27c34d9
fbshipit-source-id: 27c34d9
Summary: Provide possibility to replace clang internal headers path if they are overwritten by `-isystem`. User needs to specify path to wrong headers to be replaced with infer's clang.
Reviewed By: martinoluca
Differential Revision: D3212850
fb-gh-sync-id: be3d51c
fbshipit-source-id: be3d51c
Summary:Open-source clang has caught up a bit with apple's clang, so we don't need to
filter as many compilation flags as we used to.
Reviewed By: akotulski, martinoluca
Differential Revision: D3212553
fb-gh-sync-id: 5638dc8
fbshipit-source-id: 5638dc8
Summary:This enables controlling the encoding chosen by infer via the usual environment
variables. For instance:
```
LC_ALL="C" infer ... # sets LOCALE to "ascii"
LC_ALL="en_US.UTF-8" infer ... # sets LOCALE to "UTF-8"
```
This gives an easy solution to #320: run `LC_ALL="en_US.UTF-8" infer ...`.
Right now the only solution is to edit the Python scripts by hand instead!
Reviewed By: jberdine
Differential Revision: D3207573
fb-gh-sync-id: 62d5b98
fbshipit-source-id: 62d5b98
Summary:stdlibc++ headers didn't like the fact that hash<unique_ptr> didn't have defined operator() directly.
Do that and provide empty body. Keep inheritance in case it helps compilation to succeed.
Reviewed By: dulmarod
Differential Revision: D3207721
fb-gh-sync-id: 8c950da
fbshipit-source-id: 8c950da
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:`exc.output` can be (always is?) `None`. Other places in the code only print
using `traceback.print_exc()` and this was the only place trying to print this
extra info (`git grep CalledProcessError`). This caused `utils.stdout()` to
raise an exception, which was further confusing.
closes#330
Reviewed By: jberdine
Differential Revision: D3203896
fb-gh-sync-id: d2988d8
fbshipit-source-id: d2988d8
Summary:It turns out, apple clang turns off cxx-modules under the hood. Open source clang doesn't do it by default
and we need to do it ourselves.
Reviewed By: jvillard, martinoluca
Differential Revision: D3201604
fb-gh-sync-id: 82cea0f
fbshipit-source-id: 82cea0f
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
Summary:InferPrint has a special case code path that does not add results_dir to
the specs_library if it is the default. This seems to be unnecessary.
Reviewed By: jeremydubreil
Differential Revision: D3195088
fb-gh-sync-id: 67e968a
fbshipit-source-id: 67e968a
Summary:BinaryConditionalOperator should evaluate condition expression once, but we used to evaluate it twice.
Fix translation to account for it.
Reviewed By: dulmarod
Differential Revision: D3179803
fb-gh-sync-id: a801a7e
fbshipit-source-id: a801a7e
Summary:Improve the error traces so that:
- the error get reported on the first offending call, which is more intuitive for inline comments
- the traces now jump from call location to callee definition and so forth until the end of the call stack
Reviewed By: sblackshear
Differential Revision: D3183756
fb-gh-sync-id: 089ddaf
fbshipit-source-id: 089ddaf
Summary:This diff translate cpp lambdas. For the moment it does not take care of
captured variables. Captured variables will come in the next diff.
Reviewed By: dulmarod
Differential Revision: D3114790
fb-gh-sync-id: bf36450
fbshipit-source-id: bf36450
Summary:Make node ids be `private int` to make sure we don't mix them with random
integers from other sources.
Reviewed By: sblackshear, cristianoc
Differential Revision: D3179670
fb-gh-sync-id: 4bcf4f0
fbshipit-source-id: 4bcf4f0
Summary:This wasn't used anywhere. Frontends that wish to do something like goto can
just set the targets of the goto as successors of the current node, no need for
a special instruction to do that.
Reviewed By: sblackshear
Differential Revision: D3179826
fb-gh-sync-id: 572a6f2
fbshipit-source-id: 572a6f2
Summary:public
When a conditional is the last instruction, there will be a join node leading directly to the exit node.
Some instructions, such as nullification of dead variables, and abstraction, are added to the control flow graph automatically. But, join nodes cannot contain instructions. So when a procedure ends with a conditional, there might be no place to store these instructions.
This diff adds one extra node between the join and the exit node in that situation.
Reviewed By: jvillard
Differential Revision: D3179056
fb-gh-sync-id: 2b9cd7e
fbshipit-source-id: 2b9cd7e
Summary:public
This extends infer/src/Makefile with a mod_dep.dot target that builds a
dot graph of module dependencies.
This also adds ocamldot, which is in the public domain and available
from http://trevorjim.com/projects/ocamldot/ocamldot.tar .
Reviewed By: cristianoc
Differential Revision: D3168488
fb-gh-sync-id: 267fb0e
fbshipit-source-id: 267fb0e
Summary:public
The code:
DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(file)));
creates a resource with `FileInputStream()` and wraps it twice as a field of `BufferedInputStream` and then as a field of `DataInputStream`. Then calling:
in.close();
needs to go down the wrappers hierachy: `DataInputStream.close()` -> `FilterInputStream.close()` which then calls `BufferedInputStream.close()` -> `FilterInputStream.close()` -> `FileInputStream.close()`.
Going down the wrapper was not working before because `FilterInputStream.close()` was only going further when the type of field `in` was `FileInputStream` wheras it should also continue when the type of the field is any subtype of `FilterInputStream`, e.g. `DataInputStream` and `BufferedInputStream` like in the test example. This diff fixes this last aspect.
Reviewed By: sblackshear
Differential Revision: D3174822
fb-gh-sync-id: 3adbb7e
fbshipit-source-id: 3adbb7e
Summary:public
Report statistics on consumed time and memory in results_dir/perf_stats.json.
Reviewed By: martinoluca
Differential Revision: D3162381
fb-gh-sync-id: e802faa
fbshipit-source-id: e802faa
Cristiano Calcagno
Jeremy Dubreil
Daiva Naudziuniene
Sam Blackshear
Dulma Churchill
Andrzej Kotulski
Dino Distefano
Josh Berdine
Jules Villard
Peter O'Hearn
Luis Cruz