Summary:
SIOF is only for interactions between objects of non-POD types. Previously the
checker was also reporting for POD types.
Reviewed By: akotulski
Differential Revision: D4197620
fbshipit-source-id: 7c56571
Summary:
clang errors would get diverted to log files instead of being printed on the
console. Also log other types of clang errors and warnings more often.
Before:
$ infer -- clang -c nosuchfile.c
$ # nothing gets printed, exit code set to 1
After:
$ infer -- clang -c nosuchfile.c
clang-4.0: error: no such file or directory: 'nosuchfile.c'
Also print more messages in case of compilation errors:
$ echo ')' >> a.c
$ infer -- clang -c a.c
a.c:1:1: error: expected identifier or '('
)
^
1 error generated.
Error: the following clang command did not run successfully:
'/home/jul/infer/facebook-clang-plugins/clang/install/bin/clang-4.0' "@/home/jul/infer/examples/infer-out/clang/clang_command_2a0a84.txt"
(only the last 2 lines are new)
Reviewed By: akotulski
Differential Revision: D4183039
fbshipit-source-id: b9a9065
Summary: clang has very complicated logic what to translate based on `project_root` and filename. Add tests for different situations in regard of symbolic links in path/project_root
Reviewed By: jvillard
Differential Revision: D4168551
fbshipit-source-id: 586b364
Summary: Speed up capture on MacOS by caching results of realpath. Improvements to lint speed on MacOS will be sent later
Reviewed By: jvillard
Differential Revision: D4166902
fbshipit-source-id: 4d065bc
Summary:
- set SHELL to bash explicitly in Makefiles (Debian uses dash)
- avoid using system headers when using our own clang's headers in tests
- do not rely on the name of the object file to write the frontend debugging scripts. It turns out that `-o` is *not* always present in the arguments of `-cc1` functions so the `Option.get` could crash. Since we don't actually need to get the object file name, just a nice enough name, don't try to be smarter at guessing what object will be created and pick a different name built from the source name instead.
Reviewed By: akotulski
Differential Revision: D4159516
fbshipit-source-id: c7bc2b9
Summary:
It was defined in two places and I'm about to add a third, so let's share
instead.
Reviewed By: sblackshear
Differential Revision: D4153420
fbshipit-source-id: 3d2c519
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:
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: 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:
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:
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: This is assumed everywhere, and so set it in `ClangWrapper` instead of `InferClang`
Reviewed By: jberdine
Differential Revision: D4095766
fbshipit-source-id: f77625e
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:
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: 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:
- 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: 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:
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:
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: This avoids issues where the command-line may get too large.
Reviewed By: jberdine
Differential Revision: D4008328
fbshipit-source-id: c1558b9
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:
During the development/debugging of AST checks, it will be possible to emit dotty graphs with a representation of the evaluation of formulas.
The formulas, expressed using the notation of CTL (https://en.wikipedia.org/wiki/Computation_tree_logic) are represented in a graph alongside the current ast-node and their final evaluation result (green for true, red for false)
To get the dotty graph, run infer with the `--debug` flag
Reviewed By: ddino
Differential Revision: D3937787
fbshipit-source-id: 163e17d
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: it seems to have no effect on analysis. As such it should be ok to add cg nodes for builtin model calls
Reviewed By: jberdine
Differential Revision: D3967399
fbshipit-source-id: 06c32e5
Summary:
This is needed for later: InferClang will no longer be started once for each
source file to be analysed. Instead, it will be called to analyse several files
at once, and will analyse them one by one. Thus, `clang_lang` and `source_file`
are moved to `cFrontend_config` as references.
The biggest change this entailed was the new logging infrastructure, which was
depending on `Config.source_file`. This diff moves the logic entirely to
`Logging`, and changes the API so that executables wishing to log into files
have to set it up using `Logging.set_log_file_identifier`. This can be called
several times during the execution, allowing to dynamically change the log file
(eg, when analysing several source files one by one!).
Reviewed By: jberdine
Differential Revision: D3944148
fbshipit-source-id: 6129090
Summary: That data was never used and removing it can simplify frontends quite a bit.
Reviewed By: jberdine
Differential Revision: D3967389
fbshipit-source-id: d65c3da
Summary:
- Use the module types in cModule_types.ml instead of redefining them.
- A few occurrences of \n in formatted output replaced by @\n to let the
formatter know of line breaks (by no means complete, these were just a few I
came across while doing something else)
Reviewed By: jberdine
Differential Revision: D3944081
fbshipit-source-id: 4460427
Summary:
This diff introduces a first version of a front-end checkers specification
language. The language is based on the CTL temporal logic that is interpreted
on trees. In this case the model for a formula is the AST of the program produced
by clang.
This diff introduce the language and translate most of the existing checks on
this new language. In other diff I will translate all the other checks.
Then I will generalize the framework to allow the developer to specify only
the CTL formula.
Reviewed By: martinoluca
Differential Revision: D3819211
fbshipit-source-id: f8e01eb
Summary:
Change Sil.Call instruction to have only a single optional return
identifier, insted of a list. Essentially none of the code handled
multiple return identifiers. Also, add the type of the return
identitifier to Call instructions.
Reviewed By: sblackshear
Differential Revision: D3919358
fbshipit-source-id: d2d4f72
Summary:
Refactor Sil.struct_typ and associated operations into a separate
StructTyp module. This is possible now that Typ.Tstruct only carries a
type name instead of the definition directly, and is helpful to simplify
module dependencies.
Reviewed By: cristianoc
Differential Revision: D3919357
fbshipit-source-id: a37a656
Summary:
It is no longer necessary to keep the name of a struct within the
struct, as the name will just have been used to look it up.
Reviewed By: cristianoc
Differential Revision: D3919355
fbshipit-source-id: ab65168
Summary:
The global reference `DB.current_source` is used internally in the module DB, by all the front-ends, and directly and indirectly by the back-end, including saving and restoring the state in case of on-demand procedure calls. In particular, it is heavily used in printing functions.
This diff cleans up the flow of information about what the current file is, making it explicit, and removes the reference.
Reviewed By: jberdine
Differential Revision: D3901247
fbshipit-source-id: ef596bd
Summary:
This diff removes the redundancy in the representation of types where
struct types could be represented either directly using Tstruct or
indirectly using Tvar to refer to the type environment. A consequence
is that it is much harder to construct large type values.
Reviewed By: sblackshear, cristianoc
Differential Revision: D3839753
fbshipit-source-id: cf04ea5
Summary:
Rename Typ.mk_struct to internal_mk_struct, and add Tenv.mk_struct that
ensures types are added to the environment under the right name.
Reviewed By: cristianoc
Differential Revision: D3791865
fbshipit-source-id: fd4b667
Summary:
The Typ.struct_typ.csu field is now redundant with the Csu.t in the
name: Typename.t field.
Reviewed By: cristianoc
Differential Revision: D3791861
fbshipit-source-id: 5370885
Summary: Replace the struct_name: Mangled.t option field of Typ.struct_typ with name: Typename.t
Reviewed By: sblackshear
Differential Revision: D3791860
fbshipit-source-id: 3ee1d00
Summary:
Given that mangling now respects `extern "C" {}` declarations, pnames of C function will have no mangling and we don't need to discard mangled part from procname.
Move `malloc` detection to `get_builtin_pname_opt` function (together with all others)
Reviewed By: dulmarod
Differential Revision: D3804402
fbshipit-source-id: 9ae9991
Summary:
There were overly complex and different ways of identifying C++/objC languages. Simplify and unify them.
How I came up with naming - there are two languages C and C++. You can apply "Objective-" extention to both of them.
We usually need to differentiate C and C++ (different AST) and whether it's extended (checks specific to ObjC)
Reviewed By: dulmarod
Differential Revision: D3804457
fbshipit-source-id: 685e40a
Summary:
ti_raw field tends to grow exponensially for template instantiations.
ASTexporter no longer gives this bit of information and infer needs to stop using it.
Reviewed By: jvillard
Differential Revision: D3798192
fbshipit-source-id: ba7cbb9
Summary:
We already have logic that deals with adding custom procnames in `function_deref_trans`. This diff simplifies `callExpr_trans` and removes
complex logic responsible for finding type of function.
There is no functional change intended (it will come in future diffs)
Reviewed By: dulmarod
Differential Revision: D3797839
fbshipit-source-id: 21fc13f
Summary:
Translate code coming from std::headers only when it's reachable from user code during translation.
This way, we reduce number of functions analyzer sees and decreases size of cfg/number of .attr files
Reviewed By: jvillard
Differential Revision: D3797550
fbshipit-source-id: 2a9eb4c
Summary: This breaks a dependency to allow cFrontend_utils.ml to call into cLocation.ml.
Reviewed By: sblackshear
Differential Revision: D3779514
fbshipit-source-id: 6ca83d6
Summary: Fix pattern matching of the `parameters` field of `DeprecatedAttr`
Reviewed By: akotulski
Differential Revision: D3782788
fbshipit-source-id: df8dd40
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:
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 necessary changes so that the clang frontend compiles with the
corresponding changes to the facebook clang plugins. Does not actually use the
extra qualifier information yet.
depends on D3684150
Reviewed By: akotulski
Differential Revision: D3684173
fbshipit-source-id: f715f75
Summary:
Enable warning 23 (Useless record with clause), make fatal, and fix the
existing instance.
Reviewed By: sblackshear
Differential Revision: D3685950
fbshipit-source-id: 8ee415d
Summary:
Move the Sil.attribute type and associated types and operations to a new
PredSymb module.
Reviewed By: cristianoc
Differential Revision: D3683834
fbshipit-source-id: d3606a8
Summary:
Cosmetic changes to comments to improve the results of the Reason
comment attachment logic.
These were found using `git grep -nH -e 'in[ ]*(\*'` although the
attachment logic seems ok if the associated `let` is on the same line.
Some others were found with `git grep -nH -e ')[ ]*(\*'` although the
attachment logic seems ok if the associated `(` is on the same line.
Reviewed By: jvillard
Differential Revision: D3654027
fbshipit-source-id: 122aa3b
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:
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:
1. Attempt to simplify callExpr_trans by merging multiple if-else branches into one in `CTrans_utils.builtin_trans`. Not every special case works that way, so some of them are still there.
2. On top of that, make type of parameters in `CTrans_models` functions `Procname.t` instead `Procname.t option`. This triggered some more changes to `callExpr_trans`.
3. Semi-randomly reorder instructions in `callExpr_trans`
This is mainly an attempt to clean up the code so any suggestions how to make it better are welcome.
Reviewed By: jvillard
Differential Revision: D3586419
fbshipit-source-id: aef8580
Summary:
Store more information inside Procname.objc_cpp type: replace mangling info
with "kind" info, which also contains mangling info when appropriate.
Reviewed By: akotulski
Differential Revision: D3580283
fbshipit-source-id: b1197ed
Summary: ClassTemplateSpecializationDecl now contains structures information about the specialization
Reviewed By: jvillard
Differential Revision: D3586446
fbshipit-source-id: d567a0b
Summary:
Use Itanium mangling for C++ functions/methods instead of raw type name. This is a step towards removing expensive `ti_raw` field from `type_info`.
For virtual methods, use mangled name of the method from base class in order for dynamic dispatch to work.
Reviewed By: dulmarod
Differential Revision: D3556118
fbshipit-source-id: e45edb5
Summary:
Class names fragile, easy to break and they introduce another level of indirection.
Since C++ translation doesn't need names, pass decl pointers everywhere.
Doing otherwise will most likely result in assert false.
Handling of class names in objc translation is more involving and it's left
for now. Later, objc can use same mechanism as C++.
Reviewed By: dulmarod
Differential Revision: D3570176
fbshipit-source-id: b957aba
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:
Move Sil.call_flags type and operations into separate CallFlags
module.
Reviewed By: dulmarod
Differential Revision: D3548086
fbshipit-source-id: 6d264e9
Summary: Move Sil.binop type and operations into separate Binop module.
Reviewed By: dulmarod
Differential Revision: D3548082
fbshipit-source-id: 356bee3
Summary: Move Sil.unop type and operations into separate Unop module.
Reviewed By: dulmarod
Differential Revision: D3548077
fbshipit-source-id: 49d3d83
Summary: Move Sil.const type and operations into separate Const module.
Reviewed By: dulmarod
Differential Revision: D3548073
fbshipit-source-id: 388d03e
Summary:
Move closure values from const to exp. They are not constants, and
this reduces interdependence between Sil types.
Reviewed By: sblackshear
Differential Revision: D3541364
fbshipit-source-id: 1a2f998
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:
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: lambdaExpr now has more information, make infer compile with that new version
Reviewed By: dulmarod
Differential Revision: D3515291
fbshipit-source-id: d239bd3
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:
1. Fetch newest changes to ast exporter. Now we'll hash template instantiations inside declaration names if their string representation is too long (ie. 40 characters)
2. Increase biniou buffer to allow for long type names - they happen when dumping type raw name with long template instantiation (it's not hashed there yet, but infer doesn't use `ti_raw` field much
Reviewed By: dulmarod
Differential Revision: D3462743
fbshipit-source-id: 9152ae5
Summary: They were reusing same type and it lead to wrong type in cache for one of them
Reviewed By: jvillard
Differential Revision: D3462759
fbshipit-source-id: 8e10678
Summary:
Now that array types record only static - and therefore constant -
lengths, Sil typ and exp no longer need to be mutually recursive.
This diff:
- splits the recursion in the type definitions of typ and exp,
- splits the recursion in the comparison and pretty-printing
functions,
- and then refactors typ into a separate module.
Reviewed By: cristianoc
Differential Revision: D3423575
fbshipit-source-id: 6130630
Summary:
This diff refactors Sil.Int, which represents integer literals, into a
separate module IntLit. There are no dependencies forcing Sil.Int to
be a submodule of Sil, and it is also no simpler as a submodule.
Reviewed By: cristianoc
Differential Revision: D3422910
fbshipit-source-id: 63013f2
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:
This diff extends Sizeof expressions with an optional expression for the
length of the final extensible array, if any. For example, sizeof a
simple array `sizeof(t[n])` is represented by (modulo subtyping info)
`Sizeof t (Some n)`, and sizeof a struct whose final member is an array
`sizeof(struct s {... t[n] f})` is represented by `Sizeof (struct s
{... t[n] f}) (Some n)`.
This is an intermediate step toward eliminating expressions from types,
the redundancy between the length in the types and in the sizeof
expressions will be eliminated later.
Reviewed By: cristianoc
Differential Revision: D3358763
fbshipit-source-id: 2239bca
Dulma Churchill
Ryan Rhee
Jules Villard
Dino Distefano
Andrzej Kotulski
Cristiano Calcagno
Josh Berdine
Sam Blackshear
Martino Luca