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: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
Instead of translating code from headers blindly, translate only gets transitively referenced from source code.
It won't translate functions from system headers, but in the future we could do that as well
since most of them aren't used and it shouldn't add much overhead.
For now this functionality is hidden behind --cxx-experimental flag
Reviewed By: dulmarod
Differential Revision: D3163519
fb-gh-sync-id: 0c53b10
fbshipit-source-id: 0c53b10
Summary:public
Eliminate the use of the -open Utils command line option passed to the compiler in favor of `open! Utils` in each source file. While slightly convenient, this option causes more headaches than it is worth with other tools e.g. merlin.
Reviewed By: jvillard
Differential Revision: D3168193
fb-gh-sync-id: 4285ef6
fbshipit-source-id: 4285ef6
Summary:public
Instead of using location of init_stmt, use location of variable when translating initialization.
Most of the time it change anything with some exceptions:
// example1 - C/C++/objC
int x = // now: assignment happens in this line
3; // past: assignment happens in this line
// example2: valid in C++11 only
struct X {
int x = 0; // now: one assignment here
int y = 2; // now: one assigmnent here
X() = default; // before: 2 assignments in this line
};
Reviewed By: dulmarod
Differential Revision: D3155870
fb-gh-sync-id: f38c78c
fbshipit-source-id: f38c78c
Summary:public
This will allow SymExec to depend on Inferconfig with introducing
circular dependencies, as Inferconfig calls Builtin.is_registered.
Reviewed By: jeremydubreil
Differential Revision: D3100614
fb-gh-sync-id: 786cf62
fbshipit-source-id: 786cf62
Summary:public
This diff refactors the current recursive module. It simplifies the structure
making CMethod_decl redoundand.
The idea is to have now two recursive functors: cTrans.ml and cFrontend.ml.
The first dealing with all the expressions and the latter dealing with all
the declarations (in a later diff, we may want to change names of these moules
to reflect Expr and Decl).
This structure will enable to implement lambdas. The previous version
would require some more complex solution where another recursive module
would be involved.
I'm breaking the refactoring in several diffs to make it easier to review.
Reviewed By: akotulski
Differential Revision: D3035122
fb-gh-sync-id: 7dabe9e
shipit-source-id: 7dabe9e
Summary:public This also required a refactoring of InitListExpr.
The idea is that ImplicitValueInitExpr can stand for initialising a whole struct,
so we translating as a list of zero expressions, according to the struct's fields,
which is then paired with a list of field expressions, such that one get a list of
assignment instructions.
Reviewed By: ddino
Differential Revision: D2999875
fb-gh-sync-id: 7f609a0
shipit-source-id: 7f609a0
Summary:public
Revamped Timeout module by storing elapsed wallclock seconds, and the status of symops, in case of recursive calls.
Extended the API with suspend() and resume() to pause and resume the current timeout.
These are used before and after an on-demand call to the analysis functions.
This achieves the effect that each procedure, even though is interrupted, has its own time and symop counters, which are suspended and resumed as required.
Reviewed By: jeremydubreil
Differential Revision: D2976918
fb-gh-sync-id: 0ed1079
shipit-source-id: 0ed1079
Summary:public
Improved/simplified framework for fronend checkers.
Now we have a unique hook from cTrans to run checkers on statements and a unique
hook from cFrontent to run checkers on declarations.
So now when adding a checker we don't have to modify cTrans/cFrontend.
Moreover made more sistematic the way checkers are invoked. This simplify the definition
of checkers and the way we use them.
Code is now simpler.
Reviewed By: jvillard
Differential Revision: D2976589
fb-gh-sync-id: fbe22d4
shipit-source-id: fbe22d4
Summary:public
Add extra dereference when accessing fields that have T& type. It is similar
to what is done when accessing variables of T& type.
The only difference is that we need to handle constructor initializer list
separately (this is the only place where the field can be initialized)
Reviewed By: ddino
Differential Revision: D2965887
fb-gh-sync-id: 1b8708b
shipit-source-id: 1b8708b
Summary:public
Do same thing we do to CXXDefaultArgExpr
Reviewed By: dulmarod
Differential Revision: D2954128
fb-gh-sync-id: 2c92c16
shipit-source-id: 2c92c16
Summary:public
I have seen enough comments in this space by people during code review to switch on the analyses the compiler can already do. This diff is an automated renaming of unused identifiers to _, with a few additional changes made when reading the diff of the results for things that stood out as particularly strange. This base-lines all of the existing warnings. I'm not sure this is a good idea, since it might be better for those familiar with each part of the code to look at these warnings and use them as pointers to suspicious code.
Reviewed By: jeremydubreil
Differential Revision: D2938376
fb-gh-sync-id: 6e67817
shipit-source-id: 6e67817
Summary:
public
This expression is used to value-initialize non-class types. Per definition of value initialization for non-class types:
1. If it's an array, value-initialize each of its elements
2. Otherwise, zero-initialize it
http://en.cppreference.com/w/cpp/language/value_initialization
I was unable to reproduce (1) in a way that produced CXXScalarValueInitExpr and so this diff
deals with case (2)
Reviewed By: jvillard
Differential Revision: D2901311
fb-gh-sync-id: beeafa2
Summary:
public Add typ information to trans_state.var_exp and use it
in constructor translation.
This information is necessary to call constructor of class Base on object with
different type (which is derived from Base)
Reviewed By: jberdine
Differential Revision: D2890850
fb-gh-sync-id: 8075db1
Summary:
public
Add type of return parameter to the context. It allows for better translation
of returnStmt and will be necessary for easy implementation of constructor init lists
Reviewed By: cristianoc
Differential Revision: D2890838
fb-gh-sync-id: e791c3d
Summary:
public
xvalues is concept introduced in C++11. While they are not same as lvalues, they have one common trait:
They have identity which means that:
> it's possible to determine whether the expression refers to the same entity as another expression, such as by comparing addresses of the objects or the functions they identify (obtained directly or indirectly);
It means that as far as backend is concerned, they should be treated in same way. Right now there is no concept of "move" in the backend and so we don't have
to differentiate between them.
Reference:
http://en.cppreference.com/w/cpp/language/value_category
Reviewed By: cristianoc
Differential Revision: D2895593
fb-gh-sync-id: 5101e28
Summary:
public
Simplify our frontend by using information from clang.
It will also make default argument resolution more robust
with templates
Reviewed By: jvillard
Differential Revision: D2890451
fb-gh-sync-id: 9db4beb
Summary:
public
These casts are responsible for 100 crashes in the frontend on rocksdb.
Reviewed By: dulmarod
Differential Revision: D2879532
fb-gh-sync-id: c4594fb
Summary:
public
1. Add support for temporary C++ objects.
2. Make constructor calls return constructed objects - it allows us pass them as parameters to another constructs (such as parameters, member expressions etc.)
3. Translate FunctionalCastExpr which sometimes is used instead of CXXTemporaryObjectExpr
Reviewed By: dulmarod
Differential Revision: D2874916
fb-gh-sync-id: d9ac2cc
Summary:
public
1. Change exps result of translating call expressions
2. Modify field/method_deref_trans to make them work with rvalues returned by function
3. Add E2E test
Reviewed By: jberdine
Differential Revision: D2874822
fb-gh-sync-id: 42c617d
Summary:
public
This is main reason for not translating rocksdb code right now. Deal with it.
Reviewed By: dulmarod
Differential Revision: D2874446
fb-gh-sync-id: 6f6cf3a
Summary:
public
1. Make function body one stmt instead of list
2. Revert list of statements in exec_trans_instrs
3. Simplify some code related to handling custom instructions
Reviewed By: jvillard
Differential Revision: D2865275
fb-gh-sync-id: b07ed06
Summary:
public
1. When function uses return parameter instead of returning directly, populate that parameter.
2. Turn on new feature for C/C++ functions/methods that return structured types
Reviewed By: jberdine
Differential Revision: D2865091
fb-gh-sync-id: e15e6eb
Summary:
public
When method has return parameter, that parameter has to be added when method is called. This adds support for that feature.
Reviewed By: jberdine
Differential Revision: D2864857
fb-gh-sync-id: f7f4094
Summary:
public
Introduce additional parameter for functions returning struct types - instead of returning it, populate output parameter.
This diff just changes method signature, there are more coming
Reviewed By: jberdine
Differential Revision: D2864842
fb-gh-sync-id: 52fc12c
Summary:
public
Remove some of the explicit pattern matches in favor of using trans_state.var_exp for
init lists and compound literals
Reviewed By: jvillard
Differential Revision: D2855203
fb-gh-sync-id: ce929f6
Summary:
public
Add optional field to trans_state that denotes variable that is being initialized.
This information will be used by certain constructs (such as c++ constructors or
list initialization).
Passing it in trans_state will enable us to deal with more complicated AST structures where
there might be multiple nodes between variable declaration and its initialization.
Reviewed By: jvillard
Differential Revision: D2854988
fb-gh-sync-id: c100380
Summary: public use Sil.exp to pass variable to initialize instead of res_trans containing this Sil.exp.
Reviewed By: jvillard
Differential Revision: D2854981
fb-gh-sync-id: 0cb37f3
Summary:
public
otherwise Infer cannot know the type of the temporary variable
Reviewed By: dulmarod
Differential Revision: D2845054
fb-gh-sync-id: cf5fb8d
Summary:
public
Get newest version of facebook-clang-plugin that replaces pointers from strings to ints.
Fix all compilation issues infer has
Reviewed By: jvillard
Differential Revision: D2815144
fb-gh-sync-id: e93d4b3
Summary:
public
Add destructor calls on delete expression.
While not the most important, it is the simplest case of adding destructor calls.
This will help us in the future with more complex cases.
Reviewed By: ddino
Differential Revision: D2773483
fb-gh-sync-id: 4df9c73
Summary:
public
This diff cleans up the detection of assertion failures in C, C++ and Objective C which was previously hacked on top of the tracing mode for Java. The code is also generalized to detect any custom errors which can be defined using the `__infer_fail` builtin, and the case of assertion failure is now just the specific case of translating `assert` using `__infer_fail` directly in the clang frontend.
Reviewed By: jberdine
Differential Revision: D2786574
fb-gh-sync-id: dd1e1cf
Summary:
public
Move the naming of types to it own module, so that it can be used by modules `Sil` depends from like `Procname`
Reviewed By: jberdine
Differential Revision: D2773148
fb-gh-sync-id: a89f595
Summary:
public
Move the representation of data-structure into it own module, so that it can be used by modules `Sil` depends from like `Procname`.
Reviewed By: jberdine
Differential Revision: D2772791
fb-gh-sync-id: cda4e3a
Summary:
public
Factor resolving default parameters from common method/constructor translation function.
This is done in preparation to use same function for generating destructor calls.
Reviewed By: dulmarod
Differential Revision: D2769291
fb-gh-sync-id: 9c35cf8
Summary:
public
Remove trans_state.parent_line_number because it's not used anymore.
This slightly cleans up codebase
Reviewed By: ddino
Differential Revision: D2755050
fb-gh-sync-id: b1b7e8e
Summary:
public there was a problem with
templated method names that had '/' in its names.
This happened for names like this: `method_name<(anonymous lambda in path/to/src:1:1)>`
Plus random fix to backend logging
Reviewed By: dulmarod
Differential Revision: D2749359
fb-gh-sync-id: b9a0fcd
Summary:
public This continues the work on adding builtins for getters and setters
and removing the generated code from the frontend. This is extending it to setters and
removing the preanalysis that is no longer needed.
Reviewed By: akotulski
Differential Revision: D2734499
fb-gh-sync-id: 7cf5749
Summary:
public
Add support for decl statements inside condition of switch statement
Reviewed By: ddino
Differential Revision: D2734213
fb-gh-sync-id: d60021d
Summary:
public
Change semantics of res_trans_cond inside switchStmt_trans to include
condition node (as opposed to children nodes only).
This way, meaning will be consistent with conditions inside if and while
Reviewed By: ddino
Differential Revision: D2734185
fb-gh-sync-id: 866eee2
Summary:
public
Conditional operator in C++ allows to return lvalues as a result of the operator.
Make infer frontend smart enough to detect when that happens and treat this
case correctly
Reviewed By: ddino
Differential Revision: D2729468
fb-gh-sync-id: f4a110d
Summary:
public Using the new information from the plugin that links method decls in objc with their
properties if they are getters. Setters to be done in next diff.
Reviewed By: ddino
Differential Revision: D2729511
fb-gh-sync-id: dc58894
Summary:
public
Modify do_branch inside conditionalOperator_trans:
1. Remove TempJoinNode optimization - instead create join node as usually. It produces one more node, but it's much cleaner
2. Claim priority inside do_branch instead of appending instructions to node created by children
3. Use compute_results_to_parent to some extent
4. Random changes to loop_instruction and trans_assertion_failure to make tests pass
Reviewed By: ddino
Differential Revision: D2708076
fb-gh-sync-id: d429167
Summary: public These two functions were doing very same things.
After last refactor code of both functions started to look very similar.
Reviewed By: dulmarod
Differential Revision: D2707502
fb-gh-sync-id: b0559a3
Summary: public
We were generating getters and setters in the frontend, and then removing them if they were not needed
in the preanalysis. This diff adds a builtin getter that gets called if we are going to skip the function. That
means, if there was a getter written by the developers we still use that one rather than the builtin.
Code for setter and cleanup of preanalysis will come in a next diff.
Reviewed By: jvillard
Differential Revision: D2702890
fb-gh-sync-id: d65f25e
Summary: public
Use PriorityNode.compute_results_to_parent in BinaryOperator_trans.
There is no functional change intended
Reviewed By: ddino
Differential Revision: D2696382
fb-gh-sync-id: 4e75761
Summary: public
Refactor compute_results_to_parent to call collect_res_trans directly there.
So the job of PriorityNode.compute_results_to_parent is the following:
Given list of [res_trans_1; res_trans_2; ... ; res_trans_n],
1. Connect nodes linearly (ie. res_trans_1 with res_trans_2, res_trans_2 with res_trans_3) etc.
If res_trans_k has no nodes, try connecting res_trans_k-1 with res_trans_k+1 (this is what collect_res_trans always did)
2. Collect all ids, instrs and exps into one res_trans
3. Create node if needed and put there same ids and instrs as usual.
4. Connect new node with existing ones
4. Return new node structrue with exps = []
This will make function usable in more places so we don't have to create nodes over and over again
Reviewed By: ddino
Differential Revision: D2696351
fb-gh-sync-id: 9f4a9b4
Summary: public Make it uniform with other function call translations. This is just reordering, no functional change intended
Reviewed By: dulmarod
Differential Revision: D2696370
fb-gh-sync-id: 63656e3
Summary: public
Nodes in these functions can be created later (after translation of subexpressions is done).
Change triggers many differences in .dot files, but they are all about different numbering of
nodes.
There is no functional change in this diff.
Reviewed By: dulmarod
Differential Revision: D2699703
fb-gh-sync-id: a7b8d2a
Summary: public
In both functions, there is no need to pass anything in succ_nodes since nodes will be connected later anyway.
This will allow to create node later (will be done in separate diff)
Reviewed By: dulmarod
Differential Revision: D2699693
fb-gh-sync-id: 4396d31
Summary: public
Infer gets confused with this cast. It happens when objects try
to access superclass field/method, but we shouldn't change type in
this case (for the sake of backend)
Reviewed By: dulmarod
Differential Revision: D2663905
fb-gh-sync-id: bbf1cb2
Summary: public
Not finding C++ method in decl map was considered impossible to happen.
It turns out it can happen because ast exporter wasn't exporting template
instantiations.
So instead, pick a default when method decl is not found. This will be right in
most cases and will allow us to analyze rest of the function without crashing
frontend
Reviewed By: dulmarod
Differential Revision: D2695653
fb-gh-sync-id: 4077c59
Summary: public
Using clang's method resolution. This means that, in method calls, clang gives you a pointer to the declaration of the method.
In some cases though, clang doesn't find the right method. For example, when it finds a method in a category, we
need to make it into a method in the corresponding class, because that's how we treat categories in Infer. Moreover,
when it finds a method in a protocol, that is not useful for us, since the implementation will be in some class. Finally,
sometimes the call is on an object of type id, in which case clang doesn't know what is the correct declaration. In
those cases, we fall back to what we were doing before of approximating the method resolution. We also refactor
some of the code.
Reviewed By: akotulski
Differential Revision: D2679766
fb-gh-sync-id: b79bb85
Summary: public
Support MaterializeTemporaryExpr which happens often in real life C++.
For example, it will happen in this code:
std::vector<int> v;
v.push_back(1);
// it's because std::vector<int>::push_back(const int &)
Strategy is to create variable that will store value of init expression (to provide storage)
and then return variable as a result of an expression
Reviewed By: ddino
Differential Revision: D2674340
fb-gh-sync-id: 077ed6a
Jules Villard
Cristiano Calcagno
Dulma Rodriguez
Andrzej Kotulski
Josh Berdine
Sam Blackshear
Dino Distefano
jrm