Summary: Turns out we were using it wrong and that's why the lock wasn't working. See https://github.com/ocaml/opam/issues/3694
Reviewed By: ezgicicek
Differential Revision: D13529136
fbshipit-source-id: 66c781e5f
Summary: In the `operator=` case that assigns from a temporary, we want to assign an object of a temporary not it's address (as a comment already says)
Reviewed By: jvillard
Differential Revision: D13518496
fbshipit-source-id: 72bd23623
Summary: Adding a test case for use after destructor for temporaries. At the moment pulse does not find it as frontend does not inject destructors for temporaries.
Reviewed By: jvillard
Differential Revision: D13506229
fbshipit-source-id: 31b9466f7
Summary:
It weakens canonical path in order to avoid an explosion of locations when a struct type has pointers to struct.
For example:
```
struct Tree {
struct Tree *root;
struct Tree *left;
struct Tree *right;
};
```
It was able to generate lots of abstract locations before this diff:
```
t->root
t->left
t->right
t->root->left
t->root->right
t->left->root
t->left->right
t->right->root
t->right->left
t->root->left->right
t->root->right->left
t->left->root->right
t->left->right->root
t->right->root->left
t->right->left->root
```
By this diff, pointer fields that have the same type are (unsoundly) canonicalized to the same one. For example,
```
t->root
t->root->left
t->root->right
t->root->left->right
t->root->right->left
```
are canonicalized to `t->root`. This is definitely unsound but I believe it is better than the location explosion by which analyses do not terminate in a reasonable time or giving a fixed limit of depth to the field access.
Reviewed By: mbouaziz
Differential Revision: D13503808
fbshipit-source-id: 867018712
Summary:
When a C++ temporary goes out of scope, tag its address in the heap with
a new attribute `AddressOfCppTemporary` so that we can later check that
we don't return it.
Reviewed By: da319
Differential Revision: D13466898
fbshipit-source-id: 8808338b4
Summary:
When assign to the special `return` variable, check that the result is
not the address of a local variable, otherwise report.
Reviewed By: ngorogiannis
Differential Revision: D13466896
fbshipit-source-id: 465da7f13
Summary: Naming it `FP_` was a mistake in the original commit that copied the tests over as pulse has never reported on that method.
Reviewed By: da319
Differential Revision: D13465324
fbshipit-source-id: f8b24ebda
Summary:
In order to avoid FPs due to lack of relational info, we apply a heuristic: proof obligations has a latest pruned values,
then it is instantiated at Call statements. If there is a bottom value in the instantiated pruned values, we can say the
program point where the proof obligation is introduced is unreachable with the given parameters of the function.
Depends on D13414441
Reviewed By: mbouaziz
Differential Revision: D13414483
fbshipit-source-id: 61bd34ebb
Summary:
It's ok to take an address of a field / array access of an invalid object.
This diff calculates the inner most dereference for an access expression starting with `&` and does not report on the dereference even if the address is invalid.
Reviewed By: jvillard
Differential Revision: D13450758
fbshipit-source-id: 18c038701
Jules Villard
Mehdi Bouaziz
Nikos Gorogiannis
Jeremy Dubreil
Daiva Naudziuniene
Ezgi Çiçek
Sungkeun Cho
David Lively
Martino Luca