Summary: Mostly refactoring, get rid of some minor TODOs in the process.
Reviewed By: skcho
Differential Revision: D26916013
fbshipit-source-id: 53c34af05
Summary:
This resolves a few instances of false negatives; typically:
```
if (x == y) {
// HERE
*x = 10;
*y = 44;
// THERE
}
```
We used to get
```
HERE: &x->v * &y ->v' * v == v'
THERE: &x->v * &y ->v' * v == v' * v |-> 10 * v' |-> 44
```
The state at THERE was thus inconsistent and detected as such (v` and
`v'` are allocated separately in the heap hence cannot be equal).
Now we normalize the state more eagerly and so we get:
```
HERE: &x->v * &y->v
THERE: &x->v * &y->v * v |-> 44
```
Reviewed By: skcho
Differential Revision: D26488377
fbshipit-source-id: 568e685f0
Summary:
There should be no equalities relevant to the precondition to
canonicalize against in the first place: equalities come either from
assignments (hence strictly to the post condition) or from PRUNE
statements, and we don't use the latter to canonicalize states anyway.
Reviewed By: skcho
Differential Revision: D26488378
fbshipit-source-id: 7923f71ea
Summary:
This is all dead code but I had to do this to try something else and I
don't want to have to do that again :)
Reviewed By: skcho
Differential Revision: D26022111
fbshipit-source-id: 622ca10b9
Summary:
When we know `v1 = v2`, canonicalize `v2 -> v1 * v3 -> v2` to
`v1 -> v1 * v3 -> v1`. Only do this when creating summaries
(and so also when reporting errors) for now.
This only takes into account the equality relation between variables
for now. It needs to be extended to take into account other ways
variables can be equal, eg when two variables are equal to the same
constant or the same term.
Reviewed By: skcho
Differential Revision: D25092158
fbshipit-source-id: 9e589b631
Summary:
Emit the crucial parts of Pulse summaries as json to enable
post-processing by external tools. Stop somewhat arbitrarily at some
datatypes that are just emitted as "opaque" values.
For example:
```
$ infer debug --procedures --procedures-summary-json --select 0
[[["pulse",[["ContinueProgram",{"post":{"heap":[["v3",[[["Dereference"],["v4","_"]]]],["v7",[[["Dereference"],["v3","_"]]]]],"stack":[[["ProgramVar",{"plain":"return","mangled":null}],["v7","_"]]],"attrs":"_"},"pre":{"heap":[],"stack":[],"attrs":"_"},"skipped_calls":"_","path_condition":"_"}],["ContinueProgram",{"post":{"heap":[["v3",[[["Dereference"],["v4","_"]]]],["v8",[[["Dereference"],["v3","_"]]]]],"stack":[[["ProgramVar",{"plain":"return","mangled":null}],["v8","_"]]],"attrs":"_"},"pre":{"heap":[],"stack":[],"attrs":"_"},"skipped_calls":"_","path_condition":"_"}]]]]]
```
Reviewed By: ezgicicek
Differential Revision: D24503387
fbshipit-source-id: 9bd08e93b
Jules Villard