Summary:
- Rename `invariantModels` to `purityModels`
- Track which arguments are modified in purity models. Before we were invalidating all arguments of impure modeled functions. Instead, now we only invalidate modified args given in the model. This should ideally result in more precision in the analysis.
- Add some more purity models for :`cast`, `new`, `new_array` and `Math.random`
Reviewed By: mbouaziz
Differential Revision: D15535332
fbshipit-source-id: 5395800d9
Summary:
That test wasn't hooked up to `make test` and so regressed at some
unknown time in the past. Just recording the new state of things for
now.
Reviewed By: ngorogiannis
Differential Revision: D15495234
fbshipit-source-id: 14fb112de
Summary:
Infer was complaining about a parameter not null checked, which was failing the
model compilation since no errors are allowed on models.
Reviewed By: ezgicicek
Differential Revision: D15453573
fbshipit-source-id: 3bd0df715
Summary:
`infer_events` table is a key-value storage that also have list of fields common for entire infer run.
Infer should be agnostic of many of such fields (e.g. diff number).
Hence we will pass such extra fields through CI.
Note that only "normals" (strings in scuba terminology) are currently supported.
Reason being: most of things that are technically ints (like IDs) should actually be normals (because average etc does not make sense for them; and group by, in contrast, does).
Reviewed By: jvillard
Differential Revision: D15376636
fbshipit-source-id: 729eaabfc
Summary: There can be A LOT of procedures -- currently we log two lines (started/done) for each one, when doing call graph scheduling. This leads to ridiculously long log files. Switch to only log these messages in the log file and only if we are verbose logging.
Reviewed By: jvillard
Differential Revision: D15413330
fbshipit-source-id: 6e26693e8
Summary:
Thanks to the newly added `StarField`, path length is better controlled before ondemand is used.
Hence there is no need to (unsoundly) canonicalize paths then anymore.
Reviewed By: ezgicicek
Differential Revision: D15409716
fbshipit-source-id: 9ea7b4717
Summary:
This messes with the deduplication heuristic when templated function
names show up in the error messages, since the heuristic demands that
the error messages are the same.
Reviewed By: mbouaziz
Differential Revision: D15374333
fbshipit-source-id: 70232d254
Summary:
Improve the error messages, change is more or less documented in the
code.
Reviewed By: mbouaziz
Differential Revision: D15374334
fbshipit-source-id: f1dd54180
Summary:
Some edge case involving casting field pointers to the structure type itself generated arbitrarily long paths when used in a loop.
Without changing the widening, this diff avoids repetitions of fields in paths by abstracting them with a star.
E.g. `x.a.b.c.b` will become `x.a.b.c*.b`, and so will `x.a.b.c.a.b`, `x.a.b.c.c.b`, or `x.a.b.c.b.b`.
Reviewed By: ngorogiannis
Differential Revision: D15352143
fbshipit-source-id: 5ea426c5e
Summary:
I was wondering what were the empty sessions and why inferbo was running twice.
Answer: the empty sessions were 'compute pre' and the second run of inferbo was the narrowing phase.
Reviewed By: ngorogiannis
Differential Revision: D15378138
fbshipit-source-id: 507a3df42
Summary:
This was hardcoded to `true` and its purpose is unclear to me. I kill
what confuses me.
Reviewed By: jeremydubreil
Differential Revision: D15294783
fbshipit-source-id: 3c1c469ee
Summary:
- Makes sure that `start_session` and `finish_session` are well parenthesized
- Avoids a try finally when debug is disabled
Reviewed By: ngorogiannis
Differential Revision: D15371841
fbshipit-source-id: 340203edb
Summary:
Before: the trace would explain how a value was invalidated and
accessed, but not how the value that was invalidated had been
constructed.
Now: `PulseTrace.t` records breadcrumbs of how the value was constructed
in addition to the interproc "action" trace leading to the invalidation
or access action.
Concretely:
```
void bad(X &x) {
X *y = x;
X *z = x;
delete y;
access(z);
}
```
will produce the trace:
Invalidation part:
y = x
delete y
Access part:
z = x
access(z)
access to z->f inside of access(z)
Before this diff the "Access part" would be missing the "z = x" part of
the trace, so it might be confusing why `z` has anything to do with `y`.
However, such "breadcrumbs" are not recorded in the inter-procedural
part, only the sequence of calls is. This is a trade-off for simplicity,
maybe it's enough for developers maybe it isn't, we'll find out later.
Reviewed By: jberdine
Differential Revision: D15354438
fbshipit-source-id: 8d0aed717
Summary:
In preparation for the next diff that re-uses `PulseTrace.t` for a type
that combines breadcrumbs + action.
No change intended.
Reviewed By: mbouaziz, jberdine
Differential Revision: D15354437
fbshipit-source-id: cbb8757b4
Summary:
Before: no links to procedure summary and nodes in header file debug html
Now: some or all of them if you are lucky enough
Reviewed By: jvillard
Differential Revision: D15279379
fbshipit-source-id: a145f9e66
Summary:
Before: they are written only when the file is fully analyzed.
Now: a first version is written as soon as the file gets analyzed so that we get links to nodes, the final version overwrites it
Reviewed By: jvillard
Differential Revision: D15279351
fbshipit-source-id: a3120aa31
Ezgi Çiçek
Nikos Gorogiannis
Radu Grigore
Jules Villard
Dino Distefano
Jeremy Dubreil
Mitya Lyubarskiy
Mehdi Bouaziz
Andrew Adams-Moran
David Lively