Summary: In the pointer arithmetics, it returns top, if we cannot precisely follow the physical memory model, e.g., (&x + 1).
Reviewed By: mbouaziz
Differential Revision: D7453510
fbshipit-source-id: db8738e
Summary: It adds an issue type, `BUFFER_OVERRUN_U5`, for alarms involving unknown values, i.e., when the trace set includes an unknown function call.
Reviewed By: mbouaziz
Differential Revision: D7178841
fbshipit-source-id: bfe857b
Summary: It corrects a precision bug in the interval domain, with adding some test cases.
Reviewed By: mbouaziz
Differential Revision: D7230918
fbshipit-source-id: 3ec641a
Summary:
:
Previously, we did not have information about type of `exp` in `sizeof exp` from clang plugin which led to `Bad_footprint` errors. Infer did not understand `sizeof *p` in `struct Person* p = malloc(sizeof *p);` and used some default type.
This resulted in `Bad_footprint` error when trying to assign to a field `age` in `p->age=42;`.
This diff uses the version of clang plugin which exports the appropriate type information.
update-submodule: facebook-clang-plugins
Reviewed By: dulmarod
Differential Revision: D7179870
fbshipit-source-id: 4104f10
Summary:
Show some `SymAssign`s (corresponding to parameters) in the trace.
Depends on D7194448
Reviewed By: skcho
Differential Revision: D7194479
fbshipit-source-id: 0deff6c
Summary: It corrects a bug that `&(x.f[n])` was evaluated to `&(x.f[0])`.
Reviewed By: mbouaziz
Differential Revision: D7179620
fbshipit-source-id: 04cbaa7
Summary: It avoids that locations of array fields are evaluated to the `unknown` location incorrectly by addressing the case in the `eval_lindex` function.
Reviewed By: mbouaziz
Differential Revision: D7152736
fbshipit-source-id: 2dc825e
Summary: It collects array accesses from all sub expressions in commands.
Reviewed By: mbouaziz
Differential Revision: D7165098
fbshipit-source-id: 584dc80
Summary:
Ran into this issue on Debian Testing, in which assert.h is probably different
due to a more recent toolchain. Without this change I get the following CFG
for `assert(e)`:
```
start
|-> prune (e) -> join
|-> prune (!e) -> __infer_fail("ASSERTION_FAILURE") -> exit
```
Notice that the first branch does not get to the exit, so infer must think that
the assertion is *always* violated, and reports `error: ASSERTION_FAILURE`.
This is broken.
Reviewed By: dulmarod
Differential Revision: D7067822
fbshipit-source-id: a2bf5ac
Summary: The heuristics to determine the end of a block/procedure was too brittle, the new one ignores non significant instructions.
Reviewed By: jvillard
Differential Revision: D6845380
fbshipit-source-id: feab557
Summary: This should allow to report several occurences of the an issue appearing several times within the same method.
Reviewed By: jvillard
Differential Revision: D6783298
fbshipit-source-id: 5555906
Summary:
Not sure what an "iCFG" is but the dotty is only about CFGs anyway.
Diff obtained by mass-`sed`.
Reviewed By: sblackshear
Differential Revision: D6324280
fbshipit-source-id: b7603bb
Summary:
Simpler bug hash that is more independent of the underlying analysis. This now computes the hash based on:
- the bug type.
- the base filename: i.e for my/source/File.java, just keep File.java. So the hash will not change when moving files around.
- the simple method name: i.e. without package information and list of parameters. So changing the list of parameters will not affect the bug hash.
- the error message were the line numbers have been removed. So moving code or reformatting will not affect the hash.
Reviewed By: jberdine
Differential Revision: D6445639
fbshipit-source-id: 82e3cbe
Summary:
It seems that the abstraction instructions were not previously added the the CFG.
This is a functional changes to make sure that the abstraction state is always added. We can simplify the code later and just run this step before storing the CFG instead of after loading them.
Reviewed By: sblackshear, jvillard
Differential Revision: D6383672
fbshipit-source-id: cedcb8a
Summary:
- Plug model checkers
- Add alloc size safety condition on alloc of negative, zero or big size
Reviewed By: sblackshear
Differential Revision: D6375144
fbshipit-source-id: bbea6f3
Summary: This check is deprecated and will be replaced by a dedicated checker to detect unitialized values.
Reviewed By: mbouaziz
Differential Revision: D6133108
fbshipit-source-id: 1c0e9ac
Summary: In preparation for making `-a checkers` the default (when no analyzer is specified), let's test `-a checkers` by default.
Reviewed By: mbouaziz
Differential Revision: D6051177
fbshipit-source-id: d8ef611
Summary:
1. Mark some Makefile targets as depending on `MAKEFILE_LIST` so they get rebuilt on Makefile changes
2. Do not show boolean options with no documentation in the man pages (like we do for other option types).
3. Default to Lazy dynamic dispatch for the checkers.
4. In the tests, use `--<checker>-only` instead of relying on `--no-default-checkers`
5. `--no-filtering` is redundant if `--debug-exceptions` is passed
Reviewed By: jeremydubreil
Differential Revision: D6030578
fbshipit-source-id: 3320f0a
Summary:
Next step to issue deduplication: do not keep safety conditions that are subsumed by others.
Only do it if they do not have infinite bound: replacing `0 < size` by `1 < size` is ok, but replacing it by `+oo < size` is not because it looks much more like a lack of precision.
Reviewed By: skcho
Differential Revision: D5978455
fbshipit-source-id: acc2384
Summary:
Move Inferbo safety conditions to their own file.
Split the old `Condition.t` to a condition together with a trace.
This will ease having: different kind of condition and several traces for the same condition (see following diff)
Reviewed By: jvillard
Differential Revision: D5942030
fbshipit-source-id: d74a612
Summary:
The previous domain for SIOF was duplicating some work with the generic Trace
domain, and basically was a bit confused and confusing. A sink was a set of
global accesses, and a state contains a set of sinks. Then the checker has to
needlessly jump through hoops to normalize this set of sets of accesses into a
set of accesses.
The new domain has one sink = one access, as suggested by sblackshear. This simplifies
a few things, and makes the dedup logic much easier: just grab the first report
of the list of reports for a function.
We only report on the fake procedures generated to initialise a global, and the
filtering means that we keep only one report per global.
Reviewed By: sblackshear
Differential Revision: D5932138
fbshipit-source-id: acb7285
Summary: The prune nodes where translated as `prune (expr = false)` and `prune ( expr != false)`. This case is a bit tricky to deconstruct in HIL. This diff translates the prune instructions as just `prune !expr` for the true branch and `prune expr` for the false branch.
Reviewed By: dulmarod
Differential Revision: D5832147
fbshipit-source-id: 2c3502d
Summary:
Calling exit at the end of a proc does not create unreachable code, prior to this commit inferbo reports that it does.
We extend collect_instrs to detect when we're at the end of a procedure in C and not report on unreachable code if we call a procedure there.
Reviewed By: mbouaziz
Differential Revision: D5623637
fbshipit-source-id: 0d5f326
Summary:
Previous version was hard to understand because it was doing many things within same code. New version has different code for Arrays, Structs and others.
There is some copy-paste, but it's easier to follow code (open to suggestions though)
Reviewed By: dulmarod
Differential Revision: D5547999
fbshipit-source-id: 77ecb24
Summary:
In some cases we normalize expressions to check some facts about them. In these
cases, trying to keep as much information as possible in the expression, such
as the fact it comes from a `sizeof()` expression, is not needed. Doing
destructive normalization allows us to replace `sizeof()` by its
statically-known value.
closes#706
Reviewed By: mbouaziz
Differential Revision: D5536685
fbshipit-source-id: cc3d731
Sungkeun Cho
Ezgi Çiçek
Dino Distefano
Dulma Churchill
Jeremy Dubreil
Daiva Naudziuniene
Mehdi Bouaziz
Jules Villard
Sam Blackshear
Greg Nisbet
Jia Chen
Andrzej Kotulski