Summary: Atoms of the form `identifier = footprint var` naturally occurs with the angelic analysis mode. So it is not clear to me why we should drop those.
Reviewed By: sblackshear
Differential Revision: D5654754
fbshipit-source-id: 9dd2eb5
Summary:
- failwith police: no more `failwith`. Instead, use `Logging.die`.
- Introduce the `SimpleLogging` module for dying from modules where `Logging`
cannot be used (usually because that would create a cyclic dependency).
- always log backtraces, and show backtraces on the console except for usage errors
- Also point out in the log file where the toplevel executions of infer happen
Reviewed By: jeremydubreil
Differential Revision: D5726362
fbshipit-source-id: d7a01fc
Summary: This makes the traces more readable when involving skipped functions.
Reviewed By: sblackshear
Differential Revision: D5731683
fbshipit-source-id: 49d363b
Summary: This new tests outlines that Infer does not detect inter-target issues involving native methods.
Reviewed By: sblackshear
Differential Revision: D5720873
fbshipit-source-id: cce8193
Summary: This should not affect the analysis results so there is no need to raise an exception here. We can always add this unsigned shift operator to SIL if we want the analysis to take them into account
Reviewed By: sblackshear
Differential Revision: D5703792
fbshipit-source-id: 739891f
Summary:
This approach was requiring the `InferArray` class to always be part of the classpath, and the only benefit was to preserve the length of the arrays, when known, on calls to `clone()` method. However, adding it to the models would create circular dependencies between the models, the builtins and the tests.
The code is now simpler and we can more aggressively fail when classes that are supposed to be found from the classpath are not found.
Reviewed By: sblackshear
Differential Revision: D5703173
fbshipit-source-id: 3e6cea5
Summary:
I'm working on parameterizing access trees with a config that will limit max depth + perhaps width if needed.
This is a stepping stone to enforcing max depth.
Reviewed By: jvillard
Differential Revision: D5693453
fbshipit-source-id: c15b0ee
Summary:
Rather than printing the footprint using its actual representation (an access trie with bool nodes), print it as a set of access paths.
This makes it easier to read sources in Quandary specs/debug Quandary.
Reviewed By: jeremydubreil
Differential Revision: D5682630
fbshipit-source-id: ac55b7f
Summary:
Add `is_empty` to `AbstractDomain.WithBottom` sig and use the empty checks for nicer printing of access trees: don't print empty nodes/traces.
This should make it easier to debug Quandary; it's pretty hard to stare at an access tree and see what's going on right now.
Reviewed By: jberdine
Differential Revision: D5682248
fbshipit-source-id: 56d2a9d
Summary:
This gets rid of the horrible hack of asking jbuilder to build
_build/{default,test}/.ppx/ppx_compare/ppx.exe prior to starting several
jbuilds in parallel. We now refrain from starting several jbuilds in parallel.
Also, I finally understood that order-only deps do nothing for phony targets,
and not much else for non-phony ones. I hate make even more.
Reviewed By: jberdine
Differential Revision: D5678699
fbshipit-source-id: 52179e8
Summary:
This simplifies the jbuild files: no need to list these files explicitly
anymore, nor to exclude them explicitly from the main `InferModules` library
(due to their different compilation flags).
Isolate common parts into jbuild.common do `cat`-based code inclusion into
jbuild files to factorize code.
Reviewed By: jberdine
Differential Revision: D5678328
fbshipit-source-id: 6d7d925
Summary: In case of syntax errors in AL files, stdout will contain a JSON list with all files affected by the errors, including info like filename and line number.
Reviewed By: dulmarod, jvillard
Differential Revision: D5640272
fbshipit-source-id: 569b16d
Summary:
A function can both be a sink and propagate source info, but we currently ignore the summary for any function that is also a sink.
This will cause us to under-report for (e.g.) `src1 = source(); src2 = strcpy(dest, src1); exec(src2)`.
This is both a potential buffer overflow and a potential shell injection, but we won't report the second issue.
Reviewed By: jberdine
Differential Revision: D5676167
fbshipit-source-id: 232ab2f
Summary:
We now represent the footprint with an access trie, so this code is no longer required.
This lets us simplify things a bit
Reviewed By: jberdine
Differential Revision: D5664484
fbshipit-source-id: c35edf2
Summary:
In looking at summaries that Quandary took a long time to compute, one thing I notice frequently is redundancy in the footprint sources (e.g., I might see `Footprint(x), Footprint(x.f), Footprint(x*)`).
`sudo perf top` indicates that joining big sets of sources is a major performance bottleneck, and a large number of footprint sources is surely a big part of this (since we expect the number of non-footprint sources to be small).
This diff addresses the redundancy issue by using a more complex representation for a set of sources. The "known" sources are still in a set, but the footprint sources are now represented as a set of access paths (via an access trie).
The access path trie is a minimal representation of a set of access paths, so it would represent the example above as a simple `x*`.
This should make join/widen/<= faster and improve performance
Reviewed By: jberdine
Differential Revision: D5663980
fbshipit-source-id: 9fb66f8
Summary:
The previous widening operator added stars to the *end* of paths that existed in `next` but not `prev`. This is not enough to ensure termination in the case where the trie is growing both deeper and wider at the same time.
The newly added test demonstrates this issue. In the code, there's an ever-growing path of the form `tmp.prev.next.prev.next...` that wasn't summarized by the previous widening operator. The new widening is much more aggressive: it replaces *any* node present in `next` but not `prev` with a `*` (rather than trying to tack a star onto the end). This fixes the issue.
This issue was causing divergence on tricky doubly-linked list code in prod.
Reviewed By: jeremydubreil
Differential Revision: D5665719
fbshipit-source-id: 1310a92
Summary:
Saw these two types of errors before (but they're hard to reproduce locally) when building the models:
- `ERROR: Zip.Error("/mnt/btrfs/trunk-git-infer-739-1503054473/infer/bin/../lib/java/models.jar", "", "end of central directory not found, not a ZIP file")`. I think this means infer reads a partially-written models jar. We shouldn't try to load this in models mode.
- `install` would complain that the destination already exists. I think this can only happen if there's a race and the file gets created between when install first checks and when it tries to write to it.
This made me realise that the some of the models are computed in C and C++ mode
and we pick one computed spec arbitrarily. That sounds a bit dodgy but at least
now we do so in a non-racy way.
Reviewed By: jeremydubreil
Differential Revision: D5658389
fbshipit-source-id: 8077279
Summary: Also, stop trying to delete directories that do not exist: "sources" and "filelists".
Reviewed By: mbouaziz
Differential Revision: D5658089
fbshipit-source-id: e1cdb13
Summary:
This is a check for when an unavailable class is being allocated.
This diff also adds a check for the context to remove false positives: If the class is not available but the method calls are wrapped in a check whether the class is available, then don't report.
Reviewed By: jvillard
Differential Revision: D5631191
fbshipit-source-id: 2082dfe
Summary: Other parts of the code where using the checks in the AndroidFramework module. It is better to have those things in one place.
Reviewed By: sblackshear
Differential Revision: D5654247
fbshipit-source-id: 2a783e7
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
Jeremy Dubreil
Jules Villard
Daiva Naudziuniene
Sam Blackshear
Dulma Churchill
Roy Li
Martino Luca
Greg Nisbet