Summary:
For more deduplications of issues, this diff loosens the condition of
similar bounds. The previous condition of similar bounds was too
strict, so [0,0] and [0,+oo] were not similar.
Depends on D10851762
Reviewed By: mbouaziz
Differential Revision: D10866127
fbshipit-source-id: 4ba912a88
Summary:
Sometimes in debug mode, the condition set is too big to print in the
log file. This diff limits the maximum number of conditions to print
as 30.
Reviewed By: mbouaziz
Differential Revision: D12836661
fbshipit-source-id: 8ddfe64a7
Summary:
Seems useful to know when we're printing one instruction only, but not when we
print lots of them for readability.
Reviewed By: mbouaziz
Differential Revision: D12823481
fbshipit-source-id: 2beb339f2
Summary: It tries division on minmax value approximately, rather than just returning infinities. For example, `[0,2+min(6,s)] / 2` returns `[0,4]`.
Reviewed By: mbouaziz
Differential Revision: D10867091
fbshipit-source-id: d3f49987b
Summary:
This diff preserves values of offset and index separately, rather than
one value of their addition, because premature addition results in
imprecise FPs by the limited expressiveness of the domain.
Reviewed By: mbouaziz
Differential Revision: D10851393
fbshipit-source-id: 1685ead36
Summary:
It avoids checking integer overflow when it definitely cannot happen.
For example, it does not check integer overflow of addition when one
of parameters is a negative number, or underflow of subtraction when
its first parameter is a positive number.
Reviewed By: mbouaziz
Differential Revision: D10446161
fbshipit-source-id: b8c86e1b2
Summary: We assume multiplication of 1 is safe. It happens sometimes by multiplying `sizeof(char)`.
Reviewed By: mbouaziz
Differential Revision: D10444680
fbshipit-source-id: 2f33be280
Summary: This diff changes pp of binary operation condition in order to avoid a `make test` failure. For the same `uint64_t` type, it is translated to `unsigned long long` in 64bit mac, but `unsigned long` in 64bit linux, which made a `make test` failure.
Reviewed By: mbouaziz
Differential Revision: D10459466
fbshipit-source-id: 449ab548e
Summary:
It gets built-in integer type widths of C from the clang plugin. For Java, it uses fixed widths.
The controller you requested could not be found.: facebook-clang-plugins
Reviewed By: jvillard
Differential Revision: D10397409
fbshipit-source-id: 73958742e
Summary:
It avoids raising an exception when unexpected arguments are given to
placement new. We will revert this after fixing the frontend to parse
user defined `new` correctly in the future.
Reviewed By: mbouaziz
Differential Revision: D10378136
fbshipit-source-id: d494f781b
Summary: It enables placement_new to get three parameters, which happens when placement_new is overloaded (e.g. Boost).
Reviewed By: mbouaziz
Differential Revision: D10100324
fbshipit-source-id: 0ecb0a404
Summary: It uses big int, instead of 63bits int of OCaml, in the interval domain in order to get preciser numeric values in the future.
Reviewed By: jvillard
Differential Revision: D10123364
fbshipit-source-id: c217f4366
Summary:
First version of differential for costs, based on polynomial's degree's variation. The rule is very simple:
For a given polynomial that is available before and after a diff, `if degree_before > degree_after`, then the issue becomes `fixed`. Instead, `if degree_before < degree_after`, then the issue becomes `introduced`.
Reviewed By: ezgicicek
Differential Revision: D9810150
fbshipit-source-id: d08285926
Summary:
Callsites of `Reporting.log_error/warning` always use `Exceptions.Checkers`, let's simplify the API.
Under the hood it still creates an exception, but this can be cleaned up later.
Reviewed By: jeremydubreil
Differential Revision: D9799860
fbshipit-source-id: 6492a60b4
Summary:
It detaches the Summary module from BufferOverrunDomain.
Depends on D9194130
Reviewed By: jvillard
Differential Revision: D9194375
fbshipit-source-id: 30392b5ce
Summary: It simplifies instantiataion of `ret_alias`. While it got `ret_alias` values by iterating caller's and callee's memory, now it gets `ret_alias` by evaluating symbol paths included in location values.
Reviewed By: mbouaziz
Differential Revision: D9569606
fbshipit-source-id: a3326bb81
Summary:
It simplifies abstract memory instantiations of function calls. Now it instantiates callee memories by directly evaluating symbol paths, rather than constructing `subst_map`.
main changes are:
- no construction of `subst_map` and `trace_map`
- no symbol table in Inferbo's summary
- no `Symbol_not_found` exception (for when a required symbol was unavailable in `subst_map`)
Reviewed By: mbouaziz
Differential Revision: D9495597
fbshipit-source-id: 18cdcd6f7
Summary:
- Was not used by the caller
- Gives smaller summaries
- Will allow adding a intra-proc info, e.g. `node` for reporting (not sure yet)
Reviewed By: skcho
Differential Revision: D9373763
fbshipit-source-id: 322001b53
Summary:
In SIL, (1) some program variables (e.g., array parameter) are used as pointers to heap addresses and (2) the other program variables (e.g., local array) are used as addresses themselves. So, the values of (1) are retrieved by the `Load` command, while that of (2) are by `Exp.Lvar` expressions directly.
To address them differently, we had managed two maps (`Mem.Stack` and `Mem.Heap`), but which introduced function duplications on abstract memory and increased complexity. This diff merges the two maps, and instead a location set is used for distinguishing two types of abstract locations during analysis.
Reviewed By: mbouaziz
Differential Revision: D9420388
fbshipit-source-id: 13f824850
Summary:
It returns unknown values on non-const function calls like on unknown
function calls.
Reviewed By: mbouaziz
Differential Revision: D9478862
fbshipit-source-id: 4b795ec55
Summary: It moves the functions that constructs array values from BufferOverrunSemantics to ArrayBlk and Val modules.
Reviewed By: mbouaziz
Differential Revision: D9194130
fbshipit-source-id: bf040a01a
Summary:
It removes the sizeof function because most of the cases on static types are addressed in the clang frontend.
Depends on D9193802
Reviewed By: mbouaziz
Differential Revision: D9213876
fbshipit-source-id: 0ce2f3749
Summary: It uses a SymbolPath map to Symbol in Inferbo's summary instead of an entry memory of callee, which is used for instantiations of the abstract memories on function calls.
Reviewed By: mbouaziz
Differential Revision: D9081631
fbshipit-source-id: 478cda0de
Summary:
It adds relational domains to Inferbo: octagon of Apron and polyhedra of Elina.
- Each Mem domain value includes one relational value containing relations among symbols. The relational values are modified by the `Prune` and `Store` commands.
- Each abstract value includes three symbols, which represent integer value, array offset, and array size of an abstract value.
The relational domain is deactivated by default. Use the `--bo-relational-domain {oct, poly}` option for the activation, though Inferbo with the relational domains does not work at this point because some modifications of Apron and Elina we made has not been applied to their opam repositories yet.
Reviewed By: jvillard
Differential Revision: D8874102
fbshipit-source-id: 08e5883cb
Mehdi Bouaziz
Sungkeun Cho
Martino Luca
Jules Villard
Ezgi Çiçek
Julian Sutherland
Josh Berdine