This patch mechanically replaces None with std::nullopt where the
compiler would warn if None were deprecated. The intent is to reduce
the amount of manual work required in migrating from Optional to
std::optional.
This is part of an effort to migrate from llvm::Optional to
std::optional:
https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716
Write tests for the actual crash that was found. Write comments and refactor
code around 17 style bugs and suppress 3 false positives.
Differential Revision: https://reviews.llvm.org/D66847
llvm-svn: 370246
to reflect the new license.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
llvm-svn: 351636
ClangCheckerRegistry is a very non-obvious, poorly documented, weird concept.
It derives from CheckerRegistry, and is placed in lib/StaticAnalyzer/Frontend,
whereas it's base is located in lib/StaticAnalyzer/Core. It was, from what I can
imagine, used to circumvent the problem that the registry functions of the
checkers are located in the clangStaticAnalyzerCheckers library, but that
library depends on clangStaticAnalyzerCore. However, clangStaticAnalyzerFrontend
depends on both of those libraries.
One can make the observation however, that CheckerRegistry has no place in Core,
it isn't used there at all! The only place where it is used is Frontend, which
is where it ultimately belongs.
This move implies that since
include/clang/StaticAnalyzer/Checkers/ClangCheckers.h only contained a single function:
class CheckerRegistry;
void registerBuiltinCheckers(CheckerRegistry ®istry);
it had to re purposed, as CheckerRegistry is no longer available to
clangStaticAnalyzerCheckers. It was renamed to BuiltinCheckerRegistration.h,
which actually describes it a lot better -- it does not contain the registration
functions for checkers, but only those generated by the tblgen files.
Differential Revision: https://reviews.llvm.org/D54436
llvm-svn: 349275
Especially with pointees, a lot of meaningless reports came from uninitialized
regions that were already reported. This is fixed by storing all reported fields
to the GDM.
Differential Revision: https://reviews.llvm.org/D51531
llvm-svn: 347153
I've added a new functionality, the checker is now able to
detect and report fields pointing to themselves. I figured
this would fit well into the checker as there's no reason
for a pointer to point to itself instead of being nullptr.
Differential Revision: https://reviews.llvm.org/D51305
llvm-svn: 344242
Since I plan to add a number of new flags, it made sense to encapsulate
them in a new struct, in order not to pollute FindUninitializedFields's
constructor with new boolean options with super long names.
This revision practically reverts D50508, since FindUninitializedFields
now accesses the pedantic flag anyways.
Differential Revision: https://reviews.llvm.org/D51679
llvm-svn: 342219
Some of the comments are incorrect, imprecise, or simply nonexistent.
Since I have a better grasp on how the analyzer works, it makes sense
to update most of them in a single swoop.
I tried not to flood the code with comments too much, this amount
feels just right to me.
Differential Revision: https://reviews.llvm.org/D51417
llvm-svn: 342215
iThis patch aims to fix derefencing, which has been debated for months now.
Instead of working with SVals, the function now relies on TypedValueRegion.
Differential Revision: https://reviews.llvm.org/D51057
llvm-svn: 342213
Now that it has it's own file, it makes little sense for
isPointerOrReferenceUninit to be this large, so I moved
dereferencing to a separate function.
Differential Revision: https://reviews.llvm.org/D50509
llvm-svn: 340265
Before this patch, FieldChainInfo used a spaghetti: it took care of way too many cases,
even though it was always meant as a lightweight wrapper around
ImmutableList<const FieldRegion *>.
This problem is solved by introducing a lightweight polymorphic wrapper around const
FieldRegion *, FieldNode. It is an interface that abstracts away special cases like
pointers/references, objects that need to be casted to another type for a proper note
messages.
Changes to FieldChainInfo:
* Now wraps ImmutableList<const FieldNode &>.
* Any pointer/reference related fields and methods were removed
* Got a new add method. This replaces it's former constructors as a way to create a
new FieldChainInfo objects with a new element.
Changes to FindUninitializedField:
* In order not to deal with dynamic memory management, when an uninitialized field is
found, the note message for it is constructed and is stored instead of a
FieldChainInfo object. (see doc around addFieldToUninits).
Some of the test files are changed too, from now on uninitialized pointees of references
always print "uninitialized pointee" instead of "uninitialized field" (which should've
really been like this from the beginning).
I also updated every comment according to these changes.
Differential Revision: https://reviews.llvm.org/D50506
llvm-svn: 339599
In this patch, the following classes and functions have been moved to a header file:
FieldChainInfo
FindUninitializedFields
isPrimitiveType
This also meant that they moved from anonymous namespace to clang::ento.
Code related to pointer chasing now relies in its own file.
There's absolutely no functional change in this patch -- its literally just copy pasting.
Differential Revision: https://reviews.llvm.org/D50504
llvm-svn: 339595
Kazu Hirata