Commit Graph

26 Commits

Author SHA1 Message Date
Balazs Benics f1b18a79b7 [analyzer][NFC] Remove dead code and modernize surroundings
Thanks @kazu for helping me clean these parts in D127799.

I'm leaving the dump methods, along with the unused visitor handlers and
the forwarding methods.

The dead parts actually helped to uncover two bugs, to which I'm going
to post separate patches.

Reviewed By: martong

Differential Revision: https://reviews.llvm.org/D127836
2022-06-15 16:50:12 +02:00
Vince Bridgers 5114db933d [analyzer] Clean checker options from bool to DefaultBool (NFC)
A recent review emphasized the preference to use DefaultBool instead of
bool for checker options. This change is a NFC and cleans up some of the
instances where bool was used, and could be changed to DefaultBool.

Reviewed By: steakhal

Differential Revision: https://reviews.llvm.org/D123464
2022-04-23 14:47:29 -05:00
Vince Bridgers 985888411d [analyzer] Refactor makeNull to makeNullWithWidth (NFC)
Usages of makeNull need to be deprecated in favor of makeNullWithWidth
for architectures where the pointer size should not be assumed. This can
occur when pointer sizes can be of different sizes, depending on address
space for example. See https://reviews.llvm.org/D118050 as an example.

This was uncovered initially in a downstream compiler project, and
tested through those systems tests.

steakhal performed systems testing across a large set of open source
projects.

Co-authored-by: steakhal
Resolves: https://github.com/llvm/llvm-project/issues/53664

Reviewed By: NoQ, steakhal

Differential Revision: https://reviews.llvm.org/D119601
2022-03-22 07:35:13 -05:00
Balazs Benics f18da190b0 [analyzer][NFC] Switch to using CallDescription::matches() instead of isCalled()
This patch replaces each use of the previous API with the new one.
In variadic cases, it will use the ADL `matchesAny(Call, CDs...)`
variadic function.
Also simplifies some code involving such operations.

Reviewed By: martong, xazax.hun

Differential Revision: https://reviews.llvm.org/D113591
2021-11-19 18:32:13 +01:00
Balazs Benics 0b9d3a6e53 [analyzer][NFC] Separate CallDescription from CallEvent
`CallDescriptions` deserve its own translation unit.
This patch simply moves the corresponding parts.
Also includes the `CallDescription.h` where it's necessary.

Reviewed By: martong, xazax.hun, Szelethus

Differential Revision: https://reviews.llvm.org/D113587
2021-11-15 19:10:46 +01:00
Kazu Hirata 6a154e606e [clang] Use llvm::is_contained (NFC) 2021-10-15 10:07:08 -07:00
Deep Majumder 80068ca623 [analyzer] Fix for faulty namespace test in SmartPtrModelling
This patch:
- Fixes how the std-namespace test is written in SmartPtrModelling
(now accounts for functions with no Decl available)
- Adds the smart pointer checker flag check where it was missing

Differential Revision: https://reviews.llvm.org/D106296
2021-07-21 18:23:35 +05:30
Deep Majumder d825309352 [analyzer] Handle std::make_unique
Differential Revision: https://reviews.llvm.org/D103750
2021-07-18 19:54:28 +05:30
Deep Majumder 0cd98bef1b [analyzer] Handle std::swap for std::unique_ptr
This patch handles the `std::swap` function specialization
for `std::unique_ptr`. Implemented to be very similar to
how `swap` method is handled

Differential Revision: https://reviews.llvm.org/D104300
2021-07-18 14:38:55 +05:30
Deep Majumder 13fe78212f [analyzer] Handle << operator for std::unique_ptr
This patch handles the `<<` operator defined for `std::unique_ptr` in
    the std namespace (ignores custom overloads of the operator).

    Differential Revision: https://reviews.llvm.org/D105421
2021-07-16 12:34:30 +05:30
Deep Majumder 48688257c5 [analyzer] Model comparision methods of std::unique_ptr
This patch handles all the comparision methods (defined via overloaded
operators) on std::unique_ptr. These operators compare the underlying
pointers, which is modelled by comparing the corresponding inner-pointer
SVal. There is also a special case for comparing the same pointer.

Differential Revision: https://reviews.llvm.org/D104616
2021-07-16 09:54:05 +05:30
Nithin Vadukkumchery Rajendrakumar 0b4fe8086f [Analyzer] Fix for dereferece of smart pointer after branching on unknown inner pointer
Summary: Enabling warning after dereferece of smart pointer after branching on unknown inner pointer.

Reviewers: NoQ, Szelethus, vsavchenko, xazax.hun
Reviewed By: NoQ
Subscribers: martong, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D87043
2020-10-09 13:42:25 +02:00
Hubert Tong d563d7a731 [analyzer][NFC] Add `override` keyword missing from D86027
Speculative fix for `-Werror,-Wsuggest-override` build failures on
the ppc64le-lld-multistage-test bot.
2020-08-31 17:57:22 -04:00
Nithin Vadukkumchery Rajendrakumar bc3d4d9ed7 [analyzer] Add bool operator modeling for unque_ptr
Summary: Implemented boolean conversion operator for unique_ptr

Reviewers: NoQ, Szelethus, vsavchenko, xazax.hun

Reviewed By: NoQ, xazax.hun

Subscribers: martong, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D86027
2020-08-31 19:25:33 +02:00
Nithin Vadukkumchery Rajendrakumar 1b743a9efa [analyzer] Add modeling for unique_ptr move constructor
Summary:
Add support for handling move contructor of std::unique_ptr.

Reviewers: NoQ, Szelethus, vsavchenko, xazax.hun

Reviewed By: NoQ

Subscribers: martong, cfe-commits
Tags: #clang

Differential Revision: https://reviews.llvm.org/D86373
2020-08-31 14:36:11 +02:00
Nithin Vadukkumchery Rajendrakumar 20676cab11 [analyzer] Add modeling of assignment operator in smart ptr
Summary: Support for 'std::unique_ptr>::operator=' in SmartPtrModeling

Reviewers: NoQ, Szelethus, vsavchenko, xazax.hun

Reviewed By: NoQ, vsavchenko, xazax.hun

Subscribers: martong, cfe-commits
Tags: #clang

Differential Revision: https://reviews.llvm.org/D86293
2020-08-26 11:22:55 +02:00
Nithin Vadukkumchery Rajendrakumar 55208f5a21 [analyzer] Add modeling for unque_ptr::get()
Summary: Implemented  modeling for get() method in SmartPtrModeling

Reviewers: NoQ, Szelethus, vsavchenko, xazax.hun

Reviewed By: NoQ, xazax.hun

Subscribers: martong, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D86029
2020-08-23 14:50:26 +02:00
Nithin Vadukkumchery Rajendrakumar 06d100a69a [Analyzer] Support note tags for smart ptr checker
Summary:
Added support for note tags for null smart_ptr reporting

Reviewers: NoQ, Szelethus, vsavchenko, xazax.hun

Reviewed By: NoQ, vsavchenko, xazax.hun

Subscribers: martong, cfe-commits
Tags: #clang

Differential Revision: https://reviews.llvm.org/D84600
2020-08-11 23:27:16 +02:00
Nithin Vadukkumchery Rajendrakumar 76c0577763 [Analyzer] Handle unique_ptr::swap() in SmartPtrModeling
Summary:
    Implemented modeling for unique_ptr::swap() SmartPtrModeling

    Subscribers: xazax.hun, baloghadamsoftware, szepet, a.sidorin, mikhail.ramalho, Szelethus, donat.nagy, dkrupp, Charusso, martong, ASDenysPetrov, cfe-commits

    Reviewers: NoQ, Szelethus, vsavchenko, xazax.hun
    Reviewed By: NoQ, vsavchenko, xazax.hun

    Tags: #clang

    Differential Revision: https://reviews.llvm.org/D8387
2020-07-21 12:05:27 +02:00
Nithin Vadukkumchery Rajendrakumar a560910211 [Analyzer] Add checkRegionChanges for SmartPtrModeling
Summary:
    Implemented checkRegionChanges for SmartPtrModeling

    Reviewers: NoQ, Szelethus, vsavchenko, xazax.hun

    Reviewed By: NoQ, vsavchenko, xazax.hun

    Subscribers: martong, cfe-commits
    Tags: #clang

    Differential Revision: https://reviews.llvm.org/D83836
2020-07-21 01:13:40 +02:00
Benjamin Kramer 724afa5a33 [analyzer] Inline StringSet that's defined in a header
That's just asking for ODR violations. Also drop a call to lower()
that's not needed.
2020-07-13 23:51:05 +02:00
Nithin Vadukkumchery Rajendrakumar 20e271a98d [analyzer] Warning for default constructed unique_ptr dereference
Summary: Add support for warning incase of default constructed unique pointer dereferences

Reviewed By: NoQ, Szelethus, vsavchenko, xazax.hun

Tags: #clang

Differential Revision: https://reviews.llvm.org/D81315
2020-07-08 09:51:02 +02:00
Kirstóf Umann bda3dd0d98 [analyzer][NFC] Change LangOptions to CheckerManager in the shouldRegister* functions
Some checkers may not only depend on language options but also analyzer options.
To make this possible this patch changes the parameter of the shouldRegister*
function to CheckerManager to be able to query the analyzer options when
deciding whether the checker should be registered.

Differential Revision: https://reviews.llvm.org/D75271
2020-03-27 14:34:09 +01:00
Artem Dergachev 44820630df [analyzer] NFC: Change evalCall() to provide a CallEvent.
This changes the checker callback signature to use the modern, easy to
use interface. Additionally, this unblocks future work on allowing
checkers to implement evalCall() for calls that don't correspond to any
call-expression or require additional information that's only available
as part of the CallEvent, such as C++ constructors and destructors.

Differential Revision: https://reviews.llvm.org/D62440

llvm-svn: 363893
2019-06-19 23:33:42 +00:00
Artem Dergachev eb71c0c961 [analyzer] SmartPtrModeling: Fix a null dereference.
Don't crash when trying to model a call in which the callee is unknown
in compile time, eg. a pointer-to-member call.

Differential Revision: https://reviews.llvm.org/D61285

llvm-svn: 359530
2019-04-30 03:00:57 +00:00
Artem Dergachev 8c6119a442 [analyzer] PR41269: Add a bit of C++ smart pointer modeling.
Implement cplusplus.SmartPtrModeling, a new checker that doesn't
emit any warnings but models methods of smart pointers more precisely.

For now the only thing it does is make `(bool) P` return false when `P`
is a freshly moved pointer. This addresses a false positive in the
use-after-move-checker.

Differential Revision: https://reviews.llvm.org/D60796

llvm-svn: 358944
2019-04-23 02:45:42 +00:00