Commit Graph

7565 Commits

Author SHA1 Message Date
Sam McCall e1600db19d [AST] Add UsingType: a sugar type for types found via UsingDecl
Currently there's no way to find the UsingDecl that a typeloc found its
underlying type through. Compare to DeclRefExpr::getFoundDecl().

Design decisions:
- a sugar type, as there are many contexts this type of use may appear in
- UsingType is a leaf like TypedefType, the underlying type has no TypeLoc
- not unified with UnresolvedUsingType: a single name is appealing,
  but being sometimes-sugar is often fiddly.
- not unified with TypedefType: the UsingShadowDecl is not a TypedefNameDecl or
  even a TypeDecl, and users think of these differently.
- does not cover other rarer aliases like objc @compatibility_alias,
  in order to be have a concrete API that's easy to understand.
- implicitly desugared by the hasDeclaration ASTMatcher, to avoid
  breaking existing patterns and following the precedent of ElaboratedType.

Scope:
- This does not cover types associated with template names introduced by
  using declarations. A future patch should introduce a sugar TemplateName
  variant for this. (CTAD deduced types fall under this)
- There are enough AST matchers to fix the in-tree clang-tidy tests and
  probably any other matchers, though more may be useful later.

Caveats:
- This changes a fairly common pattern in the AST people may depend on matching.
  Previously, typeLoc(loc(recordType())) matched whether a struct was
  referred to by its original scope or introduced via using-decl.
  Now, the using-decl case is not matched, and needs a separate matcher.
  This is similar to the case of typedefs but nevertheless both adds
  complexity and breaks existing code.

Differential Revision: https://reviews.llvm.org/D114251
2021-12-20 17:15:38 +01:00
Danila Kutenin cff192739b [clang-include-fixer] Fix incorrect ranking because of dangling references
SymbolAndSignals stores SymbolInfo which stores two std::strings. Then
the values are stored in a llvm::DenseMap<llvm::StringRef, double>. When
the sorting is happening, SymbolAndSignals are swapped and thus because
of small string optimization some strings may become invalid. This
results in incorrect ranking.

This was detected when running new std::sort algorithm against llvm
toolchain. This could have been prevented with running llvm::sort and
EXPENSIVE_CHECKS. Unfortunately, no sanitizer yelled.

I don't have commit rights, kutdanila@yandex.ru Danila Kutenin

Reviewed By: bkramer

Differential Revision: https://reviews.llvm.org/D116037
2021-12-20 15:56:57 +01:00
Aleksandr Platonov 555eacf75f [clangd] Fix undefined behavior when generating error message at rename with an invalid name
`Message()` lambda uses `Reason.Details` as an input parameter for `llvm::formatv()`, but `Reason` in `Message()` is a local object.
Return value of `llvm::formatv()` contains references to its input arguments, thus `Message()` returns an object which contains a reference to `Details` field of the local object `Reason`.
This patch fixes this behavior by passing `Reason` as a reference to `Message()` to ensure that return value of `Message()` contains references to alive object and also prevents copying of `InvalidName` structure at passing it to `makeError()`.

Provided test passes on Linux+GCC with or without this patch, but fails on Windows+VisualStudio without this patch.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D115959
2021-12-19 22:28:26 +03:00
Paul Altin 9198d04c06 Allow disabling integer to floating-point narrowing conversions for cppcoreguidelines-narrowing-conversions
This change adds an option to disable warnings from the
cppcoreguidelines-narrowing-conversions check on integer to floating-
point conversions which may be narrowing.

An example of a case where this might be useful:
```
std::vector<double> v = {1, 2, 3, 4};
double mean = std::accumulate(v.cbegin(), v.cend(), 0.0) / v.size();
```
The conversion from std::size_t to double is technically narrowing on
64-bit systems, but v almost certainly does not have enough elements
for this to be a problem.

This option would allow the cppcoreguidelines-narrowing-conversions
check to be enabled on codebases which might otherwise turn it off
because of cases like the above.
2021-12-16 08:24:09 -05:00
Markus Böck b7d55771ce [clang-tidy][#51939] Exempt placement-new expressions from 'bugprone-throw-keyword-missing'
The purpose of this checker is to flag a missing throw keyword, and does so by checking for the construction of an exception class that is then unused.
This works great except that placement new expressions are also flagged as those lead to the construction of an object as well, even though they are not temporary (as that is dependent on the storage).
This patch fixes the issue by exempting the match if it is within a placement-new.

Fixes https://github.com/llvm/llvm-project/issues/51939

Differential Revision: https://reviews.llvm.org/D115576
2021-12-15 16:59:14 +01:00
Kadir Cetinkaya 517f1d9e5c
[clangd] Add ) to signature-help triggers
It is important for nested function calls.

Differential Revision: https://reviews.llvm.org/D115799
2021-12-15 14:56:27 +01:00
Haojian Wu b7d2d14747 [clangd] Disable the NOLINTBBEGIN testcase in clangd.
NOLINTBEGIN is disabled, in 529833377c
2021-12-15 11:32:27 +01:00
Sam McCall 529833377c [clangd] Disable support for clang-tidy suppression blocks (NOLINTBEGIN)
The implementation is very inefficient and we pay the cost even when the feature is not used

Differential Revision: https://reviews.llvm.org/D115650
2021-12-15 10:58:30 +01:00
Sam McCall 6917f87b3c [clangd] Cleanup unneeded use of shared_ptr. NFC 2021-12-15 02:13:50 +01:00
Stephan T. Lavavej 8bd106a891 [NFC] Fix typos in release notes.
Reviewed By: ldionne, Mordante, MaskRay

Differential Revision: https://reviews.llvm.org/D115685
2021-12-14 14:19:42 -08:00
Kadir Cetinkaya a47af1ac34
[clangd][Dex] Fix crashes when building trigrams for empty identifier 2021-12-13 15:58:33 +01:00
Sam McCall ac431fc2cd [clangd] ... and mark a new test as -fno-ms-compatibility too 2021-12-11 02:41:39 +01:00
Sam McCall 1a68c14b57 [clangd] Restore -fno-ms-compatibility to tests
Turns out these weren't obsolete after all...
http://45.33.8.238/win/50653/step_9.txt
2021-12-11 02:31:26 +01:00
Sam McCall c25ea488a3 [clangd] Include-fixer: handle more "incomplete type" diags.
I started adding tests for all diags but found there were just too many cases.

Differential Revision: https://reviews.llvm.org/D115484
2021-12-11 01:46:35 +01:00
Sam McCall a8bf389f41 [clangd] Clean up some include-fixer tests. NFC 2021-12-11 01:31:03 +01:00
Kadir Cetinkaya d3606a3375
[clangd] Provide documentation as MarkupContent in signaturehelp
This unifies the behaviour we have in code completion item
documentations and signaturehelp. Providing better line wrapping and detection
of inline code blocks in comments to be renedered appropriately in markdown.

Differential Revision: https://reviews.llvm.org/D115442
2021-12-10 12:58:08 +01:00
CJ Johnson a1968d5341 Prevent abseil-cleanup-ctad check from stomping on surrounding context
This change applies two fixes to the abseil-cleanup-ctad check. It uses hasSingleDecl() to ensure only declStmt()s with one varDecl() are matched (leaving compount declStmt()s unchanged). It also addresses a bug in the handling of comments that surround the absl::MakeCleanup() calls by switching to the callArgs() combinator from Clang Transformer.

Reviewed By: ymandel

Differential Revision: https://reviews.llvm.org/D115452
2021-12-09 17:41:12 +00:00
lh123 53219009aa [clang][clangd] Desugar array type.
Desugar array type.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D115107
2021-12-09 20:12:48 +08:00
Adrian Vogelsgesang 5d3b8956e8 Don't offer partial fix-its for `modernize-pass-by-value`
This commit improves the fix-its of modernize-pass-by-value by
no longer proposing partial fixes. In the presence of using/typedef,
we failed to rewrite the function signature but still adjusted the
function body. This led to incorrect, partial fix-its. Instead, the
check now simply doesn't offer any fixes at all in such a situation.
2021-12-08 13:31:30 -05:00
Kirill Bobyrev b673bc36ea [clangd] Suppress IncludeCleaner warnings for headers behind pragma keep
D114072 allows filtering out the warnings for headers behind `// IWYU pragma:
keep`. This is the first step towards more useful IWYU pragmas support and
fine-grained control over the IncludeCleaner warnings.

Reviewed By: kadircet

Differential Revision: https://reviews.llvm.org/D115345
2021-12-08 18:07:40 +01:00
Sam McCall 2676759bf2 [clangd] Add fixes for clang "include <foo.h>" diagnostics
Clang doesn't offer these fixes I guess for a couple of reasons:
 - where to insert includes is a formatting concern, and clang shouldn't
   depend on clang-format
 - the way clang prints diagnostics, we'd show a bunch of basically irrelevant
   context of "this is where we'd want to insert the include"

Maybe it's possible to hack around 1, but 2 is still a concern.
Meanwhile, bolting this onto include-fixer gets the job done.

Fixes https://github.com/clangd/clangd/issues/355
Fixes https://github.com/clangd/clangd/issues/937

Differential Revision: https://reviews.llvm.org/D114667
2021-12-08 16:16:53 +01:00
Kirill Bobyrev eecfc73ae4
[clangd] Record IWYU pragma keep in the IncludeStructure
This will allow the IncludeCleaner to suppress warnings on the lines with "IWYU
pragma: keep".

Clang APIs are not very convinient, so the code has to navigate around it.

Reviewed By: kadircet

Differential Revision: https://reviews.llvm.org/D114072
2021-12-08 15:55:50 +01:00
lh123 6fe577b1c1 [clangd] Make a.k.a printing configurable.
Currently, a.k.a printing is closed by default.

Reviewed By: sammccall, kadircet

Differential Revision: https://reviews.llvm.org/D114665
2021-12-08 14:17:01 +08:00
lh123 ec64d10340 [clangd] Add desugared type to hover
Add desugared type to hover when the desugared type and the pretty-printed type are different.

```c++
template<typename T>
struct TestHover {
  using Type = T;
};

int main() {
  TestHover<int>::Type a;
}
```

```
variable a

Type: TestHover<int>::Type (aka int)
```

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D114522
2021-12-08 13:28:12 +08:00
lh123 51dc466642 [clangd] Print type for VarTemplateDecl in hover.
Print type for VarTemplateDecl in hover.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D115108
2021-12-08 01:20:14 +08:00
Kirill Bobyrev 976a74d7d2 [clangd] Dex Trigrams: Improve query trigram generation
These are the trigrams for queries right now:

- "va" -> {Trigram("va")}
- "va_" -> {} (empty)

This is suboptimal since the resulting query will discard the query information
and return all symbols, some of which will be later be scored expensively
(fuzzy matching score). This is related to
https://github.com/clangd/clangd/issues/39 but does not fix it. Accidentally,
because of that incorrect behavior, when user types "tok::va" there are no
results (the issue is that `tok::kw___builtin_va_arg` does not have "va" token)
but when "tok::va_" is typed, expected result (`tok::kw___builtin_va_arg`)
shows up by accident. This is because the dex query transformer will only
lookup symbols within the `tok::` namespace. There won't be many, so the
returned results will contain symbol we need; this symbol will be filtered out
by the expensive checks and that will be displayed in the editor.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D113995
2021-12-07 15:46:13 +01:00
Aaron Ballman 6c75ab5f66 Introduce _BitInt, deprecate _ExtInt
WG14 adopted the _ExtInt feature from Clang for C23, but renamed the
type to be _BitInt. This patch does the vast majority of the work to
rename _ExtInt to _BitInt, which accounts for most of its size. The new
type is exposed in older C modes and all C++ modes as a conforming
extension. However, there are functional changes worth calling out:

* Deprecates _ExtInt with a fix-it to help users migrate to _BitInt.
* Updates the mangling for the type.
* Updates the documentation and adds a release note to warn users what
is going on.
* Adds new diagnostics for use of _BitInt to call out when it's used as
a Clang extension or as a pre-C23 compatibility concern.
* Adds new tests for the new diagnostic behaviors.

I want to call out the ABI break specifically. We do not believe that
this break will cause a significant imposition for early adopters of
the feature, and so this is being done as a full break. If it turns out
there are critical uses where recompilation is not an option for some
reason, we can consider using ABI tags to ease the transition.
2021-12-06 12:52:01 -05:00
Carlos Galvez 946eb7a037 [clang-tidy][NFC] Move CachedGlobList to GlobList.h
Currently it's hidden inside ClangTidyDiagnosticConsumer,
so it's hard to know it exists.

Given that there are multiple uses of globs in clang-tidy,
it makes sense to have these classes publicly available
for other use cases that might benefit from it.

Also, add unit test by converting the existing tests
for GlobList into typed tests.

Reviewed By: salman-javed-nz

Differential Revision: https://reviews.llvm.org/D113422
2021-12-04 08:50:49 +00:00
Balázs Kéri 1cefe91d40 [clang-tidy][docs][NFC] Improve documentation of bugprone-unhandled-exception-at-new
Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D114602
2021-12-03 16:53:08 +01:00
Kirill Bobyrev bab7a30ab6 [clangd] IncludeCleaner: Do not require forward declarations of RecordDecls when definition is available
This makes IncludeCleaner more useful in the presense of a large number of
forward declarations. If the definition is already in the Translation Unit and
visible to the Main File, forward declarations have no effect.

The original patch D112707 was split in two: D114864 and this one.

Reviewed By: kadircet

Differential Revision: https://reviews.llvm.org/D114949
2021-12-03 09:36:50 +01:00
lh123 7bb785cc33 [clangd] Show parameters for construct.
Show parameters for construct.

Reviewed By: kadircet

Differential Revision: https://reviews.llvm.org/D114621
2021-12-03 13:20:41 +08:00
Vy Nguyen aba8f320cc [clang-tidy][objc] Finds and fixes improper usages of XCTAssertEquals and XCTAssertNotEquals.
Using XCTAssertEqual on NSString* objects is almost always  wrong.

Unfortunately, we have seen a lot of tests doing this and reyling on pointer equality for strings with the same values (which happens to work sometimes - depending on the linker, but this assumption is not guaranteed by the language)

These fixes would make tests less brittle.

Differential Revision: https://reviews.llvm.org/D114975
2021-12-02 18:32:16 -05:00
Yitzhak Mandelbaum 081074e1ea [clang-tidy] Allow disabling support for NOLINTBEGIN/NOLINTEND blocks.
This patch parameterizes the clang-tidy diagnostic consumer with a boolean that
controls whether to honor NOLINTBEGIN/NOLINTEND blocks. The current support for
scanning these blocks is very costly -- O(n*m) in the size of files (n) and
number of diagnostics found (m), with a large constant factor.  So, the patch
allows clients to disable it.

Future patches should make the feature more efficient, but this will mitigate in
the interim.

Differential Revision: https://reviews.llvm.org/D114981
2021-12-02 22:19:05 +00:00
Christian Kühnel 5bd643d31d [clangd] cleanup of header guard names
Renaming header guards to match the LLVM convention.
This patch was created by automatically applying the fixes from
clang-tidy.

I've removed the [NFC]  tag from the title, as we're adding header guards in some files and thus might trigger behavior changes.

Differential Revision: https://reviews.llvm.org/D113896
2021-12-02 15:58:35 +00:00
Yitzhak Mandelbaum c006ea6bde [clang-tidy] Fix build broken by commit 6a9487df73 (D113148) 2021-12-02 14:41:00 +00:00
CJ Johnson 6a9487df73 Add new clang-tidy check for string_view(nullptr)
Checks for various ways that the `const CharT*` constructor of `std::basic_string_view` can be passed a null argument and replaces them with the default constructor in most cases. For the comparison operators, braced initializer list does not compile so instead a call to `.empty()` or the empty string literal are used, where appropriate.

This prevents code from invoking behavior which is unconditionally undefined. The single-argument `const CharT*` constructor does not check for the null case before dereferencing its input. The standard is slated to add an explicitly-deleted overload to catch some of these cases: wg21.link/p2166

https://reviews.llvm.org/D114823 is a companion change to prevent duplicate warnings from the `bugprone-string-constructor` check.

Reviewed By: ymandel

Differential Revision: https://reviews.llvm.org/D113148
2021-12-02 13:25:28 +00:00
Kirill Bobyrev d3a4ef3568 [clangd] IncludeClenaer: Don't mark forward declarations of a class if it's declared in the main file
This will mark more headers that are unrelated to used symbol but contain its
forawrd declaration. E.g. the following are examples of headers forward
declaring `llvm::StringRef`:

- clang/include/clang/Basic/Cuda.h
- llvm/include/llvm/Support/SHA256.h
- llvm/include/llvm/Support/TrigramIndex.h
- llvm/include/llvm/Support/RandomNumberGenerator.
- ... and more (~50 in total)

This patch is a reduced version of D112707 which was controversial.

Reviewed By: kadircet

Differential Revision: https://reviews.llvm.org/D114864
2021-12-02 10:26:08 +01:00
Fabian Wolff 987a21522f [clang-tidy] Use `hasCanonicalType()` matcher in `bugprone-unused-raii` check
Fixes PR#52217.

Reviewed By: simon.giesecke

Differential Revision: https://reviews.llvm.org/D113429
2021-12-02 01:53:12 +01:00
Fabian Wolff 844a8d3cec Fix false positives in `fuchsia-trailing-return` check involving deduction guides
Fixes PR#47614. Deduction guides, implicit or user-defined, look like
function declarations in the AST. They aren't really functions, though,
and they always have a trailing return type, so it doesn't make sense
to issue this warning for them.
2021-12-01 15:28:01 -05:00
Michael Jones 155f5a6dac [libc][clang-tidy] fix namespace check for externals
Up until now, all references to `errno` were marked with `NOLINT`, since
it was technically calling an external function. This fixes the lint
rules so that `errno`, as well as `malloc`, `calloc`, `realloc`, and
`free` are all allowed to be called as external functions. All of the
relevant `NOLINT` comments have been removed, and the documentation has
been updated.

Reviewed By: sivachandra, lntue, aaron.ballman

Differential Revision: https://reviews.llvm.org/D113946
2021-11-30 11:44:24 -08:00
Kadir Cetinkaya 3356d8837e
[clangd] Make std symbol generation script python3 friendly
Differential Revision: https://reviews.llvm.org/D114723
2021-11-30 10:15:36 +01:00
Carlos Galvez 5bbe50148f [clang-tidy] Warn on functional C-style casts
The google-readability-casting check is meant to be on par
with cpplint's readability/casting check, according to the
documentation. However it currently does not diagnose
functional casts, like:

float x = 1.5F;
int y = int(x);

This is detected by cpplint, however, and the guidelines
are clear that such a cast is only allowed when the type
is a class type (constructor call):

> You may use cast formats like `T(x)` only when `T` is a class type.

Therefore, update the clang-tidy check to check this
case.

Differential Revision: https://reviews.llvm.org/D114427
2021-11-30 07:31:17 +00:00
Salman Javed c7aa358798 [clang-tidy] Fix pr48613: "llvm-header-guard uses a reserved identifier"
Fixes https://bugs.llvm.org/show_bug.cgi?id=48613.

llvm-header-guard is suggesting header guards with leading underscores
if the header file path begins with a '/' or similar special character.
Only reserved identifiers should begin with an underscore.

Differential Revision: https://reviews.llvm.org/D114149
2021-11-30 12:43:35 +13:00
Zhuo Zhang d96f92ff16 fix typos in comments 2021-11-29 14:06:33 +01:00
Balazs Benics a8120a7711 [clang-tidy] Ignore narrowing conversions in case of bitfields
Bitfields are special. Due to integral promotion [conv.prom/5] bitfield
member access expressions are frequently wrapped by an implicit cast to
`int` if that type can represent all the values of the bitfield.

Consider these examples:
  struct SmallBitfield { unsigned int id : 4; };
  x.id & 1;             (case-1)
  x.id & 1u;            (case-2)
  x.id << 1u;           (case-3)
  (unsigned)x.id << 1;  (case-4)

Due to the promotion rules, we would get a warning for case-1. It's
debatable how useful this is, but the user at least has a convenient way
of //fixing// it by adding the `u` unsigned-suffix to the literal as
demonstrated by case-2. However, this won't work for shift operators like
the one in case-3. In case of a normal binary operator, both operands
contribute to the result type. However, the type of the shift expression is
the promoted type of the left operand. One could still suppress this
superfluous warning by explicitly casting the bitfield member access as
case-4 demonstrates, but why? The compiler already knew that the value from
the member access should safely fit into an `int`, why do we have this
warning in the first place? So, hereby we suppress this specific scenario,
when a bitfield's value is implicitly cast to int (likely due to integral
promotion).

Note that the bitshift operation might invoke unspecified/undefined
behavior, but that's another topic, this checker is about detecting
conversion-related defects.

Example AST for `x.id << 1`:
  BinaryOperator 'int' '<<'
  |-ImplicitCastExpr 'int' <IntegralCast>
  | `-ImplicitCastExpr 'unsigned int' <LValueToRValue>
  |   `-MemberExpr 'unsigned int' lvalue bitfield .id
  |     `-DeclRefExpr 'SmallBitfield' lvalue ParmVar 'x' 'SmallBitfield'
  `-IntegerLiteral 'int' 1

Reviewed By: courbet

Differential Revision: https://reviews.llvm.org/D114105
2021-11-29 09:56:43 +01:00
Balazs Benics e1d0673aee [clang-tidy] Fix crashing altera-struct-pack-align on invalid RecordDecls
Reviewed-By: martong

Differential Revision: https://reviews.llvm.org/D114256
2021-11-29 09:56:43 +01:00
Balazs Benics 0540485436 [libtooling][clang-tidy] Fix crashing on rendering invalid SourceRanges
Invalid SourceRanges can occur generally if the code does not compile,
thus we expect clang error diagnostics.
Unlike `clang`, `clang-tidy` did not swallow invalid source ranges, but
tried to highlight them, and blow various assertions.

The following two examples produce invalid source ranges, but this is
not a complete list:

  void test(x); // error: unknown type name 'x'
  struct Foo {
    member; // error: C++ requires a type specifier for all declarations
  };

Thanks @whisperity helping me fix this.

Reviewed-By: xazax.hun

Differential Revision: https://reviews.llvm.org/D114254
2021-11-29 09:56:43 +01:00
Balazs Benics 0685e83534 Fix cppcoreguidelines-virtual-base-class-destructor in macros
The `cppcoreguidelines-virtual-base-class-destructor` checker crashed on
this example:

  #define DECLARE(CLASS) \
  class CLASS {          \
  protected:             \
    virtual ~CLASS();    \
  }
  DECLARE(Foo); // no-crash

The checker will hit the following assertion:

  clang-tidy: llvm/include/llvm/ADT/Optional.h:196: T &llvm::optional_detail::OptionalStorage<clang::Token, true>::getValue() & [T = clang::Token]: Assertion `hasVal' failed."

It turns out, `Lexer::findNextToken()` returned `llvm::None` within the
`getVirtualKeywordRange()` function when the `VirtualEndLoc`
SourceLocation represents a macro expansion.
To prevent this from happening, I decided to propagate the `llvm::None`
further up and only create the removal of `virtual` if the
`getVirtualKeywordRange()` succeeds.

I considered an alternative fix for this issue:
I could have checked the `Destructor.getLocation().isMacroID()` before
doing any Fixit calculation inside the `check()` function.
In contrast to this approach my patch will preserve the diagnostics and
drop the fixits only if it would have crashed.

Reviewed By: whisperity

Differential Revision: https://reviews.llvm.org/D113558
2021-11-29 09:56:43 +01:00
Kirill Bobyrev 34cc210aa8
[clangd] IncludeCleaner: Attribute symbols from non self-contained headers to their parents
When a symbol comes from the non self-contained header, we recursively uplift
the file we consider used to the first includer that has a header guard. We
need to do this while we still have FileIDs because every time a non
self-contained header is included, it gets a new FileID but is later
deduplicated by HeaderID and it's not possible to understand where it was
included from.

Based on D114370.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D114623
2021-11-26 16:20:48 +01:00
Kirill Bobyrev cd0ca5a0ea
[clangd] Record information about non self-contained headers in IncludeStructure
This will be useful for IncludeCleaner.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D114370
2021-11-26 14:12:54 +01:00
Quinn Pham c3dc6b081d [NFC][clang-tools-extra] Inclusive language: replace master with main
[NFC] As part of using inclusive language within the llvm project, this patch
replaces master with main in `SubModule2.h`.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D114100
2021-11-25 11:01:16 -06:00
Kirill Bobyrev 59e4a67081
[clangd] Move IncludeCleaner tracer to the actual computation
This way we won't get results with 0 ms for all the users with disabled
IncludeCleaner.
2021-11-25 13:19:01 +01:00
Sheldon Neuberger e2cad4df22
[clangd] Add ObjC method support to prepareCallHierarchy
This fixes "textDocument/prepareCallHierarchy" in clangd for ObjC methods. Details at https://github.com/clangd/vscode-clangd/issues/247.

clangd uses Decl::isFunctionOrFunctionTemplate to check if the decl given in a prepareCallHierarchy request is eligible for prepareCallHierarchy. We change to use isFunctionOrMethod which includes functions and ObjC methods.

Reviewed By: kadircet

Differential Revision: https://reviews.llvm.org/D114058
2021-11-25 11:23:24 +01:00
Kadir Cetinkaya cdd37e2e47
[clangd] Disable hicpp-invalid-access-moved inside clangd 2021-11-25 10:27:45 +01:00
Clement Courbet 3b72448084 [clang-tidy] Add unit tests for `DeclRefExprUtils`.
In preparation for D114539.
2021-11-24 16:47:55 +01:00
Clement Courbet ba4411e7c6 [clang-tidy] performance-unnecessary-copy-initialization: Fix false negative.
`isConstRefReturningMethodCall` should be considering
`CXXOperatorCallExpr` in addition to `CXXMemberCallExpr`. Clang considers
these to be distinct (`CXXOperatorCallExpr` derives from `CallExpr`, not
`CXXMemberCallExpr`), but we don't care in the context of this
check.

This is important because of
`std::vector<Expensive>::operator[](size_t) const`.

Differential Revision: https://reviews.llvm.org/D114249
2021-11-24 08:07:21 +01:00
Salman Javed a82942dd07 Add missing clang-tidy args in index.rst (NFC)
The RST docs have gone out of sync with the command-line args that the
clang-tidy program actually supports.
2021-11-22 22:50:05 +13:00
Kirill Bobyrev b5f20372a8
[clangd] IncludeCleaner: Mark possible expr resolutions as used
Fixes: https://github.com/clangd/clangd/issues/934

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D114287
2021-11-22 10:44:24 +01:00
Salman Javed 83484f8472 Fix nits in clang-tidy's documentation (NFC)
Add commas, articles, and conjunctions where missing.
2021-11-22 21:10:24 +13:00
Felix Berger fefe20b993 [clang-tidy] performance-unnecessary-copy-initialization: Correctly match the type name of the thisPointertype.
The matching did not work correctly for pointer and reference types.

Differential Revision: https://reviews.llvm.org/D114212

Reviewed-by: courbet
2021-11-20 15:13:41 -05:00
Sam McCall f764a1a5bd [clangd] Avoid possible crash: apply configuration after binding methods
The configuration may kick off indexing, which may involve sending LSP
messages.
The crash is fiddly to reproduce in a hermetic test (we need background
indexing on without disk storage, and to handle server->client messages
in LSPClient...)

Fixes https://github.com/clangd/clangd/issues/926
2021-11-20 01:13:38 +01:00
Fabian Wolff 6259016361 [clang-tidy] Fix false positive in readability-identifier-naming check involving override attribute
Overriding methods should not get a readability-identifier-naming
warning because the issue can only be fixed in the base class; but the
current check for whether a method is overriding does not take the
override attribute into account.

Differential Revision: https://reviews.llvm.org/D113830
2021-11-19 22:31:11 +13:00
Matt Beardsley 85e03cb7eb [clang-tidy] fix debug-only test failure
The clang-tidy/infrastructure/pr37091.cpp test inherits the top-level .clang-tidy configuration because it doesn't specify its own checks. It'd be a more stable test if it operates independently of the top-level .clang-tidy settings.

I've made the clang-tidy/infrastructure/pr37091.cpp test independent of the top-level .clang-tidy (picked an arbitrary check that I saw another clang-tidy/infrastructure test was also using: clang-tidy/infrastructure/temporaries.cpp)

Reviewed By: kbobyrev

Differential Revision: https://reviews.llvm.org/D114034
2021-11-19 10:19:07 +01:00
Adam Czachorowski 55a79318c6 [clang][clangd] Improve signature help for variadic functions.
This covers both C-style variadic functions and template variadic w/
parameter packs.

Previously we would return no signatures when working with template
variadic functions once activeParameter reached the position of the
parameter pack (except when it was the only param, then we'd still
show it when no arguments were given). With this commit, we now show
signathure help correctly.

Additionally, this commit fixes the activeParameter value in LSP output
of clangd in the presence of variadic functions (both kinds). LSP does
not allow the activeParamter to be higher than the number of parameters
in the active signature. With "..." or parameter pack being just one
argument, for all but first argument passed to "..." we'd report
incorrect activeParameter value. Clients such as VSCode would then treat
it as 0, as suggested in the spec) and highlight the wrong parameter.

In the future, we should add support for per-signature activeParamter
value, which exists in LSP since 3.16.0. This is not part of this
commit.

Differential Revision: https://reviews.llvm.org/D111318
2021-11-18 15:50:47 +01:00
Christian Kühnel 7aa2ce0fab [NFC][clangd] fix clang-tidy finding on isa_and_nonnull
This is a cleanup of the only llvm-prefer-isa-or-dyn-cast-in-conditionals finding in the clangd code base. This patch was created by automatically applying the fixes from clang-tidy.

Differential Revision: https://reviews.llvm.org/D113899
2021-11-18 09:16:54 +00:00
Kadir Cetinkaya e76e572989
[clangd] Dont include file version in task name
This will drop file version information from span names, reducing
overall cardinality and also effect logging when skipping actions in scheduler.

Differential Revision: https://reviews.llvm.org/D113390
2021-11-17 19:10:09 +01:00
Christian Kühnel ec4a2c9565 [NFC][clangd] cleanup llvm-else-after-return findings
Cleanup of clang-tidy findings: removing "else" after a return statement
to improve readability of the code.

This patch was created by applying the clang-tidy fixes automatically.

Differential Revision: https://reviews.llvm.org/D113892
2021-11-17 14:37:03 +00:00
Haojian Wu 4ea066acc9 [clangd] Fix assertion crashes on unmatched NOLINTBEGIN comments.
The overload shouldSuppressDiagnostic seems unnecessary, and it is only
used in clangd.

This patch removes it and use the real one (suppression diagnostics are
discarded in clangd at the moment).

Fixes https://github.com/clangd/clangd/issues/929

Differential Revision: https://reviews.llvm.org/D113999
2021-11-17 15:31:38 +01:00
Christian Kühnel 75a078455f [NFC] disabling clang-tidy check readability-identifier-naming in Protocol.h
The file follows the LSP syntax, so we're intentially deviating
from the LLVM coding standard.

Differential Revision: https://reviews.llvm.org/D113889
2021-11-16 15:25:43 +00:00
Christian Kühnel 274f12a44c [NFC][clangd] fix llvm-namespace-comment finding
Fixing the clang-tidy finding.

Differential Revision: https://reviews.llvm.org/D113895
2021-11-16 15:10:32 +00:00
Christian Kühnel d2da1a2f40 [NFC][clangd] cleaning up unused "using"
Cleaning up unused "using" declarations.
This patch was generated from automatically applyning clang-tidy fixes.

Differential Revision: https://reviews.llvm.org/D113891
2021-11-16 13:09:49 +00:00
Fabian Wolff 738e7f1231 Fix false positive in `bugprone-throw-keyword-missing` check
Fixes PR#52400. The tests for bugprone-throw-keyword-missing actually
already contain exceptions as class members, but not as members with
initializers, which was probably just an oversight.
2021-11-16 07:09:17 -05:00
Carlos Galvez 9699c0fea3 [clang-tidy][NFC] Simplify ClangTidyStats
- Use NSDMI and remove constructor.

Differential Revision: https://reviews.llvm.org/D113847
2021-11-16 07:36:05 +00:00
Matheus Izvekov c9e46219f3
[clang] retain type sugar in auto / template argument deduction
This implements the following changes:
* AutoType retains sugared deduced-as-type.
* Template argument deduction machinery analyses the sugared type all the way
down. It would previously lose the sugar on first recursion.
* Undeduced AutoType will be properly canonicalized, including the constraint
template arguments.
* Remove the decltype node created from the decltype(auto) deduction.

As a result, we start seeing sugared types in a lot more test cases,
including some which showed very unfriendly `type-parameter-*-*` types.

Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>

Reviewed By: rsmith, #libc, ldionne

Differential Revision: https://reviews.llvm.org/D110216
2021-11-15 23:07:45 +01:00
Kirstóf Umann d896c9f40a Fix an unused variable warning 2021-11-15 15:45:43 +01:00
Kristóf Umann 29a8d45c5a [clang-tidy] Fix a crash in modernize-loop-convert around conversion operators
modernize-loop-convert checks and fixes when a loop that iterates over the
elements of a container can be rewritten from a for(...; ...; ...) style into
the "new" C++11 for-range format. For that, it needs to parse the elements of
that loop, like its init-statement, such as ItType it = cont.begin().
modernize-loop-convert checks whether the loop variable is initialized by a
begin() member function.

When an iterator is initialized with a conversion operator (e.g. for
(const_iterator it = non_const_container.begin(); ...), attempts to retrieve the
name of the initializer expression resulted in an assert, as conversion
operators don't have a valid IdentifierInfo.

I fixed this by making digThroughConstructors dig through conversion operators
as well.

Differential Revision: https://reviews.llvm.org/D113201
2021-11-15 13:11:29 +01:00
Fabian Wolff c3e3c76209 [clang-tidy] Fix `bugprone-use-after-move` check to also consider moves in constructor initializers
Fixes PR#38187. Constructors are actually already checked,
but only as functions, i.e. the check only looks at the
constructor body and not at the initializers, which misses
the (common) case where constructor parameters are moved
as part of an initializer expression.

One remaining false negative is when both the move //and//
the use-after-move occur in constructor initializers.
This is a lot more difficult to handle, though, because
the `bugprone-use-after-move` check is currently based on
a CFG that only takes the body into account, not the
initializers, so e.g. initialization order would have to
manually be considered. I will file a follow-up issue for
this once PR#38187 is closed.

Reviewed By: carlosgalvezp

Differential Revision: https://reviews.llvm.org/D113708
2021-11-15 07:41:35 +00:00
Shao-Ce SUN 0c660256eb [NFC] Trim trailing whitespace in *.rst 2021-11-15 09:17:08 +08:00
Matheus Izvekov 6438a52df1
Revert "[clang] retain type sugar in auto / template argument deduction"
This reverts commit 4d8fff477e.
2021-11-15 00:29:05 +01:00
Sam McCall 8ac9d2ae58 [clangd] Fix function-arg-placeholder suppression with macros.
While here, unhide function-arg-placeholders flag. It's reasonable to want and
maybe we should consider making it default.

Fixes https://github.com/clangd/clangd/issues/922

Differential Revision: https://reviews.llvm.org/D113765
2021-11-13 20:50:51 +01:00
Matheus Izvekov 4d8fff477e
[clang] retain type sugar in auto / template argument deduction
This implements the following changes:
* AutoType retains sugared deduced-as-type.
* Template argument deduction machinery analyses the sugared type all the way
down. It would previously lose the sugar on first recursion.
* Undeduced AutoType will be properly canonicalized, including the constraint
template arguments.
* Remove the decltype node created from the decltype(auto) deduction.

As a result, we start seeing sugared types in a lot more test cases,
including some which showed very unfriendly `type-parameter-*-*` types.

Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>

Reviewed By: rsmith

Differential Revision: https://reviews.llvm.org/D110216
2021-11-13 03:35:22 +01:00
Sam McCall 4fb62e1383 [clangd] Mark completions as plain-text when there's no snippet part
This helps nvim support the "repeat" action

Fixes https://github.com/clangd/clangd/issues/922
2021-11-12 18:44:20 +01:00
Kadir Cetinkaya ebda5e1e52
[clangd] Fix use-after-free in test 2021-11-12 14:50:23 +01:00
Kadir Cetinkaya 7d668ae38d
[clangd] Mark macros from preamble for code completion
If the main file is a header, mark the marcos defined in its preamble
section as code-completion ready.

Fixes https://github.com/clangd/clangd/issues/921.

Differential Revision: https://reviews.llvm.org/D113555
2021-11-12 14:01:14 +01:00
Adrian Kuegel 1d7fdbbc18 Revert "[clang] retain type sugar in auto / template argument deduction"
This reverts commit 9b6036deed.
Breaks two libc++ tests.
2021-11-12 13:21:59 +01:00
Salman Javed 9089a1dff0 [clang-tidy] Re-apply 0076957 with fix for failing ASan tests
Re-apply "Fix lint warning in ClangTidyDiagnosticConsumer.cpp (NFC)"
with fixes for the failing ASan tests.

This reverts commit 74add1b6d6.
2021-11-13 00:01:12 +13:00
Salman Javed 379935e5a4 Re-land commit 735e433 after fixing buildbot issue
This reverts commit d73e27d.
2021-11-12 22:59:50 +13:00
Salman Javed d73e27d91f Revert "Make minor fixes to docs based on post-commit review of commit 5de69e1"
Sphinx buildbot failing.
This reverts commit 735e4332e2.
2021-11-12 22:42:38 +13:00
Salman Javed 735e4332e2 Make minor fixes to docs based on post-commit review of commit 5de69e1
- Jaro–Winkler and Sørensen–Dice should use en-dashes not regular
  dashes. In reStructuredText this is typed as `--`.
- Letters at the beginning of a sentence should be capitalized.
2021-11-12 22:39:16 +13:00
Matheus Izvekov 9b6036deed
[clang] retain type sugar in auto / template argument deduction
This implements the following changes:
* AutoType retains sugared deduced-as-type.
* Template argument deduction machinery analyses the sugared type all the way
down. It would previously lose the sugar on first recursion.
* Undeduced AutoType will be properly canonicalized, including the constraint
template arguments.
* Remove the decltype node created from the decltype(auto) deduction.

As a result, we start seeing sugared types in a lot more test cases,
including some which showed very unfriendly `type-parameter-*-*` types.

Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>

Reviewed By: rsmith

Differential Revision: https://reviews.llvm.org/D110216
2021-11-12 01:16:31 +01:00
Aaron Ballman ac8c813b89 Fix Sphinx build diagnostics
This won't parse as either C or C++ according to Sphinx, so switched to
text to appease Sphinx.
2021-11-11 14:38:11 -05:00
Adrian Vogelsgesang 8188484daa [clang-apply-replacements] Correctly handle relative paths
The fixes from the YAML file can refer to relative paths.
Those relative paths are meant to be resolved relative to the
corresponding `build directory`.
However, `clang-apply-replacements` currently interprets all
paths relative to its own working directory. This causes issues,
e.g., when `clang-apply-replacements` is run from outside of
the original build directory.

This commit adjusts `clang-apply-replacements` to take the build
directory into account when resolving relative file paths.

Reviewed By: ymandel

Differential Revision: https://reviews.llvm.org/D112647
2021-11-11 18:28:43 +00:00
serge-sans-paille 26d195d8b3 Replace include by forward declaration in test case
This should fix the remaining buildbot issue for the misleading identifier
detection pass.

Differential Revision: https://reviews.llvm.org/D112914
2021-11-10 20:34:05 +01:00
Adam Czachorowski 7a2b1bdb4c [clang] Do not crash in APValue::prettyPrint() on forward-decl structs.
The call to getTypeSizeInChars() is replaced with
getTypeSizeInCharsIfKnown(), which does not crash on forward declared
structs. This only affects printing.

Differential Revision: https://reviews.llvm.org/D113570
2021-11-10 17:17:00 +01:00
Whisperity 164ee457a0 [NFC][clang-tidy] Fixup documentation file names for 'readability-container-data-pointer' 2021-11-10 10:25:54 +01:00
serge-sans-paille a35efc4dcb Misleading unicode identifier detection pass
Detect when an identifier contains some Right-To-Left characters.
This pass relates to https://trojansource.codes/

Example of misleading source:

    short int א = (short int)0;
    short int ג = (short int)12345;

    int main() {
      int א = ג; // a local variable, set to zero?
      printf("ג is %d\n", ג);
      printf("א is %d\n", א);
    }

This is a recommit of 299aa4dfa1 with missing
option registration fixed.

Differential Revision: https://reviews.llvm.org/D112914
2021-11-10 10:21:27 +01:00
Sam McCall 63667c1896 [clangd] Trace per-token time in clangd --check 2021-11-10 08:22:48 +01:00
Salman Javed b4f6f1c936 [clang-tidy] Fix llvm-header-guard so that it works with Windows paths
Fixes pr40372 (https://bugs.llvm.org/show_bug.cgi?id=40372).

The llvm-header-guard check does not take into account that the path
separator on Windows is `\`, not `/`.

This means that instead of suggesting a header guard in the form of:
LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FOO_H

it incorrectly suggests:
C:\LLVM_PROJECT\CLANG_TOOLS_EXTRA\CLANG_TIDY\FOO_H

Differential Revision: https://reviews.llvm.org/D113450
2021-11-10 18:35:57 +13:00
serge-sans-paille c178ada3c3 Revert "Misleading unicode identifier detection pass"
This reverts commit 7f92a1a84b.

It triggers an assert, see http://45.33.8.238/linux/60293/step_9.txt

"AST/Decl.h:277: llvm::StringRef clang::NamedDecl::getName() const: Assertion `Name.isIdentifier() && "Name is not a simple identifier"' failed."
2021-11-09 22:40:18 +01:00
serge-sans-paille 7f92a1a84b Misleading unicode identifier detection pass
Detect when an identifier contains some Right-To-Left characters.
This pass relates to https://trojansource.codes/

This is a recommit of 299aa4dfa1 with missing
option registration fixed.

Differential Revision: https://reviews.llvm.org/D112914
2021-11-09 21:46:35 +01:00