clang-p2996

Files

Malavika Samak 86026ee623 [clang-tidy] Warn about misuse of sizeof operator in loops. (#143205 )

The sizeof operator misuses in loop conditionals can be a source of
bugs. The common misuse is attempting to retrieve the number of elements
in the array by using the sizeof expression and forgetting to divide the
value by the sizeof the array elements. This results in an incorrect
computation of the array length and requires a warning from the sizeof
checker.

Example:
```
 int array[20];

void test_for_loop() {
  // Needs warning.
  for(int i = 0; i < sizeof(array); i++) {
    array[i] = i;
  }
}

void test_while_loop() {

  int count = 0;
  // Needs warning. 
  while(count < sizeof(array)) {
    array[count] = 0;
    count = count + 2;
  }
}
```
rdar://151403083

---------

Co-authored-by: MalavikaSamak <malavika2@apple.com>

2025-06-25 10:04:10 -07:00

clang-apply-replacements

Reapply "[clang] Remove intrusive reference count from DiagnosticOptions (#139584 )"

2025-05-22 12:52:03 -07:00

clang-change-namespace

Reapply "[clang] Remove intrusive reference count from DiagnosticOptions (#139584 )"

2025-05-22 12:52:03 -07:00

clang-doc

[clang-doc] document global variables (#145070 )

2025-06-24 11:36:31 -07:00

clang-include-fixer

[clang-tools-extra] Remove unused local variables (NFC) (#142881 )

2025-06-04 22:43:59 -07:00

clang-move

[clang-move] Teach getDeclarationList to return ArrayRef (NFC) (#143278 )

2025-06-08 01:34:02 -07:00

clang-query

Reapply "[clang] Remove intrusive reference count from DiagnosticOptions (#139584 )"

2025-05-22 12:52:03 -07:00

clang-reorder-fields

[clang-reorder-fields] Prevent rewriting unsupported cases (#142149 )

2025-06-22 19:00:11 -07:00

clang-tidy

[clang-tidy] Warn about misuse of sizeof operator in loops. (#143205 )

2025-06-25 10:04:10 -07:00

clangd

[clangd] Implement LSP 3.17 positionEncoding (#142903 )

2025-06-17 19:23:14 +02:00

docs

[clang-tidy] Warn about misuse of sizeof operator in loops. (#143205 )

2025-06-25 10:04:10 -07:00

include-cleaner

Reapply "[clang] Remove intrusive reference count from DiagnosticOptions (#139584 )"

2025-05-22 12:52:03 -07:00

modularize

[modularize] Use range-based for loops (NFC) (#144244 )

2025-06-15 10:32:30 -07:00

pp-trace

[clang-tools-extra] Use llvm::replace (NFC) (#140200 )

2025-05-16 07:30:46 -07:00

test

[clang-tidy] Warn about misuse of sizeof operator in loops. (#143205 )

2025-06-25 10:04:10 -07:00

tool-template

…

unittests

[clang-doc] document global variables (#145070 )

2025-06-24 11:36:31 -07:00

.gitignore

…

CMakeLists.txt

Remove clang-pseudo (#109154 )

2024-09-19 07:54:06 -04:00

LICENSE.TXT

…

Maintainers.txt

[www][docs] Remove last mentions of IRC (#139076 )

2025-05-08 09:40:33 -04:00

README.txt

…

README.txt

//===----------------------------------------------------------------------===//
// Clang Tools repository
//===----------------------------------------------------------------------===//

Welcome to the repository of extra Clang Tools.  This repository holds tools
that are developed as part of the LLVM compiler infrastructure project and the
Clang frontend.  These tools are kept in a separate "extra" repository to
allow lighter weight checkouts of the core Clang codebase.

All discussion regarding Clang, Clang-based tools, and code in this repository
should be held using the standard Clang forum:
  https://discourse.llvm.org/c/clang

Code review for this tree should take place on the standard Clang patch and
commit lists:
  http://lists.llvm.org/mailman/listinfo/cfe-commits

If you find a bug in these tools, please file it in the LLVM bug tracker:
  https://github.com/llvm/llvm-project/issues/