[all-commits] [llvm/llvm-project] e61a35: [libc] Handle PTHREAD_NULL in pthread_equal (#227856)

[Jeff Bailey via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e61a355ea7dad6311139bef70e0562d75c6fed1c
      https://github.com/llvm/llvm-project/commit/e61a355ea7dad6311139bef70e0562d75c6fed1c
  Author: Jeff Bailey <jbailey at raspberryginger.com>
  Date:   2026-09-30 (Wed, 30 Sep 2026)

  Changed paths:
    M libc/src/__support/threads/linux/thread.cpp
    M libc/src/__support/threads/thread.h
    M libc/test/integration/src/pthread/pthread_equal_test.cpp

  Log Message:
  -----------
  [libc] Handle PTHREAD_NULL in pthread_equal (#227856)

POSIX.1-2024 specifies that pthread_equal must accept PTHREAD_NULL for
either or both arguments. Previously, Thread::operator== dereferenced
attrib->tid, which crashed when passed a null or zero-initialized
pthread_t.

Compare Thread::attrib pointers directly in an inline constexpr
operator== in thread.h, matching how Thread::join and
pthread_getunique_np identify threads. Added PTHREAD_NULL test cases to
pthread_equal_test and updated file headers in the touched files.

Assisted-by: Automated tooling, human reviewed.



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