Problem: Tests fail on the second run on FreeBSD with ShmTest.RemoveByName failing.
After the first test run completes, subsequent runs fail because shared memory
objects are not properly removed.
Root cause: FreeBSD's shm_unlink() is stricter than Linux about POSIX compliance.
The remove(char const * name) function was calling shm_unlink() without the '/'
prefix, while acquire() was using '/'+name format. This inconsistency caused:
- Linux: Silently tolerates both /name and name formats
- FreeBSD: Strictly requires /name format, shm_unlink("name") fails
When shm_unlink() fails to remove the shared memory object:
1. First test run creates /remove_by_name_test_1
2. Test calls shm::remove("remove_by_name_test_1")
3. shm_unlink("remove_by_name_test_1") fails on FreeBSD (missing '/')
4. Shared memory object remains in the system
5. Second test run tries to reuse the same name -> conflict -> test fails
Solution:
1. Fix remove(char const * name) to prepend '/' to the name for consistency
with acquire() function, ensuring POSIX compliance
2. Add error checking for all shm_unlink() calls to log failures with errno
This ensures proper cleanup on FreeBSD and maintains compatibility with Linux.
Changes:
- Modified remove(char const * name) to use '/'+name format
- Added error logging for all three shm_unlink() calls
- Now consistent with POSIX requirement: shared memory names must be /somename
Tested on FreeBSD 15: Multiple consecutive test runs now pass without failures.
