RTEMS | testsuites/psxtests: add psxmsgq05 priority range checks (!1066)

Tue Feb 17 17:29:06 UTC 2026

Chandan U created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1066

Project:Branches: Chandanuvm/rtems:chandan/psxmsgq05-priority-coverage to rtems/rtos/rtems:main
Author:   Chandan U

**Problem**

At the moment, we don’t have a dedicated POSIX test that checks the MQ_PRIO_MAX boundary and how priority-based insertion behaves in POSIX message queues.
So there isn’t explicit coverage for the valid priority range, out-of-range rejection, or ordering semantics.

**What Changed**

Added a new test psxmsgq05 which exercises priority handling in POSIX message queues.

The test covers:

- Printing and confirming the MQ_PRIO_MAX value provided by the toolchain.

- Verifying that priorities greater than MQ_PRIO_MAX are rejected with EINVAL.

- Sending messages across the full valid range 0 .. MQ_PRIO_MAX.

- Checking receive ordering when mixed priorities are queued.

- Confirming FIFO behavior when multiple messages share the same priority.

**How Tested**

Built for SPARC/ERC32 and ran on the SIS simulator.

**Command used:**

`/path/to/rtems-test --rtems-bsp=erc32-sis \
build/sparc/erc32/testsuites/psxtests/psxmsgq05.exe`

Test completed successfully.
Output includes the printed MQ_PRIO_MAX value and all validation steps.

```
*** BEGIN OF TEST PSXMSGQ 5 ***
*** TEST VERSION: 7.0.0.fb67bc866feae0f0788075f2830b01c60f47d66e-modified
*** TEST STATE: EXPECTED_PASS
*** TEST BUILD:
*** TEST TOOLS: 15.2.0 20250808 (RTEMS 7, RSB 72f17919581ef21a523cb2c5b3e566e10fe20d8d, Newlib 038afec1)
Init - MQ_PRIO_MAX = 32
Init - Open message queue
Init - Validate accepted priorities 0..MQ_PRIO_MAX
Init - Validate mq_send rejects MQ_PRIO_MAX + 1 with EINVAL
Init - Validate mixed-priority receive ordering
Init - Validate FIFO ordering for equal priorities
Init - Close and unlink message queue

*** END OF TEST PSXMSGQ 5 ***
```

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1066
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