threadx.git/ports_smp/linux/gnu/inc, branch v6.4.1_cert

Covered the byte allocate's overwritten trace entry

2026-09-21T00:08:56Z

The byte allocate records a trace event on the way in, saves the entry's time stamp, and comes back to write the address it returned into that same entry -- but only if the time stamp says nothing overwrote the entry meanwhile. Nothing in the kernel writes a trace event inside the window, so the other arm had no agent and no test. The Linux SMP port's TX_BYTE_ALLOCATE_EXTENSION gains a second clause, guarded by its own flag and calling a routine the harness declares weakly, in the shape TX_BYTE_RELEASE_EXTENSION already uses. The hook runs between the restore and the disable that bracket the pool search, which on SMP is a real release of the protection rather than an interrupt gap. A new test filters the byte pool event class so the allocate's own insert writes nothing and leaves the buffer parked on the saved entry, then lets the hook write a user event onto it; neither lever reaches the arm without the other. No kernel symbol is replaced and the allocate runs its own code end to end. The macro expands inside tx_byte_allocate.c, so the new clause's if is certified-source branch: the union branch denominator moves from 3610 to 3612 and both new outcomes are covered. The arm closes in trace_build alone. Under TX_MISRA_ENABLE the port's trace time source returns a constant, so the comparison reads 0 == 0 whatever the hook writes, and the test asserts the consequence only where the time source is real. 135/135 in each of eight configurations, 3586/3612 branch outcomes on the union basis against 3583/3610 before. Fifty standalone repeats in each of the eight, no failures. Assisted-by: Claude Code (Opus 5)

Stopped the SMP Linux port losing a mutex wake-up to a suspend signal

2026-09-17T22:21:12Z

The SMP Linux port suspends a thread with a signal whose handler calls sigsuspend and does not return until the thread is resumed. That signal can arrive while the thread is parked in pthread_mutex_lock on _tx_linux_mutex; the port knows it can, because _tx_linux_mutex_obtain sets tx_thread_linux_mutex_access around the lock call for exactly this case, and nothing anywhere reads that flag. glibc waits for a contended mutex in a loop that re-arms the futex wait after a signal, and this handler never returns to it. The next release hands its wake-up to that thread, which will not act on it, and any other thread parked on the mutex is never woken, leaving the mutex free with waiters on it. That deadlocks the process: the only thread that can resume the suspended one is the scheduler, and the scheduler takes this mutex on every pass. _tx_linux_mutex_obtain now waits with pthread_mutex_timedlock and retries, so the wait is re-armed every TX_LINUX_MUTEX_RETRY_NSEC and a lost wake-up costs one retry period instead of the process. The period is one millisecond, half the scheduler's own idle period. Nothing else changes. Four hung processes captured untraced, across three tests, show the same state: a thread in sigsuspend on top of pthread_mutex_lock, the scheduler blocked in pthread_mutex_lock, and the mutex reading free. Standalone, threadx_smp_random_resume_suspend_exclusion_test hung 3 times in 100 runs and 2 in 55 before the change and 0 in 400 after it. Assisted-by: Claude Code (Opus 5)

Update version number to 6.4.1

2024-02-27T06:00:58Z

Update version id string.

2024-01-30T00:39:18Z

Update copyright.

2024-01-29T05:51:15Z

Update release date and version (#338)

2023-12-28T02:51:29Z

* Update version number in API header * Update release date and version

Update release version to 6.3.0 and date to 10-31-2023 (#308)

2023-10-23T07:31:03Z

Release 6.2.1 on 08 Mar 2023. Expand to see details.

2023-03-08T08:26:22Z

cee19603d Include tx_user.h conditionally. e40e08007 Update owners d69641273 Update release date and version 394aee52f Add tx_user.h to GNU port assembly files 5cca2ddd0 RISC-V 64 bit port for Microchip e0f2c373c Link Winmm.lib that required by the high-resolution timer. 6af472a68 Update Win32 port with high resolution timer. aea7b556a Add DMB ISH barrier inst in ARMv8-A SMP scheduler 19091a262 Add .section .preamble to m3 m4 m7 module ports ced60e1b7 Add missing parenthesis in ports assembly file 309dc77ca Modules Cortex-A7 IAR new port c752a4063 Modules Cortex-A7 GNU new port dc224b90f Fix race condition in tx_thread_wait_abort and update regression test 6e261f5b7 create threadx cmsis-pack

Release 6.1.9

2021-10-14T00:51:26Z

Release 6.1.6

2021-04-03T01:03:21Z