TX_THREAD_STACK_CHECK detects a broken stack, calls the error handler, and then
tests whether the word below the high-water mark still holds the fill pattern.
On the SMP side that second test is a plain if, so a thread whose stack has
just been reported as corrupt goes straight on into _tx_thread_stack_analyze().
Analyzing a stack that is known to be broken is what that function is least
able to do. It binary searches between stack_lowest and stack_highest for the
fill pattern and then scans forward with
while (*stack_ptr == TX_STACK_FILL)
which has no bound of its own and no reason to terminate once the pattern it is
looking for is no longer where the pointers say it should be. The non-SMP copy
was given an else for exactly this reason. The SMP copy never was, and the two
macros are otherwise identical, line for line, so this single keyword was the
whole of the divergence.
The path is live in CI rather than theoretical. Instrumenting the internal
handler and running all 110 binaries of stack_checking_build shows
threadx_thread_stack_checking_test reaching it four times per run, on a thread
whose stack the test corrupts on purpose. Every one of those four currently
falls through into the analyze it should be skipping.
This is not the timeout the SMP suite has been failing on.
threadx_thread_priority_change never reaches the error handler at all, so
whatever wedges it in teardown is something else. Worth closing regardless: a
runaway scan inside stack analysis would present as a test that stops producing
output and is eventually killed, which is the shape that has been costing this
suite whole runs, and it would be indistinguishable in the log from the hang
already being chased.
Verified on both configurations that define TX_ENABLE_STACK_CHECKING.
threadx_thread_stack_checking_test, the one test that exercises the changed
branch, passes 60 consecutive runs, and stack_checking_build and
stack_checking_rand_fill_build both pass 110 of 110, repeated at the
parallelism CI uses.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Windows x64 port and regression suite
This PR adds the Windows x64 (Win64) simulation port for both the standalone
and SMP variants of ThreadX, along with the full CMake build and test
infrastructure needed to run the regression suite on Windows.
New ports
Win64 standalone (ports/win64/vs_2022): self-contained Windows simulation
port using Win32 threading primitives as virtual cores. Includes CMake
integration, build/test scripts, and MSVC project files.
Win64 SMP (ports/win64_smp/vs_2022): multi-core Windows simulation port.
Supports up to 4 virtual cores backed by Windows host threads.
Scheduler and timer improvements
The initial port used coarse polling and synchronous SuspendThread/ResumeThread
pairs throughout the scheduler hot path. Several rounds of optimization reduced
the SMP regression suite runtime from ~150 s to ~78 s (-48%), with no
regressions:
- Replaced scheduler polling with an event-driven wake path; switched the
simulated timer to one-shot rearming to eliminate catch-up ticks.
- Skip SuspendThread when _tx_thread_preempt_disable != 0 (new suspension
type 3) -- the primary optimization, yielding up to 7.9x speedup on
preemption-heavy tests.
- Skip SuspendThread when a thread is spinning on the Win32 critical section
(suspension type 4), and fix a stale-TLS bug in
_tx_win32_critical_section_obtain that could stamp mutex_access on the
wrong virtual core.
- Added a 2 ms scheduler event timeout (matching the Linux SMP port) to
prevent stalls on any missed SetEvent.
- Enabled high-resolution waitable timers (SetWaitableTimerEx) for accurate
100 Hz tick cadence.
- Increased TX_WIN32_CONTENTION_PAUSE_COUNT from 64 to 256 to reduce
SwitchToThread overhead under heavy CS contention.
Build and test infrastructure
- Hardened the Windows build wrapper (scripts/build_tx.ps1): invoke Ninja
directly for Ninja build trees, fix timeout detection, add a default build
timeout, and limit fallback replay to real timeout cases.
- Added -Clean support to Windows test scripts to remove stale CTest state
before each run.
- Skip Visual Studio DevShell re-entry when the active MSVC environment
already matches the requested architecture.
- Fixed scripts/build_tx.sh (Linux) regression source generation: replaced
brittle exact-string insertion with line-based matching so the interrupt
dispatcher hook is inserted reliably for both simulator ports.
Test suite updates
- Introduced test/tx/regression/threadx_test_port.h with portable macros
(TX_TEST_POINTER_WORD, TX_TEST_STORE_POINTER) for storing pointers in test
arrays on 64-bit targets where ULONG remains 32-bit.
- Adjusted pool-capacity and pointer-storage patterns in regression tests to
use ALIGN_TYPE-sized slots, making the suite correct on 64-bit hosts.
- Restored stricter event flag, sleep, and timer expectations now that
port-level fixes make prior Windows accommodations unnecessary.
- Tightened SMP watchdog and clean-build timeout defaults.
Version metadata
Updated Win32, Win64, and Win64 SMP port version strings to 6.5.1.202602.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Codex (gpt 5.5) <codex@openai.com>
* Fixed MISRA2012 rule 10.4_a
The operands `pool_ptr->tx_byte_pool_fragments' and `2' have essential type categories unsigned 32-bit int and signed 8-bit int, which do not match.
* Fixed MISRA2012 rule 10.4_a
The operands `next_priority' and `TX_MAX_PRIORITIES' have essential type categories unsigned 32-bit int and signed 8-bit int, which do not match.
* Fixed MISRA2012 rule 8.3
Declaration/definition of `_tx_thread_smp_preemptable_threads_get' is inconsistent with previous declaration/definition in types and/or type qualifiers
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
Frédéric DesbiensandClaude Opus 5
MAY
TiejunZhou
Bo Chen (from Dev Box)
Xiuwen CaiandTiejunZhou
Tiejun Zhou
Yuxin Zhou
Scott Larson