I have problems with Posix GCC port.
I’m using FreeRTOS on x86-64 to run some tests and at the end call vTaskEndScheduler().
I’ve created MRE based on blinky example app:
diff --git a/FreeRTOS/Demo/Posix_GCC/main.c b/FreeRTOS/Demo/Posix_GCC/main.c
index e89da3b9e..9a2fc0d3d 100644
--- a/FreeRTOS/Demo/Posix_GCC/main.c
+++ b/FreeRTOS/Demo/Posix_GCC/main.c
@@ -82,11 +82,13 @@
#endif
/* Demo type is passed as an argument */
-#ifdef USER_DEMO
- #define mainSELECTED_APPLICATION USER_DEMO
-#else /* Default Setting */
- #define mainSELECTED_APPLICATION FULL_DEMO
-#endif
+// #ifdef USER_DEMO
+// #define mainSELECTED_APPLICATION USER_DEMO
+// #else /* Default Setting */
+// #define mainSELECTED_APPLICATION FULL_DEMO
+// #endif
+
+#define mainSELECTED_APPLICATION USER_DEMO
/* This demo uses heap_3.c (the libc provided malloc() and free()). */
diff --git a/FreeRTOS/Demo/Posix_GCC/main_blinky.c b/FreeRTOS/Demo/Posix_GCC/main_blinky.c
index c599c933a..d451d2841 100644
--- a/FreeRTOS/Demo/Posix_GCC/main_blinky.c
+++ b/FreeRTOS/Demo/Posix_GCC/main_blinky.c
@@ -174,9 +174,9 @@ void main_blinky( void )
* there was insufficient FreeRTOS heap memory available for the idle and/or
* timer tasks to be created. See the memory management section on the
* FreeRTOS web site for more details. */
- for( ; ; )
- {
- }
+ // for( ; ; )
+ // {
+ // }
}
/*-----------------------------------------------------------*/
@@ -205,6 +205,10 @@ static void prvQueueSendTask( void * pvParameters )
* will not block - it shouldn't need to block as the queue should always
* have at least one space at this point in the code. */
xQueueSend( xQueue, &ulValueToSend, 0U );
+
+ if (xNextWakeTime > 400) {
+ vTaskEndScheduler();
+ }
}
}
/*-----------------------------------------------------------*/
I’ve compiled as cmake .; make.
Running in loop with until ! nice -n 20 ./posix_demo; do date; done.
After some time (10-100 loops) posix_demo hangs.
Attaching to gdb shows following:
# sudo gdb -p 35553
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Attaching to process 35553
[New LWP 35559]
[New LWP 35557]
[New LWP 35556]
[New LWP 35555]
[New LWP 35554]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x0000719b4b845ed8 in __GI___sigtimedwait (set=set@entry=0x7fff1df3ff70, info=info@entry=0x7fff1df3fea0, timeout=timeout@entry=0x0) at ../sysdeps/unix/sysv/linux/sigtimedwait.c:31
warning: 31 ../sysdeps/unix/sysv/linux/sigtimedwait.c: Nie ma takiego pliku ani katalogu
(gdb) info thr
Id Target Id Frame
* 1 Thread 0x719b4ba7e740 (LWP 35553) "Scheduler" 0x0000719b4b845ed8 in __GI___sigtimedwait (set=set@entry=0x7fff1df3ff70, info=info@entry=0x7fff1df3fea0, timeout=timeout@entry=0x0) at ../sysdeps/unix/sysv/linux/sigtimedwait.c:31
2 Thread 0x719b484006c0 (LWP 35559) "Scheduler timer" 0x0000719b4b8f38e3 in __GI___clock_nanosleep (clock_id=clock_id@entry=0, flags=flags@entry=0, req=req@entry=0x719b483ffe70, rem=rem@entry=0x0) at ../sysdeps/unix/sysv/linux/clock_nanosleep.c:48
3 Thread 0x719b498006c0 (LWP 35557) "IDLE" 0x0000719b4b89dffd in __futex_abstimed_wait_common64 (private=0, futex_word=0x6218c9f76e60, expected=0, op=393, abstime=0x0, cancel=true) at ./nptl/futex-internal.c:57
4 Thread 0x719b4a2006c0 (LWP 35556) "TX" futex_wait (futex_word=0x6218c9f76fa0, expected=2, private=0) at ../sysdeps/nptl/futex-internal.h:146
5 Thread 0x719b4ac006c0 (LWP 35555) "Rx" 0x0000719b4b89dffd in __futex_abstimed_wait_common64 (private=29083, futex_word=0x6218c9f76a24, expected=0, op=393, abstime=0x0, cancel=true) at ./nptl/futex-internal.c:57
6 Thread 0x719b4b6006c0 (LWP 35554) "TzCtrl" 0x0000719b4b89dffd in __futex_abstimed_wait_common64 (private=0, futex_word=0x6218c9f562f4, expected=0, op=393, abstime=0x0, cancel=true) at ./nptl/futex-internal.c:57
(gdb) thr 4
[Switching to thread 4 (Thread 0x719b4a2006c0 (LWP 35556))]
#0 futex_wait (futex_word=0x6218c9f76fa0, expected=2, private=0) at ../sysdeps/nptl/futex-internal.h:146
warning: 146 ../sysdeps/nptl/futex-internal.h: Nie ma takiego pliku ani katalogu
(gdb) bt
#0 futex_wait (futex_word=0x6218c9f76fa0, expected=2, private=0) at ../sysdeps/nptl/futex-internal.h:146
#1 __GI___lll_lock_wait (futex=futex@entry=0x6218c9f76fa0, private=0) at ./nptl/lowlevellock.c:49
#2 0x0000719b4b8a5541 in lll_mutex_lock_optimized (mutex=0x6218c9f76fa0) at ./nptl/pthread_mutex_lock.c:48
#3 ___pthread_mutex_lock (mutex=0x6218c9f76fa0) at ./nptl/pthread_mutex_lock.c:93
#4 0x00006218a6eb583e in event_signal (ev=0x6218c9f76fa0) at /data/code/FreeRTOS/FreeRTOS/Source/portable/ThirdParty/GCC/Posix/utils/wait_for_event.c:104
#5 0x00006218a6eb536c in vPortCancelThread (pxTaskToDelete=0x6218a6f1f320 <xTimerTaskTCB.0>) at /data/code/FreeRTOS/FreeRTOS/Source/portable/ThirdParty/GCC/Posix/port.c:445
#6 0x00006218a6eb13d7 in prvDeleteTCB (pxTCB=0x6218a6f1f320 <xTimerTaskTCB.0>) at /data/code/FreeRTOS/FreeRTOS/Source/tasks.c:6432
#7 0x00006218a6eade64 in vTaskDelete (xTaskToDelete=0x6218a6f1f320 <xTimerTaskTCB.0>) at /data/code/FreeRTOS/FreeRTOS/Source/tasks.c:2319
#8 0x00006218a6eaf0aa in vTaskEndScheduler () at /data/code/FreeRTOS/FreeRTOS/Source/tasks.c:3778
#9 0x00006218a6e90abc in prvQueueSendTask (pvParameters=0x0) at /data/code/FreeRTOS/FreeRTOS/Demo/Posix_GCC/main_blinky.c:210
#10 0x00006218a6eb53f1 in prvWaitForStart (pvParams=0x719b4ba7cfe8) at /data/code/FreeRTOS/FreeRTOS/Source/portable/ThirdParty/GCC/Posix/port.c:465
#11 0x0000719b4b8a1e2e in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447
#12 0x0000719b4b933a4c in __GI___clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
(gdb) fr 3
#3 ___pthread_mutex_lock (mutex=0x6218c9f76fa0) at ./nptl/pthread_mutex_lock.c:93
warning: 93 ./nptl/pthread_mutex_lock.c: Nie ma takiego pliku ani katalogu
(gdb) p mutex.__data
$1 = {__lock = 2, __count = 0, __owner = 35558, __nusers = 1, __kind = 0, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next = 0x0}}
(gdb)
To summarize: task TX waits on mutex. Its owner is task 35558 which no longer exists. It was Tmr Svc task. To add - Tmr Svc task is first task deleted after calling vTaskEndScheduler(). With vTaskSuspendAll() before vTaskEndScheduler() app still hangs.
Problem occurs on current master (2dcc47ecb) and 202406.01 LTS.
I wonder it I’m using vTaskEndScheduler incorrectly or there some issue with that port.