espressif/esp-idf
1
0
Fork 1
mirror of https://github.com/espressif/esp-idf.git synced 2025-07-30 10:47:19 +02:00
Code Issues Packages Projects Releases Wiki Activity

fix(freertos/idf): Add missing critical sections to vTaskSuspendAll()

Browse Source 
vTaskSuspendAll() requires critical sections when building for SMP. Otherwise,
it is possible for a task to switch cores in between getting the core ID and
before incremented uxSchedulerSuspended.
This commit is contained in:
Darian Leung
2024-05-14 22:32:25 +08:00
parent ea010f84ef
commit 0dc29caf4a
1 changed files with 18 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
components/freertos/FreeRTOS-Kernel/tasks.c
View File

@ -2462,11 +2462,15 @@ void vTaskEndScheduler( void )
void vTaskSuspendAll( void )
{
/* A critical section is not required as the variable is of type
/* For SMP, we need to take the kernel lock here as we are about to access
* kernel data structures.
*
* For single-core, a critical section is not required as the variable is of type
* BaseType_t. Please read Richard Barry's reply in the following link to a
* post in the FreeRTOS support forum before reporting this as a bug! -
* https://goo.gl/wu4acr */
prvENTER_CRITICAL_SMP_ONLY( &xKernelLock );
{
/* portSOFTWARE_BARRIER() is only implemented for emulated/simulated ports that
* do not otherwise exhibit real time behaviour. */
portSOFTWARE_BARRIER();
@ -2479,6 +2483,9 @@ void vTaskSuspendAll( void )
* the above increment elsewhere. */
portMEMORY_BARRIER();
}
/* Release the previously taken kernel lock. */
prvEXIT_CRITICAL_SMP_ONLY( &xKernelLock );
}
/*----------------------------------------------------------*/
#if ( configUSE_TICKLESS_IDLE != 0 )