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Add instruction to suppress SIGUSR1 in Posix with LLDB debugger (#1245)

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While using the macOS default LLDB debugger, a call to vTaskEndScheduler results in an unhandled SIGUSR1 (aka SIGRESUME) when restoring the scheduler thread's signals with pthread_sigmask. This crashes the program.

Added instructions in portable/ThirdParty/GCC/Posix/port.c to suppress SIGUSR1 to prevent LLDB debugger interference when exiting xPortStartScheduler

Thanks to: @johnboiles for pointing it out in #1224
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Bhoomika R S 2025-02-12 14:57:03 +05:30 committed by GitHub
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portable/ThirdParty/GCC/Posix/port.c vendored
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@ -48,6 +48,11 @@
* stdio (printf() and friends) should be called from a single task * stdio (printf() and friends) should be called from a single task
* only or serialized with a FreeRTOS primitive such as a binary * only or serialized with a FreeRTOS primitive such as a binary
* semaphore or mutex. * semaphore or mutex.
*
* Note: When using LLDB (the default debugger on macOS) with this port,
* suppress SIGUSR1 to prevent debugger interference. This can be
* done by adding the following line to ~/.lldbinit:
* `process handle SIGUSR1 -n true -p true -s false`
*----------------------------------------------------------*/ *----------------------------------------------------------*/
#ifdef __linux__ #ifdef __linux__
#define _GNU_SOURCE #define _GNU_SOURCE