Adding volatile to tasks.c's runtime information to protect against compiler optimization (#62)
As discussed in https://forums.freertos.org/t/make-runtime-stats-working-with-compiler-optimization-enabled/9846 and on lined out on https://blog.the78mole.de/freertos-debugging-on-stm32-cpu-usage/, adding the volatile prevents the run-time stats variable being optimized away when used with compiler optimizations.
diff --git a/tasks.c b/tasks.c
index d63f6cc..c057973 100644
--- a/tasks.c
+++ b/tasks.c
@@ -393,7 +393,7 @@
/* Do not move these variables to function scope as doing so prevents the
code working with debuggers that need to remove the static qualifier. */
PRIVILEGED_DATA static uint32_t ulTaskSwitchedInTime = 0UL; /*< Holds the value of a timer/counter the last time a task was switched in. */
- PRIVILEGED_DATA static uint32_t ulTotalRunTime = 0UL; /*< Holds the total amount of execution time as defined by the run time counter clock. */
+ PRIVILEGED_DATA static volatile uint32_t ulTotalRunTime = 0UL; /*< Holds the total amount of execution time as defined by the run time counter clock. */
#endif
