The compiler flag -finstrument-functions should be passed to activate tracing
functionality.
Add the following line to your CMake file:
target_compile_options(${your-target} PRIVATE -finstrument-functions)
or CFLAGS += -finstrument-functions in case of Makefile.
The default number of tracing slots is 128 which can hold up to 128 function
calls. The maximum number of slots can be changed by TRACE_MAXLEN define.
To get timestamp, uint32_t trace_get_time(void) should be implemented.
Otherwise timestamp will always be 0.
To get stack usage, size_t trace_stack_watermark(void) should be implemented.
Otherwise stack usage will always be 0.
To get the TID, void *trace_get_current_thread(void) should be implemented.
Otherwise TID will always be NULL.
LIBMCU_NO_INSTRUMENT should be put to prevent infinite recursion when you
implement your own ones:
LIBMCU_NO_INSTRUMENT
uint32_t trace_get_time(void) {
return (uint32_t)xTaskGetTickCount();
}The below functions will be called every function calls. Those functions can be overridden by creating another functions with the same declaration.
void trace_enter_hook(const struct trace *entry)void trace_leave_hook(const struct trace *entry)