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Memory tracing

Mbed OS provides a set of functions that you can use to study the runtime memory allocation pattern of your software: which sections of the code allocate and free memory and how much memory they need.

You must define the MBED_MEM_TRACING_ENABLED macro to enable memory tracing.

You can use the mbed_mem_trace_set_callback API to set the callback for memory tracing. The callback is invoked every time you call standard allocation functions, such as malloc, realloc, calloc and free.

For a step-by-step guide about how to use optimize memory using runtime memory tracing, please see our runtime memory tracing tutorial.

Memory tracing function reference

Memory tracing example

#include <stdlib.h>
#include "mbed.h"
#include "mbed_mem_trace.h"


int main() {
    mbed_mem_trace_set_callback(mbed_mem_trace_default_callback);
    while (true) {
        void *p = malloc(50);
        wait(0.5);
        free(p);
    }
}

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