trace-pc-guard code example

Example: "-fsanitize-coverage=trace-pc" clang

#include <stdio.h>
 
#define notrace __attribute__((no_instrument_function))
#define _RET_IP_    (unsigned long)__builtin_return_address(0)
 
void notrace __sanitizer_cov_trace_pc(void)
{
    //printf("code instrumented...\n");
    printf("return pc [0x%x]\n", _RET_IP_);
}