tracing_malloc_free_govnocodely.c

#include <stdio.h>
#include <stdlib.h>

#define TO_STRING1(X) #X
#define TO_STRING(X) TO_STRING1(X)
#define LINE TO_STRING(__LINE__)
#define malloc(N) log_p(malloc(log_s(N, "CALLING MALLOC @ " \
                  LINE)), "CALLED MALLOC @ " LINE)
#define free(p) free(log_p(p, "FREE @ " LINE))

size_t log_s(size_t N, const char * context) {
  printf("### %s (%d)\n", context, N);
  return N;
}

void* log_p(void* p, const char * context) {
  printf("### %s (%p)\n", context, p);
  return p;
}

int main(void) {
	printf("hello!\n");
	char* m = malloc(10);
	printf("allocated: %p\n", m);
	m[0] = 'a';
	m[1] = 0;
	printf("m='%s'\n", m);
	if(m != NULL) free(m);
	printf("freed: %p\n", m);
	return 0;
}

Результат исполнения:

hello!
### CALLING MALLOC @ 23 (10)
### CALLED MALLOC @ 23 (0x2b097047f020)
allocated: 0x2b097047f020
m='a'
### FREE @ 28 (0x2b097047f020)
freed: 0x2b097047f020