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valgrind

brew install valgrind

valgrind --leak-check=yes myprog arg1 arg2
valgrind --leak-check=full --show-leak-kinds=all --verbose --track-origins=yes myprog
int run_within_valgrind (void) {
char *p = getenv ("LD_PRELOAD");
if (p == NULL)
return 0;
return (strstr (p, "/valgrind/") != NULL || strstr (p, "/vgpreload") != NULL);
}

FAQ

Uninitialised value was created by a stack allocation

Conditional jump or move depends on uninitialised value(s)

Invalid read of size, Invalid write of size