device malloc_zone_malloc hook

[one2zero]

I am trying to hook “malloc_zone_malloc”，it works well with iOS Simulator ，but useless on an
iOS device。what else should i do？

void my_malloc_zone_malloc(malloc_zone_t *zone, size_t size){
printf("Calling real malloc( %zu)\n", size);

 return orig_malloc_zone_malloc(zone, size);

}

void my_malloc_zone_free(malloc_zone_t *zone, void *ptr){
printf("Calling real free( %zu)\n",malloc_size(ptr));

return orig_malloc_zone_free(zone, ptr);

}

int main(int argc, char * argv[])
{
@autoreleasepool {
rebind_symbols((struct rebinding[2]){{"malloc_zone_malloc", my_malloc_zone_malloc,(void*)&orig_malloc_zone_malloc}, {"malloc_zone_free", my_malloc_zone_free,(void*)&orig_malloc_zone_free}}, 2);

    // Open our own binary and print out first 4 bytes (which is the same
    // for all Mach-O binaries on a given architecture)
    int fd = open(argv[0], O_RDONLY);
    uint32_t magic_number = 0;
    read(fd, &magic_number, 4);
    printf("Mach-O Magic Number: %x \n", magic_number);
    close(fd);
    
    return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));  
}  

}