malloc(), realloc().. the dark side powerful it is

Projects Programming
28

Right then.

Since I don't know how to fix the precompiled libraries, I've simply made my own versions of malloc/free/realloc from the avr-libc-1.7.1 source.

This can be downloaded from:

http://gammon.com.au/Arduino/mymalloc.c

Just incorporate that into your project (make a new tab in the IDE called mymalloc.c - NOT .cpp) and paste the file into it.

Then, add this to the start of your project:

extern "C" {
  void * mymalloc(size_t len);
  void myfree(void *p);
  void * myrealloc(void *ptr, size_t len);
}

Now change (or #define) malloc to mymalloc and so on. Then the test runs with everything going back to normal at the end.

Possibly all that needs changing is free, since I think that is the thing with the bug.

A caveat is that things like the String library will probably still pull in the old malloc/free. There is probably a smarter way of achieving this.