According to the OpenGroup standard
(here<http://pubs.opengroup.org/onlinepubs/009695399/functions/free.html>), and
in Linux (here<http://linux.die.net/man/3/malloc>), free should ignore a NULL
pointer. "If ptr is a null pointer, no action shall occur." Even the header for
free() in StdLib's implementation has this line.
However, the implementation in Malloc.c has:
void
free(void *Ptr)
{
(void) gBS->FreePool (Ptr);
}
However, FreePool does not have this behavior guarantee (thus the various
"safe" FreePool functions in libraries).
if (Ptr != NULL) {
(void) gBS->FreePool (Ptr);
}
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