Tim,
Thank you for bringing this deficiency to our attention.
A fix for this has been checked in to the EDK II source tree on
www.tianocore.org<http://www.tianocore.org>.
Daryl McDaniel
"Software is like entropy.
It is difficult to grasp, weighs nothing, and obeys the second law of
thermodynamics;
i.e. it always increases."
-- Norman R. Augustine
________________________________
From: Tim Lewis [mailto:[email protected]]
Sent: Saturday, September 22, 2012 2:27 PM
To: [email protected]
Subject: [edk2] free() behavior for NULL pointers.
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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