URL:
<http://savannah.nongnu.org/bugs/?40535>
Summary: realloc(xxx, 0) doesn't free
Project: AVR C Runtime Library
Submitted by: glglgl
Submitted on: So 10 Nov 2013 11:11:09 GMT
Category: Library
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: libc code
Status: None
Percent Complete: 0%
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 1.8.0
Fixed Release: None
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Details:
realloc(xxx, 0) is supposed to free the given memory block if xxx is not NULL,
If xxx is NULL, realloc() is supposed to work like malloc().
So I suggest to modify
http://svn.sv.gnu.org/viewvc/trunk/avr-libc/libc/stdlib/realloc.c?revision=2127&root=avr-libc&view=markup
in that way to add after
/* Trivial case, required by C standard. */
if (ptr == 0)
return malloc(len);
the lines
/* Another trivial case, required by C standard. */
if (len == 0) {
free(ptr);
return NULL;
}
because in this case
* realloc(NULL, 0) returns the same as malloc(0)
* realloc(anythingelse, 0) does free(anythingelse).
This behaviour is required by the standard.
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