revi-archive/xz-archive
1
0
Fork 0
mirror of https://git.tukaani.org/xz.git synced 2024-04-04 12:36:23 +02:00
Code Activity

xz: Improve handling of failed realloc in xrealloc.

Browse source 
Thanks to Jim Meyering.
This commit is contained in:
Lasse Collin 2012-09-28 20:11:09 +03:00
parent ab22562066
commit 3d93b63549
1 changed files with 12 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
src/xz/util.c
View file

@ -26,9 +26,19 @@ xrealloc(void *ptr, size_t size)
{
assert(size > 0);
// Save ptr so that we can free it if realloc fails.
// The point is that message_fatal ends up calling stdio functions
// which in some libc implementations might allocate memory from
// the heap. Freeing ptr improves the chances that there's free
// memory for stdio functions if they need it.
void *p = ptr;
ptr = realloc(ptr, size);
if (ptr == NULL)
message_fatal("%s", strerror(errno));
if (ptr == NULL) {
const int saved_errno = errno;
free(p);
message_fatal("%s", strerror(saved_errno));
}
return ptr;
}