lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-30 22:43:12 +03:00
Code Activity

Refactor several debug routines.

Browse Source 
To simplify additions of debug routines we replace a custom function
implementation by a simple call.
This commit is contained in:
Ondřej Bílka
2013-12-04 02:02:25 +01:00
parent 6905a19f7a
commit d674f0ef38
7 changed files with 16 additions and 288 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
debug/memmove_chk.c
View File

@ -36,66 +36,5 @@ MEMMOVE_CHK (dest, src, len, destlen)
if (__builtin_expect (destlen < len, 0))
__chk_fail ();
unsigned long int dstp = (long int) dest;
unsigned long int srcp = (long int) src;
/* This test makes the forward copying code be used whenever possible.
Reduces the working set. */
if (dstp - srcp >= len) /* *Unsigned* compare! */
{
/* Copy from the beginning to the end. */
/* If there not too few bytes to copy, use word copy. */
if (len >= OP_T_THRES)
{
/* Copy just a few bytes to make DSTP aligned. */
len -= (-dstp) % OPSIZ;
BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);
/* Copy whole pages from SRCP to DSTP by virtual address
manipulation, as much as possible. */
PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);
/* Copy from SRCP to DSTP taking advantage of the known
alignment of DSTP. Number of bytes remaining is put
in the third argument, i.e. in LEN. This number may
vary from machine to machine. */
WORD_COPY_FWD (dstp, srcp, len, len);
/* Fall out and copy the tail. */
}
/* There are just a few bytes to copy. Use byte memory operations. */
BYTE_COPY_FWD (dstp, srcp, len);
}
else
{
/* Copy from the end to the beginning. */
srcp += len;
dstp += len;
/* If there not too few bytes to copy, use word copy. */
if (len >= OP_T_THRES)
{
/* Copy just a few bytes to make DSTP aligned. */
len -= dstp % OPSIZ;
BYTE_COPY_BWD (dstp, srcp, dstp % OPSIZ);
/* Copy from SRCP to DSTP taking advantage of the known
alignment of DSTP. Number of bytes remaining is put
in the third argument, i.e. in LEN. This number may
vary from machine to machine. */
WORD_COPY_BWD (dstp, srcp, len, len);
/* Fall out and copy the tail. */
}
/* There are just a few bytes to copy. Use byte memory operations. */
BYTE_COPY_BWD (dstp, srcp, len);
}
return dest;
return memmove (dest, src, len);
}