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* locale/programs/locarchive.c (create_archive): Add MAP_PRIVATE

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to MAP_ANON in PROT_NONE mmap64 call.
	(open_archive): Likewise.
	(file_data_available_p): Use mmap64 instead of mremap.
	(enlarge_archive): Likewise.  Update head if ah->addr changed.
	Attempt to reserve address space after mmap64 region.
This commit is contained in:
Ulrich Drepper 2009-04-27 14:07:57 +00:00
parent f0e3c47fd6
commit 6284c9f61e
2 changed files with 41 additions and 11 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2009-04-27 Jakub Jelinek <jakub@redhat.com>
* locale/programs/locarchive.c (create_archive): Add MAP_PRIVATE
to MAP_ANON in PROT_NONE mmap64 call.
(open_archive): Likewise.
(file_data_available_p): Use mmap64 instead of mremap.
(enlarge_archive): Likewise. Update head if ah->addr changed.
Attempt to reserve address space after mmap64 region.
2009-04-26 Ulrich Drepper <drepper@redhat.com>
* sysdeps/ieee754/dbl-64/s_expm1.c: Set errno for overflow.

43
locale/programs/locarchive.c
View File

@ -134,8 +134,8 @@ create_archive (const char *archivefname, struct locarhandle *ah)
size_t reserved = RESERVE_MMAP_SIZE;
int xflags = 0;
if (total < reserved
&& ((p = mmap64 (NULL, reserved, PROT_NONE, MAP_ANON, -1, 0))
!= MAP_FAILED))
&& ((p = mmap64 (NULL, reserved, PROT_NONE, MAP_PRIVATE | MAP_ANON,
-1, 0)) != MAP_FAILED))
xflags = MAP_FIXED;
else
{
@ -259,10 +259,16 @@ file_data_available_p (struct locarhandle *ah, uint32_t offset, uint32_t size)
if (st.st_size > ah->reserved)
return false;
void *p = mremap (ah->addr, ah->mmaped, st.st_size,
MREMAP_FIXED | MREMAP_MAYMOVE, ah->addr);
const size_t pagesz = getpagesize ();
size_t start = ah->mmaped & ~(pagesz - 1);
void *p = mmap64 (ah->addr + start, st.st_size - start,
PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED,
ah->fd, start);
if (p == MAP_FAILED)
return false;
{
ah->mmaped = start;
return false;
}
ah->mmaped = st.st_size;
return true;
@ -312,14 +318,15 @@ enlarge_archive (struct locarhandle *ah, const struct locarhead *head)
error (EXIT_FAILURE, errno, _("cannot map locale archive file"));
if (st.st_size < ah->reserved)
ah->addr = mremap (ah->addr, ah->mmaped, st.st_size,
MREMAP_MAYMOVE | MREMAP_FIXED, ah->addr);
ah->addr = mmap64 (ah->addr, st.st_size, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_FIXED, ah->fd, 0);
else
{
munmap (ah->addr, ah->reserved);
ah->addr = mmap64 (NULL, st.st_size, PROT_READ | PROT_WRITE,
MAP_SHARED, ah->fd, 0);
ah->reserved = st.st_size;
head = ah->addr;
}
if (ah->addr == MAP_FAILED)
goto enomap;
@ -384,8 +391,22 @@ enlarge_archive (struct locarhandle *ah, const struct locarhead *head)
error (EXIT_FAILURE, errval, _("cannot resize archive file"));
}
/* To prepare for enlargements of the mmaped area reserve some
address space. */
size_t reserved = RESERVE_MMAP_SIZE;
int xflags = 0;
if (total < reserved
&& ((p = mmap64 (NULL, reserved, PROT_NONE, MAP_PRIVATE | MAP_ANON,
-1, 0)) != MAP_FAILED))
xflags = MAP_FIXED;
else
{
p = NULL;
reserved = total;
}
/* Map the header and all the administration data structures. */
p = mmap64 (NULL, total, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
p = mmap64 (p, total, PROT_READ | PROT_WRITE, MAP_SHARED | xflags, fd, 0);
if (p == MAP_FAILED)
{
int errval = errno;
@ -404,7 +425,7 @@ enlarge_archive (struct locarhandle *ah, const struct locarhead *head)
new_ah.mmaped = total;
new_ah.addr = p;
new_ah.fd = fd;
new_ah.reserved = total;
new_ah.reserved = reserved;
/* Walk through the hash name hash table to find out what data is
still referenced and transfer it into the new file. */
@ -593,8 +614,8 @@ open_archive (struct locarhandle *ah, bool readonly)
int xflags = 0;
void *p;
if (st.st_size < reserved
&& ((p = mmap64 (NULL, RESERVE_MMAP_SIZE, PROT_NONE, MAP_ANON, -1, 0))
!= MAP_FAILED))
&& ((p = mmap64 (NULL, reserved, PROT_NONE, MAP_PRIVATE | MAP_ANON,
-1, 0)) != MAP_FAILED))
xflags = MAP_FIXED;
else
{