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authorUlrich Drepper <drepper@redhat.com>2009-04-24 18:47:19 +0000
committerUlrich Drepper <drepper@redhat.com>2009-04-24 18:47:19 +0000
commitc9edc8891dac165b8446cdd11db4304f9faf01d8 (patch)
tree261ff4a90cd7ed147cab0766fab92d2a3db7b710 /locale/programs/locarchive.c
parentc2d5bd5b00cfbb0ef192821f2d724fb6448d59e3 (diff)
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* locale/programs/locarchive.c (enlarge_archive): Conserve address
space when temporarily mapping the whole content of the old file.
Diffstat (limited to 'locale/programs/locarchive.c')
-rw-r--r--locale/programs/locarchive.c29
1 files changed, 20 insertions, 9 deletions
diff --git a/locale/programs/locarchive.c b/locale/programs/locarchive.c
index 66c5d39..e1e0423 100644
--- a/locale/programs/locarchive.c
+++ b/locale/programs/locarchive.c
@@ -133,14 +133,14 @@ create_archive (const char *archivefname, struct locarhandle *ah)
address space. */
size_t reserved = RESERVE_MMAP_SIZE;
int xflags = 0;
- if (total < RESERVE_MMAP_SIZE
+ if (total < reserved
&& ((p = mmap64 (NULL, reserved, PROT_NONE, MAP_ANON, -1, 0))
!= MAP_FAILED))
xflags = MAP_FIXED;
else
{
p = NULL;
- reserved = 0;
+ reserved = total;
}
/* Map the header and all the administration data structures. */
@@ -307,11 +307,22 @@ enlarge_archive (struct locarhandle *ah, const struct locarhead *head)
/* Not all of the old file has to be mapped. Change this now this
we will have to access the whole content. */
- if (fstat64 (ah->fd, &st) != 0
- || (st.st_size > ah->mmaped
- && (ah->addr = mmap64 (NULL, st.st_size, PROT_READ | PROT_WRITE,
- MAP_SHARED, ah->fd, 0)) == MAP_FAILED))
+ if (fstat64 (ah->fd, &st) != 0)
+ enomap:
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);
+ 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;
+ }
+ if (ah->addr == MAP_FAILED)
+ goto enomap;
ah->mmaped = st.st_size;
/* Create a temporary file in the correct directory. */
@@ -581,14 +592,14 @@ open_archive (struct locarhandle *ah, bool readonly)
size_t reserved = RESERVE_MMAP_SIZE;
int xflags = 0;
void *p;
- if (st.st_size < RESERVE_MMAP_SIZE
+ if (st.st_size < reserved
&& ((p = mmap64 (NULL, RESERVE_MMAP_SIZE, PROT_NONE, MAP_ANON, -1, 0))
!= MAP_FAILED))
xflags = MAP_FIXED;
else
{
p = NULL;
- reserved = 0;
+ reserved = st.st_size;
}
/* Map the entire file. We might need to compare the category data
@@ -609,7 +620,7 @@ close_archive (struct locarhandle *ah)
{
if (ah->fd != -1)
{
- munmap (ah->addr, MAX (ah->reserved, ah->mmaped));
+ munmap (ah->addr, ah->reserved);
close (ah->fd);
}
}