mir/criu
2
0
Fork 0
mirror of https://github.com/checkpoint-restore/criu synced 2025-08-31 14:25:49 +00:00
Code Issues Releases Wiki Activity

crtools: use mremap for remaping shared memory

Browse Source 
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Andrey Vagin
2012-03-17 11:47:00 +04:00
committed by Pavel Emelyanov
parent caf860c2ef
commit 0ce623f9f7
1 changed files with 6 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
cr-restore.c
View File

@@ -342,29 +342,16 @@ static int prepare_pipes_pid(int pid)
static int shmem_remap(void *old_addr, void *new_addr, unsigned long size)
{
char path[PATH_MAX];
int fd, ret = -1;
void *ret;
sprintf(path, "/proc/self/map_files/%lx-%lx",
(long)old_addr, (long)old_addr + size);
fd = open(path, O_RDWR);
if (fd < 0) {
pr_perror("open(%s) failed", path);
ret = mremap(old_addr, size, size,
MREMAP_FIXED | MREMAP_MAYMOVE, new_addr);
if (new_addr != ret) {
pr_perror("mremap failed");
return -1;
}
/* reuse old_addr variable */
old_addr = mmap(new_addr, size, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_FIXED, fd, 0);
if (new_addr == old_addr)
ret = 0;
else
pr_perror("mmap failed");
close(fd);
return ret;
return 0;
}
static int prepare_shared(int ps_fd)