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memory: Add pasing of VmFlags

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The kernel now supports providing VMA flags via smaps
interface so add pasting of them.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Cyrill Gorcunov
2012-10-26 00:16:05 +04:00
committed by Pavel Emelyanov
parent a343afad34
commit cc6af3898e
2 changed files with 61 additions and 0 deletions
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58
proc_parse.c
View File

@@ -49,6 +49,59 @@ static bool is_vma_range_fmt(char *line)
return true; return true;
} }
static int parse_vmflags(char *buf, struct vma_area *vma_area)
{
char *tok;
if (!buf[0])
return 0;
tok = strtok(buf, " \n");
if (!tok)
return 0;
#define _vmflag_match(_t, _s) (_t[0] == _s[0] && _t[1] == _s[1])
do {
/* mmap() block */
if (_vmflag_match(tok, "gd"))
vma_area->vma.flags |= MAP_GROWSDOWN;
else if (_vmflag_match(tok, "lo"))
vma_area->vma.flags |= MAP_LOCKED;
else if (_vmflag_match(tok, "nr"))
vma_area->vma.flags |= MAP_NORESERVE;
else if (_vmflag_match(tok, "ht"))
vma_area->vma.flags |= MAP_HUGETLB;
/* madvise() block */
if (_vmflag_match(tok, "sr"))
vma_area->vma.madv |= (1ul << MADV_SEQUENTIAL);
else if (_vmflag_match(tok, "rr"))
vma_area->vma.madv |= (1ul << MADV_RANDOM);
else if (_vmflag_match(tok, "dc"))
vma_area->vma.madv |= (1ul << MADV_DONTFORK);
else if (_vmflag_match(tok, "dd"))
vma_area->vma.madv |= (1ul << MADV_DONTDUMP);
else if (_vmflag_match(tok, "mg"))
vma_area->vma.madv |= (1ul << MADV_MERGEABLE);
else if (_vmflag_match(tok, "hg"))
vma_area->vma.madv |= (1ul << MADV_HUGEPAGE);
else if (_vmflag_match(tok, "nh"))
vma_area->vma.madv |= (1ul << MADV_NOHUGEPAGE);
/*
* Anything else is just ignored.
*/
} while ((tok = strtok(NULL, " \n")));
#undef _vmflag_match
if (vma_area->vma.madv)
vma_area->vma.has_madv = true;
return 0;
}
int parse_smaps(pid_t pid, struct list_head *vma_area_list, bool use_map_files) int parse_smaps(pid_t pid, struct list_head *vma_area_list, bool use_map_files)
{ {
struct vma_area *vma_area = NULL; struct vma_area *vma_area = NULL;
@@ -86,6 +139,11 @@ int parse_smaps(pid_t pid, struct list_head *vma_area_list, bool use_map_files)
*/ */
vma_area = NULL; vma_area = NULL;
goto err; goto err;
} else if (!strncmp(buf, "VmFlags: ", 9)) {
BUG_ON(!vma_area);
if (parse_vmflags(&buf[9], vma_area))
goto err;
continue;
} else } else
continue; continue;
} }

3
protobuf/vma.proto
View File

@@ -10,4 +10,7 @@ message vma_entry {
// while switching from execve restore model. It is // while switching from execve restore model. It is
// -1 by default. // -1 by default.
required sint64 fd = 8; required sint64 fd = 8;
/* madvise flags bitmap */
optional uint64 madv = 9;
} }