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perf tools: Fix find tids routine by excluding "." and ".." 

Introduce a filter function to skip "." and ".." directories when calculating
tid number, otherwise tid 0 will be included in the all_tid result array.

Cc: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <4C185F68.1020505@cn.fujitsu.com>
Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Gui Jianfeng 2010-06-16 13:21:44 +08:00 committed by Arnaldo Carvalho de Melo
parent a1e80fafc9
commit c214909b36
1 changed files with 10 additions and 1 deletions
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11
tools/perf/util/thread.c
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@ -7,6 +7,15 @@
#include "util.h"
#include "debug.h"
/* Skip "." and ".." directories */
static int filter(const struct dirent *dir)
{
if (dir->d_name[0] == '.')
return 0;
else
return 1;
}
int find_all_tid(int pid, pid_t ** all_tid)
{
char name[256];
@ -16,7 +25,7 @@ int find_all_tid(int pid, pid_t ** all_tid)
int i;
sprintf(name, "/proc/%d/task", pid);
items = scandir(name, &namelist, NULL, NULL);
items = scandir(name, &namelist, filter, NULL);
if (items <= 0)
return -ENOENT;
*all_tid = malloc(sizeof(pid_t) * items);