On Thu, 2015-05-07 at 17:05 +0300, Alexey Kodanev wrote:
> On 05/06/2015 01:18 PM, Wei,Jiangang wrote:
> > Including memory and fd leak.
> >
> > Signed-off-by: Wei,Jiangang <weijg.f...@cn.fujitsu.com>
> > ---
> > testcases/kernel/mem/mmapstress/mmapstress01.c | 7 +++++++
> > 1 file changed, 7 insertions(+)
> >
> > diff --git a/testcases/kernel/mem/mmapstress/mmapstress01.c
> > b/testcases/kernel/mem/mmapstress/mmapstress01.c
> > index 0baf0e2..1db8147 100644
> > --- a/testcases/kernel/mem/mmapstress/mmapstress01.c
> > +++ b/testcases/kernel/mem/mmapstress/mmapstress01.c
> > @@ -657,6 +657,8 @@ int fileokay(char *file, uchar_t * expbuf)
> > perror("read error");
> > /***** LTP Port *****/
> > local_flag = FAILED;
> > + free(readbuf);
>
> We could allocate readbuf on the stack... readbuf[pagesize] so free()
> not needed.
Thanks for your comments.
Yes, That's right.
I accept it.
>
> > + close(fd);
> > anyfail();
>
> anyfail() calls tst_brkm() - the program terminates and closes fd.
>
> > /***** ** *****/
> > return 0;
> > @@ -668,6 +670,8 @@ int fileokay(char *file, uchar_t * expbuf)
> > (void)fprintf(stderr, "read %d of %ld bytes\n",
> > (i * pagesize) + cnt,
> > (long)mapsize);
> > + free(readbuf);
> > + close(fd);
> > return 0;
> > }
> > }
> > @@ -688,10 +692,13 @@ int fileokay(char *file, uchar_t * expbuf)
> > "(fsize %ld)\n", i, j,
> > statbuf.st_size);
> > #endif /* LARGE_FILE */
> > + free(readbuf);
> > + close(fd);
> > return 0;
>
> In both above cases it'll call anyfail() after checking fileokay()'s
> return value.
> If it seems not obvious we can close 'fd' here and it'd be better to use
> SAFE_CLOSE() macro from safe_macros.h.
There's no cleanup function for SAFE_CLOSE().
so,
close() is the same as SAFE_CLOSE(NULL, fd).
And close(fd) had been used at mmapstress01.c.
if i adopt SAFE_CLOSE(NULL, fd),
It looks a bit odd...
Thanks,
Wei
>
> > }
> > }
> > }
> > + free(readbuf);
> > close(fd);
> >
> > return 1;
>
> Thanks,
> Alexey
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