On Fri, Oct 10, 2008 at 9:57 AM, CAI Qian <[EMAIL PROTECTED]> wrote:
> Hi,
>
> This patch adds some debug messages when shmat(2) failed, so we could tell
> if the failure was
> because the requested address space has been used. In addition, it fixes
> the output of failed
> error code to a more meaningful form. The sample output is,
Thanks. I will look in to this and test out.
Regards--
Subrata
>
>
> ./shmem_test_06: IPC Shared Memory TestSuite program
>
> mykey to uniquely identify the shared memory segment 0x330f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
>
> Shared memory segment address : 0x20000000
>
> Index through shared memory segment ...
>
> mykey to uniquely identify the shared memory segment 0x340f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
>
> Shared memory segment address : 0x30000000
>
> Index through shared memory segment ...
>
> mykey to uniquely identify the shared memory segment 0x350f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
>
> Shared memory segment address : 0x48000000
>
> Index through shared memory segment ...
>
> mykey to uniquely identify the shared memory segment 0x360f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
>
> Shared memory segment address : 0x50000000
>
> Index through shared memory segment ...
>
> mykey to uniquely identify the shared memory segment 0x370f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
>
> Shared memory segment address : 0x60000000
>
> Index through shared memory segment ...
>
> mykey to uniquely identify the shared memory segment 0x380f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
>
> Shared memory segment address : 0x70000000
>
> Index through shared memory segment ...
>
> mykey to uniquely identify the shared memory segment 0x390f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
>
> Shared memory segment address : 0x80000000
>
> Index through shared memory segment ...
>
> mykey to uniquely identify the shared memory segment 0x410f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
>
> Shared memory segment address : 0x90000000
>
> Index through shared memory segment ...
>
> mykey to uniquely identify the shared memory segment 0x420f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
>
> Shared memory segment address : 0xa0000000
>
> Index through shared memory segment ...
>
> mykey to uniquely identify the shared memory segment 0x430f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
>
> Shared memory segment address : 0xb0000000
>
> Index through shared memory segment ...
>
> mykey to uniquely identify the shared memory segment 0x450f017c
>
> Get shared memory segment (1048576 bytes)
>
> Attach shared memory segment to process
> heap 0x2428000
> 00400000-00402000 r-xp 00000000 08:13 258511
> /home/qcai/buffer/ltp/testcases/kernel/ipc/ipc_stress/shmem_test_06
> 00601000-00602000 rw-p 00001000 08:13 258511
> /home/qcai/buffer/ltp/testcases/kernel/ipc/ipc_stress/shmem_test_06
> 20000000-20100000 rw-s 00000000 00:08 51445777
> /SYSV330f017c (deleted)
> 30000000-30100000 rw-s 00000000 00:08 51478546
> /SYSV340f017c (deleted)
> 48000000-48100000 rw-s 00000000 00:08 51511316
> /SYSV350f017c (deleted)
> 50000000-50100000 rw-s 00000000 00:08 51544087
> /SYSV360f017c (deleted)
> 60000000-60100000 rw-s 00000000 00:08 51576856
> /SYSV370f017c (deleted)
> 70000000-70100000 rw-s 00000000 00:08 51609625
> /SYSV380f017c (deleted)
> 80000000-80100000 rw-s 00000000 00:08 51642394
> /SYSV390f017c (deleted)
> 90000000-90100000 rw-s 00000000 00:08 51675163
> /SYSV410f017c (deleted)
> a0000000-a0100000 rw-s 00000000 00:08 51707932
> /SYSV420f017c (deleted)
> b0000000-b0100000 rw-s 00000000 00:08 51740701
> /SYSV430f017c (deleted)
> 3e18200000-3e18220000 r-xp 00000000 08:11 61856
> /lib64/ld-2.8.90.so
> 3e1841f000-3e18420000 r--p 0001f000 08:11 61856
> /lib64/ld-2.8.90.so
> 3e18420000-3e18421000 rw-p 00020000 08:11 61856
> /lib64/ld-2.8.90.so
> 3e19600000-3e1976c000 r-xp 00000000 08:11 61857
> /lib64/libc-2.8.90.so
> 3e1976c000-3e1996c000 ---p 0016c000 08:11 61857
> /lib64/libc-2.8.90.so
> 3e1996c000-3e19970000 r--p 0016c000 08:11 61857
> /lib64/libc-2.8.90.so
> 3e19970000-3e19971000 rw-p 00170000 08:11 61857
> /lib64/libc-2.8.90.so
> 3e19971000-3e19976000 rw-p 3e19971000 00:00 0
> 3e1a200000-3e1a217000 r-xp 00000000 08:11 61865
> /lib64/libpthread-2.8.90.so
> 3e1a217000-3e1a416000 ---p 00017000 08:11 61865
> /lib64/libpthread-2.8.90.so
> 3e1a416000-3e1a417000 r--p 00016000 08:11 61865
> /lib64/libpthread-2.8.90.so
> 3e1a417000-3e1a418000 rw-p 00017000 08:11 61865
> /lib64/libpthread-2.8.90.so
> 3e1a418000-3e1a41c000 rw-p 3e1a418000 00:00 0
> 7fa1d2e5a000-7fa1d2e5c000 rw-p 7fa1d2e5a000 00:00 0
> 7fa1d2e6c000-7fa1d2e6f000 rw-p 7fa1d2e6c000 00:00 0
> 7fffdae59000-7fffdae6e000 rw-p 7ffffffea000 00:00 0
> [stack]
> 7fffdaffe000-7fffdafff000 r-xp 7fffdaffe000 00:00 0
> [vdso]
> ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0
> [vsyscall]
> ERROR [line: 212] shmat failed - return: -1: Invalid argument
>
> This patch should be applied on the top of another patch I sent earlier
> with title "shmem_test_06
> Failed with Stack Randomization". Tested successfully on a x86_64 machine.
>
> Cai Qian
>
> Signed-off-by: CAI Qian <[EMAIL PROTECTED]>
>
> --- shmem_test_06.c.orig 2008-10-10 11:36:15.022862741 +0800
> +++ shmem_test_06.c 2008-10-10 12:25:45.473862020 +0800
> @@ -202,7 +202,13 @@
>
> if ((long)(shmptr[i] = (char *) shmat (shmid[i], (const void*)offset,
> 0)) == -1)
> {
> - sprintf(tmpstr, "shmat failed - return: %p", shmptr[i]);
> + /* If shmat(2) failed, we need the currect process address
> + space layout to debug. The failure can be random. */
> + sprintf (tmpstr, "cat /proc/%d/maps >&2", (int) getpid ());
> + fprintf (stderr, "heap %p\n", sbrk (0));
> + system (tmpstr);
> +
> + sprintf(tmpstr, "shmat failed - return: %ld", (long)shmptr[i]);
> sys_error (tmpstr, __LINE__);
> }
>
>
>
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--
Regards & Thanks--
Subrata
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