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restorer: Print error code from sys_set_robust_list

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Some syscalls return error code, so for easier debugging
instead of zapping it -- print it together with error
message.

And make error message more detailed as well.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Cyrill Gorcunov 2013-03-28 15:27:21 +04:00 • committed by Pavel Emelyanov
parent 87d0d61e41
commit 421ceffaa5
1 changed files with 6 additions and 2 deletions
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8
pie/restorer.c
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@ -206,8 +206,12 @@ static int restore_thread_common(struct rt_sigframe *sigframe,
sys_set_tid_address((int *)decode_pointer(args->clear_tid_addr));
if (args->has_futex) {
if (sys_set_robust_list(decode_pointer(args->futex_rla), args->futex_rla_len)) {
pr_err("Robust list err\n");
int ret;
ret = sys_set_robust_list(decode_pointer(args->futex_rla),
args->futex_rla_len);
if (ret) {
pr_err("Failed to recover futex robust list: %d\n", ret);
return -1;
}
}