Linux调试阻塞进程的一个方法:/proc/sys/debug/show-state-pid

/*
*By Neil Zhao (neilchiao at gmail.com)
*转载请注明出处：
*/

 

 

 

echo PID > /proc/sys/debug/show-state-pid

如：
echo 57 > /proc/sys/debug/show-state-pid
                                               sibling
  task             PC      pid father child younger older
rtnetlink     S C026BCB0     0    35     30            36    34 (NOTLB)
[] (schedule+0x0/0x5a0) from [] (schedule_timeout+0x28/0xcc)
[] (schedule_timeout+0x0/0xcc) from [] (unix_wait_for_peer+0xd0/0xf0)
 r8 = C2950F24  r7 = 7FFFFFFF  r6 = C2A0C000  r5 = C2950DC0
 r4 = C2A0DD24
[] (unix_wait_for_peer+0x0/0xf0) from [] (unix_dgram_sendmsg+0x3c4/0x5
[] (unix_dgram_sendmsg+0x0/0x518) from [] (sock_sendmsg+0xb8/0xe4)
[] (sock_sendmsg+0x0/0xe4) from [] (sys_sendto+0xb0/0xc8)
 r7 = 00176894  r6 = BDFFE92C  r5 = 00000000  r4 = C29D2E40
[] (sys_sendto+0x0/0xc8) from [] (sys_socketcall+0x158/0x1e4)
[] (sys_socketcall+0x0/0x1e4) from [] (ret_fast_syscall+0x0/0x2c)
 r5 = 0000022C  r4 = 00176894

表示阻塞在unix_wait_for_peer函数