Unblocking processes in interprocess messaging passing

1. A computer-implemented method comprising:

sending a message by a sending thread of a client process to a server process, wherein the sending thread of the client process is blocked by the sending to await a reply to the message from the server process;

determining by an operating system managing the client process and the server process that a timeout has expired without the server process having replied to the message;

upon determining that the timeout has expired without the server process having replied to the message, sending a request to the server process to unblock the sending thread of the client process by replying to the message;

after sending the request for the server process to unblock the sending thread by replying to the message, determining, by the operating system, that a further period has elapsed without the server process having replied to the message; and

upon determining that the further period has elapsed without the server process having unblocked the sending thread by replying to the message, triggering one or more actions related to the server process.

2. The computer-implemented method of claim 1 , wherein the one or more actions include sending a signal to the server process.

3. The computer-implemented method of claim 2 , wherein the signal comprises a signal to the server process to terminate.

4. The computer-implemented method of claim 1 , wherein the one or more actions include restarting the operating system.

5. The computer-implemented method of claim 1 , wherein the one or more actions are performed in sequence.

6. The computer-implemented method of claim 5 , wherein the one or more actions are performed in sequence with a configurable delay between the performing of a given one of the actions and the performing of a next one of the actions.

7. The computer-implemented method of claim 1 , further comprising identifying the one or more actions based on at least one of a process name of the server process or a process identifier of the server process.

8. The computer-implemented method of claim 1 , wherein triggering the one or more actions related to the server process includes sending an indication identifying the server process to a server monitor process, the server monitor process causing the one or more actions to be performed responsive to the indication.

9. The computer-implemented method of claim 8 , wherein causing the one or more actions to be performed responsive to the indication includes:

sending, by the server monitor process, a request to the operating system that further indications identifying the server process be suppressed.

10. The computer-implemented method of claim 1 wherein the client process is safety-certified and wherein the server process is not safety-certified.

11. A non-transitory computer-readable storage medium storing an operating system comprising instructions that, when executed by one or more processors of a computer system cause the computer system to:

receive, by a kernel of the operating system from a client process managed by the operating system, a call to send a message to a server process, the call blocking a calling thread of the client process to await a reply to the message from the server process;

deliver, by the kernel, the message to the server process;

determine that a timeout has expired without the server process having replied to the message;

upon determining that the timeout has expired without the server process having replied to the message, send, by the kernel to the server process, a request for the server process to reply to the message;

after sending the request for the server process to reply to the message, determine that a further period of time has elapsed without the server process having replied to the message; and

upon determining that the further period of time has elapsed without the server process having replied to the message, triggering, by the kernel, one or more actions related to the server process.

12. The computer-readable storage medium of claim 11 , wherein the one or more actions include sending a signal to the server process.

13. The computer-readable storage medium of claim 12 , wherein the signal is a signal to the server process to terminate.

14. The computer-readable storage medium of claim 11 , wherein the one or more actions include rebooting the computer system.

15. The computer-readable storage medium of claim 11 , wherein the one or more actions are performed in sequence.

16. The computer-readable storage medium of claim 15 , wherein the one or more actions are performed in sequence with a configurable delay between the performing of a given one of the actions and the performing of a next one of the actions.

17. The computer-readable storage medium of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the computer system to:

identify the one or more actions based on at least one of a process name of the server process and a process identifier of the server process.

18. The computer-readable storage medium of claim 11 , wherein the operating system includes a server monitor process, and wherein triggering the one or more actions related to the server process includes sending, by the kernel to the server monitor process, an indication identifying the server process, the server monitor process causing the one or more actions to be performed responsive to the indication.

19. A computer system comprising:

one or more processors; and

a memory communicably coupled to the one or more processors, the memory storing instructions that, when executed by at least one of the one or more processors, cause the computer system to:

receive, by a kernel of an operating system of the computer system from a client process managed by the operating system, a call to send a message to a server process, the call blocking a calling thread of the client process to await a reply to the message from the server process;

deliver, by the kernel, the message to the server process;

determine that a timeout has expired without the server process having replied to the message;

send, by the kernel to the server process, a request for the server process to reply to the message;

determine that a further period of time has elapsed without the server process having replied to the message; and

trigger, by the kernel, one or more actions related to the server process.

20. The computer system of claim 19 , wherein the one or more actions include sending a signal to the server process.

21. The computer system of claim 20 , wherein the signal is a signal to the server process to terminate.

22. The computer system of claim 19 , wherein the one or more actions include rebooting the computer system.

23. The computer system of claim 19 , wherein the one or more actions are performed in sequence.

24. The computer system of claim 23 , wherein the one or more actions are performed in sequence with a configurable delay between the performing of a given one of the actions and the performing of a next one of the actions.

25. The computer system of claim 19 , wherein the instructions, when executed by the at least one of the one or more processors, further cause the computer system to:

identify the one or more actions based on at least one of a process name of the server process and a process identifier of the server process.

26. The computer system of claim 19 , wherein the operating system includes a server monitor process, and wherein triggering the one or more actions related to the server process includes sending, by the kernel to the server monitor process, an indication identifying the server process, the server monitor process causing the one or more actions to be performed responsive to the indication.