How to get .gcda files when the process is killed?

I have a binary build with -fprofile-arcs and -ftest-coverage. The binary is run by a process monitor which spawns the process as a child process. Then, when I want the process to exit, I have to go through the process monitor. It sends a SIGKILL to the process. I found out that .gcda files do not generate in this case. What can I do?

EDIT: Actually the process monitor first tries to make the process exit. However, the ProcessMonitor library (used in each process) calls _exit instead of exit when the user issues a command to stop the process. This is the cause of all trouble.

SIGKILL is a "hard" kill signal, that cannot be caught by the application. Therefore, the app has no chance to write out the .gcda file.

I see two options:

1. Catch signals other than SIGKILL: any sensible process monitor should send a SIGTERM first. init and the batch managers I've encountered do this. SIGKILL is a last resort, so it should be sent only after SIGTERM followed by a grace period.
2. Workaround: run the program via an intermediate program that gets the SIGKILL; have the actual program check periodically (or in a separate thread) if its parent still lives, and if not, have it exit gracefully.