Pressing Ctrl-C while a program loads make the program hang

fachat / GeckOS-V2

GeckOS version 2, a multi-tasking and multithreading operating system for the 6502

http://www.6502.org/users/andre/osa/index.html

GNU General Public License v2.0

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Pressing Ctrl-C while a program loads make the program hang #78

Open fachat opened 8 months ago

fachat commented 8 months ago

After implementing #29 , when pressing Ctrl-C (RUN/STOP) while the loader is loading the file to be executed, terminates the loader, but does not free the SENDBUF PSEM. This makes the system hang on each function that uses SENDBUF

fachat commented 8 months ago

This should automatically be fixed when implementing the new buffer / streams handling in NG - so won't fix here.

fachat commented 8 months ago

Addition: similar problems appear when the child process is suspended (e.g. via Ctrl-Z) while still in the loading process.

fachat commented 8 months ago

Implementation idea for NG buffer/send/receive:

alloc a new buffer for stream
put everything to be sent into buffer
send buffer non-blocking
register stream and buffer with the child task registry
wait for reply from child, but check signals at that same time
if signal received, return
handle any checks in further waitpid/checksig calls

Note: need to check for race conditions.