Tcl Source Code

socket_inet-2.12 and socket_inet6-2.12 fail on OpenBSD 7.9: the child process (the server) dies with "unable to alloc 4168 bytes" and leaves a core file of 1.6 GB, which can fill /tmp.

The server writes lines of 720000 bytes to a non-blocking socket in a loop, with after 0, until [chan puts] fails after the client closed the connection. With unread data in the client's receive buffer, OpenBSD reports the error to the writer only after about 5 seconds (FreeBSD after 0.05 s, Linux immediately). Meanwhile all the data is queued in memory, until the process exceeds its data size limit.

This is a problem of the test, not of the socket channel: the error is reported correctly when it comes.

Proposed fix in branch test-socket-2.12-openbsd: the server does not queue more data while the previous line is not sent yet.