Pike-devel November 2017

pike-devel@lists.lysator.liu.se

7 participants
45 discussions

Garbage i Pike core?
by Jonas Walld�n ＠ Pike developers forum 22 Nov '17

22 Nov '17

Vi pratar en del om GC-körningar i CMS/EP i Slack, och på en i stort sett obelastad EP hos Kvällsstunden stack detta ut i manuell GC-körning: src/pike_search.c:197 _static_modules.Builtin()->Sear... 22 9 -24 148464 Är det någon intern optimering av (sträng?)sökning som läcker garbage vid normal användning?

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Proposal: Create Stdio.Port from systemd-provided socket
by Chris Angelico 22 Nov '17

22 Nov '17

Branch: rosuav/systemd-sockets Currently, you can create a Stdio.Port("stdin") as a means of accepting a socket handed to you as FD 0. However, there's no way to accept a socket given as any other FD, making it impossible to use this for systemd's sockets. Example: $ cat /etc/systemd/system/listendemo.service [Unit] Description=Listen Demo Requires=listendemo.socket [Service] User=rosuav ExecStart=/usr/local/bin/pike /home/rosuav/listendemo.pike WorkingDirectory=/home/rosuav $ cat /etc/systemd/system/listendemo.socket [Socket] ListenStream=123 $ cat listendemo.pike object mainsock = Stdio.Port("systemd", acceptloop); void acceptloop() { while (object sock=mainsock->accept()) { write("Accepted sock: %O\n", sock); sock->write("Stub\n"); sock->close(); } } int main() { write("Main sock: %O\n", mainsock); return -1; } Note that the "User=rosuav" directive means that Pike is run as a non-root user. This spares the application the hassle of managing privileges securely, as it never gets root privileges (assuming, of course, that the only reason it needed root was to bind to a privileged port, which is true for a lot of programs). As with "stdin" mode, the second parameter is optional (blocking vs nonblocking). This won't break on non-systemd systems for two reasons: firstly, all it ever does is query environment variables, and secondly, it does this only if the application requests it explicitly, so you have to actually ask for it. Is this something that would be useful? Feel free to bikeshed the API - it's not in 8.1 yet, so anything can change. ChrisA

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PostgreSQL pgsql driver: the dust has settled
by Stephen R. van den Berg 22 Nov '17

22 Nov '17

After some extreme hacking and debugging, the dust around the pgsql driver has finally settled. The fixes mostly concern rare conditions when the driver is being (ab)used while under heavy error rates from the database, cancelling random queries, dropping and/or destructing objects willy-nilly. It passes all tests that I have with flying colours now, no exceptions. People using PostgreSQL are invited to test the improved driver (both in Pike 8.0 and in Pike 8.1). -- Stephen.

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Pike 8.0 verify fails
by Stephen R. van den Berg 15 Nov '17

15 Nov '17

For ages already, the standard "make verify" in xenofarm on devel2.cuci.nl fails consistently (segfaults, basically). I decided to investigate, only to notice that it crashes running "test_pike testsuite" in encode.c trying to execute inline assembly that has not been relocated because it has no relocation information (but it *does* contain at least two references that need to be relocated). This occurs really early in the startup process. This happens using -O3, without RTL-debug. Then I tried running without C-optimisation; and it seems that still goes wrong. Trying to trace that code in gdb is a !@#$%^&*() nightmare due to the multiple include macros being used as templates in that file. When running that with RTL-debug turned on, the problem goes away (but you get back other problems, see recent verify runs). I gave up for the moment. -- Stephen.

1 0

Crypto.SCRAM New proposed module
by Stephen R. van den Berg 13 Nov '17

13 Nov '17

A proposed new class, currently in 8.1. It implements the SCRAM protocol. The implementation has already been battle-tested in pgsql in 8.1. Any suggestions related to functionality, interface and/or naming? Because I like to keep the implementation of pgsql in 8.0 and 8.1 mostly in sync, I would like this class to be backported to 8.0 as well. -- Stephen.

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Pike-devel November 2017