cmdserver: include pid of server handling requests in hello message
Because unix-mode server forks child process per connection, client does not
know the pid of the server that will handle requests. The pid is necessary
to interrupt hung process:
1. client connects to socket server
2. server accepts the connection, forks, and tells pid
3. client requests "runcommand pull"
.. hung ..
4. client sends SIGINT to the (forked) server
5. server returns from I/O wait
Note that getsockopt(SO_PEERCRED) of Linux cannot be used because the server
fork()s after accept().
"""Extension to verify locks are obtained in the required places.
This works by wrapping functions that should be surrounded by a lock
and asserting the lock is held. Missing locks are called out with a
traceback printed to stderr.
This currently only checks store locks, not working copy locks.
"""
import os
from mercurial import util
def _checklock(repo):
l = repo._lockref and repo._lockref()
if l is None or not l.held:
util.debugstacktrace('missing lock', skip=1)
def reposetup(ui, repo):
orig = repo.__class__
class lockcheckrepo(repo.__class__):
def _writejournal(self, *args, **kwargs):
_checklock(self)
return orig._writejournal(self, *args, **kwargs)
def transaction(self, *args, **kwargs):
_checklock(self)
return orig.transaction(self, *args, **kwargs)
# TODO(durin42): kiilerix had a commented-out lock check in
# _writebranchcache and _writerequirements
def _tag(self, *args, **kwargs):
_checklock(self)
return orig._tag(self, *args, **kwargs)
def write(self, *args, **kwargs):
assert os.path.lexists(self._join('.hg/wlock'))
return orig.write(self, *args, **kwargs)
repo.__class__ = lockcheckrepo