mirror of
https://git.notmuchmail.org/git/notmuch
synced 2024-11-24 11:58:10 +01:00
72 lines
2.6 KiB
Python
72 lines
2.6 KiB
Python
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# This gdb Python script runs notmuch new and simulates killing and
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# restarting notmuch new after every Xapian commit. To simulate this
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# more efficiently, this script runs notmuch new and, immediately
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# after every Xapian commit, it *pauses* the running notmuch new,
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# copies the entire database and maildir to a snapshot directory, and
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# executes a full notmuch new on that snapshot, comparing the final
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# results with the expected output. It can then resume the paused
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# notmuch new, which is still running on the original maildir, and
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# repeat this process.
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import gdb
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import os
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import glob
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import shutil
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import subprocess
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gdb.execute('set args new')
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# Make Xapian commit after every operation instead of batching
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gdb.execute('set environment XAPIAN_FLUSH_THRESHOLD = 1')
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maildir = os.environ['MAIL_DIR']
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# Trap calls to rename, which happens just before Xapian commits
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class RenameBreakpoint(gdb.Breakpoint):
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def __init__(self, *args, **kwargs):
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super(RenameBreakpoint, self).__init__(*args, **kwargs)
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self.last_inodes = {}
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self.n = 0
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def stop(self):
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# As an optimization, only consider snapshots after a Xapian
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# has really committed. Xapian overwrites record.base? as the
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# last step in the commit, so keep an eye on their inumbers.
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inodes = {}
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for path in glob.glob('%s/.notmuch/xapian/record.base*' % maildir):
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inodes[path] = os.stat(path).st_ino
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if inodes == self.last_inodes:
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# Continue
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return False
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self.last_inodes = inodes
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# Save a backtrace in case the test does fail
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backtrace = gdb.execute('backtrace', to_string=True)
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open('backtrace.%d' % self.n, 'w').write(backtrace)
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# Snapshot the database
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shutil.rmtree('%s.snap/.notmuch' % maildir)
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shutil.copytree('%s/.notmuch' % maildir, '%s.snap/.notmuch' % maildir)
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# Restore the mtime of $MAIL_DIR.snap/
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shutil.copystat('%s/.notmuch' % maildir, '%s.snap/.notmuch' % maildir)
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# Run notmuch new to completion on the snapshot
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env = os.environ.copy()
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env.update(NOTMUCH_CONFIG=os.environ['NOTMUCH_CONFIG'] + '.snap',
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XAPIAN_FLUSH_THRESHOLD='1000')
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subprocess.check_call(
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['notmuch', 'new'], env=env, stdout=open('/dev/null', 'w'))
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subprocess.check_call(
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['notmuch', 'search', '*'], env=env,
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stdout=open('search.%d' % self.n, 'w'))
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# Tell the shell how far we've gotten
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open('outcount', 'w').write(str(self.n + 1))
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# Continue
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self.n += 1
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return False
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RenameBreakpoint('rename')
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gdb.execute('run')
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