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  • Committer: John Arbash Meinel
  • Date: 2007-04-09 22:11:22 UTC
  • mto: This revision was merged to the branch mainline in revision 2566.
  • Revision ID: john@arbash-meinel.com-20070409221122-qh66j4pk3kqxjn9c
Cleanup bzrlib/benchmarks/* so that everything at least has a valid doc string.

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bzrlib/strace.py
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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"""Support for running strace against the current process."""
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import errno
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import os
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import signal
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import subprocess
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    :return: a tuple: function-result, a StraceResult.
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    """
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    return strace_detailed(function, args, kwargs)
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def strace_detailed(function, args, kwargs, follow_children=True):
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    # FIXME: strace is buggy
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    # (https://bugs.launchpad.net/ubuntu/+source/strace/+bug/103133) and the
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    # test suite hangs if the '-f' is given to strace *and* more than one
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    # thread is running. Using follow_children=False allows the test suite to
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    # disable fork following to work around the bug.
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    # capture strace output to a file
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    log_file = tempfile.NamedTemporaryFile()
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    log_file_fd = log_file.fileno()
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    pid = os.getpid()
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    # start strace
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    strace_cmd = ['strace', '-r', '-tt', '-p', str(pid), '-o', log_file.name]
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    if follow_children:
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        strace_args.append('-f')
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    proc = subprocess.Popen(strace_cmd,
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                            stdout=subprocess.PIPE,
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                            stderr=subprocess.STDOUT)
 
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    proc = subprocess.Popen(['strace',
 
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        '-f', '-r', '-tt', '-p', str(pid), '-o', log_file.name
 
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        ],
 
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        stdout=subprocess.PIPE,
 
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        stderr=subprocess.STDOUT)
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    # Wait for strace to attach
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    attached_notice = proc.stdout.readline()
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    # Run the function to strace