Add a 'zkill' script, which is more-or-less a fancy (although not necessarily

very robust) version of killall. Because I like making shiny new wheels out of
spare parts.

For use by buildbots when people insist on making cc1 infinite loop. :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86484 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 276 insertions, 0 deletions

diff --git a/utils/Misc/zkill b/utils/Misc/zkill
new file mode 100755
index 0000000000..bc0bfd586f
--- /dev/null
+++ b/utils/Misc/zkill
@@ -0,0 +1,276 @@
+#!/usr/bin/env python
+
+import os
+import re
+import sys
+
+def _write_message(kind, message):
+    import inspect, os, sys
+
+    # Get the file/line where this message was generated.
+    f = inspect.currentframe()
+    # Step out of _write_message, and then out of wrapper.
+    f = f.f_back.f_back
+    file,line,_,_,_ = inspect.getframeinfo(f)
+    location = '%s:%d' % (os.path.basename(file), line)
+
+    print >>sys.stderr, '%s: %s: %s' % (location, kind, message)
+
+note = lambda message: _write_message('note', message)
+warning = lambda message: _write_message('warning', message)
+error = lambda message: (_write_message('error', message), sys.exit(1))
+
+def re_full_match(pattern, str):
+    m = re.match(pattern, str)
+    if m and m.end() != len(str):
+        m = None
+    return m
+
+def parse_time(value):
+    minutes,value = value.split(':',1)
+    if '.' in value:
+        seconds,fseconds = value.split('.',1)
+    else:
+        seconds = value
+    return int(minutes) * 60 + int(seconds) + float('.'+fseconds)
+
+def extractExecutable(command):
+    """extractExecutable - Given a string representing a command line, attempt
+    to extract the executable path, even if it includes spaces."""
+
+    # Split into potential arguments.
+    args = command.split(' ')
+
+    # Scanning from the beginning, try to see if the first N args, when joined,
+    # exist. If so that's probably the executable.
+    for i in range(1,len(args)):
+        cmd = ' '.join(args[:i])
+        if os.path.exists(cmd):
+            return cmd
+
+    # Otherwise give up and return the first "argument".
+    return args[0]
+
+class Struct:
+    def __init__(self, **kwargs):
+        self.fields = kwargs.keys()
+        self.__dict__.update(kwargs)
+
+    def __repr__(self):
+        return 'Struct(%s)' % ', '.join(['%s=%r' % (k,getattr(self,k))
+                                         for k in self.fields])
+
+kExpectedPSFields = [('PID', int, 'pid'),
+                     ('USER', str, 'user'),
+                     ('COMMAND', str, 'command'),
+                     ('%CPU', float, 'cpu_percent'),
+                     ('TIME', parse_time, 'cpu_time'),
+                     ('VSZ', int, 'vmem_size'),
+                     ('RSS', int, 'rss')]
+def getProcessTable():
+    import subprocess
+    p = subprocess.Popen(['ps', 'aux'], stdout=subprocess.PIPE,
+                         stderr=subprocess.PIPE)
+    out,err = p.communicate()
+    res = p.wait()
+    if p.wait():
+        error('unable to get process table')
+    elif err.strip():
+        error('unable to get process table: %s' % err)
+
+    lns = out.split('\n')
+    it = iter(lns)
+    header = it.next().split()
+    numRows = len(header)
+
+    # Make sure we have the expected fields.
+    indexes = []
+    for field in kExpectedPSFields:
+        try:
+            indexes.append(header.index(field[0]))
+        except:
+            if opts.debug:
+                raise
+            error('unable to get process table, no %r field.' % field[0])
+
+    table = []
+    for i,ln in enumerate(it):
+        if not ln.strip():
+            continue
+
+        fields = ln.split(None, numRows - 1)
+        if len(fields) != numRows:
+            warning('unable to process row: %r' % ln)
+            continue
+
+        record = {}
+        for field,idx in zip(kExpectedPSFields, indexes):
+            value = fields[idx]
+            try:
+                record[field[2]] = field[1](value)
+            except:
+                if opts.debug:
+                    raise
+                warning('unable to process %r in row: %r' % (field[0], ln))
+                break
+        else:
+            # Add our best guess at the executable.
+            record['executable'] = extractExecutable(record['command'])
+            table.append(Struct(**record))
+
+    return table
+
+def getSignalValue(name):
+    import signal
+    if name.startswith('SIG'):
+        value = getattr(signal, name)
+        if value and isinstance(value, int):
+            return value
+    error('unknown signal: %r' % name)
+
+import signal
+kSignals = {}
+for name in dir(signal):
+    if name.startswith('SIG') and name == name.upper() and name.isalpha():
+        kSignals[name[3:]] = getattr(signal, name)
+
+def main():
+    global opts
+    from optparse import OptionParser, OptionGroup
+    parser = OptionParser("usage: %prog [options] {pid}*")
+
+    # FIXME: Add -NNN and -SIGNAME options.
+
+    parser.add_option("-s", "", dest="signalName",
+                      help="Name of the signal to use (default=%default)",
+                      action="store", default='INT',
+                      choices=kSignals.keys())
+    parser.add_option("-l", "", dest="listSignals",
+                      help="List known signal names",
+                      action="store_true", default=False)
+
+    parser.add_option("-n", "--dry-run", dest="dryRun",
+                      help="Only print the actions that would be taken",
+                      action="store_true", default=False)
+    parser.add_option("-v", "--verbose", dest="verbose",
+                      help="Print more verbose output",
+                      action="store_true", default=False)
+    parser.add_option("", "--debug", dest="debug",
+                      help="Enable debugging output",
+                      action="store_true", default=False)
+    parser.add_option("", "--force", dest="force",
+                      help="Perform the specified commands, even if it seems like a bad idea",
+                      action="store_true", default=False)
+
+    inf = float('inf')
+    group = OptionGroup(parser, "Process Filters")
+    group.add_option("", "--name", dest="execName", metavar="REGEX",
+                      help="Kill processes whose name matches the given regexp",
+                      action="store", default=None)
+    group.add_option("", "--exec", dest="execPath", metavar="REGEX",
+                      help="Kill processes whose executable matches the given regexp",
+                      action="store", default=None)
+    group.add_option("", "--user", dest="userName", metavar="REGEX",
+                      help="Kill processes whose user matches the given regexp",
+                      action="store", default=None)
+    group.add_option("", "--min-cpu", dest="minCPU", metavar="PCT",
+                      help="Kill processes with CPU usage >= PCT",
+                      action="store", type=float, default=None)
+    group.add_option("", "--max-cpu", dest="maxCPU", metavar="PCT",
+                      help="Kill processes with CPU usage <= PCT",
+                      action="store", type=float, default=inf)
+    group.add_option("", "--min-mem", dest="minMem", metavar="N",
+                      help="Kill processes with virtual size >= N (MB)",
+                      action="store", type=float, default=None)
+    group.add_option("", "--max-mem", dest="maxMem", metavar="N",
+                      help="Kill processes with virtual size <= N (MB)",
+                      action="store", type=float, default=inf)
+    group.add_option("", "--min-rss", dest="minRSS", metavar="N",
+                      help="Kill processes with RSS >= N",
+                      action="store", type=float, default=None)
+    group.add_option("", "--max-rss", dest="maxRSS", metavar="N",
+                      help="Kill processes with RSS <= N",
+                      action="store", type=float, default=inf)
+    group.add_option("", "--min-time", dest="minTime", metavar="N",
+                      help="Kill processes with CPU time >= N (seconds)",
+                      action="store", type=float, default=None)
+    group.add_option("", "--max-time", dest="maxTime", metavar="N",
+                      help="Kill processes with CPU time <= N (seconds)",
+                      action="store", type=float, default=inf)
+    parser.add_option_group(group)
+
+    (opts, args) = parser.parse_args()
+
+    if opts.listSignals:
+        items = [(v,k) for k,v in kSignals.items()]
+        items.sort()
+        for i in range(0, len(items), 4):
+            print '\t'.join(['%2d) SIG%s' % (k,v)
+                             for k,v in items[i:i+4]])
+        sys.exit(0)
+
+    # Figure out the signal to use.
+    signal = kSignals[opts.signalName]
+    signalValueName = str(signal)
+    if opts.verbose:
+        name = dict((v,k) for k,v in kSignals.items()).get(signal,None)
+        if name:
+            signalValueName = name
+            note('using signal %d (SIG%s)' % (signal, name))
+        else:
+            note('using signal %d' % signal)
+
+    # Get the pid list to consider.
+    pids = set()
+    for arg in args:
+        try:
+            pids.add(int(arg))
+        except:
+            parser.error('invalid positional argument: %r' % arg)
+
+    filtered = ps = getProcessTable()
+
+    # Apply filters.
+    if pids:
+        filtered = [p for p in filtered
+                    if p.pid in pids]
+    if opts.execName is not None:
+        filtered = [p for p in filtered
+                    if re_full_match(opts.execName,
+                                     os.path.basename(p.executable))]
+    if opts.execPath is not None:
+        filtered = [p for p in filtered
+                    if re_full_match(opts.execPath, p.executable)]
+    if opts.userName is not None:
+        filtered = [p for p in filtered
+                    if re_full_match(opts.userName, p.user)]
+    filtered = [p for p in filtered
+                if opts.minCPU <= p.cpu_percent <= opts.maxCPU]
+    filtered = [p for p in filtered
+                if opts.minMem <= float(p.vmem_size) / (1<<20) <= opts.maxMem]
+    filtered = [p for p in filtered
+                if opts.minRSS <= p.rss <= opts.maxRSS]
+    filtered = [p for p in filtered
+                if opts.minTime <= p.cpu_time <= opts.maxTime]
+
+    if len(filtered) == len(ps):
+        if not opts.force and not opts.dryRun:
+            error('refusing to kill all processes without --force')
+
+    if not filtered:
+        warning('no processes selected')
+
+    for p in filtered:
+        if opts.verbose:
+            note('kill(%r, %s) # (user=%r, executable=%r, CPU=%2.2f%%, time=%r, vmem=%r, rss=%r)' %
+                 (p.pid, signalValueName, p.user, p.executable, p.cpu_percent, p.cpu_time, p.vmem_size, p.rss))
+        if not opts.dryRun:
+            try:
+                os.kill(p.pid, signal)
+            except OSError:
+                if opts.debug:
+                    raise
+                warning('unable to kill PID: %r' % p.pid)
+
+if __name__ == '__main__':
+    main()