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121 lines
4.1 KiB
Python
Executable File
121 lines
4.1 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Copyright 2009 the V8 project authors. All rights reserved.
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials provided
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# with the distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# This is an utility for converting V8 heap logs into .hp files that can
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# be further processed using 'hp2ps' tool (bundled with GHC and Valgrind)
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# to produce heap usage histograms.
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# Sample usage:
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# $ ./shell --log-gc script.js
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# $ tools/process-heap-prof.py v8.log | hp2ps -c > script-heap-graph.ps
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# ('-c' enables color, see hp2ps manual page for more options)
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# or
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# $ tools/process-heap-prof.py --js-cons-profile v8.log | hp2ps -c > script-heap-graph.ps
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# to get JS constructor profile
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import csv, sys, time, optparse
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def ProcessLogFile(filename, options):
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if options.js_cons_profile:
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itemname = 'heap-js-cons-item'
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else:
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itemname = 'heap-sample-item'
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first_call_time = None
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sample_time = 0.0
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sampling = False
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try:
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logfile = open(filename, 'rb')
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try:
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logreader = csv.reader(logfile)
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print('JOB "v8"')
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print('DATE "%s"' % time.asctime(time.localtime()))
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print('SAMPLE_UNIT "seconds"')
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print('VALUE_UNIT "bytes"')
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for row in logreader:
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if row[0] == 'heap-sample-begin' and row[1] == 'Heap':
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sample_time = float(row[3])/1000.0
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if first_call_time == None:
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first_call_time = sample_time
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sample_time -= first_call_time
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print('BEGIN_SAMPLE %.2f' % sample_time)
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sampling = True
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elif row[0] == 'heap-sample-end' and row[1] == 'Heap':
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print('END_SAMPLE %.2f' % sample_time)
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sampling = False
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elif row[0] == itemname and sampling:
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print(row[1]),
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if options.count:
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print('%d' % (int(row[2]))),
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if options.size:
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print('%d' % (int(row[3]))),
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print
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finally:
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logfile.close()
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except:
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sys.exit('can\'t open %s' % filename)
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def BuildOptions():
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result = optparse.OptionParser()
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result.add_option("--js_cons_profile", help="Constructor profile",
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default=False, action="store_true")
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result.add_option("--size", help="Report object size",
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default=False, action="store_true")
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result.add_option("--count", help="Report object count",
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default=False, action="store_true")
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return result
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def ProcessOptions(options):
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if not options.size and not options.count:
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options.size = True
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return True
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def Main():
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parser = BuildOptions()
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(options, args) = parser.parse_args()
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if not ProcessOptions(options):
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parser.print_help()
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sys.exit();
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if not args:
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print "Missing logfile"
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sys.exit();
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ProcessLogFile(args[0], options)
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if __name__ == '__main__':
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sys.exit(Main())
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