1#!/usr/bin/env python 2# 3# Copyright 2009 the V8 project authors. All rights reserved. 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are 6# met: 7# 8# * Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# * Redistributions in binary form must reproduce the above 11# copyright notice, this list of conditions and the following 12# disclaimer in the documentation and/or other materials provided 13# with the distribution. 14# * Neither the name of Google Inc. nor the names of its 15# contributors may be used to endorse or promote products derived 16# from this software without specific prior written permission. 17# 18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30# This is an utility for converting V8 heap logs into .hp files that can 31# be further processed using 'hp2ps' tool (bundled with GHC and Valgrind) 32# to produce heap usage histograms. 33 34# Sample usage: 35# $ ./shell --log-gc script.js 36# $ tools/process-heap-prof.py v8.log | hp2ps -c > script-heap-graph.ps 37# ('-c' enables color, see hp2ps manual page for more options) 38# or 39# $ tools/process-heap-prof.py --js-cons-profile v8.log | hp2ps -c > script-heap-graph.ps 40# to get JS constructor profile 41 42 43import csv, sys, time, optparse 44 45def ProcessLogFile(filename, options): 46 if options.js_cons_profile: 47 itemname = 'heap-js-cons-item' 48 else: 49 itemname = 'heap-sample-item' 50 51 first_call_time = None 52 sample_time = 0.0 53 sampling = False 54 try: 55 logfile = open(filename, 'rb') 56 try: 57 logreader = csv.reader(logfile) 58 59 print('JOB "v8"') 60 print('DATE "%s"' % time.asctime(time.localtime())) 61 print('SAMPLE_UNIT "seconds"') 62 print('VALUE_UNIT "bytes"') 63 64 for row in logreader: 65 if row[0] == 'heap-sample-begin' and row[1] == 'Heap': 66 sample_time = float(row[3])/1000.0 67 if first_call_time == None: 68 first_call_time = sample_time 69 sample_time -= first_call_time 70 print('BEGIN_SAMPLE %.2f' % sample_time) 71 sampling = True 72 elif row[0] == 'heap-sample-end' and row[1] == 'Heap': 73 print('END_SAMPLE %.2f' % sample_time) 74 sampling = False 75 elif row[0] == itemname and sampling: 76 print(row[1]), 77 if options.count: 78 print('%d' % (int(row[2]))), 79 if options.size: 80 print('%d' % (int(row[3]))), 81 print 82 finally: 83 logfile.close() 84 except: 85 sys.exit('can\'t open %s' % filename) 86 87 88def BuildOptions(): 89 result = optparse.OptionParser() 90 result.add_option("--js_cons_profile", help="Constructor profile", 91 default=False, action="store_true") 92 result.add_option("--size", help="Report object size", 93 default=False, action="store_true") 94 result.add_option("--count", help="Report object count", 95 default=False, action="store_true") 96 return result 97 98 99def ProcessOptions(options): 100 if not options.size and not options.count: 101 options.size = True 102 return True 103 104 105def Main(): 106 parser = BuildOptions() 107 (options, args) = parser.parse_args() 108 if not ProcessOptions(options): 109 parser.print_help() 110 sys.exit(); 111 112 if not args: 113 print "Missing logfile" 114 sys.exit(); 115 116 ProcessLogFile(args[0], options) 117 118 119if __name__ == '__main__': 120 sys.exit(Main()) 121