v8/tools/windows-tick-processor.py

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#!/usr/bin/env python
#
# Copyright 2008 the V8 project authors. All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# Usage: process-ticks.py <binary> <logfile>
#
# Where <binary> is the binary program name (eg, v8_shell.exe) and
# <logfile> is the log file name (eg, v8.log).
#
# This tick processor expects to find a map file for the binary named
# binary.map if the binary is named binary.exe. The tick processor
# only works for statically linked executables - no information about
# shared libraries is logged from v8 on Windows.
import os, re, sys, tickprocessor, getopt
class WindowsTickProcessor(tickprocessor.TickProcessor):
def Unmangle(self, name):
"""Performs very simple unmangling of C++ names.
Does not handle arguments and template arguments. The mangled names have
the form:
?LookupInDescriptor@JSObject@internal@v8@@...arguments info...
"""
# Name is mangled if it starts with a question mark.
is_mangled = re.match("^\?(.*)", name)
if is_mangled:
substrings = is_mangled.group(1).split('@')
try:
# The function name is terminated by two @s in a row. Find the
# substrings that are part of the function name.
index = substrings.index('')
substrings = substrings[0:index]
except ValueError:
# If we did not find two @s in a row, the mangled name is not in
# the format we expect and we give up.
return name
substrings.reverse()
function_name = "::".join(substrings)
return function_name
return name
def ParseMapFile(self, filename):
"""Parse map file and add symbol information to the cpp entries."""
# Locate map file.
has_dot = re.match('^([a-zA-F0-9_-]*)[\.]?.*$', filename)
if has_dot:
map_file_name = has_dot.group(1) + '.map'
try:
map_file = open(map_file_name, 'rb')
except IOError:
sys.exit("Could not open map file: " + map_file_name)
else:
sys.exit("Could not find map file for executable: " + filename)
try:
max_addr = 0
min_addr = 2**30
# Process map file and search for function entries.
row_regexp = re.compile(' 0001:[0-9a-fA-F]{8}\s*([_\?@$0-9a-zA-Z]*)\s*([0-9a-fA-F]{8}).*')
for line in map_file:
row = re.match(row_regexp, line)
if row:
addr = int(row.group(2), 16)
if addr > max_addr:
max_addr = addr
if addr < min_addr:
min_addr = addr
mangled_name = row.group(1)
name = self.Unmangle(mangled_name)
self.cpp_entries.Insert(addr, tickprocessor.CodeEntry(addr, name));
i = min_addr
# Mark the pages for which there are functions in the map file.
while i < max_addr:
page = i >> 12
self.vm_extent[page] = 1
i += 4096
finally:
map_file.close()
def Usage():
print("Usage: windows-tick-processor.py binary logfile-name");
sys.exit(2)
def Main():
# parse command line options
state = None;
try:
opts, args = getopt.getopt(sys.argv[1:], "jgco", ["js", "gc", "compiler", "other"])
except getopt.GetoptError:
usage()
# process options.
for key, value in opts:
if key in ("-j", "--js"):
state = 0
if key in ("-g", "--gc"):
state = 1
if key in ("-c", "--compiler"):
state = 2
if key in ("-o", "--other"):
state = 3
# do the processing.
if len(args) != 2:
Usage();
tickprocessor = WindowsTickProcessor()
tickprocessor.ParseMapFile(args[0])
tickprocessor.ProcessLogfile(args[1], state)
tickprocessor.PrintResults()
if __name__ == '__main__':
Main()