mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-24 13:21:05 +00:00
101 lines
3.1 KiB
Python
Executable File
101 lines
3.1 KiB
Python
Executable File
#!/usr/bin/python
|
|
#
|
|
# This Source Code Form is subject to the terms of the Mozilla Public
|
|
# License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
# This script processes a `refcount' log, and finds out if any object leaked.
|
|
# It simply goes through the log, finds `AddRef' or `Ctor' lines, and then
|
|
# sees if they `Release' or `Dtor'. If not, it reports them as leaks.
|
|
# Please see README file in the same directory.
|
|
|
|
|
|
import sys
|
|
|
|
def print_output(allocation, obj_to_class):
|
|
'''Formats and prints output.'''
|
|
items = []
|
|
for obj, count, in allocation.iteritems():
|
|
# Adding items to a list, so we can sort them.
|
|
items.append((obj, count))
|
|
# Sorting by count.
|
|
items.sort(key=lambda item: item[1])
|
|
|
|
for obj, count, in items:
|
|
print "{obj} ({count}) @ {class_name}".format(obj=obj,
|
|
count=count,
|
|
class_name=obj_to_class[obj])
|
|
|
|
def process_log(log_lines):
|
|
'''Process through the log lines, and print out the result.
|
|
|
|
@param log_lines: List of strings.
|
|
'''
|
|
allocation = {}
|
|
class_count = {}
|
|
obj_to_class = {}
|
|
|
|
for log_line in log_lines:
|
|
if not log_line.startswith('<'):
|
|
continue
|
|
|
|
(class_name,
|
|
obj,
|
|
ignore,
|
|
operation,
|
|
count,) = log_line.strip('\r\n').split(' ')
|
|
|
|
# for AddRef/Release `count' is the refcount,
|
|
# for Ctor/Dtor it's the size.
|
|
|
|
if ((operation == 'AddRef' and count == '1') or
|
|
operation == 'Ctor'):
|
|
# Examples:
|
|
# <nsStringBuffer> 0x01AFD3B8 1 AddRef 1
|
|
# <PStreamNotifyParent> 0x08880BD0 8 Ctor (20)
|
|
class_count[class_name] = class_count.setdefault(class_name, 0) + 1
|
|
allocation[obj] = class_count[class_name]
|
|
obj_to_class[obj] = class_name
|
|
|
|
elif ((operation == 'Release' and count == '0') or
|
|
operation == 'Dtor'):
|
|
# Examples:
|
|
# <nsStringBuffer> 0x01AFD3B8 1 Release 0
|
|
# <PStreamNotifyParent> 0x08880BD0 8 Dtor (20)
|
|
if obj not in allocation:
|
|
print "An object was released that wasn't allocated!",
|
|
print obj, "@", class_name
|
|
else:
|
|
allocation.pop(obj)
|
|
obj_to_class.pop(obj)
|
|
|
|
# Printing out the result.
|
|
print_output(allocation, obj_to_class)
|
|
|
|
|
|
def print_usage():
|
|
print
|
|
print "Usage: find-leakers.py [log-file]"
|
|
print
|
|
print "If `log-file' provided, it will read that as the input log."
|
|
print "Else, it will read the stdin as the input log."
|
|
print
|
|
|
|
def main():
|
|
'''Main method of the script.'''
|
|
if len(sys.argv) == 1:
|
|
# Reading log from stdin.
|
|
process_log(sys.stdin.readlines())
|
|
elif len(sys.argv) == 2:
|
|
# Reading log from file.
|
|
with open(sys.argv[1], 'r') as log_file:
|
|
log_lines = log_file.readlines()
|
|
process_log(log_lines)
|
|
else:
|
|
print 'ERROR: Invalid number of arguments'
|
|
print_usage()
|
|
|
|
if __name__ == '__main__':
|
|
main()
|
|
|