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