1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
#!/usr/bin/env python
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Symbolizes and prints live objects as recorded by tcmalloc's
HeapProfilerDumpLiveObjects.
"""
import os
import re
import subprocess
import sys
import tempfile
def usage():
print """\
Usage:
tools/tcmalloc/print-live-objects.py out/Debug/chrome leaks.dmp
"""
def LoadDump(dump_file):
result = []
leakfmt = re.compile(
r"^\s*1:\s*(\d+)\s*\[\s*1:\s*\d+\]\s*@(0x[a-f0-9]+)((\s+0x[a-f0-9]+)*)$")
line_no = 0
with open(dump_file) as f:
for line in f:
line_no = line_no + 1
matches = leakfmt.match(line)
if not matches:
print "%s: could not parse line %d, skipping" % (dump_file, line_no)
else:
trace = { "size": int(matches.group(1)),
"address": matches.group(2),
"frames": matches.group(3).strip().split(" ")}
result.append(trace)
return result
def Symbolize(binary, traces):
addresses = set()
for trace in traces:
for frame in trace["frames"]:
addresses.add(frame)
addr_file, addr_filename = tempfile.mkstemp()
for addr in addresses:
os.write(addr_file, "%s\n" % addr)
os.close(addr_file)
syms = subprocess.Popen([
"addr2line", "-f", "-C", "-e", binary, "@%s" % addr_filename],
stdout=subprocess.PIPE).communicate()[0].strip().split("\n")
table = {}
cwd = os.getcwd()
for address, symbol, location in zip(addresses, syms[::2], syms[1::2]):
if location != "??:0":
filename, line = location.split(":")
filename = os.path.realpath(filename)[len(cwd)+1:]
location = "%s:%s" % (filename, line)
table[address] = { "name": symbol, "location": location }
for trace in traces:
frames = []
for frame in trace["frames"]:
frames.append(table[frame])
trace["frames"] = frames
def Main(argv):
if sys.platform != 'linux2':
print 'print-live-objects.py requires addr2line only present on Linux.'
sys.exit(1)
if len(argv) != 3:
usage()
sys.exit(1)
traces = LoadDump(argv[2])
Symbolize(argv[1], traces)
if not traces:
print "No leaks found!"
for trace in sorted(traces, key=lambda x: -x["size"]):
print "Leak of %d bytes at address %s" % (trace["size"], trace["address"])
for frame in trace["frames"]:
print " %s (%s)" % (frame["name"], frame["location"])
print ""
if __name__ == '__main__':
Main(sys.argv)
|
