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#!/usr/bin/env python
#
# Copyright (C) 2022 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""Trace parser for f2fs traces."""
import collections
import re
# ex) bt_stack_manage-21277 [000] .... 5879.043608: f2fs_datawrite_start: entry_name /misc/bluedroid/bt_config.bak.new, offset 0, bytes 408, cmdline bt_stack_manage, pid 21277, i_size 0, ino 9103
RE_WRITE_START = r".+-([0-9]+).*\s+([0-9]+\.[0-9]+):\s+f2fs_datawrite_start:\sentry_name\s(\S+)\,\soffset\s([0-9]+)\,\sbytes\s([0-9]+)\,\scmdline\s(\S+)\,\spid\s([0-9]+)\,\si_size\s([0-9]+)\,\sino\s([0-9]+)"
# ex) dumpsys-21321 [001] .... 5877.599324: f2fs_dataread_start: entry_name /system/lib64/libbinder.so, offset 311296, bytes 4096, cmdline dumpsys, pid 21321, i_size 848848, ino 2397
RE_READ_START = r".+-([0-9]+).*\s+([0-9]+\.[0-9]+):\s+f2fs_dataread_start:\sentry_name\s(\S+)\,\soffset\s([0-9]+)\,\sbytes\s([0-9]+)\,\scmdline\s(\S+)\,\spid\s([0-9]+)\,\si_size\s([0-9]+)\,\sino\s([0-9]+)"
MIN_PID_BYTES = 1024 * 1024 # 1 MiB
SMALL_FILE_BYTES = 1024 # 1 KiB
class ProcessTrace:
def __init__(self, cmdLine, filename, numBytes):
self.cmdLine = cmdLine
self.totalBytes = numBytes
self.bytesByFiles = {filename: numBytes}
def add_file_trace(self, filename, numBytes):
self.totalBytes += numBytes
if filename in self.bytesByFiles:
self.bytesByFiles[filename] += numBytes
else:
self.bytesByFiles[filename] = numBytes
def dump(self, mode, outputFile):
smallFileCnt = 0
smallFileBytes = 0
for _, numBytes in self.bytesByFiles.items():
if numBytes < SMALL_FILE_BYTES:
smallFileCnt += 1
smallFileBytes += numBytes
if (smallFileCnt != 0):
outputFile.write(
"Process: {}, Traced {} KB: {}, Small file count: {}, Small file KB: {}\n"
.format(self.cmdLine, mode, to_kib(self.totalBytes), smallFileCnt,
to_kib(smallFileBytes)))
else:
outputFile.write("Process: {}, Traced {} KB: {}\n".format(
self.cmdLine, mode, to_kib(self.totalBytes)))
if (smallFileCnt == len(self.bytesByFiles)):
return
sortedEntries = collections.OrderedDict(
sorted(
self.bytesByFiles.items(), key=lambda item: item[1], reverse=True))
for i in range(len(sortedEntries)):
filename, numBytes = sortedEntries.popitem(last=False)
if numBytes < SMALL_FILE_BYTES:
# Entries are sorted by bytes. So, break on the first small file entry.
break
outputFile.write("File: {}, {} KB: {}\n".format(filename, mode,
to_kib(numBytes)))
class UidTrace:
def __init__(self, uid, cmdLine, filename, numBytes):
self.uid = uid
self.packageName = ""
self.totalBytes = numBytes
self.traceByProcess = {cmdLine: ProcessTrace(cmdLine, filename, numBytes)}
def add_process_trace(self, cmdLine, filename, numBytes):
self.totalBytes += numBytes
if cmdLine in self.traceByProcess:
self.traceByProcess[cmdLine].add_file_trace(filename, numBytes)
else:
self.traceByProcess[cmdLine] = ProcessTrace(cmdLine, filename, numBytes)
def dump(self, mode, outputFile):
outputFile.write("Traced {} KB: {}\n\n".format(mode,
to_kib(self.totalBytes)))
if self.totalBytes < MIN_PID_BYTES:
return
sortedEntries = collections.OrderedDict(
sorted(
self.traceByProcess.items(),
key=lambda item: item[1].totalBytes,
reverse=True))
totalEntries = len(sortedEntries)
for i in range(totalEntries):
_, processTrace = sortedEntries.popitem(last=False)
if processTrace.totalBytes < MIN_PID_BYTES:
# Entries are sorted by bytes. So, break on the first small PID entry.
break
processTrace.dump(mode, outputFile)
if i < totalEntries - 1:
outputFile.write("\n")
class AndroidFsParser:
def __init__(self, re_string, uidProcessMapper):
self.traceByUid = {} # Key: uid, Value: UidTrace
if (re_string == RE_WRITE_START):
self.mode = "write"
else:
self.mode = "read"
self.re_matcher = re.compile(re_string)
self.uidProcessMapper = uidProcessMapper
self.totalBytes = 0
def parse(self, line):
match = self.re_matcher.match(line)
if not match:
return False
try:
self.do_parse_start(line, match)
except Exception:
print("cannot parse: {}".format(line))
raise
return True
def do_parse_start(self, line, match):
pid = int(match.group(1))
# start_time = float(match.group(2)) * 1000 #ms
filename = match.group(3)
# offset = int(match.group(4))
numBytes = int(match.group(5))
cmdLine = match.group(6)
pid = int(match.group(7))
# isize = int(match.group(8))
# ino = int(match.group(9))
self.totalBytes += numBytes
uid = self.uidProcessMapper.get_uid(cmdLine, pid)
if uid in self.traceByUid:
self.traceByUid[uid].add_process_trace(cmdLine, filename, numBytes)
else:
self.traceByUid[uid] = UidTrace(uid, cmdLine, filename, numBytes)
def dumpTotal(self, outputFile):
if self.totalBytes > 0:
outputFile.write("Traced system-wide {} KB: {}\n\n".format(
self.mode, to_kib(self.totalBytes)))
def dump(self, uid, outputFile):
if uid not in self.traceByUid:
return
uidTrace = self.traceByUid[uid]
uidTrace.dump(self.mode, outputFile)
def to_kib(bytes):
return bytes / 1024
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