Makistos’s gists

Makistos / flatten.py

Created June 27, 2016 12:43

Flattening a list in Python. #python

	def flatten(coll):
	for i in coll:
	if isinstance(i, (list, tuple)):
	for j in flatten(i):
	yield j
	else:
	yield i

Makistos / median.py

Created June 16, 2016 06:42

Calculating the median from a list in Python. #python

	def median(l):
	sortedl = sorted(l)

	mid = (len(sortedl) -1) // 2

	if (len(sortedl)) % 2:
	return (sortedl[mid] + sortedl[mid+1]) / 2.0
	else:
	return sortedl[mid]

Makistos / stacktrace.java

Last active March 22, 2017 08:00

Printing stack trace in Android. #java

	// Get stacks for every thread
	import java.util.*;

	Map<Thread, StackTraceElement[]> map = Thread.getAllStackTraces();
	for (Thread key : map.keySet()) {
	for (StackTraceElement ste : map.get(key)) {
	Log.e(TAG, "TRACE: (" + key.toString() + ":" + key.getId() + ") " + ste);
	}
	}

Makistos / debug.md

Last active June 8, 2016 08:11

Linux debugging tips.

kernel_variant.xml:

CONFIG_DYNAMIC_DEBUG=y
CONFIG_PRINTK_TIME=y
CONFIG_LOG_BUF_SHIFT=18
CONFIG_KALLSYMS=y

Makistos / dtparser.py

Created April 28, 2016 07:49

Print Linux Device Tree and optionally search for strings within that tree. Requires the top level dts file as input. #linux #python

	#!/usr/bin/python

	from __future__ import print_function
	import os, sys, getopt

	searchstring = ""


	def usage():
	print (os.path.basename(sys.argv[0]) + ' [-s search_string] -i <inputfile>')

Makistos / dex2oatsum.

Last active June 8, 2016 08:12

Calculating how long dex2oat takes time on Android boot. Log is created with adb logcat -v threadtime > logcat.log. #bash #awk

grep "dex2oat took" logcat.log | sed 's/\ms//g' | column -t -s ' ' | gawk '{ sum += $10 }  END { print sum}'

Makistos / Doxyfile

Created March 9, 2016 10:18

General Doxyfile for studying C code (inlined source, statics included, etc). Requires dot and mscgen. #doxygen #c

	# Doxyfile 1.8.6

	# This file describes the settings to be used by the documentation system
	# doxygen (www.doxygen.org) for a project.
	#
	# All text after a double hash (##) is considered a comment and is placed in
	# front of the TAG it is preceding.
	#
	# All text after a single hash (#) is considered a comment and will be ignored.
	# The format is:

Makistos / thread_trace.c

Last active April 6, 2016 05:36

These definitions can be used to trace threaded applications. Add ENTER; at the beginning and END; at the end of any functions you wish to trace. You will get prints when the function is entered and exited along with a microsecond timestamp and thread id. Note that printf() isn't probably the best function to use, for instance in Android I used …

	#include <time.h>

	unsigned long us_time()
	{
	struct timeval tv;
	gettimeofday(&tv, NULL);
	return tv.tv_sec*(uint64_t)1000000+tv.tv_usec;
	}
	#define ENTER printf("%ld enter %s (%d)\n", us_time(), __FUNCTION__, gettid())
	#define EXIT printf("%ld exit %s (%d)\n", us_time(), __FUNCTION__, gettid())

Makistos / git-repo-statuses.sh

Last active December 18, 2022 07:01

Get a nice list of git repository statuses using the repo tool. #repo #git #git-status

	# Get a list of all the repos
	repo forall -c 'echo $REPO_PROJECT; git status -s'

	# Just list the changed repos
	repo forall -c 'if [ "$(git status --porcelain)" != "" ]; then echo $REPO_PROJECT; fi'

	# Print the contents, also only include projects from given list
	repo forall $(cat projects) -c 'if [ "$(git status --porcelain)" != "" ]; then echo $REPO_PROJECT; git status -s; fi'

	# Check both branch and (un)staged commits

Makistos / rm-kernel.sh

Created February 11, 2016 13:34

Remove oldest Linux kernel and associated packages if there are more than two available. #bash #linux #bash-select #kernel

	#!/bin/bash

	KERNELS=`ls /boot \| grep vmlinuz \| cut -d'-' -f2,3`
	echo Available kernels: $KERNELS
	KERNCOUNT=`echo $KERNELS \| wc -w`
	if [ $KERNCOUNT -gt 2 ];
	then
	OLDEST=`echo "${KERNELS%% *}" \| head -1`
	PACKAGES=`dpkg -l \| grep ^ii \|grep $OLDEST \| awk -F' ' '{ print $2 }'`
	echo "Oldest package (to be removed): $OLDEST"

Marko Makistos