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blog-post-issues's Introduction

Blog Post

This repo is used for maintenance of https://aben20807.github.io/. The repo of the static website can be accessed at here.

Theme

This theme (hugOuO) of the blog is made up of story by xaprb and AllinOne by Orianna. I have to thank them for providing good themes and giving those MIT license so that I can make good use of.

Blogging!

$ git clone --recursive [email protected]:aben20807/blog-post.git
$ cd blog-post
$ git clone [email protected]:aben20807/aben20807.github.io.git public

Build site locally

  • Install hugo: $ sudo snap install hugo
  • Build on localhost: $ hugo server -D --disableFastRender

Deploy

  • ./deploy.sh

Wishlist

You can submit the issue here.

Tools

hued

  • An editor make you edit the post file easily with completion that skip the middle directories.
  • Notice: some parts are hardcode, for example, the directory is "content/posts/"

Install

  1. Make sure you have bash completion.
$ ls /etc/ | grep --color bash_completion.d
  1. Copy the script file into conpletion directory. (Update)
$ sudo cp hued.sh /etc/bash_completion.d/
  1. Close the current shell and reopen it.

blog-post-issues's People

Contributors

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Forkers

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blog-post-issues's Issues

vim syntax

http://vimcdoc.sourceforge.net/doc/syntax.html#:syn-arguments
https://github.com/vim/vim/tree/master/runtime/syntax

after/syntax/lcc.vim

syn match lccIntType            "int[0-9]*\(\s\|\[\)"me=e-1
syn match lccFloatType          "float[0-9]*\(\s\|\[\)"me=e-1

syn keyword lccSecure           public secure
syn keyword lccPackage          package

syn keyword lccConditional      if else
syn keyword lccRepeat           while for bwhile bfor

syn match lccUserFunction       "\<\h\w*\>\(\s\|\n\)*("me=e-1

hi def link lccIntType          Type
hi def link lccFloatType        Type
hi def link lccSecure           StorageClass
hi def link lccPackage          Include
hi def link lccRepeat           Repeat
hi def link lccConditional      Conditional
hi def link lccUserFunction     Function

call graph

https://stackoverflow.com/a/5373814

static void D() { }
static void Y() { D(); }
static void X() { Y(); }
static void C() { D(); X(); }
static void B() { C(); }
static void S() { D(); }
static void P() { S(); }
static void O() { P(); }
static void N() { O(); }
static void M() { N(); }
static void G() { M(); }
static void A() { B(); G(); }

int main() {
  A();
}
$ vim t.cpp
$ clang++ -S -emit-llvm t.cpp -o - | opt -analyze -dot-callgraph
$ cat callgraph.dot | 
   c++filt | 
   sed 's,>,\\>,g; s,-\\>,->,g; s,<,\\<,g' | 
   awk '/external node/{id=$1} $1 != id' | 
   dot -Tpng -ocallgraph.png
$ eog callgraph.png

callgraph

free cache memory 

$ sudo sh -c 'echo 1 > /proc/sys/vm/drop_caches'
$ sudo sh -c 'echo 2 > /proc/sys/vm/drop_caches'
$ sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'

Install oracle jdk

Ref: https://askubuntu.com/a/55960

Steps

  1. download from official website: https://www.oracle.com/technetwork/java/javase/downloads/index.html
  2. use following commands, if the version is 1.8 then change 7 to 8 below.
tar -xvf jdk-7*
sudo mkdir /usr/lib/jvm
sudo mv ./jdk1.7* /usr/lib/jvm/jdk1.7.0
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.7.0/bin/javaws" 1
sudo chmod a+x /usr/bin/java
sudo chmod a+x /usr/bin/javac
sudo chmod a+x /usr/bin/javaws

bashmarks issue 

bash: /tmp/bashmarks.gnc3m4: cannot overwrite existing file

ohmybash/oh-my-bash#50

$ vim ~/.oh-my-bash/plugins/bashmarks/bashmarks.plugin.sh

     # purge line
-    sed "/$2/d" "$1" > "$t"
+    sed "/$2/d" "$1" >| "$t"
     /bin/mv "$t" "$1"

inputrc 

"\e[A": history-search-backward
"\e[B": history-search-forward

git rebase fix

Scenario:
Find a bug in dev-branch branch.
Create a fix-branch from master, fix it and create PR.
Merge the fix to dev-branch after merging PR to upstream/master.

$ git add .
$ git commit -m "STASH"
$ git checkout master

$ git checkout -b fix-branch
# fix code
$ git add
$ git commit
$ git push origin fix-branch
# Create PR to upstream repo's master
# Wait the merge by reviewer

$ git checkout master
$ git fetch upstream
$ git merge upstream/master
$ git checkout dev-branch
$ git rebase master
$ git push -f origin/dev-branch

perf

Linux性能诊断：perf使用指南

$ gcc -g -ggdb -fno-omit-frame-pointer <target>

$ perf record --call-graph dwarf -g <target>
$ perf script > out.perf
$ ./stackcollapse-perf.pl out.perf > o.folded
$ ./flamegraph.pl o.folded >| o.svg --width 50000

ctypes

C++

  • adder.cc
#include "adder.h"
int add(int a, int b)
{
    return a + b;
}
  • adder.h
extern "C" {
int add(int a, int b);
}

compile command

$ g++ -o libadder.so -shared -fPIC adder.cc

Python

  • caller.py
from ctypes import cdll

adder_lib = cdll.LoadLibrary("libadder.so")
add = adder_lib.add
print(add(1, 3))

emacs

smooth-scrolling

(require 'smooth-scrolling)
(smooth-scrolling-mode 1)
(setq smooth-scroll-margin 5)

universal-ctags

https://github.com/universal-ctags/ctags

$ sudo apt install autoconf automake libtool
$ sudo apt install pkg-config
$ git clone https://github.com/universal-ctags/ctags.git
$ cd ctags
$ ./autogen.sh
$ ./configure --program-prefix=uni
$ make
$ sudo make install
Plug 'majutsushi/tagbar', {'do': 'unictags -R -h \".h .c .hpp .cpp .java .python .y .l\"'}
let g:tagbar_ctags_bin = '/usr/local/bin/unictags'

fzf 

# ref: https://github.com/junegunn/fzf/issues/542#issuecomment-210463399
$ vim $(fzf)

oh-my-bash

install

sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmybash/oh-my-bash/master/tools/install.sh)"

theme

$ mcd .oh-my-bash/themes/ouo
$ vim ouo.theme.sh

# ouo theme
# Author: Huang Po Hsuan
# inspired by theme "pure" "cupcake"

# scm theming
SCM_THEME_PROMPT_PREFIX=""
SCM_THEME_PROMPT_SUFFIX=""

SCM_THEME_PROMPT_DIRTY=" ${bold_red}✗${normal}"
SCM_THEME_PROMPT_CLEAN=" ${green}✓${normal}"
SCM_GIT_CHAR="${green}±${normal}"
SCM_GIT_BEHIND_CHAR="${bold_blue}↓${normal}"
SCM_GIT_AHEAD_CHAR="${bold_blue}↑${normal}"
SCM_GIT_UNTRACKED_CHAR="${bold_blue}⌀${normal}"
SCM_GIT_UNSTAGED_CHAR="${bold_yellow}•${normal}"
SCM_GIT_STAGED_CHAR="${bold_green}+${normal}"

CLOCK_THEME_PROMPT_PREFIX=''
CLOCK_THEME_PROMPT_SUFFIX=' '
THEME_SHOW_CLOCK=true
THEME_CLOCK_COLOR=${THEME_CLOCK_COLOR:-"$green"}
THEME_CLOCK_FORMAT=${THEME_CLOCK_FORMAT:-"[%H:%M]"}

scm_prompt() {
    CHAR=$(scm_char)
    if [ $CHAR = $SCM_NONE_CHAR ]
        then
            return
        else
            echo "[$(scm_prompt_info)]"
    fi
}

rightprompt() {
    printf "%*s" $COLUMNS "$1"
}

ouo_prompt() {
    # ps_host="${bold_blue}\h${normal}";
    # ps_user="${green}\u${normal}";
    # ps_root="${red}\u${red}";
    # ouo="${green}ouo${normal}";
    if [ $? -ne 0 ]
        then
            ps_user_mark="${red}$ ${normal}";
        else
            ps_user_mark="${green}$ ${normal}";
    fi
    ps_root_mark="${green}# ${normal}"
    ps_path="${yellow}\w${normal}"

    # make it work
    # PS1="\n$(clock_prompt)$ps_path $(scm_prompt)"
    PS1L="$ps_path $(scm_prompt)"
    PS1R="$(clock_prompt)"
    # Ref: https://wiki.archlinux.org/index.php/Bash/Prompt_customization#Right-justified_text
    PS1=$(printf "\n$(tput sc; rightprompt $PS1R; tput rc)%s" "$PS1L")

    # case "$HAS_GOTO" in
    #     1) PS1="${PS1}\n${GOTO_PROMPT}"
    #         printf "OuO"
    #         ;;
    # esac

    case $(id -u) in
        # 0) PS1="$ps_root@$ps_host$(scm_prompt):$ps_path\n$ps_root_mark"
        0) PS1="${PS1}\n$ps_root_mark"
            ;;
        # *) PS1="$ps_user@$ps_host$(scm_prompt):$ps_path\n$ps_user_mark"
        *) PS1="${PS1}\n$ps_user_mark"
            ;;
    esac
}

safe_append_prompt_command ouo_prompt

$ vim ~/.bashrc

OSH_THEME="ouo"

GCC 函式追蹤功能

http://blog.linux.org.tw/~jserv/archives/001870.html

use dladdr to show function name
https://unix.stackexchange.com/a/386903

print indent
https://www.dennisthink.com/?p=63

Use to trace C++ function

Makefile:

all:
	g++ -c tracer.c -g
	g++ tracer.o main.cpp -fPIC -ldl -finstrument-functions -export-dynamic -g
clean:
	rm *.out *.o

tracer.c:

#ifdef __cplusplus
extern "C"
{

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dlfcn.h>

    void __cyg_profile_func_enter (void *, void *)
        __attribute__((no_instrument_function));
    void __cyg_profile_func_exit (void *, void *)
        __attribute__((no_instrument_function));

    // extern int trace_on;
    // int trace_on = 1;
}

#endif

#define TRACE_FD 3

static FILE *fp_trace=NULL;
static int nDepth = 0;

void __attribute__((constructor)) traceBegin(void) {
    fp_trace = fopen("func_trace.out", "w");
}

void __attribute__((destructor)) traceEnd(void) {
    if (fp_trace != NULL) {
        fclose(fp_trace);
        fp_trace = NULL;
    }
}

void __cyg_profile_func_enter (void *func,  void *caller)
{
    // if (!trace_on) {
    //     return;
    // }
    nDepth++;
    for(int i = 0 ; i < nDepth ; i++) {
        if(fp_trace) {
            fprintf(fp_trace,"\t");
        }
    }

    Dl_info info;
    if (fp_trace == NULL) {
        fp_trace = fdopen(TRACE_FD, "w");
        if (fp_trace == NULL) abort();
        setbuf(fp_trace, NULL);
    }
    if (dladdr(func, &info)) {
        // fprintf (fp_trace, "in %p [%s] %s\n",
        //         func,
        //         info.dli_fname ? info.dli_fname : "?",
        //         info.dli_sname ? info.dli_sname : "?");
        fprintf (fp_trace, "in [%s] %s\n",
                info.dli_fname ? info.dli_fname : "?",
                info.dli_sname ? info.dli_sname : "?");
    }
}

void __cyg_profile_func_exit(void *func, void *caller)
{
    // if (!trace_on) {
    //     return;
    // }
    for(int i = 0 ; i < nDepth ; i++) {
        if(fp_trace) {
            fprintf(fp_trace,"\t");
        }
    }
    nDepth--;

    Dl_info info;
    if (fp_trace == NULL) {
        fp_trace = fdopen(TRACE_FD, "w");
        if (fp_trace == NULL) abort();
        setbuf(fp_trace, NULL);
    }
    if (dladdr(func, &info)) {
        // fprintf (fp_trace, "out %p [%s] %s\n",
        //         func,
        //         info.dli_fname ? info.dli_fname : "?",
        //         info.dli_sname ? info.dli_sname : "?");
        fprintf (fp_trace, "out [%s] %s\n",
                info.dli_fname ? info.dli_fname : "?",
                info.dli_sname ? info.dli_sname : "?");
    }
}

main.cpp:

#include <iostream>
#include <cstdio>
#include <cstdlib>
extern int traceon;
// int trace_on = 1;

using namespace std;

int bar(float f) {
    printf("%f\n", f);
}

void foo(int a) {
    printf("%d\n", a);
    bar(4.4);
}

int main()
{
    puts("c++");
    foo (3);
    puts("gg");
    return 0;
}

func_trace.out:

	in [./a.out] ?
		in [./a.out] ?
		out [./a.out] ?
	out [./a.out] ?
	in [./a.out] main
		in [./a.out] _Z3fooi
			in [./a.out] _Z3barf
			out [./a.out] _Z3barf
		out [./a.out] _Z3fooi
	out [./a.out] main

ubuntu ime 

$ sudo apt install fcitx-bin fcitx-chewing
$ im-config

W: GPG error 

W: GPG error: file:/var/cuda-repo-10-0-local-10.0.130-410.48  Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F60F4B3D7FA2AF80

Ref: NVIDIA/nvidia-docker#571 (comment)
screenshot from 2019-01-03 21-55-40

$ sudo vim /etc/apt/sources.list.d/cuda.list

screenshot from 2019-01-03 21-55-57

deb https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64 /

screenshot from 2019-01-03 22-05-47

$ wget -qO - https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/7fa2af80.pub | sudo apt-key add -

screenshot from 2019-01-03 22-00-03

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