2014年7月16日
摘要: 檢查宏定義
WIN32
_DEBUG
_WINDOWS
_USRDLL
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GDB筆記
概覽
基礎
用戶態會話
調試模式
3種調試已有進程
gdb exe
.
gdb –args exe [args]
.
gdb
file exe
run [args]
.
gdb –args gcc a.c -o a
命令行參數
show args
set args 多次運行設置命令行參數
環境變量和執行路徑
path directory
.
show paths
.
show environment [varname]
.
set environment varname[=value] 清除或者設置環境變量
工作目錄
繼承進入gdb工作目錄
改變工作目錄
cd dirctory
顯示路徑
pwd
輸入輸出
info terminal
run > a.txt
tty /dev/ttyb
遠程調試可用這些輔助。
inferior 下層 多個進程調試
inferior gdb維護的一系列對象，每個inf對應一個調試目標進程。
info inferior 顯示下層信息
NULL 程序沒有跑或者已經終止
clone-inferior -copies 2 復制當前下層2份
(gdb) info inferiors
Num Description Executable
* 1 process 10087 /home/gao/code/a
(gdb) clone-inferior -copies 2
Added inferior 2.
Added inferior 3.
(gdb) info inferiors
Num Description Executable
3 程序沒有跑或者已經終止 /home/gao/code/a
2 /home/gao/code/a
* 1 process 10087 /home/gao/code/a
(gdb)
切換下程
inferior 2 切換2這個下程。
進程號是0，沒開始運行。
run 運行起來。
.
增加一個運行下層
add-inferior -exec executeable 增加一個運行下層
比如說調試一個服務端程序，一個客戶端程序。
remove-inferior n 刪掉一個下層
detach inferior 繼續運行 quit
kill inferior 調試進程退了，但是inferior紀錄還在。
Tab 幫助
(gdb) remove-
remove-inferiors remove-symbol-file
(gdb) remove-
remove-inferiors remove-symbol-file
(gdb) remove-
file 命令
file a.exe 可自行文件和符號文件是一個文件
可自行文件和符號文件分開
exec-file 指定目標文件
.
symbol-file 指定符號文件
run 開始運行
可以支持 run > >> < 重定向
set args 清理命令行參數
附加到進程
gdb –pid= pid
attach pid
終止調試進程
detach pid 分離進程繼續運行
.
quit 進程退出
.
q
ctrl + D
執行控制
斷點
軟件斷點
break 普通
tbreak 一次性
rbreak 正則表達式一批斷點
- 基于cpu斷點指令，x86 int3機器碼0xcc。
- 替換斷點位置的指令
- CPU自執行這里觸發斷點異常。
- 沒有斷點數量限制。
硬件斷點
- 基于cpu調試寄存器，dr0～dr7，數量限制。x86可以設定4個斷點。數量限制。
- 不修改代碼，在只讀內存上設置斷點。EEPROM上的代碼設置。
- 有數量限制。
location
- 行號
- －／＋ 偏移
- 文件名 ：行號
- 函數名
- 函數:標號
- 文件名：函數
標號
- -source linename
- -function function
- -label label
-line number
- address location
break * address
實踐
file banner
b main 中斷在main函數
info funciton useage 顯示useage函數地址
info *0x88888e4 直接寫地址設定斷點
info b 顯示所有斷點
list usage 顯示useage函數
b line.c:11
b +2 當前顯示到14行＋2行所以設定在17行
虛擬機設定硬件斷點會失敗.
(gdb)hbreak hd_ioctl
(gdb) info b
物理機可以設定.
(gdb) hbreak v
Hardware assisted breakpoint 2 at 0x40053a: v. (2 locations)
(gdb) info b
Num Type Disp Enb Address What
1 breakpoint keep y
breakpoint already hit 1 time
1.1 y 0x000000000040054f in main at a.c:10 inf 1
1.2 y 0x000000000040054f in main at a.c:10 inf 2
2 hw breakpoint keep y
2.1 y 0x000000000040053a in v at a.c:4 inf 1
2.2 y 0x000000000040053a in v at a.c:4 inf 2
(gdb)
管理斷點
info b 顯示斷點
delete 1 刪除
disable 1
enable 1
delete 刪除所有的斷點
clear sum 刪除sum函數入口的所有斷點
擴展斷點
watchpoint 監視一個表達式，值變化中斷。
watch a＊b＋c／d
watch *( int * )
watch fd 監控局部變量fd
c 繼續運行
info b //
注意，x86硬件調試，寫操作，執行過這一行，gdb顯示下一行，要看上一行。hw watchpoint，在x86平臺wachtpoint基于硬件實現，其他平臺可能是基于軟件實現。 vc6純軟件執行，執行目標速度低。
執行位置超過當前區域，無效監視點會被刪除。
訪問監視點
rwatch 讀停下來。
awatch 讀或寫停下來。 awatch fd
watch -l
b hd_ioctl thread 1
info threads 帶＊ 當前線程
繁忙函數解決方案
b hd_ioctl thread 1 if fd > 0
當斷點，斷了后執行命令
()command 12
()silent
()print “fd is %d\n”,fd
()continue
()end
動態ping不修改代碼。
tracepoint 遠程主機通訊調試，前端stub立刻恢復執行，但會記錄下來。
catchpoint
執行控制
進入子函數內部。單步 step
匯編 stepi
stepi 4
類似nexti
不要進入子函數
next
繼續執行
continue
跑起來直到3號斷點命中
until 3
跑起來直到3號斷點命中，快捷禁止其他斷點。
恢復執行直到函數返回。
finish
調用函數！
gdb 杜撰代碼調用函數。
call sum（1，2） …
強制返回
強制main函數 return。
return 1
觸發中斷
異常或斷點進入調試器。
調試器發起中斷，讓程序中斷下來。ctrl＋C，app收到中斷信號，進入調試器。
符號
調試器讀區 調試符號。
二進制－調試符號－源碼
linux dwarf 存儲調試符號信息。gcc
readelf -h filename
里面如果有line location debug標示
readelf -w 導出調試文件
gcc -g 才能輸出符號
ubuntu 符號服務器
< ddebs.ubuntu.com/pool/main/>
分離操作
strip
安裝ubunte的linux 內核符號
https://askubuntu.com/questions/197016/how-to-install-a-package-that-contains-ubuntu-kernel-debug-symbols
安裝libc符號
dpkg -s /lib/x86_64-linux-gun/libc-2.15.so
dpkg -s libc.so.6
sudo apt-get -c aptproxy.conf install libc6-dbg
libc 調試符號
sudo apt-get install libc6-dbg
符號路徑
gdb 使用file 或 symbol－file 加載符號文件
自動搜索 path 路徑
（gdb）i share
* 共享庫沒調試信息
搜索符號
info vaiables regex 類名／函數名／變量名
內存地址與符號互換
info addriess 函數名
info symbol 地址
(gdb) info address main
Symbol “main” is a function at address 0x400547.
(gdb) info symbol 0x400547
main in section .text of /home/gao/code/a
.
info os
查看加載的文件內存位置
info files
列出全局變量
info variable
info va
顯示源碼
list
list -
dir 源碼路徑
show dir
常用命令源碼
安裝系統工具源碼和調試
apt-get source coreutils
sudo apt-get install coreutils-dbgsym
gdb /bin/ls
list main
dir ~/src/coreutils-7.4/src
list main
libc
sudo apt-get source libc6-dev
/home/ge/eglibc-2.15
dir 搜索路徑 ：分割
$cdir 編譯路徑
cwd 當前工作路徑
查看調試目標
觀察寄存器
info reg
棧
子函數返回地址
函數參數
局部變量
bt n 觀察函數返回地址
frame n 切換棧幀
up n
down n
info frame ［address］
info args
info locals
注意，切換棧幀之后可能會發生，本地變量值不準確，因為值存在寄存器中需要小心。
觀察內存
print
p /f 表達式 表達式要打印位置
xduotcf
x
x /Nuf
N 打印幾個單元
u 每個單元大小 b-1byte w-2byte h-4byte g-8byte
f s字符串i指令格式
x/s 0xfffff81946000 打印字符串
x /32bx arg bit 16禁制
(gdb) x /32bx &i
0x7fffffffc76c: 0x01 0x00 0x00 0x00 0x70 0x05 0x40 0x00
0x7fffffffc774: 0x00 0x00 0x00 0x00 0x40 0xfa 0xa2 0xf7
0x7fffffffc77c: 0xff 0x7f 0x00 0x00 0x58 0xc8 0xff 0xff
0x7fffffffc784: 0xff 0x7f 0x00 0x00 0x58 0xc8 0xff 0xff
(gdb)
p arg[0]
p arg[i]
p *&a[0]@10 a0數組開始的10個元素
反匯編
disas main main反匯編代碼
x/5i schedule 這個地址開始的5條匯編指令。
gdb mov 從左往右賦值at&t匯編。
高級技巧
信號
stop 要不要中斷下來看
printf 打印信息
pass 要不要傳遞給應用程序。
- handle 修改規則
handle signal act
print
noprint
stop
nostop
pass
nopass
handle SIGPIPE 不要中斷下來，打印一個信息，網絡程序常用
(gdb) handle SIGPIPE nostop
Signal Stop Print Pass to program Description
SIGPIPE No Yes Yes Broken pipe
Thread
info threads
LWP－light weight process 線程編號。
* gdb當前線程
切換當前線程
thread 2
打印所有線程
thread apply all bt 針對一群線程的命令避免切換來看。
線程改名字
thread name ［name］
我自己經驗 LWP 可以很好的觀察線程負載情況。
摘要: 繪圖控件重繪->其他操作->繪圖控件重繪
進入了這樣一個死循環,函數堆棧空間分配不足夠.
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eclipse 配置遇到 object 找不到問題 ?The type java.lang.object cannot be resolved - Eclipse buildpath not working
因為替換了 jvm版本.
解決辦法: build->library -> add library->add jre library.tomcat部署問題.?1.清理 部署 重啟. 2.先刪掉部署項目,可以重新配置config.tomcat 找不到oracle 驅動程序?Tomcat error: java.sql.SQLException: No suitable driver found for jdbc
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<ResourceLink global="jdbc/oracle" name="jdbc/oracle" type="javax.sql.DataSource"/>
在 server.xml <Resource
name="jdbc/oracle"
auth="Container"
type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"
driverClassName="oracle.jdbc.OracleDriver"
url="jdbc:oracle:thin:@10.243.140.111:1521:test"
username="core"
password="core"/>
eclipse 項目屬性, web deployment assembly設置 source: /webcontent deploypath: /
tomcat 開啟gzip壓縮
http://blog.csdn.net/hbcui1984/article/details/5666327
Setting property 'source' to 'org.eclipse.jst.jee.server 這個不是問題.
解決Setting property 'source' to 'org.eclipse.jst.jee.server的問題.
http://blog.csdn.net/foreversilent/article/details/11147847
測試代碼的locality。
數組的讀區方式不同，按照行讀，被cache也是按行連續加載的。
如果按照列讀區，那么效率很低，除非cache足夠大，而且也要遍歷所有的數據，并且cache hash算法也好，實現的硬件還是多路組相聯的cache硬件實現。
** valgrind --tool=cachegrind ./test2**
code1:
#include <stdio.h>
#define MAXROW 8000
#define MAXCOL 8000
int main () {
int i,j;
static int x[MAXROW][MAXCOL];
printf ("Starting!\n");
for (i=0;i<MAXROW;i++)
for (j=0;j<MAXCOL;j++)
x[i][j] = i*j;
printf("Completed!\n");
return 0;
}
code2:
#include <stdio.h>
#define MAXROW 8000
#define MAXCOL 8000
int main () {
int i,j;
static int x[MAXROW][MAXCOL];
printf ("Starting!\n");
for (j=0;j<MAXCOL;j++)
for (i=0;i<MAXROW;i++)
x[i][j] = i*j;
printf("Completed!\n");
return 0;
}
```
##結果
Command: ./test1
Starting!
Completed!
I refs: 905,721,688
I1 misses: 4,177
LLi misses: 2,808
I1 miss rate: 0.00%
LLi miss rate: 0.00%
D refs: 514,830,867 (386,118,735 rd + 128,712,132 wr)
D1 misses: 4,025,828 ( 23,565 rd + 4,002,263 wr)
LLd misses: 4,008,456 ( 6,997 rd + 4,001,459 wr)
D1 miss rate: 0.8% ( 0.0% + 3.1% )
LLd miss rate: 0.8% ( 0.0% + 3.1% )
LL refs: 4,030,005 ( 27,742 rd + 4,002,263 wr)
LL misses: 4,011,264 ( 9,805 rd + 4,001,459 wr)
LL miss rate: 0.3% ( 0.0% + 3.1% )
gcc -o test2 test2.c
** valgrind --tool=cachegrind ./test2**
I refs: 905,720,801
I1 misses: 4,113
LLi misses: 2,811
I1 miss rate: 0.00%
LLi miss rate: 0.00%
D refs: 514,830,348 (386,118,427 rd + 128,711,921 wr)
D1 misses: 64,025,705 ( 23,462 rd + 64,002,243 wr)
LLd misses: 4,016,427 ( 6,977 rd + 4,009,450 wr)
D1 miss rate: 12.4% ( 0.0% + 49.7% )
LLd miss rate: 0.8% ( 0.0% + 3.1% )
LL refs: 64,029,818 ( 27,575 rd + 64,002,243 wr)
LL misses: 4,019,238 ( 9,788 rd + 4,009,450 wr)
LL miss rate: 0.3% ( 0.0% + 3.1% )
Starting!
Completed!
```
參考：
valgrind調試CPU緩存命中率和內存泄漏
http://laoxu.blog.51cto.com/4120547/1395236
摘要: <未完成>
容錯系統的研究.
豆瓣可以搜索幾本書.
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摘要: wget https://raw.github.com/trapd00r/LS_COLORS/master/LS_COLORS -O $HOME/.dircolors
echo 'eval $(dircolors -b $HOME/.dircolors)' >> $HOME/.bashrc
. $HOME/.bashrc
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摘要: typedef struct AA
{
AA * ptr;
}AA ;
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摘要: EXEC sp_configure 'remote query timeout', 0 ;
GO
RECONFIGURE ;
GO
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摘要: 1. 用戶提交
2. 有1/3重做日志緩沖區未被寫入磁盤
3. 有大于1M的重做日志緩沖區未被寫入磁盤
4. 每隔3 秒鐘
5. DBWR 需要寫入的數據的SCN大于LGWR記錄的SCN，DBWR 觸發LGWR寫入。
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摘要: time dd if=/dev/zero bs=1024 count=1000000 of=./1Gb.file
dd if=./1Gb.file bs=64k |dd of=/dev/null
dd if=./1Gb.file bs=1MB |dd of=/dev/null
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摘要: mac為什么主機名.local
搞不清楚為什么.也許區分本地網絡,進程間通訊優化? 為了程序方便 /ect/hosts 添加127.0.0.1 指向主機名.
sudo vim /etc/hosts
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摘要: #ifdef WIN32
WSADATA wsa_data;
WSAStartup(0x0201, &wsa_data);
#endif
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摘要: 在windows上編譯openssl 和 libevent.
libevent-2.0.22-stable
openssl-1.0.2c
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libevent windows構建
warning LNK4098: 默認庫“LIBCMT”與其他庫的使用沖突
問題原因:
exe 是debug版本.
靜態庫是release版本.
編譯libevent
C:\dev\mylibevent\libevent-2.0.22-stable>nmake /f Makefile.nmake
原來的修改 relase 版本多線程靜態庫 CFLAGS= /MT
編譯的時候需要配置合適的線程庫
拷貝出一個Makefile_D.nmake 多線程debug靜態庫
CFLAGS= .... /MTd
工程中鏈接對應的版本的lib文件.
參考:
https://msdn.microsoft.com/zh-cn/library/vstudio/abx4dbyh(v=vs.110).aspx
http://www.cnblogs.com/luxiaoxun/p/3603399.html
http://zyan.cc/libevent_windows/
摘要: 高性能Linux服務器構建實戰：運維監控、性能調優與集群應用
構建高可用Linux服務器 2
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摘要: 1.網絡io文件大小未定,作為類庫的設計者.
小文件太多,不好.IO性能差.
單個文件太大,如果都用memorybuffer,內存占用會非常的大.
設計者考慮2邊的靈活性.
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摘要: 8.8.8.8
114.114.114.114
223.5.5.5
223.6.6.6
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摘要: xee下載地址
https://code.google.com/p/xee/downloads/detail?name=Xee2.2.zip&can=1&q=
自己開了一個分支
https://github.com/gddg/xee
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摘要: 0.1000M 網絡.
1.8口交換機
2.支持vlan
3.支持Qos
4.支持端口聚合.
Cisco SG200-08
5.POE 通過網線供電給USB CAM 功能.
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Error running 'requirements_debian_libs_install gawk libreadline6-dev libssl-dev libyaml-dev libsqlite3-dev sqlite3 autoconf libgdbm-dev libncurses5-dev automake libtool',
showing last 15 lines of /home/gao/.rvm/log/1431136216_ruby-2.2.2/package_install_gawk_libreadline6-dev_libssl-dev_libyaml-dev_libsqlite3-dev_sqlite3_autoconf_libgdbm-dev_libncurses5-dev_automake_libtool.log
sudo：/var/lib/sudo 對非所有者可寫(040777)，模式應該為 0700
對不起，請重試。
正在讀取軟件包列表...
正在分析軟件包的依賴關系樹...
正在讀取狀態信息...
有一些軟件包無法被安裝。如果您用的是 unstable 發行版，這也許是
因為系統無法達到您要求的狀態造成的。該版本中可能會有一些您需要的軟件
包尚未被創建或是它們已被從新到(Incoming)目錄移出。
下列信息可能會對解決問題有所幫助：
下列軟件包有未滿足的依賴關系：
libssl-dev : 依賴: libssl1.0.0 (= 1.0.1f-1ubuntu2) 但是 1.0.1f-1ubuntu2.4 正要被安裝
E: 無法修正錯誤，因為您要求某些軟件包保持現狀，就是它們破壞了軟件包間的依賴關系。
++ return 100
++ return 100
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
解決辦法?
Jumping Into C++ 完整英文版
http://vdisk.weibo.com/s/lFnhClqHrmi
摘要: http://askubuntu.com/questions/50704/sudo-error-is-mode-0777-should-be-0440
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摘要: iconv -f gb2312 -t utf-8 20150422_0.log >>a.log
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摘要: echo "IRB.conf[:PROMPT_MODE] = :DEFAULT" > ~/.irbrc
或
echo "IRB.conf[:PROMPT_MODE] = :SIMPLE" > ~/.irbrc
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摘要: 非常喜歡的一篇文章.介紹了execption c# 設計思路.
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摘要: vim ~/.bash_profile
alias ls='ls -F'
alias cls='clear'
alias grep='grep --color=auto'
CLICOLOR="xterm-color"
LSCOLORS="gxfxcxdxcxegedabagacad"
export CLICOLOR LsCOLORS
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摘要: 這個終端主題顏色配置很舒服.各種軟件對應的主題都有.
http://ethanschoonover.com/solarized/files/solarized.zip
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摘要: 技術樹概覽
http://html5ify.com/fks/#index_內容貢獻者
前端文摘：Web 開發模式演變歷史和趨勢
http://www.cnblogs.com/lhb25/p/web-development-mode-evolve.html
A brief history of web design for designers
http://blog.froont.com/brief-history-of-web-design-for-designers/
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摘要: http://tonybai.com/2010/12/14/create-libraries-with-libtool/
使用 GNU Libtool 創建庫
https://www.ibm.com/developerworks/cn/aix/library/1007_wuxh_libtool/
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摘要: Git Community Book 中文版
http://gitbook.liuhui998.com/1_1.html
臺灣ihower寫的
https://ihower.tw/git/
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摘要: Ruby on Rails 實戰聖經
https://ihower.tw/rails4/
笨方法學 Ruby
http://lrthw.github.io/
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摘要: brew install coreutils
gun tools 替換掉osx
PATH="/usr/local/opt/coreutils/libexec/gnubin:$PATH"
MANPATH="/usr/local/opt/coreutils/libexec/gnuman:$MANPATH"
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摘要: 下載key替換工具 karabiner
control_L to command_L
option_R to delete
FN 鍵盤＋F1 F2 如果你想替換成直接按F1就調用的話，可以macosx 鍵盤里面找到。發現FN鍵盤無法移到別的鍵上。
目前還沒看出來mac上option，control 鍵的原生用途。
鍵程和windows很不一樣。
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摘要: brew install libtool
brew install autoconf
brew install automake
glibtool --help
sh autogen.sh
./configure
make
make check
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摘要: Docroot is: /usr/local/var/www
/usr/local/etc/nginx/nginx.conf to 8080
ln -sfv /usr/local/opt/nginx/*.plist ~/Library/LaunchAgents
nginx
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摘要: chmod -R 777 /usr/local/
GMac:~ XXXX$ brew install cmake
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摘要: pmset -g
sudo pmset -a hibernatemode 3
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摘要: Go to System Preferences -> Keyboard -> Keyboard tab -> Modifier keys
Swap the Control and Cmd keys
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摘要: 目前知名的mq ：
zeromq -- c++ 實現
ActiveMQ
JMS －－ java的消息服務,j2ee 各家實現不同
MS Queue －－
RabbitMQ
nanomsg
lightq
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摘要: Sublime Text 2
安裝插件：
https://gitcafe.com/ghosTM55/sublime-config
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1.vc 編譯
頭文件
#include <omp.h
omp_set_num_threads(threadNumber);
#pragma omp parallel default(shared) private(i,riskId)
{
#pragma omp for
}
}
GCC配置
1. 編譯
-fopenmp
設定線程數量 export OMP_NUM_THREADS=6
參考
通過 GCC 學習 OpenMP 框架
http://www.ibm.com/developerworks/cn/aix/library/au-aix-openmp-framework/
摘要: SQLnet.ora
DIAG_ADR_ENABLED=OFF
DIAG_SIGHANDLER_ENABLED=FALSE
DIAG_DDE_ENABLED=FALSE
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摘要: 1.ms sql 的配置
安裝了 sql- server2005 express ,安裝默認會關閉網絡連接的等.需要打開ip:1433端口.
賬戶密碼需要使用,ms sql–server 登錄登錄.
2.sqlapi 的使用.
正確的sqlapi ++ ms sql server 串
char * dbname = "127.0.0.1\\SQL2005EXPRESS@master";
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摘要: typedef unsigned short WORD;
#define WORD unsigned short
沖突
解決辦法:
1.因為2個頭文件來自不同項目. 修改源文件徹底解決掉這個問題.
2.先后引用位置 .
3.隱藏不必要的 .h文件,只有需要cpp才添加h引用.這樣防止不必要的引用.
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摘要: 關閉oracle api 異常偵測 sqlnet.ora
DIAG_ADR_ENABLED=FALSE
DIAG_DDE_ENABLED=FALSE
DIAG_SIGHANDLER_ENABLED=FALSE
DIAG_RESTRICTED=FALSE
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打開root 用戶
http://www.macx.cn/thread-2051799-1-1.html
http://support.apple.com/zh-cn/HT1528
太難找了，竟然在菜單里，打開root 。
su root
whoami
sudo su
密碼不對
Mac OS X：sudo 命令需要非空的管理員密碼
c# oledb odbc foxpro driver win 64 驅動不兼容.
解決辦法:
c#工程里面選擇 x86.
安裝foxpro odbc驅動.
Intellij IDEA和Android Studio默認使用JDK6，所以你有如下選擇：
1，安裝JDK6
2，安裝其他版本的JDK，然后修改IDE的指向。
如果選擇2，那么修改方式為：
打開應用的.app包，然后在Contents這個目錄下，有個文件info.plist，修改JVMVersion這個key對應的value，從1.6*修改為你安裝的版本即可。
1 用文本編輯器打開
/Applications/IntelliJ IDEA 13.app/Contents/Info.plist
2 搜索JVMVersion，將其值改為1.7*
3 再次運行應用即可看到應用成功運行
from ：
http://www.zhihu.com/question/26086376
摘要: 分析表空間
execute dbms_stats.gather_schema_stats('CORE');
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摘要: 1.種方法
#define WIN32_LEAN_AND_MEAN
放在windows.h 之前.
2. 先引入socket2.h文件.
3. 項目 -> 屬性 -> C/C++ -> 預處理器 -> 預處理器定義
在其中添加 ： WIN32_LEAN_AND_MEAN
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linux DNS 設置
sudo vim /etc/resolv.conf
http://www.alidns.com/setup/#linux
wget http://www.alidns.com/static/soft/SetAliDNS.sh -O SetAliDNS.sh && chmod +x SetAliDNS.sh && sudo ./SetAliDNS.sh
卸載
sudo ./SetAliDNS.sh restore
鍵盤修改
xmodmap -e "keycode 105=Delete"
先確保執行這個. win7 以上才支持 WER windows error report 功能 .
windows 彈出提示框, 然后進程管理器,右鍵手工導出也行.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Windows Error Reporting\LocalDumps]
"DumpFolder"="c:\\"
"DumpCount"=dword:00000030
"DumpType"=dword:00000002
"CustomDumpFlags"=dword:00000000
c++ debug版本 + pdb文件
另外需要注意不是所有情況都生成core.
windows 改了注冊表不生成core的原因:
· Debugging dump files of optimized code can be confusing. For example, compiler inlining of functions can result in unexpected call stacks and other optimizations might change the lifetime of variables.
· Dump files from 64-bit machines must be debugged on an instance of Visual Studio that is running on a 64-bit computer.
· In versions of Visual Studio before VS 2013, dumps of 32-bit apps that were run on 64-bit machines that were collected by some tools (such as Task Manager and 64-bit WinDbg) could not be opened in Visual Studio. This limitation has been removed in VS 2013.
· Visual Studio can debug dump files of native apps from ARM devices. Visual Studio can also debug apps dump files of managed apps from ARM devices, but only in the native debugger.
· To debug kernel-mode dump files in Visual Studio 2013, download the Windows 8.1 Version of Debugging Tools for Windows. See Kernel Debugging in Visual Studio.
· Visual Studio can't debug dump files saved in the older dump format known as a full user-mode dump. Note that a full user-mode dump is not the same a dump with heap.
· To debug with the SOS.dll (SOS Debugging Extension) in Visual Studio, you must install the Debugging Tools for Windows that is part of the Windows Driver Kit (WDK). See Windows 8.1 Preview: Download kits, bits, and tools.
參考:
Collecting User-Mode Dumps --注冊表
http://msdn.microsoft.com/en-us/library/windows/desktop/bb787181(v=vs.85).aspx
Crash Dump Analysis --- c++ 自己生成dump
http://msdn.microsoft.com/en-us/library/windows/desktop/ee416349(v=vs.85).aspx
Use Dump Files to Debug App Crashes and Hangs in Visual Studio
http://msdn.microsoft.com/en-us/library/d5zhxt22.aspx#bkmk_requirements_and_limitations
Attach to Running Processes with the Visual Studio Debugger
http://msdn.microsoft.com/en-us/library/3s68z0b3.aspx
Just-In-Time Debugging in Visual Studio ------- 還沒看
http://msdn.microsoft.com/en-us/library/5hs4b7a6.aspx
The Discipline and Method Architecture for Reusable Libraries (2000)
Citations
| 1489 | The C++ Programming Language - Stroustrup - 1991 |
| 1437 | Object-Oriented Software Construction - Meyer - 1997 |
| 861 | Design Patterns - Gamma, Helm, et al. - 1995 |
| 303 | Purify: Fast detection of memory leaks and access errors - Hastings, Joyce - 1991 |
| 232 | Rational design process: how and why to fake it - Parnas, Clements - 1986 |
| 118 | The Art of Computer Programming, Volume 1 - Knuth - 1998 |
| 89 | Scalable software libraries - Batory, Singhal, et al. - 1993 |
| 67 | The Library Scaling Problem and the Limits of Concrete Component Reuse - Biggerstaff - 1994 |
| 57 | Algorithm-oriented generic libraries - Musser, Stepanov - 1994 |
| 47 | Vmalloc: A general and efficient memory allocator - Vo - 1996 |
| 37 | Algorithms, 2nd edition - Sedgewick - 1988 |
| 30 | An Empirical Study of Delta Algorithms - Hunt, Vo, et al. - 1996 |
| 27 | Empirical measurements of six allocation-intensive C programs - Zorn, Grunwald - 1992 |
| 19 | Porting Unix to Windows NT - Korn |
| 19 | Xept: A software instrumentation method for exception handling - Vo, Wang, et al. - 1997
|
| 18 | Worst case fragmentation of first fit and best fit storage allocation strategies - Robson - 1977 |
| 17 | libg++, the GNU C++ library - Lea - 1988 |
| 13 | On the external storage fragmentation produced by first-fit and best-fit allocation strategies - Shore - 1975 |
| 11 | C Interfaces and Implementation - Hanson - 1997 |
| 10 | National Standard for Information Systems { Programming Language C. Technical Report X3J11/89{159, ANSI Accredited Standards Committee, X3 Information Processing Systems - American - 1989 |
| 9 | Ksh - an extensible high level language - Korn - 1994 |
| 7 | Associative arrays - Koenig - 1988 |
| 5 | CDT: A Container Data Type Library - Vo - 1997 |
| 5 | Making a vector Fit for a Standard - Stroustrup - 1994 |
| 4 | Vdelta: Differencing and Compression - Korn, Vo - 1995 |
| 4 | Kiem-Phong Vo. Principles for Writing Reusable Library - Fowler, Korn - 1995 |
| 3 | Practical Reusable Unix Software - Krisnamurthy - 1995 |
| 2 | Negotiated Interfaces for Software Reuse - Clements, Parnas, et al. - 1992 |
| 1 | Concrete software libraries - Vo - 1998 |
| 1 | Sfio: A Buffered I/O Library. Software---Practice and Experience - Fowler, Korn, et al. - 199
|
#include <sys/stat.h>
long file_length(char *f)
{
struct stat st;
stat(f, &st);
return st.st_size;
}
If you have the file stream (FILE * f):
fseek(f, 0, SEEK_END); // seek to end of file
size = ftell(f); // get current file pointer
fseek(f, 0, SEEK_SET); // seek back to beginning of file
// proceed with allocating memory and reading the file
Or,
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
fd = fileno(f);
struct stat buf;
fstat(fd, &buf);
int size = buf.st_size;
Or, use stat, if you know the filename:
#include <sys/stat.h>
struct stat st;
stat(filename, &st);
size = st.st_size;
relocation error: multiget: symbol _Z23wxHandleFatalExceptionsb, version WXU_2.8 not defined in file libwx_baseu-2.8.so.0
下載地址:
http://www.codeblocks.org/downloads/26
http://sourceforge.net/projects/codeblocks/files/Binaries/13.12-RC1/Linux%20(64bit)/
codeblocks-13.12-1.el5.x86_64.tar.bz2
安裝的關鍵
Note: On RedHat/CentOS 5 and older revisions of 6 (up to 6.2 as far as I know) you need to add repoforge (former rpmforge) to your repolist, to be able to install the needed wxGTK-package. Seehttp://repoforge.org/use for an instruction.
更新yum的源 很重要
http://repoforge.org/use/ 下載對應的rpm
cat /etc/redhat-release
uname –a
wget http://apt.sw.be/redhat/el6/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm
rpm -ivh package-filename
# yum install gcc
# yum install gcc-c++
如果之前失敗過 yum erase wxGTK
# yum install wxGTK
然后
]# ls
codeblocks-12.11-1.el6.i686.rpm
codeblocks-contrib-12.11-1.el6.i686.rpm
codeblocks-contrib-devel-12.11-1.el6.i686.rpm
codeblocks-devel-12.11-1.el6.i686.rpm
# rpm -ivh codeblocks*
1. 下載repo文件
下載地址：http://mirrors.163.com/.help/CentOS6-Base-163.repo
2. 備份并替換系統的repo文件
[root@localhost ~]# cd /etc/yum.repos.d/
[root@localhost ~]# mv CentOS-Base.repo CentOS-Base.repo.bak
[root@localhost ~]# mv /root/CentOS6-Base-163.repo CentOS-Base.repo
3. 執行yum源更新
[root@localhost ~]# yum clean all
[root@localhost ~]# yum makecache
[root@localhost ~]# yum update
yum install gcc gcc-g++ autoconfig automake
參考:
http://blog.csdn.net/dupei/article/details/6428346
http://www.cnblogs.com/magialmoon/archive/2013/05/05/3061108.html
sqlplus 外面執行正常.
tomcat調用老有問題.多調用幾次久正常.
可能是包中的全局變量引起的.
If so, that's because your package is stateful:
The values of the variables, constants, and cursors that a package declares (in either its specification or body) comprise its package state. If a PL/SQL package declares at least one variable, constant, or cursor, then the package is stateful; otherwise, it is stateless.
When you recompile the state is lost:
If the body of an instantiated, stateful package is recompiled (either explicitly, with the "ALTER PACKAGE Statement", or implicitly), the next invocation of a subprogram in the package causes Oracle Database to discard the existing package state and raise the exception ORA-04068.
After PL/SQL raises the exception, a reference to the package causes Oracle Database to re-instantiate the package, which re-initializes it...
You can't avoid this if your package has state. I think it's fairly rare to really need a package to be stateful though, so you should revisit anything you have declared in the package, but outside a function or procedure, to see if it's really needed at that level. Since you're on 10g though, that includes constants, not just variables and cursors.
But the last paragraph from the quoted documentation means that the next time you reference the package in the same session, you won't get the error and it will work as normal (until you recompile again).
existing state of packages has been discarded means, that your Package had some sort of state.
This is caused by a global variable (or constant) stored in your Package Body.
Since the package has already been used in your session, Oracle assumes that this state is relevant for you. Some of these variables might have different values now, and when you recompile the Body, the values are reset.
This exception is thrown, so that your clients know that they can't rely on those variables any more.
You could try to remove all global variables and constants from the Package Body, or close your session and reconnect before calling the package again.
參考:
http://stackoverflow.com/questions/2502722/pl-sql-package-invalidated
http://stackoverflow.com/questions/19376440/ora-06508-pl-sql-could-not-find-program-unit-being-called