Fw: [問題] Linux C多執行緒的疑問!?
※ [本文轉錄自 C_and_CPP 看板 #1JOU9vFQ ]
作者: BIAO (超越自己) 看板: C_and_CPP
標題: [問題] Linux C多執行緒的疑問!?
時間: Thu May 1 13:58:15 2014
開發平台(Platform): (Ex: VC++, GCC, Linux, ...)
Linux
-------------------------------
各位板友大家好，
目前小弟有個程式，內有A、B兩個thread，共用某個副程式，
其中A thread固定時間會執行該副程式，
另個B thread則隨機等候外部命令，接收外部命令後執行該副程式。
此程式在Linux內執行，
可有時候會自己中斷執行，
請問這是因為沒使用mutex，
發生衝突導致程式結束嗎!?
另想請問板友...
有什麼因素導致程式執行時，會自動結束呢!?
還請板友不吝賜教，謝謝..XD
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※ 編輯: BIAO (140.124.42.70), 05/01/2014 14:15:52
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※ 發信站: 批踢踢實業坊(ptt.cc)
※ 轉錄者: BIAO (140.124.42.70), 05/02/2014 11:30:46
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回b大的話...
我都是用vim編輯C code，
用gcc編譯後，直接用sudo ./執行程式..
偶爾加個&來背景執行.. XD
※ 編輯: BIAO (140.124.42.70), 05/02/2014 15:04:57
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目前已經完全懂b大的意思..
我的確是在interactive mode執行程式，
不過就算執行沒加上&，程序自行結束時也沒有產生程序如何結束..
我是使用Ubuntu Linux，目前在尋找產生Core dump的方法XD
C語言程序是無窮迴圈，二個thread都是..
※ 編輯: BIAO (140.124.42.70), 05/02/2014 21:25:13
※ 編輯: BIAO (140.124.42.70), 05/02/2014 21:26:33
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感謝大家的回覆，參照k大做法，
採用gcc -o -g -DDEBUG modbus+MySQL+Control26 modbus+MySQL+Control26.c
-I/usr/include/mysql -L/usr/lib/mysql -lmysqlclient -lpthread，
得到了許多資訊..
-------------------------------------
modbus+MySQL+Control26: In function `_fini':
crtstuff.c:(.fini+0x0): multiple definition of `_fini'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../arm-linux-gnueabihf/crti.o:(.fini+0x0):
first defined here
modbus+MySQL+Control26: In function `__data_start':
crtstuff.c:(.data+0x0): multiple definition of `__data_start'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../arm-linux-gnueabihf/crt1.o:(.data+0x0):
first defined here
modbus+MySQL+Control26: In function `__data_start':
crtstuff.c:(.data+0x4): multiple definition of `__dso_handle'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/crtbegin.o:(.data+0x0): first defined
here
modbus+MySQL+Control26:(.rodata+0x0): multiple definition of `_IO_stdin_used'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../arm-linux-gnueabihf/crt1.o:(.rodata.cst4+0x0):
first defined here
modbus+MySQL+Control26: In function `_start':
crtstuff.c:(.text+0x0): multiple definition of `_start'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../arm-linux-gnueabihf/crt1.o:(.text+0x0):
first defined here
modbus+MySQL+Control26: In function `_init':
crtstuff.c:(.init+0x0): multiple definition of `_init'
/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../arm-linux-gnueabihf/crti.o:(.init+0x0):
first defined here
/tmp/ccj4NCbh.o:(.bss+0x0): multiple definition of `data_lock'
modbus+MySQL+Control26:(.bss+0x10): first defined here
/tmp/ccj4NCbh.o: In function `sock_server_thread':
modbus+MySQL+Control26.c:(.text+0x0): multiple definition of
`sock_server_thread'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:38:
first defined here
/tmp/ccj4NCbh.o: In function `order_dec':
modbus+MySQL+Control26.c:(.text+0x3f4): multiple definition of `order_dec'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:154:
first defined here
/tmp/ccj4NCbh.o: In function `control':
modbus+MySQL+Control26.c:(.text+0x7f4): multiple definition of `control'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:248:
first defined here
/tmp/ccj4NCbh.o: In function `status':
modbus+MySQL+Control26.c:(.text+0x2098): multiple definition of `status'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:697:
first defined here
/tmp/ccj4NCbh.o: In function `info':
modbus+MySQL+Control26.c:(.text+0x1204): multiple definition of `info'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:469:
first defined here
/tmp/ccj4NCbh.o: In function `main':
modbus+MySQL+Control26.c:(.text+0x378): multiple definition of `main'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:132:
first defined here
/tmp/ccj4NCbh.o: In function `modbustcp':
modbus+MySQL+Control26.c:(.text+0x2c20): multiple definition of `modbustcp'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:898:
first defined here
/tmp/ccj4NCbh.o: In function `modbusrtu':
modbus+MySQL+Control26.c:(.text+0x2f1c): multiple definition of `modbusrtu'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:1004:
first defined here
/tmp/ccj4NCbh.o: In function `info_insert':
modbus+MySQL+Control26.c:(.text+0x1c88): multiple definition of `info_insert'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:636:
first defined here
/tmp/ccj4NCbh.o: In function `cost_power':
modbus+MySQL+Control26.c:(.text+0x1e1c): multiple definition of `cost_power'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:660:
first defined here
/tmp/ccj4NCbh.o: In function `status_insert':
modbus+MySQL+Control26.c:(.text+0x2844): multiple definition of
`status_insert'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:839:
first defined here
/tmp/ccj4NCbh.o: In function `crc16':
modbus+MySQL+Control26.c:(.text+0x321c): multiple definition of `crc16'
modbus+MySQL+Control26:/home/ubuntu/C-practice/Test/modbus+MySQL+Control26.c:1114:
first defined here
collect2: ld returned 1 exit status
ubuntu@localhost:~/C-practice/Test$
-------------------------------------
這些資訊是沒加上-g不會出現的..XD
※ 編輯: BIAO (140.124.42.70), 05/03/2014 13:18:36