GDB附加到可执行文件被删除的进程 [英] GDB attaching to a process where executable is deleted

问题描述

我正在运行进程，但它的可执行文件已被删除。
如果我尝试附加gdb，我得到以下错误：

pre $ / home / vivek / binary / releases / 20120328101511 / bin /app.exe（删除）：没有这样的文件或目录。


如何将gdb附加到此过程中？

示例测试用例：
源代码：

  #include< stdio.h> 
＃include< stdlib.h> 
 int main（）{
 for（;;）{
 printf（Sleeping）; 
 sleep（1）; 
 
 
 $ / code $ / pre 
 
 
编译它
 
 
  gcc main.cc -o a.out 
 gcc main.cc -o b.out 
  
运行
 ./a.out 
 
 
 
现在从不同的终端删除a.out。 
和fire gdb附加 pgrep a.out 文件b.out 
无效。 
 
 
 GDB显示以下错误： 
 
 
  /tmp/temp/a.out（删除）：没有这样的文件或目录。 
程序已被调试。杀了它？ （y或n）n 
程序没有死亡。 
  
 
 
解决方案
尝试使用 / proc / < pid> / exe 作为可执行文件。它似乎是一个符号链接，但是，过去有可能从中提取被删除的可执行文件。
 
 
 
请参阅检测删除的可执行文件。
 
 
 
我们可以使用以下命令来附加gdb  
 
 
  gdb<路径二进制> < PID> 
  
 
I have running process but it's executable file has got deleted. 
If I try to attach gdb I got following error 
/home/vivek/binary/releases/20120328101511/bin/app.exe (deleted): No such file or directory.
How can I attach gdb to this process ?


Sample Test case:
Source code:
#include<stdio.h>
#include<stdlib.h>
int main(){
  for (;;){
    printf("Sleeping");
    sleep(1);
  }
}
compile it
 gcc main.cc -o a.out
 gcc main.cc -o b.out
Run 
./a.out

Now from different terminal delete a.out. 
And fire gdb attach pgrep a.out file b.out 
It doesn't work.

GDB shows following error:
/tmp/temp/a.out (deleted): No such file or directory.
A program is being debugged already.  Kill it? (y or n) n
Program not killed.

解决方案
Try using /proc/<pid>/exe as the executable. It appears as a symbolic link these days, however, in the past it was possible to extract the deleted executable from it.

See Detecting deleted executables.

We can use following command to attach gdb 
gdb <path-to-binary> <pid>


                        
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