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  • Ubuntu 11.10 (Oneiric)上编译带utrace补丁的内核 转

    Ubuntu 11.10 (Oneiric)上编译带utrace补丁的内核
    首先准备linux内核编译环境:
    sudo apt-get install fakeroot build-essential crash kexec-tools makedumpfile kernel-wedge kernel-package
    sudo apt-get build-dep linux
    sudo apt-get install git-core libncurses5 libncurses5-dev libelf-dev asciidoc binutils-dev
    检出带有utrace补丁的官方内核代码,并生成对应Ubuntu当前版本内核(3.0)的补丁:
    git clone https://github.com/utrace/linux.git utrace-linux-git
    cd utrace-linux-git/
    git checkout -b utrace-3.0 origin/utrace-3.0
    git diff v3.0 > /tmp/utrace.patch
    获得Ubuntu定制内核代码,并打上utrace补丁
    sudo apt-get install linux-source
    tar xjf /usr/src/linux-source-3.0.0.tar.bz2
    cd linux-source-3.0.0/
    patch -p1 < /tmp/utrace.patch
    输出为:
    patching file Documentation/DocBook/Makefile
    patching file Documentation/DocBook/utrace.tmpl
    patching file arch/x86/kernel/ptrace.c
    patching file fs/proc/array.c
    patching file include/linux/ptrace.h
    patching file include/linux/sched.h
    Hunk #1 succeeded at 187 (offset 3 lines).
    Hunk #2 succeeded at 206 (offset 3 lines).
    Hunk #3 succeeded at 1415 with fuzz 2 (offset 7 lines).
    patching file include/linux/signal.h
    patching file include/linux/tracehook.h
    patching file include/linux/utrace.h
    patching file init/Kconfig
    Hunk #1 succeeded at 388 (offset 16 lines).
    patching file kernel/Makefile
    patching file kernel/fork.c
    Hunk #1 FAILED at 168.
    Hunk #2 succeeded at 1098 (offset 3 lines).
    1 out of 2 hunks FAILED -- saving rejects to file kernel/fork.c.rej
    patching file kernel/ptrace.c
    patching file kernel/sched.c
    patching file kernel/signal.c
    Hunk #4 succeeded at 1993 (offset -2 lines).
    Hunk #5 succeeded at 2017 (offset -2 lines).
    Hunk #6 succeeded at 2124 (offset -2 lines).
    Hunk #7 succeeded at 2132 (offset -2 lines).
    patching file kernel/utrace.c
     注意 kernel/fork.c 的补丁失败了,看看 kernel/fork.c.rej:
    --- kernel/fork.c                                                               
    +++ kernel/fork.c                                                               
    @@ -168,6 +168,7 @@                                                             
        free_thread_info(tsk->stack);                                               
        rt_mutex_debug_task_free(tsk);                                              
        ftrace_graph_exit_task(tsk);                                                
    +   tracehook_free_task(tsk);                                                   
        free_task_struct(tsk);                                                      
     }                                                                              
     EXPORT_SYMBOL(free_task);                                                      
    修改 kernel/fork.c,在 free_task 函数的 ftrace_graph_exit_task(tsk); 之后手工加上这行 tracehook_free_task 调用即可。
    
    编译新的内核,使用当前系统内核的配置参数作为基准,开启 utrace 补丁提供的 CONFIG_UTRACE 功能即可:
    cp /boot/config-`uname -r` .config
    make oldconfig ,出现如下提示时回答 y:Infrastructure for tracing and debugging user processes (UTRACE) [N/y/?] (NEW) 
    make-kpkg clean
    export CONCURRENCY_LEVEL=9 ,这里指定编译内核时的并发任务数,设置为核数+1即可
    fakeroot make-kpkg --initrd --append-to-version=-utrace binary-arch
    编译完成后,在 linux-source-3.0.0/ 的上级目录会生成 linux-headers/image/debug-symbol 的 deb 安装包,直接用 sudo dpkg -i *.deb 安装即可。重启后选择新内核进入即可用 systemtap 进行用户态程序跟踪。
     
    参考:
     
    https://help.ubuntu.com/community/Kernel/Compile#Alternate_Build_Method:_The_Old-Fashioned_Debian_Way
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  • 原文地址:https://www.cnblogs.com/zengkefu/p/4820927.html
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