Ubuntu 11.10 (Oneiric)上编译带utrace补丁的内核 转
2015-09-19 09:34
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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[/code]
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