异常:执行sudo opensnoop-bpfcc时，将BPF附加到kprobe失败

Question

当我尝试执行sudo opensnoop-bpfcc时，我得到这样的消息：

In file included from /virtual/main.c:4:
In file included from include/linux/sched.h:14:
In file included from include/linux/pid.h:5:
In file included from include/linux/rculist.h:11:
In file included from include/linux/rcupdate.h:40:
In file included from include/linux/preempt.h:81:
In file included from ./arch/x86/include/asm/preempt.h:7:
In file included from include/linux/thread_info.h:38:
In file included from ./arch/x86/include/asm/thread_info.h:53:
./arch/x86/include/asm/cpufeature.h:150:2: warning: "Compiler lacks ASM_GOTO support. Add -D __BPF_TRACING__ to your compiler arguments"
      [-W#warnings]
#warning "Compiler lacks ASM_GOTO support. Add -D __BPF_TRACING__ to your compiler arguments"
 ^
1 warning generated.
Traceback (most recent call last):
  File "/usr/sbin/opensnoop-bpfcc", line 127, in <module>
    b.attach_kprobe(event="sys_open", fn_name="trace_entry")
  File "/usr/lib/python2.7/dist-packages/bcc/__init__.py", line 526, in attach_kprobe
    raise Exception("Failed to attach BPF to kprobe")
Exception: Failed to attach BPF to kprobe

我不知道该怎么解决它。我刚刚使用以下命令安装了密件抄送工具

sudo apt-get install bpfcc-tools linux-headers-$(uname -r)

根据github页面https://github.com/iovisor/bcc/blob/master/INSTALL.md#ubuntu---binary上的建议

运行的操作系统是18.04.2 LTS (仿生海狸)。

Answer 1

我不得不从源代码编译bcc，而不是使用软件包安装它。

1)安装linux内核头

sudo apt install linux-headers-$(uname -r)

2)安装所需的依赖项

sudo apt-get -y install bison build-essential cmake flex git libedit-dev \ libllvm6.0 llvm-6.0-dev libclang-6.0-dev python zlib1g-dev libelf-dev

3)源码编译bcc

 git clone github.com/iovisor/bcc.git
 mkdir bcc/build; cd bcc/build 
 cmake .. -DCMAKE_INSTALL_PREFIX=/usr 
 make 
 sudo make install