[英]Exception: Failed to attach BPF to kprobe when executing sudo opensnoop-bpfcc
當我嘗試執行sudo opensnoop-bpfcc
,我收到以下消息:
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
我不明白如何解決它。 我剛剛使用此命令安裝了密件抄送工具
sudo apt-get install bpfcc-tools linux-headers-$(uname -r)
正如 github 頁面https://github.com/iovisor/bcc/blob/master/INSTALL.md#ubuntu---binary所建議的那樣
正在運行的操作系統是 18.04.2 LTS(仿生海狸)。
我不得不從源代碼編譯 bcc 而不是使用包安裝它。
1)安裝linux內核頭文件
sudo apt install linux-headers-$(uname -r)
2)安裝所需的依賴項
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) 從源代碼編譯 bcc
git clone github.com/iovisor/bcc.git
mkdir bcc/build; cd bcc/build
cmake .. -DCMAKE_INSTALL_PREFIX=/usr
make
sudo make install
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