hezhiye
commented
1 year ago Hi
我采用容器编译后，该问题消失，但是有2个宏没有定义
ICMPV6_EXT_ECHO_REQUEST
ICMPV6_EXT_ECHO_REPLY
后来我直接把这两个删了
然后有llc -march=bpf -filetype=obj -o progs/ntrace.o In file included from progs/ntrace.c:7: /root/nettrace/shared/bpf/skb_parse.h:365:13: error: invalid application of 'typeof' to bit-field l4_proto = _C(sk, sk_protocol); ^ /root/nettrace/shared/bpf/skb_parse.h:71:20: note: expanded from macro '_C'
define C(src, a) ((src)->a)
^/root/nettrace/shared/bpf/skbparse.h:64:8: note: expanded from macro '' typeof(src) tmp; \ ^ /root/nettrace/shared/bpf/skb_parse.h:365:13: error: invalid application of 'sizeof' to bit-field /root/nettrace/shared/bpf/skb_parse.h:71:20: note: expanded from macro '_C'
define C(src, a) ((src)->a)
^/root/nettrace/shared/bpf/skbparse.h:65:36: note: expanded from macro ''
bpf_probe_read_kernel(&tmp, sizeof(src), &(src)); \
^
/root/nettrace/shared/bpf/skb_parse.h:365:13: error: address of bit-field requested
l4_proto = _C(sk, sk_protocol);
^~~~~~~
/root/nettrace/shared/bpf/skb_parse.h:71:20: note: expanded from macro '_C'
define C(src, a) ((src)->a)
^~~~~~~~~~~/root/nettrace/shared/bpf/skbparse.h:65:43: note: expanded from macro ''
bpf_probe_read_kernel(&tmp, sizeof(src), &(src)); \
^ ~~~
3 errors generated.
bpftool gen skeleton progs/ntrace.o > progs/ntrace.skel.h
gcc mark.c /root/nettrace/shared/pkt_utils.c /root/nettrace/component/net_utils.c /root/nettrace/component/arg_parse.c /root/nettrace/component/sys_utils.c /root/nettrace/shared/bpf_utils.c -o mark -lbpf -lelf -lz -O2 -static -I./ -I/root/nettrace/shared/bpf/ -DCOMPAT_MODE -Wno-deprecated-declarations -DVERSION=1.2.5 -DRELEASE=.tl3 -I/root/nettrace/shared/ -I/root/nettrace/component
mark.c: In function 'main':
mark.c:83:12: error: 'struct ntrace' has no member named 'data'
83 | obj->data->_bpf_args = bpf_args;
| ^~
In file included from common.h:19,
from mark.c:4:
/root/nettrace/shared/bpf_utils.h:9:53: error: 'struct ntrace' has no member named 'progs'
9 | #define BPF_PROG_FD(name) (bpf_program__fd(obj->progs.name))
| ^~
mark.c:95:23: note: in expansion of macro 'BPF_PROG_FD'
95 | if (tc_attach(BPF_PROG_FD(ntrace_mark), nic, tc_pref, false))
| ^~~
/root/nettrace/shared/bpf_utils.h:10:49: error: 'struct ntrace' has no member named 'maps'
10 | #define BPF_MAP_FD(name) (bpf_map__fd(obj->maps.name))
| ^~
mark.c:99:21: note: in expansion of macro 'BPF_MAP_FD'
99 | perf_output(BPF_MAP_FD(m_event), print_bpf_output);
| ^~~~~~
make[1]: *** [../common.mk:103: mark] Error 1
rm progs/ntrace.o
错误，但能编译出nettrace
menglongdong
kawhicurry
Hi : 我的系统是ubuntu 20.04LTS,安装了sudo apt install libelf-dev libbpf-dev linux-headers-
uname -rclang llvm gcc linux-tools-uname -rlinux-tools-generic -ymake命令编译的时候出现 rm progs/ntrace.o make[1]: Leaving directory '/home/zhiye/tools/sourcecodebuild/nettrace/nodetrace' make[1]: Entering directory '/home/zhiye/tools/sourcecodebuild/nettrace/src' python3 gen_trace.py > trace_group.c ln -s ../shared/bpf/vmlinux.h kheaders.h clang -O2 -c -g -S -Wall -Wno-pointer-sign -Wno-unused-value \ -Wno-incompatible-pointer-types-discards-qualifiers \ -fno-asynchronous-unwind-tables \ progs/tracing.c -emit-llvm -Wno-unknown-attributes -I./ -I/home/zhiye/tools/sourcecodebuild/nettrace/shared/bpf/ -DSTACK_TRACE -Wno-unused-function -Xclang \ -disable-llvm-passes -o - | \ opt -O2 -mtriple=bpf-pc-linux | \ llvm-dis | \ llc -march=bpf -filetype=obj -o progs/tracing.o bpftool gen skeleton progs/tracing.o > progs/tracing.skel.h /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8) python3 gen_trace.py probe > progs/kprobe_trace.h clang -O2 -c -g -S -Wall -Wno-pointer-sign -Wno-unused-value \ -Wno-incompatible-pointer-types-discards-qualifiers \ -fno-asynchronous-unwind-tables \ progs/kprobe.c -emit-llvm -Wno-unknown-attributes -I./ -I/home/zhiye/tools/sourcecodebuild/nettrace/shared/bpf/ -DSTACK_TRACE -Wno-unused-function -Xclang \ -disable-llvm-passes -o - | \ opt -O2 -mtriple=bpf-pc-linux | \ llvm-dis | \ llc -march=bpf -filetype=obj -o progs/kprobe.o bpftool gen skeleton progs/kprobe.o > progs/kprobe.skel.h /bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8) gcc trace.c /home/zhiye/tools/sourcecodebuild/nettrace/shared/pkt_utils.c /home/zhiye/tools/sourcecodebuild/nettrace/component/net_utils.c /home/zhiye/tools/sourcecodebuild/nettrace/component/arg_parse.c /home/zhiye/tools/sourcecodebuild/nettrace/component/sys_utils.c /home/zhiye/tools/sourcecodebuild/nettrace/shared/bpf_utils.c trace_probe.c trace_tracing.c analysis.c /home/zhiye/tools/sourcecodebuild/nettrace/component/parse_sym.c trace_group.c dropreason.c nettrace.c -o nettrace -lbpf -lelf -lz -g -O2 -static -I./ -I/home/zhiye/tools/sourcecodebuild/nettrace/shared/bpf/ -DSTACK_TRACE -Wno-deprecated-declarations -DVERSION=1.2.5 -DRELEASE=.tl3 -I/home/zhiye/tools/sourcecodebuild/nettrace/shared/ -I/home/zhiye/tools/sourcecodebuild/nettrace/component /usr/bin/ld: /tmp/ccs5ijfW.o: in function
probe_trace_attach_manual': /home/zhiye/tools/sourcecodebuild/nettrace/src/trace_probe.c:34: undefined reference tobpf_program__set_autoattach' collect2: error: ld returned 1 exit status make[1]: *** [../common.mk:100: nettrace] Error 1