On Thu, Mar 05, 2020 at 08:03:53PM +0000, Song Liu wrote:
SNIP
> >> prog.c:1650:29: error: ‘struct profiler_bpf’ has no member named ‘rodata’
> >> 1650 | __u32 m, cpu, num_cpu = obj->rodata->num_cpu;
> >> | ^~
> >> prog.c: In function ‘profile_open_perf_events’:
> >> prog.c:1810:19: error: ‘struct profiler_bpf’ has no member named ‘rodata’
> >> 1810 | sizeof(int), obj->rodata->num_cpu * obj->rodata->num_metric);
> >> | ^~
> >> prog.c:1810:42: error: ‘struct profiler_bpf’ has no member named ‘rodata’
> >> 1810 | sizeof(int), obj->rodata->num_cpu * obj->rodata->num_metric);
> >> | ^~
> >> prog.c:1825:26: error: ‘struct profiler_bpf’ has no member named ‘rodata’
> >> 1825 | for (cpu = 0; cpu < obj->rodata->num_cpu; cpu++) {
> >> | ^~
> >> prog.c: In function ‘do_profile’:
> >> prog.c:1904:13: error: ‘struct profiler_bpf’ has no member named ‘rodata’
> >> 1904 | profile_obj->rodata->num_cpu = num_cpu;
> >> | ^~
> >> prog.c:1905:13: error: ‘struct profiler_bpf’ has no member named ‘rodata’
> >> 1905 | profile_obj->rodata->num_metric = num_metric;
> >> | ^~
> >> make: *** [Makefile:129: prog.o] Error 1
> >
> > I guess you need a newer version of clang that supports global data in BPF programs.
>
> Hi Jiri,
>
> Have you got chance to test this with latest clang?
yep, got it compiled with new clang
I was testing in on bpftrace programs and couldn't made it work,
because it relies on BTF info.. so I got stuck ;-)
# bpftool prog profile id 241 duration 3 cycles instructions llc_misses
Error: prog FD 3 doesn't have valid btf
nit.. ^^^ you could display ID instead of FD in here
I need to check if we can provide BTF info for bpftrace programs
jirka
