Em Wed, Apr 03, 2019 at 11:12:58AM +0200, Jiri Olsa escreveu: > On Wed, Apr 03, 2019 at 11:04:28AM +0200, Daniel Borkmann wrote: > > On 04/03/2019 10:46 AM, Jiri Olsa wrote: > > > On Tue, Apr 02, 2019 at 09:49:50AM -0700, andrii.nakryiko@xxxxxxxxx wrote: > > >> From: Andrii Nakryiko <andriin@xxxxxx> > > >> > > >> This patch adds new config option to trigger generation of BTF type > > >> information from DWARF debuginfo for vmlinux and kernel modules through > > >> pahole, which in turn relies on libbpf for btf_dedup() algorithm. > > > I'm using the latest pahole from git tree: > > > https://github.com/acmel/dwarves.git I've updated this oen as well, but the canonical one is at: git://git.kernel.org/pub/scm/devel/pahole/pahole.git See the fix below. > > > and getting pahole crash: > > > LD vmlinux > > > BTF vmlinux > > > die__process_inline_expansion: DW_TAG_label (0xa) @ <0x3eef8> not handled! > > > scripts/link-vmlinux.sh: line 96: 31222 Segmentation fault (core dumped) LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1} > > > make[1]: *** [/home/jolsa/linux/Makefile:1025: vmlinux] Error 139 > > > make: *** [Makefile:170: sub-make] Error 2 > > > is there some other source/dependency I'm missing? > > Yesterday night, I've tested with [0] but seems to have the same HEAD as > > the github repo you pointed out. Seems the above is coming from pahole's > > __die__process_tag() bailing out with default for DW_TAG_label? > > On my side worked fine: > hum, I also had to change the version of pahole in the patch to allow > version v1.12, because both latest pahole sources are on version 1.12, > did u have to do that? looks like there's v1.13 somewhere ;-) So, I've reproduced the problem and fixed it, please pull my latest master branch from git://git.kernel.org/pub/scm/devel/pahole/pahole.git, please do the hack to make it expect v1.12, I'll try and relase v1.13 soon, if nothing else pops up soon. Thanks for the report! - Arnaldo
