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Groups > linux.kernel > #1485472
| From | Linus Torvalds <torvalds@linux-foundation.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v2] scripts: add script for translating stack dump function offsets |
| Date | 2016-09-17 04:40 +0200 |
| Message-ID | <sidHP-52b-1@gated-at.bofh.it> (permalink) |
| References | (7 earlier) <si6ZH-ym-19@gated-at.bofh.it> <si8RP-1P5-7@gated-at.bofh.it> <sibmF-3x5-3@gated-at.bofh.it> <sibZn-3MK-5@gated-at.bofh.it> <sid57-4pC-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Fri, Sep 16, 2016 at 6:59 PM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> And finally, I suspect (5) is not reasonably fixable. Oh well. It
> would require some kind of "figure out the largest common prefix of
> all the filenames in the whole object file". So I'm *not* talking
> about just passing "--basenames" to addr2line.
>
> Hmm. Maybe looking up the "DW_AT_comp_dir" tag in the debug info would
> work? And just stripping that off?
Thinking more about this, that actually sounds like it might be the
right thing to do.
It doesn't work for most projects, but the way the kernel build system
is set up, we don't actually recursively descend into subdirectories,
we always build at the top level. So DW_AT_comp_dir should always (?)
be the actual top-level build directory, and we could just scrape that
off from the addr2line output.
That said, I don't even know what the "real" way to dump the debug
symbol data is. I do *not* believe that you should use
readelf -W --debug-dump vmlinux | grep DW_AT_comp_dir | head -1
to get the information. There is bound to be something much better.
Somebody who knows the ELF tools can now pipe in and show the world
what a maroon I am.
Linus
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perf: perf_fuzzer lockup in perf_cgroup_attach Vince Weaver <vincent.weaver@maine.edu> - 2016-09-15 04:50 +0200
Re: perf: perf_fuzzer lockup in perf_cgroup_attach Stephane Eranian <eranian@google.com> - 2016-09-15 07:40 +0200
Re: perf: perf_fuzzer lockup in perf_cgroup_attach Peter Zijlstra <peterz@infradead.org> - 2016-09-15 09:30 +0200
Re: perf: perf_fuzzer lockup in perf_cgroup_attach Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-15 14:20 +0200
[PATCH] scripts: add script for translating stack dump function offsets Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-16 16:50 +0200
Re: [PATCH] scripts: add script for translating stack dump function offsets Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-16 20:20 +0200
Re: [PATCH] scripts: add script for translating stack dump function offsets Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-16 21:20 +0200
Re: [PATCH] scripts: add script for translating stack dump function offsets Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-16 21:30 +0200
[PATCH v2] scripts: add script for translating stack dump function offsets Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-16 23:30 +0200
Re: [PATCH v2] scripts: add script for translating stack dump function offsets Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-17 02:10 +0200
Re: [PATCH v2] scripts: add script for translating stack dump function offsets Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-17 02:50 +0200
Re: [PATCH v2] scripts: add script for translating stack dump function offsets Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-17 04:00 +0200
Re: [PATCH v2] scripts: add script for translating stack dump function offsets Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-17 04:40 +0200
Re: [PATCH v2] scripts: add script for translating stack dump function offsets Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-17 20:50 +0200
[PATCH v3] scripts: add script for translating stack dump function Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-19 18:00 +0200
Re: [PATCH v3] scripts: add script for translating stack dump function Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-19 21:00 +0200
Re: [PATCH v3] scripts: add script for translating stack dump function Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-19 21:20 +0200
Re: [PATCH v3] scripts: add script for translating stack dump function Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-19 21:30 +0200
Re: [PATCH v3] scripts: add script for translating stack dump function Rabin Vincent <rabin@rab.in> - 2016-09-19 22:10 +0200
Re: [PATCH v3] scripts: add script for translating stack dump function Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-19 22:30 +0200
Re: [PATCH v3] scripts: add script for translating stack dump function Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-19 23:00 +0200
Re: [PATCH v3] scripts: add script for translating stack dump function Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-19 23:10 +0200
Re: [PATCH v3] scripts: add script for translating stack dump function Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-19 23:10 +0200
Re: [PATCH v2] scripts: add script for translating stack dump function offsets Peter Zijlstra <peterz@infradead.org> - 2016-09-17 03:30 +0200
Re: [PATCH v2] scripts: add script for translating stack dump function offsets Rabin Vincent <rabin@rab.in> - 2016-09-17 10:20 +0200
Re: [PATCH v2] scripts: add script for translating stack dump function offsets Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-17 20:50 +0200
Re: [PATCH] scripts: add script for translating stack dump function offsets Vegard Nossum <vegard.nossum@gmail.com> - 2016-09-17 11:20 +0200
Re: [PATCH] scripts: add script for translating stack dump function offsets Josh Poimboeuf <jpoimboe@redhat.com> - 2016-09-17 21:00 +0200
Re: perf: perf_fuzzer lockup in perf_cgroup_attach Vince Weaver <vincent.weaver@maine.edu> - 2016-09-15 14:50 +0200
Re: perf: perf_fuzzer lockup in perf_cgroup_attach Peter Zijlstra <peterz@infradead.org> - 2016-09-15 09:20 +0200
Re: perf: perf_fuzzer lockup in perf_cgroup_attach Vince Weaver <vincent.weaver@maine.edu> - 2016-09-15 14:50 +0200
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