[llvm-dev] sancov reporting all locations as <invalid>:0

[Mike Aizatsky via llvm-dev]

Yes, instructions are in Inputs/test.cpp (main test file).

On Tue, Mar 7, 2017 at 3:32 PM Justin Bogner <mail at justinbogner.com> wrote:

> Are there instructions on how Inputs/foo.cpp was compiled to generate
> the binaries in the sancov tests? We should probably create .sancov and
> .symcov files for macOS so that we're actually testing it at all.
>
> Justin Bogner <mail at justinbogner.com> writes:
> > So I tried using full debug info and it fails the same way, which is
> > probably to be expected. After poking around in test/tools/sancov I'm
> > fairly sure the problem is that I'm on macOS, given that almost all of
> > the tests there have "REQUIRES: x86_64-linux".
> >
> > Mike Aizatsky <aizatsky at google.com> writes:
> >> I'll need more details then. Maybe you can share the binary & its
> .sancov
> >> file? Or if you have a way to reproduce it?
> >>
> >> On Tue, Mar 7, 2017 at 1:23 PM Kostya Serebryany <kcc at google.com>
> wrote:
> >>
> >>> On Tue, Mar 7, 2017 at 12:50 PM, Mike Aizatsky <aizatsky at google.com>
> >>> wrote:
> >>>
> >>> Justin,
> >>>
> >>> I haven't seen this before. I suspect it is because of
> line-tables-only.
> >>> Can you try it with full debug info?
> >>>
> >>>
> >>> That would be strange.
> >>> -gline-tables-only is *the* recommended flag for all of the sanitizers,
> >>> I'd expect it to work.
> >>>
> >>>
> >>>
> >>>
> >>> On Tue, Mar 7, 2017 at 12:36 PM Kostya Serebryany <kcc at google.com>
> wrote:
> >>>
> >>> +aizatsky
> >>>
> >>> On Tue, Mar 7, 2017 at 12:34 PM, Justin Bogner <mail at justinbogner.com>
> >>> wrote:
> >>>
> >>> I'm working on a fuzzer using libFuzzer and I wanted to take a look at
> >>> how my coverage was doing, as per the instructions here:
> >>>
> >>>   http://llvm.org/docs/LibFuzzer.html#how-good-is-my-fuzzer
> >>>
> >>> First of all, I suspect the instructions there are out of date, but
> >>> passing -dump_coverage=1 to the binary rather than setting ASAN_OPTIONS
> >>> generated a .sancov file for me.
> >>>
> >>> However, when I inspect this with the sancov tool, all of the line
> >>> numbers it reports are "<invalid>:0". I can list the covered and
> >>> uncovered functions successfully, but without locations it's really
> hard
> >>> to do anything with that information.
> >>>
> >>> I've built with -gline-tables-only, as is the default when building
> llvm
> >>> with sanitizers enabled.
> >>>
> >>> Have you seen this before? Am I doing something obviously wrong?
> >>>
> >>>
> >>> --
> >>> Mike
> >>> Sent from phone
> >>>
> >>> --
> >> Mike
> >> Sent from phone
>
-- 
Mike
Sent from phone
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