bugGNU Octave - Bugs: bug #55432, clang w/ ASAN:...


bug #55432: clang w/ ASAN: stack-use-after-scope (starting octave)

Submitted by:  Dmitri A. Sergatskov <dasergatskov>
Submitted on:  Thu 10 Jan 2019 12:00:54 AM UTC  
Category:  None Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Segfault, Bus Error, etc.
Status:  Invalid Assigned to:  None
Originator Name:  Open/Closed:  Closed
Release:  5.0.1 Operating System:  GNU/Linux

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Tue 22 Jan 2019 11:58:01 PM UTC, comment #9:

Great. Closing report as Invalid.

Rik <rik5>
Project Administrator
Tue 22 Jan 2019 11:47:17 PM UTC, comment #8:

I compile with clang w/o asan all the time -- no problem.


Dmitri A. Sergatskov <dasergatskov>
Tue 22 Jan 2019 11:43:40 PM UTC, comment #7:

In the output, I see

and indeed the problem is occurring downstream from an Octave unwind_protect block. My guess is that this is just a false positive.

If you compile without ASAN, can you start Octave? Does it pass 'make check'?

If yes, then I think we can close this report.

Rik <rik5>
Project Administrator
Tue 22 Jan 2019 10:52:29 PM UTC, comment #6:

OK, I managed to downgrade to clang-6.0.1
The problem is still there:

hg id
f6730533820e (stable) tip


Dmitri A. Sergatskov <dasergatskov>
Tue 22 Jan 2019 09:44:55 PM UTC, comment #5:

I will try, though it is kind of involved -- Fedora provide runtime for older clangs, but not the compiler...


Dmitri A. Sergatskov <dasergatskov>
Tue 22 Jan 2019 09:39:53 PM UTC, comment #4:

Can you go forward or backwards a revision in clang to see if it an upstream issue? If there is no trouble with a clang 6.X compilation then I think we can say it is a problem with the clang 7.0.1 release.

Rik <rik5>
Project Administrator
Tue 22 Jan 2019 09:34:16 PM UTC, comment #3:

Yes it is still a problem that I see. I cannot run
octave compiled with clang with ASAN.

It is quite possible it is a false positive.


Dmitri A. Sergatskov <dasergatskov>
Tue 22 Jan 2019 06:35:20 PM UTC, comment #2:

Is this still an issue?

Is it really just a false positive with clang 7.0.1 and ASAN?

Rik <rik5>
Project Administrator
Thu 10 Jan 2019 01:51:54 AM UTC, comment #1:

To determine whether this is just a clang issue, can you go backwards or forwards a version?

Rik <rik5>
Project Administrator
Thu 10 Jan 2019 12:00:54 AM UTC, original submission:

I tried to compile octave with clang and asan.
I cannot start the compiled binary:

May be it is an issue with clang (7.0.1) -- the detect_stack_use_after_scope=0 should suppress this diagnostic
but it does not.

But may be there is something in


Dmitri A. Sergatskov <dasergatskov>


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    Follow 3 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2019-01-22 rik5 StatusNeed Info => Invalid
        Open/ClosedOpen => Closed
    2019-01-22 rik5 StatusNone => Need Info

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