[Haskell-cafe] how to debug segfaults in ghc-compiled executable?

[Phyx]

Hi,

Give addr2line a try, the address may be in an SO.

Regards,
Tamar

Sent from my Mobile

On Wed, May 8, 2019, 10:01 Johannes Waldmann <
johannes.waldmann at htwk-leipzig.de> wrote:

> Dear Cafe,
>
> I keep getting spurious segfaults from a dynamically
> linked executable compiled by ghc. In dmesg:
>
> [402186.145258] pure-matchbox:w[25362]: segfault at 7f98644a5c00 ip
> 00000000017ab65e sp 00007f98377f9988 error 4
> [402186.145262] Code: b8 0a 7e 77 01 48 83 ec 08 48 89 df 48 89 c3 31 c0
> ff d3 48 83 c4 08 48 8b 1c 25 50 90 a7 01 48 89 c1 48 6b c9 18 48 83 c1
> 10 <48> 83 3c 0b 00 74 30 48 8b 1c 25 50 90 a7 01 48 6b c0 18 48 83 c0
>
> How can I find out what part of the program this refers to?
>
> The error might be related to external libraries (used by hmatrix-glpk)
> but I don't know how to verify this.
>
> When I look at the output of `nm´ for this executable,
> I am not seeing any address like  00017ab65e.
>
> I do not have a concrete reproducible test case,
> but the bug happens statistically (say, in one out of 1000 runs).
>
> - J.
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