Bug#976922: systemd-bootchart: FTBFS on ppc64el: dh_auto_test: error: make -j160 check VERBOSE=1 returned exit code 2

[Michael Biebl]

Am 11.12.20 um 09:09 schrieb Lucas Nussbaum:
> On 10/12/20 at 22:12 +0100, Michael Biebl wrote:
>> Am 10.12.20 um 22:10 schrieb John Paul Adrian Glaubitz:
>>> Hi Michael!
>>>
>>> On 12/10/20 8:42 PM, Michael Biebl wrote:
>>>> ============================================================================
>>>> Testsuite summary for systemd-bootchart 233
>>>> ============================================================================
>>>> # TOTAL: 1
>>>> # PASS:  1
>>>> # SKIP:  0
>>>> # XFAIL: 0
>>>> # FAIL:  0
>>>> # XPASS: 0
>>>> # ERROR: 0
>>>> ============================================================================
>>>
>>> Did the test machine you used actually have that many cores?
>>
>> No idea
> 
> I tried building with SMT off (so the machine only has 20 visible
> cores). I could reproduce the failure. (I disabled SMT at runtime using
> ppc64_cpu --smt=off)
> 
> It also fails when running 'make check VERBOSE=1' (so it's not caused by
> parallelism).
> 
> It crashes with:
> (gdb) r -o /tmp/tmp.k64Np1I2cr -n 10 -r -p
> Starting program: /root/systemd-bootchart-233/systemd-bootchart -o /tmp/tmp.k64Np1I2cr -n 10 -r -p
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/powerpc64le-linux-gnu/libthread_db.so.1".
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000100004d04 in svg_ps_bars (interval=<optimized out>, graph_start=2775.3698308829998, ps_first=0x1000505d0, n_cpus=1,
>      n_samples=10, head=0x100050770, of=0x1000503f0) at src/svg.c:1187
> 1187	        i = ps->sample->next->sampledata->counter;
> (gdb) bt
> #0  0x0000000100004d04 in svg_ps_bars (interval=<optimized out>, graph_start=2775.3698308829998, ps_first=0x1000505d0,
>      n_cpus=1, n_samples=10, head=0x100050770, of=0x1000503f0) at src/svg.c:1187

This looks a lot like

https://github.com/systemd/systemd-bootchart/pull/37
specifically
https://github.com/systemd/systemd-bootchart/pull/37/commits/65320230f5fcb02e81df5131a4dc03092558c263

Could you give this PR a try?