[Tarantool-patches] [PATCH luajit v2] memprof: report JIT-side allocations as internal

[Igor Munkin]

Misha,

I've checked the patch into tarantool branch in tarantool/luajit and
bumped a new version in master.

On 29.07.21, Mikhail Shishatskiy wrote:
> There are cases when the memory profiler attempts to attribute
> allocations triggered by the JIT engine recording phase
> with a Lua function to be recorded. In this case,
> lj_debug_frameline() may return BC_NOPOS (i.e. a negative value).
> 
> Previously, these situations were ignored and the profiler
> reported, that the source line was equal to zero.
> 
> This patch adjusts profiler behavior to treat allocations
> described above as internal by dumping ASOURCE_INT if
> lj_debug_frameline() returns a negative value.
> 
> Resolves tarantool/tarantool#5679
> ---
> 
> Issue: https://github.com/tarantool/tarantool/issues/5679
> Branch: https://github.com/tarantool/luajit/tree/shishqa/gh-5679-report-jit-allocations-as-internal
> CI: https://github.com/tarantool/tarantool/tree/shishqa/gh-5679-report-jit-allocations-as-internal
> 
> Changes in v2:
>   - Fixed commit title to fit in width of 50 symbols;
>   - Rebased to the branch [1];
>   - Reused default_payload() as a payload to test patch behavior.
> 
> [1]: https://github.com/tarantool/luajit/tree/shishqa/gh-5814-group-allocations-on-trace-by-trace-number
> 
>  src/lj_memprof.c                              | 28 ++++++++++++-------
>  .../misclib-memprof-lapi.test.lua             | 16 ++++++++---
>  2 files changed, 30 insertions(+), 14 deletions(-)
> 

<snipped>

> -- 
> 2.32.0
> 

-- 
Best regards,
IM