[Bug libstdc++/68606] Reduce or disable the static emergency pool for C++ exceptions

[dumoulin.thibaut at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68606

Thibaut M. <dumoulin.thibaut at gmail dot com> changed:

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                 CC|                            |dumoulin.thibaut at gmail dot com

--- Comment #10 from Thibaut M. <dumoulin.thibaut at gmail dot com> ---
I understand the patch
https://gcc.gnu.org/legacy-ml/gcc-patches/2016-12/msg01158.html has not been
applied.

The dynamic constructor of global variable `pool emergency_pool;` in
`libstdc++-v3/libsupc++/eh_alloc.cc` remains and is still allocating
unconditionally at least 2.5ko on the heap.

> see the "performance of exception handling" / "size of exception handling"
> thread in this month's archive of the gcc mailing list
I was not able to find the thread about "exception handling" of 2020-05, could
you point it out or detail the conclusion please?

Has a solution been found for embedded systems with very limited resources? In
this case for example, C++ exceptions can be disabled and this emergency pool
not needed.