Kefu Chai d6c7a26419
utils/logalloc: do not allocate memory in reclaim_timer::report() ...
before this change, `reclaim_timer::report()` calls
```c++
fmt::format(", at {}", current_backtrace())
```
which allocates a `std::string` on heap, so it can fail and throw. in
that case, `std::terminate()` is called. but at that moment, the reason
why `reclaim_timer::report()` gets called is that we fail to reclaim
memory for the caller. so we are more likely to run into this issue. anyway,
we should not allocate memory in this path.
in this change, a dedicated printer is created so that we don't format
to a temporary `std::string`, and instead write directly to the buffer
of logger. this avoids the memory allocation.
Fixes #18099
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com >
Closes scylladb/scylladb#18100
(cherry picked from commit fcf7ca5675
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d6c7a26419