krytarowski added inline comments.
================
Comment at: source/Plugins/Process/FreeBSD/FreeBSDThread.cpp:128
+ if (kp == nullptr || (error != 0 && errno == ENOMEM)) {
+ // Add extra space in case threads are added before next call.
+ len += sizeof(*kp) + len / 10;
----------------
Besides my other notes about dedicated ptrace(2) call for reading thread name
on FreeBSD, I'm not sure whether FreeBSD supports "online" debugging (there was
a dedicated GDB term I forgot right now) of a running process. If so, there is
no need extra space approach.
https://reviews.llvm.org/D30981
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