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| /freebsd-11-stable/sys/kern/ | ||
| H A D | kern_prot.c | diff 143108 Thu Mar 03 14:57:55 MST 2005 sobomax In linux emulation layer try to detect attempt to use linux_clone() to create kernel threads and call rfork(2) with RFTHREAD flag set in this case, which puts parent and child into the same threading group. As a result all threads that belong to the same program end up in the same threading group. This is similar to what linuxthreads port does, though in this case we don't have a luxury of having access to the source code and there is no definite way to differentiate linux_clone() called for threading purposes from other uses, so that we have to resort to heuristics. Allow SIGTHR to be delivered between all processes in the same threading group previously it has been blocked for s[ug]id processes. This also should improve locking of the same file descriptor from different threads in programs running under linux compat layer. PR: kern/72922 Reported by: Andriy Gapon <avg@icyb.net.ua> Idea suggested by: rwatson |
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