I'd be curious to see if the PID of the process that is failed to attach to is the same as one of the PIDs of a process that was previously attached to (and if so, if it is the first such case where a PID is recycled).
On Sat, Jan 5, 2019 at 4:42 AM Florian Weimer via lldb-dev < lldb-dev@lists.llvm.org> wrote: > * Jan Kratochvil: > > > On Fri, 04 Jan 2019 17:38:42 +0100, Florian Weimer via lldb-dev wrote: > >> Run it in a loop like this: > >> > >> $ while ./test-attach ; do date; done > >> > >> On Linux x86-64 (Fedora 29), with LLDB 7 (lldb-7.0.0-1.fc29.x86_64) and > >> kernel 4.19.12 (kernel-4.19.12-301.fc29.x86_64), after 100 iterations or > >> so, attaching to the newly created process fails: > >> > >> test-attach: SBTarget::Attach failed: lost connection > > > > FYI after 30000 runs it still runs fine with your reproducer both with > system > > lldb-devel-7.0.0-1.fc29.x86_64 and COPR > > lldb-experimental-devel-8.0.0-0.20190102snap0.fc29.x86_64 (=trunk), part > > running without /usr/lib/debug and part with. > > Well, that's odd. Shall I try to reproduce this on a lab machine? > > > Fedora 29 x86_64 + kernel-4.19.10-300.fc29.x86_64 > > > > (I haven't investigated the code why it could fail this way.) > > First, I want to get more logging data out of LLDB. Maybe this will > tell us where things go wrong. > > Thanks, > Florian > _______________________________________________ > lldb-dev mailing list > lldb-dev@lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev >
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