<div dir="ltr"><div>Hi Jameson,</div><div>Why thread local support is hard to support in JITs? Whether Julia supports Thread locals? If so, it would be very much helpful to know how.</div><div><br></div><div>Thanks<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, 20 Dec 2019 at 23:31, Jameson Nash via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">This had also came up at llvm-devmtg briefly at the JIT roundtable. One of the collaborators on my project had started a patch years ago to implement some of it <a href="https://reviews.llvm.org/D8815" target="_blank">https://reviews.llvm.org/D8815</a>, but then we went a different direction with TLS in our frontend and it became unnecessary.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Dec 20, 2019 at 12:36 PM David Blaikie via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">+Lang for visibility<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Dec 20, 2019 at 5:09 AM Geoff Levner via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr">I am in the process of porting our ORC code to ORC v2 and LLJIT. Now that I have worked around a problem getting global constructors to be called, everything seems to work unless a module declares a static thread-local variable. In that case I get a "JIT session error" saying that the symbol __<a href="http://emutls_v.xyz" target="_blank">emutls_v.xyz</a> was not found (substitute the mangled variable name for "xyz").</div><div dir="ltr"><br></div><div>Does that mean anything to anybody out there?</div><div><br></div><div>(I don't know if it's relevant, but we are using LLVM 8, and we are using Clang to compile C++ modules that are all put into a single JITDylib.)</div><div><br></div><div>Geoff</div></div></div>
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