Public bug reported: There are four thread local storage (TLS) models in Clang/LLVM as following: 1) global-dynamic TLS model 2) local-dynamic TLS model 3) local-exec TLS model 4) initial-exec TLS model and emulated-TLS (for Android S/W platform)??
Even though, We can build run normally with the static relocation method by selecting the initial-exec TLS model instead of global-dynamic TLS model (by default) , We need to run the clang application code with global-dynamic (or local-dynamic) TLS model in order that we support some applications is working with dlopen(3) library call. We have found the appropriate solution for some clang/LLVM applications including 1) __thread variables and 2) -O2/-O3 of the clang language. Could you apply this patch to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS repository? * LLVM: Revision 268662 (ARM: don't attempt to merge litpools referencing different PC-anchors.) http://llvm.org/viewvc/llvm-project?view=revision&revision=268662 Below is the mailing list discussed to fix this issue. http://lists.llvm.org/pipermail/llvm-dev/2016-May/098974.html http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20160502/353476.html http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20160509/355091.html http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20160516/356679.html * Before r268662: ubuntu@raspberrypi2#> ./corerun ./hello.exe Segmentation Fault * After r268662: ubuntu@raspberrypi2#> ./corerun ./hello.exe Hello!!! Welcome to .NET Core (CoreCLR) world.!!! ** Affects: llvm-defaults (Ubuntu) Importance: Undecided Status: New ** Tags: llvm-arm ** Patch added: "[LLVM] Linux/ARM: don't attempt to merge litpools referencing different PC-anchors." https://bugs.launchpad.net/bugs/1584089/+attachment/4666964/+files/0001-ARM-don-t-attempt-to-merge-litpools-referencing-diff.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1584089 Title: Segfault of __thread varaible in Linux/ARM due to bug of LLVM ARM code generation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/llvm-defaults/+bug/1584089/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
