On Thu, 25 Apr 2019 at 12:25, Johannes Pfau <johannesp...@gmail.com> wrote: > > This adds emulated TLS support to druntime. > The main problem here is that the D garbage collector needs > to be able to scan the TLS memory for pointers, which is not > possible with the current libgcc implementation. > > This therefore reimplements the libgcc emutls > support (__emutls_get_address, ...) in druntime, taking > care to expose an interface for the GC to scan memory > (_d_emutls_scan). Due to the library link order, in most > cases D code will corrently call the implementation in > druntime. Where this does not work is if a C program > loads a D library, then the D library will continue to > use the libgcc implementation. This can be fixed in > GCC 10 in various ways, but for now this patch > will allow most use cases for MinGW, OSX and other > emutls targets to work. > > In section code, the _d_emutls_scan function and > _d_emutls_destroy functions need to be called. This > patch implements this for the elf_shared sections code. > > Bootstrapped on x86_64 linux with --disable-tls, checked > testsuite with --disable-tls and without. Initial review > on https://github.com/D-Programming-GDC/gcc/pull/13 >
OK, as it unblocks getting libphobos support for OSX and other emutls targets. -- Iain.
