remove emulated TLS for OSX

src/rt/sections_osx_x86.d

@@ -112,83 +112,6 @@ void scanTLSRanges(void[]* rng, scope void delegate(void* pbeg, void* pend) noth
     dg(rng.ptr, rng.ptr + rng.length);
 }
 
-// NOTE: The Mach-O object file format does not allow for thread local
-//       storage declarations. So instead we roll our own by putting tls
-//       into the __tls_data and the __tlscoal_nt sections.
-//
-//       This function is called by the code emitted by the compiler.  It
-//       is expected to translate an address into the TLS static data to
-//       the corresponding address in the TLS dynamic per-thread data.
-
-// NB: the compiler mangles this function as '___tls_get_addr' even though it is extern(D)
-extern(D) void* ___tls_get_addr( void* p )
-{
-    immutable off = tlsOffset(p);
-    auto tls = getTLSBlockAlloc();
-    assert(off < tls.length);
-    return tls.ptr + off;
-}
-
-private:
-
-__gshared pthread_key_t _tlsKey;
-
-size_t tlsOffset(void* p)
-in
-{
-    assert(_sections._tlsImage[0].ptr !is null ||
-           _sections._tlsImage[1].ptr !is null);
-}
-body
-{
-    // NOTE: p is an address in the TLS static data emitted by the
-    //       compiler.  If it isn't, something is disastrously wrong.
-    immutable off0 = cast(size_t)(p - _sections._tlsImage[0].ptr);
-    if (off0 < _sections._tlsImage[0].length)
-    {
-        return off0;
-    }
-    immutable off1 = cast(size_t)(p - _sections._tlsImage[1].ptr);
-    if (off1 < _sections._tlsImage[1].length)
-    {
-        size_t sz = (_sections._tlsImage[0].length + 15) & ~cast(size_t)15;
-        return sz + off1;
-    }
-    assert(0);
-}
-
-ref void[] getTLSBlock() nothrow @nogc
-{
-    auto pary = cast(void[]*)pthread_getspecific(_tlsKey);
-    if (pary is null)
-    {
-        pary = cast(void[]*).calloc(1, (void[]).sizeof);
-        if (pthread_setspecific(_tlsKey, pary) != 0)
-        {
-            import core.stdc.stdio;
-            perror("pthread_setspecific failed with");
-            assert(0);
-        }
-    }
-    return *pary;
-}
-
-ref void[] getTLSBlockAlloc()
-{
-    auto pary = &getTLSBlock();
-    if (!pary.length)
-    {
-        auto imgs = _sections._tlsImage;
-        immutable sz0 = (imgs[0].length + 15) & ~cast(size_t)15;
-        immutable sz2 = sz0 + imgs[1].length;
-        auto p = .malloc(sz2);
-        memcpy(p, imgs[0].ptr, imgs[0].length);
-        memcpy(p + sz0, imgs[1].ptr, imgs[1].length);
-        *pary = p[0 .. sz2];
-    }
-    return *pary;
-}
-
 __gshared SectionGroup _sections;
 
 extern (C) void sections_osx_onAddImage(in mach_header* h, intptr_t slide)