Revert "Implement tls scanning for darwin LSan"

This reverts r303262, due to TSan buildbot breakages.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@303266 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 23 deletions

diff --git a/lib/sanitizer_common/sanitizer_mac.cc b/lib/sanitizer_common/sanitizer_mac.cc
index 6fa2e4a66..2f990b805 100644
--- a/lib/sanitizer_common/sanitizer_mac.cc
+++ b/lib/sanitizer_common/sanitizer_mac.cc
@@ -370,27 +370,6 @@ uptr GetTlsSize() {
 void InitTlsSize() {
 }
 
-uptr TlsBaseAddr() {
-  uptr segbase = 0;
-#if defined(__x86_64__)
-  asm("movq %%gs:0,%0" : "=r"(segbase));
-#elif defined(__i386__)
-  asm("movl %%gs:0,%0" : "=r"(segbase));
-#endif
-  return segbase;
-}
-
-// The size of the tls on darwin does not appear to be well documented,
-// however the vm memory map suggests that it is 1024 uptrs in size,
-// with a size of 0x2000 bytes on x86_64 and 0x1000 bytes on i386.
-uptr TlsSize() {
-#if defined(__x86_64__) || defined(__i386__)
-  return 1024 * sizeof(uptr);
-#else
-  return 0;
-#endif
-}
-
 void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
                           uptr *tls_addr, uptr *tls_size) {
 #if !SANITIZER_GO
@@ -398,8 +377,8 @@ void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
   GetThreadStackTopAndBottom(main, &stack_top, &stack_bottom);
   *stk_addr = stack_bottom;
   *stk_size = stack_top - stack_bottom;
-  *tls_addr = TlsBaseAddr();
-  *tls_size = TlsSize();
+  *tls_addr = 0;
+  *tls_size = 0;
 #else
   *stk_addr = 0;
   *stk_size = 0;