tsan: handle early signals
The second part of the fix of
https://code.google.com/p/thread-sanitizer/issues/detail?id=71

llvm-svn: 217031
diff --git a/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc b/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
index a08c1e0..156f3b8 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
@@ -123,7 +123,6 @@
           "tls_addr=%zx tls_size=%zx\n",
           tid, (uptr)epoch0, args->stk_addr, args->stk_size,
           args->tls_addr, args->tls_size);
-  thr->is_alive = true;
 }
 
 void ThreadContext::OnFinished() {
@@ -284,7 +283,7 @@
     DontNeedShadowFor(thr->stk_addr, thr->stk_size);
   if (thr->tls_addr && thr->tls_size)
     DontNeedShadowFor(thr->tls_addr, thr->tls_size);
-  thr->is_alive = false;
+  thr->is_dead = true;
   ctx->thread_registry->FinishThread(thr->tid);
 }