tsan: use dynamic shadow stack for Go
llvm-svn: 160288
diff --git a/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc b/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
index 81242a7..6756bd3 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
@@ -173,6 +173,14 @@
tctx->epoch1 = (u64)-1;
new(thr) ThreadState(CTX(), tid, tctx->epoch0, stk_addr, stk_size,
tls_addr, tls_size);
+#ifdef TSAN_GO
+ // Setup dynamic shadow stack.
+ const int kInitStackSize = 8;
+ thr->shadow_stack = (uptr*)internal_alloc(MBlockShadowStack,
+ kInitStackSize * sizeof(uptr));
+ thr->shadow_stack_pos = thr->shadow_stack;
+ thr->shadow_stack_end = thr->shadow_stack + kInitStackSize;
+#endif
tctx->thr = thr;
thr->fast_synch_epoch = tctx->epoch0;
thr->clock.set(tid, tctx->epoch0);