From dcad913ab66fde15d00c8d5116b00efef082cc41 Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Wed, 20 Jul 2016 10:29:08 +0000
Subject: [PATCH] tsan: fix leak of shadow stacks

llvm-svn: 276103
---
 compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc b/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
index ab8f3c38a960..13528ae980e1 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc
@@ -125,6 +125,12 @@ void ThreadContext::OnStarted(void *arg) {
 }
 
 void ThreadContext::OnFinished() {
+#ifdef SANITIZER_GO
+  internal_free(thr->shadow_stack);
+  thr->shadow_stack = nullptr;
+  thr->shadow_stack_pos = nullptr;
+  thr->shadow_stack_end = nullptr;
+#endif
   if (!detached) {
     thr->fast_state.IncrementEpoch();
     // Can't increment epoch w/o writing to the trace as well.