tsan: fix clang -Wall build

Clang does not like classes with virtual functions but w/o virtual dtor.
Go does not like libstdc++ (operator delete).

llvm-svn: 177267

compiler-rt/lib/sanitizer_common/sanitizer_thread_registry.cc

@@ -22,7 +22,11 @@ ThreadContextBase::ThreadContextBase(u32 tid)
   name[0] = '\0';
 }
 
-ThreadContextBase::~ThreadContextBase() {}
+#ifndef SANITIZER_GO
+ThreadContextBase::~ThreadContextBase() {
+  CHECK(0);
+}
+#endif
 
 void ThreadContextBase::SetName(const char *new_name) {
   name[0] = '\0';

compiler-rt/lib/sanitizer_common/sanitizer_thread_registry.h

@@ -34,6 +34,9 @@ enum ThreadStatus {
 class ThreadContextBase {
  public:
   explicit ThreadContextBase(u32 tid);
+#ifndef SANITIZER_GO  // Go does not have libstdc++
+  virtual
+#endif
   ~ThreadContextBase();
 
   const u32 tid;  // Thread ID. Main thread should have tid = 0.

compiler-rt/lib/tsan/rtl/tsan_rtl.h

@@ -419,6 +419,7 @@ struct ThreadDeadInfo {
 class ThreadContext : public ThreadContextBase {
  public:
   explicit ThreadContext(int tid);
+  ~ThreadContext();
   ThreadState *thr;
 #ifdef TSAN_GO
   StackTrace creation_stack;

compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cc

@@ -31,6 +31,11 @@ ThreadContext::ThreadContext(int tid)
   , dead_info() {
 }
 
+#ifndef TSAN_GO
+ThreadContext::~ThreadContext() {
+}
+#endif
+
 void ThreadContext::OnDead() {
   sync.Reset();
 }