[TSan] Fix TSan initializaion.

TSan uses procfs for every ThreadContext.
We should ensure that procfs is mounted, to
avoid an error when TSan is initializing.

Change-Id: I8e9a3ec6f8920c95b5246bda56f5c55ef9fffb0e

diff --git a/libsanitizer/tsan/tsan_rtl.cc b/libsanitizer/tsan/tsan_rtl.cc
index 0a40e3c..dd679f3 100644 (file)
--- a/libsanitizer/tsan/tsan_rtl.cc
+++ b/libsanitizer/tsan/tsan_rtl.cc
@@ -336,6 +336,7 @@ void Initialize(ThreadState *thr) {
 
   ctx = new(ctx_placeholder) Context;
   const char *options = GetEnv(SANITIZER_GO ? "GORACE" : "TSAN_OPTIONS");
+  MaybeMountProcFS();
   CacheBinaryName();
   InitializeFlags(&ctx->flags, options);
   AvoidCVE_2016_2143();