tsan: better diagnostics if thread finishes with ignores enabled

print thread creation stack
and stacks where ignores were enabled.



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@195836 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 38 insertions, 0 deletions

diff --git a/lib/tsan/rtl/tsan_ignoreset.h b/lib/tsan/rtl/tsan_ignoreset.h
new file mode 100644
index 000000000..e747d819c
--- /dev/null
+++ b/lib/tsan/rtl/tsan_ignoreset.h
@@ -0,0 +1,38 @@
+//===-- tsan_ignoreset.h ----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of ThreadSanitizer (TSan), a race detector.
+//
+// IgnoreSet holds a set of stack traces where ignores were enabled.
+//===----------------------------------------------------------------------===//
+#ifndef TSAN_IGNORESET_H
+#define TSAN_IGNORESET_H
+
+#include "tsan_defs.h"
+
+namespace __tsan {
+
+class IgnoreSet {
+ public:
+  static const uptr kMaxSize = 16;
+
+  IgnoreSet();
+  void Add(u32 stack_id);
+  void Reset();
+  uptr Size() const;
+  u32 At(uptr i) const;
+
+ private:
+  uptr size_;
+  u32 stacks_[kMaxSize];
+};
+
+}  // namespace __tsan
+
+#endif  // TSAN_IGNORESET_H