tsan: better diagnostics if thread finishes with ignores enabled

print thread creation stack
and stacks where ignores were enabled.

llvm-svn: 195836

1 files changed, 47 insertions, 0 deletions

diff --git a/compiler-rt/lib/tsan/rtl/tsan_ignoreset.cc b/compiler-rt/lib/tsan/rtl/tsan_ignoreset.cc
new file mode 100644
index 00000000000..cdb90d22998
--- /dev/null
+++ b/compiler-rt/lib/tsan/rtl/tsan_ignoreset.cc
@@ -0,0 +1,47 @@
+//===-- tsan_ignoreset.cc -------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+#include "tsan_ignoreset.h"
+
+namespace __tsan {
+
+const uptr IgnoreSet::kMaxSize;
+
+IgnoreSet::IgnoreSet()
+    : size_() {
+}
+
+void IgnoreSet::Add(u32 stack_id) {
+  if (size_ == kMaxSize)
+    return;
+  for (uptr i = 0; i < size_; i++) {
+    if (stacks_[i] == stack_id)
+      return;
+  }
+  stacks_[size_++] = stack_id;
+}
+
+void IgnoreSet::Reset() {
+  size_ = 0;
+}
+
+uptr IgnoreSet::Size() const {
+  return size_;
+}
+
+u32 IgnoreSet::At(uptr i) const {
+  CHECK_LT(i, size_);
+  CHECK_LE(size_, kMaxSize);
+  return stacks_[i];
+}
+
+}  // namespace __tsan