1 files changed, 39 insertions, 0 deletions
diff --git a/lib/tsan/rtl/tsan_printf.cc b/lib/tsan/rtl/tsan_printf.cc
new file mode 100644
index 000000000000..6f41440fb929
--- /dev/null
+++ b/lib/tsan/rtl/tsan_printf.cc
@@ -0,0 +1,39 @@
+//===-- tsan_printf.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 "sanitizer_common/sanitizer_libc.h"
+#include "tsan_defs.h"
+#include "tsan_mman.h"
+#include "tsan_platform.h"
+
+#include <stdarg.h>  // va_list
+
+namespace __sanitizer {
+int VSNPrintf(char *buff, int buff_length, const char *format, va_list args);
+}  // namespace __sanitizer
+
+namespace __tsan {
+
+void TsanPrintf(const char *format, ...) {
+  ScopedInRtl in_rtl;
+  const uptr kMaxLen = 16 * 1024;
+  InternalScopedBuf<char> buffer(kMaxLen);
+  va_list args;
+  va_start(args, format);
+  uptr len = VSNPrintf(buffer, buffer.Size(), format, args);
+  va_end(args);
+  internal_write(CTX() ? flags()->log_fileno : 2,
+      buffer, len < buffer.Size() ? len : buffer.Size() - 1);
+}
+
+}  // namespace __tsan