1 files changed, 47 insertions, 0 deletions
diff --git a/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc b/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc
new file mode 100644
index 00000000..ada7be15
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc
@@ -0,0 +1,47 @@
+//===-- sanitizer_symbolizer_libcdep.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 shared between AddressSanitizer and ThreadSanitizer
+// run-time libraries.
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_platform.h"
+#include "sanitizer_internal_defs.h"
+#include "sanitizer_placement_new.h"
+#include "sanitizer_symbolizer.h"
+
+namespace __sanitizer {
+
+Symbolizer *Symbolizer::CreateAndStore(const char *path_to_external) {
+  Symbolizer *platform_symbolizer = PlatformInit(path_to_external);
+  if (!platform_symbolizer) return Disable();
+  atomic_store(&symbolizer_, reinterpret_cast<uptr>(platform_symbolizer),
+               memory_order_release);
+  return platform_symbolizer;
+}
+
+Symbolizer *Symbolizer::Init(const char *path_to_external) {
+  CHECK_EQ(0, atomic_load(&symbolizer_, memory_order_acquire));
+  return CreateAndStore(path_to_external);
+}
+
+Symbolizer *Symbolizer::GetOrInit() {
+  static StaticSpinMutex init_mu;
+
+  uptr sym = atomic_load(&symbolizer_, memory_order_acquire);
+  if (!sym) {
+    SpinMutexLock l(&init_mu);
+    sym = atomic_load(&symbolizer_, memory_order_relaxed);
+    if (!sym) return CreateAndStore(0);
+  }
+
+  return reinterpret_cast<Symbolizer *>(sym);
+}
+
+}  // namespace __sanitizer