1 files changed, 42 insertions, 0 deletions
diff --git a/lib/sanitizer_common/sanitizer_symbolizer_itanium.cc b/lib/sanitizer_common/sanitizer_symbolizer_itanium.cc
new file mode 100644
index 000000000000..438629492923
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_symbolizer_itanium.cc
@@ -0,0 +1,42 @@
+//===-- sanitizer_symbolizer_itanium.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 the sanitizer run-time libraries.
+// Itanium C++ ABI-specific implementation of symbolizer parts.
+//===----------------------------------------------------------------------===//
+#if defined(__APPLE__) || defined(__linux__)
+
+#include "sanitizer_symbolizer.h"
+
+#include <stdlib.h>
+
+// C++ demangling function, as required by Itanium C++ ABI. This is weak,
+// because we do not require a C++ ABI library to be linked to a program
+// using sanitizers; if it's not present, we'll just use the mangled name.
+namespace __cxxabiv1 {
+  extern "C" char *__cxa_demangle(const char *mangled, char *buffer,
+                                  size_t *length, int *status)
+    SANITIZER_WEAK_ATTRIBUTE;
+}
+
+const char *__sanitizer::Demangle(const char *MangledName) {
+  // FIXME: __cxa_demangle aggressively insists on allocating memory.
+  // There's not much we can do about that, short of providing our
+  // own demangler (libc++abi's implementation could be adapted so that
+  // it does not allocate). For now, we just call it anyway, and we leak
+  // the returned value.
+  if (__cxxabiv1::__cxa_demangle)
+    if (const char *Demangled =
+          __cxxabiv1::__cxa_demangle(MangledName, 0, 0, 0))
+      return Demangled;
+
+  return MangledName;
+}
+
+#endif  // __APPLE__ || __linux__