lib/sanitizer_common/sanitizer_symbolizer_itanium.cc

   1 //===-- sanitizer_symbolizer_itanium.cc -----------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file is shared between the sanitizer run-time libraries.
  11 // Itanium C++ ABI-specific implementation of symbolizer parts.
  12 //===----------------------------------------------------------------------===//
  13 #if defined(__APPLE__) || defined(__linux__)
  14
  15 #include "sanitizer_symbolizer.h"
  16
  17 #include <stdlib.h>
  18
  19 // C++ demangling function, as required by Itanium C++ ABI. This is weak,
  20 // because we do not require a C++ ABI library to be linked to a program
  21 // using sanitizers; if it's not present, we'll just use the mangled name.
  22 namespace __cxxabiv1 {
  23   extern "C" char *__cxa_demangle(const char *mangled, char *buffer,
  24                                   size_t *length, int *status)
  25     SANITIZER_WEAK_ATTRIBUTE;
  26 }
  27
  28 const char *__sanitizer::Demangle(const char *MangledName) {
  29   // FIXME: __cxa_demangle aggressively insists on allocating memory.
  30   // There's not much we can do about that, short of providing our
  31   // own demangler (libc++abi's implementation could be adapted so that
  32   // it does not allocate). For now, we just call it anyway, and we leak
  33   // the returned value.
  34   if (__cxxabiv1::__cxa_demangle)
  35     if (const char *Demangled =
  36           __cxxabiv1::__cxa_demangle(MangledName, 0, 0, 0))
  37       return Demangled;
  38
  39   return MangledName;
  40 }
  41
  42 #endif  // __APPLE__ || __linux__