tools/perf/util/demangle-cxx.cpp

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "demangle-cxx.h"
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <linux/compiler.h>
   6
   7 #ifdef HAVE_LIBBFD_SUPPORT
   8 #define PACKAGE 'perf'
   9 #include <bfd.h>
  10 #endif
  11
  12 #ifdef HAVE_CXA_DEMANGLE_SUPPORT
  13 #include <cxxabi.h>
  14 #endif
  15
  16 #if defined(HAVE_LIBBFD_SUPPORT) || defined(HAVE_CPLUS_DEMANGLE_SUPPORT)
  17 #ifndef DMGL_PARAMS
  18 #define DMGL_PARAMS     (1 << 0)  /* Include function args */
  19 #define DMGL_ANSI       (1 << 1)  /* Include const, volatile, etc */
  20 #endif
  21 #endif
  22
  23 /*
  24  * Demangle C++ function signature
  25  *
  26  * Note: caller is responsible for freeing demangled string
  27  */
  28 extern "C"
  29 char *cxx_demangle_sym(const char *str, bool params __maybe_unused,
  30                        bool modifiers __maybe_unused)
  31 {
  32 #ifdef HAVE_LIBBFD_SUPPORT
  33         int flags = (params ? DMGL_PARAMS : 0) | (modifiers ? DMGL_ANSI : 0);
  34
  35         return bfd_demangle(NULL, str, flags);
  36 #elif defined(HAVE_CPLUS_DEMANGLE_SUPPORT)
  37         int flags = (params ? DMGL_PARAMS : 0) | (modifiers ? DMGL_ANSI : 0);
  38
  39         return cplus_demangle(str, flags);
  40 #elif defined(HAVE_CXA_DEMANGLE_SUPPORT)
  41         char *output;
  42         int status;
  43
  44         output = abi::__cxa_demangle(str, /*output_buffer=*/NULL, /*length=*/NULL, &status);
  45         return output;
  46 #else
  47         return NULL;
  48 #endif
  49 }